mcs/class/Managed.Windows.Forms/System.Windows.Forms/ListView.cs

   1 // Permission is hereby granted, free of charge, to any person obtaining
   2 // a copy of this software and associated documentation files (the
   3 // "Software"), to deal in the Software without restriction, including
   4 // without limitation the rights to use, copy, modify, merge, publish,
   5 // distribute, sublicense, and/or sell copies of the Software, and to
   6 // permit persons to whom the Software is furnished to do so, subject to
   7 // the following conditions:
   8 //
   9 // The above copyright notice and this permission notice shall be
  10 // included in all copies or substantial portions of the Software.
  11 //
  12 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  13 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  14 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  15 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  16 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  17 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  18 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  19 //
  20 // Copyright (c) 2004-2005 Novell, Inc. (http://www.novell.com)
  21 //
  22 // Authors:
  23 //      Ravindra Kumar (rkumar@novell.com)
  24 //      Jordi Mas i Hernandez, jordi@ximian.com
  25 //      Mike Kestner (mkestner@novell.com)
  26 //
  27 // TODO:
  28 //   - Feedback for item activation, change in cursor types as mouse moves.
  29 //   - HideSelection
  30 //   - LabelEdit
  31 //   - Drag and drop
  32
  33
  34 // NOT COMPLETE
  35
  36
  37 using System.Collections;
  38 using System.ComponentModel;
  39 using System.ComponentModel.Design;
  40 using System.Drawing;
  41 using System.Runtime.InteropServices;
  42 using System.Globalization;
  43
  44 namespace System.Windows.Forms
  45 {
  46         [DefaultEvent ("SelectedIndexChanged")]
  47         [DefaultProperty ("Items")]
  48         [Designer ("System.Windows.Forms.Design.ListViewDesigner, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.IDesigner")]
  49         public class ListView : Control
  50         {
  51                 private ItemActivation activation = ItemActivation.Standard;
  52                 private ListViewAlignment alignment = ListViewAlignment.Top;
  53                 private bool allow_column_reorder = false;
  54                 private bool auto_arrange = true;
  55                 private bool check_boxes = false;
  56                 private CheckedIndexCollection checked_indices;
  57                 private CheckedListViewItemCollection checked_items;
  58                 private ColumnHeaderCollection columns;
  59                 internal ListViewItem focused_item;
  60                 private bool full_row_select = false;
  61                 private bool grid_lines = false;
  62                 private ColumnHeaderStyle header_style = ColumnHeaderStyle.Clickable;
  63                 private bool hide_selection = true;
  64                 private bool hover_selection = false;
  65                 private IComparer item_sorter;
  66                 private ListViewItemCollection items;
  67                 private bool label_edit = false;
  68                 private bool label_wrap = true;
  69                 private bool multiselect = true;
  70                 private bool scrollable = true;
  71                 private SelectedIndexCollection selected_indices;
  72                 private SelectedListViewItemCollection selected_items;
  73                 private SortOrder sort_order = SortOrder.None;
  74                 private ImageList state_image_list;
  75                 private bool updating = false;
  76                 private View view = View.LargeIcon;
  77                 private int layout_wd;    // We might draw more than our client area
  78                 private int layout_ht;    // therefore we need to have these two.
  79                 //private TextBox editor;   // Used for editing an item text
  80                 HeaderControl header_control;
  81                 internal ItemControl item_control;
  82                 internal ScrollBar h_scroll; // used for scrolling horizontally
  83                 internal ScrollBar v_scroll; // used for scrolling vertically
  84                 internal int h_marker;          // Position markers for scrolling
  85                 internal int v_marker;
  86                 private int keysearch_tickcnt;
  87                 private string keysearch_text;
  88                 static private readonly int keysearch_keydelay = 1000;
  89                 private int[] reordered_column_indices;
  90
  91                 // internal variables
  92                 internal ImageList large_image_list;
  93                 internal ImageList small_image_list;
  94                 internal Size text_size = Size.Empty;
  95
  96                 #region Events
  97                 public event LabelEditEventHandler AfterLabelEdit;
  98
  99                 [Browsable (false)]
 100                 [EditorBrowsable (EditorBrowsableState.Never)]
 101                 public new event EventHandler BackgroundImageChanged {
 102                         add { base.BackgroundImageChanged += value; }
 103                         remove { base.BackgroundImageChanged -= value; }
 104                 }
 105
 106                 public event LabelEditEventHandler BeforeLabelEdit;
 107                 public event ColumnClickEventHandler ColumnClick;
 108                 public event EventHandler ItemActivate;
 109                 public event ItemCheckEventHandler ItemCheck;
 110                 public event ItemDragEventHandler ItemDrag;
 111
 112                 [Browsable (false)]
 113                 [EditorBrowsable (EditorBrowsableState.Never)]
 114                 public new event PaintEventHandler Paint {
 115                         add { base.Paint += value; }
 116                         remove { base.Paint -= value; }
 117                 }
 118
 119                 public event EventHandler SelectedIndexChanged;
 120
 121                 [Browsable (false)]
 122                 [EditorBrowsable (EditorBrowsableState.Never)]
 123                 public new event EventHandler TextChanged {
 124                         add { base.TextChanged += value; }
 125                         remove { base.TextChanged -= value; }
 126                 }
 127
 128                 #endregion // Events
 129
 130                 #region Public Constructors
 131                 public ListView ()
 132                 {
 133                         background_color = ThemeEngine.Current.ColorWindow;
 134                         checked_indices = new CheckedIndexCollection (this);
 135                         checked_items = new CheckedListViewItemCollection (this);
 136                         columns = new ColumnHeaderCollection (this);
 137                         foreground_color = SystemColors.WindowText;
 138                         items = new ListViewItemCollection (this);
 139                         selected_indices = new SelectedIndexCollection (this);
 140                         selected_items = new SelectedListViewItemCollection (this);
 141
 142                         border_style = BorderStyle.Fixed3D;
 143
 144                         header_control = new HeaderControl (this);
 145                         header_control.Visible = false;
 146                         item_control = new ItemControl (this);
 147                         item_control.Visible = true;
 148
 149                         h_scroll = new HScrollBar ();
 150                         v_scroll = new VScrollBar ();
 151                         h_marker = v_marker = 0;
 152                         keysearch_tickcnt = 0;
 153
 154                         // scroll bars are disabled initially
 155                         h_scroll.Visible = false;
 156                         h_scroll.ValueChanged += new EventHandler(HorizontalScroller);
 157                         v_scroll.Visible = false;
 158                         v_scroll.ValueChanged += new EventHandler(VerticalScroller);
 159
 160                         // event handlers
 161                         base.KeyDown += new KeyEventHandler(ListView_KeyDown);
 162                         base.Paint += new PaintEventHandler (ListView_Paint);
 163                         SizeChanged += new EventHandler (ListView_SizeChanged);
 164
 165                         this.SetStyle (ControlStyles.UserPaint | ControlStyles.StandardClick, false);
 166                 }
 167                 #endregion      // Public Constructors
 168
 169                 #region Private Internal Properties
 170                 internal Size CheckBoxSize {
 171                         get {
 172                                 if (this.check_boxes) {
 173                                         if (this.state_image_list != null)
 174                                                 return this.state_image_list.ImageSize;
 175                                         else
 176                                                 return ThemeEngine.Current.ListViewCheckBoxSize;
 177                                 }
 178                                 return Size.Empty;
 179                         }
 180                 }
 181
 182                 internal bool CanMultiselect {
 183                         get {
 184                                 if (multiselect && (XplatUI.State.ModifierKeys & (Keys.Control | Keys.Shift)) != 0)
 185                                         return true;
 186                                 else
 187                                         return false;
 188                         }
 189                 }
 190
 191                 #endregion      // Private Internal Properties
 192
 193                 #region  Protected Properties
 194                 protected override CreateParams CreateParams {
 195                         get { return base.CreateParams; }
 196                 }
 197
 198                 protected override Size DefaultSize {
 199                         get { return ThemeEngine.Current.ListViewDefaultSize; }
 200                 }
 201                 #endregion      // Protected Properties
 202
 203                 #region Public Instance Properties
 204                 [DefaultValue (ItemActivation.Standard)]
 205                 public ItemActivation Activation {
 206                         get { return activation; }
 207                         set {
 208                                 if (value != ItemActivation.Standard && value != ItemActivation.OneClick &&
 209                                         value != ItemActivation.TwoClick) {
 210                                         throw new InvalidEnumArgumentException (string.Format
 211                                                 ("Enum argument value '{0}' is not valid for Activation", value));
 212                                 }
 213
 214                                 activation = value;
 215                         }
 216                 }
 217
 218                 [DefaultValue (ListViewAlignment.Top)]
 219                 [Localizable (true)]
 220                 public ListViewAlignment Alignment {
 221                         get { return alignment; }
 222                         set {
 223                                 if (value != ListViewAlignment.Default && value != ListViewAlignment.Left &&
 224                                         value != ListViewAlignment.SnapToGrid && value != ListViewAlignment.Top) {
 225                                         throw new InvalidEnumArgumentException (string.Format
 226                                                 ("Enum argument value '{0}' is not valid for Alignment", value));
 227                                 }
 228
 229                                 if (this.alignment != value) {
 230                                         alignment = value;
 231                                         // alignment does not matter in Details/List views
 232                                         if (this.view == View.LargeIcon ||
 233                                             this.View == View.SmallIcon)
 234                                                 this.Redraw (true);
 235                                 }
 236                         }
 237                 }
 238
 239                 [DefaultValue (false)]
 240                 public bool AllowColumnReorder {
 241                         get { return allow_column_reorder; }
 242                         set { allow_column_reorder = value; }
 243                 }
 244
 245                 [DefaultValue (true)]
 246                 public bool AutoArrange {
 247                         get { return auto_arrange; }
 248                         set {
 249                                 if (auto_arrange != value) {
 250                                         auto_arrange = value;
 251                                         // autoarrange does not matter in Details/List views
 252                                         if (this.view == View.LargeIcon || this.View == View.SmallIcon)
 253                                                 this.Redraw (true);
 254                                 }
 255                         }
 256                 }
 257
 258                 public override Color BackColor {
 259                         get {
 260                                 if (background_color.IsEmpty)
 261                                         return ThemeEngine.Current.ColorWindow;
 262                                 else
 263                                         return background_color;
 264                         }
 265                         set { background_color = value; }
 266                 }
 267
 268                 [Browsable (false)]
 269                 [EditorBrowsable (EditorBrowsableState.Never)]
 270                 public override Image BackgroundImage {
 271                         get { return background_image; }
 272                         set {
 273                                 if (value == background_image)
 274                                         return;
 275
 276                                 background_image = value;
 277                                 OnBackgroundImageChanged (EventArgs.Empty);
 278                         }
 279                 }
 280
 281                 [DefaultValue (BorderStyle.Fixed3D)]
 282                 [DispId (-504)]
 283                 public BorderStyle BorderStyle {
 284                         get { return InternalBorderStyle; }
 285                         set { InternalBorderStyle = value; }
 286                 }
 287
 288                 [DefaultValue (false)]
 289                 public bool CheckBoxes {
 290                         get { return check_boxes; }
 291                         set {
 292                                 if (check_boxes != value) {
 293                                         check_boxes = value;
 294                                         this.Redraw (true);
 295                                 }
 296                         }
 297                 }
 298
 299                 [Browsable (false)]
 300                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 301                 public CheckedIndexCollection CheckedIndices {
 302                         get { return checked_indices; }
 303                 }
 304
 305                 [Browsable (false)]
 306                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 307                 public CheckedListViewItemCollection CheckedItems {
 308                         get { return checked_items; }
 309                 }
 310
 311                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
 312                 [Localizable (true)]
 313                 [MergableProperty (false)]
 314                 public ColumnHeaderCollection Columns {
 315                         get { return columns; }
 316                 }
