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