mcs/class/Managed.Windows.Forms/System.Windows.Forms/ListView.cs

   1 // Permission is hereby granted, free of charge, to any person obtaining
   2 // a copy of this software and associated documentation files (the
   3 // "Software"), to deal in the Software without restriction, including
   4 // without limitation the rights to use, copy, modify, merge, publish,
   5 // distribute, sublicense, and/or sell copies of the Software, and to
   6 // permit persons to whom the Software is furnished to do so, subject to
   7 // the following conditions:
   8 //
   9 // The above copyright notice and this permission notice shall be
  10 // included in all copies or substantial portions of the Software.
  11 //
  12 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  13 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  14 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  15 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  16 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  17 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  18 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  19 //
  20 // Copyright (c) 2004-2005 Novell, Inc. (http://www.novell.com)
  21 //
  22 // Authors:
  23 //      Ravindra Kumar (rkumar@novell.com)
  24 //      Jordi Mas i Hernandez, jordi@ximian.com
  25 //      Mike Kestner (mkestner@novell.com)
  26 //      Daniel Nauck (dna(at)mono-project(dot)de)
  27 //
  28 // TODO:
  29 //   - Feedback for item activation, change in cursor types as mouse moves.
  30 //   - LabelEdit
  31 //   - Drag and drop
  32
  33
  34 // NOT COMPLETE
  35
  36
  37 using System.Collections;
  38 using System.ComponentModel;
  39 using System.ComponentModel.Design;
  40 using System.Drawing;
  41 using System.Runtime.InteropServices;
  42 using System.Globalization;
  43 #if NET_2_0
  44 using System.Collections.Generic;
  45 #endif
  46
  47 namespace System.Windows.Forms
  48 {
  49         [DefaultEvent ("SelectedIndexChanged")]
  50         [DefaultProperty ("Items")]
  51         [Designer ("System.Windows.Forms.Design.ListViewDesigner, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.IDesigner")]
  52 #if NET_2_0
  53         [ClassInterface (ClassInterfaceType.AutoDispatch)]
  54         [ComVisible (true)]
  55         [Docking (DockingBehavior.Ask)]
  56 #endif
  57         public class ListView : Control
  58         {
  59                 private ItemActivation activation = ItemActivation.Standard;
  60                 private ListViewAlignment alignment = ListViewAlignment.Top;
  61                 private bool allow_column_reorder = false;
  62                 private bool auto_arrange = true;
  63                 private bool check_boxes = false;
  64                 private readonly CheckedIndexCollection checked_indices;
  65                 private readonly CheckedListViewItemCollection checked_items;
  66                 private readonly ColumnHeaderCollection columns;
  67                 internal ListViewItem focused_item;
  68                 private bool full_row_select = false;
  69                 private bool grid_lines = false;
  70                 private ColumnHeaderStyle header_style = ColumnHeaderStyle.Clickable;
  71                 private bool hide_selection = true;
  72                 private bool hover_selection = false;
  73                 private IComparer item_sorter;
  74                 private readonly ListViewItemCollection items;
  75 #if NET_2_0
  76                 private readonly ListViewGroupCollection groups;
  77                 private bool show_groups = true;
  78 #endif
  79                 private bool label_edit = false;
  80                 private bool label_wrap = true;
  81                 private bool multiselect = true;
  82                 private bool scrollable = true;
  83                 private readonly SelectedIndexCollection selected_indices;
  84                 private readonly SelectedListViewItemCollection selected_items;
  85                 private SortOrder sort_order = SortOrder.None;
  86                 private ImageList state_image_list;
  87                 private bool updating = false;
  88                 private View view = View.LargeIcon;
  89                 private int layout_wd;    // We might draw more than our client area
  90                 private int layout_ht;    // therefore we need to have these two.
  91                 //private TextBox editor;   // Used for editing an item text
  92                 HeaderControl header_control;
  93                 internal ItemControl item_control;
  94                 internal ScrollBar h_scroll; // used for scrolling horizontally
  95                 internal ScrollBar v_scroll; // used for scrolling vertically
  96                 internal int h_marker;          // Position markers for scrolling
  97                 internal int v_marker;
  98                 private int keysearch_tickcnt;
  99                 private string keysearch_text;
 100                 static private readonly int keysearch_keydelay = 1000;
 101                 private int[] reordered_column_indices;
 102 #if NET_2_0
 103                 private Size tile_size;
 104 #endif
 105
 106                 // internal variables
 107                 internal ImageList large_image_list;
 108                 internal ImageList small_image_list;
 109                 internal Size text_size = Size.Empty;
 110
 111                 #region Events
 112                 static object AfterLabelEditEvent = new object ();
 113                 static object BeforeLabelEditEvent = new object ();
 114                 static object ColumnClickEvent = new object ();
 115                 static object ItemActivateEvent = new object ();
 116                 static object ItemCheckEvent = new object ();
 117                 static object ItemDragEvent = new object ();
 118                 static object SelectedIndexChangedEvent = new object ();
 119
 120                 public event LabelEditEventHandler AfterLabelEdit {
 121                         add { Events.AddHandler (AfterLabelEditEvent, value); }
 122                         remove { Events.RemoveHandler (AfterLabelEditEvent, value); }
 123                 }
 124
 125                 [Browsable (false)]
 126                 [EditorBrowsable (EditorBrowsableState.Never)]
 127                 public new event EventHandler BackgroundImageChanged {
 128                         add { base.BackgroundImageChanged += value; }
 129                         remove { base.BackgroundImageChanged -= value; }
 130                 }
 131
 132                 public event LabelEditEventHandler BeforeLabelEdit {
 133                         add { Events.AddHandler (BeforeLabelEditEvent, value); }
 134                         remove { Events.RemoveHandler (BeforeLabelEditEvent, value); }
 135                 }
 136
 137                 public event ColumnClickEventHandler ColumnClick {
 138                         add { Events.AddHandler (ColumnClickEvent, value); }
 139                         remove { Events.RemoveHandler (ColumnClickEvent, value); }
 140                 }
 141
 142                 public event EventHandler ItemActivate {
 143                         add { Events.AddHandler (ItemActivateEvent, value); }
 144                         remove { Events.RemoveHandler (ItemActivateEvent, value); }
 145                 }
 146
 147                 public event ItemCheckEventHandler ItemCheck {
 148                         add { Events.AddHandler (ItemCheckEvent, value); }
 149                         remove { Events.RemoveHandler (ItemCheckEvent, value); }
 150                 }
 151
 152                 public event ItemDragEventHandler ItemDrag {
 153                         add { Events.AddHandler (ItemDragEvent, value); }
 154                         remove { Events.RemoveHandler (ItemDragEvent, value); }
 155                 }
 156
 157                 [Browsable (false)]
 158                 [EditorBrowsable (EditorBrowsableState.Never)]
 159                 public new event PaintEventHandler Paint {
 160                         add { base.Paint += value; }
 161                         remove { base.Paint -= value; }
 162                 }
 163
 164                 public event EventHandler SelectedIndexChanged {
 165                         add { Events.AddHandler (SelectedIndexChangedEvent, value); }
 166                         remove { Events.RemoveHandler (SelectedIndexChangedEvent, value); }
 167                 }
 168
 169                 [Browsable (false)]
 170                 [EditorBrowsable (EditorBrowsableState.Never)]
 171                 public new event EventHandler TextChanged {
 172                         add { base.TextChanged += value; }
 173                         remove { base.TextChanged -= value; }
 174                 }
 175
 176                 #endregion // Events
 177
 178                 #region Public Constructors
 179                 public ListView ()
 180                 {
 181                         background_color = ThemeEngine.Current.ColorWindow;
 182                         items = new ListViewItemCollection (this);
 183 #if NET_2_0
 184                         groups = new ListViewGroupCollection (this);
 185 #endif
 186                         checked_indices = new CheckedIndexCollection (this);
 187                         checked_items = new CheckedListViewItemCollection (this);
 188                         columns = new ColumnHeaderCollection (this);
 189                         foreground_color = SystemColors.WindowText;
 190                         selected_indices = new SelectedIndexCollection (this);
 191                         selected_items = new SelectedListViewItemCollection (this);
 192
 193                         border_style = BorderStyle.Fixed3D;
 194
 195                         header_control = new HeaderControl (this);
 196                         header_control.Visible = false;
 197                         Controls.AddImplicit (header_control);
 198
 199                         item_control = new ItemControl (this);
 200                         Controls.AddImplicit (item_control);
 201
 202                         h_scroll = new ImplicitHScrollBar ();
 203                         Controls.AddImplicit (this.h_scroll);
 204
 205                         v_scroll = new ImplicitVScrollBar ();
 206                         Controls.AddImplicit (this.v_scroll);
 207
 208                         h_marker = v_marker = 0;
 209                         keysearch_tickcnt = 0;
 210
 211                         // scroll bars are disabled initially
 212                         h_scroll.Visible = false;
 213                         h_scroll.ValueChanged += new EventHandler(HorizontalScroller);
 214                         v_scroll.Visible = false;
 215                         v_scroll.ValueChanged += new EventHandler(VerticalScroller);
 216
 217                         // event handlers
 218                         base.KeyDown += new KeyEventHandler(ListView_KeyDown);
 219                         SizeChanged += new EventHandler (ListView_SizeChanged);
 220                         GotFocus += new EventHandler (FocusChanged);
 221                         LostFocus += new EventHandler (FocusChanged);
 222                         MouseWheel += new MouseEventHandler(ListView_MouseWheel);
 223
 224                         this.SetStyle (ControlStyles.UserPaint | ControlStyles.StandardClick
 225 #if NET_2_0
 226                                 | ControlStyles.UseTextForAccessibility
 227 #endif
 228                                 , false);
 229                 }
 230                 #endregion      // Public Constructors
 231
 232                 #region Private Internal Properties
 233                 internal Size CheckBoxSize {
 234                         get {
 235                                 if (this.check_boxes) {
 236                                         if (this.state_image_list != null)
 237                                                 return this.state_image_list.ImageSize;
 238                                         else
 239                                                 return ThemeEngine.Current.ListViewCheckBoxSize;
 240                                 }
 241                                 return Size.Empty;
 242                         }
 243                 }
 244
 245                 #endregion      // Private Internal Properties
 246
 247                 #region  Protected Properties
 248                 protected override CreateParams CreateParams {
 249                         get { return base.CreateParams; }
 250                 }
 251
 252                 protected override Size DefaultSize {
 253                         get { return ThemeEngine.Current.ListViewDefaultSize; }
 254                 }
 255                 #endregion      // Protected Properties
 256
 257                 #region Public Instance Properties
 258                 [DefaultValue (ItemActivation.Standard)]
 259                 public ItemActivation Activation {
 260                         get { return activation; }
 261                         set {
 262                                 if (value != ItemActivation.Standard && value != ItemActivation.OneClick &&
 263                                         value != ItemActivation.TwoClick) {
 264                                         throw new InvalidEnumArgumentException (string.Format
 265                                                 ("Enum argument value '{0}' is not valid for Activation", value));
 266                                 }
 267
 268                                 activation = value;
 269                         }
 270                 }
 271
 272                 [DefaultValue (ListViewAlignment.Top)]
 273                 [Localizable (true)]
 274                 public ListViewAlignment Alignment {
 275                         get { return alignment; }
 276                         set {
 277                                 if (value != ListViewAlignment.Default && value != ListViewAlignment.Left &&
 278                                         value != ListViewAlignment.SnapToGrid && value != ListViewAlignment.Top) {
 279                                         throw new InvalidEnumArgumentException (string.Format
 280                                                 ("Enum argument value '{0}' is not valid for Alignment", value));
 281                                 }
 282
 283                                 if (this.alignment != value) {
 284                                         alignment = value;
 285                                         // alignment does not matter in Details/List views
 286                                         if (this.view == View.LargeIcon ||
 287                                             this.View == View.SmallIcon)
 288                                                 this.Redraw (true);
 289                                 }
 290                         }
 291                 }
 292
 293                 [DefaultValue (false)]
 294                 public bool AllowColumnReorder {
 295                         get { return allow_column_reorder; }
 296                         set { allow_column_reorder = value; }
 297                 }
 298
 299                 [DefaultValue (true)]
 300                 public bool AutoArrange {
 301                         get { return auto_arrange; }
 302                         set {
 303                                 if (auto_arrange != value) {
 304                                         auto_arrange = value;
 305                                         // autoarrange does not matter in Details/List views
 306                                         if (this.view == View.LargeIcon || this.View == View.SmallIcon)
 307                                                 this.Redraw (true);
 308                                 }
 309                         }
 310                 }
 311
 312                 public override Color BackColor {
 313                         get {
 314                                 if (background_color.IsEmpty)
 315                                         return ThemeEngine.Current.ColorWindow;
 316                                 else
 317                                         return background_color;
 318                         }
 319                         set { background_color = value; }
 320                 }
 321
 322                 [Browsable (false)]
 323                 [EditorBrowsable (EditorBrowsableState.Never)]
 324                 public override Image BackgroundImage {
 325                         get { return base.BackgroundImage; }
 326                         set { base.BackgroundImage = value; }
 327                 }
 328
 329                 [DefaultValue (BorderStyle.Fixed3D)]
 330                 [DispId (-504)]
 331                 public BorderStyle BorderStyle {
 332                         get { return InternalBorderStyle; }
 333                         set { InternalBorderStyle = value; }
 334                 }
 335
 336                 [DefaultValue (false)]
 337                 public bool CheckBoxes {
 338                         get { return check_boxes; }
 339                         set {
 340                                 if (check_boxes != value) {
 341 #if NET_2_0
 342                                         if (value && View == View.Tile)
 343                                                 throw new NotSupportedException ("CheckBoxes are not"
 344                                                         + " supported in Tile view. Choose a different"
 345                                                         + " view or set CheckBoxes to false.");
 346 #endif
 347
 348                                         check_boxes = value;
 349                                         this.Redraw (true);
 350                                 }
 351                         }
 352                 }
 353
 354                 [Browsable (false)]
 355                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 356                 public CheckedIndexCollection CheckedIndices {
 357                         get { return checked_indices; }
 358                 }
 359
 360                 [Browsable (false)]
 361                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 362                 public CheckedListViewItemCollection CheckedItems {
 363                         get { return checked_items; }
 364                 }
 365
 366                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
 367                 [Localizable (true)]
 368                 [MergableProperty (false)]
 369                 public ColumnHeaderCollection Columns {
 370                         get { return columns; }
 371                 }
 372
 373                 [Browsable (false)]
 374                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 375                 public ListViewItem FocusedItem {
 376                         get {
 377                                 return focused_item;
 378                         }
 379                 }
 380
 381                 public override Color ForeColor {
 382                         get {
 383                                 if (foreground_color.IsEmpty)
 384                                         return ThemeEngine.Current.ColorWindowText;
 385                                 else
 386                                         return foreground_color;
 387                         }
 388                         set { foreground_color = value; }
 389                 }
 390
 391                 [DefaultValue (false)]
 392                 public bool FullRowSelect {
 393                         get { return full_row_select; }
 394                         set { full_row_select = value; }
 395                 }
 396
 397                 [DefaultValue (false)]
 398                 public bool GridLines {
 399                         get { return grid_lines; }
 400                         set {
 401                                 if (grid_lines != value) {
 402                                         grid_lines = value;
 403                                         this.Redraw (false);
 404                                 }
 405                         }
 406                 }
 407
 408                 [DefaultValue (ColumnHeaderStyle.Clickable)]
 409                 public ColumnHeaderStyle HeaderStyle {
 410                         get { return header_style; }
 411                         set {
 412                                 if (header_style == value)
 413                                         return;
 414
 415                                 switch (value) {
 416                                 case ColumnHeaderStyle.Clickable:
 417                                 case ColumnHeaderStyle.Nonclickable:
 418                                 case ColumnHeaderStyle.None:
 419                                         break;
 420                                 default:
 421                                         throw new InvalidEnumArgumentException (string.Format
 422                                                 ("Enum argument value '{0}' is not valid for ColumnHeaderStyle", value));
 423                                 }
 424
 425                                 header_style = value;
 426                                 if (view == View.Details)
 427                                         Redraw (true);
 428                         }
 429                 }
 430
 431                 [DefaultValue (true)]
 432                 public bool HideSelection {
 433                         get { return hide_selection; }
 434                         set {
 435                                 if (hide_selection != value) {
 436                                         hide_selection = value;
 437                                         this.Redraw (false);
 438                                 }
 439                         }
 440                 }
 441
 442                 [DefaultValue (false)]
 443                 public bool HoverSelection {
 444                         get { return hover_selection; }
 445                         set { hover_selection = value; }
 446                 }
 447
 448                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
 449                 [Localizable (true)]
 450                 [MergableProperty (false)]
 451                 public ListViewItemCollection Items {
 452                         get { return items; }
 453                 }
 454
 455                 [DefaultValue (false)]
 456                 public bool LabelEdit {
 457                         get { return label_edit; }
 458                         set { label_edit = value; }
 459                 }
 460
 461                 [DefaultValue (true)]
 462                 [Localizable (true)]
 463                 public bool LabelWrap {
 464                         get { return label_wrap; }
 465                         set {
 466                                 if (label_wrap != value) {
 467                                         label_wrap = value;
 468                                         this.Redraw (true);
 469                                 }
 470                         }
 471                 }
 472
 473                 [DefaultValue (null)]
 474                 public ImageList LargeImageList {
 475                         get { return large_image_list; }
 476                         set {
 477                                 large_image_list = value;
 478                                 this.Redraw (true);
 479                         }
 480                 }
 481
 482                 [Browsable (false)]
 483                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 484                 public IComparer ListViewItemSorter {
 485                         get {
 486                                 if (View != View.SmallIcon && View != View.LargeIcon && item_sorter is ItemComparer)
 487                                         return null;
 488                                 return item_sorter;
 489                         }
 490                         set {
 491                                 if (item_sorter != value) {
 492                                         item_sorter = value;
 493                                         Sort ();
 494                                 }
 495                         }
 496                 }
 497
 498                 [DefaultValue (true)]
 499                 public bool MultiSelect {
 500                         get { return multiselect; }
 501                         set { multiselect = value; }
 502                 }
 503
 504                 [DefaultValue (true)]
 505                 public bool Scrollable {
 506                         get { return scrollable; }
 507                         set {
 508                                 if (scrollable != value) {
 509                                         scrollable = value;
 510                                         this.Redraw (true);
 511                                 }
 512                         }
 513                 }
 514
 515                 [Browsable (false)]
 516                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 517                 public SelectedIndexCollection SelectedIndices {
 518                         get { return selected_indices; }
 519                 }
 520
 521                 [Browsable (false)]
 522                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 523                 public SelectedListViewItemCollection SelectedItems {
 524                         get { return selected_items; }
 525                 }
 526
 527 #if NET_2_0
 528                 [DefaultValue(true)]
 529                 public bool ShowGroups {
 530                         get { return show_groups; }
 531                         set
 532                         {
 533                                 if (show_groups != value)
 534                                 {
 535                                         show_groups = value;
 536                                         Redraw(true);
 537                                 }
 538                         }
 539                 }
 540
 541                 [LocalizableAttribute(true)]
 542                 public ListViewGroupCollection Groups {
 543                         get { return groups;    }
 544                 }
 545 #endif
 546
 547                 [DefaultValue (null)]
 548                 public ImageList SmallImageList {
 549                         get { return small_image_list; }
 550                         set {
 551                                 small_image_list = value;
 552                                 this.Redraw (true);
 553                         }
 554                 }
 555
 556                 [DefaultValue (SortOrder.None)]
 557                 public SortOrder Sorting {
 558                         get { return sort_order; }
 559                         set {
 560                                 if (!Enum.IsDefined (typeof (SortOrder), value)) {
 561                                         throw new InvalidEnumArgumentException ("value", (int) value,
 562                                                 typeof (SortOrder));
 563                                 }
 564
 565                                 if (sort_order == value)
 566                                         return;
 567
 568                                 sort_order = value;
 569
 570                                 if (value == SortOrder.None) {
 571                                         if (item_sorter != null) {
 572                                                 // ListViewItemSorter should never be reset for SmallIcon
 573                                                 // and LargeIcon view
 574                                                 if (View != View.SmallIcon && View != View.LargeIcon)
 575 #if NET_2_0
 576                                                         item_sorter = null;
 577 #else
 578                                                         // in .NET 1.1, only internal IComparer would be
 579                                                         // set to null
 580                                                         if (item_sorter is ItemComparer)
 581                                                                 item_sorter = null;
 582 #endif
 583                                         }
 584                                         this.Redraw (false);
 585                                 } else {
 586                                         if (item_sorter == null)
 587                                                 item_sorter = new ItemComparer (value);
 588                                         if (item_sorter is ItemComparer) {
 589 #if NET_2_0
 590                                                 item_sorter = new ItemComparer (value);
 591 #else
 592                                                 // in .NET 1.1, the sort order is not updated for
 593                                                 // SmallIcon and LargeIcon views if no custom IComparer
 594                                                 // is set
 595                                                 if (View != View.SmallIcon && View != View.LargeIcon)
 596                                                         item_sorter = new ItemComparer (value);
 597 #endif
 598                                         }
 599                                         Sort ();
 600                                 }
 601                         }
 602                 }
 603
 604                 [DefaultValue (null)]
 605                 public ImageList StateImageList {
 606                         get { return state_image_list; }
 607                         set {
 608                                 state_image_list = value;
 609                                 this.Redraw (true);
 610                         }
 611                 }
 612
 613                 [Bindable (false)]
 614                 [Browsable (false)]
 615                 [EditorBrowsable (EditorBrowsableState.Never)]
 616                 public override string Text {
 617                         get { return base.Text; }
 618                         set {
 619                                 if (value == base.Text)
 620                                         return;
 621
 622                                 base.Text = value;
 623                                 this.Redraw (true);
 624                         }
 625                 }
 626
 627 #if NET_2_0
 628                 public Size TileSize {
 629                         get {
 630                                 return tile_size;
 631                         }
 632                         set {
 633                                 if (value.Width <= 0 || value.Height <= 0)
 634                                         throw new ArgumentOutOfRangeException ("value");
 635
 636                                 tile_size = value;
 637                                 Redraw (true);
 638                         }
 639                 }
 640 #endif
 641
 642                 [Browsable (false)]
 643                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 644                 public ListViewItem TopItem {
 645                         get {
 646                                 // there is no item
 647                                 if (this.items.Count == 0)
 648                                         return null;
 649                                 // if contents are not scrolled
 650                                 // it is the first item
 651                                 else if (h_marker == 0 && v_marker == 0)
 652                                         return this.items [0];
 653                                 // do a hit test for the scrolled position
 654                                 else {
 655                                         foreach (ListViewItem item in this.items) {
 656                                                 if (item.Bounds.X >= 0 && item.Bounds.Y >= 0)
 657                                                         return item;
 658                                         }
 659                                         return null;
 660                                 }
 661                         }
 662                 }
 663
 664 #if NET_2_0
 665                 [MonoTODO("Implement")]
 666                 public bool UseCompatibleStateImageBehavior {
 667                         get {
 668                                 return false;
 669                         }
 670
 671                         set {
 672                         }
 673                 }
 674 #endif
 675
 676                 [DefaultValue (View.LargeIcon)]
 677                 public View View {
 678                         get { return view; }
 679                         set {
 680                                 if (!Enum.IsDefined (typeof (View), value))
 681                                         throw new InvalidEnumArgumentException ("value", (int) value,
 682                                                 typeof (View));
 683
 684                                 if (view != value) {
 685 #if NET_2_0
 686                                         if (CheckBoxes && value == View.Tile)
 687                                                 throw new NotSupportedException ("CheckBoxes are not"
 688                                                         + " supported in Tile view. Choose a different"
 689                                                         + " view or set CheckBoxes to false.");
 690 #endif
 691
 692                                         h_scroll.Value = v_scroll.Value = 0;
 693                                         view = value;
 694                                         Redraw (true);
 695                                 }
 696                         }
 697                 }
 698                 #endregion      // Public Instance Properties
 699
 700                 #region Internal Methods Properties
 701
 702                 internal int FirstVisibleIndex {
 703                         get {
 704                                 // there is no item
 705                                 if (this.items.Count == 0)
 706                                         return 0;
 707
 708                                 if (h_marker == 0 && v_marker == 0)
 709                                         return 0;
 710
 711                                 foreach (ListViewItem item in this.items) {
 712                                         if (item.Bounds.Right >= 0 && item.Bounds.Bottom >= 0)
 713                                                 return item.Index;
 714                                 }
 715                                 return 0;
 716
 717                         }
 718                 }
 719
 720
 721                 internal int LastVisibleIndex {
 722                         get {
 723                                 for (int i = FirstVisibleIndex; i < Items.Count; i++) {
 724                                         if (View == View.List || Alignment == ListViewAlignment.Left) {
 725                                                 if (Items[i].Bounds.X > ClientRectangle.Right)
 726                                                         return i - 1;
 727                                         } else {
 728                                                 if (Items[i].Bounds.Y > ClientRectangle.Bottom)
 729                                                         return i - 1;
 730                                         }
 731                                 }
 732
 733                                 return Items.Count - 1;
 734                         }
 735                 }
 736
 737                 internal void OnSelectedIndexChanged ()
 738                 {
 739                         if (IsHandleCreated)
 740                                 OnSelectedIndexChanged (EventArgs.Empty);
 741                 }
 742
 743                 internal int TotalWidth {
 744                         get { return Math.Max (this.Width, this.layout_wd); }
 745                 }
 746
 747                 internal int TotalHeight {
 748                         get { return Math.Max (this.Height, this.layout_ht); }
 749                 }
 750
 751                 internal void Redraw (bool recalculate)
 752                 {
 753                         // Avoid calculations when control is being updated
 754                         if (this.updating)
 755                                 return;
 756
 757                         if (recalculate)
 758                                 CalculateListView (this.alignment);
 759
 760                         Refresh ();
 761                 }
 762
 763                 const int text_padding = 5;
 764
 765                 internal Size GetChildColumnSize (int index)
 766                 {
 767                         Size ret_size = Size.Empty;
 768                         ColumnHeader col = this.columns [index];
 769
 770                         if (col.Width == -2) { // autosize = max(items, columnheader)
 771                                 Size size = Size.Ceiling (this.DeviceContext.MeasureString
 772                                                           (col.Text, this.Font));
 773                                 size.Width += text_padding;
 774                                 ret_size = BiggestItem (index);
 775                                 if (size.Width > ret_size.Width)
 776                                         ret_size = size;
 777                         }
 778                         else { // -1 and all the values < -2 are put under one category
 779                                 ret_size = BiggestItem (index);
 780                                 // fall back to empty columns' width if no subitem is available for a column
 781                                 if (ret_size.IsEmpty) {
 782                                         ret_size.Width = ThemeEngine.Current.ListViewEmptyColumnWidth;
 783                                         if (col.Text.Length > 0)
 784                                                 ret_size.Height = Size.Ceiling (this.DeviceContext.MeasureString
 785                                                                                 (col.Text, this.Font)).Height;
 786                                         else
 787                                                 ret_size.Height = this.Font.Height;
 788                                 }
 789                         }
 790
 791                         ret_size.Height += text_padding;
 792
 793                         // adjust the size for icon and checkbox for 0th column
 794                         if (index == 0) {
 795                                 ret_size.Width += (this.CheckBoxSize.Width + 4);
 796                                 if (this.small_image_list != null)
 797                                         ret_size.Width += this.small_image_list.ImageSize.Width;
 798                         }
 799                         return ret_size;
 800                 }
 801
 802                 // Returns the size of biggest item text in a column.
 803                 private Size BiggestItem (int col)
 804                 {
 805                         Size temp = Size.Empty;
 806                         Size ret_size = Size.Empty;
 807
 808                         // 0th column holds the item text, we check the size of
 809                         // the various subitems falling in that column and get
 810                         // the biggest one's size.
 811                         foreach (ListViewItem item in items) {
 812                                 if (col >= item.SubItems.Count)
 813                                         continue;
 814
 815                                 temp = Size.Ceiling (this.DeviceContext.MeasureString
 816                                                      (item.SubItems [col].Text, this.Font));
 817                                 if (temp.Width > ret_size.Width)
 818                                         ret_size = temp;
 819                         }
 820
 821                         // adjustment for space
 822                         if (!ret_size.IsEmpty)
 823                                 ret_size.Width += 4;
 824
 825                         return ret_size;
 826                 }
 827
 828                 const int max_wrap_padding = 38;
 829
 830                 // Sets the size of the biggest item text as per the view
 831                 private void CalcTextSize ()
 832                 {
 833                         // clear the old value
 834                         text_size = Size.Empty;
 835
 836                         if (items.Count == 0)
 837                                 return;
 838
 839                         text_size = BiggestItem (0);
 840
 841                         if (view == View.LargeIcon && this.label_wrap) {
 842                                 Size temp = Size.Empty;
 843                                 if (this.check_boxes)
 844                                         temp.Width += 2 * this.CheckBoxSize.Width;
 845                                 int icon_w = LargeImageList == null ? 12 : LargeImageList.ImageSize.Width;
 846                                 temp.Width += icon_w + max_wrap_padding;
 847                                 // wrapping is done for two lines only
 848                                 if (text_size.Width > temp.Width) {
 849                                         text_size.Width = temp.Width;
 850                                         text_size.Height *= 2;
 851                                 }
 852                         }
 853                         else if (view == View.List) {
 854                                 // in list view max text shown in determined by the
 855                                 // control width, even if scolling is enabled.
