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                                 MouseDown += new MouseEventHandler(ItemsMouseDown);
1101                                 MouseHover += new EventHandler(ItemsMouseHover);
1102                                 MouseUp += new MouseEventHandler(ItemsMouseUp);
1103                                 Paint += new PaintEventHandler (ItemsPaint);
1104                         }
1105
1106                         void ItemsDoubleClick (object sender, EventArgs e)
1107                         {
1108                                 if (owner.activation == ItemActivation.Standard && owner.ItemActivate != null)
1109                                         owner.ItemActivate (this, e);
1110                         }
1111
1112                         private void ItemsMouseDown (object sender, MouseEventArgs me)
1113                         {
1114                                 if (owner.items.Count == 0)
1115                                         return;
1116
1117                                 Point pt = new Point (me.X, me.Y);
1118                                 foreach (ListViewItem item in owner.items) {
1119                                         if (item.CheckRectReal.Contains (pt)) {
1120                                                 CheckState curr_state = item.Checked ?  CheckState.Checked : CheckState.Unchecked;
1121                                                 item.Checked = !item.Checked;
1122
1123                                                 CheckState new_state = item.Checked ?  CheckState.Checked : CheckState.Unchecked;
1124
1125                                                 // Raise the ItemCheck event
1126                                                 ItemCheckEventArgs ice = new ItemCheckEventArgs (item.Index, curr_state, new_state);
1127                                                 owner.OnItemCheck (ice);
1128                                                 break;
1129                                         }
1130
1131                                         if (owner.View == View.Details && !owner.FullRowSelect) {
1132                                                 if (item.GetBounds (ItemBoundsPortion.Label).Contains (pt)) {
1133                                                         clicked_item = item;
1134                                                         break;
1135                                                 }
1136                                         } else {
1137                                                 if (item.Bounds.Contains (pt)) {
1138                                                         clicked_item = item;
1139                                                         break;
1140                                                 }
1141                                         }
1142                                 }
1143
1144                                 owner.SetFocusedItem (clicked_item);
1145
1146                                 if (clicked_item != null) {
1147                                         bool changed = !clicked_item.Selected;
1148                                         clicked_item.Selected = true;;
1149
1150                                         if (changed)
1151                                                 owner.OnSelectedIndexChanged (EventArgs.Empty);
1152
1153                                         // Raise double click if the item was clicked. On MS the
1154                                         // double click is only raised if you double click an item
1155                                         if (me.Clicks > 1 && clicked_item != null)
1156                                                 owner.OnDoubleClick (EventArgs.Empty);
1157                                         else if (me.Clicks == 1 && clicked_item != null)
1158                                                 owner.OnClick (EventArgs.Empty);
1159                                 } else if (owner.selected_indices.Count > 0) {
1160                                         // Raise the event if there was at least one item
1161                                         // selected and the user click on a dead area (unselecting all)
1162                                         owner.SelectedItems.Clear ();
1163                                         owner.SelectedIndices.list.Clear ();
1164                                         owner.OnSelectedIndexChanged (EventArgs.Empty);
1165                                 }
1166                         }
1167
1168                         private void ItemsMouseHover (object sender, EventArgs e)
1169                         {
1170                                 if (Capture || !owner.hover_selection)
1171                                         return;
1172
1173                                 Point pt = PointToClient (Control.MousePosition);
1174                                 ListViewItem item = owner.GetItemAt (pt.X, pt.Y);
1175
1176                                 if (item == null)
1177                                         return;
1178
1179                                 item.Selected = true;
1180                                 owner.OnSelectedIndexChanged (new EventArgs ());
1181                         }
1182
1183                         private void ItemsMouseUp (object sender, MouseEventArgs me)
1184                         {
1185                                 Capture = false;
1186                                 if (owner.Items.Count == 0)
1187                                         return;
1188
1189                                 Point pt = new Point (me.X, me.Y);
1190
1191                                 Rectangle rect = Rectangle.Empty;
1192                                 if (clicked_item != null) {
1193                                         if (owner.view == View.Details && !owner.full_row_select)
1194                                                 rect = clicked_item.GetBounds (ItemBoundsPortion.Label);
1195                                         else
1196                                                 rect = clicked_item.Bounds;
1197
1198                                         if (rect.Contains (pt)) {
1199                                                 switch (owner.activation) {
1200                                                 case ItemActivation.OneClick:
1201                                                         owner.ItemActivate (this, EventArgs.Empty);
1202                                                         break;
1203
1204                                                 case ItemActivation.TwoClick:
1205                                                         if (last_clicked_item == clicked_item) {
1206                                                                 owner.ItemActivate (this, EventArgs.Empty);
1207                                                                 last_clicked_item = null;
1208                                                         } else
1209                                                                 last_clicked_item = clicked_item;
1210                                                         break;
1211                                                 default:
1212                                                         // DoubleClick activation is handled in another handler
1213                                                         break;
1214                                                 }
1215                                         }
1216                                 }
1217
1218                                 clicked_item = null;
1219                         }
1220
1221                         private void ItemsPaint (object sender, PaintEventArgs pe)
1222                         {
1223                                 ThemeEngine.Current.DrawListViewItems (pe.Graphics, pe.ClipRectangle, owner);
1224                         }
1225                 }
1226
1227                 private void ListView_Paint (object sender, PaintEventArgs pe)
1228                 {
1229                         if (Width <= 0 || Height <=  0 || !Visible || updating)
1230                                 return;
1231
1232                         CalculateScrollBars ();
1233                 }
1234
1235                 private void ListView_SizeChanged (object sender, EventArgs e)
1236                 {
1237                         CalculateListView (alignment);
1238                 }
1239
1240                 private void SetFocusedItem (ListViewItem item)
1241                 {
1242                         if (focused_item != null)
1243                                 focused_item.Focused = false;
1244
1245                         if (item != null)
1246                                 item.Focused = true;
1247
1248                         focused_item = item;
1249                 }
1250
1251                 private void HorizontalScroller (object sender, EventArgs e)
1252                 {
