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                         GotFocus += new EventHandler (FocusChanged);
 170                         LostFocus += new EventHandler (FocusChanged);
 171
 172                         this.SetStyle (ControlStyles.UserPaint | ControlStyles.StandardClick, false);
 173                 }
 174                 #endregion      // Public Constructors
 175
 176                 #region Private Internal Properties
 177                 internal Size CheckBoxSize {
 178                         get {
 179                                 if (this.check_boxes) {
 180                                         if (this.state_image_list != null)
 181                                                 return this.state_image_list.ImageSize;
 182                                         else
 183                                                 return ThemeEngine.Current.ListViewCheckBoxSize;
 184                                 }
 185                                 return Size.Empty;
 186                         }
 187                 }
 188
 189                 bool multiselecting;
 190
 191                 bool CanMultiselect {
 192                         get {
 193                                 if (multiselecting)
 194                                         return true;
 195                                 else if (multiselect && (XplatUI.State.ModifierKeys & (Keys.Control | Keys.Shift)) != 0)
 196                                         return true;
 197                                 else
 198                                         return false;
 199                         }
 200                 }
 201
 202                 #endregion      // Private Internal Properties
 203
 204                 #region  Protected Properties
 205                 protected override CreateParams CreateParams {
 206                         get { return base.CreateParams; }
 207                 }
 208
 209                 protected override Size DefaultSize {
 210                         get { return ThemeEngine.Current.ListViewDefaultSize; }
 211                 }
 212                 #endregion      // Protected Properties
 213
 214                 #region Public Instance Properties
 215                 [DefaultValue (ItemActivation.Standard)]
 216                 public ItemActivation Activation {
 217                         get { return activation; }
 218                         set {
 219                                 if (value != ItemActivation.Standard && value != ItemActivation.OneClick &&
 220                                         value != ItemActivation.TwoClick) {
 221                                         throw new InvalidEnumArgumentException (string.Format
 222                                                 ("Enum argument value '{0}' is not valid for Activation", value));
 223                                 }
 224
 225                                 activation = value;
 226                         }
 227                 }
 228
 229                 [DefaultValue (ListViewAlignment.Top)]
 230                 [Localizable (true)]
 231                 public ListViewAlignment Alignment {
 232                         get { return alignment; }
 233                         set {
 234                                 if (value != ListViewAlignment.Default && value != ListViewAlignment.Left &&
 235                                         value != ListViewAlignment.SnapToGrid && value != ListViewAlignment.Top) {
 236                                         throw new InvalidEnumArgumentException (string.Format
 237                                                 ("Enum argument value '{0}' is not valid for Alignment", value));
 238                                 }
 239
 240                                 if (this.alignment != value) {
 241                                         alignment = value;
 242                                         // alignment does not matter in Details/List views
 243                                         if (this.view == View.LargeIcon ||
 244                                             this.View == View.SmallIcon)
 245                                                 this.Redraw (true);
 246                                 }
 247                         }
 248                 }
 249
 250                 [DefaultValue (false)]
 251                 public bool AllowColumnReorder {
 252                         get { return allow_column_reorder; }
 253                         set { allow_column_reorder = value; }
 254                 }
 255
 256                 [DefaultValue (true)]
 257                 public bool AutoArrange {
 258                         get { return auto_arrange; }
 259                         set {
 260                                 if (auto_arrange != value) {
 261                                         auto_arrange = value;
 262                                         // autoarrange does not matter in Details/List views
 263                                         if (this.view == View.LargeIcon || this.View == View.SmallIcon)
 264                                                 this.Redraw (true);
 265                                 }
 266                         }
 267                 }
 268
 269                 public override Color BackColor {
 270                         get {
 271                                 if (background_color.IsEmpty)
 272                                         return ThemeEngine.Current.ColorWindow;
 273                                 else
 274                                         return background_color;
 275                         }
 276                         set { background_color = value; }
 277                 }
 278
 279                 [Browsable (false)]
 280                 [EditorBrowsable (EditorBrowsableState.Never)]
 281                 public override Image BackgroundImage {
 282                         get { return background_image; }
 283                         set {
 284                                 if (value == background_image)
 285                                         return;
 286
 287                                 background_image = value;
 288                                 OnBackgroundImageChanged (EventArgs.Empty);
 289                         }
 290                 }
 291
 292                 [DefaultValue (BorderStyle.Fixed3D)]
 293                 [DispId (-504)]
 294                 public BorderStyle BorderStyle {
 295                         get { return InternalBorderStyle; }
 296                         set { InternalBorderStyle = value; }
 297                 }
 298
 299                 [DefaultValue (false)]
 300                 public bool CheckBoxes {
 301                         get { return check_boxes; }
 302                         set {
 303                                 if (check_boxes != value) {
 304                                         check_boxes = value;
 305                                         this.Redraw (true);
 306                                 }
 307                         }
 308                 }
 309
 310                 [Browsable (false)]
 311                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 312                 public CheckedIndexCollection CheckedIndices {
 313                         get { return checked_indices; }
 314                 }
 315
 316                 [Browsable (false)]
 317                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 318                 public CheckedListViewItemCollection CheckedItems {
 319                         get { return checked_items; }
 320                 }
 321
 322                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
 323                 [Localizable (true)]
 324                 [MergableProperty (false)]
 325                 public ColumnHeaderCollection Columns {
 326                         get { return columns; }
 327                 }
 328
 329                 [Browsable (false)]
 330                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 331                 public ListViewItem FocusedItem {
 332                         get {
 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.Visible = true;
 917                         item_control.Location = Point.Empty;
 918
 919                         if (items.Count == 0)
 920                                 return;
 921
 922                         Size sz = large_icons ? LargeIconItemSize : SmallIconItemSize;
 923
 924                         Rectangle area = ClientRectangle;
 925
 926                         if (left_aligned) {
 927                                 rows = (int) Math.Floor ((double)(area.Height - h_scroll.Height + y_spacing) / (double)(sz.Height + y_spacing));
 928                                 if (rows <= 0)
 929                                         rows = 1;
 930                                 cols = (int) Math.Ceiling ((double)items.Count / (double)rows);
 931                         } else {
 932                                 cols = (int) Math.Floor ((double)(area.Width - v_scroll.Width + x_spacing) / (double)(sz.Width + x_spacing));
 933                                 if (cols <= 0)
 934                                         cols = 1;
 935                                 rows = (int) Math.Ceiling ((double)items.Count / (double)cols);
 936                         }
 937
 938                         layout_ht = rows * (sz.Height + y_spacing) - y_spacing;
 939                         layout_wd = cols * (sz.Width + x_spacing) - x_spacing;
 940                         item_matrix = new ListViewItem [rows, cols];
 941                         int row = 0;
 942                         int col = 0;
 943                         foreach (ListViewItem item in items) {
 944                                 int x = col * (sz.Width + x_spacing);
 945                                 int y = row * (sz.Height + y_spacing);
 946                                 item.Location = new Point (x, y);
 947                                 item.Layout ();
 948                                 item.row = row;
 949                                 item.col = col;
 950                                 item_matrix [row, col] = item;
 951                                 if (left_aligned) {
 952                                         if (++row == rows) {
 953                                                 row = 0;
 954                                                 col++;
 955                                         }
 956                                 } else {
 957                                         if (++col == cols) {
 958                                                 col = 0;
 959                                                 row++;
 960                                         }
 961                                 }
 962                         }
 963
 964                         item_control.Size = new Size (layout_wd, layout_ht);
 965                 }
 966
 967                 void LayoutHeader ()
 968                 {
 969                         if (header_style == ColumnHeaderStyle.None) {
 970                                 header_control.Visible = false;
 971                                 header_control.Size = Size.Empty;
 972                                 return;
 973                         }
 974
 975                         int x = 0;
 976                         for (int i = 0; i < Columns.Count; i++) {
 977                                 ColumnHeader col = GetReorderedColumn (i);
 978                                 col.X = x;
 979                                 col.Y = 0;
 980                                 col.CalcColumnHeader ();
 981                                 x += col.Wd;
 982                         }
 983
 984                         if (x < ClientRectangle.Width)
 985                                 x = ClientRectangle.Width;
 986
 987                         header_control.Width = x;
 988                         header_control.Height = columns [0].Ht;
 989                         header_control.Visible = true;
 990                 }
 991
 992                 void LayoutDetails ()
 993                 {
 994                         if (columns.Count == 0) {
 995                                 header_control.Visible = false;
 996                                 item_control.Visible = false;
 997                                 return;
 998                         }
 999
1000                         LayoutHeader ();
1001
1002                         item_control.Visible = true;
1003                         item_control.Location = new Point (0, header_control.Height);
1004
1005                         int y = 0;
1006                         if (items.Count > 0) {
1007                                 foreach (ListViewItem item in items) {
1008                                         item.Layout ();
1009                                         item.Location = new Point (0, y);
1010                                         y += item.Bounds.Height + 2;
1011                                 }
1012
1013                                 // some space for bottom gridline
1014                                 if (grid_lines)
1015                                         y += 2;
1016                         }
1017
1018                         layout_wd = Math.Max (header_control.Width, item_control.Width);
1019                         layout_ht = y + header_control.Height;
1020                 }
1021
1022                 private void CalculateListView (ListViewAlignment align)
1023                 {
1024                         CalcTextSize ();
1025
1026                         switch (view) {
1027                         case View.Details:
1028                                 LayoutDetails ();
1029                                 break;
1030
1031                         case View.SmallIcon:
1032                                 LayoutIcons (false, alignment == ListViewAlignment.Left, 4, 2);
1033                                 break;
1034
1035                         case View.LargeIcon:
1036                                 LayoutIcons (true, alignment == ListViewAlignment.Left,
1037                                              ThemeEngine.Current.ListViewHorizontalSpacing,
1038                                              ThemeEngine.Current.ListViewVerticalSpacing);
1039                                 break;
1040
1041                         case View.List:
1042                                 LayoutIcons (false, true, 4, 2);
1043                                 break;
1044                         }
1045
1046                         CalculateScrollBars ();
1047                 }
1048
1049                 internal void UpdateSelection (ListViewItem item)
1050                 {
1051                         if (item.Selected) {
1052
1053                                 if (!CanMultiselect && SelectedItems.Count > 0) {
1054                                         SelectedItems.Clear ();
1055                                         SelectedIndices.list.Clear ();
1056                                 }
1057
1058                                 if (!SelectedItems.Contains (item)) {
1059                                         SelectedItems.list.Add (item);
1060                                         SelectedIndices.list.Add (item.Index);
1061                                 }
1062                         } else {
1063                                 SelectedItems.list.Remove (item);
1064                                 SelectedIndices.list.Remove (item.Index);
1065                         }
1066                 }
1067
1068                 private bool KeySearchString (KeyEventArgs ke)
1069                 {
1070                         int current_tickcnt = Environment.TickCount;
1071                         if (keysearch_tickcnt > 0 && current_tickcnt - keysearch_tickcnt > keysearch_keydelay) {
1072                                 keysearch_text = string.Empty;
1073                         }
1074
1075                         keysearch_text += (char) ke.KeyData;
1076                         keysearch_tickcnt = current_tickcnt;
1077
1078                         int start = FocusedItem == null ? 0 : FocusedItem.Index;
1079                         int i = start;
1080                         while (true) {
1081                                 if (CultureInfo.CurrentCulture.CompareInfo.IsPrefix (Items[i].Text, keysearch_text,
1082                                         CompareOptions.IgnoreCase)) {
1083                                         SetFocusedItem (Items [i]);
1084                                         items [i].Selected = true;
1085                                         EnsureVisible (i);
1086                                         break;
1087                                 }
1088                                 i = (i + 1  < Items.Count) ? i+1 : 0;
1089
1090                                 if (i == start)
1091                                         break;
1092                         }
1093                         return true;
1094                 }
1095
1096                 int GetAdjustedIndex (Keys key)
1097                 {
1098                         int result = -1;
1099
1100                         if (View == View.Details) {
1101                                 if (key == Keys.Up)
1102                                         result = FocusedItem.Index - 1;
1103                                 else if (key == Keys.Down) {
1104                                         result = FocusedItem.Index + 1;
1105                                         if (result == items.Count)
1106                                                 result = -1;
1107                                 }
1108                                 return result;
1109                         }
1110
1111                         int row = FocusedItem.row;
1112                         int col = FocusedItem.col;
1113
1114                         switch (key) {
1115                         case Keys.Left:
1116                                 if (col == 0)
1117                                         return -1;
1118                                 return item_matrix [row, col - 1].Index;
1119
1120                         case Keys.Right:
1121                                 if (col == (cols - 1))
1122                                         return -1;
1123                                 while (item_matrix [row, col + 1] == null)
1124                                        row--;
1125                                 return item_matrix [row, col + 1].Index;
1126
1127                         case Keys.Up:
1128                                 if (row == 0)
1129                                         return -1;
1130                                 return item_matrix [row - 1, col].Index;
1131
1132                         case Keys.Down:
1133                                 if (row == (rows - 1) || row == Items.Count - 1)
1134                                         return -1;
1135                                 while (item_matrix [row + 1, col] == null)
1136                                        col--;
1137                                 return item_matrix [row + 1, col].Index;
1138
1139                         default:
1140                                 return -1;
1141                         }
1142                 }
1143
1144                 ListViewItem selection_start;
1145
1146                 private bool SelectItems (ArrayList sel_items)
1147                 {
1148                         bool changed = false;
1149                         multiselecting = true;
1150                         ArrayList curr_items = (ArrayList) SelectedItems.list.Clone ();
1151                         foreach (ListViewItem item in curr_items)
1152                                 if (!sel_items.Contains (item)) {
1153                                         item.Selected = false;
1154                                         changed = true;
1155                                 }
1156                         foreach (ListViewItem item in sel_items)
1157                                 if (!item.Selected) {
1158                                         item.Selected = true;
1159                                         changed = true;
1160                                 }
1161                         multiselecting = false;
1162                         return changed;
1163                 }
1164
1165                 private void UpdateMultiSelection (int index)
1166                 {
1167                         bool shift_pressed = (XplatUI.State.ModifierKeys & Keys.Shift) != 0;
1168                         bool ctrl_pressed = (XplatUI.State.ModifierKeys & Keys.Control) != 0;
1169                         ListViewItem item = items [index];
1170
1171                         if (shift_pressed && selection_start != null) {
1172                                 ArrayList list = new ArrayList ();
1173                                 int start = Math.Min (selection_start.Index, index);
1174                                 int end = Math.Max (selection_start.Index, index);
1175                                 if (View == View.Details) {
1176                                         for (int i = start; i <= end; i++)
1177                                                 list.Add (items [i]);
1178                                 } else {
1179                                         int left = Math.Min (items [start].col, items [end].col);
1180                                         int right = Math.Max (items [start].col, items [end].col);
1181                                         int top = Math.Min (items [start].row, items [end].row);
1182                                         int bottom = Math.Max (items [start].row, items [end].row);
1183                                         foreach (ListViewItem curr in items)
1184                                                 if (curr.row >= top && curr.row <= bottom &&
1185                                                     curr.col >= left && curr.col <= right)
1186                                                         list.Add (curr);
1187                                 }
1188                                 if (SelectItems (list))
1189                                         OnSelectedIndexChanged (EventArgs.Empty);
1190                         } else if (!ctrl_pressed) {
1191                                 SelectedItems.Clear ();
1192                                 SelectedIndices.list.Clear ();
1193                                 item.Selected = true;
1194                                 selection_start = item;
1195                                 OnSelectedIndexChanged (EventArgs.Empty);
1196                         }
1197                 }
1198
1199                 private void ListView_KeyDown (object sender, KeyEventArgs ke)
1200                 {
1201                         if (ke.Handled || Items.Count == 0 || !item_control.Visible)
1202                                 return;
1203
1204                         int index = -1;
1205                         ke.Handled = true;
1206
1207                         if (FocusedItem == null)
1208                                 SetFocusedItem (Items [0]);
1209
1210                         switch (ke.KeyCode) {
1211
1212                         case Keys.End:
1213                                 index = Items.Count - 1;
1214                                 break;
1215
1216                         case Keys.Home:
1217                                 index = 0;
1218                                 break;
1219
1220                         case Keys.Left:
1221                         case Keys.Right:
1222                         case Keys.Up:
1223                         case Keys.Down:
1224                                 index = GetAdjustedIndex (ke.KeyCode);
1225                                 break;
1226
1227                         default:
1228                                 ke.Handled = KeySearchString (ke);
1229                                 return;
1230                         }
1231
1232                         if (index == -1)
1233                                 return;
1234
1235                         if (MultiSelect)
1236                                 UpdateMultiSelection (index);
1237                         else if (!items [index].Selected) {
1238                                 items [index].Selected = true;
1239                                 OnSelectedIndexChanged (EventArgs.Empty);
1240                         }
1241
1242                         SetFocusedItem (items [index]);
1243                         EnsureVisible (index);
1244                 }
1245
1246
1247                 internal class ItemControl : Control {
1248
1249                         ListView owner;
1250                         ListViewItem clicked_item;
1251                         ListViewItem last_clicked_item;
1252                         bool hover_processed = false;
1253
1254                         public ItemControl (ListView owner)
1255                         {
1256                                 this.owner = owner;
1257                                 DoubleClick += new EventHandler(ItemsDoubleClick);
1258                                 MouseDown += new MouseEventHandler(ItemsMouseDown);
1259                                 MouseMove += new MouseEventHandler(ItemsMouseMove);
1260                                 MouseHover += new EventHandler(ItemsMouseHover);
1261                                 MouseUp += new MouseEventHandler(ItemsMouseUp);
1262                                 MouseWheel += new MouseEventHandler(ItemsMouseWheel);
1263                         }
1264
1265                         void ItemsDoubleClick (object sender, EventArgs e)
1266                         {
1267                                 if (owner.activation == ItemActivation.Standard && owner.ItemActivate != null)
1268                                         owner.ItemActivate (this, e);
1269                         }
1270
1271                         enum BoxSelect {
1272                                 None,
1273                                 Normal,
1274                                 Shift,
1275                                 Control
1276                         }
1277
1278                         BoxSelect box_select_mode = BoxSelect.None;
1279                         ArrayList prev_selection;
1280                         Point box_select_start;
1281
1282                         Rectangle box_select_rect;
1283                         internal Rectangle BoxSelectRectangle {
1284                                 get { return box_select_rect; }
1285                                 set {
1286                                         if (box_select_rect == value)
1287                                                 return;
1288
1289                                         InvalidateBoxSelectRect ();
1290                                         box_select_rect = value;
1291                                         InvalidateBoxSelectRect ();
1292                                 }
1293                         }
1294
1295                         void InvalidateBoxSelectRect ()
1296                         {
1297                                 if (BoxSelectRectangle.Size.IsEmpty)
1298                                         return;
1299
1300                                 Rectangle edge = BoxSelectRectangle;
1301                                 edge.X -= 1;
1302                                 edge.Y -= 1;
1303                                 edge.Width += 2;
1304                                 edge.Height = 2;
1305                                 Invalidate (edge);
1306                                 edge.Y = BoxSelectRectangle.Bottom - 1;
1307                                 Invalidate (edge);
1308                                 edge.Y = BoxSelectRectangle.Y - 1;
1309                                 edge.Width = 2;
1310                                 edge.Height = BoxSelectRectangle.Height + 2;
1311                                 Invalidate (edge);
1312                                 edge.X = BoxSelectRectangle.Right - 1;
