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/msw/private.h"
  31
  32 // Set this to 1 to be _absolutely_ sure that repainting will work for all comctl32.dll versions
  33 #define wxUSE_COMCTL32_SAFELY 0
  34
  35 // Mingw32 is a bit mental even though this is done in winundef
  36 #ifdef GetFirstChild
  37     #undef GetFirstChild
  38 #endif
  39
  40 #ifdef GetNextSibling
  41     #undef GetNextSibling
  42 #endif
  43
  44 #if defined(__WIN95__)
  45
  46 #include "wx/log.h"
  47 #include "wx/dynarray.h"
  48 #include "wx/imaglist.h"
  49 #include "wx/settings.h"
  50 #include "wx/msw/treectrl.h"
  51 #include "wx/msw/dragimag.h"
  52
  53 #ifdef __GNUWIN32_OLD__
  54     #include "wx/msw/gnuwin32/extra.h"
  55 #endif
  56
  57 #if defined(__WIN95__) && !(defined(__GNUWIN32_OLD__) || defined(__TWIN32__))
  58     #include <commctrl.h>
  59 #endif
  60
  61 // Bug in headers, sometimes
  62 #ifndef TVIS_FOCUSED
  63     #define TVIS_FOCUSED            0x0001
  64 #endif
  65
  66 #ifndef TV_FIRST
  67     #define TV_FIRST                0x1100
  68 #endif
  69
  70 #ifndef TVS_CHECKBOXES
  71     #define TVS_CHECKBOXES          0x0100
  72 #endif
  73
  74 // old headers might miss these messages (comctl32.dll 4.71+ only)
  75 #ifndef TVM_SETBKCOLOR
  76     #define TVM_SETBKCOLOR          (TV_FIRST + 29)
  77     #define TVM_SETTEXTCOLOR        (TV_FIRST + 30)
  78 #endif
  79
  80 // a macro to hide the ugliness of nested casts
  81 #define HITEM(item)     (HTREEITEM)(WXHTREEITEM)(item)
  82
  83 // the native control doesn't support multiple selections under MSW and we
  84 // have 2 ways to emulate them: either using TVS_CHECKBOXES style and let
  85 // checkboxes be the selection status (checked == selected) or by really
  86 // emulating everything, i.e. intercepting mouse and key events &c. The first
  87 // approach is much easier but doesn't work with comctl32.dll < 4.71 and also
  88 // looks quite ugly.
  89 #define wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE 0
  90
  91 // ----------------------------------------------------------------------------
  92 // private functions
  93 // ----------------------------------------------------------------------------
  94
  95 // wrapper for TreeView_HitTest
  96 static HTREEITEM GetItemFromPoint(HWND hwndTV, int x, int y)
  97 {
  98     TV_HITTESTINFO tvht;
  99     tvht.pt.x = x;
 100     tvht.pt.y = y;
 101
 102     return (HTREEITEM)TreeView_HitTest(hwndTV, &tvht);
 103 }
 104
 105 #if !wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE
 106
 107 // wrappers for TreeView_GetItem/TreeView_SetItem
 108 static bool IsItemSelected(HWND hwndTV, HTREEITEM hItem)
 109 {
 110     TV_ITEM tvi;
 111     tvi.mask = TVIF_STATE | TVIF_HANDLE;
 112     tvi.stateMask = TVIS_SELECTED;
 113     tvi.hItem = hItem;
 114
 115     if ( !TreeView_GetItem(hwndTV, &tvi) )
 116     {
 117         wxLogLastError(wxT("TreeView_GetItem"));
 118     }
 119
 120     return (tvi.state & TVIS_SELECTED) != 0;
 121 }
 122
 123 static void SelectItem(HWND hwndTV, HTREEITEM hItem, bool select = TRUE)
 124 {
 125     TV_ITEM tvi;
 126     tvi.mask = TVIF_STATE | TVIF_HANDLE;
 127     tvi.stateMask = TVIS_SELECTED;
 128     tvi.state = select ? TVIS_SELECTED : 0;
 129     tvi.hItem = hItem;
 130
 131     if ( TreeView_SetItem(hwndTV, &tvi) == -1 )
 132     {
 133         wxLogLastError(wxT("TreeView_SetItem"));
 134     }
 135 }
 136
 137 static inline void UnselectItem(HWND hwndTV, HTREEITEM htItem)
 138 {
 139     SelectItem(hwndTV, htItem, FALSE);
 140 }
 141
 142 static inline void ToggleItemSelection(HWND hwndTV, HTREEITEM htItem)
 143 {
 144     SelectItem(hwndTV, htItem, !IsItemSelected(hwndTV, htItem));
 145 }
 146
 147 // helper function which selects all items in a range and, optionally,
 148 // unselects all others
 149 static void SelectRange(HWND hwndTV,
 150                         HTREEITEM htFirst,
 151                         HTREEITEM htLast,
 152                         bool unselectOthers = TRUE)
 153 {
 154     // find the first (or last) item and select it
 155     bool cont = TRUE;
 156     HTREEITEM htItem = (HTREEITEM)TreeView_GetRoot(hwndTV);
 157     while ( htItem && cont )
 158     {
 159         if ( (htItem == htFirst) || (htItem == htLast) )
 160         {
 161             if ( !IsItemSelected(hwndTV, htItem) )
 162             {
 163                 SelectItem(hwndTV, htItem);
 164             }
 165
 166             cont = FALSE;
 167         }
 168         else
 169         {
 170             if ( unselectOthers && IsItemSelected(hwndTV, htItem) )
 171             {
 172                 UnselectItem(hwndTV, htItem);
 173             }
 174         }
 175
 176         htItem = (HTREEITEM)TreeView_GetNextVisible(hwndTV, htItem);
 177     }
 178
 179     // select the items in range
 180     cont = htFirst != htLast;
 181     while ( htItem && cont )
 182     {
 183         if ( !IsItemSelected(hwndTV, htItem) )
 184         {
 185             SelectItem(hwndTV, htItem);
 186         }
 187
 188         cont = (htItem != htFirst) && (htItem != htLast);
 189
 190         htItem = (HTREEITEM)TreeView_GetNextVisible(hwndTV, htItem);
 191     }
 192
 193     // unselect the rest
 194     if ( unselectOthers )
 195     {
 196         while ( htItem )
 197         {
 198             if ( IsItemSelected(hwndTV, htItem) )
 199             {
 200                 UnselectItem(hwndTV, htItem);
 201             }
 202
 203             htItem = (HTREEITEM)TreeView_GetNextVisible(hwndTV, htItem);
 204         }
 205     }
 206
 207     // seems to be necessary - otherwise the just selected items don't always
 208     // appear as selected
 209     UpdateWindow(hwndTV);
 210 }
 211
 212 // helper function which tricks the standard control into changing the focused
 213 // item without changing anything else (if someone knows why Microsoft doesn't
 214 // allow to do it by just setting TVIS_FOCUSED flag, please tell me!)
 215 static void SetFocus(HWND hwndTV, HTREEITEM htItem)
 216 {
 217     // the current focus
 218     HTREEITEM htFocus = (HTREEITEM)TreeView_GetSelection(hwndTV);
 219
 220     if ( htItem )
 221     {
 222         // set the focus
 223         if ( htItem != htFocus )
 224         {
 225             // remember the selection state of the item
 226             bool wasSelected = IsItemSelected(hwndTV, htItem);
 227
 228             if ( htFocus && IsItemSelected(hwndTV, htFocus) )
 229             {
 230                 // prevent the tree from unselecting the old focus which it
 231                 // would do by default (TreeView_SelectItem unselects the
 232                 // focused item)
 233                 TreeView_SelectItem(hwndTV, 0);
 234                 SelectItem(hwndTV, htFocus);
 235             }
 236
 237             TreeView_SelectItem(hwndTV, htItem);
 238
 239             if ( !wasSelected )
 240             {
 241                 // need to clear the selection which TreeView_SelectItem() gave
 242                 // us
 243                 UnselectItem(hwndTV, htItem);
 244             }
 245             //else: was selected, still selected - ok
 246         }
 247         //else: nothing to do, focus already there
 248     }
 249     else
 250     {
 251         if ( htFocus )
 252         {
 253             bool wasFocusSelected = IsItemSelected(hwndTV, htFocus);
 254
 255             // just clear the focus
 256             TreeView_SelectItem(hwndTV, 0);
 257
 258             if ( wasFocusSelected )
 259             {
 260                 // restore the selection state
 261                 SelectItem(hwndTV, htFocus);
 262             }
 263         }
 264         //else: nothing to do, no focus already
 265     }
 266 }
 267
 268 #endif // wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE
 269
 270 // ----------------------------------------------------------------------------
 271 // private classes
 272 // ----------------------------------------------------------------------------
 273
 274 // a convenient wrapper around TV_ITEM struct which adds a ctor
 275 #ifdef __VISUALC__
 276 #pragma warning( disable : 4097 ) // inheriting from typedef
 277 #endif
 278
 279 struct wxTreeViewItem : public TV_ITEM
 280 {
 281     wxTreeViewItem(const wxTreeItemId& item,    // the item handle
 282                    UINT mask_,                  // fields which are valid
 283                    UINT stateMask_ = 0)         // for TVIF_STATE only
 284     {
 285         // hItem member is always valid
 286         mask = mask_ | TVIF_HANDLE;
 287         stateMask = stateMask_;
 288         hItem = HITEM(item);
 289     }
 290 };
 291
 292 #ifdef __VISUALC__
 293 #pragma warning( default : 4097 )
 294 #endif
 295
 296 // a class which encapsulates the tree traversal logic: it vists all (unless
 297 // OnVisit() returns FALSE) items under the given one
 298 class wxTreeTraversal
 299 {
 300 public:
 301     wxTreeTraversal(const wxTreeCtrl *tree)
 302     {
 303         m_tree = tree;
 304     }
 305
 306     // do traverse the tree: visit all items (recursively by default) under the
 307     // given one; return TRUE if all items were traversed or FALSE if the
 308     // traversal was aborted because OnVisit returned FALSE
 309     bool DoTraverse(const wxTreeItemId& root, bool recursively = TRUE);
 310
 311     // override this function to do whatever is needed for each item, return
 312     // FALSE to stop traversing
 313     virtual bool OnVisit(const wxTreeItemId& item) = 0;
 314
 315 protected:
 316     const wxTreeCtrl *GetTree() const { return m_tree; }
 317
 318 private:
 319     bool Traverse(const wxTreeItemId& root, bool recursively);
 320
 321     const wxTreeCtrl *m_tree;
 322 };
 323
 324 // internal class for getting the selected items
 325 class TraverseSelections : public wxTreeTraversal
 326 {
 327 public:
 328     TraverseSelections(const wxTreeCtrl *tree,
 329                        wxArrayTreeItemIds& selections)
 330         : wxTreeTraversal(tree), m_selections(selections)
 331         {
 332             m_selections.Empty();
 333
 334             DoTraverse(tree->GetRootItem());
 335         }
 336
 337     virtual bool OnVisit(const wxTreeItemId& item)
 338     {
 339 #if wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE
 340         if ( GetTree()->IsItemChecked(item) )
 341 #else
 342         if ( ::IsItemSelected(GetHwndOf(GetTree()), HITEM(item)) )
 343 #endif
 344         {
 345             m_selections.Add(item);
 346         }
 347
 348         return TRUE;
 349     }
 350
 351     size_t GetCount() const { return m_selections.GetCount(); }
 352
 353 private:
 354     wxArrayTreeItemIds& m_selections;
 355 };
 356
 357 // internal class for counting tree items
 358 class TraverseCounter : public wxTreeTraversal
 359 {
 360 public:
 361     TraverseCounter(const wxTreeCtrl *tree,
 362                     const wxTreeItemId& root,
 363                     bool recursively)
 364         : wxTreeTraversal(tree)
 365         {
 366             m_count = 0;
 367
 368             DoTraverse(root, recursively);
 369         }
 370
 371     virtual bool OnVisit(const wxTreeItemId& item)
 372     {
 373         m_count++;
 374
 375         return TRUE;
 376     }
 377
 378     size_t GetCount() const { return m_count; }
 379
 380 private:
 381     size_t m_count;
 382 };
 383
 384 // ----------------------------------------------------------------------------
 385 // This class is needed for support of different images: the Win32 common
 386 // control natively supports only 2 images (the normal one and another for the
 387 // selected state). We wish to provide support for 2 more of them for folder
 388 // items (i.e. those which have children): for expanded state and for expanded
 389 // selected state. For this we use this structure to store the additional items
 390 // images.
