src/generic/treectrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        treectrl.cpp
   3 // Purpose:     generic tree control implementation
   4 // Author:      Robert Roebling
   5 // Created:     01/02/97
   6 // Modified:    22/10/98 - almost total rewrite, simpler interface (VZ)
   7 // Id:          $Id$
   8 // Copyright:   (c) 1998 Robert Roebling, Julian Smart and Markus Holzem
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // =============================================================================
  13 // declarations
  14 // =============================================================================
  15
  16 // -----------------------------------------------------------------------------
  17 // headers
  18 // -----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21   #pragma implementation "treectrl.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28 #pragma hdrstop
  29 #endif
  30
  31 #include "wx/generic/treectrl.h"
  32 #include "wx/generic/imaglist.h"
  33 #include "wx/settings.h"
  34 #include "wx/log.h"
  35 #include "wx/intl.h"
  36 #include "wx/dynarray.h"
  37 #include "wx/dcclient.h"
  38 #include "wx/msgdlg.h"
  39
  40 // -----------------------------------------------------------------------------
  41 // array types
  42 // -----------------------------------------------------------------------------
  43
  44 class WXDLLEXPORT wxGenericTreeItem;
  45
  46 WX_DEFINE_ARRAY(wxGenericTreeItem *, wxArrayTreeItems);
  47
  48 // -----------------------------------------------------------------------------
  49 // private classes
  50 // -----------------------------------------------------------------------------
  51
  52 // a tree item
  53 class WXDLLEXPORT wxGenericTreeItem
  54 {
  55 public:
  56   // ctors & dtor
  57   wxGenericTreeItem() { m_data = NULL; }
  58   wxGenericTreeItem( wxGenericTreeItem *parent,
  59                      const wxString& text,
  60                      wxDC& dc,
  61                      int image, int selImage,
  62                      wxTreeItemData *data );
  63
  64   ~wxGenericTreeItem();
  65
  66   // trivial accessors
  67   wxArrayTreeItems& GetChildren() { return m_children; }
  68
  69   const wxString& GetText() const { return m_text; }
  70   int GetImage() const { return m_image; }
  71   int GetSelectedImage() const { return m_selImage; }
  72   wxTreeItemData *GetData() const { return m_data; }
  73
  74   void SetText( const wxString &text, wxDC& dc );
  75   void SetImage(int image) { m_image = image; }
  76   void SetSelectedImage(int image) { m_selImage = image; }
  77   void SetData(wxTreeItemData *data) { m_data = data; }
  78
  79   void SetHasPlus(bool has = TRUE) { m_hasPlus = has; }
  80
  81   void SetBold(bool bold) { m_isBold = bold; }
  82
  83   int GetX() const { return m_x; }
  84   int GetY() const { return m_y; }
  85
  86   void SetHeight(int h) { m_height = h; }
  87
  88   void SetX(int x) { m_x = x; }
  89   void SetY(int y) { m_y = y; }
  90
  91   wxGenericTreeItem *GetParent() const { return m_parent; }
  92
  93   // operations
  94     // deletes all children notifying the treectrl about it if !NULL pointer
  95     // given
  96   void DeleteChildren(wxTreeCtrl *tree = NULL);
  97     // FIXME don't know what is it for
  98   void Reset();
  99
 100   // get count of all children (and grand children if 'recursively')
 101   size_t GetChildrenCount(bool recursively = TRUE) const;
 102
 103   void Insert(wxGenericTreeItem *child, size_t index)
 104     { m_children.Insert(child, index); }
 105
 106   void SetCross( int x, int y );
 107   void GetSize( int &x, int &y );
 108
 109   // return the item at given position (or NULL if no item), onButton is TRUE
 110   // if the point belongs to the item's button, otherwise it lies on the
 111   // button's label
 112   wxGenericTreeItem *HitTest( const wxPoint& point, bool &onButton );
 113
 114   void Expand() { m_isCollapsed = FALSE; }
 115   void Collapse() { m_isCollapsed = TRUE; }
 116
 117   void SetHilight( bool set = TRUE ) { m_hasHilight = set; }
 118
 119   // status inquiries
 120   bool HasChildren() const { return !m_children.IsEmpty(); }
 121   bool HasHilight()  const { return m_hasHilight; }
 122   bool IsExpanded()  const { return !m_isCollapsed; }
 123   bool HasPlus()     const { return m_hasPlus || HasChildren(); }
 124   bool IsBold()      const { return m_isBold; }
 125
 126 private:
 127   wxString            m_text;
 128
 129   int                 m_image,
 130                       m_selImage;
 131
 132   wxTreeItemData     *m_data;
 133
 134   // use bitfields to save size
 135   int                 m_isCollapsed :1;
 136   int                 m_hasHilight  :1; // same as focused
 137   int                 m_hasPlus     :1; // used for item which doesn't have
 138                                         // children but still has a [+] button
 139   int                 m_isBold      :1; // render the label in bold font
 140
 141   int                 m_x, m_y;
 142   long                m_height, m_width;
 143   int                 m_xCross, m_yCross;
 144   int                 m_level;
 145   wxArrayTreeItems    m_children;
 146   wxGenericTreeItem  *m_parent;
 147 };
 148
 149 // =============================================================================
 150 // implementation
 151 // =============================================================================
 152
 153 // -----------------------------------------------------------------------------
 154 // wxTreeEvent
 155 // -----------------------------------------------------------------------------
 156
 157 IMPLEMENT_DYNAMIC_CLASS(wxTreeEvent, wxNotifyEvent)
 158
 159 wxTreeEvent::wxTreeEvent( wxEventType commandType, int id )
 160            : wxNotifyEvent( commandType, id )
 161 {
 162   m_code = 0;
 163   m_itemOld = (wxGenericTreeItem *)NULL;
 164 }
 165
 166 // -----------------------------------------------------------------------------
 167 // wxGenericTreeItem