1313                                 Invalidate (edge);
1314                         }
1315
1316                         private Rectangle CalculateBoxSelectRectangle (Point pt)
1317                         {
1318                                 int left = Math.Min (box_select_start.X, pt.X);
1319                                 int right = Math.Max (box_select_start.X, pt.X);
1320                                 int top = Math.Min (box_select_start.Y, pt.Y);
1321                                 int bottom = Math.Max (box_select_start.Y, pt.Y);
1322                                 return Rectangle.FromLTRB (left, top, right, bottom);
1323                         }
1324
1325                         ArrayList BoxSelectedItems {
1326                                 get {
1327                                         ArrayList result = new ArrayList ();
1328                                         foreach (ListViewItem item in owner.Items) {
1329                                                 Rectangle r = item.Bounds;
1330                                                 r.X += r.Width / 4;
1331                                                 r.Y += r.Height / 4;
1332                                                 r.Width /= 2;
1333                                                 r.Height /= 2;
1334                                                 if (BoxSelectRectangle.IntersectsWith (r))
1335                                                         result.Add (item);
1336                                         }
1337                                         return result;
1338                                 }
1339                         }
1340
1341                         private bool PerformBoxSelection (Point pt)
1342                         {
1343                                 if (box_select_mode == BoxSelect.None)
1344                                         return false;
1345
1346                                 BoxSelectRectangle = CalculateBoxSelectRectangle (pt);
1347
1348                                 ArrayList box_items = BoxSelectedItems;
1349
1350                                 ArrayList items;
1351
1352                                 switch (box_select_mode) {
1353
1354                                 case BoxSelect.Normal:
1355                                         items = box_items;
1356                                         break;
1357
1358                                 case BoxSelect.Control:
1359                                         items = new ArrayList ();
1360                                         foreach (ListViewItem item in prev_selection)
1361                                                 if (!box_items.Contains (item))
1362                                                         items.Add (item);
1363                                         foreach (ListViewItem item in box_items)
1364                                                 if (!prev_selection.Contains (item))
1365                                                         items.Add (item);
1366                                         break;
1367
1368                                 case BoxSelect.Shift:
1369                                         items = box_items;
1370                                         foreach (ListViewItem item in box_items)
1371                                                 prev_selection.Remove (item);
1372                                         foreach (ListViewItem item in prev_selection)
1373                                                 items.Add (item);
1374                                         break;
1375
1376                                 default:
1377                                         throw new Exception ("Unexpected Selection mode: " + box_select_mode);
1378                                 }
1379
1380                                 SuspendLayout ();
1381                                 owner.SelectItems (items);
1382                                 ResumeLayout ();
1383
1384                                 return true;
1385                         }
1386
1387                         private void ItemsMouseDown (object sender, MouseEventArgs me)
1388                         {
1389                                 if (owner.items.Count == 0)
1390                                         return;
1391
1392                                 Point pt = new Point (me.X, me.Y);
1393                                 foreach (ListViewItem item in owner.items) {
1394                                         if (item.CheckRectReal.Contains (pt)) {
1395                                                 CheckState curr_state = item.Checked ?  CheckState.Checked : CheckState.Unchecked;
1396                                                 item.Checked = !item.Checked;
1397
1398                                                 CheckState new_state = item.Checked ?  CheckState.Checked : CheckState.Unchecked;
1399
1400                                                 // Raise the ItemCheck event
1401                                                 ItemCheckEventArgs ice = new ItemCheckEventArgs (item.Index, curr_state, new_state);
1402                                                 owner.OnItemCheck (ice);
1403                                                 break;
1404                                         }
1405
1406                                         if (owner.View == View.Details && !owner.FullRowSelect) {
1407                                                 if (item.GetBounds (ItemBoundsPortion.Label).Contains (pt)) {
1408                                                         clicked_item = item;
1409                                                         break;
1410                                                 }
1411                                         } else {
1412                                                 if (item.Bounds.Contains (pt)) {
1413                                                         clicked_item = item;
1414                                                         break;
1415                                                 }
1416                                         }
1417                                 }
1418
1419
1420                                 if (clicked_item != null) {
1421                                         owner.SetFocusedItem (clicked_item);
1422                                         bool changed = !clicked_item.Selected;
1423                                         if (owner.MultiSelect && (XplatUI.State.ModifierKeys & Keys.Control) == 0)
1424                                                 owner.UpdateMultiSelection (clicked_item.Index);
1425                                         else
1426                                                 clicked_item.Selected = true;
1427
1428                                         if (changed)
1429                                                 owner.OnSelectedIndexChanged (EventArgs.Empty);
1430
1431                                         // Raise double click if the item was clicked. On MS the
1432                                         // double click is only raised if you double click an item
1433                                         if (me.Clicks > 1 && clicked_item != null)
1434                                                 owner.OnDoubleClick (EventArgs.Empty);
1435                                         else if (me.Clicks == 1 && clicked_item != null)
1436                                                 owner.OnClick (EventArgs.Empty);
1437                                 } else {
1438                                         if (owner.MultiSelect) {
1439                                                 Keys mods = XplatUI.State.ModifierKeys;
1440                                                 if ((mods & Keys.Shift) != 0)
1441                                                         box_select_mode = BoxSelect.Shift;
1442                                                 else if ((mods & Keys.Control) != 0)
1443                                                         box_select_mode = BoxSelect.Control;
1444                                                 else
1445                                                         box_select_mode = BoxSelect.Normal;
1446                                                 box_select_start = pt;
1447                                                 prev_selection = (ArrayList) owner.SelectedItems.list.Clone ();
1448                                         } else if (owner.selected_indices.Count > 0) {
1449                                                 owner.SelectedItems.Clear ();
1450                                                 owner.SelectedIndices.list.Clear ();
1451                                                 owner.OnSelectedIndexChanged (EventArgs.Empty);
1452                                         }
1453                                 }
1454                         }
1455
1456                         private void ItemsMouseMove (object sender, MouseEventArgs me)
1457                         {
1458                                 if (PerformBoxSelection (new Point (me.X, me.Y)))
1459                                         return;
1460
1461                                 if (owner.HoverSelection && hover_processed) {
1462
1463                                         Point pt = PointToClient (Control.MousePosition);
1464                                         ListViewItem item = owner.GetItemAt (pt.X, pt.Y);
1465                                         if (item == null || item.Selected)
1466                                                 return;
1467
1468                                         hover_processed = false;
1469                                         XplatUI.ResetMouseHover (Handle);
1470                                 }
1471                         }
1472
1473
1474                         private void ItemsMouseHover (object sender, EventArgs e)
1475                         {
1476                                 if (Capture || !owner.HoverSelection)
1477                                         return;
1478
1479                                 hover_processed = true;
1480                                 Point pt = PointToClient (Control.MousePosition);
1481                                 ListViewItem item = owner.GetItemAt (pt.X, pt.Y);
1482
1483                                 if (item == null)
1484                                         return;
1485
1486                                 item.Selected = true;
1487                                 owner.OnSelectedIndexChanged (new EventArgs ());
1488                         }
1489
1490                         private void ItemsMouseUp (object sender, MouseEventArgs me)
1491                         {
1492                                 Capture = false;
1493                                 if (owner.Items.Count == 0)
1494                                         return;
1495
1496                                 Point pt = new Point (me.X, me.Y);
1497
1498                                 Rectangle rect = Rectangle.Empty;
1499                                 if (clicked_item != null) {
1500                                         if (owner.view == View.Details && !owner.full_row_select)
1501                                                 rect = clicked_item.GetBounds (ItemBoundsPortion.Label);
1502                                         else
1503                                                 rect = clicked_item.Bounds;
1504
1505                                         if (rect.Contains (pt)) {
1506                                                 switch (owner.activation) {
1507                                                 case ItemActivation.OneClick:
1508                                                         owner.OnItemActivate (EventArgs.Empty);
1509                                                         break;
1510
1511                                                 case ItemActivation.TwoClick:
1512                                                         if (last_clicked_item == clicked_item) {
1513                                                                 owner.OnItemActivate (EventArgs.Empty);
1514                                                                 last_clicked_item = null;
1515                                                         } else
1516                                                                 last_clicked_item = clicked_item;
1517                                                         break;
1518                                                 default:
1519                                                         // DoubleClick activation is handled in another handler
1520                                                         break;
1521                                                 }
1522                                         }
1523                                 } else if (owner.SelectedItems.Count > 0 && BoxSelectRectangle.Size.IsEmpty) {
1524                                         // Need this to clean up background clicks
1525                                         owner.SelectedItems.Clear ();
1526                                         owner.SelectedIndices.list.Clear ();
1527                                         owner.OnSelectedIndexChanged (EventArgs.Empty);
1528                                 }
1529
1530                                 clicked_item = null;
1531                                 box_select_start = Point.Empty;
1532                                 BoxSelectRectangle = Rectangle.Empty;
1533                                 prev_selection = null;
1534                                 box_select_mode = BoxSelect.None;
1535                         }
1536
1537                         private void ItemsMouseWheel (object sender, MouseEventArgs me)
1538                         {
1539                                 if (owner.Items.Count == 0)
1540                                         return;
1541
1542                                 int lines = me.Delta / 120;
1543
1544                                 if (lines == 0)
1545                                         return;
1546
