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/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/arrimpl.cpp"
  38 #include "wx/dcclient.h"
  39 #include "wx/msgdlg.h"
  40
  41 // -----------------------------------------------------------------------------
  42 // array types
  43 // -----------------------------------------------------------------------------
  44
  45 class WXDLLEXPORT wxGenericTreeItem;
  46
  47 WX_DEFINE_ARRAY(wxGenericTreeItem *, wxArrayGenericTreeItems);
  48 WX_DEFINE_OBJARRAY(wxArrayTreeItemIds);
  49
  50 // ----------------------------------------------------------------------------
  51 // constants
  52 // ----------------------------------------------------------------------------
  53
  54 static const int NO_IMAGE = -1;
  55
  56 // -----------------------------------------------------------------------------
  57 // private classes
  58 // -----------------------------------------------------------------------------
  59
  60 // a tree item
  61 class WXDLLEXPORT wxGenericTreeItem
  62 {
  63 public:
  64     // ctors & dtor
  65     wxGenericTreeItem() { m_data = NULL; }
  66     wxGenericTreeItem( wxGenericTreeItem *parent,
  67             const wxString& text,
  68             wxDC& dc,
  69             int image, int selImage,
  70             wxTreeItemData *data );
  71
  72     ~wxGenericTreeItem();
  73
  74     // trivial accessors
  75     wxArrayGenericTreeItems& GetChildren() { return m_children; }
  76
  77     const wxString& GetText() const { return m_text; }
  78     int GetImage(wxTreeItemIcon which = wxTreeItemIcon_Normal) const
  79     { return m_images[which]; }
  80     wxTreeItemData *GetData() const { return m_data; }
  81
  82     // returns the current image for the item (depending on its
  83     // selected/expanded/whatever state)
  84     int GetCurrentImage() const;
  85
  86     void SetText( const wxString &text );
  87     void SetImage(int image, wxTreeItemIcon which) { m_images[which] = image; }
  88     void SetData(wxTreeItemData *data) { m_data = data; }
  89
  90     void SetHasPlus(bool has = TRUE) { m_hasPlus = has; }
  91
  92     void SetBold(bool bold) { m_isBold = bold; }
  93
  94     int GetX() const { return m_x; }
  95     int GetY() const { return m_y; }
  96
  97     void SetX(int x) { m_x = x; }
  98     void SetY(int y) { m_y = y; }
  99
 100     int  GetHeight() const { return m_height; }
 101     int  GetWidth()  const { return m_width; }
 102
 103     void SetHeight(int h) { m_height = h; }
 104     void SetWidth(int w) { m_width = w; }
 105
 106
 107     wxGenericTreeItem *GetParent() const { return m_parent; }
 108
 109     // operations
 110         // deletes all children notifying the treectrl about it if !NULL
 111         // pointer given
 112     void DeleteChildren(wxTreeCtrl *tree = NULL);
 113         // FIXME don't know what is it for
 114     void Reset();
 115
 116     // get count of all children (and grand children if 'recursively')
 117     size_t GetChildrenCount(bool recursively = TRUE) const;
 118
 119     void Insert(wxGenericTreeItem *child, size_t index)
 120     { m_children.Insert(child, index); }
 121
 122     void SetCross( int x, int y );
 123     void GetSize( int &x, int &y, const wxTreeCtrl* );
 124
 125         // return the item at given position (or NULL if no item), onButton is
 126         // TRUE if the point belongs to the item's button, otherwise it lies
 127         // on the button's label
 128     wxGenericTreeItem *HitTest( const wxPoint& point, const wxTreeCtrl *, int &flags);
 129
 130     void Expand() { m_isCollapsed = FALSE; }
 131     void Collapse() { m_isCollapsed = TRUE; }
 132
 133     void SetHilight( bool set = TRUE ) { m_hasHilight = set; }
 134
 135     // status inquiries
 136     bool HasChildren() const { return !m_children.IsEmpty(); }
 137     bool IsSelected()  const { return m_hasHilight; }
 138     bool IsExpanded()  const { return !m_isCollapsed; }
 139     bool HasPlus()     const { return m_hasPlus || HasChildren(); }
 140     bool IsBold()      const { return m_isBold; }
 141
 142     // attributes
 143         // get them - may be NULL
 144     wxTreeItemAttr *GetAttributes() const { return m_attr; }
 145         // get them ensuring that the pointer is not NULL
 146     wxTreeItemAttr& Attr()
 147     {
 148         if ( !m_attr )
 149             m_attr = new wxTreeItemAttr;
 150
 151         return *m_attr;
 152     }
 153
 154 private:
 155     wxString            m_text;
 156
 157     // tree ctrl images for the normal, selected, expanded and
 158     // expanded+selected states
 159     int                 m_images[wxTreeItemIcon_Max];
 160
 161     wxTreeItemData     *m_data;
 162
 163     // use bitfields to save size
 164     int                 m_isCollapsed :1;
 165     int                 m_hasHilight  :1; // same as focused
 166     int                 m_hasPlus     :1; // used for item which doesn't have
 167                                           // children but has a [+] button
 168     int                 m_isBold      :1; // render the label in bold font
 169
 170     int                 m_x, m_y;
 171     long                m_height, m_width;
 172     int                 m_xCross, m_yCross;
 173     int                 m_level;
 174
 175     wxArrayGenericTreeItems m_children;
 176     wxGenericTreeItem  *m_parent;
 177
 178     wxTreeItemAttr     *m_attr;
 179 };
 180
 181 // =============================================================================
 182 // implementation
 183 // =============================================================================
 184
 185
 186 // -----------------------------------------------------------------------------
 187 // wxTreeRenameTimer (internal)
 188 // -----------------------------------------------------------------------------
 189
 190 wxTreeRenameTimer::wxTreeRenameTimer( wxTreeCtrl *owner )
 191 {
 192     m_owner = owner;
 193 }
 194
 195 void wxTreeRenameTimer::Notify()
 196 {
 197     m_owner->OnRenameTimer();
 198 }
 199
 200 //-----------------------------------------------------------------------------
 201 // wxTreeTextCtrl (internal)
 202 //-----------------------------------------------------------------------------
 203
 204 IMPLEMENT_DYNAMIC_CLASS(wxTreeTextCtrl,wxTextCtrl);
 205
 206 BEGIN_EVENT_TABLE(wxTreeTextCtrl,wxTextCtrl)
 207     EVT_CHAR           (wxTreeTextCtrl::OnChar)
 208     EVT_KILL_FOCUS     (wxTreeTextCtrl::OnKillFocus)
 209 END_EVENT_TABLE()
 210
 211 wxTreeTextCtrl::wxTreeTextCtrl( wxWindow *parent, const wxWindowID id,
 212     bool *accept, wxString *res, wxTreeCtrl *owner,
 213     const wxString &value, const wxPoint &pos, const wxSize &size,
 214 #if wxUSE_VALIDATORS
 215     int style, const wxValidator& validator, const wxString &name ) :
 216 #endif
 217   wxTextCtrl( parent, id, value, pos, size, style, validator, name )
 218 {
 219     m_res = res;
 220     m_accept = accept;
 221     m_owner = owner;
 222     (*m_accept) = FALSE;
 223     (*m_res) = "";
 224     m_startValue = value;
 225 }
 226
 227 void wxTreeTextCtrl::OnChar( wxKeyEvent &event )
 228 {
 229     if (event.m_keyCode == WXK_RETURN)
 230     {
 231         (*m_accept) = TRUE;
 232         (*m_res) = GetValue();
 233         m_owner->SetFocus();
 234         return;
 235     }
 236     if (event.m_keyCode == WXK_ESCAPE)
 237     {
 238         (*m_accept) = FALSE;
 239         (*m_res) = "";
 240         m_owner->SetFocus();
 241         return;
 242     }
 243     event.Skip();
 244 }
 245
 246 void wxTreeTextCtrl::OnKillFocus( wxFocusEvent &WXUNUSED(event) )
 247 {
 248     if (wxPendingDelete.Member(this)) return;
 249
 250     wxPendingDelete.Append(this);
 251
 252     if ((*m_accept) && ((*m_res) != m_startValue))
 253         m_owner->OnRenameAccept();
 254 }
 255
 256 #define PIXELS_PER_UNIT 10
 257 // -----------------------------------------------------------------------------
 258 // wxTreeEvent
 259 // -----------------------------------------------------------------------------
 260
 261 IMPLEMENT_DYNAMIC_CLASS(wxTreeEvent, wxNotifyEvent)
 262
 263 wxTreeEvent::wxTreeEvent( wxEventType commandType, int id )
 264            : wxNotifyEvent( commandType, id )
 265 {
 266     m_code = 0;
 267     m_itemOld = (wxGenericTreeItem *)NULL;
 268 }
 269
 270 // -----------------------------------------------------------------------------
 271 // wxGenericTreeItem
 272 // -----------------------------------------------------------------------------
 273
 274 wxGenericTreeItem::wxGenericTreeItem(wxGenericTreeItem *parent,
 275                                      const wxString& text,
 276                                      wxDC& WXUNUSED(dc),
 277                                      int image, int selImage,
 278                                      wxTreeItemData *data)
 279                  : m_text(text)
 280 {
 281     m_images[wxTreeItemIcon_Normal] = image;
 282     m_images[wxTreeItemIcon_Selected] = selImage;
 283     m_images[wxTreeItemIcon_Expanded] = NO_IMAGE;
 284     m_images[wxTreeItemIcon_SelectedExpanded] = NO_IMAGE;
 285
 286     m_data = data;
 287     m_x = m_y = 0;
 288     m_xCross = m_yCross = 0;
 289
 290     m_level = 0;
 291
 292     m_isCollapsed = TRUE;
 293     m_hasHilight = FALSE;
 294     m_hasPlus = FALSE;
 295     m_isBold = FALSE;
 296
 297     m_parent = parent;
 298
 299     m_attr = (wxTreeItemAttr *)NULL;
 300
 301     // We don't know the height here yet.
