src/generic/treectlg.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        treectlg.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 "treectlg.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 #if wxUSE_TREECTRL
  32
  33 #include "wx/treebase.h"
  34 #include "wx/generic/treectlg.h"
  35 #include "wx/timer.h"
  36 #include "wx/textctrl.h"
  37 #include "wx/imaglist.h"
  38 #include "wx/settings.h"
  39 #include "wx/dcclient.h"
  40
  41 // -----------------------------------------------------------------------------
  42 // array types
  43 // -----------------------------------------------------------------------------
  44
  45 class WXDLLEXPORT wxGenericTreeItem;
  46
  47 WX_DEFINE_EXPORTED_ARRAY(wxGenericTreeItem *, wxArrayGenericTreeItems);
  48 //WX_DEFINE_OBJARRAY(wxArrayTreeItemIds);
  49
  50 // ----------------------------------------------------------------------------
  51 // constants
  52 // ----------------------------------------------------------------------------
  53
  54 static const int NO_IMAGE = -1;
  55
  56 #define PIXELS_PER_UNIT 10
  57
  58 // -----------------------------------------------------------------------------
  59 // private classes
  60 // -----------------------------------------------------------------------------
  61
  62 // timer used for enabling in-place edit
  63 class WXDLLEXPORT wxTreeRenameTimer: public wxTimer
  64 {
  65 public:
  66     wxTreeRenameTimer( wxGenericTreeCtrl *owner );
  67
  68     void Notify();
  69
  70 private:
  71     wxGenericTreeCtrl   *m_owner;
  72 };
  73
  74 // control used for in-place edit
  75 class WXDLLEXPORT wxTreeTextCtrl: public wxTextCtrl
  76 {
  77 public:
  78     wxTreeTextCtrl( wxWindow *parent,
  79                     const wxWindowID id,
  80                     bool *accept,
  81                     wxString *res,
  82                     wxGenericTreeCtrl *owner,
  83                     const wxString &value = wxEmptyString,
  84                     const wxPoint &pos = wxDefaultPosition,
  85                     const wxSize &size = wxDefaultSize,
  86                     int style = wxSIMPLE_BORDER,
  87                     const wxValidator& validator = wxDefaultValidator,
  88                     const wxString &name = wxTextCtrlNameStr );
  89
  90     void OnChar( wxKeyEvent &event );
  91     void OnKeyUp( wxKeyEvent &event );
  92     void OnKillFocus( wxFocusEvent &event );
  93
  94 private:
  95     bool               *m_accept;
  96     wxString           *m_res;
  97     wxGenericTreeCtrl  *m_owner;
  98     wxString            m_startValue;
  99     bool                m_finished;
 100
 101     DECLARE_EVENT_TABLE()
 102 };
 103
 104 // a tree item
 105 class WXDLLEXPORT wxGenericTreeItem
 106 {
 107 public:
 108     // ctors & dtor
 109     wxGenericTreeItem() { m_data = NULL; }
 110     wxGenericTreeItem( wxGenericTreeItem *parent,
 111                        const wxString& text,
 112                        int image,
 113                        int selImage,
 114                        wxTreeItemData *data );
 115
 116     ~wxGenericTreeItem();
 117
 118     // trivial accessors
 119     wxArrayGenericTreeItems& GetChildren() { return m_children; }
 120
 121     const wxString& GetText() const { return m_text; }
 122     int GetImage(wxTreeItemIcon which = wxTreeItemIcon_Normal) const
 123         { return m_images[which]; }
 124     wxTreeItemData *GetData() const { return m_data; }
 125
 126     // returns the current image for the item (depending on its
 127     // selected/expanded/whatever state)
 128     int GetCurrentImage() const;
 129
