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   wxGenericTreeItem *pItem = item.m_pItem;
 451   pItem->SetText(text, dc);
 452   RefreshLine(pItem);
 453 }
 454
 455 void wxTreeCtrl::SetItemImage(const wxTreeItemId& item, int image)
 456 {
 457   wxCHECK_RET( item.IsOk(), "invalid tree item" );
 458
 459   wxGenericTreeItem *pItem = item.m_pItem;
 460   pItem->SetImage(image);
 461   RefreshLine(pItem);
 462 }
 463
 464 void wxTreeCtrl::SetItemSelectedImage(const wxTreeItemId& item, int image)
 465 {
 466   wxCHECK_RET( item.IsOk(), "invalid tree item" );
 467
 468   wxGenericTreeItem *pItem = item.m_pItem;
 469   pItem->SetSelectedImage(image);
 470   RefreshLine(pItem);
 471 }
 472
 473 void wxTreeCtrl::SetItemData(const wxTreeItemId& item, wxTreeItemData *data)
 474 {
 475   wxCHECK_RET( item.IsOk(), "invalid tree item" );
 476
 477   item.m_pItem->SetData(data);
 478 }
 479
 480 void wxTreeCtrl::SetItemHasChildren(const wxTreeItemId& item, bool has)
 481 {
 482   wxCHECK_RET( item.IsOk(), "invalid tree item" );
 483
 484   wxGenericTreeItem *pItem = item.m_pItem;
 485   pItem->SetHasPlus(has);
 486   RefreshLine(pItem);
 487 }
 488
 489 void wxTreeCtrl::SetItemBold(const wxTreeItemId& item, bool bold)
 490 {
 491   wxCHECK_RET( item.IsOk(), "invalid tree item" );
 492
 493   // avoid redrawing the tree if no real change
 494   wxGenericTreeItem *pItem = item.m_pItem;
 495   if ( pItem->IsBold() != bold )
 496   {
 497     pItem->SetBold(bold);
 498     RefreshLine(pItem);
 499   }
 500 }
 501
 502 // -----------------------------------------------------------------------------
 503 // item status inquiries
 504 // -----------------------------------------------------------------------------
 505
 506 bool wxTreeCtrl::IsVisible(const wxTreeItemId& WXUNUSED(item)) const
 507 {
 508   wxFAIL_MSG("not implemented");
 509
 510   return TRUE;
 511 }
 512
 513 bool wxTreeCtrl::ItemHasChildren(const wxTreeItemId& item) const
 514 {
 515   wxCHECK_MSG( item.IsOk(), FALSE, "invalid tree item" );
 516
 517   return !item.m_pItem->GetChildren().IsEmpty();
 518 }
 519
 520 bool wxTreeCtrl::IsExpanded(const wxTreeItemId& item) const
 521 {
 522   wxCHECK_MSG( item.IsOk(), FALSE, "invalid tree item" );
 523
 524   return item.m_pItem->IsExpanded();
 525 }
 526
 527 bool wxTreeCtrl::IsSelected(const wxTreeItemId& item) const
 528 {
 529   wxCHECK_MSG( item.IsOk(), FALSE, "invalid tree item" );
 530
 531   return item.m_pItem->HasHilight();
 532 }
 533
 534 bool wxTreeCtrl::IsBold(const wxTreeItemId& item) const
 535 {
 536   wxCHECK_MSG( item.IsOk(), FALSE, "invalid tree item" );
 537
 538   return item.m_pItem->IsBold();
 539 }
 540
 541 // -----------------------------------------------------------------------------
 542 // navigation
 543 // -----------------------------------------------------------------------------
 544
 545 wxTreeItemId wxTreeCtrl::GetParent(const wxTreeItemId& item) const
 546 {
 547   wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" );
 548
 549   return item.m_pItem->GetParent();
 550 }
 551
 552 wxTreeItemId wxTreeCtrl::GetFirstChild(const wxTreeItemId& item, long& cookie) const
 553 {
 554   wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" );
 555
 556   cookie = 0;
 557   return GetNextChild(item, cookie);
 558 }
 559
 560 wxTreeItemId wxTreeCtrl::GetNextChild(const wxTreeItemId& item, long& cookie) const
 561 {
 562   wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" );
 563
 564   wxArrayTreeItems& children = item.m_pItem->GetChildren();
 565   if ( (size_t)cookie < children.Count() )
 566   {
 567     return children.Item(cookie++);
 568   }
 569   else
 570   {
 571     // there are no more of them
 572     return wxTreeItemId();
 573   }
 574 }
 575
 576 wxTreeItemId wxTreeCtrl::GetLastChild(const wxTreeItemId& item) const
 577 {
 578   wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" );
 579
 580   wxArrayTreeItems& children = item.m_pItem->GetChildren();
 581   return (children.IsEmpty() ? wxTreeItemId() : wxTreeItemId(children.Last()));
 582 }
 583
 584 wxTreeItemId wxTreeCtrl::GetNextSibling(const wxTreeItemId& item) const
 585 {
 586   wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" );
 587
 588   wxGenericTreeItem *i = item.m_pItem;
 589   wxGenericTreeItem *parent = i->GetParent();
 590   if ( parent == NULL )
 591   {
 592     // root item doesn't have any siblings
 593     return wxTreeItemId();
 594   }
 595
 596   wxArrayTreeItems& siblings = parent->GetChildren();
 597   int index = siblings.Index(i);
 598   wxASSERT( index != wxNOT_FOUND ); // I'm not a child of my parent?