 168 // -----------------------------------------------------------------------------
 169
 170 wxGenericTreeItem::wxGenericTreeItem(wxGenericTreeItem *parent,
 171                                      const wxString& text,
 172                                      wxDC& dc,
 173                                      int image, int selImage,
 174                                      wxTreeItemData *data)
 175                  : m_text(text)
 176 {
 177   m_image = image;
 178   m_selImage = selImage;
 179   m_data = data;
 180   m_x = m_y = 0;
 181   m_xCross = m_yCross = 0;
 182
 183   m_level = 0;
 184
 185   m_isCollapsed = TRUE;
 186   m_hasHilight = FALSE;
 187   m_hasPlus = FALSE;
 188   m_isBold = FALSE;
 189
 190   m_parent = parent;
 191
 192   dc.GetTextExtent( m_text, &m_width, &m_height );
 193 }
 194
 195 wxGenericTreeItem::~wxGenericTreeItem()
 196 {
 197   delete m_data;
 198
 199   wxASSERT_MSG( m_children.IsEmpty(),
 200                 "please call DeleteChildren() before deleting the item" );
 201 }
 202
 203 void wxGenericTreeItem::DeleteChildren(wxTreeCtrl *tree)
 204 {
 205   size_t count = m_children.Count();
 206   for ( size_t n = 0; n < count; n++ )
 207   {
 208     wxGenericTreeItem *child = m_children[n];
 209     if ( tree )
 210     {
 211       tree->SendDeleteEvent(child);
 212     }
 213
 214     child->DeleteChildren(tree);
 215     delete child;
 216   }
 217
 218   m_children.Empty();
 219 }
 220
 221 void wxGenericTreeItem::SetText( const wxString &text, wxDC& dc )
 222 {
 223   m_text = text;
 224
 225   dc.GetTextExtent( m_text, &m_width, &m_height );
 226 }
 227
 228 void wxGenericTreeItem::Reset()
 229 {
 230   m_text.Empty();
 231   m_image =
 232   m_selImage = -1;
 233   m_data = NULL;
 234   m_x = m_y =
 235   m_height = m_width = 0;
 236   m_xCross =
 237   m_yCross = 0;
 238
 239   m_level = 0;
 240
 241   DeleteChildren();
 242   m_isCollapsed = TRUE;
 243
 244   m_parent = (wxGenericTreeItem *)NULL;
 245 }
 246
 247 size_t wxGenericTreeItem::GetChildrenCount(bool recursively) const
 248 {
 249   size_t count = m_children.Count();
 250   if ( !recursively )
 251     return count;
 252
 253   size_t total = count;
 254   for ( size_t n = 0; n < count; n++ )
 255   {
 256     total += m_children[n]->GetChildrenCount();
 257   }
 258
 259   return total;
 260 }
 261
 262 void wxGenericTreeItem::SetCross( int x, int y )
 263 {
 264   m_xCross = x;
 265   m_yCross = y;
 266 }
 267
 268 void wxGenericTreeItem::GetSize( int &x, int &y )
 269 {
 270   if ( y < m_y ) y = m_y;
 271   int width = m_x +  m_width;
 272   if (width > x) x = width;
 273
 274   if (IsExpanded())
 275   {
 276     size_t count = m_children.Count();
 277     for ( size_t n = 0; n < count; n++ )
 278     {
 279       m_children[n]->GetSize( x, y );
 280     }
 281   }
 282 }
 283
 284 wxGenericTreeItem *wxGenericTreeItem::HitTest( const wxPoint& point,
 285                                                bool &onButton )
 286 {
 287   if ((point.y > m_y) && (point.y < m_y + m_height))
 288   {
 289     // FIXME why +5?
 290     if ((point.x > m_xCross-5) && (point.x < m_xCross+5) &&
 291         (point.y > m_yCross-5) && (point.y < m_yCross+5) &&
 292         (IsExpanded() || HasPlus()))
 293     {
 294       onButton = TRUE;
 295       return this;
 296     }
 297
 298     int w = m_width;
 299     if (m_image != -1) w += 20;
 300
 301     if ((point.x > m_x) && (point.x < m_x+w))
 302     {
 303       onButton = FALSE;
 304       return this;
 305     }
 306   }
 307   else
 308   {
 309     if (!m_isCollapsed)
 310     {
 311       size_t count = m_children.Count();
 312       for ( size_t n = 0; n < count; n++ )
 313       {
 314         wxGenericTreeItem *res = m_children[n]->HitTest( point, onButton );
 315         if ( res != NULL )
 316           return res;
 317       }
 318     }
 319   }
 320
 321   return NULL;
 322 }
 323
 324 // -----------------------------------------------------------------------------
 325 // wxTreeCtrl implementation
 326 // -----------------------------------------------------------------------------
 327
 328 IMPLEMENT_DYNAMIC_CLASS(wxTreeCtrl, wxScrolledWindow)
 329
 330 BEGIN_EVENT_TABLE(wxTreeCtrl,wxScrolledWindow)
 331   EVT_PAINT          (wxTreeCtrl::OnPaint)
 332   EVT_MOUSE_EVENTS   (wxTreeCtrl::OnMouse)
 333   EVT_CHAR           (wxTreeCtrl::OnChar)
 334   EVT_SET_FOCUS      (wxTreeCtrl::OnSetFocus)
 335   EVT_KILL_FOCUS     (wxTreeCtrl::OnKillFocus)
 336   EVT_IDLE           (wxTreeCtrl::OnIdle)
 337 END_EVENT_TABLE()
 338
 339 // -----------------------------------------------------------------------------
 340 // construction/destruction
 341 // -----------------------------------------------------------------------------
 342 void wxTreeCtrl::Init()
 343 {
 344   m_current =
 345   m_anchor = (wxGenericTreeItem *) NULL;
 346   m_hasFocus = FALSE;
 347   m_dirty = FALSE;
 348
 349   m_xScroll = 0;
 350   m_yScroll = 0;
 351   m_lineHeight = 10;
 352   m_indent = 15;
 353
 354   m_hilightBrush = new wxBrush
 355     (
 356       wxSystemSettings::GetSystemColour(wxSYS_COLOUR_HIGHLIGHT),
 357       wxSOLID
 358     );
 359
 360   m_imageListNormal =
 361   m_imageListState = (wxImageList *) NULL;
 362
 363   m_dragCount = 0;
 364 }
 365
 366 bool wxTreeCtrl::Create(wxWindow *parent, wxWindowID id,
 367                         const wxPoint& pos, const wxSize& size,
 368                         long style,
 369             const wxValidator &validator,
 370             const wxString& name )
 371 {
 372   Init();
 373
 374   wxScrolledWindow::Create( parent, id, pos, size, style|wxHSCROLL|wxVSCROLL, name );
 375
 376   SetValidator( validator );
 377
 378   SetBackgroundColour( *wxWHITE );
 379   m_dottedPen = wxPen( *wxBLACK, 0, 0 );
 380
 381   return TRUE;
 382 }
 383
 384 wxTreeCtrl::~wxTreeCtrl()
 385 {
 386   wxDELETE( m_hilightBrush );
 387
 388   DeleteAllItems();
 389 }
 390
 391 // -----------------------------------------------------------------------------
 392 // accessors