 856                                 int max_wd = this.Width - (this.CheckBoxSize.Width - 2);
 857                                 if (this.small_image_list != null)
 858                                         max_wd -= this.small_image_list.ImageSize.Width;
 859
 860                                 if (text_size.Width > max_wd)
 861                                         text_size.Width = max_wd;
 862                         }
 863
 864                         // we do the default settings, if we have got 0's
 865                         if (text_size.Height <= 0)
 866                                 text_size.Height = this.Font.Height;
 867                         if (text_size.Width <= 0)
 868                                 text_size.Width = this.Width;
 869
 870                         // little adjustment
 871                         text_size.Width += 4;
 872                         text_size.Height += 2;
 873                 }
 874
 875                 private void Scroll (ScrollBar scrollbar, int delta)
 876                 {
 877                         if (delta == 0 || !scrollbar.Visible)
 878                                 return;
 879
 880                         int max;
 881                         if (scrollbar == h_scroll)
 882                                 max = h_scroll.Maximum - item_control.Width;
 883                         else
 884                                 max = v_scroll.Maximum - item_control.Height;
 885
 886                         int val = scrollbar.Value + delta;
 887                         if (val > max)
 888                                 val = max;
 889                         else if (val < scrollbar.Minimum)
 890                                 val = scrollbar.Minimum;
 891                         scrollbar.Value = val;
 892                 }
 893
 894                 private void CalculateScrollBars ()
 895                 {
 896                         Rectangle client_area = ClientRectangle;
 897
 898                         if (!this.scrollable || this.items.Count <= 0) {
 899                                 h_scroll.Visible = false;
 900                                 v_scroll.Visible = false;
 901                                 item_control.Location = new Point (0, header_control.Height);
 902                                 item_control.Height = ClientRectangle.Width - header_control.Height;
 903                                 item_control.Width = ClientRectangle.Width;
 904                                 header_control.Width = ClientRectangle.Width;
 905                                 return;
 906                         }
 907
 908                         // Don't calculate if the view is not displayable
 909                         if (client_area.Height < 0 || client_area.Width < 0)
 910                                 return;
 911
 912                         // making a scroll bar visible might make
 913                         // other scroll bar visible
 914                         if (layout_wd > client_area.Right) {
 915                                 h_scroll.Visible = true;
 916                                 if ((layout_ht + h_scroll.Height) > client_area.Bottom)
 917                                         v_scroll.Visible = true;
 918                                 else
 919                                         v_scroll.Visible = false;
 920                         } else if (layout_ht > client_area.Bottom) {
 921                                 v_scroll.Visible = true;
 922                                 if ((layout_wd + v_scroll.Width) > client_area.Right)
 923                                         h_scroll.Visible = true;
 924                                 else
 925                                         h_scroll.Visible = false;
 926                         } else {
 927                                 h_scroll.Visible = false;
 928                                 v_scroll.Visible = false;
 929                         }
 930
 931                         item_control.Height = ClientRectangle.Height - header_control.Height;
 932
 933                         if (h_scroll.is_visible) {
 934                                 h_scroll.Location = new Point (client_area.X, client_area.Bottom - h_scroll.Height);
 935                                 h_scroll.Minimum = 0;
 936
 937                                 // if v_scroll is visible, adjust the maximum of the
 938                                 // h_scroll to account for the width of v_scroll
 939                                 if (v_scroll.Visible) {
 940                                         h_scroll.Maximum = layout_wd + v_scroll.Width;
 941                                         h_scroll.Width = client_area.Width - v_scroll.Width;
 942                                 }
 943                                 else {
 944                                         h_scroll.Maximum = layout_wd;
 945                                         h_scroll.Width = client_area.Width;
 946                                 }
 947
 948                                 h_scroll.LargeChange = client_area.Width;
 949                                 h_scroll.SmallChange = Font.Height;
 950                                 item_control.Height -= h_scroll.Height;
 951                         }
 952
 953                         if (header_control.is_visible)
 954                                 header_control.Width = ClientRectangle.Width;
 955                         item_control.Width = ClientRectangle.Width;
 956
 957                         if (v_scroll.is_visible) {
 958                                 v_scroll.Location = new Point (client_area.Right - v_scroll.Width, client_area.Y);
 959                                 v_scroll.Minimum = 0;
 960
 961                                 // if h_scroll is visible, adjust the maximum of the
 962                                 // v_scroll to account for the height of h_scroll
 963                                 if (h_scroll.Visible) {
 964                                         v_scroll.Maximum = layout_ht + h_scroll.Height;
 965                                         v_scroll.Height = client_area.Height; // - h_scroll.Height already done
 966                                 } else {
 967                                         v_scroll.Maximum = layout_ht;
 968                                         v_scroll.Height = client_area.Height;
 969                                 }
 970
 971                                 v_scroll.LargeChange = client_area.Height;
 972                                 v_scroll.SmallChange = Font.Height;
 973                                 if (header_control.Visible)
 974                                         header_control.Width -= v_scroll.Width;
 975                                 item_control.Width -= v_scroll.Width;
 976                         }
 977                 }
 978
 979                 ColumnHeader GetReorderedColumn (int index)
 980                 {
 981                         if (reordered_column_indices == null)
 982                                 return Columns [index];
 983                         else
 984                                 return Columns [reordered_column_indices [index]];
 985                 }
 986
 987                 void ReorderColumn (ColumnHeader col, int index)
 988                 {
 989 #if NET_2_0
 990                         ColumnReorderedEventHandler eh = (ColumnReorderedEventHandler) (Events [ColumnReorderedEvent]);
 991                         if (eh != null){
 992                                 ColumnReorderedEventArgs args = new ColumnReorderedEventArgs (col.Index, index, col);
 993
 994                                 eh (this, args);
 995                                 if (args.Cancel){
 996                                         header_control.Invalidate ();
 997                                         item_control.Invalidate ();
 998                                         return;
 999                                 }
1000                         }
1001 #endif
1002                         if (reordered_column_indices == null) {
1003                                 reordered_column_indices = new int [Columns.Count];
1004                                 for (int i = 0; i < Columns.Count; i++)
1005                                         reordered_column_indices [i] = i;
1006                         }
1007
1008                         if (reordered_column_indices [index] == col.Index)
1009                                 return;
1010
1011                         int[] curr = reordered_column_indices;
1012                         int[] result = new int [Columns.Count];
1013                         int curr_idx = 0;
1014                         for (int i = 0; i < Columns.Count; i++) {
1015                                 if (curr_idx < Columns.Count && curr [curr_idx] == col.Index)
1016                                         curr_idx++;
1017
1018                                 if (i == index)
1019                                         result [i] = col.Index;
1020                                 else
1021                                         result [i] = curr [curr_idx++];
1022                         }
1023
1024                         reordered_column_indices = result;
1025                         LayoutDetails ();
1026                         header_control.Invalidate ();
1027                         item_control.Invalidate ();
1028                 }
1029
1030                 Size LargeIconItemSize {
1031                         get {
1032                                 int image_w = LargeImageList == null ? 12 : LargeImageList.ImageSize.Width;
1033                                 int image_h = LargeImageList == null ? 2 : LargeImageList.ImageSize.Height;
1034                                 int w = CheckBoxSize.Width + 2 + Math.Max (text_size.Width, image_w);
1035                                 int h = text_size.Height + 2 + Math.Max (CheckBoxSize.Height, image_h);
1036                                 return new Size (w, h);
1037                         }
1038                 }
1039
1040                 Size SmallIconItemSize {
1041                         get {
1042                                 int image_w = SmallImageList == null ? 0 : SmallImageList.ImageSize.Width;
1043                                 int image_h = SmallImageList == null ? 0 : SmallImageList.ImageSize.Height;
1044                                 int w = text_size.Width + 2 + CheckBoxSize.Width + image_w;
1045                                 int h = Math.Max (text_size.Height, Math.Max (CheckBoxSize.Height, image_h));
1046                                 return new Size (w, h);
1047                         }
1048                 }
1049
1050 #if NET_2_0
1051                 Size TileItemSize {
1052                         get {
1053                                 // Calculate tile size if needed
1054                                 // It appears that using Font.Size instead of a SizeF value can give us
1055                                 // a slightly better approach to the proportions defined in .Net
1056                                 if (tile_size == Size.Empty) {
1057                                         int image_w = LargeImageList == null ? 0 : LargeImageList.ImageSize.Width;
1058                                         int image_h = LargeImageList == null ? 0 : LargeImageList.ImageSize.Height;
1059                                         int w = (int)Font.Size * ThemeEngine.Current.ListViewTileWidthFactor + image_w + 4;
1060                                         int h = Math.Max ((int)Font.Size * ThemeEngine.Current.ListViewTileHeightFactor, image_h);
1061
1062                                         tile_size = new Size (w, h);
1063                                 }
1064
1065                                 return tile_size;
1066                         }
1067                 }
1068 #endif
1069
1070                 int rows;
1071                 int cols;
1072                 ListViewItem[,] item_matrix;
1073
1074                 void LayoutIcons (Size item_size, bool left_aligned, int x_spacing, int y_spacing)
1075                 {
1076                         header_control.Visible = false;
1077                         header_control.Size = Size.Empty;
1078                         item_control.Visible = true;
1079                         item_control.Location = Point.Empty;
1080
1081                         if (items.Count == 0)
1082                                 return;
1083
1084                         Size sz = item_size;
1085                         Rectangle area = ClientRectangle;
1086
1087                         if (left_aligned) {
1088                                 rows = (int) Math.Floor ((double)(area.Height - h_scroll.Height + y_spacing) / (double)(sz.Height + y_spacing));
1089                                 if (rows <= 0)
1090                                         rows = 1;
1091                                 cols = (int) Math.Ceiling ((double)items.Count / (double)rows);
1092                         } else {
1093                                 cols = (int) Math.Floor ((double)(area.Width - v_scroll.Width + x_spacing) / (double)(sz.Width + x_spacing));
1094                                 if (cols <= 0)
1095                                         cols = 1;
1096                                 rows = (int) Math.Ceiling ((double)items.Count / (double)cols);
1097                         }
1098
1099                         layout_ht = rows * (sz.Height + y_spacing) - y_spacing;
1100                         layout_wd = cols * (sz.Width + x_spacing) - x_spacing;
1101                         item_matrix = new ListViewItem [rows, cols];
1102                         int row = 0;
1103                         int col = 0;
1104                         foreach (ListViewItem item in items) {
1105                                 int x = col * (sz.Width + x_spacing);
1106                                 int y = row * (sz.Height + y_spacing);
1107                                 item.Location = new Point (x, y);
1108                                 item.Layout ();
1109                                 item.row = row;
1110                                 item.col = col;
1111                                 item_matrix [row, col] = item;
1112                                 if (left_aligned) {
1113                                         if (++row == rows) {
1114                                                 row = 0;
1115                                                 col++;
1116                                         }
1117                                 } else {
1118                                         if (++col == cols) {
1119                                                 col = 0;
1120                                                 row++;
1121                                         }
1122                                 }
1123                         }
1124
1125                         item_control.Size = new Size (layout_wd, layout_ht);
1126                 }
1127
1128                 void LayoutHeader ()
1129                 {
1130                         int x = 0;
1131                         for (int i = 0; i < Columns.Count; i++) {
1132                                 ColumnHeader col = GetReorderedColumn (i);
1133                                 col.X = x;
1134                                 col.Y = 0;
1135                                 col.CalcColumnHeader ();
1136                                 x += col.Wd;
1137                         }
1138
1139                         if (x < ClientRectangle.Width)
1140                                 x = ClientRectangle.Width;
1141
1142                         if (header_style == ColumnHeaderStyle.None) {
1143                                 header_control.Visible = false;
1144                                 header_control.Size = Size.Empty;
1145                         } else {
1146                                 header_control.Width = x;
1147                                 header_control.Height = columns [0].Ht;
1148                                 header_control.Visible = true;
1149                         }
1150                 }
1151
1152                 void LayoutDetails ()
1153                 {
1154                         if (columns.Count == 0) {
1155                                 header_control.Visible = false;
1156                                 item_control.Visible = false;
1157                                 return;
1158                         }
1159
1160                         LayoutHeader ();
1161
1162                         item_control.Visible = true;
1163                         item_control.Location = new Point (0, header_control.Height);
1164
1165                         int y = 0;
1166                         if (items.Count > 0) {
1167                                 foreach (ListViewItem item in items) {
1168                                         item.Layout ();
1169                                         item.Location = new Point (0, y);
1170                                         y += item.Bounds.Height + 2;
1171                                 }
1172
1173                                 // some space for bottom gridline
1174                                 if (grid_lines)
1175                                         y += 2;
1176                         }
1177
1178                         layout_wd = Math.Max (header_control.Width, item_control.Width);
1179                         layout_ht = y + header_control.Height;
1180                 }
1181
1182                 private void CalculateListView (ListViewAlignment align)
1183                 {
1184                         CalcTextSize ();
1185
1186                         switch (view) {
1187                         case View.Details:
1188                                 LayoutDetails ();
1189                                 break;
1190
1191                         case View.SmallIcon:
1192                                 LayoutIcons (SmallIconItemSize, alignment == ListViewAlignment.Left, 4, 2);
1193                                 break;
1194
1195                         case View.LargeIcon:
1196                                 LayoutIcons (LargeIconItemSize, alignment == ListViewAlignment.Left,
1197                                              ThemeEngine.Current.ListViewHorizontalSpacing,
1198                                              ThemeEngine.Current.ListViewVerticalSpacing);
1199                                 break;
1200
1201                         case View.List:
1202                                 LayoutIcons (SmallIconItemSize, true, 4, 2);
1203                                 break;
1204 #if NET_2_0
1205                         case View.Tile:
1206                                 LayoutIcons (TileItemSize, alignment == ListViewAlignment.Left,
1207                                                 ThemeEngine.Current.ListViewHorizontalSpacing,
1208                                                 ThemeEngine.Current.ListViewVerticalSpacing);
1209                                 break;
1210 #endif
1211                         }
1212
1213                         CalculateScrollBars ();
1214                 }
1215
1216                 private bool KeySearchString (KeyEventArgs ke)
1217                 {
1218                         int current_tickcnt = Environment.TickCount;
1219                         if (keysearch_tickcnt > 0 && current_tickcnt - keysearch_tickcnt > keysearch_keydelay) {
1220                                 keysearch_text = string.Empty;
1221                         }
1222
1223                         keysearch_text += (char) ke.KeyData;
1224                         keysearch_tickcnt = current_tickcnt;
1225
1226                         int start = FocusedItem == null ? 0 : FocusedItem.Index;
1227                         int i = start;
1228                         while (true) {
1229                                 if (CultureInfo.CurrentCulture.CompareInfo.IsPrefix (Items[i].Text, keysearch_text,
1230                                         CompareOptions.IgnoreCase)) {
1231                                         SetFocusedItem (Items [i]);
1232                                         items [i].Selected = true;
1233                                         EnsureVisible (i);
1234                                         break;
1235                                 }
1236                                 i = (i + 1  < Items.Count) ? i+1 : 0;
1237
1238                                 if (i == start)
1239                                         break;
1240                         }
1241                         return true;
1242                 }
1243
1244                 int GetAdjustedIndex (Keys key)
1245                 {
1246                         int result = -1;
1247
1248                         if (View == View.Details) {
1249                                 if (key == Keys.Up)
1250                                         result = FocusedItem.Index - 1;
1251                                 else if (key == Keys.Down) {
1252                                         result = FocusedItem.Index + 1;
1253                                         if (result == items.Count)
1254                                                 result = -1;
1255                                 }
1256                                 return result;
1257                         }
1258
1259                         int row = FocusedItem.row;
1260                         int col = FocusedItem.col;
1261
1262                         switch (key) {
1263                         case Keys.Left:
1264                                 if (col == 0)
1265                                         return -1;
1266                                 return item_matrix [row, col - 1].Index;
1267
1268                         case Keys.Right:
1269                                 if (col == (cols - 1))
1270                                         return -1;
1271                                 while (item_matrix [row, col + 1] == null) {
1272                                         row--;
1273                                         if (row < 0)
1274                                                 return -1;
1275                                 }
1276                                 return item_matrix [row, col + 1].Index;
1277
1278                         case Keys.Up:
1279                                 if (row == 0)
1280                                         return -1;
1281                                 return item_matrix [row - 1, col].Index;
1282
1283                         case Keys.Down:
1284                                 if (row == (rows - 1) || row == Items.Count - 1)
1285                                         return -1;
1286                                 while (item_matrix [row + 1, col] == null) {
1287                                         col--;
1288                                         if (col < 0)
1289                                                 return -1;
1290                                 }
1291                                 return item_matrix [row + 1, col].Index;
1292
1293                         default:
1294                                 return -1;
1295                         }
1296                 }
1297
1298                 ListViewItem selection_start;
1299
1300                 private bool SelectItems (ArrayList sel_items)
1301                 {
1302                         bool changed = false;
1303                         ArrayList curr_items = SelectedItems.List;
1304                         foreach (ListViewItem item in curr_items)
1305                                 if (!sel_items.Contains (item)) {
1306                                         item.Selected = false;
1307                                         changed = true;
1308                                 }
1309                         foreach (ListViewItem item in sel_items)
1310                                 if (!item.Selected) {
1311                                         item.Selected = true;
1312                                         changed = true;
1313                                 }
1314                         return changed;
1315                 }
1316
1317                 private void UpdateMultiSelection (int index)
1318                 {
1319                         bool shift_pressed = (XplatUI.State.ModifierKeys & Keys.Shift) != 0;
1320                         bool ctrl_pressed = (XplatUI.State.ModifierKeys & Keys.Control) != 0;
1321                         ListViewItem item = items [index];
1322
1323                         if (shift_pressed && selection_start != null) {
1324                                 ArrayList list = new ArrayList ();
1325                                 int start = Math.Min (selection_start.Index, index);
1326                                 int end = Math.Max (selection_start.Index, index);
1327                                 if (View == View.Details) {
1328                                         for (int i = start; i <= end; i++)
1329                                                 list.Add (items [i]);
1330                                 } else {
1331                                         int left = Math.Min (items [start].col, items [end].col);
1332                                         int right = Math.Max (items [start].col, items [end].col);
1333                                         int top = Math.Min (items [start].row, items [end].row);
1334                                         int bottom = Math.Max (items [start].row, items [end].row);
1335                                         foreach (ListViewItem curr in items)
1336                                                 if (curr.row >= top && curr.row <= bottom &&
1337                                                     curr.col >= left && curr.col <= right)
1338                                                         list.Add (curr);
1339                                 }
1340                                 if (SelectItems (list))
1341                                         OnSelectedIndexChanged (EventArgs.Empty);
1342                         } else  if (ctrl_pressed) {
1343                                 item.Selected = !item.Selected;
1344                                 selection_start = item;
1345                                 OnSelectedIndexChanged (EventArgs.Empty);
1346                         } else {
1347                                 SelectedItems.Clear ();
1348                                 item.Selected = true;
1349                                 selection_start = item;
1350                                 OnSelectedIndexChanged (EventArgs.Empty);
1351                         }
1352                 }
1353
1354                 internal override bool InternalPreProcessMessage (ref Message msg)
1355                 {
1356                         if (msg.Msg == (int)Msg.WM_KEYDOWN) {
1357                                 Keys key_data = (Keys)msg.WParam.ToInt32();
1358                                 if (HandleNavKeys (key_data))
1359                                         return true;
1360                         }
1361                         return base.InternalPreProcessMessage (ref msg);
1362                 }
1363
1364                 bool HandleNavKeys (Keys key_data)
1365                 {
1366                         if (Items.Count == 0 || !item_control.Visible)
1367                                 return false;
1368
1369                         if (FocusedItem == null)
1370                                 SetFocusedItem (Items [0]);
1371
1372                         switch (key_data) {
1373                         case Keys.End:
1374                                 SelectIndex (Items.Count - 1);
1375                                 break;
1376
1377                         case Keys.Home:
1378                                 SelectIndex (0);
1379                                 break;
1380
1381                         case Keys.Left:
1382                         case Keys.Right:
1383                         case Keys.Up:
1384                         case Keys.Down:
1385                                 SelectIndex (GetAdjustedIndex (key_data));
1386                                 break;
1387
1388                         default:
1389                                 return false;
1390                         }
1391
1392                         return true;
1393                 }
1394
1395                 void SelectIndex (int index)
1396                 {
1397                         if (index == -1)
1398                                 return;
1399
1400                         if (MultiSelect)
1401                                 UpdateMultiSelection (index);
1402                         else if (!items [index].Selected) {