 599
 600   size_t n = (size_t)(index + 1);
 601   return n == siblings.Count() ? wxTreeItemId() : wxTreeItemId(siblings[n]);
 602 }
 603
 604 wxTreeItemId wxTreeCtrl::GetPrevSibling(const wxTreeItemId& item) const
 605 {
 606   wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" );
 607
 608   wxGenericTreeItem *i = item.m_pItem;
 609   wxGenericTreeItem *parent = i->GetParent();
 610   if ( parent == NULL )
 611   {
 612     // root item doesn't have any siblings
 613     return wxTreeItemId();
 614   }
 615
 616   wxArrayTreeItems& siblings = parent->GetChildren();
 617   int index = siblings.Index(i);
 618   wxASSERT( index != wxNOT_FOUND ); // I'm not a child of my parent?
 619
 620   return index == 0 ? wxTreeItemId()
 621                     : wxTreeItemId(siblings[(size_t)(index - 1)]);
 622 }
 623
 624 wxTreeItemId wxTreeCtrl::GetFirstVisibleItem() const
 625 {
 626   wxFAIL_MSG("not implemented");
 627
 628   return wxTreeItemId();
 629 }
 630
 631 wxTreeItemId wxTreeCtrl::GetNextVisible(const wxTreeItemId& item) const
 632 {
 633   wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" );
 634
 635   wxFAIL_MSG("not implemented");
 636
 637   return wxTreeItemId();
 638 }
 639
 640 wxTreeItemId wxTreeCtrl::GetPrevVisible(const wxTreeItemId& item) const
 641 {
 642   wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" );
 643
 644   wxFAIL_MSG("not implemented");
 645
 646   return wxTreeItemId();
 647 }
 648
 649 // -----------------------------------------------------------------------------
 650 // operations
 651 // -----------------------------------------------------------------------------
 652
 653 wxTreeItemId wxTreeCtrl::DoInsertItem(const wxTreeItemId& parentId,
 654                                       size_t previous,
 655                                       const wxString& text,
 656                                       int image, int selImage,
 657                                       wxTreeItemData *data)
 658 {
 659   wxGenericTreeItem *parent = parentId.m_pItem;
 660   if ( !parent )
 661   {
 662     // should we give a warning here?
 663     return AddRoot(text, image, selImage, data);
 664   }
 665
 666   wxClientDC dc(this);
 667   wxGenericTreeItem *item = new wxGenericTreeItem(parent,
 668                                                   text, dc,
 669                                                   image, selImage,
 670                                                   data);
 671
 672   if ( data != NULL )
 673   {
 674     data->m_pItem = item;
 675   }
 676
 677   parent->Insert( item, previous );
 678
 679   m_dirty = TRUE;
 680
 681   return item;
 682 }
 683
 684 wxTreeItemId wxTreeCtrl::AddRoot(const wxString& text,
 685                                  int image, int selImage,
 686                                  wxTreeItemData *data)
 687 {
 688   wxCHECK_MSG( !m_anchor, wxTreeItemId(), "tree can have only one root" );
 689
 690   wxClientDC dc(this);
 691   m_anchor = new wxGenericTreeItem((wxGenericTreeItem *)NULL, text, dc,
 692                                    image, selImage, data);
 693   if ( data != NULL )
 694   {
 695     data->m_pItem = m_anchor;
 696   }
 697
 698   AdjustMyScrollbars();
 699   Refresh();
 700
 701   return m_anchor;
 702 }
 703
 704 wxTreeItemId wxTreeCtrl::PrependItem(const wxTreeItemId& parent,
 705                                      const wxString& text,
 706                                      int image, int selImage,
 707                                      wxTreeItemData *data)
 708 {
 709   return DoInsertItem(parent, 0u, text, image, selImage, data);
 710 }
 711
 712 wxTreeItemId wxTreeCtrl::InsertItem(const wxTreeItemId& parentId,
 713                                     const wxTreeItemId& idPrevious,
 714                                     const wxString& text,
 715                                     int image, int selImage,
 716                                     wxTreeItemData *data)
 717 {
 718   wxGenericTreeItem *parent = parentId.m_pItem;
 719   if ( !parent )
 720   {
 721     // should we give a warning here?
