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 //
  27 // TODO:
  28 //   - Feedback for item activation, change in cursor types as mouse moves.
  29 //   - HideSelection
  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
  44 namespace System.Windows.Forms
  45 {
  46         [DefaultEvent ("SelectedIndexChanged")]
  47         [DefaultProperty ("Items")]
  48         [Designer ("System.Windows.Forms.Design.ListViewDesigner, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.IDesigner")]
  49         public class ListView : Control
  50         {
  51                 private ItemActivation activation = ItemActivation.Standard;
  52                 private ListViewAlignment alignment = ListViewAlignment.Top;
  53                 private bool allow_column_reorder = false;
  54                 private bool auto_arrange = true;
  55                 private bool check_boxes = false;
  56                 private CheckedIndexCollection checked_indices;
  57                 private CheckedListViewItemCollection checked_items;
  58                 private ColumnHeaderCollection columns;
  59                 internal ListViewItem focused_item;
  60                 private bool full_row_select = false;
  61                 private bool grid_lines = false;
  62                 private ColumnHeaderStyle header_style = ColumnHeaderStyle.Clickable;
  63                 private bool hide_selection = true;
  64                 private bool hover_selection = false;
  65                 private IComparer item_sorter;
  66                 private ListViewItemCollection items;
  67                 private bool label_edit = false;
  68                 private bool label_wrap = true;
  69                 private bool multiselect = true;
  70                 private bool scrollable = true;
  71                 private SelectedIndexCollection selected_indices;
  72                 private SelectedListViewItemCollection selected_items;
  73                 private SortOrder sort_order = SortOrder.None;
  74                 private ImageList state_image_list;
  75                 private bool updating = false;
  76                 private View view = View.LargeIcon;
  77                 private int layout_wd;    // We might draw more than our client area
  78                 private int layout_ht;    // therefore we need to have these two.
  79                 //private TextBox editor;   // Used for editing an item text
  80                 HeaderControl header_control;
  81                 internal ItemControl item_control;
  82                 internal ScrollBar h_scroll; // used for scrolling horizontally
  83                 internal ScrollBar v_scroll; // used for scrolling vertically
  84                 internal int h_marker;          // Position markers for scrolling
  85                 internal int v_marker;
  86                 private int keysearch_tickcnt;
  87                 private string keysearch_text;
  88                 static private readonly int keysearch_keydelay = 1000;
  89                 private int[] reordered_column_indices;
  90
  91                 // internal variables
  92                 internal ImageList large_image_list;
  93                 internal ImageList small_image_list;
  94                 internal Size text_size = Size.Empty;
  95
  96                 #region Events
  97                 public event LabelEditEventHandler AfterLabelEdit;
  98
  99                 [Browsable (false)]
 100                 [EditorBrowsable (EditorBrowsableState.Never)]
 101                 public new event EventHandler BackgroundImageChanged {
 102                         add { base.BackgroundImageChanged += value; }
 103                         remove { base.BackgroundImageChanged -= value; }
 104                 }
 105
 106                 public event LabelEditEventHandler BeforeLabelEdit;
 107                 public event ColumnClickEventHandler ColumnClick;
 108                 public event EventHandler ItemActivate;
 109                 public event ItemCheckEventHandler ItemCheck;
 110                 public event ItemDragEventHandler ItemDrag;
 111
 112                 [Browsable (false)]
 113                 [EditorBrowsable (EditorBrowsableState.Never)]
 114                 public new event PaintEventHandler Paint {
 115                         add { base.Paint += value; }
 116                         remove { base.Paint -= value; }
 117                 }
 118
 119                 public event EventHandler SelectedIndexChanged;
 120
 121                 [Browsable (false)]
 122                 [EditorBrowsable (EditorBrowsableState.Never)]
 123                 public new event EventHandler TextChanged {
 124                         add { base.TextChanged += value; }
 125                         remove { base.TextChanged -= value; }
 126                 }
 127
 128                 #endregion // Events
 129
 130                 #region Public Constructors
 131                 public ListView ()
 132                 {
 133                         background_color = ThemeEngine.Current.ColorWindow;
 134                         checked_indices = new CheckedIndexCollection (this);
 135                         checked_items = new CheckedListViewItemCollection (this);
 136                         columns = new ColumnHeaderCollection (this);
 137                         foreground_color = SystemColors.WindowText;
 138                         items = new ListViewItemCollection (this);
 139                         selected_indices = new SelectedIndexCollection (this);
 140                         selected_items = new SelectedListViewItemCollection (this);
 141
 142                         border_style = BorderStyle.Fixed3D;
 143
 144                         header_control = new HeaderControl (this);
 145                         header_control.Visible = false;
 146                         Controls.AddImplicit (header_control);
 147
 148                         item_control = new ItemControl (this);
 149                         Controls.AddImplicit (item_control);
 150
 151                         h_scroll = new HScrollBar ();
 152                         Controls.AddImplicit (this.h_scroll);
 153
 154                         v_scroll = new VScrollBar ();
 155                         Controls.AddImplicit (this.v_scroll);
 156
 157                         h_marker = v_marker = 0;
 158                         keysearch_tickcnt = 0;
 159
 160                         // scroll bars are disabled initially
 161                         h_scroll.Visible = false;
 162                         h_scroll.ValueChanged += new EventHandler(HorizontalScroller);
 163                         v_scroll.Visible = false;
 164                         v_scroll.ValueChanged += new EventHandler(VerticalScroller);
 165
 166                         // event handlers
 167                         base.KeyDown += new KeyEventHandler(ListView_KeyDown);
 168                         SizeChanged += new EventHandler (ListView_SizeChanged);
 169
 170                         this.SetStyle (ControlStyles.UserPaint | ControlStyles.StandardClick, false);
 171                 }
 172                 #endregion      // Public Constructors
 173
 174                 #region Private Internal Properties
 175                 internal Size CheckBoxSize {
 176                         get {
 177                                 if (this.check_boxes) {
 178                                         if (this.state_image_list != null)
 179                                                 return this.state_image_list.ImageSize;
 180                                         else
 181                                                 return ThemeEngine.Current.ListViewCheckBoxSize;
 182                                 }
 183                                 return Size.Empty;
 184                         }
 185                 }
 186
 187                 bool multiselecting;
 188
 189                 bool CanMultiselect {
 190                         get {
 191                                 if (multiselecting)
 192                                         return true;
 193                                 else if (multiselect && (XplatUI.State.ModifierKeys & (Keys.Control | Keys.Shift)) != 0)
 194                                         return true;
 195                                 else
 196                                         return false;
 197                         }
 198                 }
 199
 200                 #endregion      // Private Internal Properties
 201
 202                 #region  Protected Properties
 203                 protected override CreateParams CreateParams {
 204                         get { return base.CreateParams; }
 205                 }
 206
 207                 protected override Size DefaultSize {
 208                         get { return ThemeEngine.Current.ListViewDefaultSize; }
 209                 }
 210                 #endregion      // Protected Properties
 211
 212                 #region Public Instance Properties
 213                 [DefaultValue (ItemActivation.Standard)]
 214                 public ItemActivation Activation {
 215                         get { return activation; }
 216                         set {
 217                                 if (value != ItemActivation.Standard && value != ItemActivation.OneClick &&
 218                                         value != ItemActivation.TwoClick) {
 219                                         throw new InvalidEnumArgumentException (string.Format
 220                                                 ("Enum argument value '{0}' is not valid for Activation", value));
 221                                 }
 222
 223                                 activation = value;
 224                         }
 225                 }
 226
 227                 [DefaultValue (ListViewAlignment.Top)]
 228                 [Localizable (true)]
 229                 public ListViewAlignment Alignment {
 230                         get { return alignment; }
 231                         set {
 232                                 if (value != ListViewAlignment.Default && value != ListViewAlignment.Left &&
 233                                         value != ListViewAlignment.SnapToGrid && value != ListViewAlignment.Top) {
 234                                         throw new InvalidEnumArgumentException (string.Format
 235                                                 ("Enum argument value '{0}' is not valid for Alignment", value));
 236                                 }
 237
 238                                 if (this.alignment != value) {
 239                                         alignment = value;
 240                                         // alignment does not matter in Details/List views
 241                                         if (this.view == View.LargeIcon ||
 242                                             this.View == View.SmallIcon)
 243                                                 this.Redraw (true);
 244                                 }
 245                         }
 246                 }
 247
 248                 [DefaultValue (false)]
 249                 public bool AllowColumnReorder {
 250                         get { return allow_column_reorder; }
 251                         set { allow_column_reorder = value; }
 252                 }
 253
 254                 [DefaultValue (true)]
 255                 public bool AutoArrange {
 256                         get { return auto_arrange; }
 257                         set {
 258                                 if (auto_arrange != value) {
 259                                         auto_arrange = value;
 260                                         // autoarrange does not matter in Details/List views
 261                                         if (this.view == View.LargeIcon || this.View == View.SmallIcon)
 262                                                 this.Redraw (true);
 263                                 }
 264                         }
 265                 }
 266
 267                 public override Color BackColor {
 268                         get {
 269                                 if (background_color.IsEmpty)
 270                                         return ThemeEngine.Current.ColorWindow;
 271                                 else
 272                                         return background_color;
 273                         }
 274                         set { background_color = value; }
 275                 }
 276
 277                 [Browsable (false)]
 278                 [EditorBrowsable (EditorBrowsableState.Never)]
 279                 public override Image BackgroundImage {
 280                         get { return background_image; }
 281                         set {
 282                                 if (value == background_image)
 283                                         return;
 284
 285                                 background_image = value;
 286                                 OnBackgroundImageChanged (EventArgs.Empty);
 287                         }
 288                 }
 289
 290                 [DefaultValue (BorderStyle.Fixed3D)]
 291                 [DispId (-504)]
 292                 public BorderStyle BorderStyle {
 293                         get { return InternalBorderStyle; }
 294                         set { InternalBorderStyle = value; }
 295                 }
 296
 297                 [DefaultValue (false)]
 298                 public bool CheckBoxes {
 299                         get { return check_boxes; }
 300                         set {
 301                                 if (check_boxes != value) {
 302                                         check_boxes = value;
 303                                         this.Redraw (true);
 304                                 }
 305                         }
 306                 }
 307
 308                 [Browsable (false)]
 309                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 310                 public CheckedIndexCollection CheckedIndices {
 311                         get { return checked_indices; }
 312                 }
 313
 314                 [Browsable (false)]
 315                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 316                 public CheckedListViewItemCollection CheckedItems {
 317                         get { return checked_items; }
 318                 }
 319
 320                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
 321                 [Localizable (true)]
 322                 [MergableProperty (false)]
 323                 public ColumnHeaderCollection Columns {
 324                         get { return columns; }
 325                 }
 326
 327                 [Browsable (false)]
 328                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 329                 public ListViewItem FocusedItem {
 330                         get {
 331                                 if (focused_item == null && Focused && items.Count > 0)
 332                                         focused_item = items [0];
 333                                 return focused_item;
 334                         }
 335                 }
 336
 337                 public override Color ForeColor {
 338                         get {
 339                                 if (foreground_color.IsEmpty)
 340                                         return ThemeEngine.Current.ColorWindowText;
 341                                 else
 342                                         return foreground_color;
 343                         }
 344                         set { foreground_color = value; }
 345                 }
 346
 347                 [DefaultValue (false)]
 348                 public bool FullRowSelect {
 349                         get { return full_row_select; }
 350                         set { full_row_select = value; }
 351                 }
 352
 353                 [DefaultValue (false)]
 354                 public bool GridLines {
 355                         get { return grid_lines; }
 356                         set {
 357                                 if (grid_lines != value) {
 358                                         grid_lines = value;
 359                                         this.Redraw (false);
 360                                 }
 361                         }
 362                 }
 363
 364                 [DefaultValue (ColumnHeaderStyle.Clickable)]
 365                 public ColumnHeaderStyle HeaderStyle {
 366                         get { return header_style; }
 367                         set {
 368                                 if (header_style == value)
 369                                         return;
 370
 371                                 switch (value) {
 372                                 case ColumnHeaderStyle.Clickable:
 373                                 case ColumnHeaderStyle.Nonclickable:
 374                                 case ColumnHeaderStyle.None:
 375                                         break;