 130     void SetText( const wxString &text );
 131     void SetImage(int image, wxTreeItemIcon which) { m_images[which] = image; }
 132     void SetData(wxTreeItemData *data) { m_data = data; }
 133
 134     void SetHasPlus(bool has = TRUE) { m_hasPlus = has; }
 135
 136     void SetBold(bool bold) { m_isBold = bold; }
 137
 138     int GetX() const { return m_x; }
 139     int GetY() const { return m_y; }
 140
 141     void SetX(int x) { m_x = x; }
 142     void SetY(int y) { m_y = y; }
 143
 144     int  GetHeight() const { return m_height; }
 145     int  GetWidth()  const { return m_width; }
 146
 147     void SetHeight(int h) { m_height = h; }
 148     void SetWidth(int w) { m_width = w; }
 149
 150     wxGenericTreeItem *GetParent() const { return m_parent; }
 151
 152     // operations
 153         // deletes all children notifying the treectrl about it if !NULL
 154         // pointer given
 155     void DeleteChildren(wxGenericTreeCtrl *tree = NULL);
 156
 157     // get count of all children (and grand children if 'recursively')
 158     size_t GetChildrenCount(bool recursively = TRUE) const;
 159
 160     void Insert(wxGenericTreeItem *child, size_t index)
 161     { m_children.Insert(child, index); }
 162
 163     void GetSize( int &x, int &y, const wxGenericTreeCtrl* );
 164
 165         // return the item at given position (or NULL if no item), onButton is
 166         // TRUE if the point belongs to the item's button, otherwise it lies
 167         // on the button's label
 168     wxGenericTreeItem *HitTest( const wxPoint& point,
 169                                 const wxGenericTreeCtrl *,
 170                                 int &flags,
 171                                 int level );
 172
 173     void Expand() { m_isCollapsed = FALSE; }
 174     void Collapse() { m_isCollapsed = TRUE; }
 175
 176     void SetHilight( bool set = TRUE ) { m_hasHilight = set; }
 177
 178     // status inquiries
 179     bool HasChildren() const { return !m_children.IsEmpty(); }
 180     bool IsSelected()  const { return m_hasHilight != 0; }
 181     bool IsExpanded()  const { return !m_isCollapsed; }
 182     bool HasPlus()     const { return m_hasPlus || HasChildren(); }
 183     bool IsBold()      const { return m_isBold != 0; }
 184
 185     // attributes
 186         // get them - may be NULL
 187     wxTreeItemAttr *GetAttributes() const { return m_attr; }
 188         // get them ensuring that the pointer is not NULL
 189     wxTreeItemAttr& Attr()
 190     {
 191         if ( !m_attr )
 192         {
 193             m_attr = new wxTreeItemAttr;
 194             m_ownsAttr = TRUE;
 195         }
 196         return *m_attr;
 197     }
 198         // set them
 199     void SetAttributes(wxTreeItemAttr *attr)
 200     {
 201         if ( m_ownsAttr ) delete m_attr;
 202         m_attr = attr;
 203         m_ownsAttr = FALSE;
 204     }
 205         // set them and delete when done
 206     void AssignAttributes(wxTreeItemAttr *attr)
 207     {
 208         SetAttributes(attr);
 209         m_ownsAttr = TRUE;
 210     }
 211
 212 private:
 213     // since there can be very many of these, we save size by chosing
 214     // the smallest representation for the elements and by ordering
 215     // the members to avoid padding.
 216     wxString            m_text;         // label to be rendered for item
 217
 218     wxTreeItemData     *m_data;         // user-provided data
 219
 220     wxArrayGenericTreeItems m_children; // list of children
 221     wxGenericTreeItem  *m_parent;       // parent of this item
 222
 223     wxTreeItemAttr     *m_attr;         // attributes???