 722     return AddRoot(text, image, selImage, data);
 723   }
 724
 725   int index = parent->GetChildren().Index(idPrevious.m_pItem);
 726   wxASSERT_MSG( index != wxNOT_FOUND,
 727                 "previous item in wxTreeCtrl::InsertItem() is not a sibling" );
 728   return DoInsertItem(parentId, (size_t)index, text, image, selImage, data);
 729 }
 730
 731 wxTreeItemId wxTreeCtrl::AppendItem(const wxTreeItemId& parentId,
 732                                     const wxString& text,
 733                                     int image, int selImage,
 734                                     wxTreeItemData *data)
 735 {
 736   wxGenericTreeItem *parent = parentId.m_pItem;
 737   if ( !parent )
 738   {
 739     // should we give a warning here?
 740     return AddRoot(text, image, selImage, data);
 741   }
 742
 743   return DoInsertItem(parent, parent->GetChildren().Count(), text,
 744                       image, selImage, data);
 745 }
 746
 747 void wxTreeCtrl::SendDeleteEvent(wxGenericTreeItem *item)
 748 {
 749   wxTreeEvent event( wxEVT_COMMAND_TREE_DELETE_ITEM, GetId() );
 750   event.m_item = item;
 751   event.SetEventObject( this );
 752   ProcessEvent( event );
 753 }
 754
 755 void wxTreeCtrl::DeleteChildren(const wxTreeItemId& itemId)
 756 {
 757     wxGenericTreeItem *item = itemId.m_pItem;
 758     item->DeleteChildren(this);
 759
 760     m_dirty = TRUE;
 761 }
 762
 763 void wxTreeCtrl::Delete(const wxTreeItemId& itemId)
 764 {
 765   wxGenericTreeItem *item = itemId.m_pItem;
 766   wxGenericTreeItem *parent = item->GetParent();
 767
 768   if ( parent )
 769   {
 770     parent->GetChildren().Remove(item);
 771   }
 772
 773   item->DeleteChildren(this);
 774   SendDeleteEvent(item);
 775   delete item;
 776
 777   m_dirty = TRUE;
 778 }
 779
 780 void wxTreeCtrl::DeleteAllItems()
 781 {
 782   if ( m_anchor )
 783   {
 784     m_anchor->DeleteChildren(this);
 785     delete m_anchor;
 786
 787     m_anchor = NULL;
 788
 789     m_dirty = TRUE;
 790   }
 791 }
 792
 793 void wxTreeCtrl::Expand(const wxTreeItemId& itemId)
 794 {
 795   wxGenericTreeItem *item = itemId.m_pItem;
 796
 797   if ( !item->HasPlus() )
 798     return;
 799
 800   if ( item->IsExpanded() )
 801     return;
 802
 803   wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_EXPANDING, GetId() );
 804   event.m_item = item;
 805   event.SetEventObject( this );
 806   if ( ProcessEvent( event ) && event.m_code )
 807   {
 808     // cancelled by program
 809     return;
 810   }
 811
 812   item->Expand();
 813   CalculatePositions();
 814
 815   RefreshSubtree(item);
 816
 817   event.SetEventType(wxEVT_COMMAND_TREE_ITEM_EXPANDED);
 818   ProcessEvent( event );
 819 }
 820
 821 void wxTreeCtrl::Collapse(const wxTreeItemId& itemId)
 822 {
 823   wxGenericTreeItem *item = itemId.m_pItem;
 824
 825   if ( !item->IsExpanded() )
 826     return;
 827
 828   wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_COLLAPSING, GetId() );
 829   event.m_item = item;
 830   event.SetEventObject( this );
 831   if ( ProcessEvent( event ) && event.m_code )
 832   {
 833     // cancelled by program
 834     return;
 835   }
 836
 837   item->Collapse();
 838
 839   wxArrayTreeItems& children = item->GetChildren();
 840   size_t count = children.Count();
 841   for ( size_t n = 0; n < count; n++ )
 842   {
 843     Collapse(children[n]);
 844   }