 393 // -----------------------------------------------------------------------------
 394
 395 size_t wxTreeCtrl::GetCount() const
 396 {
 397   return m_anchor == NULL ? 0u : m_anchor->GetChildrenCount();
 398 }
 399
 400 void wxTreeCtrl::SetIndent(unsigned int indent)
 401 {
 402   m_indent = indent;
 403   Refresh();
 404 }
 405
 406 size_t wxTreeCtrl::GetChildrenCount(const wxTreeItemId& item, bool recursively)
 407 {
 408   wxCHECK_MSG( item.IsOk(), 0u, "invalid tree item" );
 409
 410   return item.m_pItem->GetChildrenCount(recursively);
 411 }
 412
 413 // -----------------------------------------------------------------------------
 414 // functions to work with tree items
 415 // -----------------------------------------------------------------------------
 416
 417 wxString wxTreeCtrl::GetItemText(const wxTreeItemId& item) const
 418 {
 419   wxCHECK_MSG( item.IsOk(), "", "invalid tree item" );
 420
 421   return item.m_pItem->GetText();
 422 }
 423
 424 int wxTreeCtrl::GetItemImage(const wxTreeItemId& item) const
 425 {
 426   wxCHECK_MSG( item.IsOk(), -1, "invalid tree item" );
 427
 428   return item.m_pItem->GetImage();
 429 }
 430
 431 int wxTreeCtrl::GetItemSelectedImage(const wxTreeItemId& item) const
 432 {
 433   wxCHECK_MSG( item.IsOk(), -1, "invalid tree item" );
 434
 435   return item.m_pItem->GetSelectedImage();
 436 }
 437
 438 wxTreeItemData *wxTreeCtrl::GetItemData(const wxTreeItemId& item) const
 439 {
 440   wxCHECK_MSG( item.IsOk(), NULL, "invalid tree item" );
 441
 442   return item.m_pItem->GetData();
 443 }
 444
 445 void wxTreeCtrl::SetItemText(const wxTreeItemId& item, const wxString& text)
 446 {
 447   wxCHECK_RET( item.IsOk(), "invalid tree item" );
 448
 449   wxClientDC dc(this);
 450   item.m_pItem->SetText(text, dc);
 451 }
 452
 453 void wxTreeCtrl::SetItemImage(const wxTreeItemId& item, int image)
 454 {
 455   wxCHECK_RET( item.IsOk(), "invalid tree item" );
 456
 457   item.m_pItem->SetImage(image);
 458 }
 459
 460 void wxTreeCtrl::SetItemSelectedImage(const wxTreeItemId& item, int image)
 461 {
 462   wxCHECK_RET( item.IsOk(), "invalid tree item" );
 463
 464   item.m_pItem->SetSelectedImage(image);
 465 }
 466
 467 void wxTreeCtrl::SetItemData(const wxTreeItemId& item, wxTreeItemData *data)
 468 {
 469   wxCHECK_RET( item.IsOk(), "invalid tree item" );
 470
 471   item.m_pItem->SetData(data);
 472 }
 473
 474 void wxTreeCtrl::SetItemHasChildren(const wxTreeItemId& item, bool has)
 475 {
 476   wxCHECK_RET( item.IsOk(), "invalid tree item" );
 477
 478   item.m_pItem->SetHasPlus(has);
 479 }
 480
 481 void wxTreeCtrl::SetItemBold(const wxTreeItemId& item, bool bold)
 482 {
 483   wxCHECK_RET( item.IsOk(), "invalid tree item" );
 484
 485   // avoid redrawing the tree if no real change
 486   wxGenericTreeItem *pItem = item.m_pItem;
 487   if ( pItem->IsBold() != bold )
 488   {
 489     pItem->SetBold(bold);
 490     RefreshLine(pItem);
 491   }
 492 }
 493
 494 // -----------------------------------------------------------------------------
 495 // item status inquiries
 496 // -----------------------------------------------------------------------------
 497
 498 bool wxTreeCtrl::IsVisible(const wxTreeItemId& WXUNUSED(item)) const
 499 {
 500   wxFAIL_MSG("not implemented");
 501
 502   return TRUE;
 503 }
 504
 505 bool wxTreeCtrl::ItemHasChildren(const wxTreeItemId& item) const
 506 {
 507   wxCHECK_MSG( item.IsOk(), FALSE, "invalid tree item" );
 508
 509   return !item.m_pItem->GetChildren().IsEmpty();
 510 }
 511
 512 bool wxTreeCtrl::IsExpanded(const wxTreeItemId& item) const
 513 {
 514   wxCHECK_MSG( item.IsOk(), FALSE, "invalid tree item" );
 515
 516   return item.m_pItem->IsExpanded();
 517 }
 518
 519 bool wxTreeCtrl::IsSelected(const wxTreeItemId& item) const
 520 {
 521   wxCHECK_MSG( item.IsOk(), FALSE, "invalid tree item" );
 522
 523   return item.m_pItem->HasHilight();
 524 }
 525
 526 bool wxTreeCtrl::IsBold(const wxTreeItemId& item) const
 527 {
 528   wxCHECK_MSG( item.IsOk(), FALSE, "invalid tree item" );
 529
 530   return item.m_pItem->IsBold();
 531 }
 532
 533 // -----------------------------------------------------------------------------
 534 // navigation
 535 // -----------------------------------------------------------------------------
 536
 537 wxTreeItemId wxTreeCtrl::GetParent(const wxTreeItemId& item) const
 538 {
 539   wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" );
 540
 541   return item.m_pItem->GetParent();
 542 }
 543
 544 wxTreeItemId wxTreeCtrl::GetFirstChild(const wxTreeItemId& item, long& cookie) const
 545 {
 546   wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" );
 547
 548   cookie = 0;
 549   return GetNextChild(item, cookie);
 550 }
 551
 552 wxTreeItemId wxTreeCtrl::GetNextChild(const wxTreeItemId& item, long& cookie) const
 553 {
 554   wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" );
 555
 556   wxArrayTreeItems& children = item.m_pItem->GetChildren();
 557   if ( (size_t)cookie < children.Count() )
 558   {
 559     return children.Item(cookie++);
 560   }
 561   else
 562   {
 563     // there are no more of them
 564     return wxTreeItemId();
 565   }
 566 }
 567
 568 wxTreeItemId wxTreeCtrl::GetLastChild(const wxTreeItemId& item) const
 569 {
 570   wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" );
 571
 572   wxArrayTreeItems& children = item.m_pItem->GetChildren();
 573   return (children.IsEmpty() ? wxTreeItemId() : wxTreeItemId(children.Last()));
 574 }
 575
 576 wxTreeItemId wxTreeCtrl::GetNextSibling(const wxTreeItemId& item) const
 577 {
 578   wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" );
 579
 580   wxGenericTreeItem *i = item.m_pItem;
 581   wxGenericTreeItem *parent = i->GetParent();
 582   if ( parent == NULL )
 583   {
 584     // root item doesn't have any siblings
 585     return wxTreeItemId();
 586   }
 587
 588   wxArrayTreeItems& siblings = parent->GetChildren();
 589   int index = siblings.Index(i);
 590   wxASSERT( index != wxNOT_FOUND ); // I'm not a child of my parent?