 376                                 default:
 377                                         throw new InvalidEnumArgumentException (string.Format
 378                                                 ("Enum argument value '{0}' is not valid for ColumnHeaderStyle", value));
 379                                 }
 380
 381                                 header_style = value;
 382                                 if (view == View.Details)
 383                                         Redraw (true);
 384                         }
 385                 }
 386
 387                 [DefaultValue (true)]
 388                 public bool HideSelection {
 389                         get { return hide_selection; }
 390                         set {
 391                                 if (hide_selection != value) {
 392                                         hide_selection = value;
 393                                         this.Redraw (false);
 394                                 }
 395                         }
 396                 }
 397
 398                 [DefaultValue (false)]
 399                 public bool HoverSelection {
 400                         get { return hover_selection; }
 401                         set { hover_selection = value; }
 402                 }
 403
 404                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
 405                 [Localizable (true)]
 406                 [MergableProperty (false)]
 407                 public ListViewItemCollection Items {
 408                         get { return items; }
 409                 }
 410
 411                 [DefaultValue (false)]
 412                 public bool LabelEdit {
 413                         get { return label_edit; }
 414                         set { label_edit = value; }
 415                 }
 416
 417                 [DefaultValue (true)]
 418                 [Localizable (true)]
 419                 public bool LabelWrap {
 420                         get { return label_wrap; }
 421                         set {
 422                                 if (label_wrap != value) {
 423                                         label_wrap = value;
 424                                         this.Redraw (true);
 425                                 }
 426                         }
 427                 }
 428
 429                 [DefaultValue (null)]
 430                 public ImageList LargeImageList {
 431                         get { return large_image_list; }
 432                         set {
 433                                 large_image_list = value;
 434                                 this.Redraw (true);
 435                         }
 436                 }
 437
 438                 [Browsable (false)]
 439                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 440                 public IComparer ListViewItemSorter {
 441                         get { return item_sorter; }
 442                         set { item_sorter = value; }
 443                 }
 444
 445                 [DefaultValue (true)]
 446                 public bool MultiSelect {
 447                         get { return multiselect; }
 448                         set { multiselect = value; }
 449                 }
 450
 451                 [DefaultValue (true)]
 452                 public bool Scrollable {
 453                         get { return scrollable; }
 454                         set {
 455                                 if (scrollable != value) {
 456                                         scrollable = value;
 457                                         this.Redraw (true);
 458                                 }
 459                         }
 460                 }
 461
 462                 [Browsable (false)]
 463                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 464                 public SelectedIndexCollection SelectedIndices {
 465                         get { return selected_indices; }
 466                 }
 467
 468                 [Browsable (false)]
 469                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 470                 public SelectedListViewItemCollection SelectedItems {
 471                         get { return selected_items; }
 472                 }
 473
 474 #if NET_2_0
 475                 [MonoTODO("Implement")]
 476                 public bool ShowGroups {
 477                         get {
 478                                 return false;
 479                         }
 480
 481                         set {
 482                         }
 483                 }
 484 #endif
 485
 486                 [DefaultValue (null)]
 487                 public ImageList SmallImageList {
 488                         get { return small_image_list; }
 489                         set {
 490                                 small_image_list = value;
 491                                 this.Redraw (true);
 492                         }
 493                 }
 494
 495                 [DefaultValue (SortOrder.None)]
 496                 public SortOrder Sorting {
 497                         get { return sort_order; }
 498                         set {
 499                                 if (value != SortOrder.Ascending && value != SortOrder.Descending  &&
 500                                         value != SortOrder.None) {
 501                                         throw new InvalidEnumArgumentException (string.Format
 502                                                 ("Enum argument value '{0}' is not valid for Sorting", value));
 503                                 }
 504
 505                                 if (sort_order != value)  {
 506                                         sort_order = value;
 507                                         this.Redraw (false);
 508                                 }
 509                         }
 510                 }
 511
 512                 [DefaultValue (null)]
 513                 public ImageList StateImageList {
 514                         get { return state_image_list; }
 515                         set {
 516                                 state_image_list = value;
 517                                 this.Redraw (true);
 518                         }
 519                 }
 520
 521                 [Bindable (false)]
 522                 [Browsable (false)]
 523                 [EditorBrowsable (EditorBrowsableState.Never)]
 524                 public override string Text {
 525                         get { return text; }
 526                         set {
 527                                 if (value == text)
 528                                         return;
 529
 530                                 text = value;
 531                                 this.Redraw (true);
 532
 533                                 OnTextChanged (EventArgs.Empty);
 534                         }
 535                 }
 536
 537                 [Browsable (false)]
 538                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 539                 public ListViewItem TopItem {
 540                         get {
 541                                 // there is no item
 542                                 if (this.items.Count == 0)
 543                                         return null;
 544                                 // if contents are not scrolled
 545                                 // it is the first item
 546                                 else if (h_marker == 0 && v_marker == 0)
 547                                         return this.items [0];
 548                                 // do a hit test for the scrolled position
 549                                 else {
 550                                         foreach (ListViewItem item in this.items) {
 551                                                 if (item.Bounds.X >= 0 && item.Bounds.Y >= 0)
 552                                                         return item;
 553                                         }
 554                                         return null;
 555                                 }
 556                         }
 557                 }
 558
 559 #if NET_2_0
 560                 [MonoTODO("Implement")]
 561                 public bool UseCompatibleStateImageBehavior {
 562                         get {
 563                                 return false;
 564                         }
 565
 566                         set {
 567                         }
 568                 }
 569 #endif
 570
 571                 [DefaultValue (View.LargeIcon)]
 572                 public View View {
 573                         get { return view; }
 574                         set {
 575                                 if (value != View.Details && value != View.LargeIcon  &&
 576                                         value != View.List  && value != View.SmallIcon  ) {
 577                                         throw new InvalidEnumArgumentException (string.Format
 578                                                 ("Enum argument value '{0}' is not valid for View", value));
 579                                 }
 580
 581                                 if (view != value) {
 582                                         h_scroll.Value = v_scroll.Value = 0;
 583                                         view = value;
 584                                         Redraw (true);
 585                                 }
 586                         }
 587                 }
 588                 #endregion      // Public Instance Properties
 589
 590                 #region Internal Methods Properties
 591
 592                 internal int FirstVisibleIndex {
 593                         get {
 594                                 // there is no item
 595                                 if (this.items.Count == 0)
 596                                         return 0;
 597
 598                                 if (h_marker == 0 && v_marker == 0)
 599                                         return 0;
 600
 601                                 foreach (ListViewItem item in this.items) {
 602                                         if (item.Bounds.Right >= 0 && item.Bounds.Bottom >= 0)
 603                                                 return item.Index;
 604                                 }
 605                                 return 0;
 606
 607                         }
 608                 }
 609
 610
 611                 internal int LastVisibleIndex {
 612                         get {
 613                                 for (int i = FirstVisibleIndex; i < Items.Count; i++) {
 614                                         if (View == View.List || Alignment == ListViewAlignment.Left) {
 615                                                 if (Items[i].Bounds.X > ClientRectangle.Right)
 616                                                         return i - 1;
 617                                         } else {
 618                                                 if (Items[i].Bounds.Y > ClientRectangle.Bottom)
 619                                                         return i - 1;
 620                                         }
 621                                 }
 622
 623                                 return Items.Count - 1;
 624                         }
 625                 }
 626
 627                 internal int TotalWidth {
 628                         get { return Math.Max (this.Width, this.layout_wd); }
 629                 }
 630
 631                 internal int TotalHeight {
 632                         get { return Math.Max (this.Height, this.layout_ht); }
 633                 }
 634
 635                 internal void Redraw (bool recalculate)
 636                 {
 637                         // Avoid calculations when control is being updated
 638                         if (this.updating)
 639                                 return;
 640
 641                         if (recalculate)
 642                                 CalculateListView (this.alignment);
 643
 644                         Refresh ();
 645                 }
 646
 647                 internal Size GetChildColumnSize (int index)
 648                 {
 649                         Size ret_size = Size.Empty;
 650                         ColumnHeader col = this.columns [index];
 651
 652                         if (col.Width == -2) { // autosize = max(items, columnheader)
 653                                 Size size = Size.Ceiling (this.DeviceContext.MeasureString
 654                                                           (col.Text, this.Font));
 655                                 ret_size = BiggestItem (index);
 656                                 if (size.Width > ret_size.Width)
 657                                         ret_size = size;
 658                         }
 659                         else { // -1 and all the values < -2 are put under one category
 660                                 ret_size = BiggestItem (index);
 661                                 // fall back to empty columns' width if no subitem is available for a column
 662                                 if (ret_size.IsEmpty) {
 663                                         ret_size.Width = ThemeEngine.Current.ListViewEmptyColumnWidth;
 664                                         if (col.Text.Length > 0)
 665                                                 ret_size.Height = Size.Ceiling (this.DeviceContext.MeasureString
 666                                                                                 (col.Text, this.Font)).Height;
 667                                         else
 668                                                 ret_size.Height = this.Font.Height;
 669                                 }
 670                         }
 671
 672                         // adjust the size for icon and checkbox for 0th column
 673                         if (index == 0) {
 674                                 ret_size.Width += (this.CheckBoxSize.Width + 4);
 675                                 if (this.small_image_list != null)
 676                                         ret_size.Width += this.small_image_list.ImageSize.Width;
 677                         }
 678                         return ret_size;
 679                 }
 680
 681                 // Returns the size of biggest item text in a column.
 682                 private Size BiggestItem (int col)
 683                 {
 684                         Size temp = Size.Empty;
 685                         Size ret_size = Size.Empty;
 686
 687                         // 0th column holds the item text, we check the size of
 688                         // the various subitems falling in that column and get
 689                         // the biggest one's size.
 690                         foreach (ListViewItem item in items) {
 691                                 if (col >= item.SubItems.Count)
 692                                         continue;
 693
 694                                 temp = Size.Ceiling (this.DeviceContext.MeasureString
 695                                                      (item.SubItems [col].Text, this.Font));
 696                                 if (temp.Width > ret_size.Width)
 697                                         ret_size = temp;
 698                         }
 699
 700                         // adjustment for space
 701                         if (!ret_size.IsEmpty)
 702                                 ret_size.Width += 4;
 703
 704                         return ret_size;
 705                 }
 706
 707                 // Sets the size of the biggest item text as per the view
 708                 private void CalcTextSize ()
 709                 {
 710                         // clear the old value
 711                         text_size = Size.Empty;
 712
 713                         if (items.Count == 0)
 714                                 return;
 715
 716                         text_size = BiggestItem (0);
 717
 718                         if (view == View.LargeIcon && this.label_wrap) {
 719                                 Size temp = Size.Empty;
 720                                 if (this.check_boxes)
 721                                         temp.Width += 2 * this.CheckBoxSize.Width;
 722                                 if (large_image_list != null)
 723                                         temp.Width += large_image_list.ImageSize.Width;
 724                                 if (temp.Width == 0)
 725                                         temp.Width = 43;
 726                                 // wrapping is done for two lines only
 727                                 if (text_size.Width > temp.Width) {
 728                                         text_size.Width = temp.Width;
 729                                         text_size.Height *= 2;
 730                                 }
 731                         }
 732                         else if (view == View.List) {
 733                                 // in list view max text shown in determined by the
 734                                 // control width, even if scolling is enabled.
