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( __BORLANDC__ ) && !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 !defined(__VISUALC__) || (__VISUALC__ != 1010)
 204     if ( m_windowStyle & wxTR_MULTIPLE )
 205         wstyle |= TVS_CHECKBOXES;
 206 #endif
 207 #endif
 208
 209     // Create the tree control.
 210     if ( !MSWCreateControl(WC_TREEVIEW, wstyle) )
 211         return FALSE;
 212
 213     // the treectrl with any other background looks ugly because the items
 214     // background is white anyhow
 215     SetBackgroundColour(*wxWHITE);
 216
 217     // VZ: this is some experimental code which may be used to get the
 218     //     TVS_CHECKBOXES style functionality for comctl32.dll < 4.71.
 219     //     AFAIK, the standard DLL does about the same thing anyhow.
 220 #if 0
 221     if ( m_windowStyle & wxTR_MULTIPLE )
 222     {
 223         wxBitmap bmp;
 224
 225         // create the DC compatible with the current screen
 226         HDC hdcMem = CreateCompatibleDC(NULL);
 227
 228         // create a mono bitmap of the standard size
 229         int x = GetSystemMetrics(SM_CXMENUCHECK);
 230         int y = GetSystemMetrics(SM_CYMENUCHECK);
 231         wxImageList imagelistCheckboxes(x, y, FALSE, 2);
 232         HBITMAP hbmpCheck = CreateBitmap(x, y,   // bitmap size
 233                                          1,      // # of color planes
 234                                          1,      // # bits needed for one pixel
 235                                          0);     // array containing colour data
 236         SelectObject(hdcMem, hbmpCheck);
 237
 238         // then draw a check mark into it
 239         RECT rect = { 0, 0, x, y };
 240         if ( !::DrawFrameControl(hdcMem, &rect,
 241                                  DFC_BUTTON,
 242                                  DFCS_BUTTONCHECK | DFCS_CHECKED) )
 243         {
 244             wxLogLastError(_T("DrawFrameControl(check)"));
 245         }
 246
 247         bmp.SetHBITMAP((WXHBITMAP)hbmpCheck);
 248         imagelistCheckboxes.Add(bmp);
 249
 250         if ( !::DrawFrameControl(hdcMem, &rect,
 251                                  DFC_BUTTON,
 252                                  DFCS_BUTTONCHECK) )
 253         {
 254             wxLogLastError(_T("DrawFrameControl(uncheck)"));
 255         }
 256
 257         bmp.SetHBITMAP((WXHBITMAP)hbmpCheck);
 258         imagelistCheckboxes.Add(bmp);
 259
 260         // clean up
 261         ::DeleteDC(hdcMem);
 262
 263         // set the imagelist
 264         SetStateImageList(&imagelistCheckboxes);
 265     }
 266 #endif // 0
 267
 268     SetSize(pos.x, pos.y, size.x, size.y);
 269
 270     return TRUE;
 271 }
 272
 273 wxTreeCtrl::~wxTreeCtrl()
 274 {
 275     DeleteTextCtrl();
 276
 277     // delete user data to prevent memory leaks
 278     DeleteAllItems();
 279 }
 280
 281 // ----------------------------------------------------------------------------
 282 // accessors
 283 // ----------------------------------------------------------------------------
 284
 285 // simple wrappers which add error checking in debug mode
 286
 287 bool wxTreeCtrl::DoGetItem(wxTreeViewItem* tvItem) const
 288 {
 289     if ( !TreeView_GetItem(GetHwnd(), tvItem) )
 290     {
 291         wxLogLastError("TreeView_GetItem");
 292
 293         return FALSE;
 294     }
 295
 296     return TRUE;
 297 }
 298
 299 void wxTreeCtrl::DoSetItem(wxTreeViewItem* tvItem)
 300 {
 301     if ( TreeView_SetItem(GetHwnd(), tvItem) == -1 )
 302     {
 303         wxLogLastError("TreeView_SetItem");
 304     }
 305 }
 306
 307 size_t wxTreeCtrl::GetCount() const
 308 {
 309     return (size_t)TreeView_GetCount(GetHwnd());
 310 }
 311
 312 unsigned int wxTreeCtrl::GetIndent() const
 313 {
 314     return TreeView_GetIndent(GetHwnd());
 315 }
 316
 317 void wxTreeCtrl::SetIndent(unsigned int indent)
 318 {
 319     TreeView_SetIndent(GetHwnd(), indent);
 320 }
 321
 322 wxImageList *wxTreeCtrl::GetImageList() const
 323 {
 324     return m_imageListNormal;
 325 }
 326
 327 wxImageList *wxTreeCtrl::GetStateImageList() const
 328 {
 329     return m_imageListNormal;
 330 }
 331
 332 void wxTreeCtrl::SetAnyImageList(wxImageList *imageList, int which)
 333 {
 334     // no error return
 335     TreeView_SetImageList(GetHwnd(),
 336                           imageList ? imageList->GetHIMAGELIST() : 0,
 337                           which);
 338 }
 339
 340 void wxTreeCtrl::SetImageList(wxImageList *imageList)
 341 {
 342     SetAnyImageList(m_imageListNormal = imageList, TVSIL_NORMAL);
 343 }
 344
 345 void wxTreeCtrl::SetStateImageList(wxImageList *imageList)
 346 {
 347     SetAnyImageList(m_imageListState = imageList, TVSIL_STATE);
 348 }
 349
 350 // internal class for counting tree items
 351
 352 class TraverseCounter : public wxTreeTraversal
 353 {
 354 public:
 355         TraverseCounter(const wxTreeCtrl *tree,
 356                         const wxTreeItemId& root,
 357                         bool recursively)
 358             : wxTreeTraversal(tree)
 359             {
 360                 m_count = 0;
 361
 362                 DoTraverse(root, recursively);
 363             }
 364
 365         virtual bool OnVisit(const wxTreeItemId& item)
 366         {
 367             m_count++;
 368
 369             return TRUE;
 370         }
 371
 372         size_t GetCount() const { return m_count; }
 373
 374 private:
 375         size_t m_count;
 376 };
 377
 378
 379 size_t wxTreeCtrl::GetChildrenCount(const wxTreeItemId& item,
 380                                     bool recursively) const
 381 {
 382     TraverseCounter counter(this, item, recursively);
 383
 384     return counter.GetCount();
 385 }
 386
 387 // ----------------------------------------------------------------------------
 388 // Item access
 389 // ----------------------------------------------------------------------------
 390
 391 wxString wxTreeCtrl::GetItemText(const wxTreeItemId& item) const
 392 {
 393     wxChar buf[512];  // the size is arbitrary...
