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