src/msw/treectrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        treectrl.cpp
   3 // Purpose:     wxTreeCtrl
   4 // Author:      Julian Smart
   5 // Modified by: Vadim Zeitlin to be less MSW-specific on 10.10.98
   6 // Created:     1997
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19 #ifdef __GNUG__
  20     #pragma implementation "treectrl.h"
  21 #endif
  22
  23 // For compilers that support precompilation, includes "wx.h".
  24 #include "wx/wxprec.h"
  25
  26 #ifdef __BORLANDC__
  27     #pragma hdrstop
  28 #endif
  29
  30 #include "wx/window.h"
  31 #include "wx/msw/private.h"
  32
  33 // Mingw32 is a bit mental even though this is done in winundef
  34 #ifdef GetFirstChild
  35     #undef GetFirstChild
  36 #endif
  37
  38 #ifdef GetNextSibling
  39     #undef GetNextSibling
  40 #endif
  41
  42 #if defined(__WIN95__)
  43
  44 #include "wx/log.h"
  45 #include "wx/dynarray.h"
  46 #include "wx/imaglist.h"
  47 #include "wx/treectrl.h"
  48
  49 #ifdef __GNUWIN32__
  50 #ifndef wxUSE_NORLANDER_HEADERS
  51 #include "wx/msw/gnuwin32/extra.h"
  52 #endif
  53 #endif
  54
  55 #if (defined(__WIN95__) && !defined(__GNUWIN32__)) || defined(__TWIN32__) || defined(wxUSE_NORLANDER_HEADERS)
  56     #include <commctrl.h>
  57 #endif
  58
  59 // Bug in headers, sometimes
  60 #ifndef TVIS_FOCUSED
  61     #define TVIS_FOCUSED            0x0001
  62 #endif
  63
  64 // ----------------------------------------------------------------------------
  65 // private classes
  66 // ----------------------------------------------------------------------------
  67
  68 // a convenient wrapper around TV_ITEM struct which adds a ctor
  69 struct wxTreeViewItem : public TV_ITEM
  70 {
  71     wxTreeViewItem(const wxTreeItemId& item,    // the item handle
  72                    UINT mask_,                  // fields which are valid
  73                    UINT stateMask_ = 0)         // for TVIF_STATE only
  74     {
  75         // hItem member is always valid
  76         mask = mask_ | TVIF_HANDLE;
  77         stateMask = stateMask_;
  78         hItem = (HTREEITEM) (WXHTREEITEM) item;
  79     }
  80 };
  81
  82 // a class which encapsulates the tree traversal logic: it vists all (unless
  83 // OnVisit() returns FALSE) items under the given one
  84 class wxTreeTraversal
  85 {
  86 public:
  87     wxTreeTraversal(const wxTreeCtrl *tree)
  88     {
  89         m_tree = tree;
  90     }
  91
  92     // do traverse the tree: visit all items (recursively by default) under the
  93     // given one; return TRUE if all items were traversed or FALSE if the
  94     // traversal was aborted because OnVisit returned FALSE
  95     bool DoTraverse(const wxTreeItemId& root, bool recursively = TRUE);
  96
  97     // override this function to do whatever is needed for each item, return
  98     // FALSE to stop traversing
  99     virtual bool OnVisit(const wxTreeItemId& item) = 0;
 100
 101 protected:
 102     const wxTreeCtrl *GetTree() const { return m_tree; }
 103
 104 private:
 105     bool Traverse(const wxTreeItemId& root, bool recursively);
 106
 107     const wxTreeCtrl *m_tree;
 108 };
 109
 110 // ----------------------------------------------------------------------------
 111 // macros
 112 // ----------------------------------------------------------------------------
 113
 114 #if !USE_SHARED_LIBRARY
 115     IMPLEMENT_DYNAMIC_CLASS(wxTreeCtrl, wxControl)
 116 #endif
 117
 118 // ----------------------------------------------------------------------------
 119 // variables
 120 // ----------------------------------------------------------------------------
 121
 122 // handy table for sending events
 123 static const wxEventType g_events[2][2] =
 124 {
 125     { wxEVT_COMMAND_TREE_ITEM_COLLAPSED, wxEVT_COMMAND_TREE_ITEM_COLLAPSING },
 126     { wxEVT_COMMAND_TREE_ITEM_EXPANDED,  wxEVT_COMMAND_TREE_ITEM_EXPANDING  }
 127 };
 128
 129 // ============================================================================
 130 // implementation
 131 // ============================================================================
 132
 133 // ----------------------------------------------------------------------------
 134 // tree traversal
 135 // ----------------------------------------------------------------------------
 136
 137 bool wxTreeTraversal::DoTraverse(const wxTreeItemId& root, bool recursively)
 138 {
 139     if ( !OnVisit(root) )
 140         return FALSE;
 141
 142     return Traverse(root, recursively);
 143 }
 144
 145 bool wxTreeTraversal::Traverse(const wxTreeItemId& root, bool recursively)
 146 {
 147     long cookie;
 148     wxTreeItemId child = m_tree->GetFirstChild(root, cookie);
 149     while ( child.IsOk() )
 150     {
 151         // depth first traversal
 152         if ( recursively && !Traverse(child, TRUE) )
 153             return FALSE;
 154
 155         if ( !OnVisit(child) )
 156             return FALSE;
 157
 158         child = m_tree->GetNextChild(root, cookie);
 159     }
 160
 161     return TRUE;
 162 }
 163
 164 // ----------------------------------------------------------------------------
 165 // construction and destruction
 166 // ----------------------------------------------------------------------------
 167
 168 void wxTreeCtrl::Init()
 169 {
 170     m_imageListNormal = NULL;
 171     m_imageListState = NULL;
 172     m_textCtrl = NULL;
 173 }
 174
 175 bool wxTreeCtrl::Create(wxWindow *parent,
 176                         wxWindowID id,
 177                         const wxPoint& pos,
 178                         const wxSize& size,
 179                         long style,
 180                         const wxValidator& validator,
 181                         const wxString& name)
 182 {
 183     Init();
 184
 185     if ( !CreateControl(parent, id, pos, size, style, validator, name) )
 186         return FALSE;
 187
 188     DWORD wstyle = WS_VISIBLE | WS_CHILD | WS_TABSTOP |
 189                    TVS_HASLINES | TVS_SHOWSELALWAYS;
 190
 191     if ( m_windowStyle & wxTR_HAS_BUTTONS )
 192         wstyle |= TVS_HASBUTTONS;
 193
 194     if ( m_windowStyle & wxTR_EDIT_LABELS )
 195         wstyle |= TVS_EDITLABELS;
 196
 197     if ( m_windowStyle & wxTR_LINES_AT_ROOT )
 198         wstyle |= TVS_LINESATROOT;
 199
 200 #if !defined( __GNUWIN32__ ) && !defined(wxUSE_NORLANDER_HEADERS)
 201     // we emulate the multiple selection tree controls by using checkboxes: set
 202     // up the image list we need for this if we do have multiple selections
 203     if ( m_windowStyle & wxTR_MULTIPLE )
 204         wstyle |= TVS_CHECKBOXES;
 205 #endif
 206
 207     // Create the tree control.