 845
 846   CalculatePositions();
 847
 848   RefreshSubtree(item);
 849
 850   event.SetEventType(wxEVT_COMMAND_TREE_ITEM_COLLAPSED);
 851   ProcessEvent( event );
 852 }
 853
 854 void wxTreeCtrl::CollapseAndReset(const wxTreeItemId& item)
 855 {
 856   Collapse(item);
 857   DeleteChildren(item);
 858 }
 859
 860 void wxTreeCtrl::Toggle(const wxTreeItemId& itemId)
 861 {
 862   wxGenericTreeItem *item = itemId.m_pItem;
 863
 864   if ( item->IsExpanded() )
 865     Collapse(itemId);
 866   else
 867     Expand(itemId);
 868 }
 869
 870 void wxTreeCtrl::Unselect()
 871 {
 872   if ( m_current )
 873   {
 874     m_current->SetHilight( FALSE );
 875     RefreshLine( m_current );
 876   }
 877 }
 878
 879 void wxTreeCtrl::SelectItem(const wxTreeItemId& itemId)
 880 {
 881   wxGenericTreeItem *item = itemId.m_pItem;
 882
 883   if ( m_current != item )
 884   {
 885     wxTreeEvent event( wxEVT_COMMAND_TREE_SEL_CHANGING, GetId() );
 886     event.m_item = item;
 887     event.m_itemOld = m_current;
 888     event.SetEventObject( this );
 889     if ( GetEventHandler()->ProcessEvent( event ) && event.WasVetoed() )
 890       return;
 891
 892     if ( m_current )
 893     {
 894       m_current->SetHilight( FALSE );
 895       RefreshLine( m_current );
 896     }
 897
 898     m_current = item;
 899     m_current->SetHilight( TRUE );
 900     RefreshLine( m_current );
 901
 902     event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGED);
 903     GetEventHandler()->ProcessEvent( event );
 904   }
 905 }
 906
 907 void wxTreeCtrl::EnsureVisible(const wxTreeItemId& item)
 908 {
 909     wxGenericTreeItem *gitem = item.m_pItem;
 910
 911     int item_y = gitem->GetY();
 912
 913     int start_x = 0;
 914     int start_y = 0;
 915     ViewStart( &start_x, &start_y );
 916     start_y *= 10;
 917
 918     int client_h = 0;
 919     int client_w = 0;
 920     GetClientSize( &client_w, &client_h );
 921
 922     if (item_y < start_y+3)
 923     {
 924         int x = 0;
 925         int y = 0;
 926         m_anchor->GetSize( x, y );
 927         y += 2*m_lineHeight;
 928         int x_pos = GetScrollPos( wxHORIZONTAL );
 929     SetScrollbars( 10, 10, x/10, y/10, x_pos, (item_y-client_h/2)/10 );
 930         return;
 931     }
 932
 933     if (item_y > start_y+client_h-16)
 934     {
 935        int x = 0;
 936        int y = 0;
 937        m_anchor->GetSize( x, y );
 938        y += 2*m_lineHeight;
 939        int x_pos = GetScrollPos( wxHORIZONTAL );
 940        SetScrollbars( 10, 10, x/10, y/10, x_pos, (item_y-client_h/2)/10 );
 941        return;
 942     }
 943 }
 944
 945 void wxTreeCtrl::ScrollTo(const wxTreeItemId& WXUNUSED(item))
 946 {
 947     wxFAIL_MSG("not implemented");
 948 }
 949
 950 wxTextCtrl *wxTreeCtrl::EditLabel( const wxTreeItemId& WXUNUSED(item),
 951                                    wxClassInfo* WXUNUSED(textCtrlClass) )
 952 {
 953     wxFAIL_MSG("not implemented");
 954
 955     return (wxTextCtrl*)NULL;
 956 }
 957
 958 wxTextCtrl *wxTreeCtrl::GetEditControl() const
 959 {
 960     wxFAIL_MSG("not implemented");
 961
 962     return (wxTextCtrl*)NULL;
 963 }
 964
 965 void wxTreeCtrl::EndEditLabel(const wxTreeItemId& WXUNUSED(item), bool WXUNUSED(discardChanges))
 966 {
 967     wxFAIL_MSG("not implemented");
 968 }
 969
 970 // FIXME: tree sorting functions are not reentrant and not MT-safe!