 591
 592   size_t n = (size_t)(index + 1);
 593   return n == siblings.Count() ? wxTreeItemId() : wxTreeItemId(siblings[n]);
 594 }
 595
 596 wxTreeItemId wxTreeCtrl::GetPrevSibling(const wxTreeItemId& item) const
 597 {
 598   wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" );
 599
 600   wxGenericTreeItem *i = item.m_pItem;
 601   wxGenericTreeItem *parent = i->GetParent();
 602   if ( parent == NULL )
 603   {
 604     // root item doesn't have any siblings
 605     return wxTreeItemId();
 606   }
 607
 608   wxArrayTreeItems& siblings = parent->GetChildren();
 609   int index = siblings.Index(i);
 610   wxASSERT( index != wxNOT_FOUND ); // I'm not a child of my parent?
 611
 612   return index == 0 ? wxTreeItemId()
 613                     : wxTreeItemId(siblings[(size_t)(index - 1)]);
 614 }
 615
 616 wxTreeItemId wxTreeCtrl::GetFirstVisibleItem() const
 617 {
 618   wxFAIL_MSG("not implemented");
 619
 620   return wxTreeItemId();
 621 }
 622
 623 wxTreeItemId wxTreeCtrl::GetNextVisible(const wxTreeItemId& item) const
 624 {
 625   wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" );
 626
 627   wxFAIL_MSG("not implemented");
 628
 629   return wxTreeItemId();
 630 }
 631
 632 wxTreeItemId wxTreeCtrl::GetPrevVisible(const wxTreeItemId& item) const
 633 {
 634   wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" );
 635
 636   wxFAIL_MSG("not implemented");
 637
 638   return wxTreeItemId();
 639 }
 640
 641 // -----------------------------------------------------------------------------
 642 // operations
 643 // -----------------------------------------------------------------------------
 644
 645 wxTreeItemId wxTreeCtrl::DoInsertItem(const wxTreeItemId& parentId,
 646                                       size_t previous,
 647                                       const wxString& text,
 648                                       int image, int selImage,
 649                                       wxTreeItemData *data)
 650 {
 651   wxGenericTreeItem *parent = parentId.m_pItem;
 652   if ( !parent )
 653   {
 654     // should we give a warning here?
 655     return AddRoot(text, image, selImage, data);
 656   }
 657
 658   wxClientDC dc(this);
 659   wxGenericTreeItem *item = new wxGenericTreeItem(parent,
 660                                                   text, dc,
 661                                                   image, selImage,
 662                                                   data);
 663
 664   if ( data != NULL )
 665   {
 666     data->m_pItem = item;
 667   }
 668
 669   parent->Insert( item, previous );
 670
 671   m_dirty = TRUE;
 672
 673   return item;
 674 }
 675
 676 wxTreeItemId wxTreeCtrl::AddRoot(const wxString& text,
 677                                  int image, int selImage,
 678                                  wxTreeItemData *data)
 679 {
 680   wxCHECK_MSG( !m_anchor, wxTreeItemId(), "tree can have only one root" );
 681
 682   wxClientDC dc(this);
 683   m_anchor = new wxGenericTreeItem((wxGenericTreeItem *)NULL, text, dc,
 684                                    image, selImage, data);
 685   if ( data != NULL )
 686   {
 687     data->m_pItem = m_anchor;
 688   }
 689
 690   AdjustMyScrollbars();
 691   Refresh();
 692
 693   return m_anchor;
 694 }
 695
 696 wxTreeItemId wxTreeCtrl::PrependItem(const wxTreeItemId& parent,
 697                                      const wxString& text,
 698                                      int image, int selImage,
 699                                      wxTreeItemData *data)
 700 {
 701   return DoInsertItem(parent, 0u, text, image, selImage, data);
 702 }
 703
 704 wxTreeItemId wxTreeCtrl::InsertItem(const wxTreeItemId& parentId,
 705                                     const wxTreeItemId& idPrevious,
 706                                     const wxString& text,
 707                                     int image, int selImage,
 708                                     wxTreeItemData *data)
 709 {
 710   wxGenericTreeItem *parent = parentId.m_pItem;
 711   if ( !parent )
 712   {
 713     // should we give a warning here?
 714     return AddRoot(text, image, selImage, data);
 715   }
 716
 717   int index = parent->GetChildren().Index(idPrevious.m_pItem);
 718   wxASSERT_MSG( index != wxNOT_FOUND,
 719                 "previous item in wxTreeCtrl::InsertItem() is not a sibling" );
 720   return DoInsertItem(parentId, (size_t)index, text, image, selImage, data);
 721 }
 722
 723 wxTreeItemId wxTreeCtrl::AppendItem(const wxTreeItemId& parentId,
 724                                     const wxString& text,
 725                                     int image, int selImage,
 726                                     wxTreeItemData *data)
 727 {
 728   wxGenericTreeItem *parent = parentId.m_pItem;
 729   if ( !parent )
 730   {
 731     // should we give a warning here?