1547                                 switch (owner.View) {
1548                                 case View.Details:
1549                                 case View.SmallIcon:
1550                                         owner.Scroll (owner.v_scroll, -owner.Items [0].Bounds.Height * SystemInformation.MouseWheelScrollLines * lines);
1551                                         break;
1552                                 case View.LargeIcon:
1553                                         owner.Scroll (owner.v_scroll, -(owner.Items [0].Bounds.Height + ThemeEngine.Current.ListViewVerticalSpacing)  * lines);
1554                                         break;
1555                                 case View.List:
1556                                         owner.Scroll (owner.h_scroll, -owner.Items [0].Bounds.Width * lines);
1557                                         break;
1558                                 }
1559                         }
1560
1561                         internal override void OnPaintInternal (PaintEventArgs pe)
1562                         {
1563                                 ThemeEngine.Current.DrawListViewItems (pe.Graphics, pe.ClipRectangle, owner);
1564                         }
1565
1566                         protected override void WndProc (ref Message m)
1567                         {
1568                                 switch ((Msg)m.Msg) {
1569                                 case Msg.WM_SETFOCUS:
1570                                         owner.Focus ();
1571                                         break;
1572                                 default:
1573                                         base.WndProc (ref m);
1574                                         break;
1575                                 }
1576                         }
1577                 }
1578
1579                 internal override void OnPaintInternal (PaintEventArgs pe)
1580                 {
1581                         if (updating)
1582                                 return;
1583
1584                         CalculateScrollBars ();
1585                 }
1586
1587                 void FocusChanged (object o, EventArgs args)
1588                 {
1589                         if (Items.Count == 0)
1590                                 return;
1591
1592                         if (FocusedItem == null)
1593                                 SetFocusedItem (Items [0]);
1594
1595                         item_control.Invalidate (FocusedItem.Bounds);
1596                 }
1597
1598                 private void ListView_SizeChanged (object sender, EventArgs e)
1599                 {
1600                         CalculateListView (alignment);
1601                 }
1602
1603                 private void SetFocusedItem (ListViewItem item)
1604                 {
1605                         if (focused_item != null)
1606                                 focused_item.Focused = false;
1607
1608                         if (item != null)
1609                                 item.Focused = true;
1610
1611                         focused_item = item;
1612                 }
1613
1614                 private void HorizontalScroller (object sender, EventArgs e)
1615                 {
1616                         // Avoid unnecessary flickering, when button is
1617                         // kept pressed at the end
1618                         if (h_marker != h_scroll.Value) {
1619
1620                                 int pixels =  h_marker - h_scroll.Value;
1621
1622                                 h_marker = h_scroll.Value;
1623                                 if (header_control.Visible)
1624                                         XplatUI.ScrollWindow (header_control.Handle, pixels, 0, false);
1625
1626                                 XplatUI.ScrollWindow (item_control.Handle, pixels, 0, false);
1627                         }
1628                 }
1629
1630                 private void VerticalScroller (object sender, EventArgs e)
1631                 {
1632                         // Avoid unnecessary flickering, when button is
1633                         // kept pressed at the end
1634                         if (v_marker != v_scroll.Value) {
1635                                 int pixels =  v_marker - v_scroll.Value;
1636                                 Rectangle area = item_control.ClientRectangle;
1637                                 v_marker = v_scroll.Value;
1638                                 XplatUI.ScrollWindow (item_control.Handle, area, 0, pixels, false);
1639                         }
1640                 }
1641                 #endregion      // Internal Methods Properties
1642
1643                 #region Protected Methods
1644                 protected override void CreateHandle ()
1645                 {
1646                         base.CreateHandle ();
1647                 }
1648
1649                 protected override void Dispose (bool disposing)
1650                 {
1651                         if (disposing) {
1652                                 h_scroll.Dispose ();
1653                                 v_scroll.Dispose ();
1654
1655                                 large_image_list = null;
1656                                 small_image_list = null;
1657                                 state_image_list = null;
1658                         }
1659
1660                         base.Dispose (disposing);
1661                 }
1662
1663                 protected override bool IsInputKey (Keys keyData)
1664                 {
1665                         switch (keyData) {
1666                         case Keys.Up:
1667                         case Keys.Down:
1668                         case Keys.PageUp:
1669                         case Keys.PageDown:
1670                         case Keys.Right:
1671                         case Keys.Left:
1672                         case Keys.End:
1673                         case Keys.Home:
1674                                 return true;
1675
1676                         default:
1677                                 break;
1678                         }
1679
1680                         return base.IsInputKey (keyData);
1681                 }
1682
1683                 protected virtual void OnAfterLabelEdit (LabelEditEventArgs e)
1684                 {
1685                         if (AfterLabelEdit != null)
1686                                 AfterLabelEdit (this, e);
1687                 }
1688
1689                 protected virtual void OnBeforeLabelEdit (LabelEditEventArgs e)
1690                 {
1691                         if (BeforeLabelEdit != null)
1692                                 BeforeLabelEdit (this, e);
1693                 }
1694
1695                 protected virtual void OnColumnClick (ColumnClickEventArgs e)
1696                 {
1697                         if (ColumnClick != null)
1698                                 ColumnClick (this, e);
1699                 }
1700
1701                 protected override void OnEnabledChanged (EventArgs e)
1702                 {
1703                         base.OnEnabledChanged (e);
1704                 }
1705
1706                 protected override void OnFontChanged (EventArgs e)
1707                 {
1708                         base.OnFontChanged (e);
1709                         Redraw (true);
1710                 }
1711
1712                 protected override void OnHandleCreated (EventArgs e)
1713                 {
1714                         base.OnHandleCreated (e);
1715                 }
1716
1717                 protected override void OnHandleDestroyed (EventArgs e)
1718                 {
1719                         base.OnHandleDestroyed (e);
1720                 }
1721
1722                 protected virtual void OnItemActivate (EventArgs e)
1723                 {
1724                         if (ItemActivate != null)
1725                                 ItemActivate (this, e);
1726                 }
1727
1728                 protected virtual void OnItemCheck (ItemCheckEventArgs ice)
1729                 {
1730                         if (ItemCheck != null)
1731                                 ItemCheck (this, ice);
1732                 }
1733
1734                 protected virtual void OnItemDrag (ItemDragEventArgs e)
1735                 {
1736                         if (ItemDrag != null)
1737                                 ItemDrag (this, e);
1738                 }
1739
1740                 protected virtual void OnSelectedIndexChanged (EventArgs e)
1741                 {
1742                         if (SelectedIndexChanged != null)
1743                                 SelectedIndexChanged (this, e);
1744                 }
1745
1746                 protected override void OnSystemColorsChanged (EventArgs e)
1747                 {
1748                         base.OnSystemColorsChanged (e);
1749                 }
1750
1751                 protected void RealizeProperties ()
1752                 {
1753                         // FIXME: TODO
1754                 }
1755
1756                 protected void UpdateExtendedStyles ()
1757                 {
1758                         // FIXME: TODO
1759                 }
1760
1761                 protected override void WndProc (ref Message m)
1762                 {
1763                         base.WndProc (ref m);
1764                 }
1765                 #endregion // Protected Methods
1766
1767                 #region Public Instance Methods
1768                 public void ArrangeIcons ()
1769                 {
1770                         ArrangeIcons (this.alignment);
1771                 }
1772
1773                 public void ArrangeIcons (ListViewAlignment alignment)
1774                 {
1775                         // Icons are arranged only if view is set to LargeIcon or SmallIcon
1776                         if (view == View.LargeIcon || view == View.SmallIcon) {
1777                                 this.CalculateListView (alignment);
1778                                 // we have done the calculations already
1779                                 this.Redraw (false);
1780                         }
1781                 }
1782
1783                 public void BeginUpdate ()
1784                 {
1785                         // flag to avoid painting
1786                         updating = true;
1787                 }
1788
1789                 public void Clear ()
1790                 {
1791                         columns.Clear ();
1792                         items.Clear (); // Redraw (true) called here
1793                 }
1794
1795                 public void EndUpdate ()
1796                 {
1797                         // flag to avoid painting
1798                         updating = false;
1799
1800                         // probably, now we need a redraw with recalculations
1801                         this.Redraw (true);
1802                 }
1803
1804                 public void EnsureVisible (int index)
1805                 {
1806                         if (index < 0 || index >= items.Count || scrollable == false)
1807                                 return;
1808
1809                         Rectangle view_rect = item_control.ClientRectangle;
1810                         Rectangle bounds = items [index].Bounds;
1811
1812                         if (view_rect.Contains (bounds))
1813                                 return;
1814
1815                         if (bounds.Left < 0)
1816                                 h_scroll.Value += bounds.Left;
1817                         else if (bounds.Right > view_rect.Right)
1818                                 h_scroll.Value += (bounds.Right - view_rect.Right);
1819
1820                         if (bounds.Top < 0)
1821                                 v_scroll.Value += bounds.Top;
1822                         else if (bounds.Bottom > view_rect.Bottom)
1823                                 v_scroll.Value += (bounds.Bottom - view_rect.Bottom);
1824                 }
1825
1826                 public ListViewItem GetItemAt (int x, int y)
1827                 {
1828                         foreach (ListViewItem item in items) {
1829                                 if (item.Bounds.Contains (x, y))
1830                                         return item;
1831                         }
1832                         return null;
1833                 }
1834
1835                 public Rectangle GetItemRect (int index)
1836                 {
1837                         return GetItemRect (index, ItemBoundsPortion.Entire);
1838                 }
1839
1840                 public Rectangle GetItemRect (int index, ItemBoundsPortion portion)
1841                 {
1842                         if (index < 0 || index >= items.Count)
1843                                 throw new IndexOutOfRangeException ("index");
1844
1845                         return items [index].GetBounds (portion);
1846                 }
1847
1848                 public void Sort ()
1849                 {
1850                         if (sort_order != SortOrder.None)
1851                                 items.list.Sort (item_sorter);
1852
1853                         if (sort_order == SortOrder.Descending)
1854                                 items.list.Reverse ();
1855
1856                         this.Redraw (true);
1857                 }
1858
1859                 public override string ToString ()
1860                 {
1861                         int count = this.Items.Count;
1862
1863                         if (count == 0)
1864                                 return string.Format ("System.Windows.Forms.ListView, Items.Count: 0");
1865                         else
1866                                 return string.Format ("System.Windows.Forms.ListView, Items.Count: {0}, Items[0]: {1}", count, this.Items [0].ToString ());
1867                 }
1868                 #endregion      // Public Instance Methods
1869
1870
1871                 #region Subclasses
1872
1873                 class HeaderControl : Control {
1874
1875                         ListView owner;