 735                                 int max_wd = this.Width - (this.CheckBoxSize.Width - 2);
 736                                 if (this.small_image_list != null)
 737                                         max_wd -= this.small_image_list.ImageSize.Width;
 738
 739                                 if (text_size.Width > max_wd)
 740                                         text_size.Width = max_wd;
 741                         }
 742
 743                         // we do the default settings, if we have got 0's
 744                         if (text_size.Height <= 0)
 745                                 text_size.Height = this.Font.Height;
 746                         if (text_size.Width <= 0)
 747                                 text_size.Width = this.Width;
 748
 749                         // little adjustment
 750                         text_size.Width += 4;
 751                         text_size.Height += 2;
 752                 }
 753
 754                 private void Scroll (ScrollBar scrollbar, int delta)
 755                 {
 756                         if (delta == 0 || !scrollbar.Visible)
 757                                 return;
 758
 759                         int max;
 760                         if (scrollbar == h_scroll)
 761                                 max = h_scroll.Maximum - item_control.Width;
 762                         else
 763                                 max = v_scroll.Maximum - item_control.Height;
 764
 765                         int val = scrollbar.Value + delta;
 766                         if (val > max)
 767                                 val = max;
 768                         else if (val < scrollbar.Minimum)
 769                                 val = scrollbar.Minimum;
 770                         scrollbar.Value = val;
 771                 }
 772
 773                 private void CalculateScrollBars ()
 774                 {
 775                         Rectangle client_area = ClientRectangle;
 776
 777                         if (!this.scrollable || this.items.Count <= 0) {
 778                                 h_scroll.Visible = false;
 779                                 v_scroll.Visible = false;
 780                                 return;
 781                         }
 782
 783                         // making a scroll bar visible might make
 784                         // other scroll bar visible
 785                         if (layout_wd > client_area.Right) {
 786                                 h_scroll.Visible = true;
 787                                 if ((layout_ht + h_scroll.Height) > client_area.Bottom)
 788                                         v_scroll.Visible = true;
 789                                 else
 790                                         v_scroll.Visible = false;
 791                         } else if (layout_ht > client_area.Bottom) {
 792                                 v_scroll.Visible = true;
 793                                 if ((layout_wd + v_scroll.Width) > client_area.Right)
 794                                         h_scroll.Visible = true;
 795                                 else
 796                                         h_scroll.Visible = false;
 797                         } else {
 798                                 h_scroll.Visible = false;
 799                                 v_scroll.Visible = false;
 800                         }
 801
 802                         item_control.Height = ClientRectangle.Height - header_control.Height;
 803
 804                         if (h_scroll.Visible) {
 805                                 h_scroll.Location = new Point (client_area.X, client_area.Bottom - h_scroll.Height);
 806                                 h_scroll.Minimum = 0;
 807
 808                                 // if v_scroll is visible, adjust the maximum of the
 809                                 // h_scroll to account for the width of v_scroll
 810                                 if (v_scroll.Visible) {
 811                                         h_scroll.Maximum = layout_wd + v_scroll.Width;
 812                                         h_scroll.Width = client_area.Width - v_scroll.Width;
 813                                 }
 814                                 else {
 815                                         h_scroll.Maximum = layout_wd;
 816                                         h_scroll.Width = client_area.Width;
 817                                 }
 818
 819                                 h_scroll.LargeChange = client_area.Width;
 820                                 h_scroll.SmallChange = Font.Height;
 821                                 item_control.Height -= h_scroll.Height;
 822                         }
 823
 824                         if (header_control.Visible)
 825                                 header_control.Width = ClientRectangle.Width;
 826                         item_control.Width = ClientRectangle.Width;
 827
 828                         if (v_scroll.Visible) {
 829                                 v_scroll.Location = new Point (client_area.Right - v_scroll.Width, client_area.Y);
 830                                 v_scroll.Minimum = 0;
 831
 832                                 // if h_scroll is visible, adjust the maximum of the
 833                                 // v_scroll to account for the height of h_scroll
 834                                 if (h_scroll.Visible) {
 835                                         v_scroll.Maximum = layout_ht + h_scroll.Height;
 836                                         v_scroll.Height = client_area.Height; // - h_scroll.Height already done
 837                                 } else {
 838                                         v_scroll.Maximum = layout_ht;
 839                                         v_scroll.Height = client_area.Height;
 840                                 }
 841
 842                                 v_scroll.LargeChange = client_area.Height;
 843                                 v_scroll.SmallChange = Font.Height;
 844                                 if (header_control.Visible)
 845                                         header_control.Width -= v_scroll.Width;
 846                                 item_control.Width -= v_scroll.Width;
 847                         }
 848                 }
 849
 850                 ColumnHeader GetReorderedColumn (int index)
 851                 {
 852                         if (reordered_column_indices == null)
 853                                 return Columns [index];
 854                         else
 855                                 return Columns [reordered_column_indices [index]];
 856                 }
 857
 858                 void ReorderColumn (ColumnHeader col, int index)
 859                 {
 860                         if (reordered_column_indices == null) {
 861                                 reordered_column_indices = new int [Columns.Count];
 862                                 for (int i = 0; i < Columns.Count; i++)
 863                                         reordered_column_indices [i] = i;
 864                         }
 865
 866                         if (reordered_column_indices [index] == col.Index)
 867                                 return;
 868
 869                         int[] curr = reordered_column_indices;
 870                         int[] result = new int [Columns.Count];
 871                         int curr_idx = 0;
 872                         for (int i = 0; i < Columns.Count; i++) {
 873                                 if (curr_idx < Columns.Count && curr [curr_idx] == col.Index)
 874                                         curr_idx++;
 875
 876                                 if (i == index)
 877                                         result [i] = col.Index;
 878                                 else
 879                                         result [i] = curr [curr_idx++];
 880                         }
 881
 882                         reordered_column_indices = result;
 883                         LayoutDetails ();
 884                         header_control.Invalidate ();
 885                         item_control.Invalidate ();
 886                 }
 887
 888                 Size LargeIconItemSize {
 889                         get {
 890                                 int image_w = LargeImageList == null ? 12 : LargeImageList.ImageSize.Width;
 891                                 int image_h = LargeImageList == null ? 2 : LargeImageList.ImageSize.Height;
 892                                 int w = CheckBoxSize.Width + 2 + Math.Max (text_size.Width, image_w);
 893                                 int h = text_size.Height + 2 + Math.Max (CheckBoxSize.Height, image_h);
 894                                 return new Size (w, h);
 895                         }
 896                 }
 897
 898                 Size SmallIconItemSize {
 899                         get {
 900                                 int image_w = SmallImageList == null ? 0 : SmallImageList.ImageSize.Width;
 901                                 int image_h = SmallImageList == null ? 0 : SmallImageList.ImageSize.Height;
 902                                 int w = text_size.Width + 2 + CheckBoxSize.Width + image_w;
 903                                 int h = Math.Max (text_size.Height, Math.Max (CheckBoxSize.Height, image_h));
 904                                 return new Size (w, h);
 905                         }
 906                 }
 907
 908                 int rows;
 909                 int cols;
 910                 ListViewItem[,] item_matrix;
 911
 912                 void LayoutIcons (bool large_icons, bool left_aligned, int x_spacing, int y_spacing)
 913                 {
 914                         header_control.Visible = false;
 915                         header_control.Size = Size.Empty;
 916                         item_control.Location = Point.Empty;
 917
 918                         if (items.Count == 0)
 919                                 return;
 920
 921                         Size sz = large_icons ? LargeIconItemSize : SmallIconItemSize;
 922
 923                         Rectangle area = ClientRectangle;
 924
 925                         if (left_aligned) {
 926                                 rows = (int) Math.Floor ((double)(area.Height - h_scroll.Height + y_spacing) / (double)(sz.Height + y_spacing));
 927                                 if (rows <= 0)
 928                                         rows = 1;
 929                                 cols = (int) Math.Ceiling ((double)items.Count / (double)rows);
 930                         } else {
 931                                 cols = (int) Math.Floor ((double)(area.Width - v_scroll.Width + x_spacing) / (double)(sz.Width + x_spacing));
 932                                 if (cols <= 0)
 933                                         cols = 1;
 934                                 rows = (int) Math.Ceiling ((double)items.Count / (double)cols);
 935                         }
 936
 937                         layout_ht = rows * (sz.Height + y_spacing) - y_spacing;
 938                         layout_wd = cols * (sz.Width + x_spacing) - x_spacing;
 939                         item_matrix = new ListViewItem [rows, cols];
 940                         int row = 0;
 941                         int col = 0;
 942                         foreach (ListViewItem item in items) {
 943                                 int x = col * (sz.Width + x_spacing);
 944                                 int y = row * (sz.Height + y_spacing);
 945                                 item.Location = new Point (x, y);
 946                                 item.Layout ();
 947                                 item.row = row;
 948                                 item.col = col;
 949                                 item_matrix [row, col] = item;
 950                                 if (left_aligned) {
 951                                         if (++row == rows) {
 952                                                 row = 0;
 953                                                 col++;
 954                                         }
 955                                 } else {
 956                                         if (++col == cols) {
 957                                                 col = 0;
 958                                                 row++;
 959                                         }
 960                                 }
 961                         }
 962
 963                         item_control.Size = new Size (layout_wd, layout_ht);
 964                 }
 965
 966                 void LayoutHeader ()
 967                 {
 968                         if (columns.Count == 0 || header_style == ColumnHeaderStyle.None) {
 969                                 header_control.Visible = false;
 970                                 header_control.Size = Size.Empty;
 971                                 return;
 972                         }
 973
 974                         int x = 0;
 975                         for (int i = 0; i < Columns.Count; i++) {
 976                                 ColumnHeader col = GetReorderedColumn (i);
 977                                 col.X = x;
 978                                 col.Y = 0;
 979                                 col.CalcColumnHeader ();
 980                                 x += col.Wd;
 981                         }
 982
 983                         if (x < ClientRectangle.Width)
 984                                 x = ClientRectangle.Width;
 985
 986                         header_control.Width = x;
 987                         header_control.Height = columns [0].Ht;
 988                         header_control.is_visible = true;
 989                 }
 990
 991                 void LayoutDetails ()
 992                 {
 993                         LayoutHeader ();
 994
 995                         item_control.Location = new Point (0, header_control.Height);
 996
 997                         int y = 0;
 998                         if (items.Count > 0) {
 999                                 foreach (ListViewItem item in items) {
1000                                         item.Layout ();
1001                                         item.Location = new Point (0, y);
1002                                         y += item.Bounds.Height + 2;
1003                                 }
1004
1005                                 // some space for bottom gridline
1006                                 if (grid_lines)
1007                                         y += 2;
1008                         }
1009
1010                         layout_wd = Math.Max (header_control.Width, item_control.Width);
1011                         layout_ht = y + header_control.Height;
1012                 }
1013
1014                 private void CalculateListView (ListViewAlignment align)
1015                 {
1016                         CalcTextSize ();
1017
1018                         switch (view) {
1019                         case View.Details:
1020                                 LayoutDetails ();
1021                                 break;
1022
1023                         case View.SmallIcon:
1024                                 LayoutIcons (false, alignment == ListViewAlignment.Left, 4, 2);
1025                                 break;
1026
1027                         case View.LargeIcon:
1028                                 LayoutIcons (true, alignment == ListViewAlignment.Left,
1029                                              ThemeEngine.Current.ListViewHorizontalSpacing,
1030                                              ThemeEngine.Current.ListViewVerticalSpacing);
1031                                 break;
1032
1033                         case View.List:
1034                                 LayoutIcons (false, true, 4, 2);
1035                                 break;
1036                         }
1037
1038                         CalculateScrollBars ();
1039                 }
1040
1041                 internal void UpdateSelection (ListViewItem item)
1042                 {
1043                         if (item.Selected) {
1044
1045                                 if (!CanMultiselect && SelectedItems.Count > 0) {
1046                                         SelectedItems.Clear ();
1047                                         SelectedIndices.list.Clear ();
1048                                 }
1049
1050                                 if (!SelectedItems.Contains (item)) {
1051                                         SelectedItems.list.Add (item);
1052                                         SelectedIndices.list.Add (item.Index);
1053                                 }
1054                         } else {
1055                                 SelectedItems.list.Remove (item);
1056                                 SelectedIndices.list.Remove (item.Index);
1057                         }
1058                 }
1059
1060                 private bool KeySearchString (KeyEventArgs ke)
1061                 {
1062                         int current_tickcnt = Environment.TickCount;