 302     m_width = 0;
 303     m_height = 0;
 304 }
 305
 306 wxGenericTreeItem::~wxGenericTreeItem()
 307 {
 308     delete m_data;
 309
 310     delete m_attr;
 311
 312     wxASSERT_MSG( m_children.IsEmpty(),
 313                   wxT("please call DeleteChildren() before deleting the item") );
 314 }
 315
 316 void wxGenericTreeItem::DeleteChildren(wxTreeCtrl *tree)
 317 {
 318     size_t count = m_children.Count();
 319     for ( size_t n = 0; n < count; n++ )
 320     {
 321         wxGenericTreeItem *child = m_children[n];
 322         if (tree)
 323             tree->SendDeleteEvent(child);
 324
 325         child->DeleteChildren(tree);
 326         delete child;
 327     }
 328
 329     m_children.Empty();
 330 }
 331
 332 void wxGenericTreeItem::SetText( const wxString &text )
 333 {
 334     m_text = text;
 335 }
 336
 337 void wxGenericTreeItem::Reset()
 338 {
 339     m_text.Empty();
 340     for ( int i = 0; i < wxTreeItemIcon_Max; i++ )
 341     {
 342         m_images[i] = NO_IMAGE;
 343     }
 344
 345     m_data = NULL;
 346     m_x = m_y =
 347     m_height = m_width = 0;
 348     m_xCross =
 349     m_yCross = 0;
 350
 351     m_level = 0;
 352
 353     DeleteChildren();
 354     m_isCollapsed = TRUE;
 355
 356     m_parent = (wxGenericTreeItem *)NULL;
 357 }
 358
 359 size_t wxGenericTreeItem::GetChildrenCount(bool recursively) const
 360 {
 361     size_t count = m_children.Count();
 362     if ( !recursively )
 363         return count;
 364
 365     size_t total = count;
 366     for (size_t n = 0; n < count; ++n)
 367     {
 368         total += m_children[n]->GetChildrenCount();
 369     }
 370
 371     return total;
 372 }
 373
 374 void wxGenericTreeItem::SetCross( int x, int y )
 375 {
 376     m_xCross = x;
 377     m_yCross = y;
 378 }
 379
 380 void wxGenericTreeItem::GetSize( int &x, int &y, const wxTreeCtrl *theTree )
 381 {
 382     int bottomY=m_y+theTree->GetLineHeight(this);
 383     if ( y < bottomY ) y = bottomY;
 384     int width = m_x +  m_width;
 385     if ( x < width ) x = width;
 386
 387     if (IsExpanded())
 388     {
 389         size_t count = m_children.Count();
 390         for ( size_t n = 0; n < count; ++n )
 391         {
 392             m_children[n]->GetSize( x, y, theTree );
 393         }
 394     }
 395 }
 396
 397 wxGenericTreeItem *wxGenericTreeItem::HitTest( const wxPoint& point,
 398                                                const wxTreeCtrl *theTree,
 399                                                int &flags)
 400 {
 401     if ((point.y > m_y) && (point.y < m_y + theTree->GetLineHeight(this)))
 402     {
 403         if (point.y<m_y+theTree->GetLineHeight(this)/2)
 404             flags |= wxTREE_HITTEST_ONITEMUPPERPART;
 405         else
 406             flags |= wxTREE_HITTEST_ONITEMLOWERPART;
 407
 408         // 5 is the size of the plus sign
 409         if ((point.x > m_xCross-5) && (point.x < m_xCross+5) &&
 410             (point.y > m_yCross-5) && (point.y < m_yCross+5) &&
 411             (IsExpanded() || HasPlus()))
 412         {
 413             flags|=wxTREE_HITTEST_ONITEMBUTTON;
 414             return this;
 415         }
 416
 417         if ((point.x >= m_x) && (point.x <= m_x+m_width))
 418         {
 419             int image_w = -1;
 420             int image_h;
 421
 422             // assuming every image (normal and selected ) has the same size !
 423             if ( (GetImage() != NO_IMAGE) && theTree->m_imageListNormal )
 424                 theTree->m_imageListNormal->GetSize(GetImage(), image_w, image_h);
 425
 426             if ((image_w != -1) && (point.x <= m_x + image_w + 1))
 427                 flags |= wxTREE_HITTEST_ONITEMICON;
 428             else
 429                 flags |= wxTREE_HITTEST_ONITEMLABEL;
 430
 431             return this;
 432         }
 433
 434         if (point.x < m_x)
 435             flags |= wxTREE_HITTEST_ONITEMINDENT;
 436         if (point.x > m_x+m_width)
 437             flags |= wxTREE_HITTEST_ONITEMRIGHT;
 438
 439         return this;
 440     }
 441     else
 442     {
 443         if (!m_isCollapsed)
 444         {
 445             size_t count = m_children.Count();
 446             for ( size_t n = 0; n < count; n++ )
 447             {
 448                 wxGenericTreeItem *res = m_children[n]->HitTest( point, theTree, flags );
 449                 if ( res != NULL )
 450                     return res;
 451             }
 452         }
 453     }
 454
 455     flags|=wxTREE_HITTEST_NOWHERE;
 456
 457     return (wxGenericTreeItem*) NULL;
 458 }
 459
 460 int wxGenericTreeItem::GetCurrentImage() const
 461 {
 462     int image = NO_IMAGE;
 463     if ( IsExpanded() )
 464     {
 465         if ( IsSelected() )
 466         {
 467             image = GetImage(wxTreeItemIcon_SelectedExpanded);
 468         }
 469
 470         if ( image == NO_IMAGE )
 471         {
 472             // we usually fall back to the normal item, but try just the
 473             // expanded one (and not selected) first in this case
 474             image = GetImage(wxTreeItemIcon_Expanded);
 475         }
 476     }
 477     else // not expanded
 478     {
 479         if ( IsSelected() )
 480             image = GetImage(wxTreeItemIcon_Selected);
 481     }
 482
 483     // may be it doesn't have the specific image we want, try the default one
 484     // instead
 485     if ( image == NO_IMAGE )
 486     {
 487         image = GetImage();
 488     }
 489
 490     return image;
 491 }
 492
 493 // -----------------------------------------------------------------------------
 494 // wxTreeCtrl implementation
 495 // -----------------------------------------------------------------------------
 496
 497 IMPLEMENT_DYNAMIC_CLASS(wxTreeCtrl, wxScrolledWindow)
 498
 499 BEGIN_EVENT_TABLE(wxTreeCtrl,wxScrolledWindow)
 500     EVT_PAINT          (wxTreeCtrl::OnPaint)
 501     EVT_MOUSE_EVENTS   (wxTreeCtrl::OnMouse)
 502     EVT_CHAR           (wxTreeCtrl::OnChar)
 503     EVT_SET_FOCUS      (wxTreeCtrl::OnSetFocus)
 504     EVT_KILL_FOCUS     (wxTreeCtrl::OnKillFocus)
 505     EVT_IDLE           (wxTreeCtrl::OnIdle)
 506 END_EVENT_TABLE()
 507
 508 // -----------------------------------------------------------------------------
 509 // construction/destruction
 510 // -----------------------------------------------------------------------------
 511
 512 void wxTreeCtrl::Init()
 513 {
 514     m_current =
 515     m_key_current =
 516     m_anchor = (wxGenericTreeItem *) NULL;
 517     m_hasFocus = FALSE;
 518     m_dirty = FALSE;
 519
 520     m_xScroll = 0;
 521     m_yScroll = 0;
 522     m_lineHeight = 10;
 523     m_indent = 15;
 524     m_spacing = 18;
 525
 526     m_hilightBrush = new wxBrush
 527     (
 528       wxSystemSettings::GetSystemColour(wxSYS_COLOUR_HIGHLIGHT),
 529       wxSOLID
 530     );
 531
 532     m_imageListNormal =
 533     m_imageListState = (wxImageList *) NULL;
 534
 535     m_dragCount = 0;
 536
 537     m_renameTimer = new wxTreeRenameTimer( this );
 538
 539     m_normalFont = wxSystemSettings::GetSystemFont( wxSYS_DEFAULT_GUI_FONT );
 540     m_boldFont = wxFont( m_normalFont.GetPointSize(),
 541                             m_normalFont.GetFamily(),
 542                             m_normalFont.GetStyle(),
 543                             wxBOLD,
 544                             m_normalFont.GetUnderlined());
 545 }
 546
 547 bool wxTreeCtrl::Create(wxWindow *parent, wxWindowID id,
 548                         const wxPoint& pos, const wxSize& size,
 549                         long style,
 550 #if wxUSE_VALIDATORS
 551             const wxValidator &validator,
 552 #endif
 553             const wxString& name )
 554 {
 555     Init();
 556
 557     wxScrolledWindow::Create( parent, id, pos, size, style|wxHSCROLL|wxVSCROLL, name );
 558
 559 #if wxUSE_VALIDATORS
 560     SetValidator( validator );
 561 #endif
 562
 563     SetBackgroundColour( *wxWHITE );
 564 //  m_dottedPen = wxPen( "grey", 0, wxDOT );  too slow under XFree86
 565     m_dottedPen = wxPen( "grey", 0, 0 );
 566
 567     return TRUE;
 568 }
 569
 570 wxTreeCtrl::~wxTreeCtrl()
 571 {
 572     wxDELETE( m_hilightBrush );
 573
 574     DeleteAllItems();
 575
