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