1403                                 items [index].Selected = true;
1404                                 OnSelectedIndexChanged (EventArgs.Empty);
1405                         }
1406
1407                         SetFocusedItem (items [index]);
1408                         EnsureVisible (index);
1409                 }
1410
1411                 private void ListView_KeyDown (object sender, KeyEventArgs ke)
1412                 {
1413                         if (ke.Handled || Items.Count == 0 || !item_control.Visible)
1414                                 return;
1415
1416                         ke.Handled = KeySearchString (ke);
1417                 }
1418
1419                 private MouseEventArgs TranslateMouseEventArgs (MouseEventArgs args)
1420                 {
1421                         Point loc = PointToClient (Control.MousePosition);
1422                         return new MouseEventArgs (args.Button, args.Clicks, loc.X, loc.Y, args.Delta);
1423                 }
1424
1425                 internal class ItemControl : Control {
1426
1427                         ListView owner;
1428                         ListViewItem clicked_item;
1429                         ListViewItem last_clicked_item;
1430                         bool hover_processed = false;
1431                         bool checking = false;
1432
1433                         ListViewLabelEditTextBox edit_text_box;
1434                         internal ListViewItem edit_item;
1435                         LabelEditEventArgs edit_args;
1436
1437                         public ItemControl (ListView owner)
1438                         {
1439                                 this.owner = owner;
1440                                 DoubleClick += new EventHandler(ItemsDoubleClick);
1441                                 MouseDown += new MouseEventHandler(ItemsMouseDown);
1442                                 MouseMove += new MouseEventHandler(ItemsMouseMove);
1443                                 MouseHover += new EventHandler(ItemsMouseHover);
1444                                 MouseUp += new MouseEventHandler(ItemsMouseUp);
1445                         }
1446
1447                         void ItemsDoubleClick (object sender, EventArgs e)
1448                         {
1449                                 if (owner.activation == ItemActivation.Standard)
1450                                         owner.OnItemActivate (EventArgs.Empty);
1451                         }
1452
1453                         enum BoxSelect {
1454                                 None,
1455                                 Normal,
1456                                 Shift,
1457                                 Control
1458                         }
1459
1460                         BoxSelect box_select_mode = BoxSelect.None;
1461                         ArrayList prev_selection;
1462                         Point box_select_start;
1463
1464                         Rectangle box_select_rect;
1465                         internal Rectangle BoxSelectRectangle {
1466                                 get { return box_select_rect; }
1467                                 set {
1468                                         if (box_select_rect == value)
1469                                                 return;
1470
1471                                         InvalidateBoxSelectRect ();
1472                                         box_select_rect = value;
1473                                         InvalidateBoxSelectRect ();
1474                                 }
1475                         }
1476
1477                         void InvalidateBoxSelectRect ()
1478                         {
1479                                 if (BoxSelectRectangle.Size.IsEmpty)
1480                                         return;
1481
1482                                 Rectangle edge = BoxSelectRectangle;
1483                                 edge.X -= 1;
1484                                 edge.Y -= 1;
1485                                 edge.Width += 2;
1486                                 edge.Height = 2;
1487                                 Invalidate (edge);
1488                                 edge.Y = BoxSelectRectangle.Bottom - 1;
1489                                 Invalidate (edge);
1490                                 edge.Y = BoxSelectRectangle.Y - 1;
1491                                 edge.Width = 2;
1492                                 edge.Height = BoxSelectRectangle.Height + 2;
1493                                 Invalidate (edge);
1494                                 edge.X = BoxSelectRectangle.Right - 1;
1495                                 Invalidate (edge);
1496                         }
1497
1498                         private Rectangle CalculateBoxSelectRectangle (Point pt)
1499                         {
1500                                 int left = Math.Min (box_select_start.X, pt.X);
1501                                 int right = Math.Max (box_select_start.X, pt.X);
1502                                 int top = Math.Min (box_select_start.Y, pt.Y);
1503                                 int bottom = Math.Max (box_select_start.Y, pt.Y);
1504                                 return Rectangle.FromLTRB (left, top, right, bottom);
1505                         }
1506
1507                         ArrayList BoxSelectedItems {
1508                                 get {
1509                                         ArrayList result = new ArrayList ();
1510                                         foreach (ListViewItem item in owner.Items) {
1511                                                 Rectangle r = item.Bounds;
1512                                                 r.X += r.Width / 4;
1513                                                 r.Y += r.Height / 4;
1514                                                 r.Width /= 2;
1515                                                 r.Height /= 2;
1516                                                 if (BoxSelectRectangle.IntersectsWith (r))
1517                                                         result.Add (item);
1518                                         }
1519                                         return result;
1520                                 }
1521                         }
1522
1523                         private bool PerformBoxSelection (Point pt)
1524                         {
1525                                 if (box_select_mode == BoxSelect.None)
1526                                         return false;
1527
1528                                 BoxSelectRectangle = CalculateBoxSelectRectangle (pt);
1529
1530                                 ArrayList box_items = BoxSelectedItems;
1531
1532                                 ArrayList items;
1533
1534                                 switch (box_select_mode) {
1535
1536                                 case BoxSelect.Normal:
1537                                         items = box_items;
1538                                         break;
1539
1540                                 case BoxSelect.Control:
1541                                         items = new ArrayList ();
1542                                         foreach (ListViewItem item in prev_selection)
1543                                                 if (!box_items.Contains (item))
1544                                                         items.Add (item);
1545                                         foreach (ListViewItem item in box_items)
1546                                                 if (!prev_selection.Contains (item))
1547                                                         items.Add (item);
1548                                         break;
1549
1550                                 case BoxSelect.Shift:
1551                                         items = box_items;
1552                                         foreach (ListViewItem item in box_items)
1553                                                 prev_selection.Remove (item);
1554                                         foreach (ListViewItem item in prev_selection)
1555                                                 items.Add (item);
1556                                         break;
1557
1558                                 default:
1559                                         throw new Exception ("Unexpected Selection mode: " + box_select_mode);
1560                                 }
1561
1562                                 SuspendLayout ();
1563                                 owner.SelectItems (items);
1564                                 ResumeLayout ();
1565
1566                                 return true;
1567                         }
1568
1569                         private void ToggleCheckState (ListViewItem item)
1570                         {
1571                                 CheckState curr_state = item.Checked ?  CheckState.Checked : CheckState.Unchecked;
1572                                 item.Checked = !item.Checked;
1573                                 CheckState new_state = item.Checked ?  CheckState.Checked : CheckState.Unchecked;
1574
1575                                 ItemCheckEventArgs ice = new ItemCheckEventArgs (item.Index, curr_state, new_state);
1576                                 owner.OnItemCheck (ice);
1577                         }
1578
1579                         private void ItemsMouseDown (object sender, MouseEventArgs me)
1580                         {
1581                                 if (owner.items.Count == 0) {
1582                                         owner.OnMouseDown (owner.TranslateMouseEventArgs (me));
1583                                         return;
1584                                 }
1585
1586                                 Point pt = new Point (me.X, me.Y);
1587                                 foreach (ListViewItem item in owner.items) {
1588                                         if (me.Clicks == 1 && item.CheckRectReal.Contains (pt)) {
1589                                                 checking = true;
1590                                                 ToggleCheckState (item);
1591                                                 owner.OnMouseDown (owner.TranslateMouseEventArgs (me));
1592                                                 return;
1593                                         }
1594
1595                                         if (owner.View == View.Details && !owner.FullRowSelect) {
1596                                                 if (item.GetBounds (ItemBoundsPortion.Label).Contains (pt)) {
1597                                                         clicked_item = item;
1598                                                         break;
1599                                                 }
1600                                         } else {
1601                                                 if (item.Bounds.Contains (pt)) {
1602                                                         clicked_item = item;
1603                                                         break;
1604                                                 }
1605                                         }
1606                                 }
1607
1608
1609                                 if (clicked_item != null) {
1610                                         owner.SetFocusedItem (clicked_item);
1611                                         bool changed = !clicked_item.Selected;
1612                                         if (owner.MultiSelect)
1613                                                 owner.UpdateMultiSelection (clicked_item.Index);
1614                                         else
1615                                                 clicked_item.Selected = true;
1616
1617                                         if (changed)
1618                                                 owner.OnSelectedIndexChanged (EventArgs.Empty);
1619
1620                                         // Raise double click if the item was clicked. On MS the
1621                                         // double click is only raised if you double click an item
1622                                         if (me.Clicks > 1) {
1623                                                 owner.OnDoubleClick (EventArgs.Empty);
1624                                                 if (owner.CheckBoxes)
1625                                                         ToggleCheckState (clicked_item);
1626                                         } else if (me.Clicks == 1) {
1627                                                 owner.OnClick (EventArgs.Empty);
1628                                                 if (owner.LabelEdit && !changed)
1629                                                         BeginEdit (clicked_item); // this is probably not the correct place to execute BeginEdit
1630                                         }
1631                                 } else {
1632                                         if (owner.MultiSelect) {
1633                                                 Keys mods = XplatUI.State.ModifierKeys;
1634                                                 if ((mods & Keys.Shift) != 0)
1635                                                         box_select_mode = BoxSelect.Shift;
1636                                                 else if ((mods & Keys.Control) != 0)
1637                                                         box_select_mode = BoxSelect.Control;
1638                                                 else
1639                                                         box_select_mode = BoxSelect.Normal;
1640                                                 box_select_start = pt;
1641                                                 prev_selection = owner.SelectedItems.List;
1642                                         } else if (owner.SelectedItems.Count > 0) {
1643                                                 owner.SelectedItems.Clear ();
1644                                                 owner.OnSelectedIndexChanged (EventArgs.Empty);
1645                                         }
1646                                 }
1647
1648                                 owner.OnMouseDown (owner.TranslateMouseEventArgs (me));
1649                         }
1650
1651                         private void ItemsMouseMove (object sender, MouseEventArgs me)
1652                         {
1653                                 bool done = PerformBoxSelection (new Point (me.X, me.Y));
1654
1655                                 if (!done && owner.HoverSelection && hover_processed) {
1656
1657                                         Point pt = PointToClient (Control.MousePosition);
1658                                         ListViewItem item = owner.GetItemAt (pt.X, pt.Y);
1659                                         if (item != null && !item.Selected) {
1660                                                 hover_processed = false;
1661                                                 XplatUI.ResetMouseHover (Handle);
1662                                         }
1663                                 }
1664
1665                                 owner.OnMouseMove (owner.TranslateMouseEventArgs (me));
1666                         }
1667
1668
1669                         private void ItemsMouseHover (object sender, EventArgs e)
1670                         {
1671                                 owner.OnMouseHover(e);
1672
1673                                 if (Capture || !owner.HoverSelection)
1674                                         return;
1675
1676                                 hover_processed = true;
1677                                 Point pt = PointToClient (Control.MousePosition);
1678                                 ListViewItem item = owner.GetItemAt (pt.X, pt.Y);
1679
1680                                 if (item == null)
1681                                         return;
1682
1683                                 item.Selected = true;
1684                                 owner.OnSelectedIndexChanged (new EventArgs ());
1685                         }
1686
1687                         private void ItemsMouseUp (object sender, MouseEventArgs me)
1688                         {
1689                                 Capture = false;
1690                                 if (owner.Items.Count == 0) {
1691                                         owner.OnMouseUp (owner.TranslateMouseEventArgs (me));
1692                                         return;
1693                                 }
1694
1695                                 Point pt = new Point (me.X, me.Y);
1696
1697                                 Rectangle rect = Rectangle.Empty;
1698                                 if (clicked_item != null) {
1699                                         if (owner.view == View.Details && !owner.full_row_select)
1700                                                 rect = clicked_item.GetBounds (ItemBoundsPortion.Label);
1701                                         else
1702                                                 rect = clicked_item.Bounds;
1703
1704                                         if (rect.Contains (pt)) {
1705                                                 switch (owner.activation) {
1706                                                 case ItemActivation.OneClick:
1707                                                         owner.OnItemActivate (EventArgs.Empty);
1708                                                         break;
1709
1710                                                 case ItemActivation.TwoClick:
1711                                                         if (last_clicked_item == clicked_item) {
1712                                                                 owner.OnItemActivate (EventArgs.Empty);
1713                                                                 last_clicked_item = null;
1714                                                         } else
1715                                                                 last_clicked_item = clicked_item;
1716                                                         break;
1717                                                 default:
1718                                                         // DoubleClick activation is handled in another handler
1719                                                         break;
1720                                                 }
1721                                         }
1722                                 } else if (!checking && owner.SelectedItems.Count > 0 && BoxSelectRectangle.Size.IsEmpty) {
1723                                         // Need this to clean up background clicks
1724                                         owner.SelectedItems.Clear ();
1725                                         owner.OnSelectedIndexChanged (EventArgs.Empty);
1726                                 }
1727
1728                                 clicked_item = null;
1729                                 box_select_start = Point.Empty;
1730                                 BoxSelectRectangle = Rectangle.Empty;
1731                                 prev_selection = null;
1732                                 box_select_mode = BoxSelect.None;
1733                                 checking = false;
1734                                 owner.OnMouseUp (owner.TranslateMouseEventArgs (me));
1735                         }
1736
1737                         internal void LabelEditFinished (object sender, EventArgs e)
1738                         {
1739                                 EndEdit (edit_item);
1740                         }
1741
1742                         internal void BeginEdit (ListViewItem item)
1743                         {
1744                                 if (edit_item != null)
1745                                         EndEdit (edit_item);
1746
1747                                 if (edit_text_box == null) {
1748                                         edit_text_box = new ListViewLabelEditTextBox ();
1749                                         edit_text_box.BorderStyle = BorderStyle.FixedSingle;
1750                                         edit_text_box.EditingFinished += new EventHandler (LabelEditFinished);
1751                                         edit_text_box.Visible = false;
1752                                         Controls.Add (edit_text_box);
1753                                 }
1754
1755                                 item.EnsureVisible();
1756
1757                                 edit_text_box.Reset ();
1758
1759                                 switch (owner.view) {
1760                                         case View.List:
1761                                         case View.SmallIcon:
1762                                         case View.Details:
1763                                                 edit_text_box.TextAlign = HorizontalAlignment.Left;
1764                                                 edit_text_box.Bounds = item.GetBounds (ItemBoundsPortion.Label);
1765                                                 SizeF sizef = DeviceContext.MeasureString (item.Text, item.Font);
1766                                                 edit_text_box.Width = (int)sizef.Width + 4;
1767                                                 edit_text_box.MaxWidth = owner.ClientRectangle.Width - edit_text_box.Bounds.X;
1768                                                 edit_text_box.WordWrap = false;
1769                                                 edit_text_box.Multiline = false;
1770                                                 break;
1771                                         case View.LargeIcon:
1772                                                 edit_text_box.TextAlign = HorizontalAlignment.Center;
1773                                                 edit_text_box.Bounds = item.GetBounds (ItemBoundsPortion.Label);
1774                                                 sizef = DeviceContext.MeasureString (item.Text, item.Font);
1775                                                 edit_text_box.Width = (int)sizef.Width + 4;
1776                                                 edit_text_box.MaxWidth = item.GetBounds(ItemBoundsPortion.Entire).Width;
1777                                                 edit_text_box.MaxHeight = owner.ClientRectangle.Height - edit_text_box.Bounds.Y;
1778                                                 edit_text_box.WordWrap = true;
1779                                                 edit_text_box.Multiline = true;
1780                                                 break;
1781                                 }
1782
1783                                 edit_text_box.Text = item.Text;
1784                                 edit_text_box.Font = item.Font;
1785                                 edit_text_box.Visible = true;
1786                                 edit_text_box.Focus ();
1787                                 edit_text_box.SelectAll ();
1788
1789                                 edit_args = new LabelEditEventArgs (owner.Items.IndexOf(edit_item));
1790                                 owner.OnBeforeLabelEdit (edit_args);
1791
1792                                 if (edit_args.CancelEdit)
1793                                         EndEdit (item);
1794
1795                                 edit_item = item;
1796                         }
1797
1798                         internal void EndEdit (ListViewItem item)
1799                         {
1800                                 if (edit_text_box != null && edit_text_box.Visible) {
1801                                         edit_text_box.Visible = false;
1802                                 }
1803
1804                                 if (edit_item != null && edit_item == item) {
1805                                         owner.OnAfterLabelEdit (edit_args);
1806
1807                                         if (!edit_args.CancelEdit) {
1808                                                 if (edit_args.Label != null)
1809                                                         edit_item.Text = edit_args.Label;
1810                                                 else
1811                                                         edit_item.Text = edit_text_box.Text;
1812                                         }
1813
1814                                 }
1815
1816
1817                                 edit_item = null;
1818                         }
1819
1820                         internal override void OnPaintInternal (PaintEventArgs pe)
1821                         {
1822                                 ThemeEngine.Current.DrawListViewItems (pe.Graphics, pe.ClipRectangle, owner);
1823                         }
1824
1825                         internal override void OnGotFocusInternal (EventArgs e)
1826                         {
1827                                 owner.Focus ();
1828                         }
1829                 }
1830
1831                 internal class ListViewLabelEditTextBox : TextBox
1832                 {
1833                         int max_width = -1;
1834                         int min_width = -1;
1835
1836                         int max_height = -1;
1837                         int min_height = -1;
1838
1839                         int old_number_lines = 1;
1840
1841                         SizeF text_size_one_char;
1842
1843                         public ListViewLabelEditTextBox ()
1844                         {
1845                                 min_height = DefaultSize.Height;
1846                                 text_size_one_char = DeviceContext.MeasureString ("B", Font);
1847                         }
1848
1849                         public int MaxWidth {
1850                                 set {
1851                                         if (value < min_width)
1852                                                 max_width = min_width;
1853                                         else
1854                                                 max_width = value;
1855                                 }
1856                         }
1857
1858                         public int MaxHeight {
1859                                 set {
1860                                         if (value < min_height)
1861                                                 max_height = min_height;
1862                                         else
1863                                                 max_height = value;
1864                                 }
1865                         }
1866
1867                         public new int Width {
1868                                 get {
1869                                         return base.Width;
1870                                 }
1871                                 set {
1872                                         min_width = value;
1873                                         base.Width = value;
1874                                 }
1875                         }
1876
1877                         public override Font Font {
1878                                 get {
1879                                         return base.Font;
1880                                 }
1881                                 set {
1882                                         base.Font = value;
1883                                         text_size_one_char = DeviceContext.MeasureString ("B", Font);
1884                                 }
1885                         }
1886
1887                         protected override void OnTextChanged (EventArgs e)
1888                         {
1889                                 SizeF text_size = DeviceContext.MeasureString (Text, Font);
1890
1891                                 int new_width = (int)text_size.Width + 8;
1892
1893                                 if (!Multiline)
1894                                         ResizeTextBoxWidth (new_width);
1895                                 else {
1896                                         if (Width != max_width)
1897                                                 ResizeTextBoxWidth (new_width);
1898
1899                                         int number_lines = Lines.Length;
1900
1901                                         if (number_lines != old_number_lines) {
1902                                                 int new_height = number_lines * (int)text_size_one_char.Height + 4;
1903                                                 old_number_lines = number_lines;
1904
1905                                                 ResizeTextBoxHeight (new_height);
1906                                         }
1907                                 }
1908
1909                                 base.OnTextChanged (e);
1910                         }
1911
1912                         protected override bool IsInputKey (Keys key_data)