 317
 318                 [Browsable (false)]
 319                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 320                 public ListViewItem FocusedItem {
 321                         get {
 322                                 if (focused_item == null && Focused && items.Count > 0)
 323                                         focused_item = items [0];
 324                                 return focused_item;
 325                         }
 326                 }
 327
 328                 public override Color ForeColor {
 329                         get {
 330                                 if (foreground_color.IsEmpty)
 331                                         return ThemeEngine.Current.ColorWindowText;
 332                                 else
 333                                         return foreground_color;
 334                         }
 335                         set { foreground_color = value; }
 336                 }
 337
 338                 [DefaultValue (false)]
 339                 public bool FullRowSelect {
 340                         get { return full_row_select; }
 341                         set { full_row_select = value; }
 342                 }
 343
 344                 [DefaultValue (false)]
 345                 public bool GridLines {
 346                         get { return grid_lines; }
 347                         set {
 348                                 if (grid_lines != value) {
 349                                         grid_lines = value;
 350                                         this.Redraw (false);
 351                                 }
 352                         }
 353                 }
 354
 355                 [DefaultValue (ColumnHeaderStyle.Clickable)]
 356                 public ColumnHeaderStyle HeaderStyle {
 357                         get { return header_style; }
 358                         set {
 359                                 if (header_style == value)
 360                                         return;
 361
 362                                 switch (value) {
 363                                 case ColumnHeaderStyle.Clickable:
 364                                 case ColumnHeaderStyle.Nonclickable:
 365                                 case ColumnHeaderStyle.None:
 366                                         break;
 367                                 default:
 368                                         throw new InvalidEnumArgumentException (string.Format
 369                                                 ("Enum argument value '{0}' is not valid for ColumnHeaderStyle", value));
 370                                 }
 371
 372                                 header_style = value;
 373                                 if (view == View.Details)
 374                                         Redraw (true);
 375                         }
 376                 }
 377
 378                 [DefaultValue (true)]
 379                 public bool HideSelection {
 380                         get { return hide_selection; }
 381                         set {
 382                                 if (hide_selection != value) {
 383                                         hide_selection = value;
 384                                         this.Redraw (false);
 385                                 }
 386                         }
 387                 }
 388
 389                 [DefaultValue (false)]
 390                 public bool HoverSelection {
 391                         get { return hover_selection; }
 392                         set { hover_selection = value; }
 393                 }
 394
 395                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
 396                 [Localizable (true)]
 397                 [MergableProperty (false)]
 398                 public ListViewItemCollection Items {
 399                         get { return items; }
 400                 }
 401
 402                 [DefaultValue (false)]
 403                 public bool LabelEdit {
 404                         get { return label_edit; }
 405                         set { label_edit = value; }
 406                 }
 407
 408                 [DefaultValue (true)]
 409                 [Localizable (true)]
 410                 public bool LabelWrap {
 411                         get { return label_wrap; }
 412                         set {
 413                                 if (label_wrap != value) {
 414                                         label_wrap = value;
 415                                         this.Redraw (true);
 416                                 }
 417                         }
 418                 }
 419
 420                 [DefaultValue (null)]
 421                 public ImageList LargeImageList {
 422                         get { return large_image_list; }
 423                         set {
 424                                 large_image_list = value;
 425                                 this.Redraw (true);
 426                         }
 427                 }
 428
 429                 [Browsable (false)]
 430                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 431                 public IComparer ListViewItemSorter {
 432                         get { return item_sorter; }
 433                         set { item_sorter = value; }
 434                 }
 435
 436                 [DefaultValue (true)]
 437                 public bool MultiSelect {
 438                         get { return multiselect; }
 439                         set { multiselect = value; }
 440                 }
 441
 442                 [DefaultValue (true)]
 443                 public bool Scrollable {
 444                         get { return scrollable; }
 445                         set {
 446                                 if (scrollable != value) {
 447                                         scrollable = value;
 448                                         this.Redraw (true);
 449                                 }
 450                         }
 451                 }
 452
 453                 [Browsable (false)]
 454                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 455                 public SelectedIndexCollection SelectedIndices {
 456                         get { return selected_indices; }
 457                 }
 458
 459                 [Browsable (false)]
 460                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 461                 public SelectedListViewItemCollection SelectedItems {
 462                         get { return selected_items; }
 463                 }
 464
 465                 [DefaultValue (null)]
 466                 public ImageList SmallImageList {
 467                         get { return small_image_list; }
 468                         set {
 469                                 small_image_list = value;
 470                                 this.Redraw (true);
 471                         }
 472                 }
 473
 474                 [DefaultValue (SortOrder.None)]
 475                 public SortOrder Sorting {
 476                         get { return sort_order; }
 477                         set {
 478                                 if (value != SortOrder.Ascending && value != SortOrder.Descending  &&
 479                                         value != SortOrder.None) {
 480                                         throw new InvalidEnumArgumentException (string.Format
 481                                                 ("Enum argument value '{0}' is not valid for Sorting", value));
 482                                 }
 483
 484                                 if (sort_order != value)  {
 485                                         sort_order = value;
 486                                         this.Redraw (false);
 487                                 }
 488                         }
 489                 }
 490
 491                 [DefaultValue (null)]
 492                 public ImageList StateImageList {
 493                         get { return state_image_list; }
 494                         set {
 495                                 state_image_list = value;
 496                                 this.Redraw (true);
 497                         }
 498                 }
 499
 500                 [Bindable (false)]
 501                 [Browsable (false)]
 502                 [EditorBrowsable (EditorBrowsableState.Never)]
 503                 public override string Text {
 504                         get { return text; }
 505                         set {
 506                                 if (value == text)
 507                                         return;
 508
 509                                 text = value;
 510                                 this.Redraw (true);
 511
 512                                 OnTextChanged (EventArgs.Empty);
 513                         }
 514                 }
 515
 516                 [Browsable (false)]
 517                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 518                 public ListViewItem TopItem {
 519                         get {
 520                                 // there is no item
 521                                 if (this.items.Count == 0)
 522                                         return null;
 523                                 // if contents are not scrolled
 524                                 // it is the first item
 525                                 else if (h_marker == 0 && v_marker == 0)
 526                                         return this.items [0];
 527                                 // do a hit test for the scrolled position
 528                                 else {
 529                                         foreach (ListViewItem item in this.items) {
 530                                                 if (item.Bounds.X >= 0 && item.Bounds.Y >= 0)
 531                                                         return item;
 532                                         }
 533                                         return null;
 534                                 }
 535                         }
 536                 }
 537
 538                 [DefaultValue (View.LargeIcon)]
 539                 public View View {
 540                         get { return view; }
 541                         set {
 542                                 if (value != View.Details && value != View.LargeIcon  &&
 543                                         value != View.List  && value != View.SmallIcon  ) {
 544                                         throw new InvalidEnumArgumentException (string.Format
 545                                                 ("Enum argument value '{0}' is not valid for View", value));
 546                                 }
 547
 548                                 if (view != value) {
 549                                         h_scroll.Value = v_scroll.Value = 0;
 550                                         view = value;
 551                                         Redraw (true);
 552                                 }
 553                         }
 554                 }
 555                 #endregion      // Public Instance Properties
 556
 557                 #region Internal Methods Properties
 558
 559                 internal int FirstVisibleIndex {
 560                         get {
 561                                 // there is no item
 562                                 if (this.items.Count == 0)
 563                                         return 0;
 564
 565                                 if (h_marker == 0 && v_marker == 0)
 566                                         return 0;
 567
 568                                 foreach (ListViewItem item in this.items) {
 569                                         if (item.Bounds.Right >= 0 && item.Bounds.Bottom >= 0)
 570                                                 return item.Index;
 571                                 }
 572                                 return 0;
 573
 574                         }
 575                 }
 576
 577
 578                 internal int LastVisibleIndex {
 579                         get {
 580                                 for (int i = FirstVisibleIndex; i < Items.Count; i++) {
 581                                         if (Items[i].Bounds.Y > ClientRectangle.Bottom)
 582                                                         return i -1;
 583                                 }
 584
 585                                 return Items.Count - 1;
 586                         }
 587                 }
 588
 589                 internal int TotalWidth {
 590                         get { return Math.Max (this.Width, this.layout_wd); }
 591                 }
 592
 593                 internal int TotalHeight {
 594                         get { return Math.Max (this.Height, this.layout_ht); }
 595                 }
 596
 597                 internal void Redraw (bool recalculate)
 598                 {
 599                         // Avoid calculations when control is being updated
 600                         if (this.updating)
 601                                 return;
 602
 603                         if (recalculate)
 604                                 CalculateListView (this.alignment);
 605
 606                         Refresh ();
 607                 }
 608
 609                 internal Size GetChildColumnSize (int index)
 610                 {
 611                         Size ret_size = Size.Empty;
 612                         ColumnHeader col = this.columns [index];
 613
 614                         if (col.Width == -2) { // autosize = max(items, columnheader)
 615                                 Size size = Size.Ceiling (this.DeviceContext.MeasureString
 616                                                           (col.Text, this.Font));
 617                                 ret_size = BiggestItem (index);
 618                                 if (size.Width > ret_size.Width)
 619                                         ret_size = size;
 620                         }
 621                         else { // -1 and all the values < -2 are put under one category
 622                                 ret_size = BiggestItem (index);
 623                                 // fall back to empty columns' width if no subitem is available for a column
 624                                 if (ret_size.IsEmpty) {
 625                                         ret_size.Width = ThemeEngine.Current.ListViewEmptyColumnWidth;
 626                                         if (col.Text.Length > 0)
 627                                                 ret_size.Height = Size.Ceiling (this.DeviceContext.MeasureString
 628                                                                                 (col.Text, this.Font)).Height;
 629                                         else
 630                                                 ret_size.Height = this.Font.Height;
 631                                 }
 632                         }
 633
 634                         // adjust the size for icon and checkbox for 0th column
 635                         if (index == 0) {
 636                                 ret_size.Width += (this.CheckBoxSize.Width + 4);
 637                                 if (this.small_image_list != null)
 638                                         ret_size.Width += this.small_image_list.ImageSize.Width;
 639                         }
 640                         return ret_size;
 641                 }
 642
 643                 // Returns the size of biggest item text in a column.
 644                 private Size BiggestItem (int col)
 645                 {
 646                         Size temp = Size.Empty;
 647                         Size ret_size = Size.Empty;
 648
 649                         // 0th column holds the item text, we check the size of
 650                         // the various subitems falling in that column and get
 651                         // the biggest one's size.