1253                         // Avoid unnecessary flickering, when button is
1254                         // kept pressed at the end
1255                         if (h_marker != h_scroll.Value) {
1256
1257                                 int pixels =  h_marker - h_scroll.Value;
1258
1259                                 h_marker = h_scroll.Value;
1260                                 if (header_control.Visible)
1261                                         XplatUI.ScrollWindow (header_control.Handle, pixels, 0, false);
1262
1263                                 XplatUI.ScrollWindow (item_control.Handle, pixels, 0, false);
1264                         }
1265                 }
1266
1267                 private void VerticalScroller (object sender, EventArgs e)
1268                 {
1269                         // Avoid unnecessary flickering, when button is
1270                         // kept pressed at the end
1271                         if (v_marker != v_scroll.Value) {
1272                                 int pixels =  v_marker - v_scroll.Value;
1273                                 Rectangle area = item_control.ClientRectangle;
1274                                 v_marker = v_scroll.Value;
1275                                 XplatUI.ScrollWindow (item_control.Handle, area, 0, pixels, false);
1276                         }
1277                 }
1278                 #endregion      // Internal Methods Properties
1279
1280                 #region Protected Methods
1281                 protected override void CreateHandle ()
1282                 {
1283                         base.CreateHandle ();
1284                 }
1285
1286                 protected override void Dispose (bool disposing)
1287                 {
1288                         if (disposing) {
1289                                 h_scroll.Dispose ();
1290                                 v_scroll.Dispose ();
1291
1292                                 large_image_list = null;
1293                                 small_image_list = null;
1294                                 state_image_list = null;
1295                         }
1296
1297                         base.Dispose (disposing);
1298                 }
1299
1300                 protected override bool IsInputKey (Keys keyData)
1301                 {
1302                         switch (keyData) {
1303                         case Keys.Up:
1304                         case Keys.Down:
1305                         case Keys.PageUp:
1306                         case Keys.PageDown:
1307                         case Keys.Right:
1308                         case Keys.Left:
1309                         case Keys.End:
1310                         case Keys.Home:
1311                                 return true;
1312
1313                         default:
1314                                 break;
1315                         }
1316
1317                         return base.IsInputKey (keyData);
1318                 }
1319
1320                 protected virtual void OnAfterLabelEdit (LabelEditEventArgs e)
1321                 {
1322                         if (AfterLabelEdit != null)
1323                                 AfterLabelEdit (this, e);
1324                 }
1325
1326                 protected virtual void OnBeforeLabelEdit (LabelEditEventArgs e)
1327                 {
1328                         if (BeforeLabelEdit != null)
1329                                 BeforeLabelEdit (this, e);
1330                 }
1331
1332                 protected virtual void OnColumnClick (ColumnClickEventArgs e)
1333                 {
1334                         if (ColumnClick != null)
1335                                 ColumnClick (this, e);
1336                 }
1337
1338                 protected override void OnEnabledChanged (EventArgs e)
1339                 {
1340                         base.OnEnabledChanged (e);
1341                 }
1342
1343                 protected override void OnFontChanged (EventArgs e)
1344                 {
1345                         base.OnFontChanged (e);
1346                         Redraw (true);
1347                 }
1348
1349                 protected override void OnHandleCreated (EventArgs e)
1350                 {
1351                         base.OnHandleCreated (e);
1352                         SuspendLayout ();
1353                         Controls.AddImplicit (header_control);
1354                         Controls.AddImplicit (item_control);
1355                         Controls.AddImplicit (this.v_scroll);
1356                         Controls.AddImplicit (this.h_scroll);
1357                         ResumeLayout ();
1358                 }
1359
1360                 protected override void OnHandleDestroyed (EventArgs e)
1361                 {
1362                         base.OnHandleDestroyed (e);
1363                 }
1364
1365                 protected virtual void OnItemActivate (EventArgs e)
1366                 {
1367                         if (ItemActivate != null)
1368                                 ItemActivate (this, e);
1369                 }
1370
1371                 protected virtual void OnItemCheck (ItemCheckEventArgs ice)
1372                 {
1373                         if (ItemCheck != null)
1374                                 ItemCheck (this, ice);
1375                 }
1376
1377                 protected virtual void OnItemDrag (ItemDragEventArgs e)
1378                 {
1379                         if (ItemDrag != null)
1380                                 ItemDrag (this, e);
1381                 }
1382
1383                 protected virtual void OnSelectedIndexChanged (EventArgs e)
1384                 {
1385                         if (SelectedIndexChanged != null)
1386                                 SelectedIndexChanged (this, e);
1387                 }
1388
1389                 protected override void OnSystemColorsChanged (EventArgs e)
1390                 {
1391                         base.OnSystemColorsChanged (e);
1392                 }
1393
1394                 protected void RealizeProperties ()
1395                 {
1396                         // FIXME: TODO
1397                 }
1398
1399                 protected void UpdateExtendedStyles ()
1400                 {
1401                         // FIXME: TODO
1402                 }
1403
1404                 protected override void WndProc (ref Message m)
1405                 {
1406                         base.WndProc (ref m);
1407                 }
1408                 #endregion // Protected Methods
1409
1410                 #region Public Instance Methods
1411                 public void ArrangeIcons ()
1412                 {
1413                         ArrangeIcons (this.alignment);
1414                 }
1415
1416                 public void ArrangeIcons (ListViewAlignment alignment)
1417                 {
1418                         // Icons are arranged only if view is set to LargeIcon or SmallIcon
1419                         if (view == View.LargeIcon || view == View.SmallIcon) {
1420                                 this.CalculateListView (alignment);
1421                                 // we have done the calculations already
1422                                 this.Redraw (false);
1423                         }
1424                 }
1425
1426                 public void BeginUpdate ()
1427                 {
1428                         // flag to avoid painting
1429                         updating = true;
1430                 }
1431
1432                 public void Clear ()
1433                 {
1434                         columns.Clear ();
1435                         items.Clear (); // Redraw (true) called here
1436                 }
1437
1438                 public void EndUpdate ()
1439                 {
1440                         // flag to avoid painting
1441                         updating = false;
1442
1443                         // probably, now we need a redraw with recalculations
1444                         this.Redraw (true);
1445                 }
1446
1447                 public void EnsureVisible (int index)
1448                 {
1449                         if (index < 0 || index >= items.Count || scrollable == false)
1450                                 return;
1451
1452                         Rectangle view_rect = item_control.ClientRectangle;
1453                         Rectangle bounds = items [index].Bounds;
1454
1455                         if (view_rect.Contains (bounds))
1456                                 return;
1457
1458                         if (bounds.Left < 0)
1459                                 h_scroll.Value += bounds.Left;
1460                         else if (bounds.Right > view_rect.Right)
1461                                 h_scroll.Value += (bounds.Right - view_rect.Right);
1462
1463                         if (bounds.Top < 0)
1464                                 v_scroll.Value += bounds.Top;