 394
 395     wxTreeViewItem tvItem(item, TVIF_TEXT);
 396     tvItem.pszText = buf;
 397     tvItem.cchTextMax = WXSIZEOF(buf);
 398     if ( !DoGetItem(&tvItem) )
 399     {
 400         // don't return some garbage which was on stack, but an empty string
 401         buf[0] = _T('\0');
 402     }
 403
 404     return wxString(buf);
 405 }
 406
 407 void wxTreeCtrl::SetItemText(const wxTreeItemId& item, const wxString& text)
 408 {
 409     wxTreeViewItem tvItem(item, TVIF_TEXT);
 410     tvItem.pszText = (wxChar *)text.c_str();  // conversion is ok
 411     DoSetItem(&tvItem);
 412 }
 413
 414 void wxTreeCtrl::DoSetItemImages(const wxTreeItemId& item,
 415                                  int image,
 416                                  int imageSel)
 417 {
 418     wxTreeViewItem tvItem(item, TVIF_IMAGE | TVIF_SELECTEDIMAGE);
 419     tvItem.iSelectedImage = imageSel;
 420     tvItem.iImage = image;
 421     DoSetItem(&tvItem);
 422 }
 423
 424 int wxTreeCtrl::GetItemImage(const wxTreeItemId& item) const
 425 {
 426     wxTreeViewItem tvItem(item, TVIF_IMAGE);
 427     DoGetItem(&tvItem);
 428
 429     return tvItem.iImage;
 430 }
 431
 432 void wxTreeCtrl::SetItemImage(const wxTreeItemId& item, int image)
 433 {
 434     // NB: at least in version 5.00.0518.9 of comctl32.dll we need to always
 435     //     change both normal and selected image - otherwise the change simply
 436     //     doesn't take place!
 437     DoSetItemImages(item, image, GetItemSelectedImage(item));
 438 }
 439
 440 int wxTreeCtrl::GetItemSelectedImage(const wxTreeItemId& item) const
 441 {
 442     wxTreeViewItem tvItem(item, TVIF_SELECTEDIMAGE);
 443     DoGetItem(&tvItem);
 444
 445     return tvItem.iSelectedImage;
 446 }
 447
 448 void wxTreeCtrl::SetItemSelectedImage(const wxTreeItemId& item, int image)
 449 {
 450     // NB: at least in version 5.00.0518.9 of comctl32.dll we need to always
 451     //     change both normal and selected image - otherwise the change simply
 452     //     doesn't take place!
 453     DoSetItemImages(item, GetItemImage(item), image);
 454 }
 455
 456 wxTreeItemData *wxTreeCtrl::GetItemData(const wxTreeItemId& item) const
 457 {
 458     wxTreeViewItem tvItem(item, TVIF_PARAM);
 459     if ( !DoGetItem(&tvItem) )
 460     {
 461         return NULL;
 462     }
 463
 464     return (wxTreeItemData *)tvItem.lParam;
 465 }
 466
 467 void wxTreeCtrl::SetItemData(const wxTreeItemId& item, wxTreeItemData *data)
 468 {
 469     wxTreeViewItem tvItem(item, TVIF_PARAM);
 470     tvItem.lParam = (LPARAM)data;
 471     DoSetItem(&tvItem);
 472 }
 473
 474 void wxTreeCtrl::SetItemHasChildren(const wxTreeItemId& item, bool has)
 475 {
 476     wxTreeViewItem tvItem(item, TVIF_CHILDREN);
 477     tvItem.cChildren = (int)has;
 478     DoSetItem(&tvItem);
 479 }
 480
 481 void wxTreeCtrl::SetItemBold(const wxTreeItemId& item, bool bold)
 482 {
 483     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_BOLD);
 484     tvItem.state = bold ? TVIS_BOLD : 0;
 485     DoSetItem(&tvItem);
 486 }
 487
 488 void wxTreeCtrl::SetItemDropHighlight(const wxTreeItemId& item, bool highlight)
 489 {
 490     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_DROPHILITED);
 491     tvItem.state = highlight ? TVIS_DROPHILITED : 0;
 492     DoSetItem(&tvItem);
 493 }
 494
 495 // ----------------------------------------------------------------------------
 496 // Item status
 497 // ----------------------------------------------------------------------------
 498
 499 bool wxTreeCtrl::IsVisible(const wxTreeItemId& item) const
 500 {
 501     // Bug in Gnu-Win32 headers, so don't use the macro TreeView_GetItemRect
 502     RECT rect;
 503     return SendMessage(GetHwnd(), TVM_GETITEMRECT, FALSE, (LPARAM)&rect) != 0;
 504
 505 }
 506
 507 bool wxTreeCtrl::ItemHasChildren(const wxTreeItemId& item) const
 508 {
 509     wxTreeViewItem tvItem(item, TVIF_CHILDREN);
 510     DoGetItem(&tvItem);
 511
 512     return tvItem.cChildren != 0;
 513 }
 514
 515 bool wxTreeCtrl::IsExpanded(const wxTreeItemId& item) const
 516 {
 517     // probably not a good idea to put it here
 518     //wxASSERT( ItemHasChildren(item) );
 519
 520     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_EXPANDED);