 652                         foreach (ListViewItem item in items) {
 653                                 if (col >= item.SubItems.Count)
 654                                         continue;
 655
 656                                 temp = Size.Ceiling (this.DeviceContext.MeasureString
 657                                                      (item.SubItems [col].Text, this.Font));
 658                                 if (temp.Width > ret_size.Width)
 659                                         ret_size = temp;
 660                         }
 661
 662                         // adjustment for space
 663                         if (!ret_size.IsEmpty)
 664                                 ret_size.Width += 4;
 665
 666                         return ret_size;
 667                 }
 668
 669                 // Sets the size of the biggest item text as per the view
 670                 private void CalcTextSize ()
 671                 {
 672                         // clear the old value
 673                         text_size = Size.Empty;
 674
 675                         if (items.Count == 0)
 676                                 return;
 677
 678                         text_size = BiggestItem (0);
 679
 680                         if (view == View.LargeIcon && this.label_wrap) {
 681                                 Size temp = Size.Empty;
 682                                 if (this.check_boxes)
 683                                         temp.Width += 2 * this.CheckBoxSize.Width;
 684                                 if (large_image_list != null)
 685                                         temp.Width += large_image_list.ImageSize.Width;
 686                                 if (temp.Width == 0)
 687                                         temp.Width = 43;
 688                                 // wrapping is done for two lines only
 689                                 if (text_size.Width > temp.Width) {
 690                                         text_size.Width = temp.Width;
 691                                         text_size.Height *= 2;
 692                                 }
 693                         }
 694                         else if (view == View.List) {
 695                                 // in list view max text shown in determined by the
 696                                 // control width, even if scolling is enabled.
 697                                 int max_wd = this.Width - (this.CheckBoxSize.Width - 2);
 698                                 if (this.small_image_list != null)
 699                                         max_wd -= this.small_image_list.ImageSize.Width;
 700
 701                                 if (text_size.Width > max_wd)
 702                                         text_size.Width = max_wd;
 703                         }
 704
 705                         // we do the default settings, if we have got 0's
 706                         if (text_size.Height <= 0)
 707                                 text_size.Height = this.Font.Height;
 708                         if (text_size.Width <= 0)
 709                                 text_size.Width = this.Width;
 710
 711                         // little adjustment
 712                         text_size.Width += 4;
 713                         text_size.Height += 2;
 714                 }
 715
 716                 private void Scroll (ScrollBar scrollbar, int delta)
 717                 {
 718                         if (delta == 0 || !scrollbar.Visible)
 719                                 return;
 720
 721                         int max;
 722                         if (scrollbar == h_scroll)
 723                                 max = h_scroll.Maximum - item_control.Width;
 724                         else
 725                                 max = v_scroll.Maximum - item_control.Height;
 726
 727                         int val = scrollbar.Value + delta;
 728                         if (val > max)
 729                                 val = max;
 730                         else if (val < scrollbar.Minimum)
 731                                 val = scrollbar.Minimum;
 732                         scrollbar.Value = val;
 733                 }
 734
 735                 private void CalculateScrollBars ()
 736                 {
 737                         Rectangle client_area = ClientRectangle;
 738
 739                         if (!this.scrollable || this.items.Count <= 0) {
 740                                 h_scroll.Visible = false;
 741                                 v_scroll.Visible = false;
 742                                 return;
 743                         }
 744
 745                         // making a scroll bar visible might make
 746                         // other scroll bar visible
 747                         if (layout_wd > client_area.Right) {
 748                                 h_scroll.Visible = true;
 749                                 if ((layout_ht + h_scroll.Height) > client_area.Bottom)
 750                                         v_scroll.Visible = true;
 751                                 else
 752                                         v_scroll.Visible = false;
 753                         } else if (layout_ht > client_area.Bottom) {
 754                                 v_scroll.Visible = true;
 755                                 if ((layout_wd + v_scroll.Width) > client_area.Right)
 756                                         h_scroll.Visible = true;
 757                                 else
 758                                         h_scroll.Visible = false;
 759                         } else {
 760                                 h_scroll.Visible = false;
 761                                 v_scroll.Visible = false;
 762                         }
 763
 764                         item_control.Height = ClientRectangle.Height - header_control.Height;
 765
 766                         if (h_scroll.Visible) {
 767                                 h_scroll.Location = new Point (client_area.X, client_area.Bottom - h_scroll.Height);
 768                                 h_scroll.Minimum = 0;
 769
 770                                 // if v_scroll is visible, adjust the maximum of the
 771                                 // h_scroll to account for the width of v_scroll
 772                                 if (v_scroll.Visible) {
 773                                         h_scroll.Maximum = layout_wd + v_scroll.Width;
 774                                         h_scroll.Width = client_area.Width - v_scroll.Width;
 775                                 }
 776                                 else {
 777                                         h_scroll.Maximum = layout_wd;
 778                                         h_scroll.Width = client_area.Width;
 779                                 }
 780
 781                                 h_scroll.LargeChange = client_area.Width;
 782                                 h_scroll.SmallChange = Font.Height;
 783                                 item_control.Height -= h_scroll.Height;
 784                         }
 785
 786                         if (header_control.Visible)
 787                                 header_control.Width = ClientRectangle.Width;
 788                         item_control.Width = ClientRectangle.Width;
 789
 790                         if (v_scroll.Visible) {
 791                                 v_scroll.Location = new Point (client_area.Right - v_scroll.Width, client_area.Y);
 792                                 v_scroll.Minimum = 0;
 793
 794                                 // if h_scroll is visible, adjust the maximum of the
 795                                 // v_scroll to account for the height of h_scroll
 796                                 if (h_scroll.Visible) {
 797                                         v_scroll.Maximum = layout_ht + h_scroll.Height;
 798                                         v_scroll.Height = client_area.Height; // - h_scroll.Height already done
 799                                 } else {
 800                                         v_scroll.Maximum = layout_ht;
 801                                         v_scroll.Height = client_area.Height;
 802                                 }
 803
 804                                 v_scroll.LargeChange = client_area.Height;
 805                                 v_scroll.SmallChange = Font.Height;
 806                                 if (header_control.Visible)
 807                                         header_control.Width -= v_scroll.Width;
 808                                 item_control.Width -= v_scroll.Width;
 809                         }
 810                 }
 811
 812                 ColumnHeader GetReorderedColumn (int index)
 813                 {
 814                         if (reordered_column_indices == null)
 815                                 return Columns [index];
 816                         else
 817                                 return Columns [reordered_column_indices [index]];
 818                 }
 819
 820                 void ReorderColumn (ColumnHeader col, int index)
 821                 {
 822                         if (reordered_column_indices == null) {
 823                                 reordered_column_indices = new int [Columns.Count];
 824                                 for (int i = 0; i < Columns.Count; i++)
 825                                         reordered_column_indices [i] = i;
 826                         }
 827
 828                         if (reordered_column_indices [index] == col.Index)
 829                                 return;
 830
 831                         int[] curr = reordered_column_indices;
 832                         int[] result = new int [Columns.Count];
 833                         int curr_idx = 0;
 834                         for (int i = 0; i < Columns.Count; i++) {
 835                                 if (curr_idx < Columns.Count && curr [curr_idx] == col.Index)
 836                                         curr_idx++;
 837
 838                                 if (i == index)
 839                                         result [i] = col.Index;
 840                                 else
 841                                         result [i] = curr [curr_idx++];
 842                         }
 843
 844                         reordered_column_indices = result;
 845                         LayoutDetails ();
 846                         header_control.Invalidate ();
 847                         item_control.Invalidate ();
 848                 }
 849
 850                 Size LargeIconItemSize {
 851                         get {
 852                                 int w = Math.Max (text_size.Width, 2 + CheckBoxSize.Width + LargeImageList.ImageSize.Width);
 853                                 int h = text_size.Height + 2 + Math.Max (CheckBoxSize.Height, LargeImageList.ImageSize.Height);
 854                                 return new Size (w, h);
 855                         }
 856                 }
 857
 858                 Size SmallIconItemSize {
 859                         get {
 860                                 int w = text_size.Width + 2 + CheckBoxSize.Width + SmallImageList.ImageSize.Width;
 861                                 int h = Math.Max (text_size.Height, Math.Max (CheckBoxSize.Height, SmallImageList.ImageSize.Height));
 862                                 return new Size (w, h);
 863                         }
 864                 }
 865
 866                 int rows;
 867                 int cols;
 868                 ListViewItem[,] item_matrix;
 869
 870                 void LayoutIcons (bool large_icons, bool left_aligned, int x_spacing, int y_spacing)
 871                 {
 872                         header_control.Visible = false;
 873                         header_control.Size = Size.Empty;
 874                         item_control.Location = Point.Empty;
 875
 876                         if (items.Count == 0)
 877                                 return;
 878
 879                         Size sz = large_icons ? LargeIconItemSize : SmallIconItemSize;
 880
 881                         Rectangle area = ClientRectangle;
 882
 883                         if (left_aligned) {
 884                                 rows = (int) Math.Floor ((double)area.Height / (double)(sz.Height + y_spacing));
 885                                 if (rows == 0)
 886                                         rows = 1;
 887                                 cols = (int) Math.Ceiling ((double)items.Count / (double)rows);
 888                         } else {
 889                                 cols = (int) Math.Floor ((double)area.Width / (double)(sz.Width + x_spacing));
 890                                 if (cols == 0)
 891                                         cols = 1;
 892                                 rows = (int) Math.Ceiling ((double)items.Count / (double)cols);
 893                         }
 894
 895                         layout_ht = rows * (sz.Height + y_spacing) - y_spacing;
 896                         layout_wd = cols * (sz.Width + x_spacing) - x_spacing;
 897                         item_matrix = new ListViewItem [rows, cols];
 898                         int row = 0;
 899                         int col = 0;
 900                         foreach (ListViewItem item in items) {
 901                                 int x = col * (sz.Width + x_spacing);
 902                                 int y = row * (sz.Height + y_spacing);
 903                                 item.Location = new Point (x, y);
 904                                 item.Layout ();
 905                                 item.row = row;
 906                                 item.col = col;
 907                                 item_matrix [row, col] = item;
 908                                 if (left_aligned) {
 909                                         if (++row == rows) {
 910                                                 row = 0;
 911                                                 col++;
 912                                         }
 913                                 } else {
 914                                         if (++col == cols) {
 915                                                 col = 0;
 916                                                 row++;
 917                                         }
 918                                 }
 919                         }
 920
 921                         item_control.Size = new Size (layout_wd, layout_ht);
 922                 }
 923
 924                 void LayoutHeader ()
 925                 {
 926                         if (columns.Count == 0 || header_style == ColumnHeaderStyle.None) {
 927                                 header_control.Visible = false;
 928                                 header_control.Size = Size.Empty;
 929                                 return;
 930                         }
 931
 932                         int x = 0;
 933                         for (int i = 0; i < Columns.Count; i++) {
 934                                 ColumnHeader col = GetReorderedColumn (i);
 935                                 col.X = x;
 936                                 col.Y = 0;
 937                                 col.CalcColumnHeader ();
 938                                 x += col.Wd;
 939                         }
 940
 941                         header_control.Width = x;
 942                         header_control.Height = columns [0].Ht;
 943                         header_control.Visible = true;
 944                 }
 945
 946                 void LayoutDetails ()
 947                 {
 948                         LayoutHeader ();
 949
 950                         item_control.Location = new Point (0, header_control.Height);
 951
 952                         int y = 0;
 953                         if (items.Count > 0) {
 954                                 foreach (ListViewItem item in items) {
 955                                         item.Layout ();
 956                                         item.Location = new Point (0, y);
 957                                         y += item.Bounds.Height + 2;
 958                                 }
 959
 960                                 // some space for bottom gridline
 961                                 if (grid_lines)
 962                                         y += 2;
 963                         }
 964
 965                         layout_wd = Math.Max (header_control.Width, item_control.Width);
 966                         layout_ht = y + header_control.Height;
 967                 }
 968
 969                 private void CalculateListView (ListViewAlignment align)
 970                 {
 971                         CalcTextSize ();
 972
 973                         switch (view) {
 974                         case View.Details:
 975                                 LayoutDetails ();
 976                                 break;
 977
 978                         case View.SmallIcon:
 979                                 LayoutIcons (false, alignment == ListViewAlignment.Left, 4, 2);
 980                                 break;
 981
 982                         case View.LargeIcon:
 983                                 LayoutIcons (true, alignment == ListViewAlignment.Left,
 984                                              ThemeEngine.Current.ListViewHorizontalSpacing,
 985                                              ThemeEngine.Current.ListViewVerticalSpacing);
 986                                 break;
 987
 988                         case View.List:
 989                                 LayoutIcons (false, true, 4, 2);
 990                                 break;
 991                         }
 992
 993                         CalculateScrollBars ();
 994                 }
 995
 996                 internal void UpdateSelection (ListViewItem item)