 224
 225     // tree ctrl images for the normal, selected, expanded and
 226     // expanded+selected states
 227     short               m_images[wxTreeItemIcon_Max];
 228
 229     wxCoord             m_x;            // (virtual) offset from top
 230     short               m_y;            // (virtual) offset from left
 231     short               m_width;        // width of this item
 232     unsigned char       m_height;       // height of this item
 233
 234     // use bitfields to save size
 235     int                 m_isCollapsed :1;
 236     int                 m_hasHilight  :1; // same as focused
 237     int                 m_hasPlus     :1; // used for item which doesn't have
 238                                           // children but has a [+] button
 239     int                 m_isBold      :1; // render the label in bold font
 240     int                 m_ownsAttr    :1; // delete attribute when done
 241 };
 242
 243 // =============================================================================
 244 // implementation
 245 // =============================================================================
 246
 247 // ----------------------------------------------------------------------------
 248 // private functions
 249 // ----------------------------------------------------------------------------
 250
 251 // translate the key or mouse event flags to the type of selection we're
 252 // dealing with
 253 static void EventFlagsToSelType(long style,
 254                                 bool shiftDown,
 255                                 bool ctrlDown,
 256                                 bool &is_multiple,
 257                                 bool &extended_select,
 258                                 bool &unselect_others)
 259 {
 260     is_multiple = (style & wxTR_MULTIPLE) != 0;
 261     extended_select = shiftDown && is_multiple;
 262     unselect_others = !(extended_select || (ctrlDown && is_multiple));
 263 }
 264
 265 // -----------------------------------------------------------------------------
 266 // wxTreeRenameTimer (internal)
 267 // -----------------------------------------------------------------------------
 268
 269 wxTreeRenameTimer::wxTreeRenameTimer( wxGenericTreeCtrl *owner )
 270 {
 271     m_owner = owner;
 272 }
 273
 274 void wxTreeRenameTimer::Notify()
 275 {
 276     m_owner->OnRenameTimer();
 277 }
 278
 279 //-----------------------------------------------------------------------------
 280 // wxTreeTextCtrl (internal)
 281 //-----------------------------------------------------------------------------
 282
 283 BEGIN_EVENT_TABLE(wxTreeTextCtrl,wxTextCtrl)
 284     EVT_CHAR           (wxTreeTextCtrl::OnChar)
 285     EVT_KEY_UP         (wxTreeTextCtrl::OnKeyUp)
 286     EVT_KILL_FOCUS     (wxTreeTextCtrl::OnKillFocus)
 287 END_EVENT_TABLE()
 288
 289 wxTreeTextCtrl::wxTreeTextCtrl( wxWindow *parent,
 290                                 const wxWindowID id,
 291                                 bool *accept,
 292                                 wxString *res,
 293                                 wxGenericTreeCtrl *owner,
 294                                 const wxString &value,
 295                                 const wxPoint &pos,
 296                                 const wxSize &size,
 297                                 int style,
 298                                 const wxValidator& validator,
 299                                 const wxString &name )
 300     : wxTextCtrl( parent, id, value, pos, size, style, validator, name )
 301 {
 302     m_res = res;
 303     m_accept = accept;
 304     m_owner = owner;
 305     (*m_accept) = FALSE;
 306     (*m_res) = wxEmptyString;
 307     m_startValue = value;
 308     m_finished = FALSE;
 309 }
 310
 311 void wxTreeTextCtrl::OnChar( wxKeyEvent &event )
 312 {
 313     if (event.m_keyCode == WXK_RETURN)
 314     {
 315         (*m_accept) = TRUE;
 316         (*m_res) = GetValue();
 317
 318         if ((*m_res) != m_startValue)
 319             m_owner->OnRenameAccept();
 320
 321         if (!wxPendingDelete.Member(this))
 322             wxPendingDelete.Append(this);
 323
 324         m_finished = TRUE;
 325         m_owner->SetFocus(); // This doesn't work. TODO.
 326
 327         return;
 328     }
 329     if (event.m_keyCode == WXK_ESCAPE)
 330     {
 331         (*m_accept) = FALSE;
 332         (*m_res) = "";
 333
 334         if (!wxPendingDelete.Member(this))
 335             wxPendingDelete.Append(this);
 336
 337         m_finished = TRUE;
 338         m_owner->SetFocus(); // This doesn't work. TODO.