1465                         else if (bounds.Bottom > view_rect.Bottom)
1466                                 v_scroll.Value += (bounds.Bottom - view_rect.Bottom);
1467                 }
1468
1469                 public ListViewItem GetItemAt (int x, int y)
1470                 {
1471                         foreach (ListViewItem item in items) {
1472                                 if (item.Bounds.Contains (x, y))
1473                                         return item;
1474                         }
1475                         return null;
1476                 }
1477
1478                 public Rectangle GetItemRect (int index)
1479                 {
1480                         return GetItemRect (index, ItemBoundsPortion.Entire);
1481                 }
1482
1483                 public Rectangle GetItemRect (int index, ItemBoundsPortion portion)
1484                 {
1485                         if (index < 0 || index >= items.Count)
1486                                 throw new IndexOutOfRangeException ("Invalid Index");
1487
1488                         return items [index].GetBounds (portion);
1489                 }
1490
1491                 public void Sort ()
1492                 {
1493                         if (sort_order != SortOrder.None)
1494                                 items.list.Sort (item_sorter);
1495
1496                         if (sort_order == SortOrder.Descending)
1497                                 items.list.Reverse ();
1498
1499                         this.Redraw (true);
1500                 }
1501
1502                 public override string ToString ()
1503                 {
1504                         int count = this.Items.Count;
1505
1506                         if (count == 0)
1507                                 return string.Format ("System.Windows.Forms.ListView, Items.Count: 0");
1508                         else
1509                                 return string.Format ("System.Windows.Forms.ListView, Items.Count: {0}, Items[0]: {1}", count, this.Items [0].ToString ());
1510                 }
1511                 #endregion      // Public Instance Methods
1512
1513
1514                 #region Subclasses
1515
1516                 class HeaderControl : Control {
1517
1518                         ListView owner;
1519                         bool column_resize_active = false;
1520                         ColumnHeader resize_column;
1521                         ColumnHeader clicked_column;
1522                         ColumnHeader drag_column;
1523                         int drag_x;
1524                         int drag_to_index = -1;
1525
1526                         public HeaderControl (ListView owner)
1527                         {
1528                                 this.owner = owner;
1529                                 MouseDown += new MouseEventHandler (HeaderMouseDown);
1530                                 MouseMove += new MouseEventHandler (HeaderMouseMove);
1531                                 MouseUp += new MouseEventHandler (HeaderMouseUp);
1532                                 Paint += new PaintEventHandler (HeaderPaint);
1533                         }
1534
1535                         private ColumnHeader ColumnAtX (int x)
1536                         {
1537                                 Point pt = new Point (x, 0);
1538                                 ColumnHeader result = null;
1539                                 foreach (ColumnHeader col in owner.Columns) {
1540                                         if (col.Rect.Contains (pt)) {
1541                                                 result = col;
1542                                                 break;
1543                                         }
1544                                 }
1545                                 return result;
1546                         }
1547
1548                         private int GetReorderedIndex (ColumnHeader col)
1549                         {
1550                                 if (owner.reordered_column_indices == null)
1551                                         return col.Index;
1552                                 else
1553                                         for (int i = 0; i < owner.Columns.Count; i++)
1554                                                 if (owner.reordered_column_indices [i] == col.Index)
1555                                                         return i;
1556                                 throw new Exception ("Column index missing from reordered array");
1557                         }
1558
1559                         private void HeaderMouseDown (object sender, MouseEventArgs me)
1560                         {
1561                                 if (resize_column != null) {
1562                                         column_resize_active = true;
1563                                         Capture = true;
1564                                         return;
1565                                 }
1566
1567                                 clicked_column = ColumnAtX (me.X + owner.h_marker);
1568
1569                                 if (clicked_column != null) {
1570                                         Capture = true;
1571                                         if (owner.AllowColumnReorder) {
1572                                                 drag_x = me.X;
1573                                                 drag_column = (ColumnHeader) clicked_column.Clone ();
1574                                                 drag_column.column_rect = clicked_column.Rect;
1575                                                 drag_to_index = GetReorderedIndex (clicked_column);
1576                                         }
1577                                         clicked_column.pressed = true;
1578                                         Rectangle bounds = clicked_column.Rect;
1579                                         bounds.X -= owner.h_marker;
1580                                         Invalidate (bounds);
1581                                         return;
1582                                 }
1583                         }
1584
1585                         private void HeaderMouseMove (object sender, MouseEventArgs me)
1586                         {
1587                                 Point pt = new Point (me.X + owner.h_marker, me.Y);
1588
1589                                 if (column_resize_active)  {
1590                                         resize_column.Width = pt.X - resize_column.X;
1591                                         if (resize_column.Width < 0)
1592                                                 resize_column.Width = 0;
1593                                         return;
1594                                 }
1595
1596                                 resize_column = null;
1597
1598                                 if (clicked_column != null) {
1599                                         if (owner.AllowColumnReorder) {
1600                                                 Rectangle r;
1601
1602                                                 r = drag_column.column_rect;
1603                                                 r.X = r.X + me.X - drag_x;
1604                                                 drag_column.column_rect = r;
1605
1606                                                 int x = me.X + owner.h_marker;
1607                                                 ColumnHeader over = ColumnAtX (x);
1608                                                 if (x < over.X + over.Width / 2)
1609                                                         drag_to_index = GetReorderedIndex (over);
1610                                                 else
1611                                                         drag_to_index = GetReorderedIndex (over) + 1;
1612                                                 Invalidate ();
1613                                         } else {
1614                                                 ColumnHeader over = ColumnAtX (me.X + owner.h_marker);
1615                                                 bool pressed = clicked_column.pressed;
1616                                                 clicked_column.pressed = over == clicked_column;
1617                                                 if (clicked_column.pressed ^ pressed) {
1618                                                         Rectangle bounds = clicked_column.Rect;
1619                                                         bounds.X -= owner.h_marker;
1620                                                         Invalidate (bounds);
1621                                                 }
1622                                         }
1623                                         return;
1624                                 }
1625
1626                                 for (int i = 0; i < owner.Columns.Count; i++) {
1627                                         Rectangle zone = owner.Columns [i].Rect;