 208     if ( !MSWCreateControl(WC_TREEVIEW, wstyle) )
 209         return FALSE;
 210
 211     // the treectrl with any other background looks ugly because the items
 212     // background is white anyhow
 213     SetBackgroundColour(*wxWHITE);
 214
 215     // VZ: this is some experimental code which may be used to get the
 216     //     TVS_CHECKBOXES style functionality for comctl32.dll < 4.71.
 217     //     AFAIK, the standard DLL does about the same thing anyhow.
 218 #if 0
 219     if ( m_windowStyle & wxTR_MULTIPLE )
 220     {
 221         wxBitmap bmp;
 222
 223         // create the DC compatible with the current screen
 224         HDC hdcMem = CreateCompatibleDC(NULL);
 225
 226         // create a mono bitmap of the standard size
 227         int x = GetSystemMetrics(SM_CXMENUCHECK);
 228         int y = GetSystemMetrics(SM_CYMENUCHECK);
 229         wxImageList imagelistCheckboxes(x, y, FALSE, 2);
 230         HBITMAP hbmpCheck = CreateBitmap(x, y,   // bitmap size
 231                                          1,      // # of color planes
 232                                          1,      // # bits needed for one pixel
 233                                          0);     // array containing colour data
 234         SelectObject(hdcMem, hbmpCheck);
 235
 236         // then draw a check mark into it
 237         RECT rect = { 0, 0, x, y };
 238         if ( !::DrawFrameControl(hdcMem, &rect,
 239                                  DFC_BUTTON,
 240                                  DFCS_BUTTONCHECK | DFCS_CHECKED) )
 241         {
 242             wxLogLastError(_T("DrawFrameControl(check)"));
 243         }
 244
 245         bmp.SetHBITMAP((WXHBITMAP)hbmpCheck);
 246         imagelistCheckboxes.Add(bmp);
 247
 248         if ( !::DrawFrameControl(hdcMem, &rect,
 249                                  DFC_BUTTON,
 250                                  DFCS_BUTTONCHECK) )
 251         {
 252             wxLogLastError(_T("DrawFrameControl(uncheck)"));
 253         }
 254
 255         bmp.SetHBITMAP((WXHBITMAP)hbmpCheck);
 256         imagelistCheckboxes.Add(bmp);
 257
 258         // clean up
 259         ::DeleteDC(hdcMem);
 260
 261         // set the imagelist
 262         SetStateImageList(&imagelistCheckboxes);
 263     }
 264 #endif // 0
 265
 266     SetSize(pos.x, pos.y, size.x, size.y);
 267
 268     return TRUE;
 269 }
 270
 271 wxTreeCtrl::~wxTreeCtrl()
 272 {
 273     DeleteTextCtrl();
 274
 275     // delete user data to prevent memory leaks
 276     DeleteAllItems();
 277 }
 278
 279 // ----------------------------------------------------------------------------
 280 // accessors
 281 // ----------------------------------------------------------------------------
 282
 283 // simple wrappers which add error checking in debug mode
 284
 285 bool wxTreeCtrl::DoGetItem(wxTreeViewItem* tvItem) const
 286 {
 287     if ( !TreeView_GetItem(GetHwnd(), tvItem) )
 288     {
 289         wxLogLastError("TreeView_GetItem");
 290
 291         return FALSE;
 292     }
 293
 294     return TRUE;
 295 }
 296
 297 void wxTreeCtrl::DoSetItem(wxTreeViewItem* tvItem)
 298 {
 299     if ( TreeView_SetItem(GetHwnd(), tvItem) == -1 )
 300     {
 301         wxLogLastError("TreeView_SetItem");
 302     }
 303 }
 304
 305 size_t wxTreeCtrl::GetCount() const
 306 {
 307     return (size_t)TreeView_GetCount(GetHwnd());
 308 }
 309
 310 unsigned int wxTreeCtrl::GetIndent() const
 311 {
 312     return TreeView_GetIndent(GetHwnd());
 313 }
 314
 315 void wxTreeCtrl::SetIndent(unsigned int indent)
 316 {
 317     TreeView_SetIndent(GetHwnd(), indent);
 318 }
 319
 320 wxImageList *wxTreeCtrl::GetImageList() const
 321 {
 322     return m_imageListNormal;
 323 }
 324
 325 wxImageList *wxTreeCtrl::GetStateImageList() const
 326 {
 327     return m_imageListNormal;
 328 }
 329
 330 void wxTreeCtrl::SetAnyImageList(wxImageList *imageList, int which)
 331 {
 332     // no error return
 333     TreeView_SetImageList(GetHwnd(),
 334                           imageList ? imageList->GetHIMAGELIST() : 0,
 335                           which);
 336 }
 337
 338 void wxTreeCtrl::SetImageList(wxImageList *imageList)
 339 {
 340     SetAnyImageList(m_imageListNormal = imageList, TVSIL_NORMAL);
 341 }
 342
 343 void wxTreeCtrl::SetStateImageList(wxImageList *imageList)
 344 {
 345     SetAnyImageList(m_imageListState = imageList, TVSIL_STATE);
 346 }
 347
 348 size_t wxTreeCtrl::GetChildrenCount(const wxTreeItemId& item,
 349                                     bool recursively) const
 350 {
 351     class TraverseCounter : public wxTreeTraversal
 352     {
 353     public:
 354         TraverseCounter(const wxTreeCtrl *tree,
 355                         const wxTreeItemId& root,
 356                         bool recursively)
 357             : wxTreeTraversal(tree)
 358             {
 359                 m_count = 0;
 360
 361                 DoTraverse(root, recursively);
 362             }
 363
 364         virtual bool OnVisit(const wxTreeItemId& item)
 365         {
 366             m_count++;
 367
 368             return TRUE;
 369         }
 370
 371         size_t GetCount() const { return m_count; }
 372
 373     private:
 374         size_t m_count;
 375     } counter(this, item, recursively);
 376
 377     return counter.GetCount();
 378 }
 379
 380 // ----------------------------------------------------------------------------
 381 // Item access
 382 // ----------------------------------------------------------------------------
 383
 384 wxString wxTreeCtrl::GetItemText(const wxTreeItemId& item) const
 385 {
 386     wxChar buf[512];  // the size is arbitrary...