 576     delete m_renameTimer;
 577 }
 578
 579 // -----------------------------------------------------------------------------
 580 // accessors
 581 // -----------------------------------------------------------------------------
 582
 583 size_t wxTreeCtrl::GetCount() const
 584 {
 585     return m_anchor == NULL ? 0u : m_anchor->GetChildrenCount();
 586 }
 587
 588 void wxTreeCtrl::SetIndent(unsigned int indent)
 589 {
 590     m_indent = indent;
 591     m_dirty = TRUE;
 592     Refresh();
 593 }
 594
 595 void wxTreeCtrl::SetSpacing(unsigned int spacing)
 596 {
 597     m_spacing = spacing;
 598     m_dirty = TRUE;
 599     Refresh();
 600 }
 601
 602 size_t wxTreeCtrl::GetChildrenCount(const wxTreeItemId& item, bool recursively)
 603 {
 604     wxCHECK_MSG( item.IsOk(), 0u, wxT("invalid tree item") );
 605
 606     return item.m_pItem->GetChildrenCount(recursively);
 607 }
 608
 609 // -----------------------------------------------------------------------------
 610 // functions to work with tree items
 611 // -----------------------------------------------------------------------------
 612
 613 wxString wxTreeCtrl::GetItemText(const wxTreeItemId& item) const
 614 {
 615     wxCHECK_MSG( item.IsOk(), wxT(""), wxT("invalid tree item") );
 616
 617     return item.m_pItem->GetText();
 618 }
 619
 620 int wxTreeCtrl::GetItemImage(const wxTreeItemId& item,
 621                              wxTreeItemIcon which) const
 622 {
 623     wxCHECK_MSG( item.IsOk(), -1, wxT("invalid tree item") );
 624
 625     return item.m_pItem->GetImage(which);
 626 }
 627
 628 wxTreeItemData *wxTreeCtrl::GetItemData(const wxTreeItemId& item) const
 629 {
 630     wxCHECK_MSG( item.IsOk(), NULL, wxT("invalid tree item") );
 631
 632     return item.m_pItem->GetData();
 633 }
 634
 635 void wxTreeCtrl::SetItemText(const wxTreeItemId& item, const wxString& text)
 636 {
 637     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 638
 639     wxClientDC dc(this);
 640     wxGenericTreeItem *pItem = item.m_pItem;
 641     pItem->SetText(text);
 642     CalculateSize(pItem, dc);
 643     RefreshLine(pItem);
 644 }
 645
 646 void wxTreeCtrl::SetItemImage(const wxTreeItemId& item,
 647                               int image,
 648                               wxTreeItemIcon which)
 649 {
 650     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 651
 652     wxGenericTreeItem *pItem = item.m_pItem;
 653     pItem->SetImage(image, which);
 654
 655     wxClientDC dc(this);
 656     CalculateSize(pItem, dc);
 657     RefreshLine(pItem);
 658 }
 659
 660 void wxTreeCtrl::SetItemData(const wxTreeItemId& item, wxTreeItemData *data)
 661 {
 662     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 663
 664     item.m_pItem->SetData(data);
 665 }
 666
 667 void wxTreeCtrl::SetItemHasChildren(const wxTreeItemId& item, bool has)
 668 {
 669     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 670
 671     wxGenericTreeItem *pItem = item.m_pItem;
 672     pItem->SetHasPlus(has);
 673     RefreshLine(pItem);
 674 }
 675
 676 void wxTreeCtrl::SetItemBold(const wxTreeItemId& item, bool bold)
 677 {
 678     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 679
 680     // avoid redrawing the tree if no real change
 681     wxGenericTreeItem *pItem = item.m_pItem;
 682     if ( pItem->IsBold() != bold )
 683     {
 684         pItem->SetBold(bold);
 685         RefreshLine(pItem);
 686     }
 687 }
 688
 689 void wxTreeCtrl::SetItemTextColour(const wxTreeItemId& item,
 690                                    const wxColour& col)
 691 {
 692     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 693
 694     wxGenericTreeItem *pItem = item.m_pItem;
 695     pItem->Attr().SetTextColour(col);
 696     RefreshLine(pItem);
 697 }
 698
 699 void wxTreeCtrl::SetItemBackgroundColour(const wxTreeItemId& item,
 700                                          const wxColour& col)
 701 {
 702     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 703
 704     wxGenericTreeItem *pItem = item.m_pItem;
 705     pItem->Attr().SetBackgroundColour(col);
 706     RefreshLine(pItem);
 707 }
 708
 709 void wxTreeCtrl::SetItemFont(const wxTreeItemId& item, const wxFont& font)
 710 {
 711     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 712
 713     wxGenericTreeItem *pItem = item.m_pItem;
 714     pItem->Attr().SetFont(font);
 715     RefreshLine(pItem);
 716 }
 717
 718 // -----------------------------------------------------------------------------
 719 // item status inquiries
 720 // -----------------------------------------------------------------------------
 721
 722 bool wxTreeCtrl::IsVisible(const wxTreeItemId& WXUNUSED(item)) const
 723 {
 724     wxFAIL_MSG(wxT("not implemented"));
 725
 726     return TRUE;
 727 }
 728
 729 bool wxTreeCtrl::ItemHasChildren(const wxTreeItemId& item) const
 730 {
 731     wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
 732
 733     return !item.m_pItem->GetChildren().IsEmpty();
 734 }
 735
 736 bool wxTreeCtrl::IsExpanded(const wxTreeItemId& item) const
 737 {
 738     wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
 739
 740     return item.m_pItem->IsExpanded();
 741 }
 742
 743 bool wxTreeCtrl::IsSelected(const wxTreeItemId& item) const
 744 {
 745     wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
 746
 747     return item.m_pItem->IsSelected();
 748 }
 749
 750 bool wxTreeCtrl::IsBold(const wxTreeItemId& item) const
 751 {
 752     wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
 753
 754     return item.m_pItem->IsBold();
 755 }
 756
 757 // -----------------------------------------------------------------------------
 758 // navigation
 759 // -----------------------------------------------------------------------------
 760
 761 wxTreeItemId wxTreeCtrl::GetParent(const wxTreeItemId& item) const
 762 {
 763   wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 764
 765   return item.m_pItem->GetParent();
 766 }
 767
 768 wxTreeItemId wxTreeCtrl::GetFirstChild(const wxTreeItemId& item, long& cookie) const
 769 {
 770   wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 771
 772   cookie = 0;
 773   return GetNextChild(item, cookie);
 774 }
 775
 776 wxTreeItemId wxTreeCtrl::GetNextChild(const wxTreeItemId& item, long& cookie) const
 777 {
 778   wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 779
 780   wxArrayGenericTreeItems& children = item.m_pItem->GetChildren();
 781   if ( (size_t)cookie < children.Count() )
 782   {
 783     return children.Item(cookie++);
 784   }
 785   else
 786   {
 787     // there are no more of them
 788     return wxTreeItemId();
 789   }
 790 }
 791
 792 wxTreeItemId wxTreeCtrl::GetLastChild(const wxTreeItemId& item) const
 793 {
 794   wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 795
 796   wxArrayGenericTreeItems& children = item.m_pItem->GetChildren();
 797   return (children.IsEmpty() ? wxTreeItemId() : wxTreeItemId(children.Last()));
 798 }
 799
 800 wxTreeItemId wxTreeCtrl::GetNextSibling(const wxTreeItemId& item) const
 801 {
 802   wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 803
 804   wxGenericTreeItem *i = item.m_pItem;
 805   wxGenericTreeItem *parent = i->GetParent();
 806   if ( parent == NULL )
 807   {
 808     // root item doesn't have any siblings
 809     return wxTreeItemId();
 810   }
 811
 812   wxArrayGenericTreeItems& siblings = parent->GetChildren();
 813   int index = siblings.Index(i);
 814   wxASSERT( index != wxNOT_FOUND ); // I'm not a child of my parent?
 815
 816   size_t n = (size_t)(index + 1);
 817   return n == siblings.Count() ? wxTreeItemId() : wxTreeItemId(siblings[n]);
 818 }
 819
 820 wxTreeItemId wxTreeCtrl::GetPrevSibling(const wxTreeItemId& item) const
 821 {
 822   wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 823
 824   wxGenericTreeItem *i = item.m_pItem;
 825   wxGenericTreeItem *parent = i->GetParent();
 826   if ( parent == NULL )
 827   {
 828     // root item doesn't have any siblings
 829     return wxTreeItemId();
 830   }
 831
 832   wxArrayGenericTreeItems& siblings = parent->GetChildren();
 833   int index = siblings.Index(i);
 834   wxASSERT( index != wxNOT_FOUND ); // I'm not a child of my parent?