 339
 340         return;
 341     }
 342     event.Skip();
 343 }
 344
 345 void wxTreeTextCtrl::OnKeyUp( wxKeyEvent &event )
 346 {
 347     if (m_finished)
 348     {
 349         event.Skip();
 350         return;
 351     }
 352
 353     // auto-grow the textctrl:
 354     wxSize parentSize = m_owner->GetSize();
 355     wxPoint myPos = GetPosition();
 356     wxSize mySize = GetSize();
 357     int sx, sy;
 358     GetTextExtent(GetValue() + _T("M"), &sx, &sy);
 359     if (myPos.x + sx > parentSize.x) sx = parentSize.x - myPos.x;
 360     if (mySize.x > sx) sx = mySize.x;
 361     SetSize(sx, -1);
 362
 363     event.Skip();
 364 }
 365
 366 void wxTreeTextCtrl::OnKillFocus( wxFocusEvent &event )
 367 {
 368     if (m_finished)
 369     {
 370         event.Skip();
 371         return;
 372     }
 373
 374     if (!wxPendingDelete.Member(this))
 375         wxPendingDelete.Append(this);
 376
 377     (*m_accept) = TRUE;
 378     (*m_res) = GetValue();
 379
 380     if ((*m_res) != m_startValue)
 381         m_owner->OnRenameAccept();
 382 }
 383
 384 // -----------------------------------------------------------------------------
 385 // wxGenericTreeItem
 386 // -----------------------------------------------------------------------------
 387
 388 wxGenericTreeItem::wxGenericTreeItem(wxGenericTreeItem *parent,
 389                                      const wxString& text,
 390                                      int image, int selImage,
 391                                      wxTreeItemData *data)
 392                  : m_text(text)
 393 {
 394     m_images[wxTreeItemIcon_Normal] = image;
 395     m_images[wxTreeItemIcon_Selected] = selImage;
 396     m_images[wxTreeItemIcon_Expanded] = NO_IMAGE;
 397     m_images[wxTreeItemIcon_SelectedExpanded] = NO_IMAGE;
 398
 399     m_data = data;
 400     m_x = m_y = 0;
 401
 402     m_isCollapsed = TRUE;
 403     m_hasHilight = FALSE;
 404     m_hasPlus = FALSE;
 405     m_isBold = FALSE;
 406
 407     m_parent = parent;
 408
 409     m_attr = (wxTreeItemAttr *)NULL;
 410     m_ownsAttr = FALSE;
 411
 412     // We don't know the height here yet.
 413     m_width = 0;
 414     m_height = 0;
 415 }
 416
 417 wxGenericTreeItem::~wxGenericTreeItem()
 418 {
 419     delete m_data;
 420
 421     if (m_ownsAttr) delete m_attr;
 422
 423     wxASSERT_MSG( m_children.IsEmpty(),
 424                   wxT("please call DeleteChildren() before deleting the item") );
 425 }
 426
 427 void wxGenericTreeItem::DeleteChildren(wxGenericTreeCtrl *tree)
 428 {
 429     size_t count = m_children.Count();
 430     for ( size_t n = 0; n < count; n++ )
 431     {
 432         wxGenericTreeItem *child = m_children[n];
 433         if (tree)
 434             tree->SendDeleteEvent(child);
 435
 436         child->DeleteChildren(tree);
 437         delete child;
 438     }
 439
 440     m_children.Empty();
 441 }
 442
 443 void wxGenericTreeItem::SetText( const wxString &text )
 444 {
 445     m_text = text;
 446 }
 447
 448 size_t wxGenericTreeItem::GetChildrenCount(bool recursively) const
 449 {
 450     size_t count = m_children.Count();
 451     if ( !recursively )
 452         return count;
 453
 454     size_t total = count;
 455     for (size_t n = 0; n < count; ++n)
 456     {
 457         total += m_children[n]->GetChildrenCount();
 458     }
 459
 460     return total;
 461 }
 462
 463 void wxGenericTreeItem::GetSize( int &x, int &y,
 464                                  const wxGenericTreeCtrl *theButton )
 465 {
 466     int bottomY=m_y+theButton->GetLineHeight(this);
 467     if ( y < bottomY ) y = bottomY;