 971 static wxTreeCtrl *s_treeBeingSorted = NULL;
 972
 973 static int tree_ctrl_compare_func(wxGenericTreeItem **item1,
 974                                   wxGenericTreeItem **item2)
 975 {
 976     wxCHECK_MSG( s_treeBeingSorted, 0, "bug in wxTreeCtrl::SortChildren()" );
 977
 978     return s_treeBeingSorted->OnCompareItems(*item1, *item2);
 979 }
 980
 981 int wxTreeCtrl::OnCompareItems(const wxTreeItemId& item1,
 982                                const wxTreeItemId& item2)
 983 {
 984     return strcmp(GetItemText(item1), GetItemText(item2));
 985 }
 986
 987 void wxTreeCtrl::SortChildren(const wxTreeItemId& itemId)
 988 {
 989     wxCHECK_RET( itemId.IsOk(), "invalid tree item" );
 990
 991     wxGenericTreeItem *item = itemId.m_pItem;
 992
 993     wxCHECK_RET( !s_treeBeingSorted,
 994                  "wxTreeCtrl::SortChildren is not reentrant" );
 995
 996     wxArrayTreeItems& children = item->GetChildren();
 997     if ( children.Count() > 1 )
 998     {
 999         s_treeBeingSorted = this;
1000         children.Sort(tree_ctrl_compare_func);
1001         s_treeBeingSorted = NULL;
1002
1003         m_dirty = TRUE;
1004     }
1005     //else: don't make the tree dirty as nothing changed
1006 }
1007
1008 wxImageList *wxTreeCtrl::GetImageList() const
1009 {
1010     return m_imageListNormal;
1011 }
1012
1013 wxImageList *wxTreeCtrl::GetStateImageList() const
1014 {
1015     return m_imageListState;
1016 }
1017
1018 void wxTreeCtrl::SetImageList(wxImageList *imageList)
1019 {
1020     m_imageListNormal = imageList;
1021 }
1022
1023 void wxTreeCtrl::SetStateImageList(wxImageList *imageList)
1024 {
1025     m_imageListState = imageList;
1026 }
1027
1028 // -----------------------------------------------------------------------------
1029 // helpers
1030 // -----------------------------------------------------------------------------
1031
1032 void wxTreeCtrl::AdjustMyScrollbars()
1033 {
1034     if (m_anchor)
1035     {
1036         int x = 0;
1037         int y = 0;
1038         m_anchor->GetSize( x, y );
1039         y += 2*m_lineHeight;
1040         int x_pos = GetScrollPos( wxHORIZONTAL );
1041         int y_pos = GetScrollPos( wxVERTICAL );
1042         SetScrollbars( 10, 10, x/10, y/10, x_pos, y_pos );
1043     }
1044     else
1045     {
1046         SetScrollbars( 0, 0, 0, 0 );
1047     }
1048 }
1049
1050 void wxTreeCtrl::PaintItem(wxGenericTreeItem *item, wxDC& dc)
1051 {
1052     /* render bold items in bold */
1053     wxFont fontOld;
1054     wxFont fontNew;
1055
1056     if (item->IsBold())
1057     {
1058         fontOld = dc.GetFont();
1059         if (fontOld.Ok())
1060         {
1061           /* @@ is there any better way to make a bold variant of old font? */
1062           fontNew = wxFont( fontOld.GetPointSize(),
1063                             fontOld.GetFamily(),
1064                             fontOld.GetStyle(),
1065                             wxBOLD,
1066                             fontOld.GetUnderlined());
1067           dc.SetFont(fontNew);
1068         }
1069         else
1070         {
1071             wxFAIL_MSG("wxDC::GetFont() failed!");
1072         }
1073     }
1074
1075     long text_w = 0;
1076     long text_h = 0;
1077     dc.GetTextExtent( item->GetText(), &text_w, &text_h );
1078
1079     int image_h = 0;
1080     int image_w = 0;
1081     if ((item->IsExpanded()) && (item->GetSelectedImage() != -1))
1082     {
1083         m_imageListNormal->GetSize( item->GetSelectedImage(), image_w, image_h );
1084         image_w += 4;
1085     }
1086     else if (item->GetImage() != -1)
1087     {
1088         m_imageListNormal->GetSize( item->GetImage(), image_w, image_h );
1089         image_w += 4;
1090     }
1091
1092     dc.DrawRectangle( item->GetX()-2, item->GetY()-2, image_w+text_w+4, text_h+4 );
1093
1094     if ((item->IsExpanded()) && (item->GetSelectedImage() != -1))
1095     {
1096         dc.SetClippingRegion( item->GetX(), item->GetY(), image_w-2, text_h );
1097         m_imageListNormal->Draw( item->GetSelectedImage(), dc,
1098                                  item->GetX(), item->GetY()-1,
1099                                  wxIMAGELIST_DRAW_TRANSPARENT );
1100         dc.DestroyClippingRegion();
1101     }
1102     else if (item->GetImage() != -1)
1103     {
1104         dc.SetClippingRegion( item->GetX(), item->GetY(), image_w-2, text_h );
1105         m_imageListNormal->Draw( item->GetImage(), dc,
1106                                  item->GetX(), item->GetY()-1,
1107                                  wxIMAGELIST_DRAW_TRANSPARENT );
1108         dc.DestroyClippingRegion();
1109     }
1110
1111     dc.SetBackgroundMode(wxTRANSPARENT);
1112     dc.DrawText( item->GetText(), image_w + item->GetX(), item->GetY() );