 835
 836   return index == 0 ? wxTreeItemId()
 837                     : wxTreeItemId(siblings[(size_t)(index - 1)]);
 838 }
 839
 840 wxTreeItemId wxTreeCtrl::GetFirstVisibleItem() const
 841 {
 842   wxFAIL_MSG(wxT("not implemented"));
 843
 844   return wxTreeItemId();
 845 }
 846
 847 wxTreeItemId wxTreeCtrl::GetNextVisible(const wxTreeItemId& item) const
 848 {
 849   wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 850
 851   wxFAIL_MSG(wxT("not implemented"));
 852
 853   return wxTreeItemId();
 854 }
 855
 856 wxTreeItemId wxTreeCtrl::GetPrevVisible(const wxTreeItemId& item) const
 857 {
 858   wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 859
 860   wxFAIL_MSG(wxT("not implemented"));
 861
 862   return wxTreeItemId();
 863 }
 864
 865 // -----------------------------------------------------------------------------
 866 // operations
 867 // -----------------------------------------------------------------------------
 868
 869 wxTreeItemId wxTreeCtrl::DoInsertItem(const wxTreeItemId& parentId,
 870                                       size_t previous,
 871                                       const wxString& text,
 872                                       int image, int selImage,
 873                                       wxTreeItemData *data)
 874 {
 875     wxGenericTreeItem *parent = parentId.m_pItem;
 876     if ( !parent )
 877     {
 878         // should we give a warning here?
 879         return AddRoot(text, image, selImage, data);
 880     }
 881
 882     wxClientDC dc(this);
 883     wxGenericTreeItem *item =
 884         new wxGenericTreeItem( parent, text, dc, image, selImage, data );
 885
 886     if ( data != NULL )
 887     {
 888         data->m_pItem = item;
 889     }
 890
 891     parent->Insert( item, previous );
 892
 893     m_dirty = TRUE;
 894
 895     return item;
 896 }
 897
 898 wxTreeItemId wxTreeCtrl::AddRoot(const wxString& text,
 899                                  int image, int selImage,
 900                                  wxTreeItemData *data)
 901 {
 902     wxCHECK_MSG( !m_anchor, wxTreeItemId(), wxT("tree can have only one root") );
 903
 904     wxClientDC dc(this);
 905     m_anchor = new wxGenericTreeItem((wxGenericTreeItem *)NULL, text, dc,
 906                                    image, selImage, data);
 907     if ( data != NULL )
 908     {
 909         data->m_pItem = m_anchor;
 910     }
 911
 912     if (!HasFlag(wxTR_MULTIPLE))
 913     {
 914         m_current = m_key_current = m_anchor;
 915             m_current->SetHilight( TRUE );
 916     }
 917
 918     Refresh();
 919     AdjustMyScrollbars();
 920
 921     return m_anchor;
 922 }
 923
 924 wxTreeItemId wxTreeCtrl::PrependItem(const wxTreeItemId& parent,
 925                                      const wxString& text,
 926                                      int image, int selImage,
 927                                      wxTreeItemData *data)
 928 {
 929     return DoInsertItem(parent, 0u, text, image, selImage, data);
 930 }
 931
 932 wxTreeItemId wxTreeCtrl::InsertItem(const wxTreeItemId& parentId,
 933                                     const wxTreeItemId& idPrevious,
 934                                     const wxString& text,
 935                                     int image, int selImage,
 936                                     wxTreeItemData *data)
 937 {
 938     wxGenericTreeItem *parent = parentId.m_pItem;
 939     if ( !parent )
 940     {
 941         // should we give a warning here?
 942         return AddRoot(text, image, selImage, data);
 943     }
 944
 945     int index = parent->GetChildren().Index(idPrevious.m_pItem);
 946     wxASSERT_MSG( index != wxNOT_FOUND,
 947                   wxT("previous item in wxTreeCtrl::InsertItem() is not a sibling") );
 948
 949     return DoInsertItem(parentId, (size_t)++index, text, image, selImage, data);
 950 }
 951
 952 wxTreeItemId wxTreeCtrl::InsertItem(const wxTreeItemId& parentId,
 953                                     size_t before,
 954                                     const wxString& text,
 955                                     int image, int selImage,
 956                                     wxTreeItemData *data)
 957 {
 958     wxGenericTreeItem *parent = parentId.m_pItem;
 959     if ( !parent )
 960     {
 961         // should we give a warning here?
 962         return AddRoot(text, image, selImage, data);
 963     }
 964
 965     return DoInsertItem(parentId, before, text, image, selImage, data);
 966 }
 967
 968 wxTreeItemId wxTreeCtrl::AppendItem(const wxTreeItemId& parentId,
 969                                     const wxString& text,
 970                                     int image, int selImage,
 971                                     wxTreeItemData *data)
 972 {
 973     wxGenericTreeItem *parent = parentId.m_pItem;
 974     if ( !parent )
 975     {
 976         // should we give a warning here?
 977         return AddRoot(text, image, selImage, data);
 978     }
 979
 980     return DoInsertItem( parent, parent->GetChildren().Count(), text,
 981                          image, selImage, data);
 982 }
 983
 984 void wxTreeCtrl::SendDeleteEvent(wxGenericTreeItem *item)
 985 {
 986     wxTreeEvent event( wxEVT_COMMAND_TREE_DELETE_ITEM, GetId() );
 987     event.m_item = item;
 988     event.SetEventObject( this );
 989     ProcessEvent( event );
 990 }
 991
 992 void wxTreeCtrl::DeleteChildren(const wxTreeItemId& itemId)
 993 {
 994     wxGenericTreeItem *item = itemId.m_pItem;
 995     item->DeleteChildren(this);
 996
 997     m_dirty = TRUE;
 998 }
 999
1000 void wxTreeCtrl::Delete(const wxTreeItemId& itemId)
1001 {
1002     wxGenericTreeItem *item = itemId.m_pItem;
1003     wxGenericTreeItem *parent = item->GetParent();
1004
1005     if ( parent )
1006     {
1007         parent->GetChildren().Remove( item );  // remove by value
1008     }
1009
1010     item->DeleteChildren(this);
1011     SendDeleteEvent(item);
1012     delete item;
1013
1014     m_dirty = TRUE;
1015 }
1016
1017 void wxTreeCtrl::DeleteAllItems()
1018 {
1019     if ( m_anchor )
1020     {
1021         m_anchor->DeleteChildren(this);
1022         delete m_anchor;
1023
1024         m_anchor = NULL;
1025
1026         m_dirty = TRUE;
1027     }
1028 }
1029
1030 void wxTreeCtrl::Expand(const wxTreeItemId& itemId)
1031 {
1032     wxGenericTreeItem *item = itemId.m_pItem;
1033
1034     if ( !item->HasPlus() )
1035         return;
1036
1037     if ( item->IsExpanded() )
1038         return;
1039
1040     wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_EXPANDING, GetId() );
1041     event.m_item = item;
1042     event.SetEventObject( this );
1043
1044 //  if ( ProcessEvent( event ) && event.m_code )  TODO: Was this a typo ?
1045     if ( ProcessEvent( event ) && !event.IsAllowed() )
1046     {
1047         // cancelled by program
1048         return;
1049     }
1050
1051     item->Expand();
1052     CalculatePositions();
1053
1054     RefreshSubtree(item);
1055
1056     event.SetEventType(wxEVT_COMMAND_TREE_ITEM_EXPANDED);
1057     ProcessEvent( event );
1058 }
1059
1060 void wxTreeCtrl::Collapse(const wxTreeItemId& itemId)
1061 {
1062     wxGenericTreeItem *item = itemId.m_pItem;
1063
1064     if ( !item->IsExpanded() )
1065         return;
1066
1067     wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_COLLAPSING, GetId() );
1068     event.m_item = item;
1069     event.SetEventObject( this );
1070     if ( ProcessEvent( event ) && !event.IsAllowed() )
1071     {
1072         // cancelled by program
1073         return;
1074     }
1075
1076     item->Collapse();
1077
1078     wxArrayGenericTreeItems& children = item->GetChildren();
1079     size_t count = children.Count();
1080     for ( size_t n = 0; n < count; n++ )
1081     {
1082         Collapse(children[n]);
1083     }
1084
1085     CalculatePositions();
1086
1087     RefreshSubtree(item);
1088
1089     event.SetEventType(wxEVT_COMMAND_TREE_ITEM_COLLAPSED);
1090     ProcessEvent( event );
1091 }
1092
1093 void wxTreeCtrl::CollapseAndReset(const wxTreeItemId& item)
1094 {
1095     Collapse(item);
1096     DeleteChildren(item);
1097 }
1098
1099 void wxTreeCtrl::Toggle(const wxTreeItemId& itemId)
1100 {
1101     wxGenericTreeItem *item = itemId.m_pItem;
1102
1103     if (item->IsExpanded())
1104         Collapse(itemId);
1105     else
1106         Expand(itemId);
1107 }
1108
1109 void wxTreeCtrl::Unselect()
1110 {
1111     if (m_current)
1112     {
1113         m_current->SetHilight( FALSE );
1114         RefreshLine( m_current );
1115     }
1116 }
1117
1118 void wxTreeCtrl::UnselectAllChildren(wxGenericTreeItem *item)
1119 {
1120     if (item->IsSelected())
1121     {
1122         item->SetHilight(FALSE);
1123         RefreshLine(item);
1124     }
1125
1126     if (item->HasChildren())
1127     {
1128         wxArrayGenericTreeItems& children = item->GetChildren();
1129         size_t count = children.Count();
1130         for ( size_t n = 0; n < count; ++n )
1131         {
1132             UnselectAllChildren(children[n]);
1133         }
1134     }
1135 }
1136
1137 void wxTreeCtrl::UnselectAll()
1138 {
1139     UnselectAllChildren(GetRootItem().m_pItem);
1140 }
1141
1142 // Recursive function !