 521     DoGetItem(&tvItem);
 522
 523     return (tvItem.state & TVIS_EXPANDED) != 0;
 524 }
 525
 526 bool wxTreeCtrl::IsSelected(const wxTreeItemId& item) const
 527 {
 528     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_SELECTED);
 529     DoGetItem(&tvItem);
 530
 531     return (tvItem.state & TVIS_SELECTED) != 0;
 532 }
 533
 534 bool wxTreeCtrl::IsBold(const wxTreeItemId& item) const
 535 {
 536     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_BOLD);
 537     DoGetItem(&tvItem);
 538
 539     return (tvItem.state & TVIS_BOLD) != 0;
 540 }
 541
 542 // ----------------------------------------------------------------------------
 543 // navigation
 544 // ----------------------------------------------------------------------------
 545
 546 wxTreeItemId wxTreeCtrl::GetRootItem() const
 547 {
 548     return wxTreeItemId((WXHTREEITEM) TreeView_GetRoot(GetHwnd()));
 549 }
 550
 551 wxTreeItemId wxTreeCtrl::GetSelection() const
 552 {
 553     wxCHECK_MSG( !(m_windowStyle & wxTR_MULTIPLE), (WXHTREEITEM)0,
 554                  _T("this only works with single selection controls") );
 555
 556     return wxTreeItemId((WXHTREEITEM) TreeView_GetSelection(GetHwnd()));
 557 }
 558
 559 wxTreeItemId wxTreeCtrl::GetParent(const wxTreeItemId& item) const
 560 {
 561     return wxTreeItemId((WXHTREEITEM) TreeView_GetParent(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item));
 562 }
 563
 564 wxTreeItemId wxTreeCtrl::GetFirstChild(const wxTreeItemId& item,
 565                                        long& _cookie) const
 566 {
 567     // remember the last child returned in 'cookie'
 568     _cookie = (long)TreeView_GetChild(GetHwnd(), (HTREEITEM) (WXHTREEITEM)item);
 569
 570     return wxTreeItemId((WXHTREEITEM)_cookie);
 571 }
 572
 573 wxTreeItemId wxTreeCtrl::GetNextChild(const wxTreeItemId& WXUNUSED(item),
 574                                       long& _cookie) const
 575 {
 576     wxTreeItemId l = wxTreeItemId((WXHTREEITEM)TreeView_GetNextSibling(GetHwnd(),
 577                                    (HTREEITEM)(WXHTREEITEM)_cookie));
 578     _cookie = (long)l;
 579
 580     return l;
 581 }
 582
 583 wxTreeItemId wxTreeCtrl::GetLastChild(const wxTreeItemId& item) const
 584 {
 585     // can this be done more efficiently?
 586     long cookie;
 587
 588     wxTreeItemId childLast,
 589     child = GetFirstChild(item, cookie);
 590     while ( child.IsOk() )
 591     {
 592         childLast = child;
 593         child = GetNextChild(item, cookie);
 594     }
 595
 596     return childLast;
 597 }
 598
 599 wxTreeItemId wxTreeCtrl::GetNextSibling(const wxTreeItemId& item) const
 600 {
 601     return wxTreeItemId((WXHTREEITEM) TreeView_GetNextSibling(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item));
 602 }
 603
 604 wxTreeItemId wxTreeCtrl::GetPrevSibling(const wxTreeItemId& item) const
 605 {
 606     return wxTreeItemId((WXHTREEITEM) TreeView_GetPrevSibling(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item));
 607 }
 608
 609 wxTreeItemId wxTreeCtrl::GetFirstVisibleItem() const
 610 {
 611     return wxTreeItemId((WXHTREEITEM) TreeView_GetFirstVisible(GetHwnd()));
 612 }
 613
 614 wxTreeItemId wxTreeCtrl::GetNextVisible(const wxTreeItemId& item) const
 615 {
 616     wxASSERT_MSG( IsVisible(item), _T("The item you call GetNextVisible() "
 617                                       "for must be visible itself!"));
 618
 619     return wxTreeItemId((WXHTREEITEM) TreeView_GetNextVisible(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item));
 620 }
 621
 622 wxTreeItemId wxTreeCtrl::GetPrevVisible(const wxTreeItemId& item) const
 623 {
 624     wxASSERT_MSG( IsVisible(item), _T("The item you call GetPrevVisible() "
 625                                       "for must be visible itself!"));
 626
 627     return wxTreeItemId((WXHTREEITEM) TreeView_GetPrevVisible(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item));
 628 }
 629
 630 // ----------------------------------------------------------------------------
 631 // multiple selections emulation
 632 // ----------------------------------------------------------------------------
 633
 634 bool wxTreeCtrl::IsItemChecked(const wxTreeItemId& item) const
 635 {
 636     // receive the desired information.