 391 //
 392 // There is only one problem with this: when we retrieve the item's data, we
 393 // don't know whether we get a pointer to wxTreeItemData or
 394 // wxTreeItemIndirectData. So we have to maintain a list of all items which
 395 // have indirect data inside the listctrl itself.
 396 // ----------------------------------------------------------------------------
 397
 398 class wxTreeItemIndirectData
 399 {
 400 public:
 401     // ctor associates this data with the item and the real item data becomes
 402     // available through our GetData() method
 403     wxTreeItemIndirectData(wxTreeCtrl *tree, const wxTreeItemId& item)
 404     {
 405         for ( size_t n = 0; n < WXSIZEOF(m_images); n++ )
 406         {
 407             m_images[n] = -1;
 408         }
 409
 410         // save the old data
 411         m_data = tree->GetItemData(item);
 412
 413         // and set ourselves as the new one
 414         tree->SetIndirectItemData(item, this);
 415     }
 416
 417     // dtor deletes the associated data as well
 418     ~wxTreeItemIndirectData() { delete m_data; }
 419
 420     // accessors
 421         // get the real data associated with the item
 422     wxTreeItemData *GetData() const { return m_data; }
 423         // change it
 424     void SetData(wxTreeItemData *data) { m_data = data; }
 425
 426         // do we have such image?
 427     bool HasImage(wxTreeItemIcon which) const { return m_images[which] != -1; }
 428         // get image
 429     int GetImage(wxTreeItemIcon which) const { return m_images[which]; }
 430         // change it
 431     void SetImage(int image, wxTreeItemIcon which) { m_images[which] = image; }
 432
 433 private:
 434     // all the images associated with the item
 435     int m_images[wxTreeItemIcon_Max];
 436
 437     wxTreeItemData *m_data;
 438 };
 439
 440 // ----------------------------------------------------------------------------
 441 // wxWin macros
 442 // ----------------------------------------------------------------------------
 443
 444 IMPLEMENT_DYNAMIC_CLASS(wxTreeCtrl, wxControl)
 445
 446 // ----------------------------------------------------------------------------
 447 // variables
 448 // ----------------------------------------------------------------------------
 449
 450 // handy table for sending events
 451 static const wxEventType g_events[2][2] =
 452 {
 453     { wxEVT_COMMAND_TREE_ITEM_COLLAPSED, wxEVT_COMMAND_TREE_ITEM_COLLAPSING },
 454     { wxEVT_COMMAND_TREE_ITEM_EXPANDED,  wxEVT_COMMAND_TREE_ITEM_EXPANDING  }
 455 };
 456
 457 // ============================================================================
 458 // implementation
 459 // ============================================================================
 460
 461 // ----------------------------------------------------------------------------
 462 // tree traversal
 463 // ----------------------------------------------------------------------------
 464
 465 bool wxTreeTraversal::DoTraverse(const wxTreeItemId& root, bool recursively)
 466 {
 467     if ( !OnVisit(root) )
 468         return FALSE;
 469
 470     return Traverse(root, recursively);
 471 }
 472
 473 bool wxTreeTraversal::Traverse(const wxTreeItemId& root, bool recursively)
 474 {
 475     long cookie;
 476     wxTreeItemId child = m_tree->GetFirstChild(root, cookie);
 477     while ( child.IsOk() )
 478     {
 479         // depth first traversal
 480         if ( recursively && !Traverse(child, TRUE) )
 481             return FALSE;
 482
 483         if ( !OnVisit(child) )
 484             return FALSE;
 485
 486         child = m_tree->GetNextChild(root, cookie);
 487     }
 488
 489     return TRUE;
 490 }
 491
 492 // ----------------------------------------------------------------------------
 493 // construction and destruction
 494 // ----------------------------------------------------------------------------
 495
 496 void wxTreeCtrl::Init()
 497 {
 498     m_imageListNormal = NULL;
 499     m_imageListState = NULL;
 500     m_ownsImageListNormal = m_ownsImageListState = FALSE;
 501     m_textCtrl = NULL;
 502     m_hasAnyAttr = FALSE;
 503     m_dragImage = NULL;
 504
 505     m_htSelStart = 0;
 506 }
 507
 508 bool wxTreeCtrl::Create(wxWindow *parent,
 509                         wxWindowID id,
 510                         const wxPoint& pos,
 511                         const wxSize& size,
 512                         long style,
 513                         const wxValidator& validator,
 514                         const wxString& name)
 515 {
 516     Init();
 517
 518     if ( !CreateControl(parent, id, pos, size, style, validator, name) )
 519         return FALSE;
 520
 521     DWORD wstyle = WS_VISIBLE | WS_CHILD | WS_TABSTOP |
 522                    TVS_SHOWSELALWAYS /* | WS_CLIPSIBLINGS */;
 523
 524     if ((m_windowStyle & wxTR_NO_LINES) == 0)
 525         wstyle |= TVS_HASLINES;
 526     if ( m_windowStyle & wxTR_HAS_BUTTONS )
 527         wstyle |= TVS_HASBUTTONS;
 528
 529     if ( m_windowStyle & wxTR_EDIT_LABELS )
 530         wstyle |= TVS_EDITLABELS;
 531
 532     if ( m_windowStyle & wxTR_LINES_AT_ROOT )
 533         wstyle |= TVS_LINESATROOT;
 534
 535     // using TVS_CHECKBOXES for emulation of a multiselection tree control
 536     // doesn't work without the new enough headers
 537 #if wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE && \
 538     !defined( __GNUWIN32_OLD__ ) && \
 539     !defined( __BORLANDC__ ) && \
 540     !defined( __WATCOMC__ ) && \
 541     (!defined(__VISUALC__) || (__VISUALC__ > 1010))
 542
 543     // we emulate the multiple selection tree controls by using checkboxes: set
 544     // up the image list we need for this if we do have multiple selections
 545     if ( m_windowStyle & wxTR_MULTIPLE )
 546         wstyle |= TVS_CHECKBOXES;
 547 #endif // wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE
 548
 549     // Create the tree control.
 550     if ( !MSWCreateControl(WC_TREEVIEW, wstyle) )
 551         return FALSE;
 552
 553 #if wxUSE_COMCTL32_SAFELY
 554     wxWindow::SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 555     wxWindow::SetForegroundColour(wxWindow::GetParent()->GetForegroundColour());
 556 #elif 1
 557     SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 558     SetForegroundColour(wxWindow::GetParent()->GetForegroundColour());
 559 #else
 560     // This works around a bug in the Windows tree control whereby for some versions
 561     // of comctrl32, setting any colour actually draws the background in black.
 562     // This will initialise the background to the system colour.
 563     // THIS FIX NOW REVERTED since it caused problems on _other_ systems.
 564     // Assume the user has an updated comctl32.dll.
 565     ::SendMessage(GetHwnd(), TVM_SETBKCOLOR, 0,-1);
 566     wxWindow::SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 567     SetForegroundColour(wxWindow::GetParent()->GetForegroundColour());
 568 #endif
 569
 570
 571     // VZ: this is some experimental code which may be used to get the
 572     //     TVS_CHECKBOXES style functionality for comctl32.dll < 4.71.
 573     //     AFAIK, the standard DLL does about the same thing anyhow.
 574 #if 0
 575     if ( m_windowStyle & wxTR_MULTIPLE )
 576     {
 577         wxBitmap bmp;
 578
 579         // create the DC compatible with the current screen
 580         HDC hdcMem = CreateCompatibleDC(NULL);
 581
 582         // create a mono bitmap of the standard size
 583         int x = GetSystemMetrics(SM_CXMENUCHECK);
 584         int y = GetSystemMetrics(SM_CYMENUCHECK);
 585         wxImageList imagelistCheckboxes(x, y, FALSE, 2);
 586         HBITMAP hbmpCheck = CreateBitmap(x, y,   // bitmap size
 587                                          1,      // # of color planes
 588                                          1,      // # bits needed for one pixel
 589                                          0);     // array containing colour data
 590         SelectObject(hdcMem, hbmpCheck);
 591
 592         // then draw a check mark into it
 593         RECT rect = { 0, 0, x, y };
 594         if ( !::DrawFrameControl(hdcMem, &rect,
 595                                  DFC_BUTTON,
 596                                  DFCS_BUTTONCHECK | DFCS_CHECKED) )
 597         {
 598             wxLogLastError(wxT("DrawFrameControl(check)"));
 599         }
 600
 601         bmp.SetHBITMAP((WXHBITMAP)hbmpCheck);
 602         imagelistCheckboxes.Add(bmp);
 603
 604         if ( !::DrawFrameControl(hdcMem, &rect,
 605                                  DFC_BUTTON,
 606                                  DFCS_BUTTONCHECK) )
 607         {
 608             wxLogLastError(wxT("DrawFrameControl(uncheck)"));
 609         }
 610
 611         bmp.SetHBITMAP((WXHBITMAP)hbmpCheck);
 612         imagelistCheckboxes.Add(bmp);
 613
 614         // clean up
 615         ::DeleteDC(hdcMem);
 616
 617         // set the imagelist
 618         SetStateImageList(&imagelistCheckboxes);
 619     }
 620 #endif // 0
 621
 622     SetSize(pos.x, pos.y, size.x, size.y);
 623
 624     return TRUE;
 625 }
 626
 627 wxTreeCtrl::~wxTreeCtrl()
 628 {
 629     // delete any attributes
 630     if ( m_hasAnyAttr )
 631     {
 632         for ( wxNode *node = m_attrs.Next(); node; node = m_attrs.Next() )
 633         {
 634             delete (wxTreeItemAttr *)node->Data();
 635         }
 636
 637         // prevent TVN_DELETEITEM handler from deleting the attributes again!
