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 #include "wx/settings.h"
  49
  50 #ifdef __GNUWIN32__
  51 #ifndef wxUSE_NORLANDER_HEADERS
  52 #include "wx/msw/gnuwin32/extra.h"
  53 #endif
  54 #endif
  55
  56 #if (defined(__WIN95__) && !defined(__GNUWIN32__)) || defined(__TWIN32__) || defined(wxUSE_NORLANDER_HEADERS)
  57     #include <commctrl.h>
  58 #endif
  59
  60 // Bug in headers, sometimes
  61 #ifndef TVIS_FOCUSED
  62     #define TVIS_FOCUSED            0x0001
  63 #endif
  64
  65 // ----------------------------------------------------------------------------
  66 // private classes
  67 // ----------------------------------------------------------------------------
  68
  69 // a convenient wrapper around TV_ITEM struct which adds a ctor
  70 #pragma warning( disable : 4097 )
  71 struct wxTreeViewItem : public TV_ITEM
  72 {
  73     wxTreeViewItem(const wxTreeItemId& item,    // the item handle
  74                    UINT mask_,                  // fields which are valid
  75                    UINT stateMask_ = 0)         // for TVIF_STATE only
  76     {
  77         // hItem member is always valid
  78         mask = mask_ | TVIF_HANDLE;
  79         stateMask = stateMask_;
  80         hItem = (HTREEITEM) (WXHTREEITEM) item;
  81     }
  82 };
  83 #pragma warning( default : 4097 )
  84
  85 // a class which encapsulates the tree traversal logic: it vists all (unless
  86 // OnVisit() returns FALSE) items under the given one
  87 class wxTreeTraversal
  88 {
  89 public:
  90     wxTreeTraversal(const wxTreeCtrl *tree)
  91     {
  92         m_tree = tree;
  93     }
  94
  95     // do traverse the tree: visit all items (recursively by default) under the
  96     // given one; return TRUE if all items were traversed or FALSE if the
  97     // traversal was aborted because OnVisit returned FALSE
  98     bool DoTraverse(const wxTreeItemId& root, bool recursively = TRUE);
  99
 100     // override this function to do whatever is needed for each item, return
 101     // FALSE to stop traversing
 102     virtual bool OnVisit(const wxTreeItemId& item) = 0;
 103
 104 protected:
 105     const wxTreeCtrl *GetTree() const { return m_tree; }
 106
 107 private:
 108     bool Traverse(const wxTreeItemId& root, bool recursively);
 109
 110     const wxTreeCtrl *m_tree;
 111 };
 112
 113 // internal class for getting the selected items
 114 class TraverseSelections : public wxTreeTraversal
 115 {
 116 public:
 117     TraverseSelections(const wxTreeCtrl *tree,
 118                        wxArrayTreeItemIds& selections)
 119         : wxTreeTraversal(tree), m_selections(selections)
 120         {
 121             m_selections.Empty();
 122
 123             DoTraverse(tree->GetRootItem());
 124         }
 125
 126     virtual bool OnVisit(const wxTreeItemId& item)
 127     {
 128         if ( GetTree()->IsItemChecked(item) )
 129         {
 130             m_selections.Add(item);
 131         }
 132
 133         return TRUE;
 134     }
 135
 136 private:
 137     wxArrayTreeItemIds& m_selections;
 138 };
 139
 140 // internal class for counting tree items
 141 class TraverseCounter : public wxTreeTraversal
 142 {
 143 public:
 144     TraverseCounter(const wxTreeCtrl *tree,
 145                     const wxTreeItemId& root,
 146                     bool recursively)
 147         : wxTreeTraversal(tree)
 148         {
 149             m_count = 0;
 150
 151             DoTraverse(root, recursively);
 152         }
 153
 154     virtual bool OnVisit(const wxTreeItemId& item)
 155     {
 156         m_count++;
 157
 158         return TRUE;
 159     }
 160
 161     size_t GetCount() const { return m_count; }
 162
 163 private:
 164     size_t m_count;
 165 };
 166
 167 // ----------------------------------------------------------------------------
 168 // This class is needed for support of different images: the Win32 common
 169 // control natively supports only 2 images (the normal one and another for the
 170 // selected state). We wish to provide support for 2 more of them for folder
 171 // items (i.e. those which have children): for expanded state and for expanded
 172 // selected state. For this we use this structure to store the additional items
 173 // images.
 174 //
 175 // There is only one problem with this: when we retrieve the item's data, we
 176 // don't know whether we get a pointer to wxTreeItemData or
 177 // wxTreeItemIndirectData. So we have to maintain a list of all items which
 178 // have indirect data inside the listctrl itself.
 179 // ----------------------------------------------------------------------------
 180 class wxTreeItemIndirectData
 181 {
 182 public:
 183     // ctor associates this data with the item and the real item data becomes
 184     // available through our GetData() method
 185     wxTreeItemIndirectData(wxTreeCtrl *tree, const wxTreeItemId& item)
 186     {
 187         for ( size_t n = 0; n < WXSIZEOF(m_images); n++ )
 188         {
 189             m_images[n] = -1;
 190         }
 191
 192         // save the old data
 193         m_data = tree->GetItemData(item);
 194
 195         // and set ourselves as the new one
 196         tree->SetIndirectItemData(item, this);
 197     }
 198
 199     // dtor deletes the associated data as well
 200     ~wxTreeItemIndirectData() { delete m_data; }
 201
 202     // accessors
 203         // get the real data associated with the item
 204     wxTreeItemData *GetData() const { return m_data; }
 205         // change it
 206     void SetData(wxTreeItemData *data) { m_data = data; }
 207
 208         // do we have such image?