 732     return AddRoot(text, image, selImage, data);
 733   }
 734
 735   return DoInsertItem(parent, parent->GetChildren().Count(), text,
 736                       image, selImage, data);
 737 }
 738
 739 void wxTreeCtrl::SendDeleteEvent(wxGenericTreeItem *item)
 740 {
 741   wxTreeEvent event( wxEVT_COMMAND_TREE_DELETE_ITEM, GetId() );
 742   event.m_item = item;
 743   event.SetEventObject( this );
 744   ProcessEvent( event );
 745 }
 746
 747 void wxTreeCtrl::DeleteChildren(const wxTreeItemId& itemId)
 748 {
 749     wxGenericTreeItem *item = itemId.m_pItem;
 750     item->DeleteChildren(this);
 751
 752     m_dirty = TRUE;
 753 }
 754
 755 void wxTreeCtrl::Delete(const wxTreeItemId& itemId)
 756 {
 757   wxGenericTreeItem *item = itemId.m_pItem;
 758   wxGenericTreeItem *parent = item->GetParent();
 759
 760   if ( parent )
 761   {
 762     parent->GetChildren().Remove(item);
 763   }
 764
 765   item->DeleteChildren(this);
 766   SendDeleteEvent(item);
 767   delete item;
 768
 769   m_dirty = TRUE;
 770 }
 771
 772 void wxTreeCtrl::DeleteAllItems()
 773 {
 774   if ( m_anchor )
 775   {
 776     m_anchor->DeleteChildren(this);
 777     delete m_anchor;
 778
 779     m_anchor = NULL;
 780
 781     m_dirty = TRUE;
 782   }
 783 }
 784
 785 void wxTreeCtrl::Expand(const wxTreeItemId& itemId)
 786 {
 787   wxGenericTreeItem *item = itemId.m_pItem;
 788
 789   if ( !item->HasPlus() )
 790     return;
 791
 792   if ( item->IsExpanded() )
 793     return;
 794
 795   wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_EXPANDING, GetId() );
 796   event.m_item = item;
 797   event.SetEventObject( this );
 798   if ( ProcessEvent( event ) && event.m_code )
 799   {
 800     // cancelled by program
 801     return;
 802   }
 803
 804   item->Expand();
 805   CalculatePositions();
 806
 807   RefreshSubtree(item);
 808
 809   event.SetEventType(wxEVT_COMMAND_TREE_ITEM_EXPANDED);
 810   ProcessEvent( event );
 811 }
 812
 813 void wxTreeCtrl::Collapse(const wxTreeItemId& itemId)
 814 {
 815   wxGenericTreeItem *item = itemId.m_pItem;
 816
 817   if ( !item->IsExpanded() )
 818     return;
 819
 820   wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_COLLAPSING, GetId() );
 821   event.m_item = item;
 822   event.SetEventObject( this );
 823   if ( ProcessEvent( event ) && event.m_code )
 824   {
 825     // cancelled by program
 826     return;
 827   }
 828
 829   item->Collapse();
 830
 831   wxArrayTreeItems& children = item->GetChildren();
 832   size_t count = children.Count();
 833   for ( size_t n = 0; n < count; n++ )
 834   {
 835     Collapse(children[n]);
 836   }
 837
 838   CalculatePositions();
 839
 840   RefreshSubtree(item);
 841
 842   event.SetEventType(wxEVT_COMMAND_TREE_ITEM_COLLAPSED);
 843   ProcessEvent( event );
 844 }
 845
 846 void wxTreeCtrl::CollapseAndReset(const wxTreeItemId& item)
 847 {
 848   Collapse(item);
 849   DeleteChildren(item);
 850 }
 851
 852 void wxTreeCtrl::Toggle(const wxTreeItemId& itemId)
 853 {
 854   wxGenericTreeItem *item = itemId.m_pItem;
 855
 856   if ( item->IsExpanded() )
 857     Collapse(itemId);
 858   else
 859     Expand(itemId);
 860 }
 861
 862 void wxTreeCtrl::Unselect()
 863 {
 864   if ( m_current )
 865   {
 866     m_current->SetHilight( FALSE );
 867     RefreshLine( m_current );
 868   }
 869 }
 870
 871 void wxTreeCtrl::SelectItem(const wxTreeItemId& itemId)
 872 {
 873   wxGenericTreeItem *item = itemId.m_pItem;
 874
 875   if ( m_current != item )
 876   {
 877     wxTreeEvent event( wxEVT_COMMAND_TREE_SEL_CHANGING, GetId() );
 878     event.m_item = item;
 879     event.m_itemOld = m_current;
 880     event.SetEventObject( this );
 881     if ( GetEventHandler()->ProcessEvent( event ) && event.WasVetoed() )
 882       return;
 883
 884     if ( m_current )
 885     {
 886       m_current->SetHilight( FALSE );
 887       RefreshLine( m_current );
 888     }
 889
 890     m_current = item;
 891     m_current->SetHilight( TRUE );
 892     RefreshLine( m_current );
 893
 894     event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGED);
 895     GetEventHandler()->ProcessEvent( event );
 896   }
 897 }
 898
 899 void wxTreeCtrl::EnsureVisible(const wxTreeItemId& item)
 900 {
 901     wxGenericTreeItem *gitem = item.m_pItem;
 902
 903     int item_y = gitem->GetY();
 904
 905     int start_x = 0;
 906     int start_y = 0;
 907     ViewStart( &start_x, &start_y );
 908     start_y *= 10;
 909
 910     int client_h = 0;
 911     int client_w = 0;
 912     GetClientSize( &client_w, &client_h );
 913
 914     if (item_y < start_y+3)
 915     {
 916         int x = 0;
 917         int y = 0;
 918         m_anchor->GetSize( x, y );
 919         y += 2*m_lineHeight;
 920         int x_pos = GetScrollPos( wxHORIZONTAL );
 921     SetScrollbars( 10, 10, x/10, y/10, x_pos, (item_y-client_h/2)/10 );
 922         return;
 923     }
 924
 925     if (item_y > start_y+client_h-16)
 926     {
 927        int x = 0;
 928        int y = 0;
 929        m_anchor->GetSize( x, y );
 930        y += 2*m_lineHeight;
 931        int x_pos = GetScrollPos( wxHORIZONTAL );
 932        SetScrollbars( 10, 10, x/10, y/10, x_pos, (item_y-client_h/2)/10 );
 933        return;
 934     }
 935 }
 936
 937 void wxTreeCtrl::ScrollTo(const wxTreeItemId& WXUNUSED(item))
 938 {
 939     wxFAIL_MSG("not implemented");
 940 }
 941
 942 wxTextCtrl *wxTreeCtrl::EditLabel( const wxTreeItemId& WXUNUSED(item),
 943                                    wxClassInfo* WXUNUSED(textCtrlClass) )
 944 {
 945     wxFAIL_MSG("not implemented");
 946
 947     return (wxTextCtrl*)NULL;
 948 }
 949
 950 wxTextCtrl *wxTreeCtrl::GetEditControl() const
 951 {
 952     wxFAIL_MSG("not implemented");
 953
 954     return (wxTextCtrl*)NULL;
 955 }
 956
 957 void wxTreeCtrl::EndEditLabel(const wxTreeItemId& WXUNUSED(item), bool WXUNUSED(discardChanges))
 958 {
 959     wxFAIL_MSG("not implemented");
 960 }
 961
 962 // FIXME: tree sorting functions are not reentrant and not MT-safe!