1913                         {
1914                                 if ((key_data & Keys.Alt) == 0) {
1915                                         switch (key_data & Keys.KeyCode) {
1916                                                 case Keys.Enter:
1917                                                         return true;
1918                                         }
1919                                 }
1920                                 return base.IsInputKey (key_data);
1921                         }
1922
1923                         protected override void OnKeyDown (KeyEventArgs e)
1924                         {
1925                                 if (e.KeyCode == Keys.Return && Visible) {
1926                                         this.Visible = false;
1927                                         OnEditingFinished (e);
1928                                 }
1929                         }
1930
1931                         protected override void OnLostFocus (EventArgs e)
1932                         {
1933                                 if (Visible) {
1934                                         OnEditingFinished (e);
1935                                 }
1936                         }
1937
1938                         protected void OnEditingFinished (EventArgs e)
1939                         {
1940                                 EventHandler eh = (EventHandler)(Events [EditingFinishedEvent]);
1941                                 if (eh != null)
1942                                         eh (this, e);
1943                         }
1944
1945                         private void ResizeTextBoxWidth (int new_width)
1946                         {
1947                                 if (new_width > max_width)
1948                                         base.Width = max_width;
1949                                 else
1950                                 if (new_width >= min_width)
1951                                         base.Width = new_width;
1952                                 else
1953                                         base.Width = min_width;
1954                         }
1955
1956                         private void ResizeTextBoxHeight (int new_height)
1957                         {
1958                                 if (new_height > max_height)
1959                                         base.Height = max_height;
1960                                 else
1961                                 if (new_height >= min_height)
1962                                         base.Height = new_height;
1963                                 else
1964                                         base.Height = min_height;
1965                         }
1966
1967                         public void Reset ()
1968                         {
1969                                 max_width = -1;
1970                                 min_width = -1;
1971
1972                                 max_height = -1;
1973
1974                                 old_number_lines = 1;
1975
1976                                 Text = String.Empty;
1977
1978                                 Size = DefaultSize;
1979                         }
1980
1981                         static object EditingFinishedEvent = new object ();
1982                         public event EventHandler EditingFinished {
1983                                 add { Events.AddHandler (EditingFinishedEvent, value); }
1984                                 remove { Events.RemoveHandler (EditingFinishedEvent, value); }
1985                         }
1986                 }
1987
1988                 internal override void OnPaintInternal (PaintEventArgs pe)
1989                 {
1990                         if (updating)
1991                                 return;
1992
1993                         CalculateScrollBars ();
1994                 }
1995
1996                 void FocusChanged (object o, EventArgs args)
1997                 {
1998                         if (Items.Count == 0)
1999                                 return;
2000
2001                         if (FocusedItem == null)
2002                                 SetFocusedItem (Items [0]);
2003
2004                         item_control.Invalidate (FocusedItem.Bounds);
2005                 }
2006
2007                 private void ListView_MouseWheel (object sender, MouseEventArgs me)
2008                 {
2009                         if (Items.Count == 0)
2010                                 return;
2011
2012                         int lines = me.Delta / 120;
2013
2014                         if (lines == 0)
2015                                 return;
2016
2017                         switch (View) {
2018                         case View.Details:
2019                         case View.SmallIcon:
2020                                 Scroll (v_scroll, -Items [0].Bounds.Height * SystemInformation.MouseWheelScrollLines * lines);
2021                                 break;
2022                         case View.LargeIcon:
2023                                 Scroll (v_scroll, -(Items [0].Bounds.Height + ThemeEngine.Current.ListViewVerticalSpacing)  * lines);
2024                                 break;
2025                         case View.List:
2026                                 Scroll (h_scroll, -Items [0].Bounds.Width * lines);
2027                                 break;
2028                         }
2029                 }
2030
2031                 private void ListView_SizeChanged (object sender, EventArgs e)
2032                 {
2033                         CalculateListView (alignment);
2034                 }
2035
2036                 private void SetFocusedItem (ListViewItem item)
2037                 {
2038                         if (focused_item != null)
2039                                 focused_item.Focused = false;
2040
2041                         if (item != null)
2042                                 item.Focused = true;
2043
2044                         focused_item = item;
2045                 }
2046
2047                 private void HorizontalScroller (object sender, EventArgs e)
2048                 {
2049                         item_control.EndEdit (item_control.edit_item);
2050
2051                         // Avoid unnecessary flickering, when button is
2052                         // kept pressed at the end
2053                         if (h_marker != h_scroll.Value) {
2054
2055                                 int pixels =  h_marker - h_scroll.Value;
2056
2057                                 h_marker = h_scroll.Value;
2058                                 if (header_control.Visible)
2059                                         XplatUI.ScrollWindow (header_control.Handle, pixels, 0, false);
2060
2061                                 XplatUI.ScrollWindow (item_control.Handle, pixels, 0, false);
2062                         }
2063                 }
2064
2065                 private void VerticalScroller (object sender, EventArgs e)
2066                 {
2067                         item_control.EndEdit (item_control.edit_item);
2068
2069                         // Avoid unnecessary flickering, when button is
2070                         // kept pressed at the end
2071                         if (v_marker != v_scroll.Value) {
2072                                 int pixels =  v_marker - v_scroll.Value;
2073                                 Rectangle area = item_control.ClientRectangle;
2074                                 v_marker = v_scroll.Value;
2075                                 XplatUI.ScrollWindow (item_control.Handle, area, 0, pixels, false);
2076                         }
2077                 }
2078                 #endregion      // Internal Methods Properties
2079
2080                 #region Protected Methods
2081                 protected override void CreateHandle ()
2082                 {
2083                         base.CreateHandle ();
2084                         for (int i = 0; i < SelectedItems.Count; i++)
2085                                 OnSelectedIndexChanged (EventArgs.Empty);
2086                 }
2087
2088                 protected override void Dispose (bool disposing)
2089                 {
2090                         if (disposing) {
2091                                 h_scroll.Dispose ();
2092                                 v_scroll.Dispose ();
2093
2094                                 large_image_list = null;
2095                                 small_image_list = null;
2096                                 state_image_list = null;
2097                         }
2098
2099                         base.Dispose (disposing);
2100                 }
2101
2102                 protected override bool IsInputKey (Keys keyData)
2103                 {
2104                         switch (keyData) {
2105                         case Keys.Up:
2106                         case Keys.Down:
2107                         case Keys.PageUp:
2108                         case Keys.PageDown:
2109                         case Keys.Right:
2110                         case Keys.Left:
2111                         case Keys.End:
2112                         case Keys.Home:
2113                                 return true;
2114
2115                         default:
2116                                 break;
2117                         }
2118
2119                         return base.IsInputKey (keyData);
2120                 }
2121
2122                 protected virtual void OnAfterLabelEdit (LabelEditEventArgs e)
2123                 {
2124                         LabelEditEventHandler eh = (LabelEditEventHandler)(Events [AfterLabelEditEvent]);
2125                         if (eh != null)
2126                                 eh (this, e);
2127                 }
2128
2129                 protected virtual void OnBeforeLabelEdit (LabelEditEventArgs e)
2130                 {
2131                         LabelEditEventHandler eh = (LabelEditEventHandler)(Events [BeforeLabelEditEvent]);
2132                         if (eh != null)
2133                                 eh (this, e);
2134                 }
2135
2136                 protected virtual void OnColumnClick (ColumnClickEventArgs e)
2137                 {
2138                         ColumnClickEventHandler eh = (ColumnClickEventHandler)(Events [ColumnClickEvent]);
2139                         if (eh != null)
2140                                 eh (this, e);
2141                 }
2142
2143                 protected override void OnEnabledChanged (EventArgs e)
2144                 {
2145                         base.OnEnabledChanged (e);
2146                 }
2147
2148                 protected override void OnFontChanged (EventArgs e)
2149                 {
2150                         base.OnFontChanged (e);
2151                         Redraw (true);
2152                 }
2153
2154                 protected override void OnHandleCreated (EventArgs e)
2155                 {
2156                         base.OnHandleCreated (e);
2157                         Sort ();
2158                 }
2159
2160                 protected override void OnHandleDestroyed (EventArgs e)
2161                 {
2162                         base.OnHandleDestroyed (e);
2163                 }
2164
2165                 protected virtual void OnItemActivate (EventArgs e)
2166                 {
2167                         EventHandler eh = (EventHandler)(Events [ItemActivateEvent]);
2168                         if (eh != null)
2169                                 eh (this, e);
2170                 }
2171
2172                 protected virtual void OnItemCheck (ItemCheckEventArgs ice)
2173                 {
2174                         EventHandler eh = (EventHandler)(Events [ItemCheckEvent]);
2175                         if (eh != null)
2176                                 eh (this, ice);
2177                 }
2178
2179                 protected virtual void OnItemDrag (ItemDragEventArgs e)
2180                 {
2181                         EventHandler eh = (EventHandler)(Events [ItemDragEvent]);
2182                         if (eh != null)
2183                                 eh (this, e);
2184                 }
2185
2186                 protected virtual void OnSelectedIndexChanged (EventArgs e)
2187                 {
2188                         EventHandler eh = (EventHandler)(Events [SelectedIndexChangedEvent]);
2189                         if (eh != null)
2190                                 eh (this, e);
2191                 }
2192
2193                 protected override void OnSystemColorsChanged (EventArgs e)
2194                 {
2195                         base.OnSystemColorsChanged (e);
2196                 }
2197
2198                 protected void RealizeProperties ()
2199                 {
2200                         // FIXME: TODO
2201                 }
2202
2203                 protected void UpdateExtendedStyles ()
2204                 {
2205                         // FIXME: TODO
2206                 }
2207
2208                 protected override void WndProc (ref Message m)
2209                 {
2210                         base.WndProc (ref m);
2211                 }
2212                 #endregion // Protected Methods
2213
2214                 #region Public Instance Methods
2215                 public void ArrangeIcons ()
2216                 {
2217                         ArrangeIcons (this.alignment);
2218                 }
2219
2220                 public void ArrangeIcons (ListViewAlignment alignment)
2221                 {
2222                         // Icons are arranged only if view is set to LargeIcon or SmallIcon
2223                         if (view == View.LargeIcon || view == View.SmallIcon) {
2224                                 this.CalculateListView (alignment);
2225                                 // we have done the calculations already
2226                                 this.Redraw (false);
2227                         }
2228                 }
2229
2230                 public void BeginUpdate ()
2231                 {
2232                         // flag to avoid painting
2233                         updating = true;
2234                 }
2235
2236                 public void Clear ()
2237                 {
2238                         columns.Clear ();
2239                         items.Clear (); // Redraw (true) called here
2240                 }
2241
2242                 public void EndUpdate ()
2243                 {
2244                         // flag to avoid painting
2245                         updating = false;
2246
2247                         // probably, now we need a redraw with recalculations
2248                         this.Redraw (true);
2249                 }
2250
2251                 public void EnsureVisible (int index)
2252                 {
2253                         if (index < 0 || index >= items.Count || scrollable == false)
2254                                 return;
2255
2256                         Rectangle view_rect = item_control.ClientRectangle;
2257                         Rectangle bounds = items [index].Bounds;
2258
2259                         if (view_rect.Contains (bounds))
2260                                 return;
2261
2262                         if (bounds.Left < 0)
2263                                 h_scroll.Value += bounds.Left;
2264                         else if (bounds.Right > view_rect.Right)
2265                                 h_scroll.Value += (bounds.Right - view_rect.Right);
2266
2267                         if (bounds.Top < 0)
2268                                 v_scroll.Value += bounds.Top;
2269                         else if (bounds.Bottom > view_rect.Bottom)
2270                                 v_scroll.Value += (bounds.Bottom - view_rect.Bottom);
2271                 }
2272
2273                 public ListViewItem GetItemAt (int x, int y)
2274                 {
2275                         foreach (ListViewItem item in items) {
2276                                 if (item.Bounds.Contains (x, y))
2277                                         return item;
2278                         }
2279                         return null;
2280                 }
2281
2282                 public Rectangle GetItemRect (int index)
2283                 {
2284                         return GetItemRect (index, ItemBoundsPortion.Entire);
2285                 }
2286
2287                 public Rectangle GetItemRect (int index, ItemBoundsPortion portion)
2288                 {
2289                         if (index < 0 || index >= items.Count)
2290                                 throw new IndexOutOfRangeException ("index");
2291
2292                         return items [index].GetBounds (portion);
2293                 }
2294
2295                 public void Sort ()
2296                 {
2297                         Sort (true);
2298                 }
2299
2300                 // we need this overload to reuse the logic for sorting, while allowing
2301                 // redrawing to be done by caller or have it done by this method when
2302                 // sorting is really performed
2303                 //
2304                 // ListViewItemCollection's Add and AddRange methods call this overload
2305                 // with redraw set to false, as they take care of redrawing themselves
2306                 // (they even want to redraw the listview if no sort is performed, as
2307                 // an item was added), while ListView.Sort () only wants to redraw if
2308                 // sorting was actually performed
2309                 private void Sort (bool redraw)
2310                 {
2311                         if (!IsHandleCreated || item_sorter == null) {
2312                                 return;
2313                         }
2314
2315                         items.Sort (item_sorter);
2316                         if (redraw)
2317                                 this.Redraw (true);
2318                 }
2319
2320                 public override string ToString ()
2321                 {
2322                         int count = this.Items.Count;
2323
2324                         if (count == 0)
2325                                 return string.Format ("System.Windows.Forms.ListView, Items.Count: 0");
2326                         else
2327                                 return string.Format ("System.Windows.Forms.ListView, Items.Count: {0}, Items[0]: {1}", count, this.Items [0].ToString ());
2328                 }
2329                 #endregion      // Public Instance Methods
2330
2331
2332                 #region Subclasses
2333
2334                 class HeaderControl : Control {
2335
2336                         ListView owner;
2337                         bool column_resize_active = false;
2338                         ColumnHeader resize_column;
2339                         ColumnHeader clicked_column;
2340                         ColumnHeader drag_column;
2341                         int drag_x;
2342                         int drag_to_index = -1;
2343
2344                         public HeaderControl (ListView owner)
2345                         {
2346                                 this.owner = owner;
2347                                 MouseDown += new MouseEventHandler (HeaderMouseDown);
2348                                 MouseMove += new MouseEventHandler (HeaderMouseMove);
2349                                 MouseUp += new MouseEventHandler (HeaderMouseUp);
2350                         }
2351
2352                         private ColumnHeader ColumnAtX (int x)
2353                         {
2354                                 Point pt = new Point (x, 0);
2355                                 ColumnHeader result = null;
2356                                 foreach (ColumnHeader col in owner.Columns) {
2357                                         if (col.Rect.Contains (pt)) {
2358                                                 result = col;
2359                                                 break;
2360                                         }
2361                                 }
2362                                 return result;
2363                         }
2364
2365                         private int GetReorderedIndex (ColumnHeader col)
2366                         {
2367                                 if (owner.reordered_column_indices == null)
2368                                         return col.Index;
2369                                 else
2370                                         for (int i = 0; i < owner.Columns.Count; i++)
2371                                                 if (owner.reordered_column_indices [i] == col.Index)
2372                                                         return i;
2373                                 throw new Exception ("Column index missing from reordered array");
2374                         }
2375
2376                         private void HeaderMouseDown (object sender, MouseEventArgs me)
2377                         {
2378                                 if (resize_column != null) {
2379                                         column_resize_active = true;
2380                                         Capture = true;
2381                                         return;
2382                                 }
2383
2384                                 clicked_column = ColumnAtX (me.X + owner.h_marker);
2385
2386                                 if (clicked_column != null) {
2387                                         Capture = true;
2388                                         if (owner.AllowColumnReorder) {
2389                                                 drag_x = me.X;
2390                                                 drag_column = (ColumnHeader) (clicked_column as ICloneable).Clone ();
2391                                                 drag_column.Rect = clicked_column.Rect;
2392                                                 drag_to_index = GetReorderedIndex (clicked_column);
2393                                         }
2394                                         clicked_column.Pressed = true;
2395                                         Rectangle bounds = clicked_column.Rect;
2396                                         bounds.X -= owner.h_marker;
2397                                         Invalidate (bounds);
2398                                         return;
2399                                 }
2400                         }
2401
2402                         void StopResize ()
2403                         {
2404                                 column_resize_active = false;
2405                                 resize_column = null;
2406                                 Capture = false;
2407                                 Cursor = Cursors.Default;
2408                         }
2409
2410                         private void HeaderMouseMove (object sender, MouseEventArgs me)
2411                         {
2412                                 Point pt = new Point (me.X + owner.h_marker, me.Y);
2413
2414                                 if (column_resize_active)  {
2415                                         int width = pt.X - resize_column.X;
2416                                         if (width < 0)
2417                                                 width = 0;
2418
2419                                         if (!owner.CanProceedWithResize (resize_column, width)){
2420                                                 StopResize ();
2421                                                 return;
2422                                         }
2423                                         resize_column.Width = width;
2424                                         return;
2425                                 }
2426
2427                                 resize_column = null;
2428
2429                                 if (clicked_column != null) {
2430                                         if (owner.AllowColumnReorder) {
2431                                                 Rectangle r;
2432
2433                                                 r = drag_column.Rect;
2434                                                 r.X = clicked_column.Rect.X + me.X - drag_x;
2435                                                 drag_column.Rect = r;
2436
2437                                                 int x = me.X + owner.h_marker;
2438                                                 ColumnHeader over = ColumnAtX (x);
2439                                                 if (over == null)
2440                                                         drag_to_index = owner.Columns.Count;
2441                                                 else if (x < over.X + over.Width / 2)
2442                                                         drag_to_index = GetReorderedIndex (over);
2443                                                 else
2444                                                         drag_to_index = GetReorderedIndex (over) + 1;
2445                                                 Invalidate ();
2446                                         } else {
2447                                                 ColumnHeader over = ColumnAtX (me.X + owner.h_marker);
2448                                                 bool pressed = clicked_column.Pressed;
2449                                                 clicked_column.Pressed = over == clicked_column;
2450                                                 if (clicked_column.Pressed ^ pressed) {
2451                                                         Rectangle bounds = clicked_column.Rect;
2452                                                         bounds.X -= owner.h_marker;
2453                                                         Invalidate (bounds);
2454                                                 }
2455                                         }
2456                                         return;
2457                                 }
2458
2459                                 for (int i = 0; i < owner.Columns.Count; i++) {
2460                                         Rectangle zone = owner.Columns [i].Rect;
2461                                         zone.X = zone.Right - 5;
2462                                         zone.Width = 10;
2463                                         if (zone.Contains (pt)) {
2464                                                 if (i < owner.Columns.Count - 1 && owner.Columns [i + 1].Width == 0)
2465                                                         i++;
2466                                                 resize_column = owner.Columns [i];
2467                                                 break;
2468                                         }
2469                                 }
2470
2471                                 if (resize_column == null)
2472                                         Cursor = Cursors.Default;
2473                                 else
2474                                         Cursor = Cursors.VSplit;
2475                         }
2476
2477                         void HeaderMouseUp (object sender, MouseEventArgs me)
2478                         {
2479                                 Capture = false;
2480
2481                                 if (column_resize_active) {
2482                                         int column_idx = resize_column.Index;
2483                                         StopResize ();
2484                                         owner.RaiseColumnWidthChanged (column_idx);
2485                                         return;
2486                                 }
2487
2488                                 if (clicked_column != null && clicked_column.Pressed) {
2489                                         clicked_column.Pressed = false;
2490                                         Rectangle bounds = clicked_column.Rect;
2491                                         bounds.X -= owner.h_marker;
2492                                         Invalidate (bounds);
2493                                         owner.OnColumnClick (new ColumnClickEventArgs (clicked_column.Index));
2494                                 }
2495
2496                                 if (drag_column != null && owner.AllowColumnReorder) {
2497                                         drag_column = null;
2498                                         if (drag_to_index > GetReorderedIndex (clicked_column))
2499                                                 drag_to_index--;
2500                                         if (owner.GetReorderedColumn (drag_to_index) != clicked_column)
2501                                                 owner.ReorderColumn (clicked_column, drag_to_index);
2502                                         drag_to_index = -1;