1628                                         zone.X = zone.Right - 5;
1629                                         zone.Width = 10;
1630                                         if (zone.Contains (pt)) {
1631                                                 resize_column = owner.Columns [i];
1632                                                 break;
1633                                         }
1634                                 }
1635
1636                                 if (resize_column == null)
1637                                         Cursor = Cursors.Default;
1638                                 else
1639                                         Cursor = Cursors.VSplit;
1640                         }
1641
1642                         void HeaderMouseUp (object sender, MouseEventArgs me)
1643                         {
1644                                 Capture = false;
1645
1646                                 if (column_resize_active) {
1647                                         column_resize_active = false;
1648                                         resize_column = null;
1649                                         Cursor = Cursors.Default;
1650                                         return;
1651                                 }
1652
1653                                 if (clicked_column != null && clicked_column.pressed) {
1654                                         clicked_column.pressed = false;
1655                                         Rectangle bounds = clicked_column.Rect;
1656                                         bounds.X -= owner.h_marker;
1657                                         Invalidate (bounds);
1658                                         owner.OnColumnClick (new ColumnClickEventArgs (clicked_column.Index));
1659                                 }
1660
1661                                 if (drag_column != null && owner.AllowColumnReorder) {
1662                                         drag_column = null;
1663                                         if (drag_to_index > GetReorderedIndex (clicked_column))
1664                                                 drag_to_index--;
1665                                         if (owner.GetReorderedColumn (drag_to_index) != clicked_column)
1666                                                 owner.ReorderColumn (clicked_column, drag_to_index);
1667                                         drag_to_index = -1;
1668                                         Invalidate ();
1669                                 }
1670
1671                                 clicked_column = null;
1672                         }
1673
1674                         void HeaderPaint (object sender, PaintEventArgs pe)
1675                         {
1676                                 if (Width <= 0 || Height <=  0 || !Visible || owner.updating)
1677                                         return;
1678
1679                                 Theme theme = ThemeEngine.Current;
1680                                 theme.DrawListViewHeader (pe.Graphics, pe.ClipRectangle, this.owner);
1681
1682                                 if (drag_column == null)
1683                                         return;
1684
1685                                 int target_x;
1686                                 if (drag_to_index == owner.Columns.Count)
1687                                         target_x = owner.GetReorderedColumn (drag_to_index - 1).Rect.Right - owner.h_marker;
1688                                 else
1689                                         target_x = owner.GetReorderedColumn (drag_to_index).Rect.X - owner.h_marker;
1690                                 theme.DrawListViewHeaderDragDetails (pe.Graphics, owner, drag_column, target_x);
1691                         }
1692
1693                 }
1694
1695                 public class CheckedIndexCollection : IList, ICollection, IEnumerable
1696                 {
1697                         internal ArrayList list;
1698                         private ListView owner;
1699
1700                         #region Public Constructor
1701                         public CheckedIndexCollection (ListView owner)
1702                         {
1703                                 list = new ArrayList ();
1704                                 this.owner = owner;
1705                         }
1706                         #endregion      // Public Constructor
1707
1708                         #region Public Properties
1709                         [Browsable (false)]
1710                         public virtual int Count {
1711                                 get { return list.Count; }
1712                         }
1713
1714                         public virtual bool IsReadOnly {
1715                                 get { return true; }
1716                         }
1717
1718                         public int this [int index] {
1719                                 get {
1720                                         if (index < 0 || index >= list.Count)
1721                                                 throw new ArgumentOutOfRangeException ("Index out of range.");
1722                                         return (int) list [index];
1723                                 }
1724                         }
1725
1726                         bool ICollection.IsSynchronized {
1727                                 get { return false; }
1728                         }
1729
1730                         object ICollection.SyncRoot {
1731                                 get { return this; }
1732                         }
1733
1734                         bool IList.IsFixedSize {
1735                                 get { return true; }
1736                         }
1737
1738                         object IList.this [int index] {
1739                                 get { return this [index]; }
1740                                 set { throw new NotSupportedException ("SetItem operation is not supported."); }
1741                         }
1742                         #endregion      // Public Properties
1743
1744                         #region Public Methods
1745                         public bool Contains (int checkedIndex)
1746                         {
1747                                 return list.Contains (checkedIndex);
1748                         }
1749
1750                         public virtual IEnumerator GetEnumerator ()
1751                         {
1752                                 return list.GetEnumerator ();
1753                         }
1754
1755                         void ICollection.CopyTo (Array dest, int index)
1756                         {
1757                                 list.CopyTo (dest, index);
1758                         }
1759
1760                         int IList.Add (object value)
1761                         {
1762                                 throw new NotSupportedException ("Add operation is not supported.");
1763                         }
1764
1765                         void IList.Clear ()
1766                         {
1767                                 throw new NotSupportedException ("Clear operation is not supported.");
1768                         }
1769
1770                         bool IList.Contains (object checkedIndex)
1771                         {
1772                                 return list.Contains (checkedIndex);
1773                         }
1774
1775                         int IList.IndexOf (object checkedIndex)
1776                         {
1777                                 return list.IndexOf (checkedIndex);
1778                         }
1779
1780                         void IList.Insert (int index, object value)
1781                         {
1782                                 throw new NotSupportedException ("Insert operation is not supported.");
1783                         }
1784
1785                         void IList.Remove (object value)
1786                         {
1787                                 throw new NotSupportedException ("Remove operation is not supported.");
1788                         }
1789
1790                         void IList.RemoveAt (int index)
1791                         {
1792                                 throw new NotSupportedException ("RemoveAt operation is not supported.");
1793                         }
1794
1795                         public int IndexOf (int checkedIndex)
1796                         {
1797                                 return list.IndexOf (checkedIndex);
1798                         }
1799                         #endregion      // Public Methods
1800
1801                 }       // CheckedIndexCollection
1802
1803                 public class CheckedListViewItemCollection : IList, ICollection, IEnumerable
1804                 {
1805                         internal ArrayList list;
1806                         private ListView owner;
1807
1808                         #region Public Constructor