 637     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_STATEIMAGEMASK);
 638     DoGetItem(&tvItem);
 639
 640     // state image indices are 1 based
 641     return ((tvItem.state >> 12) - 1) == 1;
 642 }
 643
 644 void wxTreeCtrl::SetItemCheck(const wxTreeItemId& item, bool check)
 645 {
 646     // receive the desired information.
 647     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_STATEIMAGEMASK);
 648
 649     // state images are one-based
 650     tvItem.state = (check ? 2 : 1) << 12;
 651
 652     DoSetItem(&tvItem);
 653 }
 654
 655 // internal class for getting the selected
 656
 657 class TraverseSelections : public wxTreeTraversal
 658 {
 659 public:
 660         TraverseSelections(const wxTreeCtrl *tree,
 661                            wxArrayTreeItemIds& selections)
 662             : wxTreeTraversal(tree), m_selections(selections)
 663             {
 664                 m_selections.Empty();
 665
 666                 DoTraverse(tree->GetRootItem());
 667             }
 668
 669         virtual bool OnVisit(const wxTreeItemId& item)
 670         {
 671             if ( GetTree()->IsItemChecked(item) )
 672             {
 673                 m_selections.Add(item);
 674             }
 675
 676             return TRUE;
 677         }
 678
 679 private:
 680         wxArrayTreeItemIds& m_selections;
 681 };
 682
 683 size_t wxTreeCtrl::GetSelections(wxArrayTreeItemIds& selections) const
 684 {
 685     TraverseSelections selector(this, selections);
 686
 687     return selections.GetCount();
 688 }
 689
 690 // ----------------------------------------------------------------------------
 691 // Usual operations
 692 // ----------------------------------------------------------------------------
 693
 694 wxTreeItemId wxTreeCtrl::DoInsertItem(const wxTreeItemId& parent,
 695                                       wxTreeItemId hInsertAfter,
 696                                       const wxString& text,
 697                                       int image, int selectedImage,
 698                                       wxTreeItemData *data)
 699 {
 700     TV_INSERTSTRUCT tvIns;
 701     tvIns.hParent = (HTREEITEM) (WXHTREEITEM)parent;
 702     tvIns.hInsertAfter = (HTREEITEM) (WXHTREEITEM) hInsertAfter;
 703
 704     // This is how we insert the item as the first child: supply a NULL hInsertAfter
 705     if (tvIns.hInsertAfter == (HTREEITEM) 0)
 706     {
 707         tvIns.hInsertAfter = TVI_FIRST;
 708     }
 709
 710     UINT mask = 0;
 711     if ( !text.IsEmpty() )
 712     {
 713         mask |= TVIF_TEXT;
 714         tvIns.item.pszText = (wxChar *)text.c_str();  // cast is ok
 715     }
 716
 717     if ( image != -1 )
 718     {
 719         mask |= TVIF_IMAGE;
 720         tvIns.item.iImage = image;
 721
 722         if ( selectedImage == -1 )
 723         {
 724             // take the same image for selected icon if not specified
 725             selectedImage = image;
 726         }
 727     }
 728
 729     if ( selectedImage != -1 )
 730     {
 731         mask |= TVIF_SELECTEDIMAGE;
 732         tvIns.item.iSelectedImage = selectedImage;
 733     }
 734
 735     if ( data != NULL )
 736     {
 737         mask |= TVIF_PARAM;
 738         tvIns.item.lParam = (LPARAM)data;
 739     }
 740
 741     tvIns.item.mask = mask;
 742
 743     HTREEITEM id = (HTREEITEM) TreeView_InsertItem(GetHwnd(), &tvIns);
 744     if ( id == 0 )
 745     {
 746         wxLogLastError("TreeView_InsertItem");
 747     }
 748
 749     if ( data != NULL )
 750     {
 751         // associate the application tree item with Win32 tree item handle
 752         data->SetId((WXHTREEITEM)id);
 753     }
 754
 755     return wxTreeItemId((WXHTREEITEM)id);
 756 }
 757
 758 // for compatibility only
 759 wxTreeItemId wxTreeCtrl::InsertItem(const wxTreeItemId& parent,
 760                                     const wxString& text,
 761                                     int image, int selImage,
 762                                     long insertAfter)
 763 {
 764     return DoInsertItem(parent, (WXHTREEITEM)insertAfter, text,
 765                         image, selImage, NULL);
 766 }
 767
 768 wxTreeItemId wxTreeCtrl::AddRoot(const wxString& text,
 769                                  int image, int selectedImage,
 770                                  wxTreeItemData *data)
 771 {
 772     return DoInsertItem(wxTreeItemId((WXHTREEITEM) 0), (WXHTREEITEM) 0,
 773                         text, image, selectedImage, data);
 774 }
 775
 776 wxTreeItemId wxTreeCtrl::PrependItem(const wxTreeItemId& parent,
 777                                      const wxString& text,
 778                                      int image, int selectedImage,
 779                                      wxTreeItemData *data)
 780 {
 781     return DoInsertItem(parent, (WXHTREEITEM) TVI_FIRST,
 782                         text, image, selectedImage, data);