 638         m_hasAnyAttr = FALSE;
 639     }
 640
 641     DeleteTextCtrl();
 642
 643     // delete user data to prevent memory leaks
 644     DeleteAllItems();
 645
 646     if (m_ownsImageListNormal) delete m_imageListNormal;
 647     if (m_ownsImageListState) delete m_imageListState;
 648 }
 649
 650 // ----------------------------------------------------------------------------
 651 // accessors
 652 // ----------------------------------------------------------------------------
 653
 654 // simple wrappers which add error checking in debug mode
 655
 656 bool wxTreeCtrl::DoGetItem(wxTreeViewItem* tvItem) const
 657 {
 658     if ( !TreeView_GetItem(GetHwnd(), tvItem) )
 659     {
 660         wxLogLastError(wxT("TreeView_GetItem"));
 661
 662         return FALSE;
 663     }
 664
 665     return TRUE;
 666 }
 667
 668 void wxTreeCtrl::DoSetItem(wxTreeViewItem* tvItem)
 669 {
 670     if ( TreeView_SetItem(GetHwnd(), tvItem) == -1 )
 671     {
 672         wxLogLastError(wxT("TreeView_SetItem"));
 673     }
 674 }
 675
 676 size_t wxTreeCtrl::GetCount() const
 677 {
 678     return (size_t)TreeView_GetCount(GetHwnd());
 679 }
 680
 681 unsigned int wxTreeCtrl::GetIndent() const
 682 {
 683     return TreeView_GetIndent(GetHwnd());
 684 }
 685
 686 void wxTreeCtrl::SetIndent(unsigned int indent)
 687 {
 688     TreeView_SetIndent(GetHwnd(), indent);
 689 }
 690
 691 wxImageList *wxTreeCtrl::GetImageList() const
 692 {
 693     return m_imageListNormal;
 694 }
 695
 696 wxImageList *wxTreeCtrl::GetStateImageList() const
 697 {
 698     return m_imageListNormal;
 699 }
 700
 701 void wxTreeCtrl::SetAnyImageList(wxImageList *imageList, int which)
 702 {
 703     // no error return
 704     TreeView_SetImageList(GetHwnd(),
 705                           imageList ? imageList->GetHIMAGELIST() : 0,
 706                           which);
 707 }
 708
 709 void wxTreeCtrl::SetImageList(wxImageList *imageList)
 710 {
 711     if (m_ownsImageListNormal) delete m_imageListNormal;
 712     SetAnyImageList(m_imageListNormal = imageList, TVSIL_NORMAL);
 713     m_ownsImageListNormal = FALSE;
 714 }
 715
 716 void wxTreeCtrl::SetStateImageList(wxImageList *imageList)
 717 {
 718     if (m_ownsImageListState) delete m_imageListState;
 719     SetAnyImageList(m_imageListState = imageList, TVSIL_STATE);
 720     m_ownsImageListState = FALSE;
 721 }
 722
 723 void wxTreeCtrl::AssignImageList(wxImageList *imageList)
 724 {
 725     SetImageList(imageList);
 726     m_ownsImageListNormal = TRUE;
 727 }
 728
 729 void wxTreeCtrl::AssignStateImageList(wxImageList *imageList)
 730 {
 731     SetStateImageList(imageList);
 732     m_ownsImageListState = TRUE;
 733 }
 734
 735 size_t wxTreeCtrl::GetChildrenCount(const wxTreeItemId& item,
 736                                     bool recursively) const
 737 {
 738     TraverseCounter counter(this, item, recursively);
 739
 740     return counter.GetCount() - 1;
 741 }
 742
 743 // ----------------------------------------------------------------------------
 744 // control colours
 745 // ----------------------------------------------------------------------------
 746
 747 bool wxTreeCtrl::SetBackgroundColour(const wxColour &colour)
 748 {
 749 #if !wxUSE_COMCTL32_SAFELY
 750     if ( !wxWindowBase::SetBackgroundColour(colour) )
 751         return FALSE;
 752
 753     SendMessage(GetHwnd(), TVM_SETBKCOLOR, 0, colour.GetPixel());
 754 #endif
 755
 756     return TRUE;
 757 }
 758
 759 bool wxTreeCtrl::SetForegroundColour(const wxColour &colour)
 760 {
 761 #if !wxUSE_COMCTL32_SAFELY
 762     if ( !wxWindowBase::SetForegroundColour(colour) )
 763         return FALSE;
 764
 765     SendMessage(GetHwnd(), TVM_SETTEXTCOLOR, 0, colour.GetPixel());
 766 #endif
 767
 768     return TRUE;
 769 }
 770
 771 // ----------------------------------------------------------------------------
 772 // Item access
 773 // ----------------------------------------------------------------------------
 774
 775 wxString wxTreeCtrl::GetItemText(const wxTreeItemId& item) const
 776 {
 777     wxChar buf[512];  // the size is arbitrary...
 778
 779     wxTreeViewItem tvItem(item, TVIF_TEXT);
 780     tvItem.pszText = buf;
 781     tvItem.cchTextMax = WXSIZEOF(buf);
 782     if ( !DoGetItem(&tvItem) )
 783     {
 784         // don't return some garbage which was on stack, but an empty string
 785         buf[0] = wxT('\0');
 786     }
 787
 788     return wxString(buf);
 789 }
 790
 791 void wxTreeCtrl::SetItemText(const wxTreeItemId& item, const wxString& text)
 792 {
 793     wxTreeViewItem tvItem(item, TVIF_TEXT);
 794     tvItem.pszText = (wxChar *)text.c_str();  // conversion is ok
 795     DoSetItem(&tvItem);
 796 }
 797
 798 int wxTreeCtrl::DoGetItemImageFromData(const wxTreeItemId& item,
 799                                        wxTreeItemIcon which) const
 800 {
 801     wxTreeViewItem tvItem(item, TVIF_PARAM);
 802     if ( !DoGetItem(&tvItem) )
 803     {
 804         return -1;
 805     }
 806
 807     return ((wxTreeItemIndirectData *)tvItem.lParam)->GetImage(which);
 808 }
 809
 810 void wxTreeCtrl::DoSetItemImageFromData(const wxTreeItemId& item,
 811                                         int image,
 812                                         wxTreeItemIcon which) const
 813 {
 814     wxTreeViewItem tvItem(item, TVIF_PARAM);
 815     if ( !DoGetItem(&tvItem) )
 816     {
 817         return;
 818     }
 819
 820     wxTreeItemIndirectData *data = ((wxTreeItemIndirectData *)tvItem.lParam);
 821
 822     data->SetImage(image, which);
 823
 824     // make sure that we have selected images as well
 825     if ( which == wxTreeItemIcon_Normal &&
 826          !data->HasImage(wxTreeItemIcon_Selected) )
 827     {
 828         data->SetImage(image, wxTreeItemIcon_Selected);
 829     }
 830
 831     if ( which == wxTreeItemIcon_Expanded &&
 832          !data->HasImage(wxTreeItemIcon_SelectedExpanded) )
 833     {
 834         data->SetImage(image, wxTreeItemIcon_SelectedExpanded);
 835     }
 836 }
 837
 838 void wxTreeCtrl::DoSetItemImages(const wxTreeItemId& item,
 839                                  int image,
 840                                  int imageSel)
 841 {
 842     wxTreeViewItem tvItem(item, TVIF_IMAGE | TVIF_SELECTEDIMAGE);
 843     tvItem.iSelectedImage = imageSel;
 844     tvItem.iImage = image;
 845     DoSetItem(&tvItem);
 846 }
 847
 848 int wxTreeCtrl::GetItemImage(const wxTreeItemId& item,
 849                              wxTreeItemIcon which) const
 850 {
 851     if ( HasIndirectData(item) )
 852     {
 853         return DoGetItemImageFromData(item, which);
 854     }
 855
 856     UINT mask;
 857     switch ( which )
 858     {
 859         default:
 860             wxFAIL_MSG( wxT("unknown tree item image type") );
 861
 862         case wxTreeItemIcon_Normal:
 863             mask = TVIF_IMAGE;
 864             break;
 865
 866         case wxTreeItemIcon_Selected:
 867             mask = TVIF_SELECTEDIMAGE;
 868             break;
 869
 870         case wxTreeItemIcon_Expanded:
 871         case wxTreeItemIcon_SelectedExpanded:
 872             return -1;
 873     }
 874
 875     wxTreeViewItem tvItem(item, mask);
 876     DoGetItem(&tvItem);
 877
 878     return mask == TVIF_IMAGE ? tvItem.iImage : tvItem.iSelectedImage;
 879 }
 880
 881 void wxTreeCtrl::SetItemImage(const wxTreeItemId& item, int image,
 882                               wxTreeItemIcon which)
 883 {
 884     int imageNormal, imageSel;
 885     switch ( which )
 886     {
 887         default:
 888             wxFAIL_MSG( wxT("unknown tree item image type") );
 889
 890         case wxTreeItemIcon_Normal:
 891             imageNormal = image;
 892             imageSel = GetItemSelectedImage(item);
 893             break;
 894
 895         case wxTreeItemIcon_Selected:
 896             imageNormal = GetItemImage(item);
 897             imageSel = image;
 898             break;
 899
 900         case wxTreeItemIcon_Expanded:
 901         case wxTreeItemIcon_SelectedExpanded:
 902             if ( !HasIndirectData(item) )
 903             {
 904                 // we need to get the old images first, because after we create
 905                 // the wxTreeItemIndirectData GetItemXXXImage() will use it to
 906                 // get the images
 907                 imageNormal = GetItemImage(item);
 908                 imageSel = GetItemSelectedImage(item);
 909
 910                 // if it doesn't have it yet, add it
 911                 wxTreeItemIndirectData *data = new
 912                     wxTreeItemIndirectData(this, item);
 913
 914                 // copy the data to the new location
 915                 data->SetImage(imageNormal, wxTreeItemIcon_Normal);
 916                 data->SetImage(imageSel, wxTreeItemIcon_Selected);
 917             }
 918
 919             DoSetItemImageFromData(item, image, which);
 920
 921             // reset the normal/selected images because we won't use them any
 922             // more - now they're stored inside the indirect data
 923             imageNormal =
 924             imageSel = I_IMAGECALLBACK;
 925             break;
 926     }
 927
 928     // NB: at least in version 5.00.0518.9 of comctl32.dll we need to always
 929     //     change both normal and selected image - otherwise the change simply
 930     //     doesn't take place!