1113
1114     /* restore normal font for bold items */
1115     if (fontOld.Ok())
1116     {
1117         dc.SetFont( fontOld);
1118     }
1119 }
1120
1121 void wxTreeCtrl::PaintLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y )
1122 {
1123     int horizX = level*m_indent;
1124
1125     item->SetX( horizX+33 );
1126     item->SetY( y-m_lineHeight/3 );
1127     item->SetHeight( m_lineHeight );
1128
1129     item->SetCross( horizX+15, y );
1130
1131     int oldY = y;
1132
1133     int exposed_x = dc.LogicalToDeviceX( 0 );
1134     int exposed_y = dc.LogicalToDeviceY( item->GetY()-2 );
1135
1136     if (IsExposed( exposed_x, exposed_y, 10000, m_lineHeight+4 ))  // 10000 = very much
1137     {
1138         int startX = horizX;
1139         int endX = horizX + 10;
1140
1141         if (!item->HasChildren()) endX += 20;
1142
1143         dc.DrawLine( startX, y, endX, y );
1144
1145         if (item->HasPlus())
1146         {
1147             dc.DrawLine( horizX+20, y, horizX+30, y );
1148             dc.SetPen( *wxGREY_PEN );
1149             dc.SetBrush( *wxWHITE_BRUSH );
1150             dc.DrawRectangle( horizX+10, y-4, 11, 9 );
1151             dc.SetPen( *wxBLACK_PEN );
1152             dc.DrawLine( horizX+13, y, horizX+18, y );
1153
1154             if (!item->IsExpanded())
1155         {
1156                 dc.DrawLine( horizX+15, y-2, horizX+15, y+3 );
1157         }
1158         }
1159
1160         if (item->HasHilight())
1161         {
1162             dc.SetTextForeground( wxSystemSettings::GetSystemColour( wxSYS_COLOUR_HIGHLIGHTTEXT ) );
1163
1164             dc.SetBrush( *m_hilightBrush );
1165
1166             if (m_hasFocus)
1167                 dc.SetPen( *wxBLACK_PEN );
1168             else
1169                 dc.SetPen( *wxTRANSPARENT_PEN );
1170
1171             PaintItem(item, dc);
1172
1173             dc.SetPen( *wxBLACK_PEN );
1174             dc.SetTextForeground( *wxBLACK );
1175             dc.SetBrush( *wxWHITE_BRUSH );
1176         }
1177         else
1178         {
1179             dc.SetBrush( *wxWHITE_BRUSH );
1180             dc.SetPen( *wxTRANSPARENT_PEN );
1181
1182             PaintItem(item, dc);
1183
1184             dc.SetPen( *wxBLACK_PEN );
1185         }
1186     }
1187
1188     if (item->IsExpanded())
1189     {
1190         int semiOldY = y;
1191
1192         wxArrayTreeItems& children = item->GetChildren();
1193         size_t count = children.Count();
1194         for ( size_t n = 0; n < count; n++ )
1195         {
1196             y += m_lineHeight;
1197             semiOldY = y;
1198             PaintLevel( children[n], dc, level+1, y );
1199         }
1200
1201         /* it may happen that the item is expanded but has no items (when you
1202          * delete all its children for example) - don't draw the vertical line
1203          * in this case */
1204         if (count > 0) dc.DrawLine( horizX+15, oldY+5, horizX+15, semiOldY );
1205     }
1206 }
1207
1208 // -----------------------------------------------------------------------------
1209 // wxWindows callbacks
1210 // -----------------------------------------------------------------------------
1211
1212 void wxTreeCtrl::OnPaint( wxPaintEvent &WXUNUSED(event) )
1213 {
1214     if ( !m_anchor )
1215         return;
1216
1217     wxPaintDC dc(this);
1218     PrepareDC( dc );
1219
1220     dc.SetFont( wxSystemSettings::GetSystemFont( wxSYS_DEFAULT_GUI_FONT ) );
1221
1222     dc.SetPen( m_dottedPen );
1223     m_lineHeight = (int)(dc.GetCharHeight() + 4);
1224
1225     int y = m_lineHeight / 2 + 2;
1226     PaintLevel( m_anchor, dc, 0, y );
1227 }
1228
1229 void wxTreeCtrl::OnSetFocus( wxFocusEvent &WXUNUSED(event) )
1230 {
1231     m_hasFocus = TRUE;
1232
1233     if (m_current) RefreshLine( m_current );
1234 }
1235
1236 void wxTreeCtrl::OnKillFocus( wxFocusEvent &WXUNUSED(event) )
1237 {
1238     m_hasFocus = FALSE;
1239
1240     if (m_current) RefreshLine( m_current );
1241 }
1242
1243 void wxTreeCtrl::OnChar( wxKeyEvent &event )
1244 {
1245     wxTreeEvent te( wxEVT_COMMAND_TREE_KEY_DOWN, GetId() );
1246     te.m_code = event.KeyCode();
1247     te.SetEventObject( this );
1248     GetEventHandler()->ProcessEvent( te );
1249
1250     if (m_current == 0)
1251     {
1252         event.Skip();
1253         return;
1254     }
1255
1256     switch (event.KeyCode())
1257     {
1258         case '+':
1259         case WXK_ADD:
1260             if (m_current->HasPlus() && !IsExpanded(m_current))
1261             {
1262                 Expand(m_current);
1263             }
1264             break;
1265
1266         case '-':
1267         case WXK_SUBTRACT:
1268             if (IsExpanded(m_current))
1269             {