 209     bool HasImage(wxTreeItemIcon which) const { return m_images[which] != -1; }
 210         // get image
 211     int GetImage(wxTreeItemIcon which) const { return m_images[which]; }
 212         // change it
 213     void SetImage(int image, wxTreeItemIcon which) { m_images[which] = image; }
 214
 215 private:
 216     // all the images associated with the item
 217     int m_images[wxTreeItemIcon_Max];
 218
 219     wxTreeItemData *m_data;
 220 };
 221
 222 // ----------------------------------------------------------------------------
 223 // macros
 224 // ----------------------------------------------------------------------------
 225
 226 #if !USE_SHARED_LIBRARY
 227     IMPLEMENT_DYNAMIC_CLASS(wxTreeCtrl, wxControl)
 228 #endif
 229
 230 // ----------------------------------------------------------------------------
 231 // variables
 232 // ----------------------------------------------------------------------------
 233
 234 // handy table for sending events
 235 static const wxEventType g_events[2][2] =
 236 {
 237     { wxEVT_COMMAND_TREE_ITEM_COLLAPSED, wxEVT_COMMAND_TREE_ITEM_COLLAPSING },
 238     { wxEVT_COMMAND_TREE_ITEM_EXPANDED,  wxEVT_COMMAND_TREE_ITEM_EXPANDING  }
 239 };
 240
 241 // ============================================================================
 242 // implementation
 243 // ============================================================================
 244
 245 // ----------------------------------------------------------------------------
 246 // tree traversal
 247 // ----------------------------------------------------------------------------
 248
 249 bool wxTreeTraversal::DoTraverse(const wxTreeItemId& root, bool recursively)
 250 {
 251     if ( !OnVisit(root) )
 252         return FALSE;
 253
 254     return Traverse(root, recursively);
 255 }
 256
 257 bool wxTreeTraversal::Traverse(const wxTreeItemId& root, bool recursively)
 258 {
 259     long cookie;
 260     wxTreeItemId child = m_tree->GetFirstChild(root, cookie);
 261     while ( child.IsOk() )
 262     {
 263         // depth first traversal
 264         if ( recursively && !Traverse(child, TRUE) )
 265             return FALSE;
 266
 267         if ( !OnVisit(child) )
 268             return FALSE;
 269
 270         child = m_tree->GetNextChild(root, cookie);
 271     }
 272
 273     return TRUE;
 274 }
 275
 276 // ----------------------------------------------------------------------------
 277 // construction and destruction
 278 // ----------------------------------------------------------------------------
 279
 280 void wxTreeCtrl::Init()
 281 {
 282     m_imageListNormal = NULL;
 283     m_imageListState = NULL;
 284     m_textCtrl = NULL;
 285 }
 286
 287 bool wxTreeCtrl::Create(wxWindow *parent,
 288                         wxWindowID id,
 289                         const wxPoint& pos,
 290                         const wxSize& size,
 291                         long style,
 292                         const wxValidator& validator,
 293                         const wxString& name)
 294 {
 295     Init();
 296
 297     if ( !CreateControl(parent, id, pos, size, style, validator, name) )
 298         return FALSE;
 299
 300     DWORD wstyle = WS_VISIBLE | WS_CHILD | WS_TABSTOP |
 301                    TVS_HASLINES | TVS_SHOWSELALWAYS;
 302
 303     if ( m_windowStyle & wxTR_HAS_BUTTONS )
 304         wstyle |= TVS_HASBUTTONS;
 305
 306     if ( m_windowStyle & wxTR_EDIT_LABELS )
 307         wstyle |= TVS_EDITLABELS;
 308
 309     if ( m_windowStyle & wxTR_LINES_AT_ROOT )
 310         wstyle |= TVS_LINESATROOT;
 311
 312 #if !defined( __GNUWIN32__ ) && !defined( __BORLANDC__ ) && !defined(wxUSE_NORLANDER_HEADERS)
 313     // we emulate the multiple selection tree controls by using checkboxes: set
 314     // up the image list we need for this if we do have multiple selections
 315 #if !defined(__VISUALC__) || (__VISUALC__ != 1010)
 316     if ( m_windowStyle & wxTR_MULTIPLE )
 317         wstyle |= TVS_CHECKBOXES;
 318 #endif
 319 #endif
 320
 321     // Create the tree control.
 322     if ( !MSWCreateControl(WC_TREEVIEW, wstyle) )
 323         return FALSE;
 324
 325     SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 326     SetForegroundColour(wxWindow::GetParent()->GetForegroundColour());
 327
 328     // VZ: this is some experimental code which may be used to get the
 329     //     TVS_CHECKBOXES style functionality for comctl32.dll < 4.71.
 330     //     AFAIK, the standard DLL does about the same thing anyhow.
 331 #if 0
 332     if ( m_windowStyle & wxTR_MULTIPLE )
 333     {
 334         wxBitmap bmp;
 335
 336         // create the DC compatible with the current screen
 337         HDC hdcMem = CreateCompatibleDC(NULL);
 338
 339         // create a mono bitmap of the standard size
 340         int x = GetSystemMetrics(SM_CXMENUCHECK);
 341         int y = GetSystemMetrics(SM_CYMENUCHECK);
 342         wxImageList imagelistCheckboxes(x, y, FALSE, 2);
 343         HBITMAP hbmpCheck = CreateBitmap(x, y,   // bitmap size
 344                                          1,      // # of color planes
 345                                          1,      // # bits needed for one pixel
 346                                          0);     // array containing colour data
 347         SelectObject(hdcMem, hbmpCheck);
 348
 349         // then draw a check mark into it
 350         RECT rect = { 0, 0, x, y };
 351         if ( !::DrawFrameControl(hdcMem, &rect,
 352                                  DFC_BUTTON,
 353                                  DFCS_BUTTONCHECK | DFCS_CHECKED) )
 354         {
 355             wxLogLastError(_T("DrawFrameControl(check)"));
 356         }
 357
 358         bmp.SetHBITMAP((WXHBITMAP)hbmpCheck);
 359         imagelistCheckboxes.Add(bmp);
 360
 361         if ( !::DrawFrameControl(hdcMem, &rect,
 362                                  DFC_BUTTON,
 363                                  DFCS_BUTTONCHECK) )
 364         {
 365             wxLogLastError(_T("DrawFrameControl(uncheck)"));
 366         }
 367
 368         bmp.SetHBITMAP((WXHBITMAP)hbmpCheck);
 369         imagelistCheckboxes.Add(bmp);
 370
 371         // clean up
 372         ::DeleteDC(hdcMem);
 373
 374         // set the imagelist
 375         SetStateImageList(&imagelistCheckboxes);
 376     }
 377 #endif // 0
 378
 379     SetSize(pos.x, pos.y, size.x, size.y);
 380
 381     return TRUE;
 382 }
 383
 384 wxTreeCtrl::~wxTreeCtrl()
 385 {
 386     DeleteTextCtrl();
 387
 388     // delete user data to prevent memory leaks
 389     DeleteAllItems();
 390 }
 391
 392 // ----------------------------------------------------------------------------
 393 // accessors
 394 // ----------------------------------------------------------------------------
 395
 396 // simple wrappers which add error checking in debug mode
 397
 398 bool wxTreeCtrl::DoGetItem(wxTreeViewItem* tvItem) const
 399 {
 400     if ( !TreeView_GetItem(GetHwnd(), tvItem) )
 401     {
 402         wxLogLastError("TreeView_GetItem");
 403
 404         return FALSE;
 405     }
 406
 407     return TRUE;
 408 }
 409
 410 void wxTreeCtrl::DoSetItem(wxTreeViewItem* tvItem)
 411 {
 412     if ( TreeView_SetItem(GetHwnd(), tvItem) == -1 )
 413     {
 414         wxLogLastError("TreeView_SetItem");
 415     }
 416 }
 417
 418 size_t wxTreeCtrl::GetCount() const
 419 {
 420     return (size_t)TreeView_GetCount(GetHwnd());
 421 }
 422
 423 unsigned int wxTreeCtrl::GetIndent() const
 424 {
 425     return TreeView_GetIndent(GetHwnd());
 426 }
 427
 428 void wxTreeCtrl::SetIndent(unsigned int indent)
 429 {
 430     TreeView_SetIndent(GetHwnd(), indent);
 431 }
 432
 433 wxImageList *wxTreeCtrl::GetImageList() const
 434 {
 435     return m_imageListNormal;
 436 }
 437
 438 wxImageList *wxTreeCtrl::GetStateImageList() const
 439 {
 440     return m_imageListNormal;
 441 }
 442
 443 void wxTreeCtrl::SetAnyImageList(wxImageList *imageList, int which)
 444 {
 445     // no error return
 446     TreeView_SetImageList(GetHwnd(),
 447                           imageList ? imageList->GetHIMAGELIST() : 0,
 448                           which);
 449 }
 450
 451 void wxTreeCtrl::SetImageList(wxImageList *imageList)
 452 {
 453     SetAnyImageList(m_imageListNormal = imageList, TVSIL_NORMAL);
 454 }
 455
 456 void wxTreeCtrl::SetStateImageList(wxImageList *imageList)
 457 {
 458     SetAnyImageList(m_imageListState = imageList, TVSIL_STATE);
 459 }
 460
 461 size_t wxTreeCtrl::GetChildrenCount(const wxTreeItemId& item,
 462                                     bool recursively) const
 463 {
 464     TraverseCounter counter(this, item, recursively);
 465
 466     return counter.GetCount();
 467 }
 468
 469 // ----------------------------------------------------------------------------
 470 // Item access
 471 // ----------------------------------------------------------------------------
 472
 473 wxString wxTreeCtrl::GetItemText(const wxTreeItemId& item) const
 474 {
 475     wxChar buf[512];  // the size is arbitrary...