2503                                         Invalidate ();
2504                                 }
2505
2506                                 clicked_column = null;
2507                         }
2508
2509                         internal override void OnPaintInternal (PaintEventArgs pe)
2510                         {
2511                                 if (owner.updating)
2512                                         return;
2513
2514                                 Theme theme = ThemeEngine.Current;
2515                                 theme.DrawListViewHeader (pe.Graphics, pe.ClipRectangle, this.owner);
2516
2517                                 if (drag_column == null)
2518                                         return;
2519
2520                                 int target_x;
2521                                 if (drag_to_index == owner.Columns.Count)
2522                                         target_x = owner.GetReorderedColumn (drag_to_index - 1).Rect.Right - owner.h_marker;
2523                                 else
2524                                         target_x = owner.GetReorderedColumn (drag_to_index).Rect.X - owner.h_marker;
2525                                 theme.DrawListViewHeaderDragDetails (pe.Graphics, owner, drag_column, target_x);
2526                         }
2527
2528                         protected override void WndProc (ref Message m)
2529                         {
2530                                 switch ((Msg)m.Msg) {
2531                                 case Msg.WM_SETFOCUS:
2532                                         owner.Focus ();
2533                                         break;
2534                                 default:
2535                                         base.WndProc (ref m);
2536                                         break;
2537                                 }
2538                         }
2539                 }
2540
2541                 private class ItemComparer : IComparer {
2542                         readonly SortOrder sort_order;
2543
2544                         public ItemComparer (SortOrder sortOrder)
2545                         {
2546                                 sort_order = sortOrder;
2547                         }
2548
2549                         public int Compare (object x, object y)
2550                         {
2551                                 ListViewItem item_x = x as ListViewItem;
2552                                 ListViewItem item_y = y as ListViewItem;
2553                                 if (sort_order == SortOrder.Ascending)
2554                                         return String.Compare (item_x.Text, item_y.Text);
2555                                 else
2556                                         return String.Compare (item_y.Text, item_x.Text);
2557                         }
2558                 }
2559
2560                 public class CheckedIndexCollection : IList, ICollection, IEnumerable
2561                 {
2562                         private readonly ListView owner;
2563
2564                         #region Public Constructor
2565                         public CheckedIndexCollection (ListView owner)
2566                         {
2567                                 this.owner = owner;
2568                         }
2569                         #endregion      // Public Constructor
2570
2571                         #region Public Properties
2572                         [Browsable (false)]
2573                         public int Count {
2574                                 get { return owner.CheckedItems.Count; }
2575                         }
2576
2577                         public bool IsReadOnly {
2578                                 get { return true; }
2579                         }
2580
2581                         public int this [int index] {
2582                                 get {
2583                                         int [] indices = GetIndices ();
2584                                         if (index < 0 || index >= indices.Length)
2585                                                 throw new ArgumentOutOfRangeException ("index");
2586                                         return indices [index];
2587                                 }
2588                         }
2589
2590                         bool ICollection.IsSynchronized {
2591                                 get { return false; }
2592                         }
2593
2594                         object ICollection.SyncRoot {
2595                                 get { return this; }
2596                         }
2597
2598                         bool IList.IsFixedSize {
2599                                 get { return true; }
2600                         }
2601
2602                         object IList.this [int index] {
2603                                 get { return this [index]; }
2604                                 set { throw new NotSupportedException ("SetItem operation is not supported."); }
2605                         }
2606                         #endregion      // Public Properties
2607
2608                         #region Public Methods
2609                         public bool Contains (int checkedIndex)
2610                         {
2611                                 int [] indices = GetIndices ();
2612                                 for (int i = 0; i < indices.Length; i++) {
2613                                         if (indices [i] == checkedIndex)
2614                                                 return true;
2615                                 }
2616                                 return false;
2617                         }
2618
2619                         public IEnumerator GetEnumerator ()
2620                         {
2621                                 int [] indices = GetIndices ();
2622                                 return indices.GetEnumerator ();
2623                         }
2624
2625                         void ICollection.CopyTo (Array dest, int index)
2626                         {
2627                                 int [] indices = GetIndices ();
2628                                 Array.Copy (indices, 0, dest, index, indices.Length);
2629                         }
2630
2631                         int IList.Add (object value)
2632                         {
2633                                 throw new NotSupportedException ("Add operation is not supported.");
2634                         }
2635
2636                         void IList.Clear ()
2637                         {
2638                                 throw new NotSupportedException ("Clear operation is not supported.");
2639                         }
2640
2641                         bool IList.Contains (object checkedIndex)
2642                         {
2643                                 if (!(checkedIndex is int))
2644                                         return false;
2645                                 return Contains ((int) checkedIndex);
2646                         }
2647
2648                         int IList.IndexOf (object checkedIndex)
2649                         {
2650                                 if (!(checkedIndex is int))
2651                                         return -1;
2652                                 return IndexOf ((int) checkedIndex);
2653                         }
2654
2655                         void IList.Insert (int index, object value)
2656                         {
2657                                 throw new NotSupportedException ("Insert operation is not supported.");
2658                         }
2659
2660                         void IList.Remove (object value)
2661                         {
2662                                 throw new NotSupportedException ("Remove operation is not supported.");
2663                         }
2664
2665                         void IList.RemoveAt (int index)
2666                         {
2667                                 throw new NotSupportedException ("RemoveAt operation is not supported.");
2668                         }
2669
2670                         public int IndexOf (int checkedIndex)
2671                         {
2672                                 int [] indices = GetIndices ();
2673                                 for (int i = 0; i < indices.Length; i++) {
2674                                         if (indices [i] == checkedIndex)
2675                                                 return i;
2676                                 }
2677                                 return -1;
2678                         }
2679                         #endregion      // Public Methods
2680
2681                         private int [] GetIndices ()
2682                         {
2683                                 ArrayList checked_items = owner.CheckedItems.List;
2684                                 int [] indices = new int [checked_items.Count];
2685                                 for (int i = 0; i < checked_items.Count; i++) {
2686                                         ListViewItem item = (ListViewItem) checked_items [i];
2687                                         indices [i] = item.Index;
2688                                 }
2689                                 return indices;
2690                         }
2691                 }       // CheckedIndexCollection
2692
2693                 public class CheckedListViewItemCollection : IList, ICollection, IEnumerable
2694                 {
2695                         private readonly ListView owner;
2696                         private ArrayList list;
2697
2698                         #region Public Constructor
2699                         public CheckedListViewItemCollection (ListView owner)
2700                         {
2701                                 this.owner = owner;
2702                                 this.owner.Items.Changed += new CollectionChangedHandler (
2703                                         ItemsCollection_Changed);
2704                         }
2705                         #endregion      // Public Constructor
2706
2707                         #region Public Properties
2708                         [Browsable (false)]
2709                         public int Count {
2710                                 get {
2711                                         if (!owner.CheckBoxes)
2712                                                 return 0;
2713                                         return List.Count;
2714                                 }
2715                         }
2716
2717                         public bool IsReadOnly {
2718                                 get { return true; }
2719                         }
2720
2721                         public ListViewItem this [int index] {
2722                                 get {
2723                                         ArrayList checked_items = List;
2724                                         if (index < 0 || index >= checked_items.Count)
2725                                                 throw new ArgumentOutOfRangeException ("index");
2726                                         return (ListViewItem) checked_items [index];
2727                                 }
2728                         }
2729
2730 #if NET_2_0
2731                         public virtual ListViewItem this [string key] {
2732                                 get {
2733                                         int idx = IndexOfKey (key);
2734                                         return idx == -1 ? null : (ListViewItem) List [idx];
2735                                 }
2736                         }
2737 #endif
2738
2739                         bool ICollection.IsSynchronized {
2740                                 get { return false; }
2741                         }
2742
2743                         object ICollection.SyncRoot {
2744                                 get { return this; }
2745                         }
2746
2747                         bool IList.IsFixedSize {
2748                                 get { return true; }
2749                         }
2750
2751                         object IList.this [int index] {
2752                                 get { return this [index]; }
2753                                 set { throw new NotSupportedException ("SetItem operation is not supported."); }
2754                         }
2755                         #endregion      // Public Properties
2756
2757                         #region Public Methods
2758                         public bool Contains (ListViewItem item)
2759                         {
2760                                 if (!owner.CheckBoxes)
2761                                         return false;
2762                                 return List.Contains (item);
2763                         }
2764
2765 #if NET_2_0
2766                         public virtual bool ContainsKey (string key)
2767                         {
2768                                 return IndexOfKey (key) != -1;
2769                         }
2770 #endif
2771
2772                         public void CopyTo (Array dest, int index)
2773                         {
2774                                 if (!owner.CheckBoxes)
2775                                         return;
2776                                 List.CopyTo (dest, index);
2777                         }
2778
2779                         public IEnumerator GetEnumerator ()
2780                         {
2781                                 if (!owner.CheckBoxes)
2782                                         return (new ListViewItem [0]).GetEnumerator ();
2783                                 return List.GetEnumerator ();
2784                         }
2785
2786                         int IList.Add (object value)
2787                         {
2788                                 throw new NotSupportedException ("Add operation is not supported.");
2789                         }
2790
2791                         void IList.Clear ()
2792                         {
2793                                 throw new NotSupportedException ("Clear operation is not supported.");
2794                         }
2795
2796                         bool IList.Contains (object item)
2797                         {
2798                                 if (!(item is ListViewItem))
2799                                         return false;
2800                                 return Contains ((ListViewItem) item);
2801                         }
2802
2803                         int IList.IndexOf (object item)
2804                         {
2805                                 if (!(item is ListViewItem))
2806                                         return -1;
2807                                 return IndexOf ((ListViewItem) item);
2808                         }
2809
2810                         void IList.Insert (int index, object value)
2811                         {
2812                                 throw new NotSupportedException ("Insert operation is not supported.");
2813                         }
2814
2815                         void IList.Remove (object value)
2816                         {
2817                                 throw new NotSupportedException ("Remove operation is not supported.");
2818                         }
2819
2820                         void IList.RemoveAt (int index)
2821                         {
2822                                 throw new NotSupportedException ("RemoveAt operation is not supported.");
2823                         }
2824
2825                         public int IndexOf (ListViewItem item)
2826                         {
2827                                 if (!owner.CheckBoxes)
2828                                         return -1;
2829                                 return List.IndexOf (item);
2830                         }
2831
2832 #if NET_2_0
2833                         public virtual int IndexOfKey (string key)
2834                         {
2835                                 if (key == null || key.Length == 0)
2836                                         return -1;
2837
2838                                 ArrayList checked_items = List;
2839                                 for (int i = 0; i < checked_items.Count; i++) {
2840                                         ListViewItem item = (ListViewItem) checked_items [i];
2841                                         if (String.Compare (key, item.Name, true) == 0)
2842                                                 return i;
2843                                 }
2844
2845                                 return -1;
2846                         }
2847 #endif
2848                         #endregion      // Public Methods
2849
2850                         internal ArrayList List {
2851                                 get {
2852                                         if (list == null) {
2853                                                 list = new ArrayList ();
2854                                                 foreach (ListViewItem item in owner.Items) {
2855                                                         if (item.Checked)
2856                                                                 list.Add (item);
2857                                                 }
2858                                         }
2859                                         return list;
2860                                 }
2861                         }
2862
2863                         internal void Reset ()
2864                         {
2865                                 // force re-population of list
2866                                 list = null;
2867                         }
2868
2869                         private void ItemsCollection_Changed ()
2870                         {
2871                                 Reset ();
2872                         }
2873                 }       // CheckedListViewItemCollection
2874
2875                 public class ColumnHeaderCollection : IList, ICollection, IEnumerable
2876                 {
2877                         internal ArrayList list;
2878                         private ListView owner;
2879
2880                         #region Public Constructor
2881                         public ColumnHeaderCollection (ListView owner)
2882                         {
2883                                 list = new ArrayList ();
2884                                 this.owner = owner;
2885                         }
2886                         #endregion      // Public Constructor
2887
2888                         #region Public Properties
2889                         [Browsable (false)]
2890                         public int Count {
2891                                 get { return list.Count; }
2892                         }
2893
2894                         public bool IsReadOnly {
2895                                 get { return false; }
2896                         }
2897
2898                         public virtual ColumnHeader this [int index] {
2899                                 get {
2900                                         if (index < 0 || index >= list.Count)
2901                                                 throw new ArgumentOutOfRangeException ("index");
2902                                         return (ColumnHeader) list [index];
2903                                 }
2904                         }
2905
2906 #if NET_2_0
2907                         public virtual ColumnHeader this [string key] {
2908                                 get {
2909                                         int idx = IndexOfKey (key);
2910                                         if (idx == -1)
2911                                                 return null;
2912
2913                                         return (ColumnHeader) list [idx];
2914                                 }
2915                         }
2916 #endif
2917
2918                         bool ICollection.IsSynchronized {
2919                                 get { return true; }
2920                         }
2921
2922                         object ICollection.SyncRoot {
2923                                 get { return this; }
2924                         }
2925
2926                         bool IList.IsFixedSize {
2927                                 get { return list.IsFixedSize; }
2928                         }
2929
2930                         object IList.this [int index] {
2931                                 get { return this [index]; }
2932                                 set { throw new NotSupportedException ("SetItem operation is not supported."); }
2933                         }
2934                         #endregion      // Public Properties
2935
2936                         #region Public Methods
2937                         public virtual int Add (ColumnHeader value)
2938                         {
2939                                 int idx;
2940                                 value.SetListView (this.owner);
2941                                 idx = list.Add (value);
2942                                 if (owner.IsHandleCreated) {
2943                                         owner.Redraw (true);
2944                                 }
2945                                 return idx;
2946                         }
2947
2948                         public virtual ColumnHeader Add (string str, int width, HorizontalAlignment textAlign)
2949                         {
2950                                 ColumnHeader colHeader = new ColumnHeader (this.owner, str, textAlign, width);
2951                                 this.Add (colHeader);
2952                                 return colHeader;
2953                         }
2954
2955 #if NET_2_0
2956                         public virtual ColumnHeader Add (string text)
2957                         {
2958                                 return Add (String.Empty, text);
2959                         }
2960
2961                         public virtual ColumnHeader Add (string text, int iwidth)
2962                         {
2963                                 return Add (String.Empty, text, iwidth);
2964                         }
2965
2966                         public virtual ColumnHeader Add (string key, string text)
2967                         {
2968                                 ColumnHeader colHeader = new ColumnHeader ();
2969                                 colHeader.Name = key;
2970                                 colHeader.Text = text;
2971                                 Add (colHeader);
2972                                 return colHeader;
2973                         }
2974
2975                         public virtual ColumnHeader Add (string key, string text, int iwidth)
2976                         {
2977                                 return Add (key, text, iwidth, HorizontalAlignment.Left, -1);
2978                         }
2979
2980                         public virtual ColumnHeader Add (string key, string text, int iwidth, HorizontalAlignment textAlign, int imageIndex)
2981                         {
2982                                 ColumnHeader colHeader = new ColumnHeader (key, text, iwidth, textAlign);
2983                                 colHeader.ImageIndex = imageIndex;
2984                                 Add (colHeader);
2985                                 return colHeader;
2986                         }
2987
2988                         public virtual ColumnHeader Add (string key, string text, int iwidth, HorizontalAlignment textAlign, string imageKey)
2989                         {
2990                                 ColumnHeader colHeader = new ColumnHeader (key, text, iwidth, textAlign);
2991                                 colHeader.ImageKey = imageKey;
2992                                 Add (colHeader);
2993                                 return colHeader;
2994                         }
2995 #endif
2996
2997                         public virtual void AddRange (ColumnHeader [] values)
2998                         {
2999                                 foreach (ColumnHeader colHeader in values) {
3000                                         colHeader.SetListView (this.owner);
3001                                         Add (colHeader);
3002                                 }
3003
3004                                 owner.Redraw (true);
3005                         }
3006
3007                         public virtual void Clear ()
3008                         {
3009                                 list.Clear ();
3010                                 owner.Redraw (true);
3011                         }
3012
3013                         public bool Contains (ColumnHeader value)
3014                         {
3015                                 return list.Contains (value);
3016                         }
3017
3018 #if NET_2_0
3019                         public virtual bool ContainsKey (string key)
3020                         {
3021                                 return IndexOfKey (key) != -1;
3022                         }
3023 #endif
3024
3025                         public IEnumerator GetEnumerator ()
3026                         {
3027                                 return list.GetEnumerator ();
3028                         }
3029
3030                         void ICollection.CopyTo (Array dest, int index)
3031                         {
3032                                 list.CopyTo (dest, index);
3033                         }
3034
3035                         int IList.Add (object value)
3036                         {
3037                                 if (! (value is ColumnHeader)) {
3038                                         throw new ArgumentException ("Not of type ColumnHeader", "value");
3039                                 }
3040
3041                                 return this.Add ((ColumnHeader) value);
3042                         }
3043
3044                         bool IList.Contains (object value)
3045                         {
3046                                 if (! (value is ColumnHeader)) {
3047                                         throw new ArgumentException ("Not of type ColumnHeader", "value");
3048                                 }
3049
3050                                 return this.Contains ((ColumnHeader) value);
3051                         }
3052
3053                         int IList.IndexOf (object value)
3054                         {
3055                                 if (! (value is ColumnHeader)) {
3056                                         throw new ArgumentException ("Not of type ColumnHeader", "value");
3057                                 }
3058
3059                                 return this.IndexOf ((ColumnHeader) value);
3060                         }
3061
3062                         void IList.Insert (int index, object value)
3063                         {
3064                                 if (! (value is ColumnHeader)) {
3065                                         throw new ArgumentException ("Not of type ColumnHeader", "value");
3066                                 }
3067
3068                                 this.Insert (index, (ColumnHeader) value);
3069                         }
3070
3071                         void IList.Remove (object value)
3072                         {
3073                                 if (! (value is ColumnHeader)) {
3074                                         throw new ArgumentException ("Not of type ColumnHeader", "value");
3075                                 }
3076
3077                                 this.Remove ((ColumnHeader) value);
3078                         }
3079
3080                         public int IndexOf (ColumnHeader value)
3081                         {
3082                                 return list.IndexOf (value);
3083                         }
3084
3085 #if NET_2_0
3086                         public virtual int IndexOfKey (string key)
3087                         {
3088                                 if (key == null || key.Length == 0)
3089                                         return -1;
3090
3091                                 for (int i = 0; i < list.Count; i++) {
3092                                         ColumnHeader col = (ColumnHeader) list [i];
3093                                         if (String.Compare (key, col.Name, true) == 0)
3094                                                 return i;
3095                                 }
3096
3097                                 return -1;
3098                         }
3099 #endif
3100
3101                         public void Insert (int index, ColumnHeader value)
3102                         {
3103                                 // LAMESPEC: MSDOCS say greater than or equal to the value of the Count property
3104                                 // but it's really only greater.