1809                         public CheckedListViewItemCollection (ListView owner)
1810                         {
1811                                 list = new ArrayList ();
1812                                 this.owner = owner;
1813                         }
1814                         #endregion      // Public Constructor
1815
1816                         #region Public Properties
1817                         [Browsable (false)]
1818                         public virtual int Count {
1819                                 get { return list.Count; }
1820                         }
1821
1822                         public virtual bool IsReadOnly {
1823                                 get { return true; }
1824                         }
1825
1826                         public ListViewItem this [int index] {
1827                                 get {
1828                                         if (index < 0 || index >= list.Count)
1829                                                 throw new ArgumentOutOfRangeException ("Index out of range.");
1830                                         return (ListViewItem) list [index];
1831                                 }
1832                         }
1833
1834                         bool ICollection.IsSynchronized {
1835                                 get { return list.IsSynchronized; }
1836                         }
1837
1838                         object ICollection.SyncRoot {
1839                                 get { return this; }
1840                         }
1841
1842                         bool IList.IsFixedSize {
1843                                 get { return true; }
1844                         }
1845
1846                         object IList.this [int index] {
1847                                 get { return this [index]; }
1848                                 set { throw new NotSupportedException ("SetItem operation is not supported."); }
1849                         }
1850                         #endregion      // Public Properties
1851
1852                         #region Public Methods
1853                         public bool Contains (ListViewItem item)
1854                         {
1855                                 return list.Contains (item);
1856                         }
1857
1858                         public virtual void CopyTo (Array dest, int index)
1859                         {
1860                                 list.CopyTo (dest, index);
1861                         }
1862
1863                         public virtual IEnumerator GetEnumerator ()
1864                         {
1865                                 return list.GetEnumerator ();
1866                         }
1867
1868                         int IList.Add (object value)
1869                         {
1870                                 throw new NotSupportedException ("Add operation is not supported.");
1871                         }
1872
1873                         void IList.Clear ()
1874                         {
1875                                 throw new NotSupportedException ("Clear operation is not supported.");
1876                         }
1877
1878                         bool IList.Contains (object item)
1879                         {
1880                                 return list.Contains (item);
1881                         }
1882
1883                         int IList.IndexOf (object item)
1884                         {
1885                                 return list.IndexOf (item);
1886                         }
1887
1888                         void IList.Insert (int index, object value)
1889                         {
1890                                 throw new NotSupportedException ("Insert operation is not supported.");
1891                         }
1892
1893                         void IList.Remove (object value)
1894                         {
1895                                 throw new NotSupportedException ("Remove operation is not supported.");
1896                         }
1897
1898                         void IList.RemoveAt (int index)
1899                         {
1900                                 throw new NotSupportedException ("RemoveAt operation is not supported.");
1901                         }
1902
1903                         public int IndexOf (ListViewItem item)
1904                         {
1905                                 return list.IndexOf (item);
1906                         }
1907                         #endregion      // Public Methods
1908
1909                 }       // CheckedListViewItemCollection
1910
1911                 public class ColumnHeaderCollection : IList, ICollection, IEnumerable
1912                 {
1913                         internal ArrayList list;
1914                         private ListView owner;
1915
1916                         #region Public Constructor
1917                         public ColumnHeaderCollection (ListView owner)
1918                         {
1919                                 list = new ArrayList ();
1920                                 this.owner = owner;
1921                         }
1922                         #endregion      // Public Constructor
1923
1924                         #region Public Properties
1925                         [Browsable (false)]
1926                         public virtual int Count {
1927                                 get { return list.Count; }
1928                         }
1929
1930                         public virtual bool IsReadOnly {
1931                                 get { return false; }
1932                         }
1933
1934                         public virtual ColumnHeader this [int index] {
1935                                 get {
1936                                         if (index < 0 || index >= list.Count)
1937                                                 throw new ArgumentOutOfRangeException ("Index out of range.");
1938                                         return (ColumnHeader) list [index];
1939                                 }
1940                         }
1941
1942                         bool ICollection.IsSynchronized {
1943                                 get { return true; }
1944                         }
1945
1946                         object ICollection.SyncRoot {
1947                                 get { return this; }
1948                         }
1949
1950                         bool IList.IsFixedSize {
1951                                 get { return list.IsFixedSize; }
1952                         }
1953
1954                         object IList.this [int index] {
1955                                 get { return this [index]; }
1956                                 set { throw new NotSupportedException ("SetItem operation is not supported."); }
1957                         }
1958                         #endregion      // Public Properties
1959
1960                         #region Public Methods
1961                         public virtual int Add (ColumnHeader value)
1962                         {
1963                                 int idx;
1964                                 value.owner = this.owner;
1965                                 idx = list.Add (value);
1966                                 owner.Redraw (true);
1967                                 return idx;
1968                         }
1969
1970                         public virtual ColumnHeader Add (string str, int width, HorizontalAlignment textAlign)
1971                         {
1972                                 ColumnHeader colHeader = new ColumnHeader (this.owner, str, textAlign, width);
1973                                 this.Add (colHeader);
1974                                 return colHeader;
1975                         }
1976
1977                         public virtual void AddRange (ColumnHeader [] values)
1978                         {
1979                                 foreach (ColumnHeader colHeader in values) {
1980                                         colHeader.owner = this.owner;
1981                                         Add (colHeader);
1982                                 }
1983
1984                                 owner.Redraw (true);
1985                         }
1986
1987                         public virtual void Clear ()
1988                         {
1989                                 list.Clear ();
1990                                 owner.Redraw (true);
1991                         }
1992
1993                         public bool Contains (ColumnHeader value)
1994                         {
1995                                 return list.Contains (value);
1996                         }
1997
1998                         public virtual IEnumerator GetEnumerator ()
1999                         {
2000                                 return list.GetEnumerator ();
2001                         }
2002
2003                         void ICollection.CopyTo (Array dest, int index)