 476
 477     wxTreeViewItem tvItem(item, TVIF_TEXT);
 478     tvItem.pszText = buf;
 479     tvItem.cchTextMax = WXSIZEOF(buf);
 480     if ( !DoGetItem(&tvItem) )
 481     {
 482         // don't return some garbage which was on stack, but an empty string
 483         buf[0] = _T('\0');
 484     }
 485
 486     return wxString(buf);
 487 }
 488
 489 void wxTreeCtrl::SetItemText(const wxTreeItemId& item, const wxString& text)
 490 {
 491     wxTreeViewItem tvItem(item, TVIF_TEXT);
 492     tvItem.pszText = (wxChar *)text.c_str();  // conversion is ok
 493     DoSetItem(&tvItem);
 494 }
 495
 496 int wxTreeCtrl::DoGetItemImageFromData(const wxTreeItemId& item,
 497                                        wxTreeItemIcon which) const
 498 {
 499     wxTreeViewItem tvItem(item, TVIF_PARAM);
 500     if ( !DoGetItem(&tvItem) )
 501     {
 502         return -1;
 503     }
 504
 505     return ((wxTreeItemIndirectData *)tvItem.lParam)->GetImage(which);
 506 }
 507
 508 void wxTreeCtrl::DoSetItemImageFromData(const wxTreeItemId& item,
 509                                         int image,
 510                                         wxTreeItemIcon which) const
 511 {
 512     wxTreeViewItem tvItem(item, TVIF_PARAM);
 513     if ( !DoGetItem(&tvItem) )
 514     {
 515         return;
 516     }
 517
 518     wxTreeItemIndirectData *data = ((wxTreeItemIndirectData *)tvItem.lParam);
 519
 520     data->SetImage(image, which);
 521
 522     // make sure that we have selected images as well
 523     if ( which == wxTreeItemIcon_Normal &&
 524          !data->HasImage(wxTreeItemIcon_Selected) )
 525     {
 526         data->SetImage(image, wxTreeItemIcon_Selected);
 527     }
 528
 529     if ( which == wxTreeItemIcon_Expanded &&
 530          !data->HasImage(wxTreeItemIcon_SelectedExpanded) )
 531     {
 532         data->SetImage(image, wxTreeItemIcon_SelectedExpanded);
 533     }
 534 }
 535
 536 void wxTreeCtrl::DoSetItemImages(const wxTreeItemId& item,
 537                                  int image,
 538                                  int imageSel)
 539 {
 540     wxTreeViewItem tvItem(item, TVIF_IMAGE | TVIF_SELECTEDIMAGE);
 541     tvItem.iSelectedImage = imageSel;
 542     tvItem.iImage = image;
 543     DoSetItem(&tvItem);
 544 }
 545
 546 int wxTreeCtrl::GetItemImage(const wxTreeItemId& item,
 547                              wxTreeItemIcon which) const
 548 {
 549     if ( HasIndirectData(item) )
 550     {
 551         return DoGetItemImageFromData(item, which);
 552     }
 553
 554     UINT mask;
 555     switch ( which )
 556     {
 557         default:
 558             wxFAIL_MSG( _T("unknown tree item image type") );
 559
 560         case wxTreeItemIcon_Normal:
 561             mask = TVIF_IMAGE;
 562             break;
 563
 564         case wxTreeItemIcon_Selected:
 565             mask = TVIF_SELECTEDIMAGE;
 566             break;
 567
 568         case wxTreeItemIcon_Expanded:
 569         case wxTreeItemIcon_SelectedExpanded:
 570             return -1;
 571     }
 572
 573     wxTreeViewItem tvItem(item, mask);
 574     DoGetItem(&tvItem);
 575
 576     return mask == TVIF_IMAGE ? tvItem.iImage : tvItem.iSelectedImage;
 577 }
 578
 579 void wxTreeCtrl::SetItemImage(const wxTreeItemId& item, int image,
 580                               wxTreeItemIcon which)
 581 {
 582     int imageNormal, imageSel;
 583     switch ( which )
 584     {
 585         default:
 586             wxFAIL_MSG( _T("unknown tree item image type") );
 587
 588         case wxTreeItemIcon_Normal:
 589             imageNormal = image;
 590             imageSel = GetItemSelectedImage(item);
 591             break;
 592
 593         case wxTreeItemIcon_Selected:
 594             imageNormal = GetItemImage(item);
 595             imageSel = image;
 596             break;
 597
 598         case wxTreeItemIcon_Expanded:
 599         case wxTreeItemIcon_SelectedExpanded:
 600             if ( !HasIndirectData(item) )
 601             {
 602                 // we need to get the old images first, because after we create
 603                 // the wxTreeItemIndirectData GetItemXXXImage() will use it to
 604                 // get the images
 605                 imageNormal = GetItemImage(item);
 606                 imageSel = GetItemSelectedImage(item);
 607
 608                 // if it doesn't have it yet, add it
 609                 wxTreeItemIndirectData *data = new
 610                     wxTreeItemIndirectData(this, item);
 611
 612                 // copy the data to the new location
 613                 data->SetImage(imageNormal, wxTreeItemIcon_Normal);
 614                 data->SetImage(imageSel, wxTreeItemIcon_Selected);
 615             }
 616
 617             DoSetItemImageFromData(item, image, which);
 618
 619             // reset the normal/selected images because we won't use them any
 620             // more - now they're stored inside the indirect data
 621             imageNormal =
 622             imageSel = I_IMAGECALLBACK;
 623             break;
 624     }
 625
 626     // NB: at least in version 5.00.0518.9 of comctl32.dll we need to always
 627     //     change both normal and selected image - otherwise the change simply
 628     //     doesn't take place!