 963 static wxTreeCtrl *s_treeBeingSorted = NULL;
 964
 965 static int tree_ctrl_compare_func(wxGenericTreeItem **item1,
 966                                   wxGenericTreeItem **item2)
 967 {
 968     wxCHECK_MSG( s_treeBeingSorted, 0, "bug in wxTreeCtrl::SortChildren()" );
 969
 970     return s_treeBeingSorted->OnCompareItems(*item1, *item2);
 971 }
 972
 973 int wxTreeCtrl::OnCompareItems(const wxTreeItemId& item1,
 974                                const wxTreeItemId& item2)
 975 {
 976     return strcmp(GetItemText(item1), GetItemText(item2));
 977 }
 978
 979 void wxTreeCtrl::SortChildren(const wxTreeItemId& itemId)
 980 {
 981     wxCHECK_RET( itemId.IsOk(), "invalid tree item" );
 982
 983     wxGenericTreeItem *item = itemId.m_pItem;
 984
 985     wxCHECK_RET( !s_treeBeingSorted,
 986                  "wxTreeCtrl::SortChildren is not reentrant" );
 987
 988     wxArrayTreeItems& children = item->GetChildren();
 989     if ( children.Count() > 1 )
 990     {
 991         s_treeBeingSorted = this;
 992         children.Sort(tree_ctrl_compare_func);
 993         s_treeBeingSorted = NULL;
 994
 995         m_dirty = TRUE;
 996     }
 997     //else: don't make the tree dirty as nothing changed
 998 }
 999
1000 wxImageList *wxTreeCtrl::GetImageList() const
1001 {
1002     return m_imageListNormal;
1003 }
1004
1005 wxImageList *wxTreeCtrl::GetStateImageList() const
1006 {
1007     return m_imageListState;
1008 }
1009
1010 void wxTreeCtrl::SetImageList(wxImageList *imageList)
1011 {
1012     m_imageListNormal = imageList;
1013 }
1014
1015 void wxTreeCtrl::SetStateImageList(wxImageList *imageList)
1016 {
1017     m_imageListState = imageList;
1018 }
1019
1020 // -----------------------------------------------------------------------------
1021 // helpers
1022 // -----------------------------------------------------------------------------
1023
1024 void wxTreeCtrl::AdjustMyScrollbars()
1025 {
1026     if (m_anchor)
1027     {
1028         int x = 0;
1029         int y = 0;
1030         m_anchor->GetSize( x, y );
1031         y += 2*m_lineHeight;
1032         int x_pos = GetScrollPos( wxHORIZONTAL );
1033         int y_pos = GetScrollPos( wxVERTICAL );
1034         SetScrollbars( 10, 10, x/10, y/10, x_pos, y_pos );
1035     }
1036     else
1037     {
1038         SetScrollbars( 0, 0, 0, 0 );
1039     }
1040 }
1041
1042 void wxTreeCtrl::PaintItem(wxGenericTreeItem *item, wxDC& dc)
1043 {
1044     /* render bold items in bold */
1045     wxFont fontOld;
1046     wxFont fontNew;
1047
1048     if (item->IsBold())
1049     {
1050         fontOld = dc.GetFont();
1051         if (fontOld.Ok())
1052         {
1053           /* @@ is there any better way to make a bold variant of old font? */
1054           fontNew = wxFont( fontOld.GetPointSize(),
1055                             fontOld.GetFamily(),
1056                             fontOld.GetStyle(),
1057                             wxBOLD,
1058                             fontOld.GetUnderlined());
1059           dc.SetFont(fontNew);
1060         }
1061         else
1062         {
1063             wxFAIL_MSG("wxDC::GetFont() failed!");
1064         }
1065     }
1066
1067     long text_w = 0;
1068     long text_h = 0;
1069     dc.GetTextExtent( item->GetText(), &text_w, &text_h );
1070
1071     int image_h = 0;
1072     int image_w = 0;
1073     if ((item->IsExpanded()) && (item->GetSelectedImage() != -1))
1074     {
1075         m_imageListNormal->GetSize( item->GetSelectedImage(), image_w, image_h );
1076         image_w += 4;
1077     }
1078     else if (item->GetImage() != -1)
1079     {
1080         m_imageListNormal->GetSize( item->GetImage(), image_w, image_h );
1081         image_w += 4;
1082     }
1083
1084     dc.DrawRectangle( item->GetX()-2, item->GetY()-2, image_w+text_w+4, text_h+4 );
1085
1086     if ((item->IsExpanded()) && (item->GetSelectedImage() != -1))
1087     {
1088         dc.SetClippingRegion( item->GetX(), item->GetY(), image_w-2, text_h );
1089         m_imageListNormal->Draw( item->GetSelectedImage(), dc,
1090                                  item->GetX(), item->GetY()-1,
1091                                  wxIMAGELIST_DRAW_TRANSPARENT );
1092         dc.DestroyClippingRegion();
1093     }
1094     else if (item->GetImage() != -1)
1095     {
1096         dc.SetClippingRegion( item->GetX(), item->GetY(), image_w-2, text_h );
1097         m_imageListNormal->Draw( item->GetImage(), dc,
1098                                  item->GetX(), item->GetY()-1,
1099                                  wxIMAGELIST_DRAW_TRANSPARENT );
1100         dc.DestroyClippingRegion();
1101     }
1102
1103     dc.SetBackgroundMode(wxTRANSPARENT);
1104     dc.DrawText( item->GetText(), image_w + item->GetX(), item->GetY() );
1105
1106     /* restore normal font for bold items */
1107     if (fontOld.Ok())
1108     {
1109         dc.SetFont( fontOld);
1110     }
1111 }
1112
1113 void wxTreeCtrl::PaintLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y )
1114 {
1115     int horizX = level*m_indent;
1116
1117     item->SetX( horizX+33 );
1118     item->SetY( y-m_lineHeight/3 );
1119     item->SetHeight( m_lineHeight );
1120
1121     item->SetCross( horizX+15, y );
1122
1123     int oldY = y;
1124
1125     int exposed_x = dc.LogicalToDeviceX( 0 );
1126     int exposed_y = dc.LogicalToDeviceY( item->GetY()-2 );
1127
1128     if (IsExposed( exposed_x, exposed_y, 10000, m_lineHeight+4 ))  // 10000 = very much
1129     {
1130         int startX = horizX;
1131         int endX = horizX + 10;
1132
1133         if (!item->HasChildren()) endX += 20;
1134
1135         dc.DrawLine( startX, y, endX, y );
1136
1137         if (item->HasPlus())
1138         {
1139             dc.DrawLine( horizX+20, y, horizX+30, y );
1140             dc.SetPen( *wxGREY_PEN );
1141             dc.SetBrush( *wxWHITE_BRUSH );
1142             dc.DrawRectangle( horizX+10, y-4, 11, 9 );
1143             dc.SetPen( *wxBLACK_PEN );
1144             dc.DrawLine( horizX+13, y, horizX+18, y );
1145
1146             if (!item->IsExpanded())
1147         {
1148                 dc.DrawLine( horizX+15, y-2, horizX+15, y+3 );
1149         }
1150         }
1151
1152         if (item->HasHilight())
1153         {
1154             dc.SetTextForeground( wxSystemSettings::GetSystemColour( wxSYS_COLOUR_HIGHLIGHTTEXT ) );