1063                         if (keysearch_tickcnt > 0 && current_tickcnt - keysearch_tickcnt > keysearch_keydelay) {
1064                                 keysearch_text = string.Empty;
1065                         }
1066
1067                         keysearch_text += (char) ke.KeyData;
1068                         keysearch_tickcnt = current_tickcnt;
1069
1070                         int start = FocusedItem == null ? 0 : FocusedItem.Index;
1071                         int i = start;
1072                         while (true) {
1073                                 if (CultureInfo.CurrentCulture.CompareInfo.IsPrefix (Items[i].Text, keysearch_text,
1074                                         CompareOptions.IgnoreCase)) {
1075                                         SetFocusedItem (Items [i]);
1076                                         items [i].Selected = true;
1077                                         EnsureVisible (i);
1078                                         break;
1079                                 }
1080                                 i = (i + 1  < Items.Count) ? i+1 : 0;
1081
1082                                 if (i == start)
1083                                         break;
1084                         }
1085                         return true;
1086                 }
1087
1088                 int GetAdjustedIndex (Keys key)
1089                 {
1090                         int result = -1;
1091
1092                         if (View == View.Details) {
1093                                 if (key == Keys.Up)
1094                                         result = FocusedItem.Index - 1;
1095                                 else if (key == Keys.Down) {
1096                                         result = FocusedItem.Index + 1;
1097                                         if (result == items.Count)
1098                                                 result = -1;
1099                                 }
1100                                 return result;
1101                         }
1102
1103                         int row = FocusedItem.row;
1104                         int col = FocusedItem.col;
1105
1106                         switch (key) {
1107                         case Keys.Left:
1108                                 if (col == 0)
1109                                         return -1;
1110                                 return item_matrix [row, col - 1].Index;
1111
1112                         case Keys.Right:
1113                                 if (col == (cols - 1))
1114                                         return -1;
1115                                 while (item_matrix [row, col + 1] == null)
1116                                        row--;
1117                                 return item_matrix [row, col + 1].Index;
1118
1119                         case Keys.Up:
1120                                 if (row == 0)
1121                                         return -1;
1122                                 return item_matrix [row - 1, col].Index;
1123
1124                         case Keys.Down:
1125                                 if (row == (rows - 1))
1126                                         return -1;
1127                                 while (item_matrix [row + 1, col] == null)
1128                                        col--;
1129                                 return item_matrix [row + 1, col].Index;
1130
1131                         default:
1132                                 return -1;
1133                         }
1134                 }
1135
1136                 ListViewItem selection_start;
1137
1138                 private void SelectItems (ArrayList sel_items)
1139                 {
1140                         multiselecting = true;
1141                         ArrayList curr_items = (ArrayList) SelectedItems.list.Clone ();
1142                         foreach (ListViewItem item in curr_items)
1143                                 if (!sel_items.Contains (item))
1144                                         item.Selected = false;
1145                         foreach (ListViewItem item in sel_items)
1146                                 item.Selected = true;
1147                         multiselecting = false;
1148                 }
1149
1150                 private void UpdateMultiSelection (int index)
1151                 {
1152                         bool shift_pressed = (XplatUI.State.ModifierKeys & Keys.Shift) != 0;
1153                         bool ctrl_pressed = (XplatUI.State.ModifierKeys & Keys.Control) != 0;
1154                         ListViewItem item = items [index];
1155
1156                         if (shift_pressed && selection_start != null) {
1157                                 ArrayList list = new ArrayList ();
1158                                 int start = Math.Min (selection_start.Index, index);
1159                                 int end = Math.Max (selection_start.Index, index);
1160                                 if (View == View.Details) {
1161                                         for (int i = start; i <= end; i++)
1162                                                 list.Add (items [i]);
1163                                 } else {
1164                                         int left = Math.Min (items [start].col, items [end].col);
1165                                         int right = Math.Max (items [start].col, items [end].col);
1166                                         int top = Math.Min (items [start].row, items [end].row);
1167                                         int bottom = Math.Max (items [start].row, items [end].row);
1168                                         foreach (ListViewItem curr in items)
1169                                                 if (curr.row >= top && curr.row <= bottom &&
1170                                                     curr.col >= left && curr.col <= right)
1171                                                         list.Add (curr);
1172                                 }
1173                                 SelectItems (list);
1174                         } else if (!ctrl_pressed) {
1175                                 SelectedItems.Clear ();
1176                                 SelectedIndices.list.Clear ();
1177                                 item.Selected = true;
1178                                 selection_start = item;
1179                         }
1180                 }
1181
1182                 private void ListView_KeyDown (object sender, KeyEventArgs ke)
1183                 {
1184                         if (ke.Handled || Items.Count == 0)
1185                                 return;
1186
1187                         int index = -1;
1188                         ke.Handled = true;
1189
1190                         switch (ke.KeyCode) {
1191
1192                         case Keys.End:
1193                                 index = Items.Count - 1;
1194                                 break;
1195
1196                         case Keys.Home:
1197                                 index = 0;
1198                                 break;
1199
1200                         case Keys.Left:
1201                         case Keys.Right:
1202                         case Keys.Up:
1203                         case Keys.Down:
1204                                 index = GetAdjustedIndex (ke.KeyCode);
1205                                 break;
1206
1207                         default:
1208                                 ke.Handled = KeySearchString (ke);
1209                                 return;
1210                         }
1211
1212                         if (index == -1)
1213                                 return;
1214
1215                         if (MultiSelect)
1216                                 UpdateMultiSelection (index);
1217                         else
1218                                 items [index].Selected = true;
1219
1220                         SetFocusedItem (items [index]);
1221                         EnsureVisible (index);
1222                 }
1223
1224
1225                 internal class ItemControl : Control {
1226
1227                         ListView owner;
1228                         ListViewItem clicked_item;
1229                         ListViewItem last_clicked_item;
1230                         bool hover_processed = false;
1231
1232                         public ItemControl (ListView owner)
1233                         {
1234                                 this.owner = owner;
1235                                 DoubleClick += new EventHandler(ItemsDoubleClick);
1236                                 KeyDown += new KeyEventHandler (ItemsKeyDown);
1237                                 KeyUp += new KeyEventHandler (ItemsKeyUp);
1238                                 MouseDown += new MouseEventHandler(ItemsMouseDown);
1239                                 MouseMove += new MouseEventHandler(ItemsMouseMove);
1240                                 MouseHover += new EventHandler(ItemsMouseHover);
1241                                 MouseUp += new MouseEventHandler(ItemsMouseUp);
1242                                 MouseWheel += new MouseEventHandler(ItemsMouseWheel);
1243                         }
1244
1245                         void ItemsDoubleClick (object sender, EventArgs e)
1246                         {
1247                                 if (owner.activation == ItemActivation.Standard && owner.ItemActivate != null)
1248                                         owner.ItemActivate (this, e);
1249                         }
1250
1251                         void ItemsKeyDown (object sender, KeyEventArgs args)
1252                         {
1253                                 owner.OnKeyDown (args);
1254                         }
1255
1256                         void ItemsKeyUp (object sender, KeyEventArgs args)
1257                         {
1258                                 owner.OnKeyUp (args);
1259                         }
1260
1261                         enum BoxSelect {
1262                                 None,
1263                                 Normal,
1264                                 Shift,
1265                                 Control
1266                         }
1267
1268                         BoxSelect box_select_mode = BoxSelect.None;
1269                         ArrayList prev_selection;
1270                         Point box_select_start;
1271
1272                         Rectangle box_select_rect;
1273                         internal Rectangle BoxSelectRectangle {
1274                                 get { return box_select_rect; }
1275                                 set {
1276                                         if (box_select_rect == value)
1277                                                 return;
1278
1279                                         InvalidateBoxSelectRect ();
1280                                         box_select_rect = value;
1281                                         InvalidateBoxSelectRect ();
1282                                 }
1283                         }
1284
1285                         void InvalidateBoxSelectRect ()
1286                         {
1287                                 if (BoxSelectRectangle.Size.IsEmpty)
1288                                         return;
1289
1290                                 Rectangle edge = BoxSelectRectangle;
1291                                 edge.X -= 1;
1292                                 edge.Y -= 1;
1293                                 edge.Width += 2;
1294                                 edge.Height = 2;
1295                                 Invalidate (edge);
1296                                 edge.Y = BoxSelectRectangle.Bottom - 1;
1297                                 Invalidate (edge);
1298                                 edge.Y = BoxSelectRectangle.Y - 1;
1299                                 edge.Width = 2;
1300                                 edge.Height = BoxSelectRectangle.Height + 2;
1301                                 Invalidate (edge);
1302                                 edge.X = BoxSelectRectangle.Right - 1;
1303                                 Invalidate (edge);
1304                         }
1305
1306                         private Rectangle CalculateBoxSelectRectangle (Point pt)
1307                         {
1308                                 int left = Math.Min (box_select_start.X, pt.X);
1309                                 int right = Math.Max (box_select_start.X, pt.X);
1310                                 int top = Math.Min (box_select_start.Y, pt.Y);
1311                                 int bottom = Math.Max (box_select_start.Y, pt.Y);
1312                                 return Rectangle.FromLTRB (left, top, right, bottom);
1313                         }
1314
1315                         ArrayList BoxSelectedItems {
1316                                 get {
1317                                         ArrayList result = new ArrayList ();
1318                                         foreach (ListViewItem item in owner.Items) {
1319                                                 Rectangle r = item.Bounds;
1320                                                 r.X += r.Width / 4;
1321                                                 r.Y += r.Height / 4;
1322                                                 r.Width /= 2;
1323                                                 r.Height /= 2;
1324                                                 if (BoxSelectRectangle.IntersectsWith (r))
1325                                                         result.Add (item);
1326                                         }
1327                                         return result;
1328                                 }
1329                         }
1330
1331                         private bool PerformBoxSelection (Point pt)
1332                         {
1333                                 if (box_select_mode == BoxSelect.None)
1334                                         return false;
1335
1336                                 BoxSelectRectangle = CalculateBoxSelectRectangle (pt);
1337
1338                                 ArrayList box_items = BoxSelectedItems;
1339
1340                                 ArrayList items;
1341
1342                                 switch (box_select_mode) {
1343
1344                                 case BoxSelect.Normal:
1345                                         items = box_items;
1346                                         break;
1347
1348                                 case BoxSelect.Control:
1349                                         items = new ArrayList ();
1350                                         foreach (ListViewItem item in prev_selection)
1351                                                 if (!box_items.Contains (item))
1352                                                         items.Add (item);
1353                                         foreach (ListViewItem item in box_items)
1354                                                 if (!prev_selection.Contains (item))
1355                                                         items.Add (item);
1356                                         break;
1357
1358                                 case BoxSelect.Shift:
1359                                         items = box_items;
1360                                         foreach (ListViewItem item in box_items)
1361                                                 prev_selection.Remove (item);
1362                                         foreach (ListViewItem item in prev_selection)
1363                                                 items.Add (item);
1364                                         break;
1365
1366                                 default:
1367                                         throw new Exception ("Unexpected Selection mode: " + box_select_mode);
1368                                 }
1369
1370                                 SuspendLayout ();
1371                                 owner.SelectItems (items);
1372                                 ResumeLayout ();
1373
1374                                 return true;
1375                         }
1376
1377                         private void ItemsMouseDown (object sender, MouseEventArgs me)
1378                         {
1379                                 if (owner.items.Count == 0)
1380                                         return;
1381
1382                                 Point pt = new Point (me.X, me.Y);
1383                                 foreach (ListViewItem item in owner.items) {
1384                                         if (item.CheckRectReal.Contains (pt)) {
1385                                                 CheckState curr_state = item.Checked ?  CheckState.Checked : CheckState.Unchecked;
1386                                                 item.Checked = !item.Checked;
1387
1388                                                 CheckState new_state = item.Checked ?  CheckState.Checked : CheckState.Unchecked;
1389
1390                                                 // Raise the ItemCheck event
