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