 629     DoSetItemImages(item, imageNormal, imageSel);
 630 }
 631
 632 wxTreeItemData *wxTreeCtrl::GetItemData(const wxTreeItemId& item) const
 633 {
 634     wxTreeViewItem tvItem(item, TVIF_PARAM);
 635     if ( !DoGetItem(&tvItem) )
 636     {
 637         return NULL;
 638     }
 639
 640     if ( HasIndirectData(item) )
 641     {
 642         return ((wxTreeItemIndirectData *)tvItem.lParam)->GetData();
 643     }
 644     else
 645     {
 646         return (wxTreeItemData *)tvItem.lParam;
 647     }
 648 }
 649
 650 void wxTreeCtrl::SetItemData(const wxTreeItemId& item, wxTreeItemData *data)
 651 {
 652     wxTreeViewItem tvItem(item, TVIF_PARAM);
 653
 654     if ( HasIndirectData(item) )
 655     {
 656         if ( DoGetItem(&tvItem) )
 657         {
 658             ((wxTreeItemIndirectData *)tvItem.lParam)->SetData(data);
 659         }
 660         else
 661         {
 662             wxFAIL_MSG( _T("failed to change tree items data") );
 663         }
 664     }
 665     else
 666     {
 667         tvItem.lParam = (LPARAM)data;
 668         DoSetItem(&tvItem);
 669     }
 670 }
 671
 672 void wxTreeCtrl::SetIndirectItemData(const wxTreeItemId& item,
 673                                      wxTreeItemIndirectData *data)
 674 {
 675     // this should never happen because it's unnecessary and will probably lead
 676     // to crash too because the code elsewhere supposes that the pointer the
 677     // wxTreeItemIndirectData has is a real wxItemData and not
 678     // wxTreeItemIndirectData as well
 679     wxASSERT_MSG( !HasIndirectData(item), _T("setting indirect data twice?") );
 680
 681     SetItemData(item, (wxTreeItemData *)data);
 682
 683     m_itemsWithIndirectData.Add(item);
 684 }
 685
 686 bool wxTreeCtrl::HasIndirectData(const wxTreeItemId& item) const
 687 {
 688     return m_itemsWithIndirectData.Index(item) != wxNOT_FOUND;
 689 }
 690
 691 void wxTreeCtrl::SetItemHasChildren(const wxTreeItemId& item, bool has)
 692 {
 693     wxTreeViewItem tvItem(item, TVIF_CHILDREN);
 694     tvItem.cChildren = (int)has;
 695     DoSetItem(&tvItem);
 696 }
 697
 698 void wxTreeCtrl::SetItemBold(const wxTreeItemId& item, bool bold)
 699 {
 700     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_BOLD);
 701     tvItem.state = bold ? TVIS_BOLD : 0;
 702     DoSetItem(&tvItem);
 703 }
 704
 705 void wxTreeCtrl::SetItemDropHighlight(const wxTreeItemId& item, bool highlight)
 706 {
 707     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_DROPHILITED);
 708     tvItem.state = highlight ? TVIS_DROPHILITED : 0;
 709     DoSetItem(&tvItem);
 710 }
 711
 712 // ----------------------------------------------------------------------------
 713 // Item status
 714 // ----------------------------------------------------------------------------
 715
 716 bool wxTreeCtrl::IsVisible(const wxTreeItemId& item) const
 717 {
 718     // Bug in Gnu-Win32 headers, so don't use the macro TreeView_GetItemRect
 719     RECT rect;
 720     return SendMessage(GetHwnd(), TVM_GETITEMRECT, FALSE, (LPARAM)&rect) != 0;
 721
 722 }
 723
 724 bool wxTreeCtrl::ItemHasChildren(const wxTreeItemId& item) const
 725 {
 726     wxTreeViewItem tvItem(item, TVIF_CHILDREN);
 727     DoGetItem(&tvItem);
 728
 729     return tvItem.cChildren != 0;
 730 }
 731
 732 bool wxTreeCtrl::IsExpanded(const wxTreeItemId& item) const
 733 {
 734     // probably not a good idea to put it here
 735     //wxASSERT( ItemHasChildren(item) );
 736
 737     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_EXPANDED);
 738     DoGetItem(&tvItem);
 739
 740     return (tvItem.state & TVIS_EXPANDED) != 0;
 741 }
 742
 743 bool wxTreeCtrl::IsSelected(const wxTreeItemId& item) const
 744 {
 745     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_SELECTED);
 746     DoGetItem(&tvItem);
 747
 748     return (tvItem.state & TVIS_SELECTED) != 0;
 749 }
 750
 751 bool wxTreeCtrl::IsBold(const wxTreeItemId& item) const
 752 {
 753     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_BOLD);
 754     DoGetItem(&tvItem);
 755
 756     return (tvItem.state & TVIS_BOLD) != 0;
 757 }
 758
 759 // ----------------------------------------------------------------------------
 760 // navigation
 761 // ----------------------------------------------------------------------------
 762
 763 wxTreeItemId wxTreeCtrl::GetRootItem() const
 764 {
 765     return wxTreeItemId((WXHTREEITEM) TreeView_GetRoot(GetHwnd()));
 766 }
 767
 768 wxTreeItemId wxTreeCtrl::GetSelection() const
 769 {
 770     wxCHECK_MSG( !(m_windowStyle & wxTR_MULTIPLE), (WXHTREEITEM)0,
 771                  _T("this only works with single selection controls") );
 772
 773     return wxTreeItemId((WXHTREEITEM) TreeView_GetSelection(GetHwnd()));
 774 }
 775
 776 wxTreeItemId wxTreeCtrl::GetParent(const wxTreeItemId& item) const
 777 {
 778     return wxTreeItemId((WXHTREEITEM) TreeView_GetParent(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item));
 779 }
 780
 781 wxTreeItemId wxTreeCtrl::GetFirstChild(const wxTreeItemId& item,
 782                                        long& _cookie) const
 783 {
 784     // remember the last child returned in 'cookie'
 785     _cookie = (long)TreeView_GetChild(GetHwnd(), (HTREEITEM) (WXHTREEITEM)item);
 786
 787     return wxTreeItemId((WXHTREEITEM)_cookie);
 788 }
 789
 790 wxTreeItemId wxTreeCtrl::GetNextChild(const wxTreeItemId& WXUNUSED(item),
 791                                       long& _cookie) const
 792 {
 793     wxTreeItemId l = wxTreeItemId((WXHTREEITEM)TreeView_GetNextSibling(GetHwnd(),
 794                                    (HTREEITEM)(WXHTREEITEM)_cookie));
 795     _cookie = (long)l;
 796
 797     return l;
 798 }
 799
 800 wxTreeItemId wxTreeCtrl::GetLastChild(const wxTreeItemId& item) const
 801 {
 802     // can this be done more efficiently?