1143 // To stop we must have crt_item<last_item
1144 // Algorithm :
1145 // Tag all next children, when no more children,
1146 // Move to parent (not to tag)
1147 // Keep going... if we found last_item, we stop.
1148 bool wxTreeCtrl::TagNextChildren(wxGenericTreeItem *crt_item, wxGenericTreeItem *last_item, bool select)
1149 {
1150     wxGenericTreeItem *parent = crt_item->GetParent();
1151
1152     if (parent == NULL) // This is root item
1153         return TagAllChildrenUntilLast(crt_item, last_item, select);
1154
1155     wxArrayGenericTreeItems& children = parent->GetChildren();
1156     int index = children.Index(crt_item);
1157     wxASSERT( index != wxNOT_FOUND ); // I'm not a child of my parent?
1158
1159     size_t count = children.Count();
1160     for (size_t n=(size_t)(index+1); n<count; ++n)
1161     {
1162         if (TagAllChildrenUntilLast(children[n], last_item, select)) return TRUE;
1163     }
1164
1165     return TagNextChildren(parent, last_item, select);
1166 }
1167
1168 bool wxTreeCtrl::TagAllChildrenUntilLast(wxGenericTreeItem *crt_item, wxGenericTreeItem *last_item, bool select)
1169 {
1170     crt_item->SetHilight(select);
1171     RefreshLine(crt_item);
1172
1173     if (crt_item==last_item)
1174         return TRUE;
1175
1176     if (crt_item->HasChildren())
1177     {
1178         wxArrayGenericTreeItems& children = crt_item->GetChildren();
1179         size_t count = children.Count();
1180         for ( size_t n = 0; n < count; ++n )
1181         {
1182             if (TagAllChildrenUntilLast(children[n], last_item, select))
1183                 return TRUE;
1184             }
1185     }
1186
1187   return FALSE;
1188 }
1189
1190 void wxTreeCtrl::SelectItemRange(wxGenericTreeItem *item1, wxGenericTreeItem *item2)
1191 {
1192     // item2 is not necessary after item1
1193     wxGenericTreeItem *first=NULL, *last=NULL;
1194
1195     // choice first' and 'last' between item1 and item2
1196     if (item1->GetY()<item2->GetY())
1197     {
1198         first=item1;
1199         last=item2;
1200     }
1201     else
1202     {
1203         first=item2;
1204         last=item1;
1205     }
1206
1207     bool select = m_current->IsSelected();
1208
1209     if ( TagAllChildrenUntilLast(first,last,select) )
1210         return;
1211
1212     TagNextChildren(first,last,select);
1213 }
1214
1215 void wxTreeCtrl::SelectItem(const wxTreeItemId& itemId,
1216                             bool unselect_others,
1217                             bool extended_select)
1218 {
1219     wxCHECK_RET( itemId.IsOk(), wxT("invalid tree item") );
1220
1221     bool is_single=!(GetWindowStyleFlag() & wxTR_MULTIPLE);
1222     wxGenericTreeItem *item = itemId.m_pItem;
1223
1224     //wxCHECK_RET( ( (!unselect_others) && is_single),
1225     //           wxT("this is a single selection tree") );
1226
1227     // to keep going anyhow !!!
1228     if (is_single)
1229     {
1230         if (item->IsSelected())
1231             return; // nothing to do
1232         unselect_others = TRUE;
1233         extended_select = FALSE;
1234     }
1235     else if ( unselect_others && item->IsSelected() )
1236     {
1237         // selection change if there is more than one item currently selected
1238         wxArrayTreeItemIds selected_items;
1239         if ( GetSelections(selected_items) == 1 )
1240             return;
1241     }
1242
1243     wxTreeEvent event( wxEVT_COMMAND_TREE_SEL_CHANGING, GetId() );
1244     event.m_item = item;
1245     event.m_itemOld = m_current;
1246     event.SetEventObject( this );
1247     // TODO : Here we don't send any selection mode yet !
1248
1249     if ( GetEventHandler()->ProcessEvent( event ) && !event.IsAllowed() )
1250       return;
1251
1252     // ctrl press
1253     if (unselect_others)
1254     {
1255         if (is_single) Unselect(); // to speed up thing
1256         else UnselectAll();
1257     }
1258
1259     // shift press
1260     if (extended_select)
1261     {
1262         if (m_current == NULL) m_current=m_key_current=GetRootItem().m_pItem;
1263         // don't change the mark (m_current)
1264         SelectItemRange(m_current, item);
1265     }
1266     else
1267     {
1268         bool select=TRUE; // the default
1269
1270         // Check if we need to toggle hilight (ctrl mode)
1271         if (!unselect_others)
1272           select=!item->IsSelected();
1273
1274         m_current = m_key_current = item;
1275         m_current->SetHilight(select);
1276         RefreshLine( m_current );
1277     }
1278
1279     event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGED);
1280     GetEventHandler()->ProcessEvent( event );
1281 }
1282
1283 void wxTreeCtrl::FillArray(wxGenericTreeItem *item,
1284                            wxArrayTreeItemIds &array) const
1285 {
1286     if ( item->IsSelected() )
1287         array.Add(wxTreeItemId(item));
1288
1289     if ( item->HasChildren() )
1290     {
1291         wxArrayGenericTreeItems& children = item->GetChildren();
1292         size_t count = children.GetCount();
1293         for ( size_t n = 0; n < count; ++n )
1294             FillArray(children[n],array);
1295     }
1296 }
1297
1298 size_t wxTreeCtrl::GetSelections(wxArrayTreeItemIds &array) const
1299 {
1300   array.Empty();
1301   FillArray(GetRootItem().m_pItem, array);
1302
1303   return array.Count();
1304 }
1305
1306 void wxTreeCtrl::EnsureVisible(const wxTreeItemId& item)
1307 {
1308     if (!item.IsOk()) return;
1309
1310     wxGenericTreeItem *gitem = item.m_pItem;
1311
1312     // first expand all parent branches
1313     wxGenericTreeItem *parent = gitem->GetParent();
1314     while ( parent )
1315     {
1316         Expand(parent);
1317         parent = parent->GetParent();
1318     }
1319
1320     //if (parent) CalculatePositions();
1321
1322     ScrollTo(item);
1323 }
1324
1325 void wxTreeCtrl::ScrollTo(const wxTreeItemId &item)
1326 {
1327     if (!item.IsOk()) return;
1328
1329     // We have to call this here because the label in
1330     // question might just have been added and no screen
1331     // update taken place.
1332     if (m_dirty) wxYield();
1333
1334     wxGenericTreeItem *gitem = item.m_pItem;
1335
1336     // now scroll to the item
1337     int item_y = gitem->GetY();
1338
1339     int start_x = 0;
1340     int start_y = 0;
1341     ViewStart( &start_x, &start_y );
1342     start_y *= PIXELS_PER_UNIT;
1343
1344     int client_h = 0;
1345     int client_w = 0;
1346     GetClientSize( &client_w, &client_h );
1347
1348     if (item_y < start_y+3)
1349     {
1350         // going down
1351         int x = 0;
1352         int y = 0;
1353         m_anchor->GetSize( x, y, this );
1354         y += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1355         x += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1356         int x_pos = GetScrollPos( wxHORIZONTAL );
1357         // Item should appear at top
1358         SetScrollbars( PIXELS_PER_UNIT, PIXELS_PER_UNIT, x/PIXELS_PER_UNIT, y/PIXELS_PER_UNIT, x_pos, item_y/PIXELS_PER_UNIT );
1359     }
1360     else if (item_y+GetLineHeight(gitem) > start_y+client_h)
1361     {
1362         // going up
1363         int x = 0;
1364         int y = 0;
1365         m_anchor->GetSize( x, y, this );
1366         y += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1367         x += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1368         item_y += PIXELS_PER_UNIT+2;
1369         int x_pos = GetScrollPos( wxHORIZONTAL );
1370         // Item should appear at bottom
1371         SetScrollbars( PIXELS_PER_UNIT, PIXELS_PER_UNIT, x/PIXELS_PER_UNIT, y/PIXELS_PER_UNIT, x_pos, (item_y+GetLineHeight(gitem)-client_h)/PIXELS_PER_UNIT );
1372     }
1373 }
1374
1375 // FIXME: tree sorting functions are not reentrant and not MT-safe!