 783 }
 784
 785 wxTreeItemId wxTreeCtrl::InsertItem(const wxTreeItemId& parent,
 786                                     const wxTreeItemId& idPrevious,
 787                                     const wxString& text,
 788                                     int image, int selectedImage,
 789                                     wxTreeItemData *data)
 790 {
 791     return DoInsertItem(parent, idPrevious, text, image, selectedImage, data);
 792 }
 793
 794 wxTreeItemId wxTreeCtrl::AppendItem(const wxTreeItemId& parent,
 795                                     const wxString& text,
 796                                     int image, int selectedImage,
 797                                     wxTreeItemData *data)
 798 {
 799     return DoInsertItem(parent, (WXHTREEITEM) TVI_LAST,
 800                         text, image, selectedImage, data);
 801 }
 802
 803 void wxTreeCtrl::Delete(const wxTreeItemId& item)
 804 {
 805     if ( !TreeView_DeleteItem(GetHwnd(), (HTREEITEM)(WXHTREEITEM)item) )
 806     {
 807         wxLogLastError("TreeView_DeleteItem");
 808     }
 809 }
 810
 811 // delete all children (but don't delete the item itself)
 812 void wxTreeCtrl::DeleteChildren(const wxTreeItemId& item)
 813 {
 814     long cookie;
 815
 816     wxArrayLong children;
 817     wxTreeItemId child = GetFirstChild(item, cookie);
 818     while ( child.IsOk() )
 819     {
 820         children.Add((long)(WXHTREEITEM)child);
 821
 822         child = GetNextChild(item, cookie);
 823     }
 824
 825     size_t nCount = children.Count();
 826     for ( size_t n = 0; n < nCount; n++ )
 827     {
 828         if ( !TreeView_DeleteItem(GetHwnd(), (HTREEITEM)children[n]) )
 829         {
 830             wxLogLastError("TreeView_DeleteItem");
 831         }
 832     }
 833 }
 834
 835 void wxTreeCtrl::DeleteAllItems()
 836 {
 837     if ( !TreeView_DeleteAllItems(GetHwnd()) )
 838     {
 839         wxLogLastError("TreeView_DeleteAllItems");
 840     }
 841 }
 842
 843 void wxTreeCtrl::DoExpand(const wxTreeItemId& item, int flag)
 844 {
 845     wxASSERT_MSG( flag == TVE_COLLAPSE ||
 846                   flag == (TVE_COLLAPSE | TVE_COLLAPSERESET) ||
 847                   flag == TVE_EXPAND   ||
 848                   flag == TVE_TOGGLE,
 849                   _T("Unknown flag in wxTreeCtrl::DoExpand") );
 850
 851     // TreeView_Expand doesn't send TVN_ITEMEXPAND(ING) messages, so we must
 852     // emulate them. This behaviour has changed slightly with comctl32.dll
 853     // v 4.70 - now it does send them but only the first time. To maintain
 854     // compatible behaviour and also in order to not have surprises with the
 855     // future versions, don't rely on this and still do everything ourselves.
 856     // To avoid that the messages be sent twice when the item is expanded for
 857     // the first time we must clear TVIS_EXPANDEDONCE style manually.
 858
 859     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_EXPANDEDONCE);
 860     tvItem.state = 0;
 861     DoSetItem(&tvItem);
 862
 863     if ( TreeView_Expand(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item, flag) != 0 )
 864     {
 865         wxTreeEvent event(wxEVT_NULL, m_windowId);
 866         event.m_item = item;
 867
 868         bool isExpanded = IsExpanded(item);
 869
 870         event.SetEventObject(this);
 871
 872         // FIXME return value of {EXPAND|COLLAPS}ING event handler is discarded
 873         event.SetEventType(g_events[isExpanded][TRUE]);
 874         GetEventHandler()->ProcessEvent(event);
 875
 876         event.SetEventType(g_events[isExpanded][FALSE]);
 877         GetEventHandler()->ProcessEvent(event);
 878     }
 879     //else: change didn't took place, so do nothing at all
 880 }
 881
 882 void wxTreeCtrl::Expand(const wxTreeItemId& item)
 883 {
 884     DoExpand(item, TVE_EXPAND);
 885 }
 886
 887 void wxTreeCtrl::Collapse(const wxTreeItemId& item)
 888 {
 889     DoExpand(item, TVE_COLLAPSE);
 890 }
 891
 892 void wxTreeCtrl::CollapseAndReset(const wxTreeItemId& item)
 893 {
 894     DoExpand(item, TVE_COLLAPSE | TVE_COLLAPSERESET);
 895 }
 896
 897 void wxTreeCtrl::Toggle(const wxTreeItemId& item)
 898 {
 899     DoExpand(item, TVE_TOGGLE);
 900 }
 901
 902 void wxTreeCtrl::ExpandItem(const wxTreeItemId& item, int action)
 903 {
 904     DoExpand(item, action);
 905 }
 906
 907 void wxTreeCtrl::Unselect()
 908 {
 909     wxASSERT_MSG( !(m_windowStyle & wxTR_MULTIPLE), _T("doesn't make sense") );
 910
 911     // just remove the selection
 912     SelectItem(wxTreeItemId((WXHTREEITEM) 0));
 913 }
 914
 915 void wxTreeCtrl::UnselectAll()
 916 {
 917     if ( m_windowStyle & wxTR_MULTIPLE )
 918     {
 919         wxArrayTreeItemIds selections;
 920         size_t count = GetSelections(selections);
 921         for ( size_t n = 0; n < count; n++ )
 922         {