1876                         bool column_resize_active = false;
1877                         ColumnHeader resize_column;
1878                         ColumnHeader clicked_column;
1879                         ColumnHeader drag_column;
1880                         int drag_x;
1881                         int drag_to_index = -1;
1882
1883                         public HeaderControl (ListView owner)
1884                         {
1885                                 this.owner = owner;
1886                                 MouseDown += new MouseEventHandler (HeaderMouseDown);
1887                                 MouseMove += new MouseEventHandler (HeaderMouseMove);
1888                                 MouseUp += new MouseEventHandler (HeaderMouseUp);
1889                         }
1890
1891                         private ColumnHeader ColumnAtX (int x)
1892                         {
1893                                 Point pt = new Point (x, 0);
1894                                 ColumnHeader result = null;
1895                                 foreach (ColumnHeader col in owner.Columns) {
1896                                         if (col.Rect.Contains (pt)) {
1897                                                 result = col;
1898                                                 break;
1899                                         }
1900                                 }
1901                                 return result;
1902                         }
1903
1904                         private int GetReorderedIndex (ColumnHeader col)
1905                         {
1906                                 if (owner.reordered_column_indices == null)
1907                                         return col.Index;
1908                                 else
1909                                         for (int i = 0; i < owner.Columns.Count; i++)
1910                                                 if (owner.reordered_column_indices [i] == col.Index)
1911                                                         return i;
1912                                 throw new Exception ("Column index missing from reordered array");
1913                         }
1914
1915                         private void HeaderMouseDown (object sender, MouseEventArgs me)
1916                         {
1917                                 if (resize_column != null) {
1918                                         column_resize_active = true;
1919                                         Capture = true;
1920                                         return;
1921                                 }
1922
1923                                 clicked_column = ColumnAtX (me.X + owner.h_marker);
1924
1925                                 if (clicked_column != null) {
1926                                         Capture = true;
1927                                         if (owner.AllowColumnReorder) {
1928                                                 drag_x = me.X;
1929                                                 drag_column = (ColumnHeader) (clicked_column as ICloneable).Clone ();
1930                                                 drag_column.column_rect = clicked_column.Rect;
1931                                                 drag_to_index = GetReorderedIndex (clicked_column);
1932                                         }
1933                                         clicked_column.pressed = true;
1934                                         Rectangle bounds = clicked_column.Rect;
1935                                         bounds.X -= owner.h_marker;
1936                                         Invalidate (bounds);
1937                                         return;
1938                                 }
1939                         }
1940
1941                         private void HeaderMouseMove (object sender, MouseEventArgs me)
1942                         {
1943                                 Point pt = new Point (me.X + owner.h_marker, me.Y);
1944
1945                                 if (column_resize_active)  {
1946                                         resize_column.Width = pt.X - resize_column.X;
1947                                         if (resize_column.Width < 0)
1948                                                 resize_column.Width = 0;
1949                                         return;
1950                                 }
1951
1952                                 resize_column = null;
1953
1954                                 if (clicked_column != null) {
1955                                         if (owner.AllowColumnReorder) {
1956                                                 Rectangle r;
1957
1958                                                 r = drag_column.column_rect;
1959                                                 r.X = clicked_column.Rect.X + me.X - drag_x;
1960                                                 drag_column.column_rect = r;
1961
1962                                                 int x = me.X + owner.h_marker;
1963                                                 ColumnHeader over = ColumnAtX (x);
1964                                                 if (over == null)
1965                                                         drag_to_index = owner.Columns.Count;
1966                                                 else if (x < over.X + over.Width / 2)
1967                                                         drag_to_index = GetReorderedIndex (over);
1968                                                 else
1969                                                         drag_to_index = GetReorderedIndex (over) + 1;
1970                                                 Invalidate ();
1971                                         } else {
1972                                                 ColumnHeader over = ColumnAtX (me.X + owner.h_marker);
1973                                                 bool pressed = clicked_column.pressed;
1974                                                 clicked_column.pressed = over == clicked_column;
1975                                                 if (clicked_column.pressed ^ pressed) {
1976                                                         Rectangle bounds = clicked_column.Rect;
1977                                                         bounds.X -= owner.h_marker;
1978                                                         Invalidate (bounds);
1979                                                 }
1980                                         }
1981                                         return;
1982                                 }
1983
1984                                 for (int i = 0; i < owner.Columns.Count; i++) {
1985                                         Rectangle zone = owner.Columns [i].Rect;
1986                                         zone.X = zone.Right - 5;
1987                                         zone.Width = 10;
1988                                         if (zone.Contains (pt)) {
1989                                                 if (i < owner.Columns.Count - 1 && owner.Columns [i + 1].Width == 0)
1990                                                         i++;
1991                                                 resize_column = owner.Columns [i];
1992                                                 break;
1993                                         }
1994                                 }
1995
1996                                 if (resize_column == null)
1997                                         Cursor = Cursors.Default;
1998                                 else
1999                                         Cursor = Cursors.VSplit;
2000                         }
2001
2002                         void HeaderMouseUp (object sender, MouseEventArgs me)
2003                         {
2004                                 Capture = false;
2005
2006                                 if (column_resize_active) {
2007                                         column_resize_active = false;
2008                                         resize_column = null;
2009                                         Cursor = Cursors.Default;
2010                                         return;
2011                                 }
2012
2013                                 if (clicked_column != null && clicked_column.pressed) {
2014                                         clicked_column.pressed = false;
2015                                         Rectangle bounds = clicked_column.Rect;
2016                                         bounds.X -= owner.h_marker;
2017                                         Invalidate (bounds);
2018                                         owner.OnColumnClick (new ColumnClickEventArgs (clicked_column.Index));
2019                                 }
2020
2021                                 if (drag_column != null && owner.AllowColumnReorder) {
2022                                         drag_column = null;
2023                                         if (drag_to_index > GetReorderedIndex (clicked_column))
2024                                                 drag_to_index--;
2025                                         if (owner.GetReorderedColumn (drag_to_index) != clicked_column)
2026                                                 owner.ReorderColumn (clicked_column, drag_to_index);
2027                                         drag_to_index = -1;
2028                                         Invalidate ();
2029                                 }
2030
2031                                 clicked_column = null;
2032                         }
2033
2034                         internal override void OnPaintInternal (PaintEventArgs pe)
2035                         {
2036                                 if (owner.updating)
2037                                         return;
2038
2039                                 Theme theme = ThemeEngine.Current;
2040                                 theme.DrawListViewHeader (pe.Graphics, pe.ClipRectangle, this.owner);
2041
2042                                 if (drag_column == null)
2043                                         return;
2044
2045                                 int target_x;
2046                                 if (drag_to_index == owner.Columns.Count)
2047                                         target_x = owner.GetReorderedColumn (drag_to_index - 1).Rect.Right - owner.h_marker;
2048                                 else
2049                                         target_x = owner.GetReorderedColumn (drag_to_index).Rect.X - owner.h_marker;
2050                                 theme.DrawListViewHeaderDragDetails (pe.Graphics, owner, drag_column, target_x);
2051                         }
2052
2053                         protected override void WndProc (ref Message m)
2054                         {
2055                                 switch ((Msg)m.Msg) {
2056                                 case Msg.WM_SETFOCUS:
2057                                         owner.Focus ();
2058                                         break;
2059                                 default:
2060                                         base.WndProc (ref m);
2061                                         break;
2062                                 }
2063                         }
2064                 }
2065
2066                 public class CheckedIndexCollection : IList, ICollection, IEnumerable
2067                 {
2068                         internal ArrayList list;
2069                         private ListView owner;
2070
2071                         #region Public Constructor
2072                         public CheckedIndexCollection (ListView owner)
2073                         {
2074                                 list = new ArrayList ();
2075                                 this.owner = owner;
2076                         }
2077                         #endregion      // Public Constructor
2078
2079                         #region Public Properties
2080                         [Browsable (false)]
2081                         public int Count {
2082                                 get { return list.Count; }
2083                         }
2084
2085                         public bool IsReadOnly {
2086                                 get { return true; }
2087                         }
2088
2089                         public int this [int index] {
2090                                 get {
2091                                         if (index < 0 || index >= list.Count)
2092                                                 throw new ArgumentOutOfRangeException ("index");
2093                                         return (int) list [index];
2094                                 }
2095                         }
2096
2097                         bool ICollection.IsSynchronized {
2098                                 get { return false; }
2099                         }
2100
2101                         object ICollection.SyncRoot {
2102                                 get { return this; }
2103                         }
2104
2105                         bool IList.IsFixedSize {
2106                                 get { return true; }
2107                         }
2108
2109                         object IList.this [int index] {
2110                                 get { return this [index]; }
2111                                 set { throw new NotSupportedException ("SetItem operation is not supported."); }
2112                         }
2113                         #endregion      // Public Properties
2114
2115                         #region Public Methods
2116                         public bool Contains (int checkedIndex)
2117                         {
2118                                 return list.Contains (checkedIndex);
2119                         }
2120
2121                         public IEnumerator GetEnumerator ()
2122                         {
2123                                 return list.GetEnumerator ();
2124                         }
2125
2126                         void ICollection.CopyTo (Array dest, int index)
2127                         {