 931     DoSetItemImages(item, imageNormal, imageSel);
 932 }
 933
 934 wxTreeItemData *wxTreeCtrl::GetItemData(const wxTreeItemId& item) const
 935 {
 936     wxTreeViewItem tvItem(item, TVIF_PARAM);
 937     if ( !DoGetItem(&tvItem) )
 938     {
 939         return NULL;
 940     }
 941
 942     if ( HasIndirectData(item) )
 943     {
 944         return ((wxTreeItemIndirectData *)tvItem.lParam)->GetData();
 945     }
 946     else
 947     {
 948         return (wxTreeItemData *)tvItem.lParam;
 949     }
 950 }
 951
 952 void wxTreeCtrl::SetItemData(const wxTreeItemId& item, wxTreeItemData *data)
 953 {
 954     // first, associate this piece of data with this item
 955     if ( data )
 956     {
 957         data->SetId(item);
 958     }
 959
 960     wxTreeViewItem tvItem(item, TVIF_PARAM);
 961
 962     if ( HasIndirectData(item) )
 963     {
 964         if ( DoGetItem(&tvItem) )
 965         {
 966             ((wxTreeItemIndirectData *)tvItem.lParam)->SetData(data);
 967         }
 968         else
 969         {
 970             wxFAIL_MSG( wxT("failed to change tree items data") );
 971         }
 972     }
 973     else
 974     {
 975         tvItem.lParam = (LPARAM)data;
 976         DoSetItem(&tvItem);
 977     }
 978 }
 979
 980 void wxTreeCtrl::SetIndirectItemData(const wxTreeItemId& item,
 981                                      wxTreeItemIndirectData *data)
 982 {
 983     // this should never happen because it's unnecessary and will probably lead
 984     // to crash too because the code elsewhere supposes that the pointer the
 985     // wxTreeItemIndirectData has is a real wxItemData and not
 986     // wxTreeItemIndirectData as well
 987     wxASSERT_MSG( !HasIndirectData(item), wxT("setting indirect data twice?") );
 988
 989     SetItemData(item, (wxTreeItemData *)data);
 990
 991     m_itemsWithIndirectData.Add(item);
 992 }
 993
 994 bool wxTreeCtrl::HasIndirectData(const wxTreeItemId& item) const
 995 {
 996     return m_itemsWithIndirectData.Index(item) != wxNOT_FOUND;
 997 }
 998
 999 void wxTreeCtrl::SetItemHasChildren(const wxTreeItemId& item, bool has)
1000 {
1001     wxTreeViewItem tvItem(item, TVIF_CHILDREN);
1002     tvItem.cChildren = (int)has;
1003     DoSetItem(&tvItem);
1004 }
1005
1006 void wxTreeCtrl::SetItemBold(const wxTreeItemId& item, bool bold)
1007 {
1008     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_BOLD);
1009     tvItem.state = bold ? TVIS_BOLD : 0;
1010     DoSetItem(&tvItem);
1011 }
1012
1013 void wxTreeCtrl::SetItemDropHighlight(const wxTreeItemId& item, bool highlight)
1014 {
1015     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_DROPHILITED);
1016     tvItem.state = highlight ? TVIS_DROPHILITED : 0;
1017     DoSetItem(&tvItem);
1018 }
1019
1020 void wxTreeCtrl::SetItemTextColour(const wxTreeItemId& item,
1021                                    const wxColour& col)
1022 {
1023     m_hasAnyAttr = TRUE;
1024
1025     long id = (long)(WXHTREEITEM)item;
1026     wxTreeItemAttr *attr = (wxTreeItemAttr *)m_attrs.Get(id);
1027     if ( !attr )
1028     {
1029         attr = new wxTreeItemAttr;
1030         m_attrs.Put(id, (wxObject *)attr);
1031     }
1032
1033     attr->SetTextColour(col);
1034 }
1035
1036 void wxTreeCtrl::SetItemBackgroundColour(const wxTreeItemId& item,
1037                                          const wxColour& col)
1038 {
1039     m_hasAnyAttr = TRUE;
1040
1041     long id = (long)(WXHTREEITEM)item;
1042     wxTreeItemAttr *attr = (wxTreeItemAttr *)m_attrs.Get(id);
1043     if ( !attr )
1044     {
1045         attr = new wxTreeItemAttr;
1046         m_attrs.Put(id, (wxObject *)attr);
1047     }
1048
1049     attr->SetBackgroundColour(col);
1050 }
1051
1052 void wxTreeCtrl::SetItemFont(const wxTreeItemId& item, const wxFont& font)
1053 {
1054     m_hasAnyAttr = TRUE;
1055
1056     long id = (long)(WXHTREEITEM)item;
1057     wxTreeItemAttr *attr = (wxTreeItemAttr *)m_attrs.Get(id);
1058     if ( !attr )
1059     {
1060         attr = new wxTreeItemAttr;
1061         m_attrs.Put(id, (wxObject *)attr);
1062     }
1063
1064     attr->SetFont(font);
1065 }
1066
1067 // ----------------------------------------------------------------------------
1068 // Item status
1069 // ----------------------------------------------------------------------------
1070
1071 bool wxTreeCtrl::IsVisible(const wxTreeItemId& item) const
1072 {
1073     // Bug in Gnu-Win32 headers, so don't use the macro TreeView_GetItemRect
1074     RECT rect;
1075
1076     // this ugliness comes directly from MSDN - it *is* the correct way to pass
1077     // the HTREEITEM with TVM_GETITEMRECT
1078     *(WXHTREEITEM *)&rect = (WXHTREEITEM)item;
1079
1080     // FALSE means get item rect for the whole item, not only text
1081     return SendMessage(GetHwnd(), TVM_GETITEMRECT, FALSE, (LPARAM)&rect) != 0;
1082
1083 }
1084
1085 bool wxTreeCtrl::ItemHasChildren(const wxTreeItemId& item) const
1086 {
1087     wxTreeViewItem tvItem(item, TVIF_CHILDREN);
1088     DoGetItem(&tvItem);
1089
1090     return tvItem.cChildren != 0;
1091 }
1092
1093 bool wxTreeCtrl::IsExpanded(const wxTreeItemId& item) const
1094 {
1095     // probably not a good idea to put it here
1096     //wxASSERT( ItemHasChildren(item) );
1097
1098     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_EXPANDED);
1099     DoGetItem(&tvItem);
1100
1101     return (tvItem.state & TVIS_EXPANDED) != 0;
1102 }
1103
1104 bool wxTreeCtrl::IsSelected(const wxTreeItemId& item) const
1105 {
1106     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_SELECTED);
1107     DoGetItem(&tvItem);
1108
1109     return (tvItem.state & TVIS_SELECTED) != 0;
1110 }
1111
1112 bool wxTreeCtrl::IsBold(const wxTreeItemId& item) const
1113 {
1114     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_BOLD);
1115     DoGetItem(&tvItem);
1116
1117     return (tvItem.state & TVIS_BOLD) != 0;
1118 }
1119
1120 // ----------------------------------------------------------------------------
1121 // navigation
1122 // ----------------------------------------------------------------------------
1123
1124 wxTreeItemId wxTreeCtrl::GetRootItem() const
1125 {
1126     return wxTreeItemId((WXHTREEITEM) TreeView_GetRoot(GetHwnd()));
1127 }
1128
1129 wxTreeItemId wxTreeCtrl::GetSelection() const
1130 {
1131     wxCHECK_MSG( !(m_windowStyle & wxTR_MULTIPLE), (long)(WXHTREEITEM)0,
1132                  wxT("this only works with single selection controls") );
1133
1134     return wxTreeItemId((WXHTREEITEM) TreeView_GetSelection(GetHwnd()));
1135 }
1136
1137 wxTreeItemId wxTreeCtrl::GetParent(const wxTreeItemId& item) const
1138 {
1139     return wxTreeItemId((WXHTREEITEM) TreeView_GetParent(GetHwnd(), HITEM(item)));
1140 }
1141
1142 wxTreeItemId wxTreeCtrl::GetFirstChild(const wxTreeItemId& item,
1143                                        long& _cookie) const
1144 {
1145     // remember the last child returned in 'cookie'
1146     _cookie = (long)TreeView_GetChild(GetHwnd(), HITEM(item));
1147
1148     return wxTreeItemId((WXHTREEITEM)_cookie);
1149 }
1150
1151 wxTreeItemId wxTreeCtrl::GetNextChild(const wxTreeItemId& WXUNUSED(item),
1152                                       long& _cookie) const
1153 {
1154     wxTreeItemId l = wxTreeItemId((WXHTREEITEM)TreeView_GetNextSibling(GetHwnd(),
1155                                    HITEM(_cookie)));
1156     _cookie = (long)l;
1157
1158     return l;
1159 }
1160
1161 wxTreeItemId wxTreeCtrl::GetLastChild(const wxTreeItemId& item) const
1162 {
1163     // can this be done more efficiently?
1164     long cookie;
1165
1166     wxTreeItemId childLast,
1167     child = GetFirstChild(item, cookie);
1168     while ( child.IsOk() )
1169     {
1170         childLast = child;
1171         child = GetNextChild(item, cookie);
1172     }
1173
1174     return childLast;
1175 }
1176
1177 wxTreeItemId wxTreeCtrl::GetNextSibling(const wxTreeItemId& item) const
1178 {
1179     return wxTreeItemId((WXHTREEITEM) TreeView_GetNextSibling(GetHwnd(), HITEM(item)));
1180 }
1181
1182 wxTreeItemId wxTreeCtrl::GetPrevSibling(const wxTreeItemId& item) const
1183 {
1184     return wxTreeItemId((WXHTREEITEM) TreeView_GetPrevSibling(GetHwnd(), HITEM(item)));
1185 }
1186
1187 wxTreeItemId wxTreeCtrl::GetFirstVisibleItem() const
1188 {
1189     return wxTreeItemId((WXHTREEITEM) TreeView_GetFirstVisible(GetHwnd()));
1190 }
1191
1192 wxTreeItemId wxTreeCtrl::GetNextVisible(const wxTreeItemId& item) const
1193 {
1194     wxASSERT_MSG( IsVisible(item), wxT("The item you call GetNextVisible() for must be visible itself!"));
1195
1196     return wxTreeItemId((WXHTREEITEM) TreeView_GetNextVisible(GetHwnd(), HITEM(item)));
1197 }
1198
1199 wxTreeItemId wxTreeCtrl::GetPrevVisible(const wxTreeItemId& item) const
1200 {
1201     wxASSERT_MSG( IsVisible(item), wxT("The item you call GetPrevVisible() for must be visible itself!"));
1202
1203     return wxTreeItemId((WXHTREEITEM) TreeView_GetPrevVisible(GetHwnd(), HITEM(item)));
1204 }
1205
1206 // ----------------------------------------------------------------------------
1207 // multiple selections emulation
1208 // ----------------------------------------------------------------------------
1209
1210 bool wxTreeCtrl::IsItemChecked(const wxTreeItemId& item) const
1211 {
1212     // receive the desired information.