 468     int width = m_x +  m_width;
 469     if ( x < width ) x = width;
 470
 471     if (IsExpanded())
 472     {
 473         size_t count = m_children.Count();
 474         for ( size_t n = 0; n < count; ++n )
 475         {
 476             m_children[n]->GetSize( x, y, theButton );
 477         }
 478     }
 479 }
 480
 481 wxGenericTreeItem *wxGenericTreeItem::HitTest(const wxPoint& point,
 482                                               const wxGenericTreeCtrl *theCtrl,
 483                                               int &flags,
 484                                               int level)
 485 {
 486     // for a hidden root node, don't evaluate it, but do evaluate children
 487     if ( !(level == 0 && theCtrl->HasFlag(wxTR_HIDE_ROOT)) )
 488     {
 489         // evaluate the item
 490         int h = theCtrl->GetLineHeight(this);
 491         if ((point.y > m_y) && (point.y < m_y + h))
 492         {
 493             int y_mid = m_y + h/2;
 494             if (point.y < y_mid )
 495                 flags |= wxTREE_HITTEST_ONITEMUPPERPART;
 496             else
 497                 flags |= wxTREE_HITTEST_ONITEMLOWERPART;
 498
 499             // 5 is the size of the plus sign
 500             int xCross = m_x - theCtrl->GetSpacing();
 501             if ((point.x > xCross-5) && (point.x < xCross+5) &&
 502                 (point.y > y_mid-5) && (point.y < y_mid+5) &&
 503                 HasPlus() && theCtrl->HasButtons() )
 504             {
 505                 flags |= wxTREE_HITTEST_ONITEMBUTTON;
 506                 return this;
 507             }
 508
 509             if ((point.x >= m_x) && (point.x <= m_x+m_width))
 510             {
 511                 int image_w = -1;
 512                 int image_h;
 513
 514                 // assuming every image (normal and selected) has the same size!
 515                 if ( (GetImage() != NO_IMAGE) && theCtrl->m_imageListNormal )
 516                     theCtrl->m_imageListNormal->GetSize(GetImage(),
 517                                                         image_w, image_h);
 518
 519                 if ((image_w != -1) && (point.x <= m_x + image_w + 1))
 520                     flags |= wxTREE_HITTEST_ONITEMICON;
 521                 else
 522                     flags |= wxTREE_HITTEST_ONITEMLABEL;
 523
 524                 return this;
 525             }
 526
 527             if (point.x < m_x)
 528                 flags |= wxTREE_HITTEST_ONITEMINDENT;
 529             if (point.x > m_x+m_width)
 530                 flags |= wxTREE_HITTEST_ONITEMRIGHT;
 531
 532             return this;
 533         }
 534
 535         // if children are expanded, fall through to evaluate them
 536         if (m_isCollapsed) return (wxGenericTreeItem*) NULL;
 537     }
 538
 539     // evaluate children
 540     size_t count = m_children.Count();
 541     for ( size_t n = 0; n < count; n++ )
 542     {
 543         wxGenericTreeItem *res = m_children[n]->HitTest( point,
 544                                                          theCtrl,
 545                                                          flags,
 546                                                          level + 1 );
 547         if ( res != NULL )
 548             return res;
 549     }
 550
 551     return (wxGenericTreeItem*) NULL;
 552 }
 553
 554 int wxGenericTreeItem::GetCurrentImage() const
 555 {
 556     int image = NO_IMAGE;
 557     if ( IsExpanded() )
 558     {
 559         if ( IsSelected() )
 560         {
 561             image = GetImage(wxTreeItemIcon_SelectedExpanded);