1270                 Collapse(m_current);
1271             }
1272             break;
1273
1274         case '*':
1275         case WXK_MULTIPLY:
1276             Toggle(m_current);
1277             break;
1278
1279         case ' ':
1280         case WXK_RETURN:
1281             {
1282                 wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_ACTIVATED, GetId() );
1283                 event.m_item = m_current;
1284                 event.m_code = 0;
1285                 event.SetEventObject( this );
1286                 GetEventHandler()->ProcessEvent( event );
1287             }
1288             break;
1289
1290             // up goes to the previous sibling or to the last of its children if
1291             // it's expanded
1292         case WXK_UP:
1293             {
1294                 wxTreeItemId prev = GetPrevSibling( m_current );
1295                 if (!prev)
1296                 {
1297                     prev = GetParent( m_current );
1298                     long cockie = 0;
1299                     wxTreeItemId current = m_current;
1300                     if (current == GetFirstChild( prev, cockie ))
1301                     {
1302                         // otherwise we return to where we came from
1303                         SelectItem( prev );
1304                         EnsureVisible( prev );
1305                         break;
1306                     }
1307                 }
1308                 if (prev)
1309                 {
1310                     while ( IsExpanded(prev) && HasChildren(prev) )
1311                     {
1312                         wxTreeItemId child = GetLastChild(prev);
1313                         if ( child )
1314                         {
1315                             prev = child;
1316                         }
1317                     }
1318
1319                     SelectItem( prev );
1320                     EnsureVisible( prev );
1321                 }
1322             }
1323             break;
1324
1325             // left arrow goes to the parent
1326         case WXK_LEFT:
1327             {
1328                 wxTreeItemId prev = GetParent( m_current );
1329                 if (prev)
1330                 {
1331                     EnsureVisible( prev );
1332                     SelectItem( prev );
1333                 }
1334             }
1335             break;
1336
1337         case WXK_RIGHT:
1338             // this works the same as the down arrow except that we also expand the
1339             // item if it wasn't expanded yet
1340             Expand(m_current);
1341             // fall through
1342
1343         case WXK_DOWN:
1344             {
1345                 if (IsExpanded(m_current) && HasChildren(m_current))
1346                 {
1347                     long cookie = 0;
1348                     wxTreeItemId child = GetFirstChild( m_current, cookie );
1349                     SelectItem( child );
1350                     EnsureVisible( child );
1351                 }
1352                 else
1353                 {
1354                     wxTreeItemId next = GetNextSibling( m_current );
1355                     if (next == 0)
1356                     {
1357                         wxTreeItemId current = m_current;
1358                         while (current && !next)
1359                         {
1360                             current = GetParent( current );
1361                             if (current) next = GetNextSibling( current );
1362                         }
1363                     }
1364                     if (next != 0)
1365                     {
1366                         SelectItem( next );
1367                         EnsureVisible( next );
1368                     }
1369                 }
1370             }
1371             break;
1372
1373             // <End> selects the last visible tree item
1374         case WXK_END:
1375             {
1376                 wxTreeItemId last = GetRootItem();
1377
1378                 while ( last.IsOk() && IsExpanded(last) )
1379                 {
1380                     wxTreeItemId lastChild = GetLastChild(last);
1381
1382                     // it may happen if the item was expanded but then all of
1383                     // its children have been deleted - so IsExpanded() returned
1384                     // TRUE, but GetLastChild() returned invalid item
1385                     if ( !lastChild )
1386                         break;
1387
1388                     last = lastChild;
1389                 }
1390
1391                 if ( last.IsOk() )
1392                 {
1393                     EnsureVisible( last );
1394                     SelectItem( last );
1395                 }
1396             }
1397             break;