1213     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_STATEIMAGEMASK);
1214     DoGetItem(&tvItem);
1215
1216     // state image indices are 1 based
1217     return ((tvItem.state >> 12) - 1) == 1;
1218 }
1219
1220 void wxTreeCtrl::SetItemCheck(const wxTreeItemId& item, bool check)
1221 {
1222     // receive the desired information.
1223     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_STATEIMAGEMASK);
1224
1225     // state images are one-based
1226     tvItem.state = (check ? 2 : 1) << 12;
1227
1228     DoSetItem(&tvItem);
1229 }
1230
1231 size_t wxTreeCtrl::GetSelections(wxArrayTreeItemIds& selections) const
1232 {
1233     TraverseSelections selector(this, selections);
1234
1235     return selector.GetCount();
1236 }
1237
1238 // ----------------------------------------------------------------------------
1239 // Usual operations
1240 // ----------------------------------------------------------------------------
1241
1242 wxTreeItemId wxTreeCtrl::DoInsertItem(const wxTreeItemId& parent,
1243                                       wxTreeItemId hInsertAfter,
1244                                       const wxString& text,
1245                                       int image, int selectedImage,
1246                                       wxTreeItemData *data)
1247 {
1248     wxCHECK_MSG( parent.IsOk() || !TreeView_GetRoot(GetHwnd()),
1249                  wxTreeItemId(),
1250                  _T("can't have more than one root in the tree") );
1251
1252     TV_INSERTSTRUCT tvIns;
1253     tvIns.hParent = HITEM(parent);
1254     tvIns.hInsertAfter = HITEM(hInsertAfter);
1255
1256     // this is how we insert the item as the first child: supply a NULL
1257     // hInsertAfter
1258     if ( !tvIns.hInsertAfter )
1259     {
1260         tvIns.hInsertAfter = TVI_FIRST;
1261     }
1262
1263     UINT mask = 0;
1264     if ( !text.IsEmpty() )
1265     {
1266         mask |= TVIF_TEXT;
1267         tvIns.item.pszText = (wxChar *)text.c_str();  // cast is ok
1268     }
1269     else
1270     {
1271         tvIns.item.pszText = NULL;
1272         tvIns.item.cchTextMax = 0;
1273     }
1274
1275     if ( image != -1 )
1276     {
1277         mask |= TVIF_IMAGE;
1278         tvIns.item.iImage = image;
1279
1280         if ( selectedImage == -1 )
1281         {
1282             // take the same image for selected icon if not specified
1283             selectedImage = image;
1284         }
1285     }
1286
1287     if ( selectedImage != -1 )
1288     {
1289         mask |= TVIF_SELECTEDIMAGE;
1290         tvIns.item.iSelectedImage = selectedImage;
1291     }
1292
1293     if ( data != NULL )
1294     {
1295         mask |= TVIF_PARAM;
1296         tvIns.item.lParam = (LPARAM)data;
1297     }
1298
1299     tvIns.item.mask = mask;
1300
1301     HTREEITEM id = (HTREEITEM) TreeView_InsertItem(GetHwnd(), &tvIns);
1302     if ( id == 0 )
1303     {
1304         wxLogLastError(wxT("TreeView_InsertItem"));
1305     }
1306
1307     if ( data != NULL )
1308     {
1309         // associate the application tree item with Win32 tree item handle
1310         data->SetId((WXHTREEITEM)id);
1311     }
1312
1313     return wxTreeItemId((WXHTREEITEM)id);
1314 }
1315
1316 // for compatibility only
1317 wxTreeItemId wxTreeCtrl::InsertItem(const wxTreeItemId& parent,
1318                                     const wxString& text,
1319                                     int image, int selImage,
1320                                     long insertAfter)
1321 {
1322     return DoInsertItem(parent, (WXHTREEITEM)insertAfter, text,
1323                         image, selImage, NULL);
1324 }
1325
1326 wxTreeItemId wxTreeCtrl::AddRoot(const wxString& text,
1327                                  int image, int selectedImage,
1328                                  wxTreeItemData *data)
1329 {
1330     return DoInsertItem(wxTreeItemId((long) (WXHTREEITEM) 0), (long)(WXHTREEITEM) 0,
1331                         text, image, selectedImage, data);
1332 }
1333
1334 wxTreeItemId wxTreeCtrl::PrependItem(const wxTreeItemId& parent,
1335                                      const wxString& text,
1336                                      int image, int selectedImage,
1337                                      wxTreeItemData *data)
1338 {
1339     return DoInsertItem(parent, (WXHTREEITEM) TVI_FIRST,
1340                         text, image, selectedImage, data);
1341 }
1342
1343 wxTreeItemId wxTreeCtrl::InsertItem(const wxTreeItemId& parent,
1344                                     const wxTreeItemId& idPrevious,
1345                                     const wxString& text,
1346                                     int image, int selectedImage,
1347                                     wxTreeItemData *data)
1348 {
1349     return DoInsertItem(parent, idPrevious, text, image, selectedImage, data);
1350 }
1351
1352 wxTreeItemId wxTreeCtrl::InsertItem(const wxTreeItemId& parent,
1353                                     size_t index,
1354                                     const wxString& text,
1355                                     int image, int selectedImage,
1356                                     wxTreeItemData *data)
1357 {
1358     // find the item from index
1359     long cookie;
1360     wxTreeItemId idPrev, idCur = GetFirstChild(parent, cookie);
1361     while ( index != 0 && idCur.IsOk() )
1362     {
1363         index--;
1364
1365         idPrev = idCur;
1366         idCur = GetNextChild(parent, cookie);
1367     }
1368
1369     // assert, not check: if the index is invalid, we will append the item
1370     // to the end
1371     wxASSERT_MSG( index == 0, _T("bad index in wxTreeCtrl::InsertItem") );
1372
1373     return DoInsertItem(parent, idPrev, text, image, selectedImage, data);
1374 }
1375
1376 wxTreeItemId wxTreeCtrl::AppendItem(const wxTreeItemId& parent,
1377                                     const wxString& text,
1378                                     int image, int selectedImage,
1379                                     wxTreeItemData *data)
1380 {
1381     return DoInsertItem(parent, (WXHTREEITEM) TVI_LAST,
1382                         text, image, selectedImage, data);
1383 }
1384
1385 void wxTreeCtrl::Delete(const wxTreeItemId& item)
1386 {
1387     if ( !TreeView_DeleteItem(GetHwnd(), HITEM(item)) )
1388     {
1389         wxLogLastError(wxT("TreeView_DeleteItem"));
1390     }
1391 }
1392
1393 // delete all children (but don't delete the item itself)
1394 void wxTreeCtrl::DeleteChildren(const wxTreeItemId& item)
1395 {
1396     long cookie;
1397
1398     wxArrayLong children;
1399     wxTreeItemId child = GetFirstChild(item, cookie);
1400     while ( child.IsOk() )
1401     {
1402         children.Add((long)(WXHTREEITEM)child);
1403
1404         child = GetNextChild(item, cookie);
1405     }
1406
1407     size_t nCount = children.Count();
1408     for ( size_t n = 0; n < nCount; n++ )
1409     {
1410         if ( !TreeView_DeleteItem(GetHwnd(), (HTREEITEM)children[n]) )
1411         {
1412             wxLogLastError(wxT("TreeView_DeleteItem"));
1413         }
1414     }
1415 }
1416
1417 void wxTreeCtrl::DeleteAllItems()
1418 {
1419     if ( !TreeView_DeleteAllItems(GetHwnd()) )
1420     {
1421         wxLogLastError(wxT("TreeView_DeleteAllItems"));
1422     }
1423 }
1424
1425 void wxTreeCtrl::DoExpand(const wxTreeItemId& item, int flag)
1426 {
1427     wxASSERT_MSG( flag == TVE_COLLAPSE ||
1428                   flag == (TVE_COLLAPSE | TVE_COLLAPSERESET) ||
1429                   flag == TVE_EXPAND   ||
1430                   flag == TVE_TOGGLE,
1431                   wxT("Unknown flag in wxTreeCtrl::DoExpand") );
1432
1433     // TreeView_Expand doesn't send TVN_ITEMEXPAND(ING) messages, so we must
1434     // emulate them. This behaviour has changed slightly with comctl32.dll
1435     // v 4.70 - now it does send them but only the first time. To maintain
1436     // compatible behaviour and also in order to not have surprises with the
1437     // future versions, don't rely on this and still do everything ourselves.
1438     // To avoid that the messages be sent twice when the item is expanded for
1439     // the first time we must clear TVIS_EXPANDEDONCE style manually.