 562         }
 563
 564         if ( image == NO_IMAGE )
 565         {
 566             // we usually fall back to the normal item, but try just the
 567             // expanded one (and not selected) first in this case
 568             image = GetImage(wxTreeItemIcon_Expanded);
 569         }
 570     }
 571     else // not expanded
 572     {
 573         if ( IsSelected() )
 574             image = GetImage(wxTreeItemIcon_Selected);
 575     }
 576
 577     // maybe it doesn't have the specific image we want,
 578     // try the default one instead
 579     if ( image == NO_IMAGE ) image = GetImage();
 580
 581     return image;
 582 }
 583
 584 // -----------------------------------------------------------------------------
 585 // wxGenericTreeCtrl implementation
 586 // -----------------------------------------------------------------------------
 587
 588 IMPLEMENT_DYNAMIC_CLASS(wxGenericTreeCtrl, wxScrolledWindow)
 589
 590 BEGIN_EVENT_TABLE(wxGenericTreeCtrl,wxScrolledWindow)
 591     EVT_PAINT          (wxGenericTreeCtrl::OnPaint)
 592     EVT_MOUSE_EVENTS   (wxGenericTreeCtrl::OnMouse)
 593     EVT_CHAR           (wxGenericTreeCtrl::OnChar)
 594     EVT_SET_FOCUS      (wxGenericTreeCtrl::OnSetFocus)
 595     EVT_KILL_FOCUS     (wxGenericTreeCtrl::OnKillFocus)
 596     EVT_IDLE           (wxGenericTreeCtrl::OnIdle)
 597 END_EVENT_TABLE()
 598
 599 #if !defined(__WXMSW__) || defined(__WIN16__) || defined(__WXUNIVERSAL__)
 600 /*
 601  * wxTreeCtrl has to be a real class or we have problems with
 602  * the run-time information.
 603  */
 604
 605 IMPLEMENT_DYNAMIC_CLASS(wxTreeCtrl, wxGenericTreeCtrl)
 606 #endif
 607
 608 // -----------------------------------------------------------------------------
 609 // construction/destruction
 610 // -----------------------------------------------------------------------------
 611
 612 void wxGenericTreeCtrl::Init()
 613 {
 614     m_current = m_key_current = m_anchor = (wxGenericTreeItem *) NULL;
 615     m_hasFocus = FALSE;
 616     m_dirty = FALSE;
 617
 618     m_lineHeight = 10;
 619     m_indent = 15;
 620     m_spacing = 18;
 621
 622     m_hilightBrush = new wxBrush
 623                          (
 624                             wxSystemSettings::GetSystemColour
 625                             (
 626                                 wxSYS_COLOUR_HIGHLIGHT
 627                             ),
 628                             wxSOLID
 629                          );
 630
 631     m_hilightUnfocusedBrush = new wxBrush
 632                               (
 633                                  wxSystemSettings::GetSystemColour
 634                                  (
 635                                      wxSYS_COLOUR_BTNSHADOW
 636                                  ),
 637                                  wxSOLID
 638                               );
 639
 640     m_imageListNormal = m_imageListButtons =
 641     m_imageListState = (wxImageList *) NULL;
 642     m_ownsImageListNormal = m_ownsImageListButtons =
 643     m_ownsImageListState = FALSE;
 644
 645     m_dragCount = 0;
 646     m_isDragging = FALSE;
 647     m_dropTarget = m_oldSelection = (wxGenericTreeItem *)NULL;
 648
 649     m_renameTimer = new wxTreeRenameTimer( this );
 650     m_lastOnSame = FALSE;
 651
 652     m_normalFont = wxSystemSettings::GetSystemFont( wxSYS_DEFAULT_GUI_FONT );
 653     m_boldFont = wxFont( m_normalFont.GetPointSize(),
 654                          m_normalFont.GetFamily(),
 655                          m_normalFont.GetStyle(),
 656                          wxBOLD,