 803     long cookie;
 804
 805     wxTreeItemId childLast,
 806     child = GetFirstChild(item, cookie);
 807     while ( child.IsOk() )
 808     {
 809         childLast = child;
 810         child = GetNextChild(item, cookie);
 811     }
 812
 813     return childLast;
 814 }
 815
 816 wxTreeItemId wxTreeCtrl::GetNextSibling(const wxTreeItemId& item) const
 817 {
 818     return wxTreeItemId((WXHTREEITEM) TreeView_GetNextSibling(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item));
 819 }
 820
 821 wxTreeItemId wxTreeCtrl::GetPrevSibling(const wxTreeItemId& item) const
 822 {
 823     return wxTreeItemId((WXHTREEITEM) TreeView_GetPrevSibling(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item));
 824 }
 825
 826 wxTreeItemId wxTreeCtrl::GetFirstVisibleItem() const
 827 {
 828     return wxTreeItemId((WXHTREEITEM) TreeView_GetFirstVisible(GetHwnd()));
 829 }
 830
 831 wxTreeItemId wxTreeCtrl::GetNextVisible(const wxTreeItemId& item) const
 832 {
 833     wxASSERT_MSG( IsVisible(item), _T("The item you call GetNextVisible() "
 834                                       "for must be visible itself!"));
 835
 836     return wxTreeItemId((WXHTREEITEM) TreeView_GetNextVisible(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item));
 837 }
 838
 839 wxTreeItemId wxTreeCtrl::GetPrevVisible(const wxTreeItemId& item) const
 840 {
 841     wxASSERT_MSG( IsVisible(item), _T("The item you call GetPrevVisible() "
 842                                       "for must be visible itself!"));
 843
 844     return wxTreeItemId((WXHTREEITEM) TreeView_GetPrevVisible(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item));
 845 }
 846
 847 // ----------------------------------------------------------------------------
 848 // multiple selections emulation
 849 // ----------------------------------------------------------------------------
 850
 851 bool wxTreeCtrl::IsItemChecked(const wxTreeItemId& item) const
 852 {
 853     // receive the desired information.
 854     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_STATEIMAGEMASK);
 855     DoGetItem(&tvItem);
 856
 857     // state image indices are 1 based
 858     return ((tvItem.state >> 12) - 1) == 1;
 859 }
 860
 861 void wxTreeCtrl::SetItemCheck(const wxTreeItemId& item, bool check)
 862 {
 863     // receive the desired information.
 864     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_STATEIMAGEMASK);
 865
 866     // state images are one-based
 867     tvItem.state = (check ? 2 : 1) << 12;
 868
 869     DoSetItem(&tvItem);
 870 }
 871
 872 size_t wxTreeCtrl::GetSelections(wxArrayTreeItemIds& selections) const
 873 {
 874     TraverseSelections selector(this, selections);
 875
 876     return selections.GetCount();
 877 }
 878
 879 // ----------------------------------------------------------------------------
 880 // Usual operations
 881 // ----------------------------------------------------------------------------
 882
 883 wxTreeItemId wxTreeCtrl::DoInsertItem(const wxTreeItemId& parent,
 884                                       wxTreeItemId hInsertAfter,
 885                                       const wxString& text,
 886                                       int image, int selectedImage,
 887                                       wxTreeItemData *data)
 888 {
 889     TV_INSERTSTRUCT tvIns;
 890     tvIns.hParent = (HTREEITEM) (WXHTREEITEM)parent;
 891     tvIns.hInsertAfter = (HTREEITEM) (WXHTREEITEM) hInsertAfter;
 892
 893     // this is how we insert the item as the first child: supply a NULL
 894     // hInsertAfter
 895     if ( !tvIns.hInsertAfter )
 896     {
 897         tvIns.hInsertAfter = TVI_FIRST;
 898     }
 899
 900     UINT mask = 0;
 901     if ( !text.IsEmpty() )
 902     {
 903         mask |= TVIF_TEXT;
 904         tvIns.item.pszText = (wxChar *)text.c_str();  // cast is ok
 905     }
 906
 907     if ( image != -1 )
 908     {
 909         mask |= TVIF_IMAGE;
 910         tvIns.item.iImage = image;
 911
 912         if ( selectedImage == -1 )
 913         {
 914             // take the same image for selected icon if not specified
 915             selectedImage = image;
 916         }
 917     }
 918
 919     if ( selectedImage != -1 )
 920     {
 921         mask |= TVIF_SELECTEDIMAGE;
 922         tvIns.item.iSelectedImage = selectedImage;
 923     }
 924
 925     if ( data != NULL )
 926     {
 927         mask |= TVIF_PARAM;
 928         tvIns.item.lParam = (LPARAM)data;
 929     }
 930
 931     tvIns.item.mask = mask;
 932
 933     HTREEITEM id = (HTREEITEM) TreeView_InsertItem(GetHwnd(), &tvIns);
 934     if ( id == 0 )
 935     {
 936         wxLogLastError("TreeView_InsertItem");
 937     }
 938
 939     if ( data != NULL )
 940     {
 941         // associate the application tree item with Win32 tree item handle
 942         data->SetId((WXHTREEITEM)id);
 943     }
 944
 945     return wxTreeItemId((WXHTREEITEM)id);
 946 }
 947
 948 // for compatibility only
 949 wxTreeItemId wxTreeCtrl::InsertItem(const wxTreeItemId& parent,
 950                                     const wxString& text,
 951                                     int image, int selImage,
 952                                     long insertAfter)
 953 {
 954     return DoInsertItem(parent, (WXHTREEITEM)insertAfter, text,
 955                         image, selImage, NULL);
 956 }
 957
 958 wxTreeItemId wxTreeCtrl::AddRoot(const wxString& text,
 959                                  int image, int selectedImage,
 960                                  wxTreeItemData *data)
 961 {
 962     return DoInsertItem(wxTreeItemId((WXHTREEITEM) 0), (WXHTREEITEM) 0,
 963                         text, image, selectedImage, data);
 964 }
 965
 966 wxTreeItemId wxTreeCtrl::PrependItem(const wxTreeItemId& parent,
 967                                      const wxString& text,
 968                                      int image, int selectedImage,
 969                                      wxTreeItemData *data)
 970 {
 971     return DoInsertItem(parent, (WXHTREEITEM) TVI_FIRST,
 972                         text, image, selectedImage, data);
 973 }
 974
 975 wxTreeItemId wxTreeCtrl::InsertItem(const wxTreeItemId& parent,
 976                                     const wxTreeItemId& idPrevious,
 977                                     const wxString& text,
 978                                     int image, int selectedImage,
 979                                     wxTreeItemData *data)
 980 {
 981     return DoInsertItem(parent, idPrevious, text, image, selectedImage, data);
 982 }
 983
 984 wxTreeItemId wxTreeCtrl::AppendItem(const wxTreeItemId& parent,
 985                                     const wxString& text,
 986                                     int image, int selectedImage,
 987                                     wxTreeItemData *data)
 988 {
 989     return DoInsertItem(parent, (WXHTREEITEM) TVI_LAST,
 990                         text, image, selectedImage, data);
 991 }
 992
 993 void wxTreeCtrl::Delete(const wxTreeItemId& item)
 994 {
 995     if ( !TreeView_DeleteItem(GetHwnd(), (HTREEITEM)(WXHTREEITEM)item) )
 996     {
 997         wxLogLastError("TreeView_DeleteItem");
 998     }
 999 }
1000
1001 // delete all children (but don't delete the item itself)
1002 void wxTreeCtrl::DeleteChildren(const wxTreeItemId& item)
1003 {
1004     long cookie;
1005
1006     wxArrayLong children;
1007     wxTreeItemId child = GetFirstChild(item, cookie);
1008     while ( child.IsOk() )
1009     {
1010         children.Add((long)(WXHTREEITEM)child);
1011
1012         child = GetNextChild(item, cookie);
1013     }
1014
1015     size_t nCount = children.Count();
1016     for ( size_t n = 0; n < nCount; n++ )
1017     {
1018         if ( !TreeView_DeleteItem(GetHwnd(), (HTREEITEM)children[n]) )
1019         {
1020             wxLogLastError("TreeView_DeleteItem");
1021         }
1022     }
1023 }
1024
1025 void wxTreeCtrl::DeleteAllItems()
1026 {
1027     if ( !TreeView_DeleteAllItems(GetHwnd()) )
1028     {
1029         wxLogLastError("TreeView_DeleteAllItems");
1030     }
1031 }
1032
1033 void wxTreeCtrl::DoExpand(const wxTreeItemId& item, int flag)
1034 {
1035     wxASSERT_MSG( flag == TVE_COLLAPSE ||
1036                   flag == (TVE_COLLAPSE | TVE_COLLAPSERESET) ||
1037                   flag == TVE_EXPAND   ||
1038                   flag == TVE_TOGGLE,
1039                   _T("Unknown flag in wxTreeCtrl::DoExpand") );
1040
1041     // TreeView_Expand doesn't send TVN_ITEMEXPAND(ING) messages, so we must
1042     // emulate them. This behaviour has changed slightly with comctl32.dll
1043     // v 4.70 - now it does send them but only the first time. To maintain
1044     // compatible behaviour and also in order to not have surprises with the
1045     // future versions, don't rely on this and still do everything ourselves.