1440
1441     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_EXPANDEDONCE);
1442     tvItem.state = 0;
1443     DoSetItem(&tvItem);
1444
1445     if ( TreeView_Expand(GetHwnd(), HITEM(item), flag) != 0 )
1446     {
1447         wxTreeEvent event(wxEVT_NULL, m_windowId);
1448         event.m_item = item;
1449
1450         bool isExpanded = IsExpanded(item);
1451
1452         event.SetEventObject(this);
1453
1454         // FIXME return value of {EXPAND|COLLAPS}ING event handler is discarded
1455         event.SetEventType(g_events[isExpanded][TRUE]);
1456         GetEventHandler()->ProcessEvent(event);
1457
1458         event.SetEventType(g_events[isExpanded][FALSE]);
1459         GetEventHandler()->ProcessEvent(event);
1460     }
1461     //else: change didn't took place, so do nothing at all
1462 }
1463
1464 void wxTreeCtrl::Expand(const wxTreeItemId& item)
1465 {
1466     DoExpand(item, TVE_EXPAND);
1467 }
1468
1469 void wxTreeCtrl::Collapse(const wxTreeItemId& item)
1470 {
1471     DoExpand(item, TVE_COLLAPSE);
1472 }
1473
1474 void wxTreeCtrl::CollapseAndReset(const wxTreeItemId& item)
1475 {
1476     DoExpand(item, TVE_COLLAPSE | TVE_COLLAPSERESET);
1477 }
1478
1479 void wxTreeCtrl::Toggle(const wxTreeItemId& item)
1480 {
1481     DoExpand(item, TVE_TOGGLE);
1482 }
1483
1484 void wxTreeCtrl::ExpandItem(const wxTreeItemId& item, int action)
1485 {
1486     DoExpand(item, action);
1487 }
1488
1489 void wxTreeCtrl::Unselect()
1490 {
1491     wxASSERT_MSG( !(m_windowStyle & wxTR_MULTIPLE),
1492                   wxT("doesn't make sense, may be you want UnselectAll()?") );
1493
1494     // just remove the selection
1495     SelectItem(wxTreeItemId((long) (WXHTREEITEM) 0));
1496 }
1497
1498 void wxTreeCtrl::UnselectAll()
1499 {
1500     if ( m_windowStyle & wxTR_MULTIPLE )
1501     {
1502         wxArrayTreeItemIds selections;
1503         size_t count = GetSelections(selections);
1504         for ( size_t n = 0; n < count; n++ )
1505         {
1506 #if wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE
1507             SetItemCheck(selections[n], FALSE);
1508 #else // !wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE
1509             ::UnselectItem(GetHwnd(), HITEM(selections[n]));
1510 #endif // wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE/!wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE
1511         }
1512     }
1513     else
1514     {
1515         // just remove the selection
1516         Unselect();
1517     }
1518 }
1519
1520 void wxTreeCtrl::SelectItem(const wxTreeItemId& item)
1521 {
1522     if ( m_windowStyle & wxTR_MULTIPLE )
1523     {
1524 #if wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE
1525         // selecting the item means checking it
1526         SetItemCheck(item);
1527 #else // !wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE
1528         ::SelectItem(GetHwnd(), HITEM(item));
1529 #endif // wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE/!wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE
1530     }
1531     else
1532     {
1533         // inspite of the docs (MSDN Jan 99 edition), we don't seem to receive
1534         // the notification from the control (i.e. TVN_SELCHANG{ED|ING}), so
1535         // send them ourselves
1536
1537         wxTreeEvent event(wxEVT_NULL, m_windowId);
1538         event.m_item = item;
1539         event.SetEventObject(this);
1540
1541         event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGING);
1542         if ( !GetEventHandler()->ProcessEvent(event) || event.IsAllowed() )
1543         {
1544             if ( !TreeView_SelectItem(GetHwnd(), HITEM(item)) )
1545             {
1546                 wxLogLastError(wxT("TreeView_SelectItem"));
1547             }
1548             else
1549             {
1550                 event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGED);
1551                 (void)GetEventHandler()->ProcessEvent(event);
1552             }
1553         }
1554         //else: program vetoed the change
1555     }
1556 }
1557
1558 void wxTreeCtrl::EnsureVisible(const wxTreeItemId& item)
1559 {
1560     // no error return
1561     TreeView_EnsureVisible(GetHwnd(), HITEM(item));
1562 }
1563
1564 void wxTreeCtrl::ScrollTo(const wxTreeItemId& item)
1565 {
1566     if ( !TreeView_SelectSetFirstVisible(GetHwnd(), HITEM(item)) )
1567     {
1568         wxLogLastError(wxT("TreeView_SelectSetFirstVisible"));
1569     }
1570 }
1571
1572 wxTextCtrl* wxTreeCtrl::GetEditControl() const
1573 {
1574     // normally, we could try to do something like this to return something
1575     // even when the editing was started by the user and not by calling
1576     // EditLabel() - but as nobody has asked for this so far and there might be
1577     // problems in the code below, I leave it disabled for now (VZ)
1578 #if 0
1579     if ( !m_textCtrl )
1580     {
1581         HWND hwndText = TreeView_GetEditControl(GetHwnd());
1582         if ( hwndText )
1583         {
1584             m_textCtrl = new wxTextCtrl(this, -1);
1585             m_textCtrl->Hide();
1586             m_textCtrl->SetHWND((WXHWND)hwndText);
1587         }
1588         //else: not editing label right now
1589     }
1590 #endif // 0
1591
1592     return m_textCtrl;
1593 }
1594
1595 void wxTreeCtrl::DeleteTextCtrl()
1596 {
1597     if ( m_textCtrl )
1598     {
1599         m_textCtrl->UnsubclassWin();
1600         m_textCtrl->SetHWND(0);
1601         delete m_textCtrl;
1602         m_textCtrl = NULL;
1603     }
1604 }
1605
1606 wxTextCtrl* wxTreeCtrl::EditLabel(const wxTreeItemId& item,
1607                                   wxClassInfo* textControlClass)
1608 {
1609     wxASSERT( textControlClass->IsKindOf(CLASSINFO(wxTextCtrl)) );
1610
1611     DeleteTextCtrl();
1612
1613     HWND hWnd = (HWND) TreeView_EditLabel(GetHwnd(), HITEM(item));
1614
1615     // this is not an error - the TVN_BEGINLABELEDIT handler might have
1616     // returned FALSE
1617     if ( !hWnd )
1618     {
1619         return NULL;
1620     }
1621
1622     m_textCtrl = (wxTextCtrl *)textControlClass->CreateObject();
1623     m_textCtrl->SetHWND((WXHWND)hWnd);
1624     m_textCtrl->SubclassWin((WXHWND)hWnd);
1625
1626     return m_textCtrl;
1627 }
1628
1629 // End label editing, optionally cancelling the edit
1630 void wxTreeCtrl::EndEditLabel(const wxTreeItemId& item, bool discardChanges)
1631 {
1632     TreeView_EndEditLabelNow(GetHwnd(), discardChanges);
1633
1634     DeleteTextCtrl();
1635 }
1636
1637 wxTreeItemId wxTreeCtrl::HitTest(const wxPoint& point, int& flags)
1638 {
1639     TV_HITTESTINFO hitTestInfo;
1640     hitTestInfo.pt.x = (int)point.x;
1641     hitTestInfo.pt.y = (int)point.y;
1642
1643     TreeView_HitTest(GetHwnd(), &hitTestInfo);
1644
1645     flags = 0;
1646
1647     // avoid repetition
1648     #define TRANSLATE_FLAG(flag) if ( hitTestInfo.flags & TVHT_##flag ) \
1649                                     flags |= wxTREE_HITTEST_##flag
1650
1651     TRANSLATE_FLAG(ABOVE);
1652     TRANSLATE_FLAG(BELOW);
1653     TRANSLATE_FLAG(NOWHERE);
1654     TRANSLATE_FLAG(ONITEMBUTTON);
1655     TRANSLATE_FLAG(ONITEMICON);
1656     TRANSLATE_FLAG(ONITEMINDENT);
1657     TRANSLATE_FLAG(ONITEMLABEL);
1658     TRANSLATE_FLAG(ONITEMRIGHT);
1659     TRANSLATE_FLAG(ONITEMSTATEICON);
1660     TRANSLATE_FLAG(TOLEFT);
1661     TRANSLATE_FLAG(TORIGHT);
1662
1663     #undef TRANSLATE_FLAG
1664
1665     return wxTreeItemId((WXHTREEITEM) hitTestInfo.hItem);
1666 }
1667
1668 bool wxTreeCtrl::GetBoundingRect(const wxTreeItemId& item,
1669                                  wxRect& rect,
1670                                  bool textOnly) const
1671 {
1672     RECT rc;
1673     if ( TreeView_GetItemRect(GetHwnd(), HITEM(item),
1674                               &rc, textOnly) )
1675     {
1676         rect = wxRect(wxPoint(rc.left, rc.top), wxPoint(rc.right, rc.bottom));
1677
1678         return TRUE;
1679     }
1680     else
1681     {
1682         // couldn't retrieve rect: for example, item isn't visible
1683         return FALSE;
1684     }
1685 }
1686
1687 // ----------------------------------------------------------------------------
1688 // sorting stuff
1689 // ----------------------------------------------------------------------------
1690
1691 static int CALLBACK TreeView_CompareCallback(wxTreeItemData *pItem1,
1692                                              wxTreeItemData *pItem2,
1693                                              wxTreeCtrl *tree)
1694 {
1695     wxCHECK_MSG( pItem1 && pItem2, 0,
1696                  wxT("sorting tree without data doesn't make sense") );
1697
1698     return tree->OnCompareItems(pItem1->GetId(), pItem2->GetId());
1699 }
1700
1701 int wxTreeCtrl::OnCompareItems(const wxTreeItemId& item1,
1702                                const wxTreeItemId& item2)
1703 {
1704     return wxStrcmp(GetItemText(item1), GetItemText(item2));
1705 }
1706
1707 void wxTreeCtrl::SortChildren(const wxTreeItemId& item)
1708 {
1709     // rely on the fact that TreeView_SortChildren does the same thing as our
1710     // default behaviour, i.e. sorts items alphabetically and so call it
1711     // directly if we're not in derived class (much more efficient!)