1376 static wxTreeCtrl *s_treeBeingSorted = NULL;
1377
1378 static int LINKAGEMODE tree_ctrl_compare_func(wxGenericTreeItem **item1,
1379                                   wxGenericTreeItem **item2)
1380 {
1381     wxCHECK_MSG( s_treeBeingSorted, 0, wxT("bug in wxTreeCtrl::SortChildren()") );
1382
1383     return s_treeBeingSorted->OnCompareItems(*item1, *item2);
1384 }
1385
1386 int wxTreeCtrl::OnCompareItems(const wxTreeItemId& item1,
1387                                const wxTreeItemId& item2)
1388 {
1389     return wxStrcmp(GetItemText(item1), GetItemText(item2));
1390 }
1391
1392 void wxTreeCtrl::SortChildren(const wxTreeItemId& itemId)
1393 {
1394     wxCHECK_RET( itemId.IsOk(), wxT("invalid tree item") );
1395
1396     wxGenericTreeItem *item = itemId.m_pItem;
1397
1398     wxCHECK_RET( !s_treeBeingSorted,
1399                  wxT("wxTreeCtrl::SortChildren is not reentrant") );
1400
1401     wxArrayGenericTreeItems& children = item->GetChildren();
1402     if ( children.Count() > 1 )
1403     {
1404         s_treeBeingSorted = this;
1405         children.Sort(tree_ctrl_compare_func);
1406         s_treeBeingSorted = NULL;
1407
1408         m_dirty = TRUE;
1409     }
1410     //else: don't make the tree dirty as nothing changed
1411 }
1412
1413 wxImageList *wxTreeCtrl::GetImageList() const
1414 {
1415     return m_imageListNormal;
1416 }
1417
1418 wxImageList *wxTreeCtrl::GetStateImageList() const
1419 {
1420     return m_imageListState;
1421 }
1422
1423 void wxTreeCtrl::SetImageList(wxImageList *imageList)
1424 {
1425     m_imageListNormal = imageList;
1426
1427     // Calculate a m_lineHeight value from the image sizes.
1428     // May be toggle off. Then wxTreeCtrl will spread when
1429     // necessary (which might look ugly).
1430 #if 1
1431     wxClientDC dc(this);
1432     m_lineHeight = (int)(dc.GetCharHeight() + 4);
1433     int width = 0, height = 0,
1434         n = m_imageListNormal->GetImageCount();
1435
1436     for (int i = 0; i < n ; i++)
1437     {
1438         m_imageListNormal->GetSize(i, width, height);
1439         if (height > m_lineHeight) m_lineHeight = height;
1440     }
1441
1442     if (m_lineHeight < 40)
1443         m_lineHeight += 2;                 // at least 2 pixels
1444     else
1445         m_lineHeight += m_lineHeight/10;   // otherwise 10% extra spacing
1446 #endif
1447 }
1448
1449 void wxTreeCtrl::SetStateImageList(wxImageList *imageList)
1450 {
1451     m_imageListState = imageList;
1452 }
1453
1454 // -----------------------------------------------------------------------------
1455 // helpers
1456 // -----------------------------------------------------------------------------
1457
1458 void wxTreeCtrl::AdjustMyScrollbars()
1459 {
1460     if (m_anchor)
1461     {
1462         int x = 0;
1463         int y = 0;
1464         m_anchor->GetSize( x, y, this );
1465         y += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1466         x += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1467         int x_pos = GetScrollPos( wxHORIZONTAL );
1468         int y_pos = GetScrollPos( wxVERTICAL );
1469         SetScrollbars( PIXELS_PER_UNIT, PIXELS_PER_UNIT, x/PIXELS_PER_UNIT, y/PIXELS_PER_UNIT, x_pos, y_pos );
1470     }
1471     else
1472     {
1473         SetScrollbars( 0, 0, 0, 0 );
1474     }
1475 }
1476
1477 int wxTreeCtrl::GetLineHeight(wxGenericTreeItem *item) const
1478 {
1479     if (GetWindowStyleFlag() & wxTR_HAS_VARIABLE_ROW_HEIGHT)
1480         return item->GetHeight();
1481     else
1482         return m_lineHeight;
1483 }
1484
1485 void wxTreeCtrl::PaintItem(wxGenericTreeItem *item, wxDC& dc)
1486 {
1487     wxTreeItemAttr *attr = item->GetAttributes();
1488     if ( attr && attr->HasFont() )
1489         dc.SetFont(attr->GetFont());
1490     else if (item->IsBold())
1491         dc.SetFont(m_boldFont);
1492
1493     long text_w = 0;
1494     long text_h = 0;
1495     dc.GetTextExtent( item->GetText(), &text_w, &text_h );
1496
1497     int image_h = 0;
1498     int image_w = 0;
1499     int image = item->GetCurrentImage();
1500     if ( image != NO_IMAGE )
1501     {
1502         m_imageListNormal->GetSize( image, image_w, image_h );
1503         image_w += 4;
1504     }
1505
1506     int total_h = GetLineHeight(item);
1507
1508     dc.DrawRectangle( item->GetX()-2, item->GetY(), item->GetWidth()+2, total_h );
1509
1510     if ( image != NO_IMAGE )
1511     {
1512         dc.SetClippingRegion( item->GetX(), item->GetY(), image_w-2, total_h );
1513         m_imageListNormal->Draw( image, dc,
1514                                  item->GetX(),
1515                                  item->GetY() +((total_h > image_h)?((total_h-image_h)/2):0),
1516                                  wxIMAGELIST_DRAW_TRANSPARENT );
1517         dc.DestroyClippingRegion();
1518     }
1519
1520     bool hasBgCol = attr && attr->HasBackgroundColour();
1521     dc.SetBackgroundMode(hasBgCol ? wxSOLID : wxTRANSPARENT);
1522     if ( hasBgCol )
1523         dc.SetTextBackground(attr->GetBackgroundColour());
1524     dc.DrawText( item->GetText(), image_w + item->GetX(), item->GetY()
1525                  + ((total_h > text_h) ? (total_h - text_h)/2 : 0));
1526
1527     // restore normal font
1528     dc.SetFont( m_normalFont );
1529 }
1530
1531 // Now y stands for the top of the item, whereas it used to stand for middle !
1532 void wxTreeCtrl::PaintLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y )
1533 {
1534     int horizX = level*m_indent;
1535
1536     item->SetX( horizX+m_indent+m_spacing );
1537     item->SetY( y );
1538
1539     int oldY = y;
1540     y+=GetLineHeight(item)/2;
1541
1542     item->SetCross( horizX+m_indent, y );
1543
1544     int exposed_x = dc.LogicalToDeviceX( 0 );
1545     int exposed_y = dc.LogicalToDeviceY( item->GetY() );
1546
1547     if (IsExposed( exposed_x, exposed_y, 10000, GetLineHeight(item) ))  // 10000 = very much
1548     {
1549         int startX = horizX;
1550         int endX = horizX + (m_indent-5);
1551
1552 //        if (!item->HasChildren()) endX += (m_indent+5);
1553         if (!item->HasChildren()) endX += 20;
1554
1555         dc.DrawLine( startX, y, endX, y );
1556
1557         if (item->HasPlus())
1558         {
1559             dc.DrawLine( horizX+(m_indent+5), y, horizX+(m_indent+15), y );
1560             dc.SetPen( *wxGREY_PEN );
1561             dc.SetBrush( *wxWHITE_BRUSH );
1562             dc.DrawRectangle( horizX+(m_indent-5), y-4, 11, 9 );
1563
1564             dc.SetPen( *wxBLACK_PEN );
1565             dc.DrawLine( horizX+(m_indent-2), y, horizX+(m_indent+3), y );
1566             if (!item->IsExpanded())
1567                 dc.DrawLine( horizX+m_indent, y-2, horizX+m_indent, y+3 );
1568
1569             dc.SetPen( m_dottedPen );
1570         }
1571
1572         wxPen *pen = wxTRANSPARENT_PEN;
1573         wxBrush *brush;                 // FIXME is this really needed?