 997                 {
 998                         if (item.Selected) {
 999
1000                                 if (!CanMultiselect && SelectedItems.Count > 0) {
1001                                         SelectedItems.Clear ();
1002                                         SelectedIndices.list.Clear ();
1003                                 }
1004
1005                                 if (!SelectedItems.Contains (item)) {
1006                                         SelectedItems.list.Add (item);
1007                                         SelectedIndices.list.Add (item.Index);
1008                                 }
1009                         } else {
1010                                 SelectedItems.list.Remove (item);
1011                                 SelectedIndices.list.Remove (item.Index);
1012                         }
1013                 }
1014
1015                 private bool KeySearchString (KeyEventArgs ke)
1016                 {
1017                         int current_tickcnt = Environment.TickCount;
1018                         if (keysearch_tickcnt > 0 && current_tickcnt - keysearch_tickcnt > keysearch_keydelay) {
1019                                 keysearch_text = string.Empty;
1020                         }
1021
1022                         keysearch_text += (char) ke.KeyData;
1023                         keysearch_tickcnt = current_tickcnt;
1024
1025                         int start = FocusedItem == null ? 0 : FocusedItem.Index;
1026                         int i = start;
1027                         while (true) {
1028                                 if (CultureInfo.CurrentCulture.CompareInfo.IsPrefix (Items[i].Text, keysearch_text,
1029                                         CompareOptions.IgnoreCase)) {
1030                                         SetFocusedItem (Items [i]);
1031                                         items [i].Selected = true;
1032                                         EnsureVisible (i);
1033                                         break;
1034                                 }
1035                                 i = (i + 1  < Items.Count) ? i+1 : 0;
1036
1037                                 if (i == start)
1038                                         break;
1039                         }
1040                         return true;
1041                 }
1042
1043                 int GetAdjustedIndex (Keys key)
1044                 {
1045                         int result = -1;
1046
1047                         if (View == View.Details) {
1048                                 if (key == Keys.Up)
1049                                         result = FocusedItem.Index - 1;
1050                                 else if (key == Keys.Down) {
1051                                         result = FocusedItem.Index + 1;
1052                                         if (result == items.Count)
1053                                                 result = -1;
1054                                 }
1055                                 return result;
1056                         }
1057
1058                         int row = FocusedItem.row;
1059                         int col = FocusedItem.col;
1060
1061                         switch (key) {
1062                         case Keys.Left:
1063                                 if (col == 0)
1064                                         return -1;
1065                                 return item_matrix [row, col - 1].Index;
1066
1067                         case Keys.Right:
1068                                 if (col == (cols - 1))
1069                                         return -1;
1070                                 while (item_matrix [row, col + 1] == null)
1071                                        row--;
1072                                 return item_matrix [row, col + 1].Index;
1073
1074                         case Keys.Up:
1075                                 if (row == 0)
1076                                         return -1;
1077                                 return item_matrix [row - 1, col].Index;
1078
1079                         case Keys.Down:
1080                                 if (row == (rows - 1))
1081                                         return -1;
1082                                 while (item_matrix [row + 1, col] == null)
1083                                        col--;
1084                                 return item_matrix [row + 1, col].Index;
1085
1086                         default:
1087                                 return -1;
1088                         }
1089                 }
1090
1091                 ListViewItem selection_start;
1092
1093                 private void SelectItems (ArrayList sel_items)
1094                 {
1095                         SelectedItems.Clear ();
1096                         SelectedIndices.list.Clear ();
1097                         foreach (ListViewItem item in sel_items)
1098                                 item.Selected = true;
1099                 }
1100
1101                 private void UpdateMultiSelection (int index)
1102                 {
1103                         bool shift_pressed = (XplatUI.State.ModifierKeys & Keys.Shift) != 0;
1104                         bool ctrl_pressed = (XplatUI.State.ModifierKeys & Keys.Control) != 0;
1105                         ListViewItem item = items [index];
1106
1107                         if (shift_pressed && selection_start != null) {
1108                                 ArrayList list = new ArrayList ();
1109                                 int start = Math.Min (selection_start.Index, index);
1110                                 int end = Math.Max (selection_start.Index, index);
1111                                 if (View == View.Details) {
1112                                         for (int i = start; i <= end; i++)
1113                                                 list.Add (items [i]);
1114                                 } else {
1115                                         int left = Math.Min (items [start].col, items [end].col);
1116                                         int right = Math.Max (items [start].col, items [end].col);
1117                                         int top = Math.Min (items [start].row, items [end].row);
1118                                         int bottom = Math.Max (items [start].row, items [end].row);
1119                                         foreach (ListViewItem curr in items)
1120                                                 if (curr.row >= top && curr.row <= bottom &&
1121                                                     curr.col >= left && curr.col <= right)
1122                                                         list.Add (curr);
1123                                 }
1124                                 SelectItems (list);
1125                         } else if (!ctrl_pressed) {
1126                                 SelectedItems.Clear ();
1127                                 SelectedIndices.list.Clear ();
1128                                 item.Selected = true;
1129                                 selection_start = item;
1130                         }
1131                 }
1132
1133                 private void ListView_KeyDown (object sender, KeyEventArgs ke)
1134                 {
1135                         if (ke.Handled || Items.Count == 0)
1136                                 return;
1137
1138                         int index = -1;
1139                         ke.Handled = true;
1140
1141                         switch (ke.KeyCode) {
1142
1143                         case Keys.End:
1144                                 index = Items.Count - 1;
1145                                 break;
1146
1147                         case Keys.Home:
1148                                 index = 0;
1149                                 break;
1150
1151                         case Keys.Left:
1152                         case Keys.Right:
1153                         case Keys.Up:
1154                         case Keys.Down:
1155                                 index = GetAdjustedIndex (ke.KeyCode);
1156                                 break;
1157
1158                         default:
1159                                 ke.Handled = KeySearchString (ke);
1160                                 return;
1161                         }
1162
1163                         if (index == -1)
1164                                 return;
1165
1166                         if (MultiSelect)
1167                                 UpdateMultiSelection (index);
1168                         else
1169                                 items [index].Selected = true;
1170
1171                         SetFocusedItem (items [index]);
1172                         EnsureVisible (index);
1173                 }
1174
1175
1176                 internal class ItemControl : Control {
1177
1178                         ListView owner;
1179                         ListViewItem clicked_item;
1180                         ListViewItem last_clicked_item;
1181                         bool hover_processed = false;
1182
1183                         public ItemControl (ListView owner)
1184                         {
1185                                 this.owner = owner;
1186                                 DoubleClick += new EventHandler(ItemsDoubleClick);
1187                                 KeyDown += new KeyEventHandler (ItemsKeyDown);
1188                                 KeyUp += new KeyEventHandler (ItemsKeyUp);
1189                                 MouseDown += new MouseEventHandler(ItemsMouseDown);
1190                                 MouseMove += new MouseEventHandler(ItemsMouseMove);
1191                                 MouseHover += new EventHandler(ItemsMouseHover);
1192                                 MouseUp += new MouseEventHandler(ItemsMouseUp);
1193                                 MouseWheel += new MouseEventHandler(ItemsMouseWheel);
1194                                 Paint += new PaintEventHandler (ItemsPaint);
1195                         }
1196
1197                         void ItemsDoubleClick (object sender, EventArgs e)
1198                         {
1199                                 if (owner.activation == ItemActivation.Standard && owner.ItemActivate != null)
1200                                         owner.ItemActivate (this, e);
1201                         }
1202
1203                         void ItemsKeyDown (object sender, KeyEventArgs args)
1204                         {
1205                                 owner.OnKeyDown (args);
1206                         }
1207
1208                         void ItemsKeyUp (object sender, KeyEventArgs args)
1209                         {
1210                                 owner.OnKeyUp (args);
1211                         }
1212
1213                         private void ItemsMouseDown (object sender, MouseEventArgs me)
1214                         {
1215                                 if (owner.items.Count == 0)
1216                                         return;
1217
1218                                 Point pt = new Point (me.X, me.Y);
1219                                 foreach (ListViewItem item in owner.items) {
1220                                         if (item.CheckRectReal.Contains (pt)) {
1221                                                 CheckState curr_state = item.Checked ?  CheckState.Checked : CheckState.Unchecked;
1222                                                 item.Checked = !item.Checked;
1223
1224                                                 CheckState new_state = item.Checked ?  CheckState.Checked : CheckState.Unchecked;
1225
1226                                                 // Raise the ItemCheck event
1227                                                 ItemCheckEventArgs ice = new ItemCheckEventArgs (item.Index, curr_state, new_state);
1228                                                 owner.OnItemCheck (ice);
1229                                                 break;
1230                                         }
1231
1232                                         if (owner.View == View.Details && !owner.FullRowSelect) {
1233                                                 if (item.GetBounds (ItemBoundsPortion.Label).Contains (pt)) {
1234                                                         clicked_item = item;
1235                                                         break;
1236                                                 }
1237                                         } else {
1238                                                 if (item.Bounds.Contains (pt)) {
1239                                                         clicked_item = item;
1240                                                         break;
1241                                                 }
1242                                         }
1243                                 }
1244
1245                                 owner.SetFocusedItem (clicked_item);
1246
1247                                 if (clicked_item != null) {
1248                                         bool changed = !clicked_item.Selected;
1249                                         if (owner.MultiSelect && (XplatUI.State.ModifierKeys & Keys.Control) == 0)
1250                                                 owner.UpdateMultiSelection (clicked_item.Index);
1251                                         else
1252                                                 clicked_item.Selected = true;
1253
1254                                         if (changed)
1255                                                 owner.OnSelectedIndexChanged (EventArgs.Empty);
1256
1257                                         // Raise double click if the item was clicked. On MS the
1258                                         // double click is only raised if you double click an item
1259                                         if (me.Clicks > 1 && clicked_item != null)
1260                                                 owner.OnDoubleClick (EventArgs.Empty);
1261                                         else if (me.Clicks == 1 && clicked_item != null)
1262                                                 owner.OnClick (EventArgs.Empty);
1263                                 } else if (owner.selected_indices.Count > 0) {
1264                                         // Raise the event if there was at least one item
1265                                         // selected and the user click on a dead area (unselecting all)
1266                                         owner.SelectedItems.Clear ();
1267                                         owner.SelectedIndices.list.Clear ();
1268                                         owner.OnSelectedIndexChanged (EventArgs.Empty);
1269                                 }
1270                         }
1271
1272                         private void ItemsMouseMove (object sender, MouseEventArgs me)
1273                         {
1274                                 if (owner.HoverSelection && hover_processed) {
1275
1276                                         Point pt = PointToClient (Control.MousePosition);
1277                                         ListViewItem item = owner.GetItemAt (pt.X, pt.Y);
1278                                         if (item == null || item.Selected)
1279                                                 return;
1280
1281                                         hover_processed = false;
1282                                         XplatUI.ResetMouseHover (Handle);
1283                                 }
1284                         }
1285
1286
1287                         private void ItemsMouseHover (object sender, EventArgs e)
1288                         {
1289                                 if (Capture || !owner.HoverSelection)
1290                                         return;
1291
1292                                 hover_processed = true;
1293                                 Point pt = PointToClient (Control.MousePosition);
1294                                 ListViewItem item = owner.GetItemAt (pt.X, pt.Y);
1295
1296                                 if (item == null)
1297                                         return;
1298
1299                                 item.Selected = true;
1300                                 owner.OnSelectedIndexChanged (new EventArgs ());
1301                         }
1302
1303                         private void ItemsMouseUp (object sender, MouseEventArgs me)
1304                         {
1305                                 Capture = false;
1306                                 if (owner.Items.Count == 0)
1307                                         return;
1308
1309                                 Point pt = new Point (me.X, me.Y);
1310
1311                                 Rectangle rect = Rectangle.Empty;
1312                                 if (clicked_item != null) {
1313                                         if (owner.view == View.Details && !owner.full_row_select)
1314                                                 rect = clicked_item.GetBounds (ItemBoundsPortion.Label);
1315                                         else
1316                                                 rect = clicked_item.Bounds;
1317
1318                                         if (rect.Contains (pt)) {
1319                                                 switch (owner.activation) {
1320                                                 case ItemActivation.OneClick:
1321                                                         owner.OnItemActivate (EventArgs.Empty);
1322                                                         break;
1323
1324                                                 case ItemActivation.TwoClick:
1325                                                         if (last_clicked_item == clicked_item) {