 387
 388     wxTreeViewItem tvItem(item, TVIF_TEXT);
 389     tvItem.pszText = buf;
 390     tvItem.cchTextMax = WXSIZEOF(buf);
 391     if ( !DoGetItem(&tvItem) )
 392     {
 393         // don't return some garbage which was on stack, but an empty string
 394         buf[0] = _T('\0');
 395     }
 396
 397     return wxString(buf);
 398 }
 399
 400 void wxTreeCtrl::SetItemText(const wxTreeItemId& item, const wxString& text)
 401 {
 402     wxTreeViewItem tvItem(item, TVIF_TEXT);
 403     tvItem.pszText = (wxChar *)text.c_str();  // conversion is ok
 404     DoSetItem(&tvItem);
 405 }
 406
 407 void wxTreeCtrl::DoSetItemImages(const wxTreeItemId& item,
 408                                  int image,
 409                                  int imageSel)
 410 {
 411     wxTreeViewItem tvItem(item, TVIF_IMAGE | TVIF_SELECTEDIMAGE);
 412     tvItem.iSelectedImage = imageSel;
 413     tvItem.iImage = image;
 414     DoSetItem(&tvItem);
 415 }
 416
 417 int wxTreeCtrl::GetItemImage(const wxTreeItemId& item) const
 418 {
 419     wxTreeViewItem tvItem(item, TVIF_IMAGE);
 420     DoGetItem(&tvItem);
 421
 422     return tvItem.iImage;
 423 }
 424
 425 void wxTreeCtrl::SetItemImage(const wxTreeItemId& item, int image)
 426 {
 427     // NB: at least in version 5.00.0518.9 of comctl32.dll we need to always
 428     //     change both normal and selected image - otherwise the change simply
 429     //     doesn't take place!
 430     DoSetItemImages(item, image, GetItemSelectedImage(item));
 431 }
 432
 433 int wxTreeCtrl::GetItemSelectedImage(const wxTreeItemId& item) const
 434 {
 435     wxTreeViewItem tvItem(item, TVIF_SELECTEDIMAGE);
 436     DoGetItem(&tvItem);
 437
 438     return tvItem.iSelectedImage;
 439 }
 440
 441 void wxTreeCtrl::SetItemSelectedImage(const wxTreeItemId& item, int image)
 442 {
 443     // NB: at least in version 5.00.0518.9 of comctl32.dll we need to always
 444     //     change both normal and selected image - otherwise the change simply
 445     //     doesn't take place!
 446     DoSetItemImages(item, GetItemImage(item), image);
 447 }
 448
 449 wxTreeItemData *wxTreeCtrl::GetItemData(const wxTreeItemId& item) const
 450 {
 451     wxTreeViewItem tvItem(item, TVIF_PARAM);
 452     if ( !DoGetItem(&tvItem) )
 453     {
 454         return NULL;
 455     }
 456
 457     return (wxTreeItemData *)tvItem.lParam;
 458 }
 459
 460 void wxTreeCtrl::SetItemData(const wxTreeItemId& item, wxTreeItemData *data)
 461 {
 462     wxTreeViewItem tvItem(item, TVIF_PARAM);
 463     tvItem.lParam = (LPARAM)data;
 464     DoSetItem(&tvItem);
 465 }
 466
 467 void wxTreeCtrl::SetItemHasChildren(const wxTreeItemId& item, bool has)
 468 {
 469     wxTreeViewItem tvItem(item, TVIF_CHILDREN);
 470     tvItem.cChildren = (int)has;
 471     DoSetItem(&tvItem);
 472 }
 473
 474 void wxTreeCtrl::SetItemBold(const wxTreeItemId& item, bool bold)
 475 {
 476     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_BOLD);
 477     tvItem.state = bold ? TVIS_BOLD : 0;
 478     DoSetItem(&tvItem);
 479 }
 480
 481 void wxTreeCtrl::SetItemDropHighlight(const wxTreeItemId& item, bool highlight)
 482 {
 483     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_DROPHILITED);
 484     tvItem.state = highlight ? TVIS_DROPHILITED : 0;
 485     DoSetItem(&tvItem);
 486 }
 487
 488 // ----------------------------------------------------------------------------
 489 // Item status
 490 // ----------------------------------------------------------------------------
 491
 492 bool wxTreeCtrl::IsVisible(const wxTreeItemId& item) const
 493 {
 494     // Bug in Gnu-Win32 headers, so don't use the macro TreeView_GetItemRect
 495     RECT rect;
 496     return SendMessage(GetHwnd(), TVM_GETITEMRECT, FALSE, (LPARAM)&rect) != 0;
 497
 498 }
 499
 500 bool wxTreeCtrl::ItemHasChildren(const wxTreeItemId& item) const
 501 {
 502     wxTreeViewItem tvItem(item, TVIF_CHILDREN);
 503     DoGetItem(&tvItem);
 504
 505     return tvItem.cChildren != 0;
 506 }
 507
 508 bool wxTreeCtrl::IsExpanded(const wxTreeItemId& item) const
 509 {
 510     // probably not a good idea to put it here
 511     //wxASSERT( ItemHasChildren(item) );
 512
 513     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_EXPANDED);
 514     DoGetItem(&tvItem);
 515
 516     return (tvItem.state & TVIS_EXPANDED) != 0;
 517 }
 518
 519 bool wxTreeCtrl::IsSelected(const wxTreeItemId& item) const
 520 {