1574         wxColour colText;
1575
1576         if ( item->IsSelected() )
1577         {
1578             colText = wxSystemSettings::GetSystemColour( wxSYS_COLOUR_HIGHLIGHTTEXT );
1579
1580             brush = m_hilightBrush;
1581
1582             if ( m_hasFocus )
1583                pen = wxBLACK_PEN;
1584
1585         }
1586         else
1587         {
1588             wxTreeItemAttr *attr = item->GetAttributes();
1589             if ( attr && attr->HasTextColour() )
1590                 colText = attr->GetTextColour();
1591             else
1592                 colText = *wxBLACK;
1593
1594             brush = wxWHITE_BRUSH;
1595         }
1596
1597         // prepare to draw
1598         dc.SetTextForeground(colText);
1599         dc.SetPen(*pen);
1600         dc.SetBrush(*brush);
1601
1602         // draw
1603         PaintItem(item, dc);
1604
1605         // restore DC objects
1606         dc.SetBrush( *wxWHITE_BRUSH );
1607         dc.SetPen( m_dottedPen );
1608         dc.SetTextForeground( *wxBLACK );
1609     }
1610
1611     y = oldY+GetLineHeight(item);
1612
1613     if (item->IsExpanded())
1614     {
1615         oldY+=GetLineHeight(item)/2;
1616         int semiOldY=0;
1617
1618         wxArrayGenericTreeItems& children = item->GetChildren();
1619         size_t n, count = children.Count();
1620         for ( n = 0; n < count; ++n )
1621         {
1622             semiOldY=y;
1623             PaintLevel( children[n], dc, level+1, y );
1624         }
1625
1626         // it may happen that the item is expanded but has no items (when you
1627         // delete all its children for example) - don't draw the vertical line
1628         // in this case
1629         if (count > 0)
1630         {
1631             semiOldY+=GetLineHeight(children[--n])/2;
1632             dc.DrawLine( horizX+m_indent, oldY+5, horizX+m_indent, semiOldY );
1633         }
1634     }
1635 }
1636
1637 void wxTreeCtrl::DrawBorder(wxTreeItemId &item)
1638 {
1639   if (!item) return;
1640
1641     wxGenericTreeItem *i=item.m_pItem;
1642
1643     wxClientDC dc(this);
1644     PrepareDC( dc );
1645     dc.SetLogicalFunction(wxINVERT);
1646
1647     int w,h,x;
1648     ViewStart(&x,&h);     // we only need x
1649     GetClientSize(&w,&h); // we only need w
1650
1651     h=GetLineHeight(i)+1;
1652     // 2 white column at border
1653     dc.DrawRectangle( PIXELS_PER_UNIT*x+2, i->GetY()-1, w-6, h);
1654 }
1655
1656 void wxTreeCtrl::DrawLine(wxTreeItemId &item, bool below)
1657 {
1658   if (!item) return;
1659
1660     wxGenericTreeItem *i=item.m_pItem;
1661
1662     wxClientDC dc(this);
1663     PrepareDC( dc );
1664     dc.SetLogicalFunction(wxINVERT);
1665
1666     int w,h,y;
1667     GetSize(&w,&h);
1668
1669     if (below) y=i->GetY()+GetLineHeight(i)-1;
1670     else y=i->GetY();
1671
1672     dc.DrawLine( 0, y, w, y);
1673 }
1674
1675 // -----------------------------------------------------------------------------
1676 // wxWindows callbacks
1677 // -----------------------------------------------------------------------------
1678
1679 void wxTreeCtrl::OnPaint( wxPaintEvent &WXUNUSED(event) )
1680 {
1681     if ( !m_anchor)
1682         return;
1683
1684     wxPaintDC dc(this);
1685     PrepareDC( dc );
1686
1687     dc.SetFont( m_normalFont );
1688     dc.SetPen( m_dottedPen );
1689
1690     // this is now done dynamically
1691     //if(GetImageList() == NULL)
1692     // m_lineHeight = (int)(dc.GetCharHeight() + 4);
1693
1694     int y = 2;
1695     PaintLevel( m_anchor, dc, 0, y );
1696 }
1697
1698 void wxTreeCtrl::OnSetFocus( wxFocusEvent &WXUNUSED(event) )
1699 {
1700     m_hasFocus = TRUE;
1701
1702     if (m_current) RefreshLine( m_current );
1703 }
1704
1705 void wxTreeCtrl::OnKillFocus( wxFocusEvent &WXUNUSED(event) )
1706 {
1707     m_hasFocus = FALSE;
1708
1709     if (m_current) RefreshLine( m_current );
1710 }
1711
1712 void wxTreeCtrl::OnChar( wxKeyEvent &event )
1713 {
1714     wxTreeEvent te( wxEVT_COMMAND_TREE_KEY_DOWN, GetId() );
1715     te.m_code = event.KeyCode();
1716     te.SetEventObject( this );
1717     GetEventHandler()->ProcessEvent( te );
1718
1719     if ( (m_current == 0) || (m_key_current == 0) )
1720     {
1721         event.Skip();
1722         return;
1723     }
1724
1725     bool is_multiple=(GetWindowStyleFlag() & wxTR_MULTIPLE);
1726     bool extended_select=(event.ShiftDown() && is_multiple);
1727     bool unselect_others=!(extended_select || (event.ControlDown() && is_multiple));
1728
1729     switch (event.KeyCode())
1730     {
1731         case '+':
1732         case WXK_ADD:
1733             if (m_current->HasPlus() && !IsExpanded(m_current))
1734             {
1735                 Expand(m_current);
1736             }
1737             break;
1738
1739         case '-':
1740         case WXK_SUBTRACT:
1741             if (IsExpanded(m_current))
1742             {
1743                 Collapse(m_current);
1744             }
1745             break;
1746
1747         case '*':
1748         case WXK_MULTIPLY:
1749             Toggle(m_current);
1750             break;
1751
1752         case ' ':
1753         case WXK_RETURN:
1754             {
1755                 wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_ACTIVATED, GetId() );
1756                 event.m_item = m_current;
1757                 event.m_code = 0;
1758                 event.SetEventObject( this );
1759                 GetEventHandler()->ProcessEvent( event );
1760             }
1761             break;
1762
1763             // up goes to the previous sibling or to the last of its children if
1764             // it's expanded
1765         case WXK_UP:
1766             {
1767                 wxTreeItemId prev = GetPrevSibling( m_key_current );
1768                 if (!prev)
1769                 {
1770                     prev = GetParent( m_key_current );
1771                     if (prev)
1772                     {
1773                         long cockie = 0;
1774                         wxTreeItemId current = m_key_current;
1775                         if (current == GetFirstChild( prev, cockie ))
1776                         {
1777                             // otherwise we return to where we came from
1778                             SelectItem( prev, unselect_others, extended_select );
1779                             m_key_current=prev.m_pItem;
1780                             EnsureVisible( prev );
1781                             break;
1782                         }
1783                     }
1784                 }
1785                 if (prev)
1786                 {
1787                     while ( IsExpanded(prev) && HasChildren(prev) )
1788                     {
1789                         wxTreeItemId child = GetLastChild(prev);
1790                         if ( child )
1791                         {
1792                             prev = child;
1793                         }
1794                     }
1795
1796                     SelectItem( prev, unselect_others, extended_select );
1797                     m_key_current=prev.m_pItem;
1798                     EnsureVisible( prev );
1799                 }
1800             }
1801             break;
1802
1803             // left arrow goes to the parent
1804         case WXK_LEFT:
1805             {
1806                 wxTreeItemId prev = GetParent( m_current );
1807                 if (prev)
1808                 {
1809                     EnsureVisible( prev );
1810                     SelectItem( prev, unselect_others, extended_select );
1811                 }
1812             }
1813             break;
1814
1815         case WXK_RIGHT:
1816             // this works the same as the down arrow except that we also expand the
1817             // item if it wasn't expanded yet
1818             Expand(m_current);
1819             // fall through
1820
1821         case WXK_DOWN:
1822             {
1823                 if (IsExpanded(m_key_current) && HasChildren(m_key_current))
1824                 {
1825                     long cookie = 0;
1826                     wxTreeItemId child = GetFirstChild( m_key_current, cookie );
1827                     SelectItem( child, unselect_others, extended_select );
1828                     m_key_current=child.m_pItem;
1829                     EnsureVisible( child );
1830                 }
1831                 else
1832                 {
1833                     wxTreeItemId next = GetNextSibling( m_key_current );
1834 //                    if (next == 0)
1835                     if (!next)
1836                     {
1837                         wxTreeItemId current = m_key_current;
1838                         while (current && !next)
1839                         {
1840                             current = GetParent( current );
1841                             if (current) next = GetNextSibling( current );
1842                         }
1843                     }
1844 //                    if (next != 0)
1845                     if (next)
1846                     {
1847                         SelectItem( next, unselect_others, extended_select );
1848                         m_key_current=next.m_pItem;
1849                         EnsureVisible( next );
1850                     }
1851                 }
1852             }
1853             break;
1854
1855             // <End> selects the last visible tree item
1856         case WXK_END:
1857             {
1858                 wxTreeItemId last = GetRootItem();
1859
1860                 while ( last.IsOk() && IsExpanded(last) )
1861                 {
1862                     wxTreeItemId lastChild = GetLastChild(last);
1863
1864                     // it may happen if the item was expanded but then all of
1865                     // its children have been deleted - so IsExpanded() returned
1866                     // TRUE, but GetLastChild() returned invalid item
1867                     if ( !lastChild )
1868                         break;
1869
1870                     last = lastChild;
1871                 }
1872
1873                 if ( last.IsOk() )
1874                 {
1875                     EnsureVisible( last );
1876                     SelectItem( last, unselect_others, extended_select );
1877                 }
1878             }
1879             break;
1880
1881             // <Home> selects the root item
1882         case WXK_HOME:
1883             {
1884                 wxTreeItemId prev = GetRootItem();
1885                 if (prev)
1886                 {
1887                     EnsureVisible( prev );
1888                     SelectItem( prev, unselect_others, extended_select );
1889                 }
1890             }
1891             break;
1892
1893         default:
1894             event.Skip();
1895     }
1896 }
1897
1898 wxTreeItemId wxTreeCtrl::HitTest(const wxPoint& point, int& flags)
1899 {
1900     // We have to call this here because the label in
1901     // question might just have been added and no screen
1902     // update taken place.
1903     if (m_dirty) wxYield();
1904
1905     wxClientDC dc(this);
1906     PrepareDC(dc);
1907     long x = dc.DeviceToLogicalX( (long)point.x );
1908     long y = dc.DeviceToLogicalY( (long)point.y );
1909     int w, h;
1910     GetSize(&w, &h);
1911
1912     flags=0;
1913     if (point.x<0) flags|=wxTREE_HITTEST_TOLEFT;
1914     if (point.x>w) flags|=wxTREE_HITTEST_TORIGHT;
1915     if (point.y<0) flags|=wxTREE_HITTEST_ABOVE;
1916     if (point.y>h) flags|=wxTREE_HITTEST_BELOW;
1917
1918     return m_anchor->HitTest( wxPoint(x, y), this, flags);
1919 }
1920
1921 /* **** */
1922
1923 void wxTreeCtrl::Edit( const wxTreeItemId& item )
1924 {
1925     if (!item.IsOk()) return;
1926
1927     m_currentEdit = item.m_pItem;
1928
1929     wxTreeEvent te( wxEVT_COMMAND_TREE_BEGIN_LABEL_EDIT, GetId() );
1930     te.m_item = m_currentEdit;
1931     te.SetEventObject( this );
1932     GetEventHandler()->ProcessEvent( te );
1933
1934     if (!te.IsAllowed()) return;
1935
1936     // We have to call this here because the label in
1937     // question might just have been added and no screen
1938     // update taken place.