1326                                                                 owner.OnItemActivate (EventArgs.Empty);
1327                                                                 last_clicked_item = null;
1328                                                         } else
1329                                                                 last_clicked_item = clicked_item;
1330                                                         break;
1331                                                 default:
1332                                                         // DoubleClick activation is handled in another handler
1333                                                         break;
1334                                                 }
1335                                         }
1336                                 }
1337
1338                                 clicked_item = null;
1339                         }
1340
1341                         private void ItemsMouseWheel (object sender, MouseEventArgs me)
1342                         {
1343                                 if (owner.Items.Count == 0)
1344                                         return;
1345
1346                                 int lines = me.Delta / 120;
1347
1348                                 if (lines == 0)
1349                                         return;
1350
1351                                 switch (owner.View) {
1352                                 case View.Details:
1353                                 case View.SmallIcon:
1354                                         owner.Scroll (owner.v_scroll, -owner.Items [0].Bounds.Height * SystemInformation.MouseWheelScrollLines * lines);
1355                                         break;
1356                                 case View.LargeIcon:
1357                                         owner.Scroll (owner.v_scroll, -(owner.Items [0].Bounds.Height + ThemeEngine.Current.ListViewVerticalSpacing)  * lines);
1358                                         break;
1359                                 case View.List:
1360                                         owner.Scroll (owner.h_scroll, -owner.Items [0].Bounds.Width * lines);
1361                                         break;
1362                                 }
1363                         }
1364
1365                         private void ItemsPaint (object sender, PaintEventArgs pe)
1366                         {
1367                                 ThemeEngine.Current.DrawListViewItems (pe.Graphics, pe.ClipRectangle, owner);
1368                         }
1369                 }
1370
1371                 private void ListView_Paint (object sender, PaintEventArgs pe)
1372                 {
1373                         if (Width <= 0 || Height <=  0 || !Visible || updating)
1374                                 return;
1375
1376                         CalculateScrollBars ();
1377                 }
1378
1379                 private void ListView_SizeChanged (object sender, EventArgs e)
1380                 {
1381                         CalculateListView (alignment);
1382                 }
1383
1384                 private void SetFocusedItem (ListViewItem item)
1385                 {
1386                         if (focused_item != null)
1387                                 focused_item.Focused = false;
1388
1389                         if (item != null)
1390                                 item.Focused = true;
1391
1392                         focused_item = item;
1393                 }
1394
1395                 private void HorizontalScroller (object sender, EventArgs e)
1396                 {
1397                         // Avoid unnecessary flickering, when button is
1398                         // kept pressed at the end
1399                         if (h_marker != h_scroll.Value) {
1400
1401                                 int pixels =  h_marker - h_scroll.Value;
1402
1403                                 h_marker = h_scroll.Value;
1404                                 if (header_control.Visible)
1405                                         XplatUI.ScrollWindow (header_control.Handle, pixels, 0, false);
1406
1407                                 XplatUI.ScrollWindow (item_control.Handle, pixels, 0, false);
1408                         }
1409                 }
1410
1411                 private void VerticalScroller (object sender, EventArgs e)
1412                 {
1413                         // Avoid unnecessary flickering, when button is
1414                         // kept pressed at the end
1415                         if (v_marker != v_scroll.Value) {
1416                                 int pixels =  v_marker - v_scroll.Value;
1417                                 Rectangle area = item_control.ClientRectangle;
1418                                 v_marker = v_scroll.Value;
1419                                 XplatUI.ScrollWindow (item_control.Handle, area, 0, pixels, false);
1420                         }
1421                 }
1422                 #endregion      // Internal Methods Properties
1423
1424                 #region Protected Methods
1425                 protected override void CreateHandle ()
1426                 {
1427                         base.CreateHandle ();
1428                 }
1429
1430                 protected override void Dispose (bool disposing)
1431                 {
1432                         if (disposing) {
1433                                 h_scroll.Dispose ();
1434                                 v_scroll.Dispose ();
1435
1436                                 large_image_list = null;
1437                                 small_image_list = null;
1438                                 state_image_list = null;
1439                         }
1440
1441                         base.Dispose (disposing);
1442                 }
1443
1444                 protected override bool IsInputKey (Keys keyData)
1445                 {
1446                         switch (keyData) {
1447                         case Keys.Up:
1448                         case Keys.Down:
1449                         case Keys.PageUp:
1450                         case Keys.PageDown:
1451                         case Keys.Right:
1452                         case Keys.Left:
1453                         case Keys.End:
1454                         case Keys.Home:
1455                                 return true;
1456
1457                         default:
1458                                 break;
1459                         }
1460
1461                         return base.IsInputKey (keyData);
1462                 }
1463
1464                 protected virtual void OnAfterLabelEdit (LabelEditEventArgs e)
1465                 {
1466                         if (AfterLabelEdit != null)
1467                                 AfterLabelEdit (this, e);
1468                 }
1469
1470                 protected virtual void OnBeforeLabelEdit (LabelEditEventArgs e)
1471                 {
1472                         if (BeforeLabelEdit != null)
1473                                 BeforeLabelEdit (this, e);
1474                 }
1475
1476                 protected virtual void OnColumnClick (ColumnClickEventArgs e)
1477                 {
1478                         if (ColumnClick != null)
1479                                 ColumnClick (this, e);
1480                 }
1481
1482                 protected override void OnEnabledChanged (EventArgs e)
1483                 {
1484                         base.OnEnabledChanged (e);
1485                 }
1486
1487                 protected override void OnFontChanged (EventArgs e)
1488                 {
1489                         base.OnFontChanged (e);
1490                         Redraw (true);
1491                 }
1492
1493                 protected override void OnHandleCreated (EventArgs e)
1494                 {
1495                         base.OnHandleCreated (e);
1496                         SuspendLayout ();
1497                         Controls.AddImplicit (header_control);
1498                         Controls.AddImplicit (item_control);
1499                         Controls.AddImplicit (this.v_scroll);
1500                         Controls.AddImplicit (this.h_scroll);
1501                         ResumeLayout ();
1502                 }
1503
1504                 protected override void OnHandleDestroyed (EventArgs e)
1505                 {
1506                         base.OnHandleDestroyed (e);
1507                 }
1508
1509                 protected virtual void OnItemActivate (EventArgs e)
1510                 {
1511                         if (ItemActivate != null)
1512                                 ItemActivate (this, e);
1513                 }
1514
1515                 protected virtual void OnItemCheck (ItemCheckEventArgs ice)
1516                 {
1517                         if (ItemCheck != null)
1518                                 ItemCheck (this, ice);
1519                 }
1520
1521                 protected virtual void OnItemDrag (ItemDragEventArgs e)
1522                 {
1523                         if (ItemDrag != null)
1524                                 ItemDrag (this, e);
1525                 }
1526
1527                 protected virtual void OnSelectedIndexChanged (EventArgs e)
1528                 {
1529                         if (SelectedIndexChanged != null)
1530                                 SelectedIndexChanged (this, e);
1531                 }
1532
1533                 protected override void OnSystemColorsChanged (EventArgs e)
1534                 {
1535                         base.OnSystemColorsChanged (e);
1536                 }
1537
1538                 protected void RealizeProperties ()
1539                 {
1540                         // FIXME: TODO
1541                 }
1542
1543                 protected void UpdateExtendedStyles ()
1544                 {
1545                         // FIXME: TODO
1546                 }
1547
1548                 protected override void WndProc (ref Message m)
1549                 {
1550                         base.WndProc (ref m);
1551                 }
1552                 #endregion // Protected Methods
1553
1554                 #region Public Instance Methods
1555                 public void ArrangeIcons ()
1556                 {
1557                         ArrangeIcons (this.alignment);
1558                 }
1559
1560                 public void ArrangeIcons (ListViewAlignment alignment)
1561                 {
1562                         // Icons are arranged only if view is set to LargeIcon or SmallIcon
1563                         if (view == View.LargeIcon || view == View.SmallIcon) {
1564                                 this.CalculateListView (alignment);
1565                                 // we have done the calculations already
1566                                 this.Redraw (false);
1567                         }
1568                 }
1569
1570                 public void BeginUpdate ()
1571                 {
1572                         // flag to avoid painting
1573                         updating = true;
1574                 }
1575
1576                 public void Clear ()
1577                 {
1578                         columns.Clear ();
1579                         items.Clear (); // Redraw (true) called here
1580                 }
1581
1582                 public void EndUpdate ()
1583                 {
1584                         // flag to avoid painting
1585                         updating = false;
1586
1587                         // probably, now we need a redraw with recalculations
1588                         this.Redraw (true);
1589                 }
1590
1591                 public void EnsureVisible (int index)
1592                 {
1593                         if (index < 0 || index >= items.Count || scrollable == false)
1594                                 return;
1595
1596                         Rectangle view_rect = item_control.ClientRectangle;
1597                         Rectangle bounds = items [index].Bounds;
1598
1599                         if (view_rect.Contains (bounds))
1600                                 return;
1601
1602                         if (bounds.Left < 0)
1603                                 h_scroll.Value += bounds.Left;
1604                         else if (bounds.Right > view_rect.Right)
1605                                 h_scroll.Value += (bounds.Right - view_rect.Right);
1606
1607                         if (bounds.Top < 0)
1608                                 v_scroll.Value += bounds.Top;
1609                         else if (bounds.Bottom > view_rect.Bottom)
1610                                 v_scroll.Value += (bounds.Bottom - view_rect.Bottom);
1611                 }
1612
1613                 public ListViewItem GetItemAt (int x, int y)
1614                 {
1615                         foreach (ListViewItem item in items) {
1616                                 if (item.Bounds.Contains (x, y))
1617                                         return item;
1618                         }
1619                         return null;
1620                 }
1621
1622                 public Rectangle GetItemRect (int index)
1623                 {
1624                         return GetItemRect (index, ItemBoundsPortion.Entire);
1625                 }
1626
1627                 public Rectangle GetItemRect (int index, ItemBoundsPortion portion)
1628                 {
1629                         if (index < 0 || index >= items.Count)
1630                                 throw new IndexOutOfRangeException ("Invalid Index");
1631
1632                         return items [index].GetBounds (portion);
1633                 }
1634
1635                 public void Sort ()
1636                 {
1637                         if (sort_order != SortOrder.None)
1638                                 items.list.Sort (item_sorter);
1639
1640                         if (sort_order == SortOrder.Descending)
1641                                 items.list.Reverse ();
1642
1643                         this.Redraw (true);
1644                 }
1645
1646                 public override string ToString ()
1647                 {
1648                         int count = this.Items.Count;
1649
1650                         if (count == 0)
1651                                 return string.Format ("System.Windows.Forms.ListView, Items.Count: 0");
1652                         else
1653                                 return string.Format ("System.Windows.Forms.ListView, Items.Count: {0}, Items[0]: {1}", count, this.Items [0].ToString ());
1654                 }
1655                 #endregion      // Public Instance Methods
1656
1657
1658                 #region Subclasses
1659
1660                 class HeaderControl : Control {
1661
1662                         ListView owner;
1663                         bool column_resize_active = false;
1664                         ColumnHeader resize_column;
1665                         ColumnHeader clicked_column;
1666                         ColumnHeader drag_column;
1667                         int drag_x;
1668                         int drag_to_index = -1;
1669
1670                         public HeaderControl (ListView owner)
1671                         {
1672                                 this.owner = owner;
1673                                 MouseDown += new MouseEventHandler (HeaderMouseDown);
1674                                 MouseMove += new MouseEventHandler (HeaderMouseMove);
1675                                 MouseUp += new MouseEventHandler (HeaderMouseUp);
1676                                 Paint += new PaintEventHandler (HeaderPaint);
1677                         }
1678
1679                         private ColumnHeader ColumnAtX (int x)
1680                         {
1681                                 Point pt = new Point (x, 0);
1682                                 ColumnHeader result = null;
1683                                 foreach (ColumnHeader col in owner.Columns) {
1684                                         if (col.Rect.Contains (pt)) {
1685                                                 result = col;
1686                                                 break;
1687                                         }
1688                                 }
1689                                 return result;
1690                         }
1691
1692                         private int GetReorderedIndex (ColumnHeader col)
1693                         {
1694                                 if (owner.reordered_column_indices == null)
1695                                         return col.Index;
1696                                 else
1697                                         for (int i = 0; i < owner.Columns.Count; i++)
1698                                                 if (owner.reordered_column_indices [i] == col.Index)
1699                                                         return i;
1700                                 throw new Exception ("Column index missing from reordered array");
1701                         }
1702
1703                         private void HeaderMouseDown (object sender, MouseEventArgs me)
1704                         {
1705                                 if (resize_column != null) {
1706                                         column_resize_active = true;
1707                                         Capture = true;
1708                                         return;
1709                                 }
1710
1711                                 clicked_column = ColumnAtX (me.X + owner.h_marker);
1712
1713                                 if (clicked_column != null) {
1714                                         Capture = true;
1715                                         if (owner.AllowColumnReorder) {