 521     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_SELECTED);
 522     DoGetItem(&tvItem);
 523
 524     return (tvItem.state & TVIS_SELECTED) != 0;
 525 }
 526
 527 bool wxTreeCtrl::IsBold(const wxTreeItemId& item) const
 528 {
 529     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_BOLD);
 530     DoGetItem(&tvItem);
 531
 532     return (tvItem.state & TVIS_BOLD) != 0;
 533 }
 534
 535 // ----------------------------------------------------------------------------
 536 // navigation
 537 // ----------------------------------------------------------------------------
 538
 539 wxTreeItemId wxTreeCtrl::GetRootItem() const
 540 {
 541     return wxTreeItemId((WXHTREEITEM) TreeView_GetRoot(GetHwnd()));
 542 }
 543
 544 wxTreeItemId wxTreeCtrl::GetSelection() const
 545 {
 546     wxCHECK_MSG( !(m_windowStyle & wxTR_MULTIPLE), (WXHTREEITEM)0,
 547                  _T("this only works with single selection controls") );
 548
 549     return wxTreeItemId((WXHTREEITEM) TreeView_GetSelection(GetHwnd()));
 550 }
 551
 552 wxTreeItemId wxTreeCtrl::GetParent(const wxTreeItemId& item) const
 553 {
 554     return wxTreeItemId((WXHTREEITEM) TreeView_GetParent(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item));
 555 }
 556
 557 wxTreeItemId wxTreeCtrl::GetFirstChild(const wxTreeItemId& item,
 558                                        long& _cookie) const
 559 {
 560     // remember the last child returned in 'cookie'
 561     _cookie = (long)TreeView_GetChild(GetHwnd(), (HTREEITEM) (WXHTREEITEM)item);
 562
 563     return wxTreeItemId((WXHTREEITEM)_cookie);
 564 }
 565
 566 wxTreeItemId wxTreeCtrl::GetNextChild(const wxTreeItemId& WXUNUSED(item),
 567                                       long& _cookie) const
 568 {
 569     wxTreeItemId l = wxTreeItemId((WXHTREEITEM)TreeView_GetNextSibling(GetHwnd(),
 570                                    (HTREEITEM)(WXHTREEITEM)_cookie));
 571     _cookie = (long)l;
 572
 573     return l;
 574 }
 575
 576 wxTreeItemId wxTreeCtrl::GetLastChild(const wxTreeItemId& item) const
 577 {
 578     // can this be done more efficiently?
 579     long cookie;
 580
 581     wxTreeItemId childLast,
 582     child = GetFirstChild(item, cookie);
 583     while ( child.IsOk() )
 584     {
 585         childLast = child;
 586         child = GetNextChild(item, cookie);
 587     }
 588
 589     return childLast;
 590 }
 591
 592 wxTreeItemId wxTreeCtrl::GetNextSibling(const wxTreeItemId& item) const
 593 {
 594     return wxTreeItemId((WXHTREEITEM) TreeView_GetNextSibling(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item));
 595 }
 596
 597 wxTreeItemId wxTreeCtrl::GetPrevSibling(const wxTreeItemId& item) const
 598 {
 599     return wxTreeItemId((WXHTREEITEM) TreeView_GetPrevSibling(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item));
 600 }
 601
 602 wxTreeItemId wxTreeCtrl::GetFirstVisibleItem() const
 603 {
 604     return wxTreeItemId((WXHTREEITEM) TreeView_GetFirstVisible(GetHwnd()));
 605 }
 606
 607 wxTreeItemId wxTreeCtrl::GetNextVisible(const wxTreeItemId& item) const
 608 {
 609     wxASSERT_MSG( IsVisible(item), _T("The item you call GetNextVisible() "
 610                                       "for must be visible itself!"));
 611
 612     return wxTreeItemId((WXHTREEITEM) TreeView_GetNextVisible(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item));
 613 }
 614
 615 wxTreeItemId wxTreeCtrl::GetPrevVisible(const wxTreeItemId& item) const
 616 {
 617     wxASSERT_MSG( IsVisible(item), _T("The item you call GetPrevVisible() "
 618                                       "for must be visible itself!"));
 619
 620     return wxTreeItemId((WXHTREEITEM) TreeView_GetPrevVisible(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item));
 621 }
 622
 623 // ----------------------------------------------------------------------------
 624 // multiple selections emulation
 625 // ----------------------------------------------------------------------------
 626
 627 bool wxTreeCtrl::IsItemChecked(const wxTreeItemId& item) const
 628 {
 629     // receive the desired information.
 630     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_STATEIMAGEMASK);
 631     DoGetItem(&tvItem);
 632
 633     // state image indices are 1 based
 634     return ((tvItem.state >> 12) - 1) == 1;
 635 }
 636
 637 void wxTreeCtrl::SetItemCheck(const wxTreeItemId& item, bool check)
 638 {
 639     // receive the desired information.