1155
1156             dc.SetBrush( *m_hilightBrush );
1157
1158             if (m_hasFocus)
1159                 dc.SetPen( *wxBLACK_PEN );
1160             else
1161                 dc.SetPen( *wxTRANSPARENT_PEN );
1162
1163             PaintItem(item, dc);
1164
1165             dc.SetPen( *wxBLACK_PEN );
1166             dc.SetTextForeground( *wxBLACK );
1167             dc.SetBrush( *wxWHITE_BRUSH );
1168         }
1169         else
1170         {
1171             dc.SetBrush( *wxWHITE_BRUSH );
1172             dc.SetPen( *wxTRANSPARENT_PEN );
1173
1174             PaintItem(item, dc);
1175
1176             dc.SetPen( *wxBLACK_PEN );
1177         }
1178     }
1179
1180     if (item->IsExpanded())
1181     {
1182         int semiOldY = y;
1183
1184         wxArrayTreeItems& children = item->GetChildren();
1185         size_t count = children.Count();
1186         for ( size_t n = 0; n < count; n++ )
1187         {
1188             y += m_lineHeight;
1189             semiOldY = y;
1190             PaintLevel( children[n], dc, level+1, y );
1191         }
1192
1193         /* it may happen that the item is expanded but has no items (when you
1194          * delete all its children for example) - don't draw the vertical line
1195          * in this case */
1196         if (count > 0) dc.DrawLine( horizX+15, oldY+5, horizX+15, semiOldY );
1197     }
1198 }
1199
1200 // -----------------------------------------------------------------------------
1201 // wxWindows callbacks
1202 // -----------------------------------------------------------------------------
1203
1204 void wxTreeCtrl::OnPaint( wxPaintEvent &WXUNUSED(event) )
1205 {
1206     if ( !m_anchor )
1207         return;
1208
1209     wxPaintDC dc(this);
1210     PrepareDC( dc );
1211
1212     dc.SetFont( wxSystemSettings::GetSystemFont( wxSYS_DEFAULT_GUI_FONT ) );
1213
1214     dc.SetPen( m_dottedPen );
1215     m_lineHeight = (int)(dc.GetCharHeight() + 4);
1216
1217     int y = m_lineHeight / 2 + 2;
1218     PaintLevel( m_anchor, dc, 0, y );
1219 }
1220
1221 void wxTreeCtrl::OnSetFocus( wxFocusEvent &WXUNUSED(event) )
1222 {
1223     m_hasFocus = TRUE;
1224
1225     if (m_current) RefreshLine( m_current );
1226 }
1227
1228 void wxTreeCtrl::OnKillFocus( wxFocusEvent &WXUNUSED(event) )
1229 {
1230     m_hasFocus = FALSE;
1231
1232     if (m_current) RefreshLine( m_current );
1233 }
1234
1235 void wxTreeCtrl::OnChar( wxKeyEvent &event )
1236 {
1237     wxTreeEvent te( wxEVT_COMMAND_TREE_KEY_DOWN, GetId() );
1238     te.m_code = event.KeyCode();
1239     te.SetEventObject( this );
1240     GetEventHandler()->ProcessEvent( te );
1241
1242     if (m_current == 0)
1243     {
1244         event.Skip();
1245         return;
1246     }
1247
1248     switch (event.KeyCode())
1249     {
1250         case '+':
1251         case WXK_ADD:
1252             if (m_current->HasPlus() && !IsExpanded(m_current))
1253             {
1254                 Expand(m_current);
1255             }
1256             break;
1257
1258         case '-':
1259         case WXK_SUBTRACT:
1260             if (IsExpanded(m_current))
1261             {
1262                 Collapse(m_current);
1263             }
1264             break;
1265
1266         case '*':
1267         case WXK_MULTIPLY:
1268             Toggle(m_current);
1269             break;
1270
1271         case ' ':
1272         case WXK_RETURN:
1273             {
1274                 wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_ACTIVATED, GetId() );
1275                 event.m_item = m_current;
1276                 event.m_code = 0;
1277                 event.SetEventObject( this );
1278                 GetEventHandler()->ProcessEvent( event );
1279             }
1280             break;
1281
1282             // up goes to the previous sibling or to the last of its children if
1283             // it's expanded
1284         case WXK_UP:
1285             {
1286                 wxTreeItemId prev = GetPrevSibling( m_current );
1287                 if (!prev)
1288                 {
1289                     prev = GetParent( m_current );
1290                     long cockie = 0;
1291                     wxTreeItemId current = m_current;
1292                     if (current == GetFirstChild( prev, cockie ))
1293                     {
1294                         // otherwise we return to where we came from
1295                         SelectItem( prev );
1296                         EnsureVisible( prev );
1297                         break;
1298                     }
1299                 }
1300                 if (prev)
1301                 {
1302                     while (IsExpanded(prev))
1303                     {
1304                         int c = (int)GetChildrenCount( prev, FALSE );
1305                         long cockie = 0;
1306                         prev = GetFirstChild( prev, cockie );
1307                         for (int i = 0; i < c-1; i++)
1308                             prev = GetNextSibling( prev );
1309                     }
1310                     SelectItem( prev );
1311                     EnsureVisible( prev );
1312                 }
1313             }
1314             break;
1315
1316             // left arrow goes to the parent
1317         case WXK_LEFT:
1318             {
1319                 wxTreeItemId prev = GetParent( m_current );
1320                 if (prev)
1321                 {
1322                     EnsureVisible( prev );
1323                     SelectItem( prev );
1324                 }
1325             }
1326             break;
1327
1328         case WXK_RIGHT:
1329             // this works the same as the down arrow except that we also expand the
1330             // item if it wasn't expanded yet
1331             Expand(m_current);
1332             // fall through
1333
1334         case WXK_DOWN:
1335             {
1336                 if (IsExpanded(m_current))
1337                 {
1338                     long cookie = 0;
1339                     wxTreeItemId child = GetFirstChild( m_current, cookie );
1340                     SelectItem( child );
1341                     EnsureVisible( child );
1342                 }
1343                 else
1344                 {
1345                     wxTreeItemId next = GetNextSibling( m_current );
1346                     if (next == 0)