 923             SetItemCheck(selections[n], FALSE);
 924         }
 925     }
 926     else
 927     {
 928         // just remove the selection
 929         Unselect();
 930     }
 931 }
 932
 933 void wxTreeCtrl::SelectItem(const wxTreeItemId& item)
 934 {
 935     if ( m_windowStyle & wxTR_MULTIPLE )
 936     {
 937         // selecting the item means checking it
 938         SetItemCheck(item);
 939     }
 940     else
 941     {
 942         // inspite of the docs (MSDN Jan 99 edition), we don't seem to receive
 943         // the notification from the control (i.e. TVN_SELCHANG{ED|ING}), so
 944         // send them ourselves
 945
 946         wxTreeEvent event(wxEVT_NULL, m_windowId);
 947         event.m_item = item;
 948         event.SetEventObject(this);
 949
 950         event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGING);
 951         if ( !GetEventHandler()->ProcessEvent(event) || event.IsAllowed() )
 952         {
 953             if ( !TreeView_SelectItem(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item) )
 954             {
 955                 wxLogLastError("TreeView_SelectItem");
 956             }
 957             else
 958             {
 959                 event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGED);
 960                 (void)GetEventHandler()->ProcessEvent(event);
 961             }
 962         }
 963         //else: program vetoed the change
 964     }
 965 }
 966
 967 void wxTreeCtrl::EnsureVisible(const wxTreeItemId& item)
 968 {
 969     // no error return
 970     TreeView_EnsureVisible(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item);
 971 }
 972
 973 void wxTreeCtrl::ScrollTo(const wxTreeItemId& item)
 974 {
 975     if ( !TreeView_SelectSetFirstVisible(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item) )
 976     {
 977         wxLogLastError("TreeView_SelectSetFirstVisible");
 978     }
 979 }
 980
 981 wxTextCtrl* wxTreeCtrl::GetEditControl() const
 982 {
 983     return m_textCtrl;
 984 }
 985
 986 void wxTreeCtrl::DeleteTextCtrl()
 987 {
 988     if ( m_textCtrl )
 989     {
 990         m_textCtrl->UnsubclassWin();
 991         m_textCtrl->SetHWND(0);
 992         delete m_textCtrl;
 993         m_textCtrl = NULL;
 994     }
 995 }
 996
 997 wxTextCtrl* wxTreeCtrl::EditLabel(const wxTreeItemId& item,
 998                                   wxClassInfo* textControlClass)
 999 {
1000     wxASSERT( textControlClass->IsKindOf(CLASSINFO(wxTextCtrl)) );
1001
1002     HWND hWnd = (HWND) TreeView_EditLabel(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item);
1003
1004     // this is not an error - the TVN_BEGINLABELEDIT handler might have
1005     // returned FALSE
1006     if ( !hWnd )
1007     {
1008         return NULL;
1009     }
1010
1011     DeleteTextCtrl();
1012
1013     m_textCtrl = (wxTextCtrl *)textControlClass->CreateObject();
1014     m_textCtrl->SetHWND((WXHWND)hWnd);
1015     m_textCtrl->SubclassWin((WXHWND)hWnd);
1016
1017     return m_textCtrl;
1018 }
1019
1020 // End label editing, optionally cancelling the edit
1021 void wxTreeCtrl::EndEditLabel(const wxTreeItemId& item, bool discardChanges)
1022 {
1023     TreeView_EndEditLabelNow(GetHwnd(), discardChanges);
1024
1025     DeleteTextCtrl();
1026 }
1027
1028 wxTreeItemId wxTreeCtrl::HitTest(const wxPoint& point, int& flags)
1029 {
1030     TV_HITTESTINFO hitTestInfo;
1031     hitTestInfo.pt.x = (int)point.x;
1032     hitTestInfo.pt.y = (int)point.y;
1033
1034     TreeView_HitTest(GetHwnd(), &hitTestInfo);
1035
1036     flags = 0;
1037
1038     // avoid repetition
1039     #define TRANSLATE_FLAG(flag) if ( hitTestInfo.flags & TVHT_##flag ) \
1040                                     flags |= wxTREE_HITTEST_##flag
1041
1042     TRANSLATE_FLAG(ABOVE);
1043     TRANSLATE_FLAG(BELOW);
1044     TRANSLATE_FLAG(NOWHERE);
1045     TRANSLATE_FLAG(ONITEMBUTTON);
1046     TRANSLATE_FLAG(ONITEMICON);
1047     TRANSLATE_FLAG(ONITEMINDENT);
1048     TRANSLATE_FLAG(ONITEMLABEL);
1049     TRANSLATE_FLAG(ONITEMRIGHT);
1050     TRANSLATE_FLAG(ONITEMSTATEICON);
1051     TRANSLATE_FLAG(TOLEFT);
1052     TRANSLATE_FLAG(TORIGHT);
1053
1054     #undef TRANSLATE_FLAG
1055
1056     return wxTreeItemId((WXHTREEITEM) hitTestInfo.hItem);
1057 }
1058
1059 bool wxTreeCtrl::GetBoundingRect(const wxTreeItemId& item,
1060                                  wxRect& rect,
1061                                  bool textOnly) const
1062 {
1063     RECT rc;
1064     if ( TreeView_GetItemRect(GetHwnd(), (HTREEITEM)(WXHTREEITEM)item,
1065                               &rc, textOnly) )
1066     {
1067         rect = wxRect(wxPoint(rc.left, rc.top), wxPoint(rc.right, rc.bottom));
1068
1069         return TRUE;
1070     }
1071     else
1072     {
1073         // couldn't retrieve rect: for example, item isn't visible
1074         return FALSE;
1075     }
1076 }
1077