1391                                                 ItemCheckEventArgs ice = new ItemCheckEventArgs (item.Index, curr_state, new_state);
1392                                                 owner.OnItemCheck (ice);
1393                                                 break;
1394                                         }
1395
1396                                         if (owner.View == View.Details && !owner.FullRowSelect) {
1397                                                 if (item.GetBounds (ItemBoundsPortion.Label).Contains (pt)) {
1398                                                         clicked_item = item;
1399                                                         break;
1400                                                 }
1401                                         } else {
1402                                                 if (item.Bounds.Contains (pt)) {
1403                                                         clicked_item = item;
1404                                                         break;
1405                                                 }
1406                                         }
1407                                 }
1408
1409
1410                                 if (clicked_item != null) {
1411                                         owner.SetFocusedItem (clicked_item);
1412                                         bool changed = !clicked_item.Selected;
1413                                         if (owner.MultiSelect && (XplatUI.State.ModifierKeys & Keys.Control) == 0)
1414                                                 owner.UpdateMultiSelection (clicked_item.Index);
1415                                         else
1416                                                 clicked_item.Selected = true;
1417
1418                                         if (changed)
1419                                                 owner.OnSelectedIndexChanged (EventArgs.Empty);
1420
1421                                         // Raise double click if the item was clicked. On MS the
1422                                         // double click is only raised if you double click an item
1423                                         if (me.Clicks > 1 && clicked_item != null)
1424                                                 owner.OnDoubleClick (EventArgs.Empty);
1425                                         else if (me.Clicks == 1 && clicked_item != null)
1426                                                 owner.OnClick (EventArgs.Empty);
1427                                 } else {
1428                                         if (owner.FocusedItem == null)
1429                                                 owner.SetFocusedItem (owner.Items [0]);
1430                                         if (owner.MultiSelect) {
1431                                                 Keys mods = XplatUI.State.ModifierKeys;
1432                                                 if ((mods & Keys.Shift) != 0)
1433                                                         box_select_mode = BoxSelect.Shift;
1434                                                 else if ((mods & Keys.Control) != 0)
1435                                                         box_select_mode = BoxSelect.Control;
1436                                                 else
1437                                                         box_select_mode = BoxSelect.Normal;
1438                                                 box_select_start = pt;
1439                                                 prev_selection = (ArrayList) owner.SelectedItems.list.Clone ();
1440                                         } else if (owner.selected_indices.Count > 0) {
1441                                                 owner.SelectedItems.Clear ();
1442                                                 owner.SelectedIndices.list.Clear ();
1443                                                 owner.OnSelectedIndexChanged (EventArgs.Empty);
1444                                         }
1445                                 }
1446                         }
1447
1448                         private void ItemsMouseMove (object sender, MouseEventArgs me)
1449                         {
1450                                 if (PerformBoxSelection (new Point (me.X, me.Y)))
1451                                         return;
1452
1453                                 if (owner.HoverSelection && hover_processed) {
1454
1455                                         Point pt = PointToClient (Control.MousePosition);
1456                                         ListViewItem item = owner.GetItemAt (pt.X, pt.Y);
1457                                         if (item == null || item.Selected)
1458                                                 return;
1459
1460                                         hover_processed = false;
1461                                         XplatUI.ResetMouseHover (Handle);
1462                                 }
1463                         }
1464
1465
1466                         private void ItemsMouseHover (object sender, EventArgs e)
1467                         {
1468                                 if (Capture || !owner.HoverSelection)
1469                                         return;
1470
1471                                 hover_processed = true;
1472                                 Point pt = PointToClient (Control.MousePosition);
1473                                 ListViewItem item = owner.GetItemAt (pt.X, pt.Y);
1474
1475                                 if (item == null)
1476                                         return;
1477
1478                                 item.Selected = true;
1479                                 owner.OnSelectedIndexChanged (new EventArgs ());
1480                         }
1481
1482                         private void ItemsMouseUp (object sender, MouseEventArgs me)
1483                         {
1484                                 Capture = false;
1485                                 if (owner.Items.Count == 0)
1486                                         return;
1487
1488                                 Point pt = new Point (me.X, me.Y);
1489
1490                                 Rectangle rect = Rectangle.Empty;
1491                                 if (clicked_item != null) {
1492                                         if (owner.view == View.Details && !owner.full_row_select)
1493                                                 rect = clicked_item.GetBounds (ItemBoundsPortion.Label);
1494                                         else
1495                                                 rect = clicked_item.Bounds;
1496
1497                                         if (rect.Contains (pt)) {
1498                                                 switch (owner.activation) {
1499                                                 case ItemActivation.OneClick:
1500                                                         owner.OnItemActivate (EventArgs.Empty);
1501                                                         break;
1502
1503                                                 case ItemActivation.TwoClick:
1504                                                         if (last_clicked_item == clicked_item) {
1505                                                                 owner.OnItemActivate (EventArgs.Empty);
1506                                                                 last_clicked_item = null;
1507                                                         } else
1508                                                                 last_clicked_item = clicked_item;
1509                                                         break;
1510                                                 default:
1511                                                         // DoubleClick activation is handled in another handler
1512                                                         break;
1513                                                 }
1514                                         }
1515                                 } else if (owner.SelectedItems.Count > 0 && BoxSelectRectangle.Size.IsEmpty) {
1516                                         // Need this to clean up background clicks
1517                                         owner.SelectedItems.Clear ();
1518                                         owner.SelectedIndices.list.Clear ();
1519                                         owner.OnSelectedIndexChanged (EventArgs.Empty);
1520                                 }
1521
1522                                 clicked_item = null;
1523                                 box_select_start = Point.Empty;
1524                                 BoxSelectRectangle = Rectangle.Empty;
1525                                 prev_selection = null;
1526                                 box_select_mode = BoxSelect.None;
1527                         }
1528
1529                         private void ItemsMouseWheel (object sender, MouseEventArgs me)
1530                         {
1531                                 if (owner.Items.Count == 0)
1532                                         return;
1533
1534                                 int lines = me.Delta / 120;
1535
1536                                 if (lines == 0)
1537                                         return;
1538
1539                                 switch (owner.View) {
1540                                 case View.Details:
1541                                 case View.SmallIcon:
1542                                         owner.Scroll (owner.v_scroll, -owner.Items [0].Bounds.Height * SystemInformation.MouseWheelScrollLines * lines);
1543                                         break;
1544                                 case View.LargeIcon:
1545                                         owner.Scroll (owner.v_scroll, -(owner.Items [0].Bounds.Height + ThemeEngine.Current.ListViewVerticalSpacing)  * lines);
1546                                         break;
1547                                 case View.List:
1548                                         owner.Scroll (owner.h_scroll, -owner.Items [0].Bounds.Width * lines);
1549                                         break;
1550                                 }
1551                         }
1552
1553                         internal override void OnPaintInternal (PaintEventArgs pe)
1554                         {
1555                                 ThemeEngine.Current.DrawListViewItems (pe.Graphics, pe.ClipRectangle, owner);
1556                         }
1557                 }
1558
1559                 internal override void OnPaintInternal (PaintEventArgs pe)
1560                 {
1561                         if (updating)
1562                                 return;
1563
1564                         CalculateScrollBars ();
1565                 }
1566
1567                 private void ListView_SizeChanged (object sender, EventArgs e)
1568                 {
1569                         CalculateListView (alignment);
1570                 }
1571
1572                 private void SetFocusedItem (ListViewItem item)
1573                 {
1574                         if (focused_item != null)
1575                                 focused_item.Focused = false;
1576
1577                         if (item != null)
1578                                 item.Focused = true;
1579
1580                         focused_item = item;
1581                 }
1582
1583                 private void HorizontalScroller (object sender, EventArgs e)
1584                 {
1585                         // Avoid unnecessary flickering, when button is
1586                         // kept pressed at the end
1587                         if (h_marker != h_scroll.Value) {
1588
1589                                 int pixels =  h_marker - h_scroll.Value;
1590
1591                                 h_marker = h_scroll.Value;
1592                                 if (header_control.Visible)
1593                                         XplatUI.ScrollWindow (header_control.Handle, pixels, 0, false);
1594
1595                                 XplatUI.ScrollWindow (item_control.Handle, pixels, 0, false);
1596                         }
1597                 }
1598
1599                 private void VerticalScroller (object sender, EventArgs e)
1600                 {
1601                         // Avoid unnecessary flickering, when button is
1602                         // kept pressed at the end
1603                         if (v_marker != v_scroll.Value) {
1604                                 int pixels =  v_marker - v_scroll.Value;
1605                                 Rectangle area = item_control.ClientRectangle;
1606                                 v_marker = v_scroll.Value;
1607                                 XplatUI.ScrollWindow (item_control.Handle, area, 0, pixels, false);
1608                         }
1609                 }
1610                 #endregion      // Internal Methods Properties
1611
1612                 #region Protected Methods
1613                 protected override void CreateHandle ()
1614                 {
1615                         base.CreateHandle ();
1616                 }
1617
1618                 protected override void Dispose (bool disposing)
1619                 {
1620                         if (disposing) {
1621                                 h_scroll.Dispose ();
1622                                 v_scroll.Dispose ();
1623
1624                                 large_image_list = null;
1625                                 small_image_list = null;
1626                                 state_image_list = null;
1627                         }
1628
1629                         base.Dispose (disposing);
1630                 }
1631
1632                 protected override bool IsInputKey (Keys keyData)
1633                 {
1634                         switch (keyData) {
1635                         case Keys.Up:
1636                         case Keys.Down:
1637                         case Keys.PageUp:
1638                         case Keys.PageDown:
1639                         case Keys.Right:
1640                         case Keys.Left:
1641                         case Keys.End:
1642                         case Keys.Home:
1643                                 return true;
1644
1645                         default:
1646                                 break;
1647                         }
1648
1649                         return base.IsInputKey (keyData);
1650                 }
1651
1652                 protected virtual void OnAfterLabelEdit (LabelEditEventArgs e)
1653                 {
1654                         if (AfterLabelEdit != null)
1655                                 AfterLabelEdit (this, e);
1656                 }
1657
1658                 protected virtual void OnBeforeLabelEdit (LabelEditEventArgs e)
1659                 {
1660                         if (BeforeLabelEdit != null)
1661                                 BeforeLabelEdit (this, e);
1662                 }
1663
1664                 protected virtual void OnColumnClick (ColumnClickEventArgs e)
1665                 {
1666                         if (ColumnClick != null)
1667                                 ColumnClick (this, e);
1668                 }
1669
1670                 protected override void OnEnabledChanged (EventArgs e)
1671                 {
1672                         base.OnEnabledChanged (e);
1673                 }
1674
1675                 protected override void OnFontChanged (EventArgs e)
1676                 {
1677                         base.OnFontChanged (e);
1678                         Redraw (true);
1679                 }
1680
1681                 protected override void OnHandleCreated (EventArgs e)
1682                 {
1683                         base.OnHandleCreated (e);
1684                 }
1685
1686                 protected override void OnHandleDestroyed (EventArgs e)
1687                 {
1688                         base.OnHandleDestroyed (e);
1689                 }
1690
1691                 protected virtual void OnItemActivate (EventArgs e)
1692                 {
1693                         if (ItemActivate != null)
1694                                 ItemActivate (this, e);
1695                 }
1696
1697                 protected virtual void OnItemCheck (ItemCheckEventArgs ice)
1698                 {
1699                         if (ItemCheck != null)
1700                                 ItemCheck (this, ice);
1701                 }
1702
1703                 protected virtual void OnItemDrag (ItemDragEventArgs e)
1704                 {
1705                         if (ItemDrag != null)
1706                                 ItemDrag (this, e);
1707                 }
1708
1709                 protected virtual void OnSelectedIndexChanged (EventArgs e)
1710                 {
1711                         if (SelectedIndexChanged != null)
1712                                 SelectedIndexChanged (this, e);
1713                 }
1714
1715                 protected override void OnSystemColorsChanged (EventArgs e)
1716                 {
1717                         base.OnSystemColorsChanged (e);