2128                                 list.CopyTo (dest, index);
2129                         }
2130
2131                         int IList.Add (object value)
2132                         {
2133                                 throw new NotSupportedException ("Add operation is not supported.");
2134                         }
2135
2136                         void IList.Clear ()
2137                         {
2138                                 throw new NotSupportedException ("Clear operation is not supported.");
2139                         }
2140
2141                         bool IList.Contains (object checkedIndex)
2142                         {
2143                                 return list.Contains (checkedIndex);
2144                         }
2145
2146                         int IList.IndexOf (object checkedIndex)
2147                         {
2148                                 return list.IndexOf (checkedIndex);
2149                         }
2150
2151                         void IList.Insert (int index, object value)
2152                         {
2153                                 throw new NotSupportedException ("Insert operation is not supported.");
2154                         }
2155
2156                         void IList.Remove (object value)
2157                         {
2158                                 throw new NotSupportedException ("Remove operation is not supported.");
2159                         }
2160
2161                         void IList.RemoveAt (int index)
2162                         {
2163                                 throw new NotSupportedException ("RemoveAt operation is not supported.");
2164                         }
2165
2166                         public int IndexOf (int checkedIndex)
2167                         {
2168                                 return list.IndexOf (checkedIndex);
2169                         }
2170                         #endregion      // Public Methods
2171
2172                 }       // CheckedIndexCollection
2173
2174                 public class CheckedListViewItemCollection : IList, ICollection, IEnumerable
2175                 {
2176                         internal ArrayList list;
2177                         private ListView owner;
2178
2179                         #region Public Constructor
2180                         public CheckedListViewItemCollection (ListView owner)
2181                         {
2182                                 list = new ArrayList ();
2183                                 this.owner = owner;
2184                         }
2185                         #endregion      // Public Constructor
2186
2187                         #region Public Properties
2188                         [Browsable (false)]
2189                         public int Count {
2190                                 get { return list.Count; }
2191                         }
2192
2193                         public bool IsReadOnly {
2194                                 get { return true; }
2195                         }
2196
2197                         public ListViewItem this [int index] {
2198                                 get {
2199                                         if (index < 0 || index >= list.Count)
2200                                                 throw new ArgumentOutOfRangeException ("index");
2201                                         return (ListViewItem) list [index];
2202                                 }
2203                         }
2204
2205                         bool ICollection.IsSynchronized {
2206                                 get { return list.IsSynchronized; }
2207                         }
2208
2209                         object ICollection.SyncRoot {
2210                                 get { return this; }
2211                         }
2212
2213                         bool IList.IsFixedSize {
2214                                 get { return true; }
2215                         }
2216
2217                         object IList.this [int index] {
2218                                 get { return this [index]; }
2219                                 set { throw new NotSupportedException ("SetItem operation is not supported."); }
2220                         }
2221                         #endregion      // Public Properties
2222
2223                         #region Public Methods
2224                         public bool Contains (ListViewItem item)
2225                         {
2226                                 return list.Contains (item);
2227                         }
2228
2229                         public void CopyTo (Array dest, int index)
2230                         {
2231                                 list.CopyTo (dest, index);
2232                         }
2233
2234                         public IEnumerator GetEnumerator ()
2235                         {
2236                                 return list.GetEnumerator ();
2237                         }
2238
2239                         int IList.Add (object value)
2240                         {
2241                                 throw new NotSupportedException ("Add operation is not supported.");
2242                         }
2243
2244                         void IList.Clear ()
2245                         {
2246                                 throw new NotSupportedException ("Clear operation is not supported.");
2247                         }
2248
2249                         bool IList.Contains (object item)
2250                         {
2251                                 return list.Contains (item);
2252                         }
2253
2254                         int IList.IndexOf (object item)
2255                         {
2256                                 return list.IndexOf (item);
2257                         }
2258
2259                         void IList.Insert (int index, object value)
2260                         {
2261                                 throw new NotSupportedException ("Insert operation is not supported.");
2262                         }
2263
2264                         void IList.Remove (object value)
2265                         {
2266                                 throw new NotSupportedException ("Remove operation is not supported.");
2267                         }
2268
2269                         void IList.RemoveAt (int index)
2270                         {
2271                                 throw new NotSupportedException ("RemoveAt operation is not supported.");
2272                         }
2273
2274                         public int IndexOf (ListViewItem item)
2275                         {
2276                                 return list.IndexOf (item);
2277                         }
2278                         #endregion      // Public Methods
2279
2280                 }       // CheckedListViewItemCollection
2281
2282                 public class ColumnHeaderCollection : IList, ICollection, IEnumerable
2283                 {
2284                         internal ArrayList list;
2285                         private ListView owner;
2286
2287                         #region Public Constructor
2288                         public ColumnHeaderCollection (ListView owner)
2289                         {
2290                                 list = new ArrayList ();
2291                                 this.owner = owner;
2292                         }
2293                         #endregion      // Public Constructor
2294
2295                         #region Public Properties
2296                         [Browsable (false)]
2297                         public int Count {
2298                                 get { return list.Count; }
2299                         }
2300
2301                         public bool IsReadOnly {
2302                                 get { return false; }
2303                         }
2304
2305                         public virtual ColumnHeader this [int index] {
2306                                 get {
2307                                         if (index < 0 || index >= list.Count)
2308                                                 throw new ArgumentOutOfRangeException ("index");
2309                                         return (ColumnHeader) list [index];
2310                                 }
2311                         }
2312
2313                         bool ICollection.IsSynchronized {
2314                                 get { return true; }
2315                         }
2316
2317                         object ICollection.SyncRoot {
2318                                 get { return this; }
2319                         }
2320
2321                         bool IList.IsFixedSize {
2322                                 get { return list.IsFixedSize; }
2323                         }
2324
2325                         object IList.this [int index] {
2326                                 get { return this [index]; }
2327                                 set { throw new NotSupportedException ("SetItem operation is not supported."); }
2328                         }
2329                         #endregion      // Public Properties
2330
2331                         #region Public Methods
2332                         public virtual int Add (ColumnHeader value)
2333                         {
2334                                 int idx;
2335                                 value.owner = this.owner;
2336                                 idx = list.Add (value);
2337                                 if (owner.IsHandleCreated) {
2338                                         owner.Redraw (true);
2339                                 }
2340                                 return idx;
2341                         }
2342
2343                         public virtual ColumnHeader Add (string str, int width, HorizontalAlignment textAlign)
2344                         {
2345                                 ColumnHeader colHeader = new ColumnHeader (this.owner, str, textAlign, width);
2346                                 this.Add (colHeader);
2347                                 return colHeader;
2348                         }
2349
2350                         public virtual void AddRange (ColumnHeader [] values)
2351                         {
2352                                 foreach (ColumnHeader colHeader in values) {
2353                                         colHeader.owner = this.owner;
2354                                         Add (colHeader);
2355                                 }
2356
2357                                 owner.Redraw (true);
2358                         }
2359
2360                         public virtual void Clear ()
2361                         {
2362                                 list.Clear ();
2363                                 owner.Redraw (true);
2364                         }
2365
2366                         public bool Contains (ColumnHeader value)
2367                         {
2368                                 return list.Contains (value);
2369                         }
2370
2371                         public IEnumerator GetEnumerator ()
2372                         {
2373                                 return list.GetEnumerator ();
2374                         }
2375
2376                         void ICollection.CopyTo (Array dest, int index)
2377                         {
2378                                 list.CopyTo (dest, index);
2379                         }
2380
2381                         int IList.Add (object value)
2382                         {
2383                                 if (! (value is ColumnHeader)) {
2384                                         throw new ArgumentException ("Not of type ColumnHeader", "value");
2385                                 }
2386
2387                                 return this.Add ((ColumnHeader) value);
2388                         }
2389
2390                         bool IList.Contains (object value)
2391                         {
2392                                 if (! (value is ColumnHeader)) {
2393                                         throw new ArgumentException ("Not of type ColumnHeader", "value");
2394                                 }
2395
2396                                 return this.Contains ((ColumnHeader) value);
2397                         }
2398
2399                         int IList.IndexOf (object value)
2400                         {
2401                                 if (! (value is ColumnHeader)) {
2402                                         throw new ArgumentException ("Not of type ColumnHeader", "value");
2403                                 }
2404
2405                                 return this.IndexOf ((ColumnHeader) value);
2406                         }
2407
2408                         void IList.Insert (int index, object value)
2409                         {
2410                                 if (! (value is ColumnHeader)) {
2411                                         throw new ArgumentException ("Not of type ColumnHeader", "value");
2412                                 }
2413
2414                                 this.Insert (index, (ColumnHeader) value);
2415                         }
2416
2417                         void IList.Remove (object value)
2418                         {
2419                                 if (! (value is ColumnHeader)) {
2420                                         throw new ArgumentException ("Not of type ColumnHeader", "value");
2421                                 }
2422
2423                                 this.Remove ((ColumnHeader) value);
2424                         }
2425
2426                         public int IndexOf (ColumnHeader value)
2427                         {
2428                                 return list.IndexOf (value);
2429                         }
2430
2431                         public void Insert (int index, ColumnHeader value)
2432                         {
2433                                 // LAMESPEC: MSDOCS say greater than or equal to the value of the Count property
2434                                 // but it's really only greater.