1078 // ----------------------------------------------------------------------------
1079 // sorting stuff
1080 // ----------------------------------------------------------------------------
1081
1082 static int CALLBACK TreeView_CompareCallback(wxTreeItemData *pItem1,
1083                                              wxTreeItemData *pItem2,
1084                                              wxTreeCtrl *tree)
1085 {
1086     wxCHECK_MSG( pItem1 && pItem2, 0,
1087                  _T("sorting tree without data doesn't make sense") );
1088
1089     return tree->OnCompareItems(pItem1->GetId(), pItem2->GetId());
1090 }
1091
1092 int wxTreeCtrl::OnCompareItems(const wxTreeItemId& item1,
1093                                const wxTreeItemId& item2)
1094 {
1095     return wxStrcmp(GetItemText(item1), GetItemText(item2));
1096 }
1097
1098 void wxTreeCtrl::SortChildren(const wxTreeItemId& item)
1099 {
1100     // rely on the fact that TreeView_SortChildren does the same thing as our
1101     // default behaviour, i.e. sorts items alphabetically and so call it
1102     // directly if we're not in derived class (much more efficient!)
1103     if ( GetClassInfo() == CLASSINFO(wxTreeCtrl) )
1104     {
1105         TreeView_SortChildren(GetHwnd(), (HTREEITEM)(WXHTREEITEM)item, 0);
1106     }
1107     else
1108     {
1109         TV_SORTCB tvSort;
1110         tvSort.hParent = (HTREEITEM)(WXHTREEITEM)item;
1111         tvSort.lpfnCompare = (PFNTVCOMPARE)TreeView_CompareCallback;
1112         tvSort.lParam = (LPARAM)this;
1113         TreeView_SortChildrenCB(GetHwnd(), &tvSort, 0 /* reserved */);
1114     }
1115 }
1116
1117 // ----------------------------------------------------------------------------
1118 // implementation
1119 // ----------------------------------------------------------------------------
1120
1121 bool wxTreeCtrl::MSWCommand(WXUINT cmd, WXWORD id)
1122 {
1123     if ( cmd == EN_UPDATE )
1124     {
1125         wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, id);
1126         event.SetEventObject( this );
1127         ProcessCommand(event);
1128     }
1129     else if ( cmd == EN_KILLFOCUS )
1130     {
1131         wxCommandEvent event(wxEVT_KILL_FOCUS, id);
1132         event.SetEventObject( this );
1133         ProcessCommand(event);
1134     }
1135     else
1136     {
1137         // nothing done
1138         return FALSE;
1139     }
1140
1141     // command processed
1142     return TRUE;
1143 }
1144
1145 // process WM_NOTIFY Windows message
1146 bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1147 {
1148     wxTreeEvent event(wxEVT_NULL, m_windowId);
1149     wxEventType eventType = wxEVT_NULL;
1150     NMHDR *hdr = (NMHDR *)lParam;
1151
1152     switch ( hdr->code )
1153     {
1154         case TVN_BEGINDRAG:
1155             eventType = wxEVT_COMMAND_TREE_BEGIN_DRAG;
1156             // fall through
1157
1158         case TVN_BEGINRDRAG:
1159             {
1160                 if ( eventType == wxEVT_NULL )
1161                     eventType = wxEVT_COMMAND_TREE_BEGIN_RDRAG;
1162                 //else: left drag, already set above
1163
1164                 NM_TREEVIEW *tv = (NM_TREEVIEW *)lParam;
1165
1166                 event.m_item = (WXHTREEITEM) tv->itemNew.hItem;
1167                 event.m_pointDrag = wxPoint(tv->ptDrag.x, tv->ptDrag.y);
1168                 break;
1169             }
1170
1171         case TVN_BEGINLABELEDIT:
1172             {
1173                 eventType = wxEVT_COMMAND_TREE_BEGIN_LABEL_EDIT;
1174                 TV_DISPINFO *info = (TV_DISPINFO *)lParam;
1175
1176                 event.m_item = (WXHTREEITEM) info->item.hItem;
1177                 event.m_label = info->item.pszText;
1178                 break;
1179             }
1180
1181         case TVN_DELETEITEM:
1182             {
1183                 eventType = wxEVT_COMMAND_TREE_DELETE_ITEM;
1184                 NM_TREEVIEW *tv = (NM_TREEVIEW *)lParam;
1185
1186                 event.m_item = (WXHTREEITEM) tv->itemOld.hItem;
1187                 break;
1188             }
1189
1190         case TVN_ENDLABELEDIT:
1191             {
1192                 eventType = wxEVT_COMMAND_TREE_END_LABEL_EDIT;
1193                 TV_DISPINFO *info = (TV_DISPINFO *)lParam;
1194
1195                 event.m_item = (WXHTREEITEM)info->item.hItem;
1196                 event.m_label = info->item.pszText;
1197                 break;
1198             }
1199
1200         case TVN_GETDISPINFO:
1201             eventType = wxEVT_COMMAND_TREE_GET_INFO;
1202             // fall through
1203
1204         case TVN_SETDISPINFO:
1205             {
1206                 if ( eventType == wxEVT_NULL )
1207                     eventType = wxEVT_COMMAND_TREE_SET_INFO;
1208                 //else: get, already set above
1209
1210                 TV_DISPINFO *info = (TV_DISPINFO *)lParam;
1211
1212                 event.m_item = (WXHTREEITEM) info->item.hItem;