1716                                                 drag_x = me.X;
1717                                                 drag_column = (ColumnHeader) clicked_column.Clone ();
1718                                                 drag_column.column_rect = clicked_column.Rect;
1719                                                 drag_to_index = GetReorderedIndex (clicked_column);
1720                                         }
1721                                         clicked_column.pressed = true;
1722                                         Rectangle bounds = clicked_column.Rect;
1723                                         bounds.X -= owner.h_marker;
1724                                         Invalidate (bounds);
1725                                         return;
1726                                 }
1727                         }
1728
1729                         private void HeaderMouseMove (object sender, MouseEventArgs me)
1730                         {
1731                                 Point pt = new Point (me.X + owner.h_marker, me.Y);
1732
1733                                 if (column_resize_active)  {
1734                                         resize_column.Width = pt.X - resize_column.X;
1735                                         if (resize_column.Width < 0)
1736                                                 resize_column.Width = 0;
1737                                         return;
1738                                 }
1739
1740                                 resize_column = null;
1741
1742                                 if (clicked_column != null) {
1743                                         if (owner.AllowColumnReorder) {
1744                                                 Rectangle r;
1745
1746                                                 r = drag_column.column_rect;
1747                                                 r.X = clicked_column.Rect.X + me.X - drag_x;
1748                                                 drag_column.column_rect = r;
1749
1750                                                 int x = me.X + owner.h_marker;
1751                                                 ColumnHeader over = ColumnAtX (x);
1752                                                 if (x < over.X + over.Width / 2)
1753                                                         drag_to_index = GetReorderedIndex (over);
1754                                                 else
1755                                                         drag_to_index = GetReorderedIndex (over) + 1;
1756                                                 Invalidate ();
1757                                         } else {
1758                                                 ColumnHeader over = ColumnAtX (me.X + owner.h_marker);
1759                                                 bool pressed = clicked_column.pressed;
1760                                                 clicked_column.pressed = over == clicked_column;
1761                                                 if (clicked_column.pressed ^ pressed) {
1762                                                         Rectangle bounds = clicked_column.Rect;
1763                                                         bounds.X -= owner.h_marker;
1764                                                         Invalidate (bounds);
1765                                                 }
1766                                         }
1767                                         return;
1768                                 }
1769
1770                                 for (int i = 0; i < owner.Columns.Count; i++) {
1771                                         Rectangle zone = owner.Columns [i].Rect;
1772                                         zone.X = zone.Right - 5;
1773                                         zone.Width = 10;
1774                                         if (zone.Contains (pt)) {
1775                                                 resize_column = owner.Columns [i];
1776                                                 break;
1777                                         }
1778                                 }
1779
1780                                 if (resize_column == null)
1781                                         Cursor = Cursors.Default;
1782                                 else
1783                                         Cursor = Cursors.VSplit;
1784                         }
1785
1786                         void HeaderMouseUp (object sender, MouseEventArgs me)
1787                         {
1788                                 Capture = false;
1789
1790                                 if (column_resize_active) {
1791                                         column_resize_active = false;
1792                                         resize_column = null;
1793                                         Cursor = Cursors.Default;
1794                                         return;
1795                                 }
1796
1797                                 if (clicked_column != null && clicked_column.pressed) {
1798                                         clicked_column.pressed = false;
1799                                         Rectangle bounds = clicked_column.Rect;
1800                                         bounds.X -= owner.h_marker;
1801                                         Invalidate (bounds);
1802                                         owner.OnColumnClick (new ColumnClickEventArgs (clicked_column.Index));
1803                                 }
1804
1805                                 if (drag_column != null && owner.AllowColumnReorder) {
1806                                         drag_column = null;
1807                                         if (drag_to_index > GetReorderedIndex (clicked_column))
1808                                                 drag_to_index--;
1809                                         if (owner.GetReorderedColumn (drag_to_index) != clicked_column)
1810                                                 owner.ReorderColumn (clicked_column, drag_to_index);
1811                                         drag_to_index = -1;
1812                                         Invalidate ();
1813                                 }
1814
1815                                 clicked_column = null;
1816                         }
1817
1818                         void HeaderPaint (object sender, PaintEventArgs pe)
1819                         {
1820                                 if (Width <= 0 || Height <=  0 || !Visible || owner.updating)
1821                                         return;
1822
1823                                 Theme theme = ThemeEngine.Current;
1824                                 theme.DrawListViewHeader (pe.Graphics, pe.ClipRectangle, this.owner);
1825
1826                                 if (drag_column == null)
1827                                         return;
1828
1829                                 int target_x;
1830                                 if (drag_to_index == owner.Columns.Count)
1831                                         target_x = owner.GetReorderedColumn (drag_to_index - 1).Rect.Right - owner.h_marker;
1832                                 else
1833                                         target_x = owner.GetReorderedColumn (drag_to_index).Rect.X - owner.h_marker;
1834                                 theme.DrawListViewHeaderDragDetails (pe.Graphics, owner, drag_column, target_x);
1835                         }
1836
1837                 }
1838
1839                 public class CheckedIndexCollection : IList, ICollection, IEnumerable
1840                 {
1841                         internal ArrayList list;
1842                         private ListView owner;
1843
1844                         #region Public Constructor
1845                         public CheckedIndexCollection (ListView owner)
1846                         {
1847                                 list = new ArrayList ();
1848                                 this.owner = owner;
1849                         }
1850                         #endregion      // Public Constructor
1851
1852                         #region Public Properties
1853                         [Browsable (false)]
1854                         public virtual int Count {
1855                                 get { return list.Count; }
1856                         }
1857
1858                         public virtual bool IsReadOnly {
1859                                 get { return true; }
1860                         }
1861
1862                         public int this [int index] {
1863                                 get {
1864                                         if (index < 0 || index >= list.Count)
1865                                                 throw new ArgumentOutOfRangeException ("Index out of range.");
1866                                         return (int) list [index];
1867                                 }
1868                         }
1869
1870                         bool ICollection.IsSynchronized {
1871                                 get { return false; }
1872                         }
1873
1874                         object ICollection.SyncRoot {
1875                                 get { return this; }
1876                         }
1877
1878                         bool IList.IsFixedSize {
1879                                 get { return true; }
1880                         }
1881
1882                         object IList.this [int index] {
1883                                 get { return this [index]; }
1884                                 set { throw new NotSupportedException ("SetItem operation is not supported."); }
1885                         }
1886                         #endregion      // Public Properties
1887
1888                         #region Public Methods
1889                         public bool Contains (int checkedIndex)
1890                         {
1891                                 return list.Contains (checkedIndex);
1892                         }
1893
1894                         public virtual IEnumerator GetEnumerator ()
1895                         {
1896                                 return list.GetEnumerator ();
1897                         }
1898
1899                         void ICollection.CopyTo (Array dest, int index)
1900                         {
1901                                 list.CopyTo (dest, index);
1902                         }
1903
1904                         int IList.Add (object value)
1905                         {
1906                                 throw new NotSupportedException ("Add operation is not supported.");
1907                         }
1908
1909                         void IList.Clear ()
1910                         {
1911                                 throw new NotSupportedException ("Clear operation is not supported.");
1912                         }
1913
1914                         bool IList.Contains (object checkedIndex)
1915                         {
1916                                 return list.Contains (checkedIndex);
1917                         }
1918
1919                         int IList.IndexOf (object checkedIndex)
1920                         {
1921                                 return list.IndexOf (checkedIndex);
1922                         }
1923
1924                         void IList.Insert (int index, object value)
1925                         {
1926                                 throw new NotSupportedException ("Insert operation is not supported.");
1927                         }
1928
1929                         void IList.Remove (object value)
1930                         {
1931                                 throw new NotSupportedException ("Remove operation is not supported.");
1932                         }
1933
1934                         void IList.RemoveAt (int index)
1935                         {
1936                                 throw new NotSupportedException ("RemoveAt operation is not supported.");
1937                         }
1938
1939                         public int IndexOf (int checkedIndex)
1940                         {
1941                                 return list.IndexOf (checkedIndex);
1942                         }
1943                         #endregion      // Public Methods
1944
1945                 }       // CheckedIndexCollection
1946
1947                 public class CheckedListViewItemCollection : IList, ICollection, IEnumerable
1948                 {
1949                         internal ArrayList list;
1950                         private ListView owner;
1951
1952                         #region Public Constructor
1953                         public CheckedListViewItemCollection (ListView owner)
1954                         {
1955                                 list = new ArrayList ();
1956                                 this.owner = owner;
1957                         }
1958                         #endregion      // Public Constructor
1959
1960                         #region Public Properties
1961                         [Browsable (false)]
1962                         public virtual int Count {
1963                                 get { return list.Count; }
1964                         }
1965
1966                         public virtual bool IsReadOnly {
1967                                 get { return true; }
1968                         }
1969
1970                         public ListViewItem this [int index] {
1971                                 get {
1972                                         if (index < 0 || index >= list.Count)
1973                                                 throw new ArgumentOutOfRangeException ("Index out of range.");
1974                                         return (ListViewItem) list [index];
1975                                 }
1976                         }
1977
1978                         bool ICollection.IsSynchronized {
1979                                 get { return list.IsSynchronized; }
1980                         }
1981
1982                         object ICollection.SyncRoot {
1983                                 get { return this; }
1984                         }
1985
1986                         bool IList.IsFixedSize {
1987                                 get { return true; }
1988                         }
1989
1990                         object IList.this [int index] {
1991                                 get { return this [index]; }
1992                                 set { throw new NotSupportedException ("SetItem operation is not supported."); }
1993                         }
1994                         #endregion      // Public Properties
1995
1996                         #region Public Methods
1997                         public bool Contains (ListViewItem item)
1998                         {
1999                                 return list.Contains (item);
2000                         }
2001
2002                         public virtual void CopyTo (Array dest, int index)
2003                         {
2004                                 list.CopyTo (dest, index);
2005                         }
2006
2007                         public virtual IEnumerator GetEnumerator ()
2008                         {
2009                                 return list.GetEnumerator ();
2010                         }
2011
2012                         int IList.Add (object value)
2013                         {
2014                                 throw new NotSupportedException ("Add operation is not supported.");
2015                         }
2016
2017                         void IList.Clear ()
2018                         {
2019                                 throw new NotSupportedException ("Clear operation is not supported.");
2020                         }
2021
2022                         bool IList.Contains (object item)
2023                         {
2024                                 return list.Contains (item);
2025                         }
2026
2027                         int IList.IndexOf (object item)
2028                         {
2029                                 return list.IndexOf (item);
2030                         }
2031
2032                         void IList.Insert (int index, object value)
2033                         {
2034                                 throw new NotSupportedException ("Insert operation is not supported.");
2035                         }
2036
2037                         void IList.Remove (object value)
2038                         {
2039                                 throw new NotSupportedException ("Remove operation is not supported.");
2040                         }
2041
2042                         void IList.RemoveAt (int index)
2043                         {
2044                                 throw new NotSupportedException ("RemoveAt operation is not supported.");
2045                         }
2046
2047                         public int IndexOf (ListViewItem item)
2048                         {
2049                                 return list.IndexOf (item);
2050                         }
2051                         #endregion      // Public Methods
2052
2053                 }       // CheckedListViewItemCollection
2054
2055                 public class ColumnHeaderCollection : IList, ICollection, IEnumerable
2056                 {
2057                         internal ArrayList list;
2058                         private ListView owner;
2059
2060                         #region Public Constructor
2061                         public ColumnHeaderCollection (ListView owner)
2062                         {
2063                                 list = new ArrayList ();
2064                                 this.owner = owner;
2065                         }
2066                         #endregion      // Public Constructor
2067