1347                     {
1348                         wxTreeItemId current = m_current;
1349                         while (current && !next)
1350                         {
1351                             current = GetParent( current );
1352                             if (current) next = GetNextSibling( current );
1353                         }
1354                     }
1355                     if (next != 0)
1356                     {
1357                         SelectItem( next );
1358                         EnsureVisible( next );
1359                     }
1360                 }
1361             }
1362             break;
1363
1364             // <End> selects the last visible tree item
1365         case WXK_END:
1366             {
1367                 wxTreeItemId last = GetRootItem();
1368
1369                 while ( last.IsOk() && IsExpanded(last) )
1370                 {
1371                     wxTreeItemId lastChild = GetLastChild(last);
1372
1373                     // it may happen if the item was expanded but then all of
1374                     // its children have been deleted - so IsExpanded() returned
1375                     // TRUE, but GetLastChild() returned invalid item
1376                     if ( !lastChild )
1377                         break;
1378
1379                     last = lastChild;
1380                 }
1381
1382                 if ( last.IsOk() )
1383                 {
1384                     EnsureVisible( last );
1385                     SelectItem( last );
1386                 }
1387             }
1388             break;
1389
1390             // <Home> selects the root item
1391         case WXK_HOME:
1392             {
1393                 wxTreeItemId prev = GetRootItem();
1394                 if (prev)
1395                 {
1396                     EnsureVisible( prev );
1397                     SelectItem( prev );
1398                 }
1399             }
1400             break;
1401
1402         default:
1403             event.Skip();
1404     }
1405 }
1406
1407 wxTreeItemId wxTreeCtrl::HitTest(const wxPoint& point, int& WXUNUSED(flags))
1408 {
1409     bool onButton = FALSE;
1410     return m_anchor->HitTest( point, onButton );
1411 }
1412
1413 void wxTreeCtrl::OnMouse( wxMouseEvent &event )
1414 {
1415     if (!event.LeftIsDown()) m_dragCount = 0;
1416
1417     if ( !(event.LeftDown() || event.LeftDClick() || event.Dragging()) ) return;
1418
1419     if ( !m_anchor ) return;
1420
1421     wxClientDC dc(this);
1422     PrepareDC(dc);
1423     long x = dc.DeviceToLogicalX( (long)event.GetX() );
1424     long y = dc.DeviceToLogicalY( (long)event.GetY() );
1425
1426     bool onButton = FALSE;
1427     wxGenericTreeItem *item = m_anchor->HitTest( wxPoint(x,y), onButton );
1428
1429     if (item == NULL) return;  /* we hit the blank area */
1430
1431     if (event.Dragging())
1432     {
1433         if (m_dragCount == 2)  /* small drag latency (3?) */
1434         {
1435             m_dragCount = 0;
1436
1437             wxTreeEvent nevent(wxEVT_COMMAND_TREE_BEGIN_DRAG, GetId());
1438             nevent.m_item = m_current;
1439             nevent.SetEventObject(this);
1440             GetEventHandler()->ProcessEvent(nevent);
1441         }
1442         else
1443         {
1444             m_dragCount++;
1445         }
1446         return;
1447     }
1448
1449     if (!IsSelected(item)) SelectItem(item);  /* we dont support multiple selections, BTW */
1450
1451     if (event.LeftDClick())
1452     {
1453         wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_ACTIVATED, GetId() );
1454         event.m_item = item;
1455         event.m_code = 0;
1456         event.SetEventObject( this );
1457         GetEventHandler()->ProcessEvent( event );
1458     }
1459
1460     if (onButton)
1461     {
1462         Toggle( item );
1463     }
1464 }
1465
1466 void wxTreeCtrl::OnIdle( wxIdleEvent &WXUNUSED(event) )
1467 {
1468     /* after all changes have been done to the tree control,
1469      * we actually redraw the tree when everything is over */
1470
1471     if (!m_dirty) return;
1472
1473     m_dirty = FALSE;
1474
1475     CalculatePositions();
1476
1477     AdjustMyScrollbars();
1478 }
1479
1480 // -----------------------------------------------------------------------------
1481
1482 void wxTreeCtrl::CalculateLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y )
1483 {
1484     int horizX = level*m_indent;
1485
1486     item->SetX( horizX+33 );
1487     item->SetY( y-m_lineHeight/3-2 );
1488     item->SetHeight( m_lineHeight );
1489
1490     if ( !item->IsExpanded() )
1491     {
1492         /* we dont need to calculate collapsed branches */
1493         return;
1494     }
1495
1496     wxArrayTreeItems& children = item->GetChildren();
1497     size_t count = children.Count();
1498     for ( size_t n = 0; n < count; n++ )
1499     {
1500         y += m_lineHeight;
1501         CalculateLevel( children[n], dc, level+1, y );  /* recurse */
1502     }
1503 }
1504
1505 void wxTreeCtrl::CalculatePositions()
1506 {
1507     if ( !m_anchor ) return;
1508
1509     wxClientDC dc(this);
1510     PrepareDC( dc );
1511
1512     dc.SetFont( wxSystemSettings::GetSystemFont( wxSYS_DEFAULT_GUI_FONT ) );
1513
1514     dc.SetPen( m_dottedPen );
1515     m_lineHeight = (int)(dc.GetCharHeight() + 4);
1516
1517     int y = m_lineHeight / 2 + 2;
1518     CalculateLevel( m_anchor, dc, 0, y ); /* start recursion */
1519 }
1520
1521 void wxTreeCtrl::RefreshSubtree(wxGenericTreeItem *item)
1522 {
1523     wxClientDC dc(this);
1524     PrepareDC(dc);
1525
1526     int cw = 0;
1527     int ch = 0;
1528     GetClientSize( &cw, &ch );
1529
1530     wxRect rect;
1531     rect.x = dc.LogicalToDeviceX( 0 );
1532     rect.width = cw;
1533     rect.y = dc.LogicalToDeviceY( item->GetY() );
1534     rect.height = ch;
1535
1536     Refresh( TRUE, &rect );
1537
1538     AdjustMyScrollbars();
1539 }
1540
1541 void wxTreeCtrl::RefreshLine( wxGenericTreeItem *item )
1542 {
1543     wxClientDC dc(this);
1544     PrepareDC( dc );
1545
1546     wxRect rect;
1547     rect.x = dc.LogicalToDeviceX( item->GetX() - 2 );
1548     rect.y = dc.LogicalToDeviceY( item->GetY() - 2 );
1549     rect.width = 1000;
1550     rect.height = dc.GetCharHeight() + 6;
1551
1552     Refresh( TRUE, &rect );
1553 }
1554