1046     // To avoid that the messages be sent twice when the item is expanded for
1047     // the first time we must clear TVIS_EXPANDEDONCE style manually.
1048
1049     wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_EXPANDEDONCE);
1050     tvItem.state = 0;
1051     DoSetItem(&tvItem);
1052
1053     if ( TreeView_Expand(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item, flag) != 0 )
1054     {
1055         wxTreeEvent event(wxEVT_NULL, m_windowId);
1056         event.m_item = item;
1057
1058         bool isExpanded = IsExpanded(item);
1059
1060         event.SetEventObject(this);
1061
1062         // FIXME return value of {EXPAND|COLLAPS}ING event handler is discarded
1063         event.SetEventType(g_events[isExpanded][TRUE]);
1064         GetEventHandler()->ProcessEvent(event);
1065
1066         event.SetEventType(g_events[isExpanded][FALSE]);
1067         GetEventHandler()->ProcessEvent(event);
1068     }
1069     //else: change didn't took place, so do nothing at all
1070 }
1071
1072 void wxTreeCtrl::Expand(const wxTreeItemId& item)
1073 {
1074     DoExpand(item, TVE_EXPAND);
1075 }
1076
1077 void wxTreeCtrl::Collapse(const wxTreeItemId& item)
1078 {
1079     DoExpand(item, TVE_COLLAPSE);
1080 }
1081
1082 void wxTreeCtrl::CollapseAndReset(const wxTreeItemId& item)
1083 {
1084     DoExpand(item, TVE_COLLAPSE | TVE_COLLAPSERESET);
1085 }
1086
1087 void wxTreeCtrl::Toggle(const wxTreeItemId& item)
1088 {
1089     DoExpand(item, TVE_TOGGLE);
1090 }
1091
1092 void wxTreeCtrl::ExpandItem(const wxTreeItemId& item, int action)
1093 {
1094     DoExpand(item, action);
1095 }
1096
1097 void wxTreeCtrl::Unselect()
1098 {
1099     wxASSERT_MSG( !(m_windowStyle & wxTR_MULTIPLE), _T("doesn't make sense") );
1100
1101     // just remove the selection
1102     SelectItem(wxTreeItemId((WXHTREEITEM) 0));
1103 }
1104
1105 void wxTreeCtrl::UnselectAll()
1106 {
1107     if ( m_windowStyle & wxTR_MULTIPLE )
1108     {
1109         wxArrayTreeItemIds selections;
1110         size_t count = GetSelections(selections);
1111         for ( size_t n = 0; n < count; n++ )
1112         {
1113             SetItemCheck(selections[n], FALSE);
1114         }
1115     }
1116     else
1117     {
1118         // just remove the selection
1119         Unselect();
1120     }
1121 }
1122
1123 void wxTreeCtrl::SelectItem(const wxTreeItemId& item)
1124 {
1125     if ( m_windowStyle & wxTR_MULTIPLE )
1126     {
1127         // selecting the item means checking it
1128         SetItemCheck(item);
1129     }
1130     else
1131     {
1132         // inspite of the docs (MSDN Jan 99 edition), we don't seem to receive
1133         // the notification from the control (i.e. TVN_SELCHANG{ED|ING}), so
1134         // send them ourselves
1135
1136         wxTreeEvent event(wxEVT_NULL, m_windowId);
1137         event.m_item = item;
1138         event.SetEventObject(this);
1139
1140         event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGING);
1141         if ( !GetEventHandler()->ProcessEvent(event) || event.IsAllowed() )
1142         {
1143             if ( !TreeView_SelectItem(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item) )
1144             {
1145                 wxLogLastError("TreeView_SelectItem");
1146             }
1147             else
1148             {
1149                 event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGED);
1150                 (void)GetEventHandler()->ProcessEvent(event);
1151             }
1152         }
1153         //else: program vetoed the change
1154     }
1155 }
1156
1157 void wxTreeCtrl::EnsureVisible(const wxTreeItemId& item)
1158 {
1159     // no error return
1160     TreeView_EnsureVisible(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item);
1161 }
1162
1163 void wxTreeCtrl::ScrollTo(const wxTreeItemId& item)
1164 {
1165     if ( !TreeView_SelectSetFirstVisible(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item) )
1166     {
1167         wxLogLastError("TreeView_SelectSetFirstVisible");
1168     }
1169 }
1170
1171 wxTextCtrl* wxTreeCtrl::GetEditControl() const
1172 {
1173     return m_textCtrl;
1174 }
1175
1176 void wxTreeCtrl::DeleteTextCtrl()
1177 {
1178     if ( m_textCtrl )
1179     {
1180         m_textCtrl->UnsubclassWin();
1181         m_textCtrl->SetHWND(0);
1182         delete m_textCtrl;
1183         m_textCtrl = NULL;
1184     }
1185 }
1186
1187 wxTextCtrl* wxTreeCtrl::EditLabel(const wxTreeItemId& item,
1188                                   wxClassInfo* textControlClass)
1189 {
1190     wxASSERT( textControlClass->IsKindOf(CLASSINFO(wxTextCtrl)) );
1191
1192     HWND hWnd = (HWND) TreeView_EditLabel(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item);
1193
1194     // this is not an error - the TVN_BEGINLABELEDIT handler might have
1195     // returned FALSE
1196     if ( !hWnd )
1197     {
1198         return NULL;
1199     }
1200
1201     DeleteTextCtrl();
1202
1203     m_textCtrl = (wxTextCtrl *)textControlClass->CreateObject();
1204     m_textCtrl->SetHWND((WXHWND)hWnd);
1205     m_textCtrl->SubclassWin((WXHWND)hWnd);
1206
1207     return m_textCtrl;
1208 }
1209
1210 // End label editing, optionally cancelling the edit
1211 void wxTreeCtrl::EndEditLabel(const wxTreeItemId& item, bool discardChanges)
1212 {
1213     TreeView_EndEditLabelNow(GetHwnd(), discardChanges);
1214
1215     DeleteTextCtrl();
1216 }
1217
1218 wxTreeItemId wxTreeCtrl::HitTest(const wxPoint& point, int& flags)
1219 {
1220     TV_HITTESTINFO hitTestInfo;
1221     hitTestInfo.pt.x = (int)point.x;
1222     hitTestInfo.pt.y = (int)point.y;
1223
1224     TreeView_HitTest(GetHwnd(), &hitTestInfo);
1225
1226     flags = 0;
1227
1228     // avoid repetition
1229     #define TRANSLATE_FLAG(flag) if ( hitTestInfo.flags & TVHT_##flag ) \
1230                                     flags |= wxTREE_HITTEST_##flag
1231
1232     TRANSLATE_FLAG(ABOVE);
1233     TRANSLATE_FLAG(BELOW);
1234     TRANSLATE_FLAG(NOWHERE);
1235     TRANSLATE_FLAG(ONITEMBUTTON);
1236     TRANSLATE_FLAG(ONITEMICON);
1237     TRANSLATE_FLAG(ONITEMINDENT);
1238     TRANSLATE_FLAG(ONITEMLABEL);
1239     TRANSLATE_FLAG(ONITEMRIGHT);
1240     TRANSLATE_FLAG(ONITEMSTATEICON);
1241     TRANSLATE_FLAG(TOLEFT);