1213                 break;
1214             }
1215
1216         case TVN_ITEMEXPANDING:
1217             event.m_code = FALSE;
1218             // fall through
1219
1220         case TVN_ITEMEXPANDED:
1221             {
1222                 NM_TREEVIEW* tv = (NM_TREEVIEW*)lParam;
1223
1224                 bool expand = FALSE;
1225                 switch ( tv->action )
1226                 {
1227                     case TVE_EXPAND:
1228                         expand = TRUE;
1229                         break;
1230
1231                     case TVE_COLLAPSE:
1232                         expand = FALSE;
1233                         break;
1234
1235                     default:
1236                         wxLogDebug(_T("unexpected code %d in TVN_ITEMEXPAND "
1237                                       "message"), tv->action);
1238                 }
1239
1240                 bool ing = (hdr->code == TVN_ITEMEXPANDING);
1241                 eventType = g_events[expand][ing];
1242
1243                 event.m_item = (WXHTREEITEM) tv->itemNew.hItem;
1244                 break;
1245             }
1246
1247         case TVN_KEYDOWN:
1248             {
1249                 eventType = wxEVT_COMMAND_TREE_KEY_DOWN;
1250                 TV_KEYDOWN *info = (TV_KEYDOWN *)lParam;
1251
1252                 event.m_code = wxCharCodeMSWToWX(info->wVKey);
1253
1254                 // a separate event for this case
1255                 if ( info->wVKey == VK_SPACE || info->wVKey == VK_RETURN )
1256                 {
1257                     wxTreeEvent event2(wxEVT_COMMAND_TREE_ITEM_ACTIVATED,
1258                                        m_windowId);
1259                     event2.SetEventObject(this);
1260
1261                     GetEventHandler()->ProcessEvent(event2);
1262                 }
1263                 break;
1264             }
1265
1266         case TVN_SELCHANGED:
1267             eventType = wxEVT_COMMAND_TREE_SEL_CHANGED;
1268             // fall through
1269
1270         case TVN_SELCHANGING:
1271             {
1272                 if ( eventType == wxEVT_NULL )
1273                     eventType = wxEVT_COMMAND_TREE_SEL_CHANGING;
1274                 //else: already set above
1275
1276                 NM_TREEVIEW* tv = (NM_TREEVIEW *)lParam;
1277
1278                 event.m_item = (WXHTREEITEM) tv->itemNew.hItem;
1279                 event.m_itemOld = (WXHTREEITEM) tv->itemOld.hItem;
1280                 break;
1281             }
1282
1283         default:
1284             return wxControl::MSWOnNotify(idCtrl, lParam, result);
1285     }
1286
1287     event.SetEventObject(this);
1288     event.SetEventType(eventType);
1289
1290     bool processed = GetEventHandler()->ProcessEvent(event);
1291
1292     // post processing
1293     switch ( hdr->code )
1294     {
1295         case TVN_DELETEITEM:
1296             {
1297                 // NB: we might process this message using wxWindows event
1298                 //     tables, but due to overhead of wxWin event system we
1299                 //     prefer to do it here ourself (otherwise deleting a tree
1300                 //     with many items is just too slow)
1301                 NM_TREEVIEW* tv = (NM_TREEVIEW *)lParam;
1302                 wxTreeItemData *data = (wxTreeItemData *)tv->itemOld.lParam;
1303                 delete data; // may be NULL, ok
1304
1305                 processed = TRUE; // Make sure we don't get called twice
1306             }
1307             break;
1308
1309         case TVN_BEGINLABELEDIT:
1310             // return TRUE to cancel label editing
1311             *result = !event.IsAllowed();
1312             break;
1313
1314         case TVN_ENDLABELEDIT:
1315             // return TRUE to set the label to the new string
1316             *result = event.IsAllowed();
1317
1318             // ensure that we don't have the text ctrl which is going to be
1319             // deleted any more
1320             DeleteTextCtrl();
1321             break;
1322
1323         case TVN_SELCHANGING:
1324         case TVN_ITEMEXPANDING:
1325             // return TRUE to prevent the action from happening
1326             *result = !event.IsAllowed();
1327             break;
1328
1329         //default:
1330             // for the other messages the return value is ignored and there is
1331             // nothing special to do
1332     }
1333
1334     return processed;
1335 }
1336
1337 // ----------------------------------------------------------------------------
1338 // Tree event
1339 // ----------------------------------------------------------------------------
1340
1341 IMPLEMENT_DYNAMIC_CLASS(wxTreeEvent, wxNotifyEvent)
1342
1343 wxTreeEvent::wxTreeEvent(wxEventType commandType, int id)
1344            : wxNotifyEvent(commandType, id)
1345 {
1346     m_code = 0;
1347     m_itemOld = 0;
1348 }
1349
1350 #endif // __WIN95__
1351