2435                                 if (index < 0 || index > list.Count)
2436                                         throw new ArgumentOutOfRangeException ("index");
2437
2438                                 value.owner = this.owner;
2439                                 list.Insert (index, value);
2440                                 owner.Redraw (true);
2441                         }
2442
2443                         public void Insert (int index, string str, int width, HorizontalAlignment textAlign)
2444                         {
2445                                 ColumnHeader colHeader = new ColumnHeader (this.owner, str, textAlign, width);
2446                                 this.Insert (index, colHeader);
2447                         }
2448
2449                         public virtual void Remove (ColumnHeader column)
2450                         {
2451                                 // TODO: Update Column internal index ?
2452                                 list.Remove (column);
2453                                 owner.Redraw (true);
2454                         }
2455
2456                         public virtual void RemoveAt (int index)
2457                         {
2458                                 if (index < 0 || index >= list.Count)
2459                                         throw new ArgumentOutOfRangeException ("index");
2460
2461                                 // TODO: Update Column internal index ?
2462                                 list.RemoveAt (index);
2463                                 owner.Redraw (true);
2464                         }
2465                         #endregion      // Public Methods
2466
2467
2468                 }       // ColumnHeaderCollection
2469
2470                 public class ListViewItemCollection : IList, ICollection, IEnumerable
2471                 {
2472                         internal ArrayList list;
2473                         private ListView owner;
2474
2475                         #region Public Constructor
2476                         public ListViewItemCollection (ListView owner)
2477                         {
2478                                 list = new ArrayList ();
2479                                 this.owner = owner;
2480                         }
2481                         #endregion      // Public Constructor
2482
2483                         #region Public Properties
2484                         [Browsable (false)]
2485                         public int Count {
2486                                 get { return list.Count; }
2487                         }
2488
2489                         public bool IsReadOnly {
2490                                 get { return false; }
2491                         }
2492
2493                         public virtual ListViewItem this [int displayIndex] {
2494                                 get {
2495                                         if (displayIndex < 0 || displayIndex >= list.Count)
2496                                                 throw new ArgumentOutOfRangeException ("displayIndex");
2497                                         return (ListViewItem) list [displayIndex];
2498                                 }
2499
2500                                 set {
2501                                         if (displayIndex < 0 || displayIndex >= list.Count)
2502                                                 throw new ArgumentOutOfRangeException ("displayIndex");
2503
2504                                         if (list.Contains (value))
2505                                                 throw new ArgumentException ("An item cannot be added more than once. To add an item again, you need to clone it.", "value");
2506
2507                                         value.Owner = owner;
2508                                         list [displayIndex] = value;
2509
2510                                         owner.Redraw (true);
2511                                 }
2512                         }
2513
2514                         bool ICollection.IsSynchronized {
2515                                 get { return true; }
2516                         }
2517
2518                         object ICollection.SyncRoot {
2519                                 get { return this; }
2520                         }
2521
2522                         bool IList.IsFixedSize {
2523                                 get { return list.IsFixedSize; }
2524                         }
2525
2526                         object IList.this [int index] {
2527                                 get { return this [index]; }
2528                                 set {
2529                                         if (value is ListViewItem)
2530                                                 this [index] = (ListViewItem) value;
2531                                         else
2532                                                 this [index] = new ListViewItem (value.ToString ());
2533                                 }
2534                         }
2535                         #endregion      // Public Properties
2536
2537                         #region Public Methods
2538                         public virtual ListViewItem Add (ListViewItem value)
2539                         {
2540                                 if (list.Contains (value))
2541                                         throw new ArgumentException ("An item cannot be added more than once. To add an item again, you need to clone it.", "value");
2542
2543                                 value.Owner = owner;
2544                                 list.Add (value);
2545
2546                                 if (owner.Sorting != SortOrder.None)
2547                                         owner.Sort ();
2548
2549                                 owner.Redraw (true);
2550
2551                                 return value;
2552                         }
2553
2554                         public virtual ListViewItem Add (string text)
2555                         {
2556                                 ListViewItem item = new ListViewItem (text);
2557                                 return this.Add (item);
2558                         }
2559
2560                         public virtual ListViewItem Add (string text, int imageIndex)
2561                         {
2562                                 ListViewItem item = new ListViewItem (text, imageIndex);
2563                                 return this.Add (item);
2564                         }
2565
2566                         public void AddRange (ListViewItem [] values)
2567                         {
2568                                 list.Clear ();
2569                                 owner.SelectedItems.list.Clear ();
2570                                 owner.SelectedIndices.list.Clear ();
2571                                 owner.CheckedItems.list.Clear ();
2572                                 owner.CheckedIndices.list.Clear ();
2573
2574                                 foreach (ListViewItem item in values) {
2575                                         item.Owner = owner;
2576                                         list.Add (item);
2577                                 }
2578
2579                                 if (owner.Sorting != SortOrder.None)
2580                                         owner.Sort ();
2581
2582                                 owner.Redraw (true);
2583                         }
2584
2585                         public virtual void Clear ()
2586                         {
2587                                 owner.SetFocusedItem (null);
2588                                 owner.h_scroll.Value = owner.v_scroll.Value = 0;
2589                                 list.Clear ();
2590                                 owner.SelectedItems.list.Clear ();
2591                                 owner.SelectedIndices.list.Clear ();
2592                                 owner.CheckedItems.list.Clear ();
2593                                 owner.CheckedIndices.list.Clear ();
2594                                 owner.Redraw (true);
2595                         }
2596
2597                         public bool Contains (ListViewItem item)
2598                         {
2599                                 return list.Contains (item);
2600                         }
2601
2602                         public void CopyTo (Array dest, int index)
2603                         {
2604                                 list.CopyTo (dest, index);
2605                         }
2606
2607                         public IEnumerator GetEnumerator ()
2608                         {
2609                                 return list.GetEnumerator ();
2610                         }
2611
2612                         int IList.Add (object item)
2613                         {
2614                                 int result;
2615                                 ListViewItem li;
2616
2617                                 if (item is ListViewItem) {
2618                                         li = (ListViewItem) item;
2619                                         if (list.Contains (li))
2620                                                 throw new ArgumentException ("An item cannot be added more than once. To add an item again, you need to clone it.", "item");
2621                                 }
2622                                 else
2623                                         li = new ListViewItem (item.ToString ());
2624
2625                                 li.Owner = owner;
2626                                 result = list.Add (li);
2627                                 owner.Redraw (true);
2628
2629                                 return result;
2630                         }
2631
2632                         bool IList.Contains (object item)
2633                         {
2634                                 return list.Contains (item);
2635                         }
2636
2637                         int IList.IndexOf (object item)
2638                         {
2639                                 return list.IndexOf (item);
2640                         }
2641
2642                         void IList.Insert (int index, object item)
2643                         {
2644                                 if (item is ListViewItem)
2645                                         this.Insert (index, (ListViewItem) item);
2646                                 else
2647                                         this.Insert (index, item.ToString ());
2648                         }
2649
2650                         void IList.Remove (object item)
2651                         {
2652                                 Remove ((ListViewItem) item);
2653                         }
2654
2655                         public int IndexOf (ListViewItem item)
2656                         {
2657                                 return list.IndexOf (item);
2658                         }
2659
2660                         public ListViewItem Insert (int index, ListViewItem item)
2661                         {
2662                                 // LAMESPEC: MSDOCS say greater than or equal to the value of the Count property
2663                                 // but it's really only greater.