1718                 }
1719
1720                 protected void RealizeProperties ()
1721                 {
1722                         // FIXME: TODO
1723                 }
1724
1725                 protected void UpdateExtendedStyles ()
1726                 {
1727                         // FIXME: TODO
1728                 }
1729
1730                 protected override void WndProc (ref Message m)
1731                 {
1732                         base.WndProc (ref m);
1733                 }
1734                 #endregion // Protected Methods
1735
1736                 #region Public Instance Methods
1737                 public void ArrangeIcons ()
1738                 {
1739                         ArrangeIcons (this.alignment);
1740                 }
1741
1742                 public void ArrangeIcons (ListViewAlignment alignment)
1743                 {
1744                         // Icons are arranged only if view is set to LargeIcon or SmallIcon
1745                         if (view == View.LargeIcon || view == View.SmallIcon) {
1746                                 this.CalculateListView (alignment);
1747                                 // we have done the calculations already
1748                                 this.Redraw (false);
1749                         }
1750                 }
1751
1752                 public void BeginUpdate ()
1753                 {
1754                         // flag to avoid painting
1755                         updating = true;
1756                 }
1757
1758                 public void Clear ()
1759                 {
1760                         columns.Clear ();
1761                         items.Clear (); // Redraw (true) called here
1762                 }
1763
1764                 public void EndUpdate ()
1765                 {
1766                         // flag to avoid painting
1767                         updating = false;
1768
1769                         // probably, now we need a redraw with recalculations
1770                         this.Redraw (true);
1771                 }
1772
1773                 public void EnsureVisible (int index)
1774                 {
1775                         if (index < 0 || index >= items.Count || scrollable == false)
1776                                 return;
1777
1778                         Rectangle view_rect = item_control.ClientRectangle;
1779                         Rectangle bounds = items [index].Bounds;
1780
1781                         if (view_rect.Contains (bounds))
1782                                 return;
1783
1784                         if (bounds.Left < 0)
1785                                 h_scroll.Value += bounds.Left;
1786                         else if (bounds.Right > view_rect.Right)
1787                                 h_scroll.Value += (bounds.Right - view_rect.Right);
1788
1789                         if (bounds.Top < 0)
1790                                 v_scroll.Value += bounds.Top;
1791                         else if (bounds.Bottom > view_rect.Bottom)
1792                                 v_scroll.Value += (bounds.Bottom - view_rect.Bottom);
1793                 }
1794
1795                 public ListViewItem GetItemAt (int x, int y)
1796                 {
1797                         foreach (ListViewItem item in items) {
1798                                 if (item.Bounds.Contains (x, y))
1799                                         return item;
1800                         }
1801                         return null;
1802                 }
1803
1804                 public Rectangle GetItemRect (int index)
1805                 {
1806                         return GetItemRect (index, ItemBoundsPortion.Entire);
1807                 }
1808
1809                 public Rectangle GetItemRect (int index, ItemBoundsPortion portion)
1810                 {
1811                         if (index < 0 || index >= items.Count)
1812                                 throw new IndexOutOfRangeException ("Invalid Index");
1813
1814                         return items [index].GetBounds (portion);
1815                 }
1816
1817                 public void Sort ()
1818                 {
1819                         if (sort_order != SortOrder.None)
1820                                 items.list.Sort (item_sorter);
1821
1822                         if (sort_order == SortOrder.Descending)
1823                                 items.list.Reverse ();
1824
1825                         this.Redraw (true);
1826                 }
1827
1828                 public override string ToString ()
1829                 {
1830                         int count = this.Items.Count;
1831
1832                         if (count == 0)
1833                                 return string.Format ("System.Windows.Forms.ListView, Items.Count: 0");
1834                         else
1835                                 return string.Format ("System.Windows.Forms.ListView, Items.Count: {0}, Items[0]: {1}", count, this.Items [0].ToString ());
1836                 }
1837                 #endregion      // Public Instance Methods
1838
1839
1840                 #region Subclasses
1841
1842                 class HeaderControl : Control {
1843
1844                         ListView owner;
1845                         bool column_resize_active = false;
1846                         ColumnHeader resize_column;
1847                         ColumnHeader clicked_column;
1848                         ColumnHeader drag_column;
1849                         int drag_x;
1850                         int drag_to_index = -1;
1851
1852                         public HeaderControl (ListView owner)
1853                         {
1854                                 this.owner = owner;
1855                                 MouseDown += new MouseEventHandler (HeaderMouseDown);
1856                                 MouseMove += new MouseEventHandler (HeaderMouseMove);
1857                                 MouseUp += new MouseEventHandler (HeaderMouseUp);
1858                         }
1859
1860                         private ColumnHeader ColumnAtX (int x)
1861                         {
1862                                 Point pt = new Point (x, 0);
1863                                 ColumnHeader result = null;
1864                                 foreach (ColumnHeader col in owner.Columns) {
1865                                         if (col.Rect.Contains (pt)) {
1866                                                 result = col;
1867                                                 break;
1868                                         }
1869                                 }
1870                                 return result;
1871                         }
1872
1873                         private int GetReorderedIndex (ColumnHeader col)
1874                         {
1875                                 if (owner.reordered_column_indices == null)
1876                                         return col.Index;
1877                                 else
1878                                         for (int i = 0; i < owner.Columns.Count; i++)
1879                                                 if (owner.reordered_column_indices [i] == col.Index)
1880                                                         return i;
1881                                 throw new Exception ("Column index missing from reordered array");
1882                         }
1883
1884                         private void HeaderMouseDown (object sender, MouseEventArgs me)
1885                         {
1886                                 if (resize_column != null) {
1887                                         column_resize_active = true;
1888                                         Capture = true;
1889                                         return;
1890                                 }
1891
1892                                 clicked_column = ColumnAtX (me.X + owner.h_marker);
1893
1894                                 if (clicked_column != null) {
1895                                         Capture = true;
1896                                         if (owner.AllowColumnReorder) {
1897                                                 drag_x = me.X;
1898                                                 drag_column = (ColumnHeader) (clicked_column as ICloneable).Clone ();
1899                                                 drag_column.column_rect = clicked_column.Rect;
1900                                                 drag_to_index = GetReorderedIndex (clicked_column);
1901                                         }
1902                                         clicked_column.pressed = true;
1903                                         Rectangle bounds = clicked_column.Rect;
1904                                         bounds.X -= owner.h_marker;
1905                                         Invalidate (bounds);
1906                                         return;
1907                                 }
1908                         }
1909
1910                         private void HeaderMouseMove (object sender, MouseEventArgs me)
1911                         {
1912                                 Point pt = new Point (me.X + owner.h_marker, me.Y);
1913
1914                                 if (column_resize_active)  {
1915                                         resize_column.Width = pt.X - resize_column.X;
1916                                         if (resize_column.Width < 0)
1917                                                 resize_column.Width = 0;
1918                                         return;
1919                                 }
1920
1921                                 resize_column = null;
1922
1923                                 if (clicked_column != null) {
1924                                         if (owner.AllowColumnReorder) {
1925                                                 Rectangle r;
1926
1927                                                 r = drag_column.column_rect;
1928                                                 r.X = clicked_column.Rect.X + me.X - drag_x;
1929                                                 drag_column.column_rect = r;
1930
1931                                                 int x = me.X + owner.h_marker;
1932                                                 ColumnHeader over = ColumnAtX (x);
1933                                                 if (over == null)
1934                                                         drag_to_index = owner.Columns.Count;
1935                                                 else if (x < over.X + over.Width / 2)
1936                                                         drag_to_index = GetReorderedIndex (over);
1937                                                 else
1938                                                         drag_to_index = GetReorderedIndex (over) + 1;
1939                                                 Invalidate ();
1940                                         } else {
1941                                                 ColumnHeader over = ColumnAtX (me.X + owner.h_marker);
1942                                                 bool pressed = clicked_column.pressed;
1943                                                 clicked_column.pressed = over == clicked_column;
1944                                                 if (clicked_column.pressed ^ pressed) {
1945                                                         Rectangle bounds = clicked_column.Rect;
1946                                                         bounds.X -= owner.h_marker;
1947                                                         Invalidate (bounds);
1948                                                 }
1949                                         }
1950                                         return;
1951                                 }
1952
1953                                 for (int i = 0; i < owner.Columns.Count; i++) {
1954                                         Rectangle zone = owner.Columns [i].Rect;
1955                                         zone.X = zone.Right - 5;
1956                                         zone.Width = 10;
1957                                         if (zone.Contains (pt)) {
1958                                                 resize_column = owner.Columns [i];
1959                                                 break;
1960                                         }
1961                                 }
1962
1963                                 if (resize_column == null)
1964                                         Cursor = Cursors.Default;
1965                                 else
1966                                         Cursor = Cursors.VSplit;
1967                         }
1968
1969                         void HeaderMouseUp (object sender, MouseEventArgs me)
1970                         {
1971                                 Capture = false;
1972
1973                                 if (column_resize_active) {
1974                                         column_resize_active = false;
1975                                         resize_column = null;
1976                                         Cursor = Cursors.Default;
1977                                         return;
1978                                 }
1979
1980                                 if (clicked_column != null && clicked_column.pressed) {
1981                                         clicked_column.pressed = false;
1982                                         Rectangle bounds = clicked_column.Rect;
1983                                         bounds.X -= owner.h_marker;
1984                                         Invalidate (bounds);
1985                                         owner.OnColumnClick (new ColumnClickEventArgs (clicked_column.Index));
1986                                 }
1987
1988                                 if (drag_column != null && owner.AllowColumnReorder) {
1989                                         drag_column = null;
1990                                         if (drag_to_index > GetReorderedIndex (clicked_column))
1991                                                 drag_to_index--;
1992                                         if (owner.GetReorderedColumn (drag_to_index) != clicked_column)
1993                                                 owner.ReorderColumn (clicked_column, drag_to_index);
1994                                         drag_to_index = -1;
1995                                         Invalidate ();
1996                                 }
1997
1998                                 clicked_column = null;
1999                         }
2000
2001                         internal override void OnPaintInternal (PaintEventArgs pe)
2002                         {
2003                                 if (owner.updating)
2004                                         return;
2005
2006                                 Theme theme = ThemeEngine.Current;
2007                                 theme.DrawListViewHeader (pe.Graphics, pe.ClipRectangle, this.owner);
2008
2009                                 if (drag_column == null)
2010                                         return;
2011
2012                                 int target_x;
2013                                 if (drag_to_index == owner.Columns.Count)
2014                                         target_x = owner.GetReorderedColumn (drag_to_index - 1).Rect.Right - owner.h_marker;
2015                                 else
2016                                         target_x = owner.GetReorderedColumn (drag_to_index).Rect.X - owner.h_marker;
2017                                 theme.DrawListViewHeaderDragDetails (pe.Graphics, owner, drag_column, target_x);
2018                         }
2019                 }
2020
2021                 public class CheckedIndexCollection : IList, ICollection, IEnumerable
2022                 {
2023                         internal ArrayList list;
2024                         private ListView owner;
2025
2026                         #region Public Constructor
2027                         public CheckedIndexCollection (ListView owner)
2028                         {
2029                                 list = new ArrayList ();
2030                                 this.owner = owner;
2031                         }
2032                         #endregion      // Public Constructor
2033
2034                         #region Public Properties
2035                         [Browsable (false)]
2036                         public int Count {
2037                                 get { return list.Count; }
2038                         }
2039
2040                         public bool IsReadOnly {
2041                                 get { return true; }
2042                         }
2043
2044                         public int this [int index] {
2045                                 get {
2046                                         if (index < 0 || index >= list.Count)
2047                                                 throw new ArgumentOutOfRangeException ("Index out of range.");