1242     TRANSLATE_FLAG(TORIGHT);
1243
1244     #undef TRANSLATE_FLAG
1245
1246     return wxTreeItemId((WXHTREEITEM) hitTestInfo.hItem);
1247 }
1248
1249 bool wxTreeCtrl::GetBoundingRect(const wxTreeItemId& item,
1250                                  wxRect& rect,
1251                                  bool textOnly) const
1252 {
1253     RECT rc;
1254     if ( TreeView_GetItemRect(GetHwnd(), (HTREEITEM)(WXHTREEITEM)item,
1255                               &rc, textOnly) )
1256     {
1257         rect = wxRect(wxPoint(rc.left, rc.top), wxPoint(rc.right, rc.bottom));
1258
1259         return TRUE;
1260     }
1261     else
1262     {
1263         // couldn't retrieve rect: for example, item isn't visible
1264         return FALSE;
1265     }
1266 }
1267
1268 // ----------------------------------------------------------------------------
1269 // sorting stuff
1270 // ----------------------------------------------------------------------------
1271
1272 static int CALLBACK TreeView_CompareCallback(wxTreeItemData *pItem1,
1273                                              wxTreeItemData *pItem2,
1274                                              wxTreeCtrl *tree)
1275 {
1276     wxCHECK_MSG( pItem1 && pItem2, 0,
1277                  _T("sorting tree without data doesn't make sense") );
1278
1279     return tree->OnCompareItems(pItem1->GetId(), pItem2->GetId());
1280 }
1281
1282 int wxTreeCtrl::OnCompareItems(const wxTreeItemId& item1,
1283                                const wxTreeItemId& item2)
1284 {
1285     return wxStrcmp(GetItemText(item1), GetItemText(item2));
1286 }
1287
1288 void wxTreeCtrl::SortChildren(const wxTreeItemId& item)
1289 {
1290     // rely on the fact that TreeView_SortChildren does the same thing as our
1291     // default behaviour, i.e. sorts items alphabetically and so call it
1292     // directly if we're not in derived class (much more efficient!)
1293     if ( GetClassInfo() == CLASSINFO(wxTreeCtrl) )
1294     {
1295         TreeView_SortChildren(GetHwnd(), (HTREEITEM)(WXHTREEITEM)item, 0);
1296     }
1297     else
1298     {
1299         TV_SORTCB tvSort;
1300         tvSort.hParent = (HTREEITEM)(WXHTREEITEM)item;
1301         tvSort.lpfnCompare = (PFNTVCOMPARE)TreeView_CompareCallback;
1302         tvSort.lParam = (LPARAM)this;
1303         TreeView_SortChildrenCB(GetHwnd(), &tvSort, 0 /* reserved */);
1304     }
1305 }
1306
1307 // ----------------------------------------------------------------------------
1308 // implementation
1309 // ----------------------------------------------------------------------------
1310
1311 bool wxTreeCtrl::MSWCommand(WXUINT cmd, WXWORD id)
1312 {
1313     if ( cmd == EN_UPDATE )
1314     {
1315         wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, id);
1316         event.SetEventObject( this );
1317         ProcessCommand(event);
1318     }
1319     else if ( cmd == EN_KILLFOCUS )
1320     {
1321         wxCommandEvent event(wxEVT_KILL_FOCUS, id);
1322         event.SetEventObject( this );
1323         ProcessCommand(event);
1324     }
1325     else
1326     {
1327         // nothing done
1328         return FALSE;
1329     }
1330
1331     // command processed
1332     return TRUE;
1333 }
1334
1335 // process WM_NOTIFY Windows message
1336 bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1337 {
1338     wxTreeEvent event(wxEVT_NULL, m_windowId);
1339     wxEventType eventType = wxEVT_NULL;
1340     NMHDR *hdr = (NMHDR *)lParam;
1341
1342     switch ( hdr->code )
1343     {
1344         case TVN_BEGINDRAG:
1345             eventType = wxEVT_COMMAND_TREE_BEGIN_DRAG;
1346             // fall through
1347
1348         case TVN_BEGINRDRAG:
1349             {
1350                 if ( eventType == wxEVT_NULL )
1351                     eventType = wxEVT_COMMAND_TREE_BEGIN_RDRAG;
1352                 //else: left drag, already set above
1353
1354                 NM_TREEVIEW *tv = (NM_TREEVIEW *)lParam;
1355
1356                 event.m_item = (WXHTREEITEM) tv->itemNew.hItem;
1357                 event.m_pointDrag = wxPoint(tv->ptDrag.x, tv->ptDrag.y);
1358                 break;
1359             }
1360
1361         case TVN_BEGINLABELEDIT:
1362             {
1363                 eventType = wxEVT_COMMAND_TREE_BEGIN_LABEL_EDIT;
1364                 TV_DISPINFO *info = (TV_DISPINFO *)lParam;
1365
1366                 event.m_item = (WXHTREEITEM) info->item.hItem;
1367                 event.m_label = info->item.pszText;
1368                 break;
1369             }
1370
1371         case TVN_DELETEITEM:
1372             {
1373                 eventType = wxEVT_COMMAND_TREE_DELETE_ITEM;
1374                 NM_TREEVIEW *tv = (NM_TREEVIEW *)lParam;
1375
1376                 event.m_item = (WXHTREEITEM) tv->itemOld.hItem;
1377                 break;
1378             }
1379
1380         case TVN_ENDLABELEDIT:
1381             {
1382                 eventType = wxEVT_COMMAND_TREE_END_LABEL_EDIT;
1383                 TV_DISPINFO *info = (TV_DISPINFO *)lParam;
1384
1385                 event.m_item = (WXHTREEITEM)info->item.hItem;
1386                 event.m_label = info->item.pszText;
1387                 break;
1388             }
1389
1390         case TVN_GETDISPINFO:
1391             eventType = wxEVT_COMMAND_TREE_GET_INFO;
1392             // fall through
1393
1394         case TVN_SETDISPINFO:
1395             {
1396                 if ( eventType == wxEVT_NULL )
1397                     eventType = wxEVT_COMMAND_TREE_SET_INFO;
1398                 //else: get, already set above
1399
1400                 TV_DISPINFO *info = (TV_DISPINFO *)lParam;
1401
1402                 event.m_item = (WXHTREEITEM) info->item.hItem;
1403                 break;
1404             }
1405
1406         case TVN_ITEMEXPANDING:
1407             event.m_code = FALSE;
1408             // fall through
1409
1410         case TVN_ITEMEXPANDED:
1411             {
1412                 NM_TREEVIEW* tv = (NM_TREEVIEW*)lParam;
1413
1414                 bool expand = FALSE;
1415                 switch ( tv->action )
1416                 {
1417                     case TVE_EXPAND:
1418                         expand = TRUE;
1419                         break;
1420