 657                          m_normalFont.GetUnderlined());
 658 }
 659
 660 bool wxGenericTreeCtrl::Create(wxWindow *parent,
 661                                wxWindowID id,
 662                                const wxPoint& pos,
 663                                const wxSize& size,
 664                                long style,
 665                                const wxValidator &validator,
 666                                const wxString& name )
 667 {
 668 #ifdef __WXMAC__
 669     int major,minor;
 670     wxGetOsVersion( &major, &minor );
 671
 672     if (style & wxTR_HAS_BUTTONS) style |= wxTR_MAC_BUTTONS;
 673     style &= ~wxTR_LINES_AT_ROOT;
 674     style |= wxTR_NO_LINES;
 675     if (major < 10)
 676         style |= wxTR_ROW_LINES;
 677 #endif
 678
 679     wxScrolledWindow::Create( parent, id, pos, size,
 680                               style|wxHSCROLL|wxVSCROLL, name );
 681
 682         // If the tree display has no buttons, but does have
 683         // connecting lines, we can use a narrower layout.
 684         // It may not be a good idea to force this...
 685     if (!HasButtons() && !HasFlag(wxTR_NO_LINES))
 686     {
 687         m_indent= 10;
 688         m_spacing = 10;
 689     }
 690
 691 #if wxUSE_VALIDATORS
 692     SetValidator( validator );
 693 #endif
 694
 695     SetBackgroundColour( wxSystemSettings::GetSystemColour( wxSYS_COLOUR_LISTBOX ) );
 696
 697 //  m_dottedPen = wxPen( "grey", 0, wxDOT );  too slow under XFree86
 698     m_dottedPen = wxPen( wxT("grey"), 0, 0 );
 699
 700     return TRUE;
 701 }
 702
 703 wxGenericTreeCtrl::~wxGenericTreeCtrl()
 704 {
 705     delete m_hilightBrush;
 706     delete m_hilightUnfocusedBrush;
 707
 708     DeleteAllItems();
 709
 710     delete m_renameTimer;
 711     if (m_ownsImageListNormal) delete m_imageListNormal;
 712     if (m_ownsImageListState) delete m_imageListState;
 713     if (m_ownsImageListButtons) delete m_imageListButtons;
 714 }
 715
 716 // -----------------------------------------------------------------------------
 717 // accessors
 718 // -----------------------------------------------------------------------------
 719
 720 size_t wxGenericTreeCtrl::GetCount() const
 721 {
 722     return m_anchor == NULL ? 0u : m_anchor->GetChildrenCount();
 723 }
 724
 725 void wxGenericTreeCtrl::SetIndent(unsigned int indent)
 726 {
 727     m_indent = indent;
 728     m_dirty = TRUE;
 729 }
 730
 731 void wxGenericTreeCtrl::SetSpacing(unsigned int spacing)
 732 {
 733     m_spacing = spacing;
 734     m_dirty = TRUE;
 735 }
 736
 737 size_t wxGenericTreeCtrl::GetChildrenCount(const wxTreeItemId& item, bool recursively)
 738 {
 739     wxCHECK_MSG( item.IsOk(), 0u, wxT("invalid tree item") );
 740
 741     return ((wxGenericTreeItem*) item.m_pItem)->GetChildrenCount(recursively);
 742 }
 743
 744 void wxGenericTreeCtrl::SetWindowStyle(const long styles)
 745 {
 746         // right now, just sets the styles.  Eventually, we may
 747         // want to update the inherited styles, but right now
 748         // none of the parents has updatable styles
 749     m_windowStyle = styles;
 750     m_dirty = TRUE;
 751 }
 752
 753 // -----------------------------------------------------------------------------
 754 // functions to work with tree items
 755 // -----------------------------------------------------------------------------
 756
 757 wxString wxGenericTreeCtrl::GetItemText(const wxTreeItemId& item) const
 758 {
 759     wxCHECK_MSG( item.IsOk(), wxT(""), wxT("invalid tree item") );
 760
 761     return ((wxGenericTreeItem*) item.m_pItem)->GetText();