3105                                 if (index < 0 || index > list.Count)
3106                                         throw new ArgumentOutOfRangeException ("index");
3107
3108                                 value.SetListView (owner);
3109                                 list.Insert (index, value);
3110                                 owner.Redraw (true);
3111                         }
3112
3113 #if NET_2_0
3114                         public void Insert (int index, string text)
3115                         {
3116                                 Insert (index, String.Empty, text);
3117                         }
3118
3119                         public void Insert (int index, string text, int width)
3120                         {
3121                                 Insert (index, String.Empty, text, width);
3122                         }
3123
3124                         public void Insert (int index, string key, string text)
3125                         {
3126                                 ColumnHeader colHeader = new ColumnHeader ();
3127                                 colHeader.Name = key;
3128                                 colHeader.Text = text;
3129                                 Insert (index, colHeader);
3130                         }
3131
3132                         public void Insert (int index, string key, string text, int width)
3133                         {
3134                                 ColumnHeader colHeader = new ColumnHeader (key, text, width, HorizontalAlignment.Left);
3135                                 Insert (index, colHeader);
3136                         }
3137
3138                         public void Insert (int index, string key, string text, int width, HorizontalAlignment textAlign, int imageIndex)
3139                         {
3140                                 ColumnHeader colHeader = new ColumnHeader (key, text, width, textAlign);
3141                                 colHeader.ImageIndex = imageIndex;
3142                                 Insert (index, colHeader);
3143                         }
3144
3145                         public void Insert (int index, string key, string text, int width, HorizontalAlignment textAlign, string imageKey)
3146                         {
3147                                 ColumnHeader colHeader = new ColumnHeader (key, text, width, textAlign);
3148                                 colHeader.ImageKey = imageKey;
3149                                 Insert (index, colHeader);
3150                         }
3151 #endif
3152
3153                         public void Insert (int index, string str, int width, HorizontalAlignment textAlign)
3154                         {
3155                                 ColumnHeader colHeader = new ColumnHeader (this.owner, str, textAlign, width);
3156                                 this.Insert (index, colHeader);
3157                         }
3158
3159                         public virtual void Remove (ColumnHeader column)
3160                         {
3161                                 // TODO: Update Column internal index ?
3162                                 list.Remove (column);
3163                                 owner.Redraw (true);
3164                         }
3165
3166 #if NET_2_0
3167                         public virtual void RemoveByKey (string key)
3168                         {
3169                                 int idx = IndexOfKey (key);
3170                                 if (idx != -1)
3171                                         RemoveAt (idx);
3172                         }
3173 #endif
3174
3175                         public virtual void RemoveAt (int index)
3176                         {
3177                                 if (index < 0 || index >= list.Count)
3178                                         throw new ArgumentOutOfRangeException ("index");
3179
3180                                 // TODO: Update Column internal index ?
3181                                 list.RemoveAt (index);
3182                                 owner.Redraw (true);
3183                         }
3184                         #endregion      // Public Methods
3185
3186
3187                 }       // ColumnHeaderCollection
3188
3189                 public class ListViewItemCollection : IList, ICollection, IEnumerable
3190                 {
3191                         private readonly ArrayList list;
3192                         private readonly ListView owner;
3193
3194                         #region Public Constructor
3195                         public ListViewItemCollection (ListView owner)
3196                         {
3197                                 list = new ArrayList ();
3198                                 this.owner = owner;
3199                         }
3200                         #endregion      // Public Constructor
3201
3202                         #region Public Properties
3203                         [Browsable (false)]
3204                         public int Count {
3205                                 get { return list.Count; }
3206                         }
3207
3208                         public bool IsReadOnly {
3209                                 get { return false; }
3210                         }
3211
3212                         public virtual ListViewItem this [int displayIndex] {
3213                                 get {
3214                                         if (displayIndex < 0 || displayIndex >= list.Count)
3215                                                 throw new ArgumentOutOfRangeException ("displayIndex");
3216                                         return (ListViewItem) list [displayIndex];
3217                                 }
3218
3219                                 set {
3220                                         if (displayIndex < 0 || displayIndex >= list.Count)
3221                                                 throw new ArgumentOutOfRangeException ("displayIndex");
3222
3223                                         if (list.Contains (value))
3224                                                 throw new ArgumentException ("An item cannot be added more than once. To add an item again, you need to clone it.", "value");
3225
3226                                         if (value.ListView != null && value.ListView != owner)
3227                                                 throw new ArgumentException ("Cannot add or insert the item '" + value.Text + "' in more than one place. You must first remove it from its current location or clone it.", "value");
3228
3229                                         value.Owner = owner;
3230                                         list [displayIndex] = value;
3231                                         OnChange ();
3232
3233                                         owner.Redraw (true);
3234                                 }
3235                         }
3236
3237 #if NET_2_0
3238                         public virtual ListViewItem this [string key] {
3239                                 get {
3240                                         int idx = IndexOfKey (key);
3241                                         if (idx == -1)
3242                                                 return null;
3243
3244                                         return (ListViewItem) list [idx];
3245                                 }
3246                         }
3247 #endif
3248
3249                         bool ICollection.IsSynchronized {
3250                                 get { return true; }
3251                         }
3252
3253                         object ICollection.SyncRoot {
3254                                 get { return this; }
3255                         }
3256
3257                         bool IList.IsFixedSize {
3258                                 get { return list.IsFixedSize; }
3259                         }
3260
3261                         object IList.this [int index] {
3262                                 get { return this [index]; }
3263                                 set {
3264                                         if (value is ListViewItem)
3265                                                 this [index] = (ListViewItem) value;
3266                                         else
3267                                                 this [index] = new ListViewItem (value.ToString ());
3268                                         OnChange ();
3269                                 }
3270                         }
3271                         #endregion      // Public Properties
3272
3273                         #region Public Methods
3274                         public virtual ListViewItem Add (ListViewItem value)
3275                         {
3276                                 if (list.Contains (value))
3277                                         throw new ArgumentException ("An item cannot be added more than once. To add an item again, you need to clone it.", "value");
3278
3279                                 if (value.ListView != null && value.ListView != owner)
3280                                         throw new ArgumentException ("Cannot add or insert the item '" + value.Text + "' in more than one place. You must first remove it from its current location or clone it.", "value");
3281
3282                                 value.Owner = owner;
3283                                 list.Add (value);
3284
3285                                 if (this.owner != null)
3286                                 {
3287                                         owner.Sort (false);
3288                                         OnChange ();
3289                                         owner.Redraw (true);
3290                                 }
3291
3292                                 return value;
3293                         }
3294
3295                         public virtual ListViewItem Add (string text)
3296                         {
3297                                 ListViewItem item = new ListViewItem (text);
3298                                 return this.Add (item);
3299                         }
3300
3301                         public virtual ListViewItem Add (string text, int imageIndex)
3302                         {
3303                                 ListViewItem item = new ListViewItem (text, imageIndex);
3304                                 return this.Add (item);
3305                         }
3306
3307 #if NET_2_0
3308                         public virtual ListViewItem Add (string text, string imageKey)
3309                         {
3310                                 ListViewItem item = new ListViewItem (text, imageKey);
3311                                 return this.Add (item);
3312                         }
3313
3314                         public virtual ListViewItem Add (string key, string text, int imageIndex)
3315                         {
3316                                 ListViewItem item = new ListViewItem (text, imageIndex);
3317                                 item.Name = key;
3318                                 return this.Add (item);
3319                         }
3320
3321                         public virtual ListViewItem Add (string key, string text, string imageKey)
3322                         {
3323                                 ListViewItem item = new ListViewItem (text, imageKey);
3324                                 item.Name = key;
3325                                 return this.Add (item);
3326                         }
3327 #endif
3328
3329                         public void AddRange (ListViewItem [] values)
3330                         {
3331                                 if (values == null)
3332                                         throw new ArgumentNullException ("Argument cannot be null!", "values");
3333
3334                                 foreach (ListViewItem item in values) {
3335                                         this.Add (item);
3336                                 }
3337                         }
3338
3339 #if NET_2_0
3340                         public void AddRange (ListViewItemCollection items)
3341                         {
3342                                 if (items == null)
3343                                         throw new ArgumentNullException ("Argument cannot be null!", "items");
3344
3345                                 ListViewItem[] itemArray = new ListViewItem[items.Count];
3346                                 items.CopyTo (itemArray,0);
3347                                 this.AddRange (itemArray);
3348                         }
3349 #endif
3350
3351                         public virtual void Clear ()
3352                         {
3353                                 owner.SetFocusedItem (null);
3354                                 owner.h_scroll.Value = owner.v_scroll.Value = 0;
3355                                 list.Clear ();
3356                                 OnChange ();
3357                                 owner.Redraw (true);
3358                         }
3359
3360                         public bool Contains (ListViewItem item)
3361                         {
3362                                 return list.Contains (item);
3363                         }
3364
3365 #if NET_2_0
3366                         public virtual bool ContainsKey (string key)
3367                         {
3368                                 return IndexOfKey (key) != -1;
3369                         }
3370 #endif
3371
3372                         public void CopyTo (Array dest, int index)
3373                         {
3374                                 list.CopyTo (dest, index);
3375                         }
3376
3377 #if NET_2_0
3378                         public ListViewItem [] Find (string key, bool searchAllSubitems)
3379                         {
3380                                 if (key == null)
3381                                         return new ListViewItem [0];
3382
3383                                 List<ListViewItem> temp_list = new List<ListViewItem> ();
3384
3385                                 for (int i = 0; i < list.Count; i++) {
3386                                         ListViewItem lvi = (ListViewItem) list [i];
3387                                         if (String.Compare (key, lvi.Name, true) == 0)
3388                                                 temp_list.Add (lvi);
3389                                 }
3390
3391                                 ListViewItem [] retval = new ListViewItem [temp_list.Count];
3392                                 temp_list.CopyTo (retval);
3393
3394                                 return retval;
3395                         }
3396 #endif
3397
3398                         public IEnumerator GetEnumerator ()
3399                         {
3400                                 return list.GetEnumerator ();
3401                         }
3402
3403                         int IList.Add (object item)
3404                         {
3405                                 int result;
3406                                 ListViewItem li;
3407
3408                                 if (item is ListViewItem) {
3409                                         li = (ListViewItem) item;
3410                                         if (list.Contains (li))
3411                                                 throw new ArgumentException ("An item cannot be added more than once. To add an item again, you need to clone it.", "item");
3412
3413                                         if (li.ListView != null && li.ListView != owner)
3414                                                 throw new ArgumentException ("Cannot add or insert the item '" + li.Text + "' in more than one place. You must first remove it from its current location or clone it.", "item");
3415                                 }
3416                                 else
3417                                         li = new ListViewItem (item.ToString ());
3418
3419                                 li.Owner = owner;
3420                                 result = list.Add (li);
3421                                 OnChange ();
3422                                 owner.Redraw (true);
3423
3424                                 return result;
3425                         }
3426
3427                         bool IList.Contains (object item)
3428                         {
3429                                 return list.Contains (item);
3430                         }
3431
3432                         int IList.IndexOf (object item)
3433                         {
3434                                 return list.IndexOf (item);
3435                         }
3436
3437                         void IList.Insert (int index, object item)
3438                         {
3439                                 if (item is ListViewItem)
3440                                         this.Insert (index, (ListViewItem) item);
3441                                 else
3442                                         this.Insert (index, item.ToString ());
3443                         }
3444
3445                         void IList.Remove (object item)
3446                         {
3447                                 Remove ((ListViewItem) item);
3448                         }
3449
3450                         public int IndexOf (ListViewItem item)
3451                         {
3452                                 return list.IndexOf (item);
3453                         }
3454
3455 #if NET_2_0
3456                         public virtual int IndexOfKey (string key)
3457                         {
3458                                 if (key == null || key.Length == 0)
3459                                         return -1;
3460
3461                                 for (int i = 0; i < list.Count; i++) {
3462                                         ListViewItem lvi = (ListViewItem) list [i];
3463                                         if (String.Compare (key, lvi.Name, true) == 0)
3464                                                 return i;
3465                                 }
3466
3467                                 return -1;
3468                         }
3469 #endif
3470
3471                         public ListViewItem Insert (int index, ListViewItem item)
3472                         {
3473                                 if (index < 0 || index > list.Count)
3474                                         throw new ArgumentOutOfRangeException ("index");
3475
3476                                 if (list.Contains (item))
3477                                         throw new ArgumentException ("An item cannot be added more than once. To add an item again, you need to clone it.", "item");
3478
3479                                 if (item.ListView != null && item.ListView != owner)
3480                                         throw new ArgumentException ("Cannot add or insert the item '" + item.Text + "' in more than one place. You must first remove it from its current location or clone it.", "item");
3481
3482                                 item.Owner = owner;
3483                                 list.Insert (index, item);
3484                                 OnChange ();
3485                                 owner.Redraw (true);
3486                                 return item;
3487                         }
3488
3489                         public ListViewItem Insert (int index, string text)
3490                         {
3491                                 return this.Insert (index, new ListViewItem (text));
3492                         }
3493
3494                         public ListViewItem Insert (int index, string text, int imageIndex)
3495                         {
3496                                 return this.Insert (index, new ListViewItem (text, imageIndex));
3497                         }
3498
3499 #if NET_2_0
3500                         public ListViewItem Insert (int index, string key, string text, int imageIndex)
3501                         {
3502                                 ListViewItem lvi = new ListViewItem (text, imageIndex);
3503                                 lvi.Name = key;
3504                                 return Insert (index, lvi);
3505                         }
3506 #endif
3507
3508                         public virtual void Remove (ListViewItem item)
3509                         {
3510                                 if (!list.Contains (item))
3511                                         return;
3512
3513                                 bool selection_changed = owner.SelectedItems.Contains (item);
3514                                 list.Remove (item);
3515                                 OnChange ();
3516                                 owner.Redraw (true);
3517                                 if (selection_changed)
3518                                         owner.OnSelectedIndexChanged (EventArgs.Empty);
3519                         }
3520
3521                         public virtual void RemoveAt (int index)
3522                         {
3523                                 if (index < 0 || index >= Count)
3524                                         throw new ArgumentOutOfRangeException ("index");
3525                                 bool selection_changed = owner.SelectedIndices.Contains (index);
3526                                 list.RemoveAt (index);
3527                                 OnChange ();
3528                                 owner.Redraw (false);
3529                                 if (selection_changed)
3530                                         owner.OnSelectedIndexChanged (EventArgs.Empty);
3531                         }
3532
3533 #if NET_2_0
3534                         public virtual void RemoveByKey (string key)
3535                         {
3536                                 int idx = IndexOfKey (key);
3537                                 if (idx != -1)
3538                                         RemoveAt (idx);
3539                         }
3540 #endif
3541
3542                         #endregion      // Public Methods
3543
3544                         internal event CollectionChangedHandler Changed;