2068                         #region Public Properties
2069                         [Browsable (false)]
2070                         public virtual int Count {
2071                                 get { return list.Count; }
2072                         }
2073
2074                         public virtual bool IsReadOnly {
2075                                 get { return false; }
2076                         }
2077
2078                         public virtual ColumnHeader this [int index] {
2079                                 get {
2080                                         if (index < 0 || index >= list.Count)
2081                                                 throw new ArgumentOutOfRangeException ("Index out of range.");
2082                                         return (ColumnHeader) list [index];
2083                                 }
2084                         }
2085
2086                         bool ICollection.IsSynchronized {
2087                                 get { return true; }
2088                         }
2089
2090                         object ICollection.SyncRoot {
2091                                 get { return this; }
2092                         }
2093
2094                         bool IList.IsFixedSize {
2095                                 get { return list.IsFixedSize; }
2096                         }
2097
2098                         object IList.this [int index] {
2099                                 get { return this [index]; }
2100                                 set { throw new NotSupportedException ("SetItem operation is not supported."); }
2101                         }
2102                         #endregion      // Public Properties
2103
2104                         #region Public Methods
2105                         public virtual int Add (ColumnHeader value)
2106                         {
2107                                 int idx;
2108                                 value.owner = this.owner;
2109                                 idx = list.Add (value);
2110                                 owner.Redraw (true);
2111                                 return idx;
2112                         }
2113
2114                         public virtual ColumnHeader Add (string str, int width, HorizontalAlignment textAlign)
2115                         {
2116                                 ColumnHeader colHeader = new ColumnHeader (this.owner, str, textAlign, width);
2117                                 this.Add (colHeader);
2118                                 return colHeader;
2119                         }
2120
2121                         public virtual void AddRange (ColumnHeader [] values)
2122                         {
2123                                 foreach (ColumnHeader colHeader in values) {
2124                                         colHeader.owner = this.owner;
2125                                         Add (colHeader);
2126                                 }
2127
2128                                 owner.Redraw (true);
2129                         }
2130
2131                         public virtual void Clear ()
2132                         {
2133                                 list.Clear ();
2134                                 owner.Redraw (true);
2135                         }
2136
2137                         public bool Contains (ColumnHeader value)
2138                         {
2139                                 return list.Contains (value);
2140                         }
2141
2142                         public virtual IEnumerator GetEnumerator ()
2143                         {
2144                                 return list.GetEnumerator ();
2145                         }
2146
2147                         void ICollection.CopyTo (Array dest, int index)
2148                         {
2149                                 list.CopyTo (dest, index);
2150                         }
2151
2152                         int IList.Add (object value)
2153                         {
2154                                 if (! (value is ColumnHeader)) {
2155                                         throw new ArgumentException ("Not of type ColumnHeader", "value");
2156                                 }
2157
2158                                 return this.Add ((ColumnHeader) value);
2159                         }
2160
2161                         bool IList.Contains (object value)
2162                         {
2163                                 if (! (value is ColumnHeader)) {
2164                                         throw new ArgumentException ("Not of type ColumnHeader", "value");
2165                                 }
2166
2167                                 return this.Contains ((ColumnHeader) value);
2168                         }
2169
2170                         int IList.IndexOf (object value)
2171                         {
2172                                 if (! (value is ColumnHeader)) {
2173                                         throw new ArgumentException ("Not of type ColumnHeader", "value");
2174                                 }
2175
2176                                 return this.IndexOf ((ColumnHeader) value);
2177                         }
2178
2179                         void IList.Insert (int index, object value)
2180                         {
2181                                 if (! (value is ColumnHeader)) {
2182                                         throw new ArgumentException ("Not of type ColumnHeader", "value");
2183                                 }
2184
2185                                 this.Insert (index, (ColumnHeader) value);
2186                         }
2187
2188                         void IList.Remove (object value)
2189                         {
2190                                 if (! (value is ColumnHeader)) {
2191                                         throw new ArgumentException ("Not of type ColumnHeader", "value");
2192                                 }
2193
2194                                 this.Remove ((ColumnHeader) value);
2195                         }
2196
2197                         public int IndexOf (ColumnHeader value)
2198                         {
2199                                 return list.IndexOf (value);
2200                         }
2201
2202                         public void Insert (int index, ColumnHeader value)
2203                         {
2204                                 // LAMESPEC: MSDOCS say greater than or equal to the value of the Count property
2205                                 // but it's really only greater.
2206                                 if (index < 0 || index > list.Count)
2207                                         throw new ArgumentOutOfRangeException ("Index out of range.");
2208
2209                                 value.owner = this.owner;
2210                                 list.Insert (index, value);
2211                                 owner.Redraw (true);
2212                         }
2213
2214                         public void Insert (int index, string str, int width, HorizontalAlignment textAlign)
2215                         {
2216                                 ColumnHeader colHeader = new ColumnHeader (this.owner, str, textAlign, width);
2217                                 this.Insert (index, colHeader);
2218                         }
2219
2220                         public virtual void Remove (ColumnHeader column)
2221                         {
2222                                 // TODO: Update Column internal index ?
2223                                 list.Remove (column);
2224                                 owner.Redraw (true);
2225                         }
2226
2227                         public virtual void RemoveAt (int index)
2228                         {
2229                                 if (index < 0 || index >= list.Count)
2230                                         throw new ArgumentOutOfRangeException ("Index out of range.");
2231
2232                                 // TODO: Update Column internal index ?
2233                                 list.RemoveAt (index);
2234                                 owner.Redraw (true);
2235                         }
2236                         #endregion      // Public Methods
2237
2238
2239                 }       // ColumnHeaderCollection
2240
2241                 public class ListViewItemCollection : IList, ICollection, IEnumerable
2242                 {
2243                         internal ArrayList list;
2244                         private ListView owner;
2245
2246                         #region Public Constructor
2247                         public ListViewItemCollection (ListView owner)
2248                         {
2249                                 list = new ArrayList ();
2250                                 this.owner = owner;
2251                         }
2252                         #endregion      // Public Constructor
2253
2254                         #region Public Properties
2255                         [Browsable (false)]
2256                         public virtual int Count {
2257                                 get { return list.Count; }
2258                         }
2259
2260                         public virtual bool IsReadOnly {
2261                                 get { return false; }
2262                         }
2263
2264                         public virtual ListViewItem this [int displayIndex] {
2265                                 get {
2266                                         if (displayIndex < 0 || displayIndex >= list.Count)
2267                                                 throw new ArgumentOutOfRangeException ("Index out of range.");
2268                                         return (ListViewItem) list [displayIndex];
2269                                 }
2270
2271                                 set {
2272                                         if (displayIndex < 0 || displayIndex >= list.Count)
2273                                                 throw new ArgumentOutOfRangeException ("Index out of range.");
2274
2275                                         if (list.Contains (value))
2276                                                 throw new ArgumentException ("An item cannot be added more than once. To add an item again, you need to clone it.", "value");
2277
2278                                         value.Owner = owner;
2279                                         list [displayIndex] = value;
2280
2281                                         owner.Redraw (true);
2282                                 }
2283                         }
2284
2285                         bool ICollection.IsSynchronized {
2286                                 get { return true; }
2287                         }
2288
2289                         object ICollection.SyncRoot {
2290                                 get { return this; }
2291                         }
2292
2293                         bool IList.IsFixedSize {
2294                                 get { return list.IsFixedSize; }
2295                         }
2296
2297                         object IList.this [int index] {
2298                                 get { return this [index]; }
2299                                 set {
2300                                         if (value is ListViewItem)
2301                                                 this [index] = (ListViewItem) value;
2302                                         else
2303                                                 this [index] = new ListViewItem (value.ToString ());
2304                                 }
2305                         }
2306                         #endregion      // Public Properties
2307
2308                         #region Public Methods
2309                         public virtual ListViewItem Add (ListViewItem value)
2310                         {
2311                                 if (list.Contains (value))
2312                                         throw new ArgumentException ("An item cannot be added more than once. To add an item again, you need to clone it.", "value");
2313
2314                                 value.Owner = owner;
2315                                 list.Add (value);
2316
2317                                 if (owner.Sorting != SortOrder.None)
2318                                         owner.Sort ();
2319
2320                                 owner.Redraw (true);
2321
2322                                 return value;
2323                         }
2324
2325                         public virtual ListViewItem Add (string text)
2326                         {
2327                                 ListViewItem item = new ListViewItem (text);
2328                                 return this.Add (item);
2329                         }
2330
2331                         public virtual ListViewItem Add (string text, int imageIndex)
2332                         {
2333                                 ListViewItem item = new ListViewItem (text, imageIndex);
2334                                 return this.Add (item);
2335                         }
2336
2337                         public void AddRange (ListViewItem [] values)
2338                         {
2339                                 list.Clear ();
2340                                 owner.SelectedItems.list.Clear ();
2341                                 owner.SelectedIndices.list.Clear ();
2342                                 owner.CheckedItems.list.Clear ();
2343                                 owner.CheckedIndices.list.Clear ();
2344
2345                                 foreach (ListViewItem item in values) {
2346                                         item.Owner = owner;
2347                                         list.Add (item);
2348                                 }
2349
2350                                 if (owner.Sorting != SortOrder.None)
2351                                         owner.Sort ();
2352
2353                                 owner.Redraw (true);
2354                         }
2355
2356                         public virtual void Clear ()
2357                         {
2358                                 owner.SetFocusedItem (null);
2359                                 owner.h_scroll.Value = owner.v_scroll.Value = 0;
2360                                 list.Clear ();
2361                                 owner.SelectedItems.list.Clear ();
2362                                 owner.SelectedIndices.list.Clear ();
2363                                 owner.CheckedItems.list.Clear ();
2364                                 owner.CheckedIndices.list.Clear ();
2365                                 owner.Redraw (true);
2366                         }
2367
2368                         public bool Contains (ListViewItem item)
2369                         {
2370                                 return list.Contains (item);
2371                         }
2372
2373                         public virtual void CopyTo (Array dest, int index)
2374                         {
2375                                 list.CopyTo (dest, index);
2376                         }
2377
2378                         public virtual IEnumerator GetEnumerator ()
2379                         {
2380                                 return list.GetEnumerator ();
2381                         }
2382
2383                         int IList.Add (object item)
2384                         {
2385                                 int result;
2386                                 ListViewItem li;
2387
2388                                 if (item is ListViewItem) {
2389                                         li = (ListViewItem) item;
2390                                         if (list.Contains (li))
2391                                                 throw new ArgumentException ("An item cannot be added more than once. To add an item again, you need to clone it.", "item");
2392                                 }
2393                                 else
2394                                         li = new ListViewItem (item.ToString ());
2395
2396                                 li.Owner = owner;
2397                                 result = list.Add (li);
2398                                 owner.Redraw (true);
2399
2400                                 return result;
2401                         }
2402
2403                         bool IList.Contains (object item)
2404                         {
2405                                 return list.Contains (item);
2406                         }
2407
2408                         int IList.IndexOf (object item)
2409                         {
2410                                 return list.IndexOf (item);
2411                         }
2412
2413                         void IList.Insert (int index, object item)
2414                         {
2415                                 if (item is ListViewItem)
2416                                         this.Insert (index, (ListViewItem) item);
2417                                 else
2418                                         this.Insert (index, item.ToString ());
2419                         }
2420
2421                         void IList.Remove (object item)
2422                         {
2423                                 Remove ((ListViewItem) item);
2424                         }
2425
2426                         public int IndexOf (ListViewItem item)
2427                         {
2428                                 return list.IndexOf (item);
2429                         }
2430
2431                         public ListViewItem Insert (int index, ListViewItem item)
2432                         {
2433                                 // LAMESPEC: MSDOCS say greater than or equal to the value of the Count property
2434                                 // but it's really only greater.