1421                     case TVE_COLLAPSE:
1422                         expand = FALSE;
1423                         break;
1424
1425                     default:
1426                         wxLogDebug(_T("unexpected code %d in TVN_ITEMEXPAND "
1427                                       "message"), tv->action);
1428                 }
1429
1430                 bool ing = (hdr->code == TVN_ITEMEXPANDING);
1431                 eventType = g_events[expand][ing];
1432
1433                 event.m_item = (WXHTREEITEM) tv->itemNew.hItem;
1434                 break;
1435             }
1436
1437         case TVN_KEYDOWN:
1438             {
1439                 eventType = wxEVT_COMMAND_TREE_KEY_DOWN;
1440                 TV_KEYDOWN *info = (TV_KEYDOWN *)lParam;
1441
1442                 event.m_code = wxCharCodeMSWToWX(info->wVKey);
1443
1444                 // a separate event for this case
1445                 if ( info->wVKey == VK_SPACE || info->wVKey == VK_RETURN )
1446                 {
1447                     wxTreeEvent event2(wxEVT_COMMAND_TREE_ITEM_ACTIVATED,
1448                                        m_windowId);
1449                     event2.SetEventObject(this);
1450
1451                     GetEventHandler()->ProcessEvent(event2);
1452                 }
1453                 break;
1454             }
1455
1456         case TVN_SELCHANGED:
1457             eventType = wxEVT_COMMAND_TREE_SEL_CHANGED;
1458             // fall through
1459
1460         case TVN_SELCHANGING:
1461             {
1462                 if ( eventType == wxEVT_NULL )
1463                     eventType = wxEVT_COMMAND_TREE_SEL_CHANGING;
1464                 //else: already set above
1465
1466                 NM_TREEVIEW* tv = (NM_TREEVIEW *)lParam;
1467
1468                 event.m_item = (WXHTREEITEM) tv->itemNew.hItem;
1469                 event.m_itemOld = (WXHTREEITEM) tv->itemOld.hItem;
1470                 break;
1471             }
1472
1473         default:
1474             return wxControl::MSWOnNotify(idCtrl, lParam, result);
1475     }
1476
1477     event.SetEventObject(this);
1478     event.SetEventType(eventType);
1479
1480     bool processed = GetEventHandler()->ProcessEvent(event);
1481
1482     // post processing
1483     switch ( hdr->code )
1484     {
1485         case TVN_DELETEITEM:
1486             {
1487                 // NB: we might process this message using wxWindows event
1488                 //     tables, but due to overhead of wxWin event system we
1489                 //     prefer to do it here ourself (otherwise deleting a tree
1490                 //     with many items is just too slow)
1491                 NM_TREEVIEW* tv = (NM_TREEVIEW *)lParam;
1492
1493                 wxTreeItemId item = event.m_item;
1494                 if ( HasIndirectData(item) )
1495                 {
1496                     wxTreeItemIndirectData *data = (wxTreeItemIndirectData *)
1497                                                         tv->itemOld.lParam;
1498                     delete data; // can't be NULL here
1499
1500                     m_itemsWithIndirectData.Remove(item);
1501                 }
1502                 else
1503                 {
1504                     wxTreeItemData *data = (wxTreeItemData *)tv->itemOld.lParam;
1505                     delete data; // may be NULL, ok
1506                 }
1507
1508                 processed = TRUE; // Make sure we don't get called twice
1509             }
1510             break;
1511
1512         case TVN_BEGINLABELEDIT:
1513             // return TRUE to cancel label editing
1514             *result = !event.IsAllowed();
1515             break;
1516
1517         case TVN_ENDLABELEDIT:
1518             // return TRUE to set the label to the new string
1519             *result = event.IsAllowed();
1520
1521             // ensure that we don't have the text ctrl which is going to be
1522             // deleted any more
1523             DeleteTextCtrl();
1524             break;
1525
1526         case TVN_SELCHANGING:
1527         case TVN_ITEMEXPANDING:
1528             // return TRUE to prevent the action from happening
1529             *result = !event.IsAllowed();
1530             break;
1531
1532         case TVN_GETDISPINFO:
1533             // NB: so far the user can't set the image himself anyhow, so do it
1534             //     anyway - but this may change later
1535             if ( /* !processed && */ 1 )
1536             {
1537                 wxTreeItemId item = event.m_item;
1538                 TV_DISPINFO *info = (TV_DISPINFO *)lParam;
1539                 if ( info->item.mask & TVIF_IMAGE )
1540                 {
1541                     info->item.iImage =
1542                         DoGetItemImageFromData
1543                         (
1544                          item,
1545                          IsExpanded(item) ? wxTreeItemIcon_Expanded
1546                                           : wxTreeItemIcon_Normal
1547                         );
1548                 }
1549                 if ( info->item.mask & TVIF_SELECTEDIMAGE )
1550                 {
1551                     info->item.iSelectedImage =
1552                         DoGetItemImageFromData
1553                         (
1554                          item,
1555                          IsExpanded(item) ? wxTreeItemIcon_SelectedExpanded
1556                                           : wxTreeItemIcon_Selected
1557                         );
1558                 }
1559             }
1560             break;
1561
1562         //default:
1563             // for the other messages the return value is ignored and there is
1564             // nothing special to do
1565     }
1566
1567     return processed;
1568 }
1569
1570 // ----------------------------------------------------------------------------
1571 // Tree event
1572 // ----------------------------------------------------------------------------
1573
1574 IMPLEMENT_DYNAMIC_CLASS(wxTreeEvent, wxNotifyEvent)
1575
1576 wxTreeEvent::wxTreeEvent(wxEventType commandType, int id)
1577            : wxNotifyEvent(commandType, id)
1578 {
1579     m_code = 0;
1580     m_itemOld = 0;
1581 }
1582
1583 #endif // __WIN95__
1584