2048                                         return (int) list [index];
2049                                 }
2050                         }
2051
2052                         bool ICollection.IsSynchronized {
2053                                 get { return false; }
2054                         }
2055
2056                         object ICollection.SyncRoot {
2057                                 get { return this; }
2058                         }
2059
2060                         bool IList.IsFixedSize {
2061                                 get { return true; }
2062                         }
2063
2064                         object IList.this [int index] {
2065                                 get { return this [index]; }
2066                                 set { throw new NotSupportedException ("SetItem operation is not supported."); }
2067                         }
2068                         #endregion      // Public Properties
2069
2070                         #region Public Methods
2071                         public bool Contains (int checkedIndex)
2072                         {
2073                                 return list.Contains (checkedIndex);
2074                         }
2075
2076                         public IEnumerator GetEnumerator ()
2077                         {
2078                                 return list.GetEnumerator ();
2079                         }
2080
2081                         void ICollection.CopyTo (Array dest, int index)
2082                         {
2083                                 list.CopyTo (dest, index);
2084                         }
2085
2086                         int IList.Add (object value)
2087                         {
2088                                 throw new NotSupportedException ("Add operation is not supported.");
2089                         }
2090
2091                         void IList.Clear ()
2092                         {
2093                                 throw new NotSupportedException ("Clear operation is not supported.");
2094                         }
2095
2096                         bool IList.Contains (object checkedIndex)
2097                         {
2098                                 return list.Contains (checkedIndex);
2099                         }
2100
2101                         int IList.IndexOf (object checkedIndex)
2102                         {
2103                                 return list.IndexOf (checkedIndex);
2104                         }
2105
2106                         void IList.Insert (int index, object value)
2107                         {
2108                                 throw new NotSupportedException ("Insert operation is not supported.");
2109                         }
2110
2111                         void IList.Remove (object value)
2112                         {
2113                                 throw new NotSupportedException ("Remove operation is not supported.");
2114                         }
2115
2116                         void IList.RemoveAt (int index)
2117                         {
2118                                 throw new NotSupportedException ("RemoveAt operation is not supported.");
2119                         }
2120
2121                         public int IndexOf (int checkedIndex)
2122                         {
2123                                 return list.IndexOf (checkedIndex);
2124                         }
2125                         #endregion      // Public Methods
2126
2127                 }       // CheckedIndexCollection
2128
2129                 public class CheckedListViewItemCollection : IList, ICollection, IEnumerable
2130                 {
2131                         internal ArrayList list;
2132                         private ListView owner;
2133
2134                         #region Public Constructor
2135                         public CheckedListViewItemCollection (ListView owner)
2136                         {
2137                                 list = new ArrayList ();
2138                                 this.owner = owner;
2139                         }
2140                         #endregion      // Public Constructor
2141
2142                         #region Public Properties
2143                         [Browsable (false)]
2144                         public int Count {
2145                                 get { return list.Count; }
2146                         }
2147
2148                         public bool IsReadOnly {
2149                                 get { return true; }
2150                         }
2151
2152                         public ListViewItem this [int index] {
2153                                 get {
2154                                         if (index < 0 || index >= list.Count)
2155                                                 throw new ArgumentOutOfRangeException ("Index out of range.");
2156                                         return (ListViewItem) list [index];
2157                                 }
2158                         }
2159
2160                         bool ICollection.IsSynchronized {
2161                                 get { return list.IsSynchronized; }
2162                         }
2163
2164                         object ICollection.SyncRoot {
2165                                 get { return this; }
2166                         }
2167
2168                         bool IList.IsFixedSize {
2169                                 get { return true; }
2170                         }
2171
2172                         object IList.this [int index] {
2173                                 get { return this [index]; }
2174                                 set { throw new NotSupportedException ("SetItem operation is not supported."); }
2175                         }
2176                         #endregion      // Public Properties
2177
2178                         #region Public Methods
2179                         public bool Contains (ListViewItem item)
2180                         {
2181                                 return list.Contains (item);
2182                         }
2183
2184                         public void CopyTo (Array dest, int index)
2185                         {
2186                                 list.CopyTo (dest, index);
2187                         }
2188
2189                         public IEnumerator GetEnumerator ()
2190                         {
2191                                 return list.GetEnumerator ();
2192                         }
2193
2194                         int IList.Add (object value)
2195                         {
2196                                 throw new NotSupportedException ("Add operation is not supported.");
2197                         }
2198
2199                         void IList.Clear ()
2200                         {
2201                                 throw new NotSupportedException ("Clear operation is not supported.");
2202                         }
2203
2204                         bool IList.Contains (object item)
2205                         {
2206                                 return list.Contains (item);
2207                         }
2208
2209                         int IList.IndexOf (object item)
2210                         {
2211                                 return list.IndexOf (item);
2212                         }
2213
2214                         void IList.Insert (int index, object value)
2215                         {
2216                                 throw new NotSupportedException ("Insert operation is not supported.");
2217                         }
2218
2219                         void IList.Remove (object value)
2220                         {
2221                                 throw new NotSupportedException ("Remove operation is not supported.");
2222                         }
2223
2224                         void IList.RemoveAt (int index)
2225                         {
2226                                 throw new NotSupportedException ("RemoveAt operation is not supported.");
2227                         }
2228
2229                         public int IndexOf (ListViewItem item)
2230                         {
2231                                 return list.IndexOf (item);
2232                         }
2233                         #endregion      // Public Methods
2234
2235                 }       // CheckedListViewItemCollection
2236
2237                 public class ColumnHeaderCollection : IList, ICollection, IEnumerable
2238                 {
2239                         internal ArrayList list;
2240                         private ListView owner;
2241
2242                         #region Public Constructor
2243                         public ColumnHeaderCollection (ListView owner)
2244                         {
2245                                 list = new ArrayList ();
2246                                 this.owner = owner;
2247                         }
2248                         #endregion      // Public Constructor
2249
2250                         #region Public Properties
2251                         [Browsable (false)]
2252                         public int Count {
2253                                 get { return list.Count; }
2254                         }
2255
2256                         public bool IsReadOnly {
2257                                 get { return false; }
2258                         }
2259
2260                         public virtual ColumnHeader this [int index] {
2261                                 get {
2262                                         if (index < 0 || index >= list.Count)
2263                                                 throw new ArgumentOutOfRangeException ("Index out of range.");
2264                                         return (ColumnHeader) list [index];
2265                                 }
2266                         }
2267
2268                         bool ICollection.IsSynchronized {
2269                                 get { return true; }
2270                         }
2271
2272                         object ICollection.SyncRoot {
2273                                 get { return this; }
2274                         }
2275
2276                         bool IList.IsFixedSize {
2277                                 get { return list.IsFixedSize; }
2278                         }
2279
2280                         object IList.this [int index] {
2281                                 get { return this [index]; }
2282                                 set { throw new NotSupportedException ("SetItem operation is not supported."); }
2283                         }
2284                         #endregion      // Public Properties
2285
2286                         #region Public Methods
2287                         public virtual int Add (ColumnHeader value)
2288                         {
2289                                 int idx;
2290                                 value.owner = this.owner;
2291                                 idx = list.Add (value);
2292                                 if (owner.IsHandleCreated) {
2293                                         owner.Redraw (true);
2294                                 }
2295                                 return idx;
2296                         }
2297
2298                         public virtual ColumnHeader Add (string str, int width, HorizontalAlignment textAlign)
2299                         {
2300                                 ColumnHeader colHeader = new ColumnHeader (this.owner, str, textAlign, width);
2301                                 this.Add (colHeader);
2302                                 return colHeader;
2303                         }
2304
2305                         public virtual void AddRange (ColumnHeader [] values)
2306                         {
2307                                 foreach (ColumnHeader colHeader in values) {
2308                                         colHeader.owner = this.owner;
2309                                         Add (colHeader);
2310                                 }
2311
2312                                 owner.Redraw (true);
2313                         }
2314
2315                         public virtual void Clear ()
2316                         {
2317                                 list.Clear ();
2318                                 owner.Redraw (true);
2319                         }
2320
2321                         public bool Contains (ColumnHeader value)
2322                         {
2323                                 return list.Contains (value);
2324                         }
2325
2326                         public IEnumerator GetEnumerator ()
2327                         {
2328                                 return list.GetEnumerator ();
2329                         }
2330
2331                         void ICollection.CopyTo (Array dest, int index)
2332                         {
2333                                 list.CopyTo (dest, index);
2334                         }
2335
2336                         int IList.Add (object value)
2337                         {
2338                                 if (! (value is ColumnHeader)) {
2339                                         throw new ArgumentException ("Not of type ColumnHeader", "value");
2340                                 }
2341
2342                                 return this.Add ((ColumnHeader) value);
2343                         }
2344
2345                         bool IList.Contains (object value)
2346                         {
2347                                 if (! (value is ColumnHeader)) {
2348                                         throw new ArgumentException ("Not of type ColumnHeader", "value");
2349                                 }
2350
2351                                 return this.Contains ((ColumnHeader) value);
2352                         }
2353
2354                         int IList.IndexOf (object value)
2355                         {
2356                                 if (! (value is ColumnHeader)) {
2357                                         throw new ArgumentException ("Not of type ColumnHeader", "value");
2358                                 }
2359
2360                                 return this.IndexOf ((ColumnHeader) value);
2361                         }
2362
2363                         void IList.Insert (int index, object value)
2364                         {
2365                                 if (! (value is ColumnHeader)) {
2366                                         throw new ArgumentException ("Not of type ColumnHeader", "value");
2367                                 }
2368
2369                                 this.Insert (index, (ColumnHeader) value);
2370                         }
2371
2372                         void IList.Remove (object value)
2373                         {
2374                                 if (! (value is ColumnHeader)) {
2375                                         throw new ArgumentException ("Not of type ColumnHeader", "value");
2376                                 }
2377
2378                                 this.Remove ((ColumnHeader) value);
2379                         }
2380
2381                         public int IndexOf (ColumnHeader value)
2382                         {
2383                                 return list.IndexOf (value);
2384                         }
2385
2386                         public void Insert (int index, ColumnHeader value)
2387                         {
2388                                 // LAMESPEC: MSDOCS say greater than or equal to the value of the Count property
2389                                 // but it's really only greater.
2390                                 if (index < 0 || index > list.Count)
2391                                         throw new ArgumentOutOfRangeException ("Index out of range.");
2392
2393                                 value.owner = this.owner;
2394                                 list.Insert (index, value);
2395                                 owner.Redraw (true);
2396                         }
2397
2398                         public void Insert (int index, string str, int width, HorizontalAlignment textAlign)
2399                         {
2400                                 ColumnHeader colHeader = new ColumnHeader (this.owner, str, textAlign, width);
2401                                 this.Insert (index, colHeader);
2402                         }
2403
2404                         public virtual void Remove (ColumnHeader column)
2405                         {
2406                                 // TODO: Update Column internal index ?
2407                                 list.Remove (column);
2408                                 owner.Redraw (true);
2409                         }
2410
2411                         public virtual void RemoveAt (int index)
2412                         {
2413                                 if (index < 0 || index >= list.Count)
2414                                         throw new ArgumentOutOfRangeException ("Index out of range.");
2415
2416                                 // TODO: Update Column internal index ?