2664                                 if (index < 0 || index > list.Count)
2665                                         throw new ArgumentOutOfRangeException ("index");
2666
2667                                 if (list.Contains (item))
2668                                         throw new ArgumentException ("An item cannot be added more than once. To add an item again, you need to clone it.", "item");
2669
2670                                 item.Owner = owner;
2671                                 list.Insert (index, item);
2672                                 owner.Redraw (true);
2673                                 return item;
2674                         }
2675
2676                         public ListViewItem Insert (int index, string text)
2677                         {
2678                                 return this.Insert (index, new ListViewItem (text));
2679                         }
2680
2681                         public ListViewItem Insert (int index, string text, int imageIndex)
2682                         {
2683                                 return this.Insert (index, new ListViewItem (text, imageIndex));
2684                         }
2685
2686                         public virtual void Remove (ListViewItem item)
2687                         {
2688                                 if (!list.Contains (item))
2689                                         return;
2690
2691                                 owner.SelectedItems.list.Remove (item);
2692                                 owner.SelectedIndices.list.Remove (item.Index);
2693                                 owner.CheckedItems.list.Remove (item);
2694                                 owner.CheckedIndices.list.Remove (item.Index);
2695                                 list.Remove (item);
2696                                 owner.Redraw (true);
2697                         }
2698
2699                         public virtual void RemoveAt (int index)
2700                         {
2701                                 if (index < 0 || index >= list.Count)
2702                                         throw new ArgumentOutOfRangeException ("index");
2703
2704                                 list.RemoveAt (index);
2705                                 owner.SelectedItems.list.RemoveAt (index);
2706                                 owner.SelectedIndices.list.RemoveAt (index);
2707                                 owner.CheckedItems.list.RemoveAt (index);
2708                                 owner.CheckedIndices.list.RemoveAt (index);
2709                                 owner.Redraw (false);
2710                         }
2711                         #endregion      // Public Methods
2712
2713                 }       // ListViewItemCollection
2714
2715                 public class SelectedIndexCollection : IList, ICollection, IEnumerable
2716                 {
2717                         internal ArrayList list;
2718                         private ListView owner;
2719
2720                         #region Public Constructor
2721                         public SelectedIndexCollection (ListView owner)
2722                         {
2723                                 list = new ArrayList ();
2724                                 this.owner = owner;
2725                         }
2726                         #endregion      // Public Constructor
2727
2728                         #region Public Properties
2729                         [Browsable (false)]
2730                         public int Count {
2731                                 get { return list.Count; }
2732                         }
2733
2734                         public bool IsReadOnly {
2735                                 get { return true; }
2736                         }
2737
2738                         public int this [int index] {
2739                                 get {
2740                                         if (index < 0 || index >= list.Count)
2741                                                 throw new ArgumentOutOfRangeException ("index");
2742                                         return (int) list [index];
2743                                 }
2744                         }
2745
2746                         bool ICollection.IsSynchronized {
2747                                 get { return list.IsSynchronized; }
2748                         }
2749
2750                         object ICollection.SyncRoot {
2751                                 get { return this; }
2752                         }
2753
2754                         bool IList.IsFixedSize {
2755                                 get { return true; }
2756                         }
2757
2758                         object IList.this [int index] {
2759                                 get { return this [index]; }
2760                                 set { throw new NotSupportedException ("SetItem operation is not supported."); }
2761                         }
2762                         #endregion      // Public Properties
2763
2764                         #region Public Methods
2765                         public bool Contains (int selectedIndex)
2766                         {
2767                                 return list.Contains (selectedIndex);
2768                         }
2769
2770                         public void CopyTo (Array dest, int index)
2771                         {
2772                                 list.CopyTo (dest, index);
2773                         }
2774
2775                         public IEnumerator GetEnumerator ()
2776                         {
2777                                 return list.GetEnumerator ();
2778                         }
2779
2780                         int IList.Add (object value)
2781                         {
2782                                 throw new NotSupportedException ("Add operation is not supported.");
2783                         }
2784
2785                         void IList.Clear ()
2786                         {
2787                                 throw new NotSupportedException ("Clear operation is not supported.");
2788                         }
2789
2790                         bool IList.Contains (object selectedIndex)
2791                         {
2792                                 return list.Contains (selectedIndex);
2793                         }
2794
2795                         int IList.IndexOf (object selectedIndex)
2796                         {
2797                                 return list.IndexOf (selectedIndex);
2798                         }
2799
2800                         void IList.Insert (int index, object value)
2801                         {
2802                                 throw new NotSupportedException ("Insert operation is not supported.");
2803                         }
2804
2805                         void IList.Remove (object value)
2806                         {
2807                                 throw new NotSupportedException ("Remove operation is not supported.");
2808                         }
2809
2810                         void IList.RemoveAt (int index)
2811                         {
2812                                 throw new NotSupportedException ("RemoveAt operation is not supported.");
2813                         }
2814
2815                         public int IndexOf (int selectedIndex)
2816                         {
2817                                 return list.IndexOf (selectedIndex);
2818                         }
2819                         #endregion      // Public Methods
2820
2821                 }       // SelectedIndexCollection
2822
2823                 public class SelectedListViewItemCollection : IList, ICollection, IEnumerable
2824                 {
2825                         internal ArrayList list;
2826                         private ListView owner;
2827
2828                         #region Public Constructor
2829                         public SelectedListViewItemCollection (ListView owner)
2830                         {
2831                                 list = new ArrayList ();
2832                                 this.owner = owner;
2833                         }
2834                         #endregion      // Public Constructor
2835
2836                         #region Public Properties
2837                         [Browsable (false)]
2838                         public int Count {
2839                                 get { return list.Count; }
2840                         }
2841
2842                         public bool IsReadOnly {
2843                                 get { return true; }
2844                         }
2845
2846                         public ListViewItem this [int index] {
2847                                 get {
2848                                         if (index < 0 || index >= list.Count)
2849                                                 throw new ArgumentOutOfRangeException ("index");
2850                                         return (ListViewItem) list [index];
2851                                 }
2852                         }
2853
2854                         bool ICollection.IsSynchronized {
2855                                 get { return list.IsSynchronized; }
2856                         }
2857
2858                         object ICollection.SyncRoot {
2859                                 get { return this; }
2860                         }
2861
2862                         bool IList.IsFixedSize {
2863                                 get { return true; }
2864                         }
2865
2866                         object IList.this [int index] {
2867                                 get { return this [index]; }
2868                                 set { throw new NotSupportedException ("SetItem operation is not supported."); }
2869                         }
2870                         #endregion      // Public Properties
2871
2872                         #region Public Methods
2873                         public void Clear ()
2874                         {
2875                                 ArrayList copy = (ArrayList) list.Clone ();
2876                                 for (int i = 0; i < copy.Count; i++)
2877                                         ((ListViewItem) copy [i]).Selected = false;
2878
2879                                 list.Clear ();
2880                         }
2881
2882                         public bool Contains (ListViewItem item)
2883                         {
2884                                 return list.Contains (item);
2885                         }
2886
2887                         public void CopyTo (Array dest, int index)
2888                         {
2889                                 list.CopyTo (dest, index);
2890                         }
2891
2892                         public IEnumerator GetEnumerator ()
2893                         {
2894                                 return list.GetEnumerator ();
2895                         }
2896
2897                         int IList.Add (object value)
2898                         {
2899                                 throw new NotSupportedException ("Add operation is not supported.");
2900                         }
2901
2902                         bool IList.Contains (object item)
2903                         {
2904                                 return list.Contains (item);
2905                         }
2906
2907                         int IList.IndexOf (object item)
2908                         {
2909                                 return list.IndexOf (item);
2910                         }
2911
2912                         void IList.Insert (int index, object value)
2913                         {
2914                                 throw new NotSupportedException ("Insert operation is not supported.");
2915                         }
2916
2917                         void IList.Remove (object value)
2918                         {
2919                                 throw new NotSupportedException ("Remove operation is not supported.");
2920                         }
2921
2922                         void IList.RemoveAt (int index)
2923                         {
2924                                 throw new NotSupportedException ("RemoveAt operation is not supported.");
2925                         }
2926
2927                         public int IndexOf (ListViewItem item)
2928                         {
2929                                 return list.IndexOf (item);
2930                         }
2931                         #endregion      // Public Methods
2932
2933                 }       // SelectedListViewItemCollection
2934
2935                 #endregion // Subclasses
2936         }
2937 }