1712     if ( GetClassInfo() == CLASSINFO(wxTreeCtrl) )
1713     {
1714         TreeView_SortChildren(GetHwnd(), HITEM(item), 0);
1715     }
1716     else
1717     {
1718         TV_SORTCB tvSort;
1719         tvSort.hParent = HITEM(item);
1720         tvSort.lpfnCompare = (PFNTVCOMPARE)TreeView_CompareCallback;
1721         tvSort.lParam = (LPARAM)this;
1722         TreeView_SortChildrenCB(GetHwnd(), &tvSort, 0 /* reserved */);
1723     }
1724 }
1725
1726 // ----------------------------------------------------------------------------
1727 // implementation
1728 // ----------------------------------------------------------------------------
1729
1730 bool wxTreeCtrl::MSWCommand(WXUINT cmd, WXWORD id)
1731 {
1732     if ( cmd == EN_UPDATE )
1733     {
1734         wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, id);
1735         event.SetEventObject( this );
1736         ProcessCommand(event);
1737     }
1738     else if ( cmd == EN_KILLFOCUS )
1739     {
1740         wxCommandEvent event(wxEVT_KILL_FOCUS, id);
1741         event.SetEventObject( this );
1742         ProcessCommand(event);
1743     }
1744     else
1745     {
1746         // nothing done
1747         return FALSE;
1748     }
1749
1750     // command processed
1751     return TRUE;
1752 }
1753
1754 // we hook into WndProc to process WM_MOUSEMOVE/WM_BUTTONUP messages - as we
1755 // only do it during dragging, minimize wxWin overhead (this is important for
1756 // WM_MOUSEMOVE as they're a lot of them) by catching Windows messages directly
1757 // instead of passing by wxWin events
1758 long wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1759 {
1760     bool processed = FALSE;
1761     long rc = 0;
1762
1763     bool isMultiple = (GetWindowStyle() & wxTR_MULTIPLE) != 0;
1764
1765     if ( (nMsg >= WM_MOUSEFIRST) && (nMsg <= WM_MOUSELAST) )
1766     {
1767         // we only process mouse messages here and these parameters have the same
1768         // meaning for all of them
1769         int x = GET_X_LPARAM(lParam),
1770             y = GET_Y_LPARAM(lParam);
1771         HTREEITEM htItem = GetItemFromPoint(GetHwnd(), x, y);
1772
1773         switch ( nMsg )
1774         {
1775 #if !wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE
1776             case WM_LBUTTONDOWN:
1777                 if ( htItem && isMultiple )
1778                 {
1779                     if ( wParam & MK_CONTROL )
1780                     {
1781                         SetFocus();
1782
1783                         // toggle selected state
1784                         ToggleItemSelection(GetHwnd(), htItem);
1785
1786                         ::SetFocus(GetHwnd(), htItem);
1787
1788                         // reset on any click without Shift
1789                         m_htSelStart = 0;
1790
1791                         processed = TRUE;
1792                     }
1793                     else if ( wParam & MK_SHIFT )
1794                     {
1795                         // this selects all items between the starting one and
1796                         // the current
1797
1798                         if ( !m_htSelStart )
1799                         {
1800                             // take the focused item
1801                             m_htSelStart = (WXHTREEITEM)
1802                                 TreeView_GetSelection(GetHwnd());
1803                         }
1804
1805                         SelectRange(GetHwnd(), HITEM(m_htSelStart), htItem,
1806                                     !(wParam & MK_CONTROL));
1807
1808                         ::SetFocus(GetHwnd(), htItem);
1809
1810                         processed = TRUE;
1811                     }
1812                     else // normal click
1813                     {
1814                         // clear the selection and then let the default handler
1815                         // do the job
1816                         UnselectAll();
1817
1818                         // prevent the click from starting in-place editing
1819                         // when there was no selection in the control
1820                         TreeView_SelectItem(GetHwnd(), 0);
1821
1822                         // reset on any click without Shift
1823                         m_htSelStart = 0;
1824                     }
1825                 }
1826                 break;
1827 #endif // wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE
1828
1829             case WM_MOUSEMOVE:
1830                 if ( m_dragImage )
1831                 {
1832                     m_dragImage->Move(wxPoint(x, y));
1833                     if ( htItem )
1834                     {
1835                         // highlight the item as target (hiding drag image is
1836                         // necessary - otherwise the display will be corrupted)
1837                         m_dragImage->Hide();
1838                         TreeView_SelectDropTarget(GetHwnd(), htItem);
1839                         m_dragImage->Show();
1840                     }
1841                 }
1842                 break;
1843
1844             case WM_LBUTTONUP:
1845             case WM_RBUTTONUP:
1846                 if ( m_dragImage )
1847                 {
1848                     m_dragImage->EndDrag();
1849                     delete m_dragImage;
1850                     m_dragImage = NULL;
1851
1852                     // generate the drag end event
1853                     wxTreeEvent event(wxEVT_COMMAND_TREE_END_DRAG, m_windowId);
1854
1855                     event.m_item = (WXHTREEITEM)htItem;
1856                     event.m_pointDrag = wxPoint(x, y);
1857                     event.SetEventObject(this);
1858
1859                     (void)GetEventHandler()->ProcessEvent(event);
1860
1861                     // if we don't do it, the tree seems to think that 2 items
1862                     // are selected simultaneously which is quite weird
1863                     TreeView_SelectDropTarget(GetHwnd(), 0);
1864                 }
1865                 break;
1866         }
1867     }
1868 #if !wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE
1869     else if ( (nMsg == WM_SETFOCUS || nMsg == WM_KILLFOCUS) && isMultiple )
1870     {
1871         // the tree control greys out the selected item when it loses focus and
1872         // paints it as selected again when it regains it, but it won't do it
1873         // for the other items itself - help it
1874         wxArrayTreeItemIds selections;
1875         size_t count = GetSelections(selections);
1876         RECT rect;
1877         for ( size_t n = 0; n < count; n++ )
1878         {
1879             // TreeView_GetItemRect() will return FALSE if item is not visible,
1880             // which may happen perfectly well
1881             if ( TreeView_GetItemRect(GetHwnd(), HITEM(selections[n]),
1882                                       &rect, TRUE) )
1883             {
1884                 ::InvalidateRect(GetHwnd(), &rect, FALSE);
1885             }
1886         }
1887     }
1888     else if ( nMsg == WM_KEYDOWN && isMultiple )
1889     {
1890         bool bCtrl = wxIsCtrlDown(),
1891              bShift = wxIsShiftDown();
1892
1893         // we handle.arrows and space, but not page up/down and home/end: the
1894         // latter should be easy, but not the former
1895
1896         HTREEITEM htSel = (HTREEITEM)TreeView_GetSelection(GetHwnd());
1897         if ( !m_htSelStart )
1898         {
1899             m_htSelStart = (WXHTREEITEM)htSel;
1900         }
1901
1902         if ( wParam == VK_SPACE )
1903         {
1904             if ( bCtrl )
1905             {
1906                 ToggleItemSelection(GetHwnd(), htSel);
1907             }
1908             else
1909             {
1910                 UnselectAll();
1911
1912                 ::SelectItem(GetHwnd(), htSel);
1913             }
1914
1915             processed = TRUE;
1916         }
1917         else if ( wParam == VK_UP || wParam == VK_DOWN )
1918         {
1919             if ( !bCtrl && !bShift )
1920             {
1921                 // no modifiers, just clear selection and then let the default
1922                 // processing to take place
1923                 UnselectAll();
1924             }
1925             else if ( htSel )
1926             {
1927                 (void)wxControl::MSWWindowProc(nMsg, wParam, lParam);
1928
1929                 HTREEITEM htNext = (HTREEITEM)(wParam == VK_UP
1930                                     ? TreeView_GetPrevVisible(GetHwnd(), htSel)
1931                                     : TreeView_GetNextVisible(GetHwnd(), htSel));
1932
1933                 if ( !htNext )
1934                 {
1935                     // at the top/bottom
1936                     htNext = htSel;
1937                 }
1938
1939                 if ( bShift )
1940                 {
1941                     SelectRange(GetHwnd(), HITEM(m_htSelStart), htNext);
1942                 }
1943                 else // bCtrl
1944                 {
1945                     // without changing selection
1946                     ::SetFocus(GetHwnd(), htNext);
1947                 }
1948
1949                 processed = TRUE;
1950             }
1951         }
1952     }
1953 #endif // !wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE
1954
1955     if ( !processed )
1956         rc = wxControl::MSWWindowProc(nMsg, wParam, lParam);
1957
1958     return rc;
1959 }
1960
1961 // process WM_NOTIFY Windows message
1962 bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1963 {
1964     wxTreeEvent event(wxEVT_NULL, m_windowId);
1965     wxEventType eventType = wxEVT_NULL;
1966     NMHDR *hdr = (NMHDR *)lParam;
1967
1968     switch ( hdr->code )
1969     {
1970         case TVN_BEGINDRAG:
1971             eventType = wxEVT_COMMAND_TREE_BEGIN_DRAG;
1972             // fall through
1973
1974         case TVN_BEGINRDRAG:
1975             {
1976                 if ( eventType == wxEVT_NULL )
1977                     eventType = wxEVT_COMMAND_TREE_BEGIN_RDRAG;
1978                 //else: left drag, already set above
1979
1980                 NM_TREEVIEW *tv = (NM_TREEVIEW *)lParam;
1981
1982                 event.m_item = (WXHTREEITEM) tv->itemNew.hItem;
1983                 event.m_pointDrag = wxPoint(tv->ptDrag.x, tv->ptDrag.y);
1984
1985                 // don't allow dragging by default: the user code must
1986                 // explicitly say that it wants to allow it to avoid breaking
1987                 // the old apps
1988                 event.Veto();
1989             }
1990             break;
1991
1992         case TVN_BEGINLABELEDIT:
1993             {
1994                 eventType = wxEVT_COMMAND_TREE_BEGIN_LABEL_EDIT;
1995                 TV_DISPINFO *info = (TV_DISPINFO *)lParam;
1996
1997                 event.m_item = (WXHTREEITEM) info->item.hItem;
1998                 event.m_label = info->item.pszText;
1999             }
2000             break;
2001
2002         case TVN_DELETEITEM:
2003             {
2004                 eventType = wxEVT_COMMAND_TREE_DELETE_ITEM;
2005                 NM_TREEVIEW *tv = (NM_TREEVIEW *)lParam;
2006
2007                 event.m_item = (WXHTREEITEM)tv->itemOld.hItem;
2008
2009                 if ( m_hasAnyAttr )
2010                 {
2011                     delete (wxTreeItemAttr *)m_attrs.