 640     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_STATEIMAGEMASK);
 641
 642     // state images are one-based
 643     tvItem.state = (check ? 2 : 1) << 12;
 644
 645     DoSetItem(&tvItem);
 646 }
 647
 648 size_t wxTreeCtrl::GetSelections(wxArrayTreeItemIds& selections) const
 649 {
 650     class TraverseSelections : public wxTreeTraversal
 651     {
 652     public:
 653         TraverseSelections(const wxTreeCtrl *tree,
 654                            wxArrayTreeItemIds& selections)
 655             : wxTreeTraversal(tree), m_selections(selections)
 656             {
 657                 m_selections.Empty();
 658
 659                 DoTraverse(tree->GetRootItem());
 660             }
 661
 662         virtual bool OnVisit(const wxTreeItemId& item)
 663         {
 664             if ( GetTree()->IsItemChecked(item) )
 665             {
 666                 m_selections.Add(item);
 667             }
 668
 669             return TRUE;
 670         }
 671
 672     private:
 673         wxArrayTreeItemIds& m_selections;
 674     } selector(this, selections);
 675
 676     return selections.GetCount();
 677 }
 678
 679 // ----------------------------------------------------------------------------
 680 // Usual operations
 681 // ----------------------------------------------------------------------------
 682
 683 wxTreeItemId wxTreeCtrl::DoInsertItem(const wxTreeItemId& parent,
 684                                       wxTreeItemId hInsertAfter,
 685                                       const wxString& text,
 686                                       int image, int selectedImage,
 687                                       wxTreeItemData *data)
 688 {
 689     TV_INSERTSTRUCT tvIns;
 690     tvIns.hParent = (HTREEITEM) (WXHTREEITEM)parent;
 691     tvIns.hInsertAfter = (HTREEITEM) (WXHTREEITEM) hInsertAfter;
 692
 693     // This is how we insert the item as the first child: supply a NULL hInsertAfter
 694     if (tvIns.hInsertAfter == (HTREEITEM) 0)
 695     {
 696         tvIns.hInsertAfter = TVI_FIRST;
 697     }
 698
 699     UINT mask = 0;
 700     if ( !text.IsEmpty() )
 701     {
 702         mask |= TVIF_TEXT;
 703         tvIns.item.pszText = (wxChar *)text.c_str();  // cast is ok
 704     }
 705
 706     if ( image != -1 )
 707     {
 708         mask |= TVIF_IMAGE;
 709         tvIns.item.iImage = image;
 710
 711         if ( selectedImage == -1 )
 712         {
 713             // take the same image for selected icon if not specified
 714             selectedImage = image;
 715         }
 716     }
 717
 718     if ( selectedImage != -1 )
 719     {
 720         mask |= TVIF_SELECTEDIMAGE;
 721         tvIns.item.iSelectedImage = selectedImage;
 722     }
 723
 724     if ( data != NULL )
 725     {
 726         mask |= TVIF_PARAM;
 727         tvIns.item.lParam = (LPARAM)data;
 728     }
 729
 730     tvIns.item.mask = mask;
 731
 732     HTREEITEM id = (HTREEITEM) TreeView_InsertItem(GetHwnd(), &tvIns);
 733     if ( id == 0 )
 734     {
 735         wxLogLastError("TreeView_InsertItem");
 736     }
 737
 738     if ( data != NULL )
 739     {
 740         // associate the application tree item with Win32 tree item handle
 741         data->SetId((WXHTREEITEM)id);
 742     }
 743
 744     return wxTreeItemId((WXHTREEITEM)id);
 745 }
 746
 747 // for compatibility only
 748 wxTreeItemId wxTreeCtrl::InsertItem(const wxTreeItemId& parent,
 749                                     const wxString& text,
 750                                     int image, int selImage,
 751                                     long insertAfter)
 752 {
 753     return DoInsertItem(parent, (WXHTREEITEM)insertAfter, text,
 754                         image, selImage, NULL);
 755 }
 756
 757 wxTreeItemId wxTreeCtrl::AddRoot(const wxString& text,
 758                                  int image, int selectedImage,
 759                                  wxTreeItemData *data)
 760 {
 761     return DoInsertItem(wxTreeItemId((WXHTREEITEM) 0), (WXHTREEITEM) 0,
 762                         text, image, selectedImage, data);
 763 }
 764
 765 wxTreeItemId wxTreeCtrl::PrependItem(const wxTreeItemId& parent,
 766                                      const wxString& text,
 767                                      int image, int selectedImage,
 768                                      wxTreeItemData *data)
 769 {
 770     return DoInsertItem(parent, (WXHTREEITEM) TVI_FIRST,
 771                         text, image, selectedImage, data);
 772 }
 773
 774 wxTreeItemId wxTreeCtrl::InsertItem(const wxTreeItemId& parent,
 775                                     const wxTreeItemId& idPrevious,
 776                                     const wxString& text,
 777                                     int image, int selectedImage,
 778                                     wxTreeItemData *data)
 779 {
 780     return DoInsertItem(parent, idPrevious, text, image, selectedImage, data);
 781 }
 782
 783 wxTreeItemId wxTreeCtrl::AppendItem(const wxTreeItemId& parent,
 784                                     const wxString& text,
 785                                     int image, int selectedImage,
 786                                     wxTreeItemData *data)
 787 {
 788     return DoInsertItem(parent, (WXHTREEITEM) TVI_LAST,
 789                         text, image, selectedImage, data);
 790 }
 791
 792 void wxTreeCtrl::Delete(const wxTreeItemId& item)
 793 {
 794     if ( !TreeView_DeleteItem(GetHwnd(), (HTREEITEM)(WXHTREEITEM)item) )
 795     {
 796         wxLogLastError("TreeView_DeleteItem");
 797     }
 798 }
 799
 800 // delete all children (but don't delete the item itself)
 801 void wxTreeCtrl::DeleteChildren(const wxTreeItemId& item)
 802 {
 803     long cookie;
 804
 805     wxArrayLong children;
 806     wxTreeItemId child = GetFirstChild(item, cookie);
 807     while ( child.IsOk() )
 808     {
 809         children.Add((long)(WXHTREEITEM)child);
 810
 811         child = GetNextChild(item, cookie);
 812     }
 813
 814     size_t nCount = children.Count();
 815     for ( size_t n = 0; n < nCount; n++ )
 816     {
 817         if ( !TreeView_DeleteItem(GetHwnd(), (HTREEITEM)children[n]) )
 818         {
 819             wxLogLastError("TreeView_DeleteItem");
 820         }
 821     }
 822 }
 823
 824 void wxTreeCtrl::DeleteAllItems()
 825 {
 826     if ( !TreeView_DeleteAllItems(GetHwnd()) )
 827     {
 828         wxLogLastError("TreeView_DeleteAllItems");
 829     }
 830 }
 831
 832 void wxTreeCtrl::DoExpand(const wxTreeItemId& item, int flag)
 833 {
 834     wxASSERT_MSG( flag == TVE_COLLAPSE ||
 835                   flag == (TVE_COLLAPSE | TVE_COLLAPSERESET) ||
 836                   flag == TVE_EXPAND   ||
 837                   flag == TVE_TOGGLE,
 838                   _T("Unknown flag in wxTreeCtrl::DoExpand") );
 839
 840     // TreeView_Expand doesn't send TVN_ITEMEXPAND(ING) messages, so we must
 841     // emulate them. This behaviour has changed slightly with comctl32.dll
 842     // v 4.70 - now it does send them but only the first time. To maintain
 843     // compatible behaviour and also in order to not have surprises with the
 844     // future versions, don't rely on this and still do everything ourselves.