2004                         {
2005                                 list.CopyTo (dest, index);
2006                         }
2007
2008                         int IList.Add (object value)
2009                         {
2010                                 if (! (value is ColumnHeader)) {
2011                                         throw new ArgumentException ("Not of type ColumnHeader", "value");
2012                                 }
2013
2014                                 return this.Add ((ColumnHeader) value);
2015                         }
2016
2017                         bool IList.Contains (object value)
2018                         {
2019                                 if (! (value is ColumnHeader)) {
2020                                         throw new ArgumentException ("Not of type ColumnHeader", "value");
2021                                 }
2022
2023                                 return this.Contains ((ColumnHeader) value);
2024                         }
2025
2026                         int IList.IndexOf (object value)
2027                         {
2028                                 if (! (value is ColumnHeader)) {
2029                                         throw new ArgumentException ("Not of type ColumnHeader", "value");
2030                                 }
2031
2032                                 return this.IndexOf ((ColumnHeader) value);
2033                         }
2034
2035                         void IList.Insert (int index, object value)
2036                         {
2037                                 if (! (value is ColumnHeader)) {
2038                                         throw new ArgumentException ("Not of type ColumnHeader", "value");
2039                                 }
2040
2041                                 this.Insert (index, (ColumnHeader) value);
2042                         }
2043
2044                         void IList.Remove (object value)
2045                         {
2046                                 if (! (value is ColumnHeader)) {
2047                                         throw new ArgumentException ("Not of type ColumnHeader", "value");
2048                                 }
2049
2050                                 this.Remove ((ColumnHeader) value);
2051                         }
2052
2053                         public int IndexOf (ColumnHeader value)
2054                         {
2055                                 return list.IndexOf (value);
2056                         }
2057
2058                         public void Insert (int index, ColumnHeader value)
2059                         {
2060                                 // LAMESPEC: MSDOCS say greater than or equal to the value of the Count property
2061                                 // but it's really only greater.
2062                                 if (index < 0 || index > list.Count)
2063                                         throw new ArgumentOutOfRangeException ("Index out of range.");
2064
2065                                 value.owner = this.owner;
2066                                 list.Insert (index, value);
2067                                 owner.Redraw (true);
2068                         }
2069
2070                         public void Insert (int index, string str, int width, HorizontalAlignment textAlign)
2071                         {
2072                                 ColumnHeader colHeader = new ColumnHeader (this.owner, str, textAlign, width);
2073                                 this.Insert (index, colHeader);
2074                         }
2075
2076                         public virtual void Remove (ColumnHeader column)
2077                         {
2078                                 // TODO: Update Column internal index ?
2079                                 list.Remove (column);
2080                                 owner.Redraw (true);
2081                         }
2082
2083                         public virtual void RemoveAt (int index)
2084                         {
2085                                 if (index < 0 || index >= list.Count)
2086                                         throw new ArgumentOutOfRangeException ("Index out of range.");
2087
2088                                 // TODO: Update Column internal index ?
2089                                 list.RemoveAt (index);
2090                                 owner.Redraw (true);
2091                         }
2092                         #endregion      // Public Methods
2093
2094
2095                 }       // ColumnHeaderCollection
2096
2097                 public class ListViewItemCollection : IList, ICollection, IEnumerable
2098                 {
2099                         internal ArrayList list;
2100                         private ListView owner;
2101
2102                         #region Public Constructor
2103                         public ListViewItemCollection (ListView owner)
2104                         {
2105                                 list = new ArrayList ();
2106                                 this.owner = owner;
2107                         }
2108                         #endregion      // Public Constructor
2109
2110                         #region Public Properties
2111                         [Browsable (false)]
2112                         public virtual int Count {
2113                                 get { return list.Count; }
2114                         }
2115
2116                         public virtual bool IsReadOnly {
2117                                 get { return false; }
2118                         }
2119
2120                         public virtual ListViewItem this [int displayIndex] {
2121                                 get {
2122                                         if (displayIndex < 0 || displayIndex >= list.Count)
2123                                                 throw new ArgumentOutOfRangeException ("Index out of range.");
2124                                         return (ListViewItem) list [displayIndex];
2125                                 }
2126
2127                                 set {
2128                                         if (displayIndex < 0 || displayIndex >= list.Count)
2129                                                 throw new ArgumentOutOfRangeException ("Index out of range.");
2130
2131                                         if (list.Contains (value))
2132                                                 throw new ArgumentException ("An item cannot be added more than once. To add an item again, you need to clone it.", "value");
2133
2134                                         value.Owner = owner;
2135                                         list [displayIndex] = value;
2136
2137                                         owner.Redraw (true);
2138                                 }
2139                         }
2140
2141                         bool ICollection.IsSynchronized {
2142                                 get { return true; }
2143                         }
2144
2145                         object ICollection.SyncRoot {
2146                                 get { return this; }
2147                         }
2148
2149                         bool IList.IsFixedSize {
2150                                 get { return list.IsFixedSize; }
2151                         }
2152
2153                         object IList.this [int index] {
2154                                 get { return this [index]; }
2155                                 set {
2156                                         if (value is ListViewItem)
2157                                                 this [index] = (ListViewItem) value;
2158                                         else
2159                                                 this [index] = new ListViewItem (value.ToString ());
2160                                 }
2161                         }
2162                         #endregion      // Public Properties
2163
2164                         #region Public Methods
2165                         public virtual ListViewItem Add (ListViewItem value)
2166                         {
2167                                 if (list.Contains (value))
2168                                         throw new ArgumentException ("An item cannot be added more than once. To add an item again, you need to clone it.", "value");
2169
2170                                 value.Owner = owner;
2171                                 list.Add (value);
2172
2173                                 if (owner.Sorting != SortOrder.None)
2174                                         owner.Sort ();
2175
2176                                 owner.Redraw (true);
2177
2178                                 return value;
2179                         }
2180
2181                         public virtual ListViewItem Add (string text)
2182                         {
2183                                 ListViewItem item = new ListViewItem (text);