2012                                 Delete((long)tv->itemOld.hItem);
2013                 }
2014             }
2015             break;
2016
2017         case TVN_ENDLABELEDIT:
2018             {
2019                 eventType = wxEVT_COMMAND_TREE_END_LABEL_EDIT;
2020                 TV_DISPINFO *info = (TV_DISPINFO *)lParam;
2021
2022                 event.m_item = (WXHTREEITEM)info->item.hItem;
2023                 event.m_label = info->item.pszText;
2024                 if (info->item.pszText == NULL)
2025                     return FALSE;
2026                 break;
2027             }
2028
2029         case TVN_GETDISPINFO:
2030             eventType = wxEVT_COMMAND_TREE_GET_INFO;
2031             // fall through
2032
2033         case TVN_SETDISPINFO:
2034             {
2035                 if ( eventType == wxEVT_NULL )
2036                     eventType = wxEVT_COMMAND_TREE_SET_INFO;
2037                 //else: get, already set above
2038
2039                 TV_DISPINFO *info = (TV_DISPINFO *)lParam;
2040
2041                 event.m_item = (WXHTREEITEM) info->item.hItem;
2042                 break;
2043             }
2044
2045         case TVN_ITEMEXPANDING:
2046             event.m_code = FALSE;
2047             // fall through
2048
2049         case TVN_ITEMEXPANDED:
2050             {
2051                 NM_TREEVIEW* tv = (NM_TREEVIEW*)lParam;
2052
2053                 bool expand = FALSE;
2054                 switch ( tv->action )
2055                 {
2056                     case TVE_EXPAND:
2057                         expand = TRUE;
2058                         break;
2059
2060                     case TVE_COLLAPSE:
2061                         expand = FALSE;
2062                         break;
2063
2064                     default:
2065                         wxLogDebug(wxT("unexpected code %d in TVN_ITEMEXPAND message"), tv->action);
2066                 }
2067
2068                 bool ing = ((int)hdr->code == TVN_ITEMEXPANDING);
2069                 eventType = g_events[expand][ing];
2070
2071                 event.m_item = (WXHTREEITEM) tv->itemNew.hItem;
2072             }
2073             break;
2074
2075         case TVN_KEYDOWN:
2076             {
2077                 eventType = wxEVT_COMMAND_TREE_KEY_DOWN;
2078                 TV_KEYDOWN *info = (TV_KEYDOWN *)lParam;
2079
2080                 event.m_code = wxCharCodeMSWToWX(info->wVKey);
2081
2082                 // a separate event for Space/Return
2083                 if ( !wxIsCtrlDown() && !wxIsShiftDown() &&
2084                      ((info->wVKey == VK_SPACE) || (info->wVKey == VK_RETURN)) )
2085                 {
2086                     wxTreeEvent event2(wxEVT_COMMAND_TREE_ITEM_ACTIVATED,
2087                                        m_windowId);
2088                     event2.SetEventObject(this);
2089                     if ( !(GetWindowStyle() & wxTR_MULTIPLE) )
2090                     {
2091                         event2.m_item = GetSelection();
2092                     }
2093                     //else: don't know how to get it
2094
2095                     (void)GetEventHandler()->ProcessEvent(event2);
2096                 }
2097             }
2098             break;
2099
2100         case TVN_SELCHANGED:
2101             eventType = wxEVT_COMMAND_TREE_SEL_CHANGED;
2102             // fall through
2103
2104         case TVN_SELCHANGING:
2105             {
2106                 if ( eventType == wxEVT_NULL )
2107                     eventType = wxEVT_COMMAND_TREE_SEL_CHANGING;
2108                 //else: already set above
2109
2110                 NM_TREEVIEW* tv = (NM_TREEVIEW *)lParam;
2111
2112                 event.m_item = (WXHTREEITEM) tv->itemNew.hItem;
2113                 event.m_itemOld = (WXHTREEITEM) tv->itemOld.hItem;
2114             }
2115             break;
2116
2117 #if defined(_WIN32_IE) && _WIN32_IE >= 0x300 && !wxUSE_COMCTL32_SAFELY
2118         case NM_CUSTOMDRAW:
2119             {
2120                 LPNMTVCUSTOMDRAW lptvcd = (LPNMTVCUSTOMDRAW)lParam;
2121                 NMCUSTOMDRAW& nmcd = lptvcd->nmcd;
2122                 switch( nmcd.dwDrawStage )
2123                 {
2124                     case CDDS_PREPAINT:
2125                         // if we've got any items with non standard attributes,
2126                         // notify us before painting each item
2127                         *result = m_hasAnyAttr ? CDRF_NOTIFYITEMDRAW
2128                                                : CDRF_DODEFAULT;
2129                         return TRUE;
2130
2131                     case CDDS_ITEMPREPAINT:
2132                         {
2133                             wxTreeItemAttr *attr =
2134                                 (wxTreeItemAttr *)m_attrs.Get(nmcd.dwItemSpec);
2135
2136                             if ( !attr )
2137                             {
2138                                 // nothing to do for this item
2139                                 return CDRF_DODEFAULT;
2140                             }
2141
2142                             HFONT hFont;
2143                             wxColour colText, colBack;
2144                             if ( attr->HasFont() )
2145                             {
2146                                 wxFont font = attr->GetFont();
2147                                 hFont = (HFONT)font.GetResourceHandle();
2148                             }
2149                             else
2150                             {
2151                                 hFont = 0;
2152                             }
2153
2154                             if ( attr->HasTextColour() )
2155                             {
2156                                 colText = attr->GetTextColour();
2157                             }
2158                             else
2159                             {
2160                                 colText = GetForegroundColour();
2161                             }
2162
2163                             // selection colours should override ours
2164                             if ( nmcd.uItemState & CDIS_SELECTED )
2165                             {
2166                                 DWORD clrBk = ::GetSysColor(COLOR_HIGHLIGHT);
2167                                 lptvcd->clrTextBk = clrBk;
2168
2169                                 // try to make the text visible
2170                                 lptvcd->clrText = wxColourToRGB(colText);
2171                                 lptvcd->clrText |= ~clrBk;
2172                                 lptvcd->clrText &= 0x00ffffff;
2173                             }
2174                             else
2175                             {
2176                                 if ( attr->HasBackgroundColour() )
2177                                 {
2178                                     colBack = attr->GetBackgroundColour();
2179                                 }
2180                                 else
2181                                 {
2182                                     colBack = GetBackgroundColour();
2183                                 }
2184
2185                                 lptvcd->clrText = wxColourToRGB(colText);
2186                                 lptvcd->clrTextBk = wxColourToRGB(colBack);
2187                             }
2188
2189                             // note that if we wanted to set colours for
2190                             // individual columns (subitems), we would have
2191                             // returned CDRF_NOTIFYSUBITEMREDRAW from here
2192                             if ( hFont )
2193                             {
2194                                 ::SelectObject(nmcd.hdc, hFont);
2195
2196                                 *result = CDRF_NEWFONT;
2197                             }
2198                             else
2199                             {
2200                                 *result = CDRF_DODEFAULT;
2201                             }
2202
2203                             return TRUE;
2204                         }
2205
2206                     default:
2207                         *result = CDRF_DODEFAULT;
2208                         return TRUE;
2209                 }
2210             }
2211             break;
2212 #endif // _WIN32_IE >= 0x300
2213
2214         case NM_DBLCLK:
2215         case NM_RCLICK:
2216             {
2217                 TV_HITTESTINFO tvhti;
2218                 ::GetCursorPos(&tvhti.pt);
2219                 ::ScreenToClient(GetHwnd(), &tvhti.pt);
2220                 if ( TreeView_HitTest(GetHwnd(), &tvhti) )
2221                 {
2222                     if ( tvhti.flags & TVHT_ONITEM )
2223                     {
2224                         event.m_item = (WXHTREEITEM) tvhti.hItem;
2225                         eventType = (int)hdr->code == NM_DBLCLK
2226                                     ? wxEVT_COMMAND_TREE_ITEM_ACTIVATED
2227                                     : wxEVT_COMMAND_TREE_ITEM_RIGHT_CLICK;
2228
2229                         event.m_pointDrag.x = tvhti.pt.x;
2230                         event.m_pointDrag.y = tvhti.pt.y;
2231                     }
2232
2233                     break;
2234                 }
2235             }
2236             // fall through
2237
2238         default:
2239             return wxControl::MSWOnNotify(idCtrl, lParam, result);
2240     }
2241
2242     event.SetEventObject(this);
2243     event.SetEventType(eventType);
2244
2245     bool processed = GetEventHandler()->ProcessEvent(event);
2246
2247     // post processing
2248     switch ( hdr->code )
2249     {
2250         case NM_DBLCLK:
2251             // we translate NM_DBLCLK into ACTIVATED event, so don't interpret
2252             // the return code of this event handler as the return value for
2253             // NM_DBLCLK - otherwise, double clicking the item to toggle its
2254             // expanded status would never work
2255             *result = FALSE;
2256             break;
2257
2258         case TVN_BEGINDRAG:
2259         case TVN_BEGINRDRAG:
2260             if ( event.IsAllowed() )
2261             {
2262                 // normally this is impossible because the m_dragImage is
2263                 // deleted once the drag operation is over
2264                 wxASSERT_MSG( !m_dragImage, _T("starting to drag once again?") );
2265
2266                 m_dragImage = new wxDragImage(*this, event.m_item);
2267                 m_dragImage->BeginDrag(wxPoint(0, 0), this);
2268                 m_dragImage->Show();
2269             }
2270             break;
2271
2272         case TVN_DELETEITEM:
2273             {
2274                 // NB: we might process this message using wxWindows event
2275                 //     tables, but due to overhead of wxWin event system we
2276                 //     prefer to do it here ourself (otherwise deleting a tree
2277                 //     with many items is just too slow)
2278                 NM_TREEVIEW* tv = (NM_TREEVIEW *)lParam;
2279
2280                 wxTreeItemId item = event.m_item;
2281                 if ( HasIndirectData(item) )
2282                 {
2283                     wxTreeItemIndirectData *data = (wxTreeItemIndirectData *)
2284                                                         tv->itemOld.lParam;
2285                     delete data; // can't be NULL here
2286
2287                     m_itemsWithIndirectData.Remove(item);
2288 #if 0
2289                     int iIndex = m_itemsWithIndirectData.Index(item);
2290                     wxASSERT( iIndex != wxNOT_FOUND) ;
2291                     m_itemsWithIndirectData.wxBaseArray::RemoveAt((size_t)iIndex);
2292 #endif
2293                 }
2294                 else
2295                 {
2296                     wxTreeItemData *data = (wxTreeItemData *)tv->itemOld.lParam;
2297                     delete data; // may be NULL, ok
2298                 }
2299
2300                 processed = TRUE; // Make sure we don't get called twice
2301             }
2302             break;
2303
2304         case TVN_BEGINLABELEDIT:
2305             // return TRUE to cancel label editing
2306             *result = !event.IsAllowed();
2307             break;
2308
2309         case TVN_ENDLABELEDIT:
2310             // return TRUE to set the label to the new string: note that we
2311             // also must pretend that we did process the message or it is going
2312             // to be passed to DefWindowProc() which will happily return FALSE
2313             // cancelling the label change
2314             *result = event.IsAllowed();
2315             processed = TRUE;
2316
2317             // ensure that we don't have the text ctrl which is going to be
2318             // deleted any more
2319             DeleteTextCtrl();
2320             break;
2321
2322         case TVN_SELCHANGING:
2323         case TVN_ITEMEXPANDING:
2324             // return TRUE to prevent the action from happening
2325             *result = !event.IsAllowed();
2326             break;
2327
2328         case TVN_GETDISPINFO:
2329             // NB: so far the user can't set the image himself anyhow, so do it
2330             //     anyway - but this may change later
2331             if ( /* !processed && */ 1 )
2332             {
2333                 wxTreeItemId item = event.m_item;
2334                 TV_DISPINFO *info = (TV_DISPINFO *)lParam;
2335                 if ( info->item.mask & TVIF_IMAGE )
2336                 {
2337                     info->item.iImage =
2338                         DoGetItemImageFromData
2339                         (
2340                          item,
2341                          IsExpanded(item) ? wxTreeItemIcon_Expanded
2342                                           : wxTreeItemIcon_Normal
2343                         );
2344                 }
2345                 if ( info->item.mask & TVIF_SELECTEDIMAGE )
2346                 {
2347                     info->item.iSelectedImage =
2348                         DoGetItemImageFromData
2349                         (
2350                          item,
2351                          IsExpanded(item) ? wxTreeItemIcon_SelectedExpanded
2352                                           : wxTreeItemIcon_Selected
2353                         );
2354                 }
2355             }
2356             break;
2357
2358         //default:
2359             // for the other messages the return value is ignored and there is
2360             // nothing special to do
2361     }
2362
2363     return processed;
2364 }
2365
2366 #endif // __WIN95__
2367