 845     // To avoid that the messages be sent twice when the item is expanded for
 846     // the first time we must clear TVIS_EXPANDEDONCE style manually.
 847
 848     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_EXPANDEDONCE);
 849     tvItem.state = 0;
 850     DoSetItem(&tvItem);
 851
 852     if ( TreeView_Expand(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item, flag) != 0 )
 853     {
 854         wxTreeEvent event(wxEVT_NULL, m_windowId);
 855         event.m_item = item;
 856
 857         bool isExpanded = IsExpanded(item);
 858
 859         event.SetEventObject(this);
 860
 861         // FIXME return value of {EXPAND|COLLAPS}ING event handler is discarded
 862         event.SetEventType(g_events[isExpanded][TRUE]);
 863         GetEventHandler()->ProcessEvent(event);
 864
 865         event.SetEventType(g_events[isExpanded][FALSE]);
 866         GetEventHandler()->ProcessEvent(event);
 867     }
 868     //else: change didn't took place, so do nothing at all
 869 }
 870
 871 void wxTreeCtrl::Expand(const wxTreeItemId& item)
 872 {
 873     DoExpand(item, TVE_EXPAND);
 874 }
 875
 876 void wxTreeCtrl::Collapse(const wxTreeItemId& item)
 877 {
 878     DoExpand(item, TVE_COLLAPSE);
 879 }
 880
 881 void wxTreeCtrl::CollapseAndReset(const wxTreeItemId& item)
 882 {
 883     DoExpand(item, TVE_COLLAPSE | TVE_COLLAPSERESET);
 884 }
 885
 886 void wxTreeCtrl::Toggle(const wxTreeItemId& item)
 887 {
 888     DoExpand(item, TVE_TOGGLE);
 889 }
 890
 891 void wxTreeCtrl::ExpandItem(const wxTreeItemId& item, int action)
 892 {
 893     DoExpand(item, action);
 894 }
 895
 896 void wxTreeCtrl::Unselect()
 897 {
 898     wxASSERT_MSG( !(m_windowStyle & wxTR_MULTIPLE), _T("doesn't make sense") );
 899
 900     // just remove the selection
 901     SelectItem(wxTreeItemId((WXHTREEITEM) 0));
 902 }
 903
 904 void wxTreeCtrl::UnselectAll()
 905 {
 906     if ( m_windowStyle & wxTR_MULTIPLE )
 907     {
 908         wxArrayTreeItemIds selections;
 909         size_t count = GetSelections(selections);
 910         for ( size_t n = 0; n < count; n++ )
 911         {
 912             SetItemCheck(selections[n], FALSE);
 913         }
 914     }
 915     else
 916     {
 917         // just remove the selection
 918         Unselect();
 919     }
 920 }
 921
 922 void wxTreeCtrl::SelectItem(const wxTreeItemId& item)
 923 {
 924     if ( m_windowStyle & wxTR_MULTIPLE )
 925     {
 926         // selecting the item means checking it
 927         SetItemCheck(item);
 928     }
 929     else
 930     {
 931         // inspite of the docs (MSDN Jan 99 edition), we don't seem to receive
 932         // the notification from the control (i.e. TVN_SELCHANG{ED|ING}), so
 933         // send them ourselves
 934
 935         wxTreeEvent event(wxEVT_NULL, m_windowId);
 936         event.m_item = item;
 937         event.SetEventObject(this);
 938
 939         event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGING);
 940         if ( !GetEventHandler()->ProcessEvent(event) || event.IsAllowed() )
 941         {
 942             if ( !TreeView_SelectItem(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item) )
 943             {
 944                 wxLogLastError("TreeView_SelectItem");
 945             }
 946             else
 947             {
 948                 event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGED);
 949                 (void)GetEventHandler()->ProcessEvent(event);
 950             }
 951         }
 952         //else: program vetoed the change
 953     }
 954 }
 955
 956 void wxTreeCtrl::EnsureVisible(const wxTreeItemId& item)
 957 {
 958     // no error return
 959     TreeView_EnsureVisible(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item);
 960 }
 961
 962 void wxTreeCtrl::ScrollTo(const wxTreeItemId& item)
 963 {
 964     if ( !TreeView_SelectSetFirstVisible(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item) )
 965     {
 966         wxLogLastError("TreeView_SelectSetFirstVisible");
 967     }
 968 }
 969
 970 wxTextCtrl* wxTreeCtrl::GetEditControl() const
 971 {
 972     return m_textCtrl;
 973 }
 974
 975 void wxTreeCtrl::DeleteTextCtrl()
 976 {
 977     if ( m_textCtrl )
 978     {
 979         m_textCtrl->UnsubclassWin();
 980         m_textCtrl->SetHWND(0);
 981         delete m_textCtrl;
 982         m_textCtrl = NULL;
 983     }
 984 }
 985
 986 wxTextCtrl* wxTreeCtrl::EditLabel(const wxTreeItemId& item,
 987                                   wxClassInfo* textControlClass)
 988 {
 989     wxASSERT( textControlClass->IsKindOf(CLASSINFO(wxTextCtrl)) );
 990
 991     HWND hWnd = (HWND) TreeView_EditLabel(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item);
 992
 993     // this is not an error - the TVN_BEGINLABELEDIT handler might have
 994     // returned FALSE
 995     if ( !hWnd )
 996     {
 997         return NULL;
 998     }
 999
1000     DeleteTextCtrl();
1001
1002     m_textCtrl = (wxTextCtrl *)textControlClass->CreateObject();
1003     m_textCtrl->SetHWND((WXHWND)hWnd);
1004     m_textCtrl->SubclassWin((WXHWND)hWnd);
1005
1006     return m_textCtrl;
1007 }
1008
1009 // End label editing, optionally cancelling the edit
1010 void wxTreeCtrl::EndEditLabel(const wxTreeItemId& item, bool discardChanges)
1011 {
1012     TreeView_EndEditLabelNow(GetHwnd(), discardChanges);
1013
1014     DeleteTextCtrl();
1015 }
1016
1017 wxTreeItemId wxTreeCtrl::HitTest(const wxPoint& point, int& flags)
1018 {
1019     TV_HITTESTINFO hitTestInfo;
1020     hitTestInfo.pt.x = (int)point.x;
1021     hitTestInfo.pt.y = (int)point.y;
1022