2417                                 list.RemoveAt (index);
2418                                 owner.Redraw (true);
2419                         }
2420                         #endregion      // Public Methods
2421
2422
2423                 }       // ColumnHeaderCollection
2424
2425                 public class ListViewItemCollection : IList, ICollection, IEnumerable
2426                 {
2427                         internal ArrayList list;
2428                         private ListView owner;
2429
2430                         #region Public Constructor
2431                         public ListViewItemCollection (ListView owner)
2432                         {
2433                                 list = new ArrayList ();
2434                                 this.owner = owner;
2435                         }
2436                         #endregion      // Public Constructor
2437
2438                         #region Public Properties
2439                         [Browsable (false)]
2440                         public int Count {
2441                                 get { return list.Count; }
2442                         }
2443
2444                         public bool IsReadOnly {
2445                                 get { return false; }
2446                         }
2447
2448                         public virtual ListViewItem this [int displayIndex] {
2449                                 get {
2450                                         if (displayIndex < 0 || displayIndex >= list.Count)
2451                                                 throw new ArgumentOutOfRangeException ("Index out of range.");
2452                                         return (ListViewItem) list [displayIndex];
2453                                 }
2454
2455                                 set {
2456                                         if (displayIndex < 0 || displayIndex >= list.Count)
2457                                                 throw new ArgumentOutOfRangeException ("Index out of range.");
2458
2459                                         if (list.Contains (value))
2460                                                 throw new ArgumentException ("An item cannot be added more than once. To add an item again, you need to clone it.", "value");
2461
2462                                         value.Owner = owner;
2463                                         list [displayIndex] = value;
2464
2465                                         owner.Redraw (true);
2466                                 }
2467                         }
2468
2469                         bool ICollection.IsSynchronized {
2470                                 get { return true; }
2471                         }
2472
2473                         object ICollection.SyncRoot {
2474                                 get { return this; }
2475                         }
2476
2477                         bool IList.IsFixedSize {
2478                                 get { return list.IsFixedSize; }
2479                         }
2480
2481                         object IList.this [int index] {
2482                                 get { return this [index]; }
2483                                 set {
2484                                         if (value is ListViewItem)
2485                                                 this [index] = (ListViewItem) value;
2486                                         else
2487                                                 this [index] = new ListViewItem (value.ToString ());
2488                                 }
2489                         }
2490                         #endregion      // Public Properties
2491
2492                         #region Public Methods
2493                         public virtual ListViewItem Add (ListViewItem value)
2494                         {
2495                                 if (list.Contains (value))
2496                                         throw new ArgumentException ("An item cannot be added more than once. To add an item again, you need to clone it.", "value");
2497
2498                                 value.Owner = owner;
2499                                 list.Add (value);
2500
2501                                 if (owner.Sorting != SortOrder.None)
2502                                         owner.Sort ();
2503
2504                                 owner.Redraw (true);
2505
2506                                 return value;
2507                         }
2508
2509                         public virtual ListViewItem Add (string text)
2510                         {
2511                                 ListViewItem item = new ListViewItem (text);
2512                                 return this.Add (item);
2513                         }
2514
2515                         public virtual ListViewItem Add (string text, int imageIndex)
2516                         {
2517                                 ListViewItem item = new ListViewItem (text, imageIndex);
2518                                 return this.Add (item);
2519                         }
2520
2521                         public void AddRange (ListViewItem [] values)
2522                         {
2523                                 list.Clear ();
2524                                 owner.SelectedItems.list.Clear ();
2525                                 owner.SelectedIndices.list.Clear ();
2526                                 owner.CheckedItems.list.Clear ();
2527                                 owner.CheckedIndices.list.Clear ();
2528
2529                                 foreach (ListViewItem item in values) {
2530                                         item.Owner = owner;
2531                                         list.Add (item);
2532                                 }
2533
2534                                 if (owner.Sorting != SortOrder.None)
2535                                         owner.Sort ();
2536
2537                                 owner.Redraw (true);
2538                         }
2539
2540                         public virtual void Clear ()
2541                         {
2542                                 owner.SetFocusedItem (null);
2543                                 owner.h_scroll.Value = owner.v_scroll.Value = 0;
2544                                 list.Clear ();
2545                                 owner.SelectedItems.list.Clear ();
2546                                 owner.SelectedIndices.list.Clear ();
2547                                 owner.CheckedItems.list.Clear ();
2548                                 owner.CheckedIndices.list.Clear ();
2549                                 owner.Redraw (true);
2550                         }
2551
2552                         public bool Contains (ListViewItem item)
2553                         {
2554                                 return list.Contains (item);
2555                         }
2556
2557                         public void CopyTo (Array dest, int index)
2558                         {
2559                                 list.CopyTo (dest, index);
2560                         }
2561
2562                         public IEnumerator GetEnumerator ()
2563                         {
2564                                 return list.GetEnumerator ();
2565                         }
2566
2567                         int IList.Add (object item)
2568                         {
2569                                 int result;
2570                                 ListViewItem li;
2571
2572                                 if (item is ListViewItem) {
2573                                         li = (ListViewItem) item;
2574                                         if (list.Contains (li))
2575                                                 throw new ArgumentException ("An item cannot be added more than once. To add an item again, you need to clone it.", "item");
2576                                 }
2577                                 else
2578                                         li = new ListViewItem (item.ToString ());
2579
2580                                 li.Owner = owner;
2581                                 result = list.Add (li);
2582                                 owner.Redraw (true);
2583
2584                                 return result;
2585                         }
2586
2587                         bool IList.Contains (object item)
2588                         {
2589                                 return list.Contains (item);
2590                         }
2591
2592                         int IList.IndexOf (object item)
2593                         {
2594                                 return list.IndexOf (item);
2595                         }
2596
2597                         void IList.Insert (int index, object item)
2598                         {
2599                                 if (item is ListViewItem)
2600                                         this.Insert (index, (ListViewItem) item);
2601                                 else
2602                                         this.Insert (index, item.ToString ());
2603                         }
2604
2605                         void IList.Remove (object item)
2606                         {
2607                                 Remove ((ListViewItem) item);
2608                         }
2609
2610                         public int IndexOf (ListViewItem item)
2611                         {
2612                                 return list.IndexOf (item);
2613                         }
2614
2615                         public ListViewItem Insert (int index, ListViewItem item)
2616                         {
2617                                 // LAMESPEC: MSDOCS say greater than or equal to the value of the Count property
2618                                 // but it's really only greater.
2619                                 if (index < 0 || index > list.Count)
2620                                         throw new ArgumentOutOfRangeException ("Index out of range.");
2621
2622                                 if (list.Contains (item))
2623                                         throw new ArgumentException ("An item cannot be added more than once. To add an item again, you need to clone it.", "item");
2624
2625                                 item.Owner = owner;
2626                                 list.Insert (index, item);
2627                                 owner.Redraw (true);
2628                                 return item;
2629                         }
2630
2631                         public ListViewItem Insert (int index, string text)
2632                         {
2633                                 return this.Insert (index, new ListViewItem (text));
2634                         }
2635
2636                         public ListViewItem Insert (int index, string text, int imageIndex)
2637                         {
2638                                 return this.Insert (index, new ListViewItem (text, imageIndex));
2639                         }
2640
2641                         public virtual void Remove (ListViewItem item)
2642                         {
2643                                 if (!list.Contains (item))
2644                                         return;
2645
2646                                 owner.SelectedItems.list.Remove (item);
2647                                 owner.SelectedIndices.list.Remove (item.Index);
2648                                 owner.CheckedItems.list.Remove (item);
2649                                 owner.CheckedIndices.list.Remove (item.Index);
2650                                 list.Remove (item);
2651                                 owner.Redraw (true);
2652                         }
2653
2654                         public virtual void RemoveAt (int index)
2655                         {
2656                                 if (index < 0 || index >= list.Count)
2657                                         throw new ArgumentOutOfRangeException ("Index out of range.");
2658
2659                                 list.RemoveAt (index);
2660                                 owner.SelectedItems.list.RemoveAt (index);
2661                                 owner.SelectedIndices.list.RemoveAt (index);
2662                                 owner.CheckedItems.list.RemoveAt (index);
2663                                 owner.CheckedIndices.list.RemoveAt (index);
2664                                 owner.Redraw (false);
2665                         }
2666                         #endregion      // Public Methods
2667
2668                 }       // ListViewItemCollection
2669
2670                 public class SelectedIndexCollection : IList, ICollection, IEnumerable
2671                 {
2672                         internal ArrayList list;
2673                         private ListView owner;
2674
2675                         #region Public Constructor
2676                         public SelectedIndexCollection (ListView owner)
2677                         {
2678                                 list = new ArrayList ();
2679                                 this.owner = owner;
2680                         }
2681                         #endregion      // Public Constructor
2682
2683                         #region Public Properties
2684                         [Browsable (false)]
2685                         public int Count {
2686                                 get { return list.Count; }
2687                         }
2688
2689                         public bool IsReadOnly {
2690                                 get { return true; }
2691                         }
2692
2693                         public int this [int index] {
2694                                 get {
2695                                         if (index < 0 || index >= list.Count)
2696                                                 throw new ArgumentOutOfRangeException ("Index out of range.");
2697                                         return (int) list [index];
2698                                 }
2699                         }
2700
2701                         bool ICollection.IsSynchronized {
2702                                 get { return list.IsSynchronized; }
2703                         }
2704
2705                         object ICollection.SyncRoot {
2706                                 get { return this; }
2707                         }
2708
2709                         bool IList.IsFixedSize {
2710                                 get { return true; }
2711                         }
2712
2713                         object IList.this [int index] {
2714                                 get { return this [index]; }
2715                                 set { throw new NotSupportedException ("SetItem operation is not supported."); }
2716                         }
2717                         #endregion      // Public Properties
2718
2719                         #region Public Methods
2720                         public bool Contains (int selectedIndex)
2721                         {
2722                                 return list.Contains (selectedIndex);
2723                         }
2724
2725                         public void CopyTo (Array dest, int index)
2726                         {
2727                                 list.CopyTo (dest, index);
2728                         }
2729
2730                         public IEnumerator GetEnumerator ()
2731                         {
2732                                 return list.GetEnumerator ();
2733                         }
2734
2735                         int IList.Add (object value)
2736                         {
2737                                 throw new NotSupportedException ("Add operation is not supported.");
2738                         }
2739
2740                         void IList.Clear ()
2741                         {
2742                                 throw new NotSupportedException ("Clear operation is not supported.");
2743                         }
2744
2745                         bool IList.Contains (object selectedIndex)
2746                         {
2747                                 return list.Contains (selectedIndex);
2748                         }
2749
2750                         int IList.IndexOf (object selectedIndex)
2751                         {
2752                                 return list.IndexOf (selectedIndex);
2753                         }
2754
2755                         void IList.Insert (int index, object value)
2756                         {
2757                                 throw new NotSupportedException ("Insert operation is not supported.");
2758                         }
2759
2760                         void IList.Remove (object value)
2761                         {
2762                                 throw new NotSupportedException ("Remove operation is not supported.");
2763                         }
2764
2765                         void IList.RemoveAt (int index)
2766                         {
2767                                 throw new NotSupportedException ("RemoveAt operation is not supported.");
2768                         }
2769
2770                         public int IndexOf (int selectedIndex)
2771                         {
2772                                 return list.IndexOf (selectedIndex);
2773                         }
2774                         #endregion      // Public Methods
2775
2776                 }       // SelectedIndexCollection
2777
2778                 public class SelectedListViewItemCollection : IList, ICollection, IEnumerable
2779                 {
2780                         internal ArrayList list;
2781                         private ListView owner;
2782
2783                         #region Public Constructor
2784                         public SelectedListViewItemCollection (ListView owner)
2785                         {
2786                                 list = new ArrayList ();
2787                                 this.owner = owner;
2788                         }
2789                         #endregion      // Public Constructor
2790
2791                         #region Public Properties
2792                         [Browsable (false)]
2793                         public int Count {
2794                                 get { return list.Count; }
2795                         }
2796
2797                         public bool IsReadOnly {
2798                                 get { return true; }
2799                         }
2800
2801                         public ListViewItem this [int index] {
2802                                 get {
2803                                         if (index < 0 || index >= list.Count)
2804                                                 throw new ArgumentOutOfRangeException ("Index out of range.");
2805                                         return (ListViewItem) list [index];
2806                                 }
2807                         }
2808
2809                         bool ICollection.IsSynchronized {
2810                                 get { return list.IsSynchronized; }
2811                         }
2812
2813                         object ICollection.SyncRoot {
2814                                 get { return this; }
2815                         }
2816
2817                         bool IList.IsFixedSize {
2818                                 get { return true; }
2819                         }
2820
2821                         object IList.this [int index] {
2822                                 get { return this [index]; }
2823                                 set { throw new NotSupportedException ("SetItem operation is not supported."); }
2824                         }
2825                         #endregion      // Public Properties
2826
2827                         #region Public Methods
2828                         public void Clear ()
2829                         {
2830                                 ArrayList copy = (ArrayList) list.Clone ();
2831                                 for (int i = 0; i < copy.Count; i++)
2832                                         ((ListViewItem) copy [i]).Selected = false;
2833
2834                                 list.Clear ();
2835                         }
2836
2837                         public bool Contains (ListViewItem item)
2838                         {
2839                                 return list.Contains (item);
2840                         }
2841
2842                         public void CopyTo (Array dest, int index)
2843                         {
2844                                 list.CopyTo (dest, index);
2845                         }
2846
2847                         public IEnumerator GetEnumerator ()
2848                         {
2849                                 return list.GetEnumerator ();
2850                         }
2851
2852                         int IList.Add (object value)
2853                         {
2854                                 throw new NotSupportedException ("Add operation is not supported.");
2855                         }
2856
2857                         bool IList.Contains (object item)
2858                         {
2859                                 return list.Contains (item);
2860                         }
2861
2862                         int IList.IndexOf (object item)
2863                         {
2864                                 return list.IndexOf (item);
2865                         }
2866
2867                         void IList.Insert (int index, object value)
2868                         {
2869                                 throw new NotSupportedException ("Insert operation is not supported.");
2870                         }
2871
2872                         void IList.Remove (object value)
2873                         {
2874                                 throw new NotSupportedException ("Remove operation is not supported.");
2875                         }
2876
2877                         void IList.RemoveAt (int index)
2878                         {
2879                                 throw new NotSupportedException ("RemoveAt operation is not supported.");
2880                         }
2881
2882                         public int IndexOf (ListViewItem item)
2883                         {
2884                                 return list.IndexOf (item);
2885                         }
2886                         #endregion      // Public Methods
2887
2888                 }       // SelectedListViewItemCollection
2889
2890                 #endregion // Subclasses
2891         }
2892 }