1939     if (m_dirty) wxYield();
1940
1941     wxString s = m_currentEdit->GetText();
1942     int x = m_currentEdit->GetX();
1943     int y = m_currentEdit->GetY();
1944     int w = m_currentEdit->GetWidth();
1945     int h = m_currentEdit->GetHeight();
1946
1947     int image_h = 0;
1948     int image_w = 0;
1949
1950     int image = m_currentEdit->GetCurrentImage();
1951     if ( image != NO_IMAGE )
1952     {
1953         m_imageListNormal->GetSize( image, image_w, image_h );
1954         image_w += 4;
1955     }
1956     x += image_w;
1957     w -= image_w + 4; // I don't know why +4 is needed
1958
1959     wxClientDC dc(this);
1960     PrepareDC( dc );
1961     x = dc.LogicalToDeviceX( x );
1962     y = dc.LogicalToDeviceY( y );
1963
1964     wxTreeTextCtrl *text = new wxTreeTextCtrl(
1965       this, -1, &m_renameAccept, &m_renameRes, this, s, wxPoint(x-4,y-4), wxSize(w+11,h+8) );
1966     text->SetFocus();
1967 }
1968
1969 void wxTreeCtrl::OnRenameTimer()
1970 {
1971     Edit( m_current );
1972 }
1973
1974 void wxTreeCtrl::OnRenameAccept()
1975 {
1976     wxTreeEvent le( wxEVT_COMMAND_TREE_END_LABEL_EDIT, GetId() );
1977     le.m_item = m_currentEdit;
1978     le.SetEventObject( this );
1979     le.m_label = m_renameRes;
1980     GetEventHandler()->ProcessEvent( le );
1981
1982     if (!le.IsAllowed()) return;
1983
1984     SetItemText( m_currentEdit, m_renameRes );
1985 }
1986
1987 void wxTreeCtrl::OnMouse( wxMouseEvent &event )
1988 {
1989     if ( !(event.LeftUp() || event.RightDown() || event.LeftDClick() || event.Dragging()) ) return;
1990
1991     if ( !m_anchor ) return;
1992
1993     wxClientDC dc(this);
1994     PrepareDC(dc);
1995     long x = dc.DeviceToLogicalX( (long)event.GetX() );
1996     long y = dc.DeviceToLogicalY( (long)event.GetY() );
1997
1998     int flags=0;
1999     wxGenericTreeItem *item = m_anchor->HitTest( wxPoint(x,y), this, flags);
2000     bool onButton = flags & wxTREE_HITTEST_ONITEMBUTTON;
2001
2002     if (event.Dragging())
2003     {
2004         if (m_dragCount == 0)
2005             m_dragStart = wxPoint(x,y);
2006
2007         m_dragCount++;
2008
2009         if (m_dragCount != 3) return;
2010
2011         int command = wxEVT_COMMAND_TREE_BEGIN_DRAG;
2012         if (event.RightIsDown()) command = wxEVT_COMMAND_TREE_BEGIN_RDRAG;
2013
2014         wxTreeEvent nevent( command, GetId() );
2015         nevent.m_item = m_current;
2016         nevent.SetEventObject(this);
2017         GetEventHandler()->ProcessEvent(nevent);
2018         return;
2019     }
2020     else
2021     {
2022         m_dragCount = 0;
2023     }
2024
2025     if (item == NULL) return;  /* we hit the blank area */
2026
2027     if (event.RightDown()) {
2028         wxTreeEvent nevent(wxEVT_COMMAND_TREE_ITEM_RIGHT_CLICK,GetId());
2029         nevent.m_item=item;
2030         nevent.m_code=0;
2031         nevent.SetEventObject(this);
2032         GetEventHandler()->ProcessEvent(nevent);
2033         return;
2034     }
2035
2036     if (event.LeftUp() && (item == m_current) &&
2037         (flags & wxTREE_HITTEST_ONITEMLABEL) &&
2038         HasFlag(wxTR_EDIT_LABELS) )
2039     {
2040         m_renameTimer->Start( 100, TRUE );
2041         return;
2042     }
2043
2044     bool is_multiple=(GetWindowStyleFlag() & wxTR_MULTIPLE);
2045     bool extended_select=(event.ShiftDown() && is_multiple);
2046     bool unselect_others=!(extended_select || (event.ControlDown() && is_multiple));
2047
2048     if (onButton)
2049     {
2050         Toggle( item );
2051         if (is_multiple)
2052             return;
2053     }
2054
2055     SelectItem(item, unselect_others, extended_select);
2056
2057     if (event.LeftDClick())
2058     {
2059         wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_ACTIVATED, GetId() );
2060         event.m_item = item;
2061         event.m_code = 0;
2062         event.SetEventObject( this );
2063         GetEventHandler()->ProcessEvent( event );
2064     }
2065 }
2066
2067 void wxTreeCtrl::OnIdle( wxIdleEvent &WXUNUSED(event) )
2068 {
2069     /* after all changes have been done to the tree control,
2070      * we actually redraw the tree when everything is over */
2071
2072     if (!m_dirty)
2073         return;
2074
2075     m_dirty = FALSE;
2076
2077     CalculatePositions();
2078     Refresh();
2079     AdjustMyScrollbars();
2080 }
2081
2082 void wxTreeCtrl::CalculateSize( wxGenericTreeItem *item, wxDC &dc )
2083 {
2084     long text_w = 0;
2085     long text_h = 0;
2086
2087     if (item->IsBold())
2088         dc.SetFont(m_boldFont);
2089
2090     dc.GetTextExtent( item->GetText(), &text_w, &text_h );
2091     text_h+=2;
2092
2093     // restore normal font
2094     dc.SetFont( m_normalFont );
2095
2096     int image_h = 0;
2097     int image_w = 0;
2098     int image = item->GetCurrentImage();
2099     if ( image != NO_IMAGE )
2100     {
2101         m_imageListNormal->GetSize( image, image_w, image_h );
2102         image_w += 4;
2103     }
2104
2105     int total_h = (image_h > text_h) ? image_h : text_h;
2106
2107     if (total_h < 40)
2108         total_h += 2;            // at least 2 pixels
2109     else
2110         total_h += total_h/10;   // otherwise 10% extra spacing
2111
2112     item->SetHeight(total_h);
2113     if (total_h>m_lineHeight) m_lineHeight=total_h;
2114
2115     item->SetWidth(image_w+text_w+2);
2116 }
2117
2118 // -----------------------------------------------------------------------------
2119 // for developper : y is now the top of the level
2120 // not the middle of it !
2121 void wxTreeCtrl::CalculateLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y )
2122 {
2123     int horizX = level*m_indent;
2124
2125     CalculateSize( item, dc );
2126
2127     // set its position
2128     item->SetX( horizX+m_indent+m_spacing );
2129     item->SetY( y );
2130     y+=GetLineHeight(item);
2131
2132     if ( !item->IsExpanded() )
2133     {
2134         // we dont need to calculate collapsed branches
2135         return;
2136     }
2137
2138     wxArrayGenericTreeItems& children = item->GetChildren();
2139     size_t n, count = children.Count();
2140     for (n = 0; n < count; ++n )
2141         CalculateLevel( children[n], dc, level+1, y );  // recurse
2142 }
2143
2144 void wxTreeCtrl::CalculatePositions()
2145 {
2146     if ( !m_anchor ) return;
2147
2148     wxClientDC dc(this);
2149     PrepareDC( dc );
2150
2151     dc.SetFont( m_normalFont );
2152
2153     dc.SetPen( m_dottedPen );
2154     //if(GetImageList() == NULL)
2155     // m_lineHeight = (int)(dc.GetCharHeight() + 4);
2156
2157     int y = 2;
2158     CalculateLevel( m_anchor, dc, 0, y ); // start recursion
2159 }
2160
2161 void wxTreeCtrl::RefreshSubtree(wxGenericTreeItem *item)
2162 {
2163     wxClientDC dc(this);
2164     PrepareDC(dc);
2165
2166     int cw = 0;
2167     int ch = 0;
2168     GetClientSize( &cw, &ch );
2169
2170     wxRect rect;
2171     rect.x = dc.LogicalToDeviceX( 0 );
2172     rect.width = cw;
2173     rect.y = dc.LogicalToDeviceY( item->GetY() );
2174     rect.height = ch;
2175
2176     Refresh( TRUE, &rect );
2177
2178     AdjustMyScrollbars();
2179 }
2180
2181 void wxTreeCtrl::RefreshLine( wxGenericTreeItem *item )
2182 {
2183     wxClientDC dc(this);
2184     PrepareDC( dc );
2185
2186     int cw = 0;
2187     int ch = 0;
2188     GetClientSize( &cw, &ch );
2189
2190     wxRect rect;
2191     rect.x = dc.LogicalToDeviceX( 0 );
2192     rect.y = dc.LogicalToDeviceY( item->GetY() );
2193     rect.width = cw;
2194     rect.height = GetLineHeight(item); //dc.GetCharHeight() + 6;
2195
2196     Refresh( TRUE, &rect );
2197 }
2198