1023     TreeView_HitTest(GetHwnd(), &hitTestInfo);
1024
1025     flags = 0;
1026
1027     // avoid repetition
1028     #define TRANSLATE_FLAG(flag) if ( hitTestInfo.flags & TVHT_##flag ) \
1029                                     flags |= wxTREE_HITTEST_##flag
1030
1031     TRANSLATE_FLAG(ABOVE);
1032     TRANSLATE_FLAG(BELOW);
1033     TRANSLATE_FLAG(NOWHERE);
1034     TRANSLATE_FLAG(ONITEMBUTTON);
1035     TRANSLATE_FLAG(ONITEMICON);
1036     TRANSLATE_FLAG(ONITEMINDENT);
1037     TRANSLATE_FLAG(ONITEMLABEL);
1038     TRANSLATE_FLAG(ONITEMRIGHT);
1039     TRANSLATE_FLAG(ONITEMSTATEICON);
1040     TRANSLATE_FLAG(TOLEFT);
1041     TRANSLATE_FLAG(TORIGHT);
1042
1043     #undef TRANSLATE_FLAG
1044
1045     return wxTreeItemId((WXHTREEITEM) hitTestInfo.hItem);
1046 }
1047
1048 bool wxTreeCtrl::GetBoundingRect(const wxTreeItemId& item,
1049                                  wxRect& rect,
1050                                  bool textOnly) const
1051 {
1052     RECT rc;
1053     if ( TreeView_GetItemRect(GetHwnd(), (HTREEITEM)(WXHTREEITEM)item,
1054                               &rc, textOnly) )
1055     {
1056         rect = wxRect(wxPoint(rc.left, rc.top), wxPoint(rc.right, rc.bottom));
1057
1058         return TRUE;
1059     }
1060     else
1061     {
1062         // couldn't retrieve rect: for example, item isn't visible
1063         return FALSE;
1064     }
1065 }
1066
1067 // ----------------------------------------------------------------------------
1068 // sorting stuff
1069 // ----------------------------------------------------------------------------
1070
1071 static int CALLBACK TreeView_CompareCallback(wxTreeItemData *pItem1,
1072                                              wxTreeItemData *pItem2,
1073                                              wxTreeCtrl *tree)
1074 {
1075     wxCHECK_MSG( pItem1 && pItem2, 0,
1076                  _T("sorting tree without data doesn't make sense") );
1077
1078     return tree->OnCompareItems(pItem1->GetId(), pItem2->GetId());
1079 }
1080
1081 int wxTreeCtrl::OnCompareItems(const wxTreeItemId& item1,
1082                                const wxTreeItemId& item2)
1083 {
1084     return wxStrcmp(GetItemText(item1), GetItemText(item2));
1085 }
1086
1087 void wxTreeCtrl::SortChildren(const wxTreeItemId& item)
1088 {
1089     // rely on the fact that TreeView_SortChildren does the same thing as our
1090     // default behaviour, i.e. sorts items alphabetically and so call it
1091     // directly if we're not in derived class (much more efficient!)
1092     if ( GetClassInfo() == CLASSINFO(wxTreeCtrl) )
1093     {
1094         TreeView_SortChildren(GetHwnd(), (HTREEITEM)(WXHTREEITEM)item, 0);
1095     }
1096     else
1097     {
1098         TV_SORTCB tvSort;
1099         tvSort.hParent = (HTREEITEM)(WXHTREEITEM)item;
1100         tvSort.lpfnCompare = (PFNTVCOMPARE)TreeView_CompareCallback;
1101         tvSort.lParam = (LPARAM)this;
1102         TreeView_SortChildrenCB(GetHwnd(), &tvSort, 0 /* reserved */);
1103     }
1104 }
1105
1106 // ----------------------------------------------------------------------------
1107 // implementation
1108 // ----------------------------------------------------------------------------
1109
1110 bool wxTreeCtrl::MSWCommand(WXUINT cmd, WXWORD id)
1111 {
1112     if ( cmd == EN_UPDATE )
1113     {
1114         wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, id);
1115         event.SetEventObject( this );
1116         ProcessCommand(event);
1117     }
1118     else if ( cmd == EN_KILLFOCUS )
1119     {
1120         wxCommandEvent event(wxEVT_KILL_FOCUS, id);
1121         event.SetEventObject( this );
1122         ProcessCommand(event);
1123     }
1124     else
1125     {
1126         // nothing done
1127         return FALSE;
1128     }
1129
1130     // command processed
1131     return TRUE;
1132 }
1133
1134 // process WM_NOTIFY Windows message
1135 bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1136 {
1137     wxTreeEvent event(wxEVT_NULL, m_windowId);
1138     wxEventType eventType = wxEVT_NULL;
1139     NMHDR *hdr = (NMHDR *)lParam;
1140
1141     switch ( hdr->code )
1142     {
1143         case TVN_BEGINDRAG:
1144             eventType = wxEVT_COMMAND_TREE_BEGIN_DRAG;
1145             // fall through
1146
1147         case TVN_BEGINRDRAG:
1148             {
1149                 if ( eventType == wxEVT_NULL )
1150                     eventType = wxEVT_COMMAND_TREE_BEGIN_RDRAG;
1151                 //else: left drag, already set above
1152
1153                 NM_TREEVIEW *tv = (NM_TREEVIEW *)lParam;
1154
1155                 event.m_item = (WXHTREEITEM) tv->itemNew.hItem;
1156                 event.m_pointDrag = wxPoint(tv->ptDrag.x, tv->ptDrag.y);
1157                 break;
1158             }
1159
1160         case TVN_BEGINLABELEDIT:
1161             {
1162                 eventType = wxEVT_COMMAND_TREE_BEGIN_LABEL_EDIT;
1163                 TV_DISPINFO *info = (TV_DISPINFO *)lParam;
1164
1165                 event.m_item = (WXHTREEITEM) info->item.hItem;
1166                 event.m_label = info->item.pszText;
1167                 break;
1168             }
1169
1170         case TVN_DELETEITEM:
1171             {
1172                 eventType = wxEVT_COMMAND_TREE_DELETE_ITEM;
1173                 NM_TREEVIEW *tv = (NM_TREEVIEW *)lParam;
1174
1175                 event.m_item = (WXHTREEITEM) tv->itemOld.hItem;
1176                 break;
1177             }
1178
1179         case TVN_ENDLABELEDIT:
1180             {
1181                 eventType = wxEVT_COMMAND_TREE_END_LABEL_EDIT;