2435                                 if (index < 0 || index > list.Count)
2436                                         throw new ArgumentOutOfRangeException ("Index out of range.");
2437
2438                                 if (list.Contains (item))
2439                                         throw new ArgumentException ("An item cannot be added more than once. To add an item again, you need to clone it.", "item");
2440
2441                                 item.Owner = owner;
2442                                 list.Insert (index, item);
2443                                 owner.Redraw (true);
2444                                 return item;
2445                         }
2446
2447                         public ListViewItem Insert (int index, string text)
2448                         {
2449                                 return this.Insert (index, new ListViewItem (text));
2450                         }
2451
2452                         public ListViewItem Insert (int index, string text, int imageIndex)
2453                         {
2454                                 return this.Insert (index, new ListViewItem (text, imageIndex));
2455                         }
2456
2457                         public virtual void Remove (ListViewItem item)
2458                         {
2459                                 if (!list.Contains (item))
2460                                         return;
2461
2462                                 owner.SelectedItems.list.Remove (item);
2463                                 owner.SelectedIndices.list.Remove (item.Index);
2464                                 owner.CheckedItems.list.Remove (item);
2465                                 owner.CheckedIndices.list.Remove (item.Index);
2466                                 list.Remove (item);
2467                                 owner.Redraw (true);
2468                         }
2469
2470                         public virtual void RemoveAt (int index)
2471                         {
2472                                 if (index < 0 || index >= list.Count)
2473                                         throw new ArgumentOutOfRangeException ("Index out of range.");
2474
2475                                 list.RemoveAt (index);
2476                                 owner.SelectedItems.list.RemoveAt (index);
2477                                 owner.SelectedIndices.list.RemoveAt (index);
2478                                 owner.CheckedItems.list.RemoveAt (index);
2479                                 owner.CheckedIndices.list.RemoveAt (index);
2480                                 owner.Redraw (false);
2481                         }
2482                         #endregion      // Public Methods
2483
2484                 }       // ListViewItemCollection
2485
2486                 public class SelectedIndexCollection : IList, ICollection, IEnumerable
2487                 {
2488                         internal ArrayList list;
2489                         private ListView owner;
2490
2491                         #region Public Constructor
2492                         public SelectedIndexCollection (ListView owner)
2493                         {
2494                                 list = new ArrayList ();
2495                                 this.owner = owner;
2496                         }
2497                         #endregion      // Public Constructor
2498
2499                         #region Public Properties
2500                         [Browsable (false)]
2501                         public virtual int Count {
2502                                 get { return list.Count; }
2503                         }
2504
2505                         public virtual bool IsReadOnly {
2506                                 get { return true; }
2507                         }
2508
2509                         public int this [int index] {
2510                                 get {
2511                                         if (index < 0 || index >= list.Count)
2512                                                 throw new ArgumentOutOfRangeException ("Index out of range.");
2513                                         return (int) list [index];
2514                                 }
2515                         }
2516
2517                         bool ICollection.IsSynchronized {
2518                                 get { return list.IsSynchronized; }
2519                         }
2520
2521                         object ICollection.SyncRoot {
2522                                 get { return this; }
2523                         }
2524
2525                         bool IList.IsFixedSize {
2526                                 get { return true; }
2527                         }
2528
2529                         object IList.this [int index] {
2530                                 get { return this [index]; }
2531                                 set { throw new NotSupportedException ("SetItem operation is not supported."); }
2532                         }
2533                         #endregion      // Public Properties
2534
2535                         #region Public Methods
2536                         public bool Contains (int selectedIndex)
2537                         {
2538                                 return list.Contains (selectedIndex);
2539                         }
2540
2541                         public virtual void CopyTo (Array dest, int index)
2542                         {
2543                                 list.CopyTo (dest, index);
2544                         }
2545
2546                         public virtual IEnumerator GetEnumerator ()
2547                         {
2548                                 return list.GetEnumerator ();
2549                         }
2550
2551                         int IList.Add (object value)
2552                         {
2553                                 throw new NotSupportedException ("Add operation is not supported.");
2554                         }
2555
2556                         void IList.Clear ()
2557                         {
2558                                 throw new NotSupportedException ("Clear operation is not supported.");
2559                         }
2560
2561                         bool IList.Contains (object selectedIndex)
2562                         {
2563                                 return list.Contains (selectedIndex);
2564                         }
2565
2566                         int IList.IndexOf (object selectedIndex)
2567                         {
2568                                 return list.IndexOf (selectedIndex);
2569                         }
2570
2571                         void IList.Insert (int index, object value)
2572                         {
2573                                 throw new NotSupportedException ("Insert operation is not supported.");
2574                         }
2575
2576                         void IList.Remove (object value)
2577                         {
2578                                 throw new NotSupportedException ("Remove operation is not supported.");
2579                         }
2580
2581                         void IList.RemoveAt (int index)
2582                         {
2583                                 throw new NotSupportedException ("RemoveAt operation is not supported.");
2584                         }
2585
2586                         public int IndexOf (int selectedIndex)
2587                         {
2588                                 return list.IndexOf (selectedIndex);
2589                         }
2590                         #endregion      // Public Methods
2591
2592                 }       // SelectedIndexCollection
2593
2594                 public class SelectedListViewItemCollection : IList, ICollection, IEnumerable
2595                 {
2596                         internal ArrayList list;
2597                         private ListView owner;
2598
2599                         #region Public Constructor
2600                         public SelectedListViewItemCollection (ListView owner)
2601                         {
2602                                 list = new ArrayList ();
2603                                 this.owner = owner;
2604                         }
2605                         #endregion      // Public Constructor
2606
2607                         #region Public Properties
2608                         [Browsable (false)]
2609                         public virtual int Count {
2610                                 get { return list.Count; }
2611                         }
2612
2613                         public virtual bool IsReadOnly {
2614                                 get { return true; }
2615                         }
2616
2617                         public ListViewItem this [int index] {
2618                                 get {
2619                                         if (index < 0 || index >= list.Count)
2620                                                 throw new ArgumentOutOfRangeException ("Index out of range.");
2621                                         return (ListViewItem) list [index];
2622                                 }
2623                         }
2624
2625                         bool ICollection.IsSynchronized {
2626                                 get { return list.IsSynchronized; }
2627                         }
2628
2629                         object ICollection.SyncRoot {
2630                                 get { return this; }
2631                         }
2632
2633                         bool IList.IsFixedSize {
2634                                 get { return true; }
2635                         }
2636
2637                         object IList.this [int index] {
2638                                 get { return this [index]; }
2639                                 set { throw new NotSupportedException ("SetItem operation is not supported."); }
2640                         }
2641                         #endregion      // Public Properties
2642
2643                         #region Public Methods
2644                         public virtual void Clear ()
2645                         {
2646                                 ArrayList copy = (ArrayList) list.Clone ();
2647                                 for (int i = 0; i < copy.Count; i++)
2648                                         ((ListViewItem) copy [i]).Selected = false;
2649
2650                                 list.Clear ();
2651                         }
2652
2653                         public bool Contains (ListViewItem item)
2654                         {
2655                                 return list.Contains (item);
2656                         }
2657
2658                         public virtual void CopyTo (Array dest, int index)
2659                         {
2660                                 list.CopyTo (dest, index);
2661                         }
2662
2663                         public virtual IEnumerator GetEnumerator ()
2664                         {
2665                                 return list.GetEnumerator ();
2666                         }
2667
2668                         int IList.Add (object value)
2669                         {
2670                                 throw new NotSupportedException ("Add operation is not supported.");
2671                         }
2672
2673                         bool IList.Contains (object item)
2674                         {
2675                                 return list.Contains (item);
2676                         }
2677
2678                         int IList.IndexOf (object item)
2679                         {
2680                                 return list.IndexOf (item);
2681                         }
2682
2683                         void IList.Insert (int index, object value)
2684                         {
2685                                 throw new NotSupportedException ("Insert operation is not supported.");
2686                         }
2687
2688                         void IList.Remove (object value)
2689                         {
2690                                 throw new NotSupportedException ("Remove operation is not supported.");
2691                         }
2692
2693                         void IList.RemoveAt (int index)
2694                         {
2695                                 throw new NotSupportedException ("RemoveAt operation is not supported.");
2696                         }
2697
2698                         public int IndexOf (ListViewItem item)
2699                         {
2700                                 return list.IndexOf (item);
2701                         }
2702                         #endregion      // Public Methods
2703
2704                 }       // SelectedListViewItemCollection
2705
2706                 #endregion // Subclasses
2707         }
2708 }