3545
3546                         internal void Sort (IComparer comparer)
3547                         {
3548                                 list.Sort (comparer);
3549                                 OnChange ();
3550                         }
3551
3552                         internal void OnChange ()
3553                         {
3554                                 if (Changed != null)
3555                                         Changed ();
3556                         }
3557                 }       // ListViewItemCollection
3558
3559                 public class SelectedIndexCollection : IList, ICollection, IEnumerable
3560                 {
3561                         private readonly ListView owner;
3562
3563                         #region Public Constructor
3564                         public SelectedIndexCollection (ListView owner)
3565                         {
3566                                 this.owner = owner;
3567                         }
3568                         #endregion      // Public Constructor
3569
3570                         #region Public Properties
3571                         [Browsable (false)]
3572                         public int Count {
3573                                 get {
3574                                         return owner.SelectedItems.Count;
3575                                 }
3576                         }
3577
3578                         public bool IsReadOnly {
3579                                 get {
3580 #if NET_2_0
3581                                         return false;
3582 #else
3583                                         return true;
3584 #endif
3585                                 }
3586                         }
3587
3588                         public int this [int index] {
3589                                 get {
3590                                         int [] indices = GetIndices ();
3591                                         if (index < 0 || index >= indices.Length)
3592                                                 throw new ArgumentOutOfRangeException ("index");
3593                                         return indices [index];
3594                                 }
3595                         }
3596
3597                         bool ICollection.IsSynchronized {
3598                                 get { return false; }
3599                         }
3600
3601                         object ICollection.SyncRoot {
3602                                 get { return this; }
3603                         }
3604
3605                         bool IList.IsFixedSize {
3606                                 get {
3607 #if NET_2_0
3608                                         return false;
3609 #else
3610                                         return true;
3611 #endif
3612                                 }
3613                         }
3614
3615                         object IList.this [int index] {
3616                                 get { return this [index]; }
3617                                 set { throw new NotSupportedException ("SetItem operation is not supported."); }
3618                         }
3619                         #endregion      // Public Properties
3620
3621                         #region Public Methods
3622 #if NET_2_0
3623                         public int Add (int itemIndex)
3624                         {
3625                                 if (itemIndex < 0 || itemIndex >= owner.Items.Count)
3626                                         throw new ArgumentOutOfRangeException ("index");
3627
3628                                 owner.Items [itemIndex].Selected = true;
3629                                 if (!owner.IsHandleCreated)
3630                                         return 0;
3631
3632                                 return owner.SelectedItems.Count;
3633                         }
3634
3635                         public void Clear ()
3636                         {
3637                                 owner.SelectedItems.Clear ();
3638                         }
3639 #endif
3640                         public bool Contains (int selectedIndex)
3641                         {
3642                                 int [] indices = GetIndices ();
3643                                 for (int i = 0; i < indices.Length; i++) {
3644                                         if (indices [i] == selectedIndex)
3645                                                 return true;
3646                                 }
3647                                 return false;
3648                         }
3649
3650                         public void CopyTo (Array dest, int index)
3651                         {
3652                                 int [] indices = GetIndices ();
3653                                 Array.Copy (indices, 0, dest, index, indices.Length);
3654                         }
3655
3656                         public IEnumerator GetEnumerator ()
3657                         {
3658                                 int [] indices = GetIndices ();
3659                                 return indices.GetEnumerator ();
3660                         }
3661
3662                         int IList.Add (object value)
3663                         {
3664                                 throw new NotSupportedException ("Add operation is not supported.");
3665                         }
3666
3667                         void IList.Clear ()
3668                         {
3669                                 throw new NotSupportedException ("Clear operation is not supported.");
3670                         }
3671
3672                         bool IList.Contains (object selectedIndex)
3673                         {
3674                                 if (!(selectedIndex is int))
3675                                         return false;
3676                                 return Contains ((int) selectedIndex);
3677                         }
3678
3679                         int IList.IndexOf (object selectedIndex)
3680                         {
3681                                 if (!(selectedIndex is int))
3682                                         return -1;
3683                                 return IndexOf ((int) selectedIndex);
3684                         }
3685
3686                         void IList.Insert (int index, object value)
3687                         {
3688                                 throw new NotSupportedException ("Insert operation is not supported.");
3689                         }
3690
3691                         void IList.Remove (object value)
3692                         {
3693                                 throw new NotSupportedException ("Remove operation is not supported.");
3694                         }
3695
3696                         void IList.RemoveAt (int index)
3697                         {
3698                                 throw new NotSupportedException ("RemoveAt operation is not supported.");
3699                         }
3700
3701                         public int IndexOf (int selectedIndex)
3702                         {
3703                                 int [] indices = GetIndices ();
3704                                 for (int i = 0; i < indices.Length; i++) {
3705                                         if (indices [i] == selectedIndex)
3706                                                 return i;
3707                                 }
3708                                 return -1;
3709                         }
3710
3711 #if NET_2_0
3712                         public void Remove (int itemIndex)
3713                         {
3714                                 if (itemIndex < 0 || itemIndex >= owner.Items.Count)
3715                                         throw new ArgumentOutOfRangeException ("itemIndex");
3716
3717                                 owner.Items [itemIndex].Selected = false;
3718                         }
3719 #endif
3720                         #endregion      // Public Methods
3721
3722                         private int [] GetIndices ()
3723                         {
3724                                 ArrayList selected_items = owner.SelectedItems.List;
3725                                 int [] indices = new int [selected_items.Count];
3726                                 for (int i = 0; i < selected_items.Count; i++) {
3727                                         ListViewItem item = (ListViewItem) selected_items [i];
3728                                         indices [i] = item.Index;
3729                                 }
3730                                 return indices;
3731                         }
3732                 }       // SelectedIndexCollection
3733
3734                 public class SelectedListViewItemCollection : IList, ICollection, IEnumerable
3735                 {
3736                         private readonly ListView owner;
3737                         private ArrayList list;
3738
3739                         #region Public Constructor
3740                         public SelectedListViewItemCollection (ListView owner)
3741                         {
3742                                 this.owner = owner;
3743                                 this.owner.Items.Changed += new CollectionChangedHandler (
3744                                         ItemsCollection_Changed);
3745                         }
3746                         #endregion      // Public Constructor
3747
3748                         #region Public Properties
3749                         [Browsable (false)]
3750                         public int Count {
3751                                 get {
3752                                         if (!owner.IsHandleCreated)
3753                                                 return 0;
3754                                         return List.Count;
3755                                 }
3756                         }
3757
3758                         public bool IsReadOnly {
3759                                 get { return true; }
3760                         }
3761
3762                         public ListViewItem this [int index] {
3763                                 get {
3764                                         ArrayList selected_items = List;
3765                                         if (!owner.IsHandleCreated || index < 0 || index >= selected_items.Count)
3766                                                 throw new ArgumentOutOfRangeException ("index");
3767                                         return (ListViewItem) selected_items [index];
3768                                 }
3769                         }
3770
3771 #if NET_2_0
3772                         public virtual ListViewItem this [string key] {
3773                                 get {
3774                                         int idx = IndexOfKey (key);
3775                                         if (idx == -1)
3776                                                 return null;
3777
3778                                         return (ListViewItem) List [idx];
3779                                 }
3780                         }
3781 #endif
3782
3783                         bool ICollection.IsSynchronized {
3784                                 get { return false; }
3785                         }
3786
3787                         object ICollection.SyncRoot {
3788                                 get { return this; }
3789                         }
3790
3791                         bool IList.IsFixedSize {
3792                                 get { return true; }
3793                         }
3794
3795                         object IList.this [int index] {
3796                                 get { return this [index]; }
3797                                 set { throw new NotSupportedException ("SetItem operation is not supported."); }
3798                         }
3799                         #endregion      // Public Properties
3800
3801                         #region Public Methods
3802                         public void Clear ()
3803                         {
3804                                 if (!owner.IsHandleCreated)
3805                                         return;
3806
3807                                 foreach (ListViewItem item in List)
3808                                         item.Selected = false;
3809                         }
3810
3811                         public bool Contains (ListViewItem item)
3812                         {
3813                                 if (!owner.IsHandleCreated)
3814                                         return false;
3815                                 return List.Contains (item);
3816                         }
3817
3818 #if NET_2_0
3819                         public virtual bool ContainsKey (string key)
3820                         {
3821                                 return IndexOfKey (key) != -1;
3822                         }
3823 #endif
3824
3825                         public void CopyTo (Array dest, int index)
3826                         {
3827                                 if (!owner.IsHandleCreated)
3828                                         return;
3829                                 List.CopyTo (dest, index);
3830                         }
3831
3832                         public IEnumerator GetEnumerator ()
3833                         {
3834                                 if (!owner.IsHandleCreated)
3835                                         return (new ListViewItem [0]).GetEnumerator ();
3836                                 return List.GetEnumerator ();
3837                         }
3838
3839                         int IList.Add (object value)
3840                         {
3841                                 throw new NotSupportedException ("Add operation is not supported.");
3842                         }
3843
3844                         bool IList.Contains (object item)
3845                         {
3846                                 if (!(item is ListViewItem))
3847                                         return false;
3848                                 return Contains ((ListViewItem) item);
3849                         }
3850
3851                         int IList.IndexOf (object item)
3852                         {
3853                                 if (!(item is ListViewItem))
3854                                         return -1;
3855                                 return IndexOf ((ListViewItem) item);
3856                         }
3857
3858                         void IList.Insert (int index, object value)
3859                         {
3860                                 throw new NotSupportedException ("Insert operation is not supported.");
3861                         }
3862
3863                         void IList.Remove (object value)
3864                         {
3865                                 throw new NotSupportedException ("Remove operation is not supported.");
3866                         }
3867
3868                         void IList.RemoveAt (int index)
3869                         {
3870                                 throw new NotSupportedException ("RemoveAt operation is not supported.");
3871                         }
3872
3873                         public int IndexOf (ListViewItem item)
3874                         {
3875                                 if (!owner.IsHandleCreated)
3876                                         return -1;
3877                                 return List.IndexOf (item);
3878                         }
3879
3880 #if NET_2_0
3881                         public virtual int IndexOfKey (string key)
3882                         {
3883                                 if (!owner.IsHandleCreated || key == null || key.Length == 0)
3884                                         return -1;
3885
3886                                 ArrayList selected_items = List;
3887                                 for (int i = 0; i < selected_items.Count; i++) {
3888                                         ListViewItem item = (ListViewItem) selected_items [i];
3889                                         if (String.Compare (item.Name, key, true) == 0)
3890                                                 return i;
3891                                 }
3892
3893                                 return -1;
3894                         }
3895 #endif
3896                         #endregion      // Public Methods
3897
3898                         internal ArrayList List {
3899                                 get {
3900                                         if (list == null) {
3901                                                 list = new ArrayList ();
3902                                                 foreach (ListViewItem item in owner.Items) {
3903                                                         if (item.Selected)
3904                                                                 list.Add (item);
3905                                                 }
3906                                         }
3907                                         return list;
3908                                 }
3909                         }
3910
3911                         internal void Reset ()
3912                         {
3913                                 // force re-population of list
3914                                 list = null;
3915                         }
3916
3917                         private void ItemsCollection_Changed ()
3918                         {
3919                                 Reset ();
3920                         }
3921                 }       // SelectedListViewItemCollection
3922
3923                 internal delegate void CollectionChangedHandler ();
3924
3925                 #endregion // Subclasses
3926 #if NET_2_0
3927                 protected override void OnResize (EventArgs e)
3928                 {
3929                         base.OnResize (e);
3930                 }
3931
3932                 protected override void OnMouseLeave (EventArgs e)
3933                 {
3934                         base.OnMouseLeave (e);
3935                 }
3936
3937                 //
3938                 // ColumnReorder event
3939                 //
3940                 static object ColumnReorderedEvent = new object ();
3941                 public event ColumnReorderedEventHandler ColumnReordered {
3942                         add { Events.AddHandler (ColumnReorderedEvent, value); }
3943                         remove { Events.RemoveHandler (ColumnReorderedEvent, value); }
3944                 }
3945
3946                 protected virtual void OnColumnReordered (ColumnReorderedEventArgs e)
3947                 {
3948                         ColumnReorderedEventHandler creh = (ColumnReorderedEventHandler) (Events [ColumnReorderedEvent]);
3949
3950                         if (creh != null)
3951                                 creh (this, e);
3952                 }
3953
3954                 //
3955                 // ColumnWidthChanged
3956                 //
3957                 static object ColumnWidthChangedEvent = new object ();
3958                 public event ColumnWidthChangedEventHandler ColumnWidthChanged {
3959                         add { Events.AddHandler (ColumnWidthChangedEvent, value); }
3960                         remove { Events.RemoveHandler (ColumnWidthChangedEvent, value); }
3961                 }
3962
3963                 protected virtual void OnColumnWidthChanged (ColumnWidthChangedEventArgs e)
3964                 {
3965                         ColumnWidthChangedEventHandler eh = (ColumnWidthChangedEventHandler) (Events[ColumnWidthChangedEvent]);
3966                         if (eh != null)
3967                                 eh (this, e);
3968                 }
3969
3970                 void RaiseColumnWidthChanged (int resize_column)
3971                 {
3972                         ColumnWidthChangedEventArgs n = new ColumnWidthChangedEventArgs (resize_column);
3973
3974                         OnColumnWidthChanged (n);
3975                 }
3976
3977                 //
3978                 // ColumnWidthChanging
3979                 //
3980                 static object ColumnWidthChangingEvent = new object ();
3981                 public event ColumnWidthChangingEventHandler ColumnWidthChanging {
3982                         add { Events.AddHandler (ColumnWidthChangingEvent, value); }
3983                         remove { Events.RemoveHandler (ColumnWidthChangingEvent, value); }
3984                 }
3985
3986                 protected virtual void OnColumnWidthChanging (ColumnWidthChangingEventArgs e)
3987                 {
3988                         ColumnWidthChangingEventHandler cwceh = (ColumnWidthChangingEventHandler) (Events[ColumnWidthChangingEvent]);
3989                         if (cwceh != null)
3990                                 cwceh (this, e);
3991                 }
3992
3993                 //
3994                 // 2.0 profile based implementation
3995                 //
3996                 bool CanProceedWithResize (ColumnHeader col, int width)
3997                 {
3998                         ColumnWidthChangingEventHandler cwceh = (ColumnWidthChangingEventHandler) (Events[ColumnWidthChangingEvent]);
3999                         if (cwceh == null)
4000                                 return true;
4001
4002                         ColumnWidthChangingEventArgs changing = new ColumnWidthChangingEventArgs (col.Index, width);
4003                         cwceh (this, changing);
4004                         return !changing.Cancel;
4005                 }
4006 #else
4007                 //
4008                 // 1.0 profile based implementation
4009                 //
4010                 bool CanProceedWithResize (ColumnHeader col, int width)
4011                 {
4012                         return true;
4013                 }
4014
4015                 void RaiseColumnWidthChanged (int resize_column)
4016                 {
4017                 }
4018 #endif
4019         }
4020 }