1182                 TV_DISPINFO *info = (TV_DISPINFO *)lParam;
1183
1184                 event.m_item = (WXHTREEITEM)info->item.hItem;
1185                 event.m_label = info->item.pszText;
1186                 break;
1187             }
1188
1189         case TVN_GETDISPINFO:
1190             eventType = wxEVT_COMMAND_TREE_GET_INFO;
1191             // fall through
1192
1193         case TVN_SETDISPINFO:
1194             {
1195                 if ( eventType == wxEVT_NULL )
1196                     eventType = wxEVT_COMMAND_TREE_SET_INFO;
1197                 //else: get, already set above
1198
1199                 TV_DISPINFO *info = (TV_DISPINFO *)lParam;
1200
1201                 event.m_item = (WXHTREEITEM) info->item.hItem;
1202                 break;
1203             }
1204
1205         case TVN_ITEMEXPANDING:
1206             event.m_code = FALSE;
1207             // fall through
1208
1209         case TVN_ITEMEXPANDED:
1210             {
1211                 NM_TREEVIEW* tv = (NM_TREEVIEW*)lParam;
1212
1213                 bool expand = FALSE;
1214                 switch ( tv->action )
1215                 {
1216                     case TVE_EXPAND:
1217                         expand = TRUE;
1218                         break;
1219
1220                     case TVE_COLLAPSE:
1221                         expand = FALSE;
1222                         break;
1223
1224                     default:
1225                         wxLogDebug(_T("unexpected code %d in TVN_ITEMEXPAND "
1226                                       "message"), tv->action);
1227                 }
1228
1229                 bool ing = (hdr->code == TVN_ITEMEXPANDING);
1230                 eventType = g_events[expand][ing];
1231
1232                 event.m_item = (WXHTREEITEM) tv->itemNew.hItem;
1233                 break;
1234             }
1235
1236         case TVN_KEYDOWN:
1237             {
1238                 eventType = wxEVT_COMMAND_TREE_KEY_DOWN;
1239                 TV_KEYDOWN *info = (TV_KEYDOWN *)lParam;
1240
1241                 event.m_code = wxCharCodeMSWToWX(info->wVKey);
1242
1243                 // a separate event for this case
1244                 if ( info->wVKey == VK_SPACE || info->wVKey == VK_RETURN )
1245                 {
1246                     wxTreeEvent event2(wxEVT_COMMAND_TREE_ITEM_ACTIVATED,
1247                                        m_windowId);
1248                     event2.SetEventObject(this);
1249
1250                     GetEventHandler()->ProcessEvent(event2);
1251                 }
1252                 break;
1253             }
1254
1255         case TVN_SELCHANGED:
1256             eventType = wxEVT_COMMAND_TREE_SEL_CHANGED;
1257             // fall through
1258
1259         case TVN_SELCHANGING:
1260             {
1261                 if ( eventType == wxEVT_NULL )
1262                     eventType = wxEVT_COMMAND_TREE_SEL_CHANGING;
1263                 //else: already set above
1264
1265                 NM_TREEVIEW* tv = (NM_TREEVIEW *)lParam;
1266
1267                 event.m_item = (WXHTREEITEM) tv->itemNew.hItem;
1268                 event.m_itemOld = (WXHTREEITEM) tv->itemOld.hItem;
1269                 break;
1270             }
1271
1272         default:
1273             return wxControl::MSWOnNotify(idCtrl, lParam, result);
1274     }
1275
1276     event.SetEventObject(this);
1277     event.SetEventType(eventType);
1278
1279     bool processed = GetEventHandler()->ProcessEvent(event);
1280
1281     // post processing
1282     switch ( hdr->code )
1283     {
1284         case TVN_DELETEITEM:
1285             {
1286                 // NB: we might process this message using wxWindows event
1287                 //     tables, but due to overhead of wxWin event system we
1288                 //     prefer to do it here ourself (otherwise deleting a tree
1289                 //     with many items is just too slow)
1290                 NM_TREEVIEW* tv = (NM_TREEVIEW *)lParam;
1291                 wxTreeItemData *data = (wxTreeItemData *)tv->itemOld.lParam;
1292                 delete data; // may be NULL, ok
1293
1294                 processed = TRUE; // Make sure we don't get called twice
1295             }
1296             break;
1297
1298         case TVN_BEGINLABELEDIT:
1299             // return TRUE to cancel label editing
1300             *result = !event.IsAllowed();
1301             break;
1302
1303         case TVN_ENDLABELEDIT:
1304             // return TRUE to set the label to the new string
1305             *result = event.IsAllowed();
1306
1307             // ensure that we don't have the text ctrl which is going to be
1308             // deleted any more
1309             DeleteTextCtrl();
1310             break;
1311
1312         case TVN_SELCHANGING:
1313         case TVN_ITEMEXPANDING:
1314             // return TRUE to prevent the action from happening
1315             *result = !event.IsAllowed();
1316             break;
1317
1318         //default:
1319             // for the other messages the return value is ignored and there is
1320             // nothing special to do
1321     }
1322
1323     return processed;
1324 }
1325
1326 // ----------------------------------------------------------------------------
1327 // Tree event
1328 // ----------------------------------------------------------------------------
1329
1330 IMPLEMENT_DYNAMIC_CLASS(wxTreeEvent, wxNotifyEvent)
1331
1332 wxTreeEvent::wxTreeEvent(wxEventType commandType, int id)
1333            : wxNotifyEvent(commandType, id)
1334 {
1335     m_code = 0;
1336     m_itemOld = 0;
1337 }
1338
1339 #endif // __WIN95__
1340