2184                                 return this.Add (item);
2185                         }
2186
2187                         public virtual ListViewItem Add (string text, int imageIndex)
2188                         {
2189                                 ListViewItem item = new ListViewItem (text, imageIndex);
2190                                 return this.Add (item);
2191                         }
2192
2193                         public void AddRange (ListViewItem [] values)
2194                         {
2195                                 list.Clear ();
2196                                 owner.SelectedItems.list.Clear ();
2197                                 owner.SelectedIndices.list.Clear ();
2198                                 owner.CheckedItems.list.Clear ();
2199                                 owner.CheckedIndices.list.Clear ();
2200
2201                                 foreach (ListViewItem item in values) {
2202                                         item.Owner = owner;
2203                                         list.Add (item);
2204                                 }
2205
2206                                 if (owner.Sorting != SortOrder.None)
2207                                         owner.Sort ();
2208
2209                                 owner.Redraw (true);
2210                         }
2211
2212                         public virtual void Clear ()
2213                         {
2214                                 owner.SetFocusedItem (null);
2215                                 owner.h_scroll.Value = owner.v_scroll.Value = 0;
2216                                 list.Clear ();
2217                                 owner.SelectedItems.list.Clear ();
2218                                 owner.SelectedIndices.list.Clear ();
2219                                 owner.CheckedItems.list.Clear ();
2220                                 owner.CheckedIndices.list.Clear ();
2221                                 owner.Redraw (true);
2222                         }
2223
2224                         public bool Contains (ListViewItem item)
2225                         {
2226                                 return list.Contains (item);
2227                         }
2228
2229                         public virtual void CopyTo (Array dest, int index)
2230                         {
2231                                 list.CopyTo (dest, index);
2232                         }
2233
2234                         public virtual IEnumerator GetEnumerator ()
2235                         {
2236                                 return list.GetEnumerator ();
2237                         }
2238
2239                         int IList.Add (object item)
2240                         {
2241                                 int result;
2242                                 ListViewItem li;
2243
2244                                 if (item is ListViewItem) {
2245                                         li = (ListViewItem) item;
2246                                         if (list.Contains (li))
2247                                                 throw new ArgumentException ("An item cannot be added more than once. To add an item again, you need to clone it.", "item");
2248                                 }
2249                                 else
2250                                         li = new ListViewItem (item.ToString ());
2251
2252                                 li.Owner = owner;
2253                                 result = list.Add (li);
2254                                 owner.Redraw (true);
2255
2256                                 return result;
2257                         }
2258
2259                         bool IList.Contains (object item)
2260                         {
2261                                 return list.Contains (item);
2262                         }
2263
2264                         int IList.IndexOf (object item)
2265                         {
2266                                 return list.IndexOf (item);
2267                         }
2268
2269                         void IList.Insert (int index, object item)
2270                         {
2271                                 if (item is ListViewItem)
2272                                         this.Insert (index, (ListViewItem) item);
2273                                 else
2274                                         this.Insert (index, item.ToString ());
2275                         }
2276
2277                         void IList.Remove (object item)
2278                         {
2279                                 Remove ((ListViewItem) item);
2280                         }
2281
2282                         public int IndexOf (ListViewItem item)
2283                         {
2284                                 return list.IndexOf (item);
2285                         }
2286
2287                         public ListViewItem Insert (int index, ListViewItem item)
2288                         {
2289                                 // LAMESPEC: MSDOCS say greater than or equal to the value of the Count property
2290                                 // but it's really only greater.
2291                                 if (index < 0 || index > list.Count)
2292                                         throw new ArgumentOutOfRangeException ("Index out of range.");
2293
2294                                 if (list.Contains (item))
2295                                         throw new ArgumentException ("An item cannot be added more than once. To add an item again, you need to clone it.", "item");
2296
2297                                 item.Owner = owner;
2298                                 list.Insert (index, item);
2299                                 owner.Redraw (true);
2300                                 return item;
2301                         }
2302
2303                         public ListViewItem Insert (int index, string text)
2304                         {
2305                                 return this.Insert (index, new ListViewItem (text));
2306                         }
2307
2308                         public ListViewItem Insert (int index, string text, int imageIndex)
2309                         {
2310                                 return this.Insert (index, new ListViewItem (text, imageIndex));
2311                         }
2312
2313                         public virtual void Remove (ListViewItem item)
2314                         {
2315                                 if (!list.Contains (item))
2316                                         return;
2317
2318                                 owner.SelectedItems.list.Remove (item);
2319                                 owner.SelectedIndices.list.Remove (item.Index);
2320                                 owner.CheckedItems.list.Remove (item);
2321                                 owner.CheckedIndices.list.Remove (item.Index);
2322                                 list.Remove (item);
2323                                 owner.Redraw (true);
2324                         }
2325
2326                         public virtual void RemoveAt (int index)
2327                         {
2328                                 if (index < 0 || index >= list.Count)
2329                                         throw new ArgumentOutOfRangeException ("Index out of range.");
2330
2331                                 list.RemoveAt (index);
2332                                 owner.SelectedItems.list.RemoveAt (index);
2333                                 owner.SelectedIndices.list.RemoveAt (index);
2334                                 owner.CheckedItems.list.RemoveAt (index);
2335                                 owner.CheckedIndices.list.RemoveAt (index);
2336                                 owner.Redraw (false);
2337                         }
2338                         #endregion      // Public Methods
2339
2340                 }       // ListViewItemCollection
2341
2342                 public class SelectedIndexCollection : IList, ICollection, IEnumerable
2343                 {
2344                         internal ArrayList list;
2345                         private ListView owner;
2346
2347                         #region Public Constructor
2348                         public SelectedIndexCollection (ListView owner)
2349                         {
2350                                 list = new ArrayList ();
2351                                 this.owner = owner;
2352                         }
2353                         #endregion      // Public Constructor
2354
2355                         #region Public Properties
2356                         [Browsable (false)]
2357                         public virtual int Count {
2358                                 get { return list.Count; }
2359                         }
2360
2361                         public virtual bool IsReadOnly {
2362                                 get { return true; }
2363                         }