1398
1399             // <Home> selects the root item
1400         case WXK_HOME:
1401             {
1402                 wxTreeItemId prev = GetRootItem();
1403                 if (prev)
1404                 {
1405                     EnsureVisible( prev );
1406                     SelectItem( prev );
1407                 }
1408             }
1409             break;
1410
1411         default:
1412             event.Skip();
1413     }
1414 }
1415
1416 wxTreeItemId wxTreeCtrl::HitTest(const wxPoint& point, int& WXUNUSED(flags))
1417 {
1418     bool onButton = FALSE;
1419     return m_anchor->HitTest( point, onButton );
1420 }
1421
1422 void wxTreeCtrl::OnMouse( wxMouseEvent &event )
1423 {
1424     if (!event.LeftIsDown()) m_dragCount = 0;
1425
1426     if ( !(event.LeftDown() || event.LeftDClick() || event.Dragging()) ) return;
1427
1428     if ( !m_anchor ) return;
1429
1430     wxClientDC dc(this);
1431     PrepareDC(dc);
1432     long x = dc.DeviceToLogicalX( (long)event.GetX() );
1433     long y = dc.DeviceToLogicalY( (long)event.GetY() );
1434
1435     bool onButton = FALSE;
1436     wxGenericTreeItem *item = m_anchor->HitTest( wxPoint(x,y), onButton );
1437
1438     if (item == NULL) return;  /* we hit the blank area */
1439
1440     if (event.Dragging())
1441     {
1442         if (m_dragCount == 2)  /* small drag latency (3?) */
1443         {
1444             m_dragCount = 0;
1445
1446             wxTreeEvent nevent(wxEVT_COMMAND_TREE_BEGIN_DRAG, GetId());
1447             nevent.m_item = m_current;
1448             nevent.SetEventObject(this);
1449             GetEventHandler()->ProcessEvent(nevent);
1450         }
1451         else
1452         {
1453             m_dragCount++;
1454         }
1455         return;
1456     }
1457
1458     if (!IsSelected(item)) SelectItem(item);  /* we dont support multiple selections, BTW */
1459
1460     if (event.LeftDClick())
1461     {
1462         wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_ACTIVATED, GetId() );
1463         event.m_item = item;
1464         event.m_code = 0;
1465         event.SetEventObject( this );
1466         GetEventHandler()->ProcessEvent( event );
1467     }
1468
1469     if (onButton)
1470     {
1471         Toggle( item );
1472     }
1473 }
1474
1475 void wxTreeCtrl::OnIdle( wxIdleEvent &WXUNUSED(event) )
1476 {
1477     /* after all changes have been done to the tree control,
1478      * we actually redraw the tree when everything is over */
1479
1480     if (!m_dirty) return;
1481
1482     m_dirty = FALSE;
1483
1484     CalculatePositions();
1485
1486     AdjustMyScrollbars();
1487 }
1488
1489 // -----------------------------------------------------------------------------
1490
1491 void wxTreeCtrl::CalculateLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y )
1492 {
1493     int horizX = level*m_indent;
1494
1495     item->SetX( horizX+33 );
1496     item->SetY( y-m_lineHeight/3-2 );
1497     item->SetHeight( m_lineHeight );
1498
1499     if ( !item->IsExpanded() )
1500     {
1501         /* we dont need to calculate collapsed branches */
1502         return;
1503     }
1504
1505     wxArrayTreeItems& children = item->GetChildren();
1506     size_t count = children.Count();
1507     for ( size_t n = 0; n < count; n++ )
1508     {
1509         y += m_lineHeight;
1510         CalculateLevel( children[n], dc, level+1, y );  /* recurse */
1511     }
1512 }
1513
1514 void wxTreeCtrl::CalculatePositions()
1515 {
1516     if ( !m_anchor ) return;
1517
1518     wxClientDC dc(this);
1519     PrepareDC( dc );
1520
1521     dc.SetFont( wxSystemSettings::GetSystemFont( wxSYS_DEFAULT_GUI_FONT ) );
1522
1523     dc.SetPen( m_dottedPen );
1524     m_lineHeight = (int)(dc.GetCharHeight() + 4);
1525
1526     int y = m_lineHeight / 2 + 2;
1527     CalculateLevel( m_anchor, dc, 0, y ); /* start recursion */
1528 }
1529
1530 void wxTreeCtrl::RefreshSubtree(wxGenericTreeItem *item)
1531 {
1532     wxClientDC dc(this);
1533     PrepareDC(dc);
1534
1535     int cw = 0;
1536     int ch = 0;
1537     GetClientSize( &cw, &ch );
1538
1539     wxRect rect;
1540     rect.x = dc.LogicalToDeviceX( 0 );
1541     rect.width = cw;
1542     rect.y = dc.LogicalToDeviceY( item->GetY() );
1543     rect.height = ch;
1544
1545     Refresh( TRUE, &rect );
1546
1547     AdjustMyScrollbars();
1548 }
1549
1550 void wxTreeCtrl::RefreshLine( wxGenericTreeItem *item )
1551 {
1552     wxClientDC dc(this);
1553     PrepareDC( dc );
1554
1555     wxRect rect;
1556     rect.x = dc.LogicalToDeviceX( item->GetX() - 2 );
1557     rect.y = dc.LogicalToDeviceY( item->GetY() - 2 );
1558     rect.width = 1000;
1559     rect.height = dc.GetCharHeight() + 6;
1560
1561     Refresh( TRUE, &rect );
1562 }
1563