2364
2365                         public int this [int index] {
2366                                 get {
2367                                         if (index < 0 || index >= list.Count)
2368                                                 throw new ArgumentOutOfRangeException ("Index out of range.");
2369                                         return (int) list [index];
2370                                 }
2371                         }
2372
2373                         bool ICollection.IsSynchronized {
2374                                 get { return list.IsSynchronized; }
2375                         }
2376
2377                         object ICollection.SyncRoot {
2378                                 get { return this; }
2379                         }
2380
2381                         bool IList.IsFixedSize {
2382                                 get { return true; }
2383                         }
2384
2385                         object IList.this [int index] {
2386                                 get { return this [index]; }
2387                                 set { throw new NotSupportedException ("SetItem operation is not supported."); }
2388                         }
2389                         #endregion      // Public Properties
2390
2391                         #region Public Methods
2392                         public bool Contains (int selectedIndex)
2393                         {
2394                                 return list.Contains (selectedIndex);
2395                         }
2396
2397                         public virtual void CopyTo (Array dest, int index)
2398                         {
2399                                 list.CopyTo (dest, index);
2400                         }
2401
2402                         public virtual IEnumerator GetEnumerator ()
2403                         {
2404                                 return list.GetEnumerator ();
2405                         }
2406
2407                         int IList.Add (object value)
2408                         {
2409                                 throw new NotSupportedException ("Add operation is not supported.");
2410                         }
2411
2412                         void IList.Clear ()
2413                         {
2414                                 throw new NotSupportedException ("Clear operation is not supported.");
2415                         }
2416
2417                         bool IList.Contains (object selectedIndex)
2418                         {
2419                                 return list.Contains (selectedIndex);
2420                         }
2421
2422                         int IList.IndexOf (object selectedIndex)
2423                         {
2424                                 return list.IndexOf (selectedIndex);
2425                         }
2426
2427                         void IList.Insert (int index, object value)
2428                         {
2429                                 throw new NotSupportedException ("Insert operation is not supported.");
2430                         }
2431
2432                         void IList.Remove (object value)
2433                         {
2434                                 throw new NotSupportedException ("Remove operation is not supported.");
2435                         }
2436
2437                         void IList.RemoveAt (int index)
2438                         {
2439                                 throw new NotSupportedException ("RemoveAt operation is not supported.");
2440                         }
2441
2442                         public int IndexOf (int selectedIndex)
2443                         {
2444                                 return list.IndexOf (selectedIndex);
2445                         }
2446                         #endregion      // Public Methods
2447
2448                 }       // SelectedIndexCollection
2449
2450                 public class SelectedListViewItemCollection : IList, ICollection, IEnumerable
2451                 {
2452                         internal ArrayList list;
2453                         private ListView owner;
2454
2455                         #region Public Constructor
2456                         public SelectedListViewItemCollection (ListView owner)
2457                         {
2458                                 list = new ArrayList ();
2459                                 this.owner = owner;
2460                         }
2461                         #endregion      // Public Constructor
2462
2463                         #region Public Properties
2464                         [Browsable (false)]
2465                         public virtual int Count {
2466                                 get { return list.Count; }
2467                         }
2468
2469                         public virtual bool IsReadOnly {
2470                                 get { return true; }
2471                         }
2472
2473                         public ListViewItem this [int index] {
2474                                 get {
2475                                         if (index < 0 || index >= list.Count)
2476                                                 throw new ArgumentOutOfRangeException ("Index out of range.");
2477                                         return (ListViewItem) list [index];
2478                                 }
2479                         }
2480
2481                         bool ICollection.IsSynchronized {
2482                                 get { return list.IsSynchronized; }
2483                         }
2484
2485                         object ICollection.SyncRoot {
2486                                 get { return this; }
2487                         }
2488
2489                         bool IList.IsFixedSize {
2490                                 get { return true; }
2491                         }
2492
2493                         object IList.this [int index] {
2494                                 get { return this [index]; }
2495                                 set { throw new NotSupportedException ("SetItem operation is not supported."); }
2496                         }
2497                         #endregion      // Public Properties
2498
2499                         #region Public Methods
2500                         public virtual void Clear ()
2501                         {
2502                                 for (int i = 0; i < list.Count; i++)
2503                                         ((ListViewItem) list [i]).Selected = false;
2504
2505                                 list.Clear ();
2506                         }
2507
2508                         public bool Contains (ListViewItem item)
2509                         {
2510                                 return list.Contains (item);
2511                         }
2512
2513                         public virtual void CopyTo (Array dest, int index)
2514                         {
2515                                 list.CopyTo (dest, index);
2516                         }
2517
2518                         public virtual IEnumerator GetEnumerator ()
2519                         {
2520                                 return list.GetEnumerator ();
2521                         }
2522
2523                         int IList.Add (object value)
2524                         {
2525                                 throw new NotSupportedException ("Add operation is not supported.");
2526                         }
2527
2528                         bool IList.Contains (object item)
2529                         {
2530                                 return list.Contains (item);
2531                         }
2532
2533                         int IList.IndexOf (object item)
2534                         {
2535                                 return list.IndexOf (item);
2536                         }
2537
2538                         void IList.Insert (int index, object value)
2539                         {
2540                                 throw new NotSupportedException ("Insert operation is not supported.");
2541                         }
2542
2543                         void IList.Remove (object value)
2544                         {
2545                                 throw new NotSupportedException ("Remove operation is not supported.");
2546                         }
2547
2548                         void IList.RemoveAt (int index)
2549                         {
2550                                 throw new NotSupportedException ("RemoveAt operation is not supported.");
2551                         }
2552
2553                         public int IndexOf (ListViewItem item)
2554                         {
2555                                 return list.IndexOf (item);
2556                         }
2557                         #endregion      // Public Methods
2558
2559                 }       // SelectedListViewItemCollection
2560
2561                 #endregion // Subclasses
2562         }
2563 }