 762 }
 763
 764 int wxGenericTreeCtrl::GetItemImage(const wxTreeItemId& item,
 765                              wxTreeItemIcon which) const
 766 {
 767     wxCHECK_MSG( item.IsOk(), -1, wxT("invalid tree item") );
 768
 769     return ((wxGenericTreeItem*) item.m_pItem)->GetImage(which);
 770 }
 771
 772 wxTreeItemData *wxGenericTreeCtrl::GetItemData(const wxTreeItemId& item) const
 773 {
 774     wxCHECK_MSG( item.IsOk(), NULL, wxT("invalid tree item") );
 775
 776     return ((wxGenericTreeItem*) item.m_pItem)->GetData();
 777 }
 778
 779 void wxGenericTreeCtrl::SetItemText(const wxTreeItemId& item, const wxString& text)
 780 {
 781     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 782
 783     wxClientDC dc(this);
 784     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 785     pItem->SetText(text);
 786     CalculateSize(pItem, dc);
 787     RefreshLine(pItem);
 788 }
 789
 790 void wxGenericTreeCtrl::SetItemImage(const wxTreeItemId& item,
 791                               int image,
 792                               wxTreeItemIcon which)
 793 {
 794     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 795
 796     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 797     pItem->SetImage(image, which);
 798
 799     wxClientDC dc(this);
 800     CalculateSize(pItem, dc);
 801     RefreshLine(pItem);
 802 }
 803
 804 void wxGenericTreeCtrl::SetItemData(const wxTreeItemId& item, wxTreeItemData *data)
 805 {
 806     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 807
 808     ((wxGenericTreeItem*) item.m_pItem)->SetData(data);
 809 }
 810
 811 void wxGenericTreeCtrl::SetItemHasChildren(const wxTreeItemId& item, bool has)
 812 {
 813     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 814
 815     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 816     pItem->SetHasPlus(has);
 817     RefreshLine(pItem);
 818 }
 819
 820 void wxGenericTreeCtrl::SetItemBold(const wxTreeItemId& item, bool bold)
 821 {
 822     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 823
 824     // avoid redrawing the tree if no real change
 825     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 826     if ( pItem->IsBold() != bold )
 827     {
 828         pItem->SetBold(bold);
 829         RefreshLine(pItem);
 830     }
 831 }
 832
 833 void wxGenericTreeCtrl::SetItemTextColour(const wxTreeItemId& item,
 834                                    const wxColour& col)
 835 {
 836     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 837
 838     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 839     pItem->Attr().SetTextColour(col);
 840     RefreshLine(pItem);
 841 }
 842
 843 void wxGenericTreeCtrl::SetItemBackgroundColour(const wxTreeItemId& item,
 844                                          const wxColour& col)
 845 {
 846     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 847
 848     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 849     pItem->Attr().SetBackgroundColour(col);
 850     RefreshLine(pItem);
 851 }
 852
 853 void wxGenericTreeCtrl::SetItemFont(const wxTreeItemId& item, const wxFont& font)
 854 {
 855     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 856
 857     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 858     pItem->Attr().SetFont(font);
 859     RefreshLine(pItem);
 860 }
 861
 862 bool wxGenericTreeCtrl::SetFont( const wxFont &font )
 863 {
 864     wxScrolledWindow::SetFont(font);
 865
 866     m_normalFont = font ;
 867     m_boldFont = wxFont( m_normalFont.GetPointSize(),
 868                             m_normalFont.GetFamily(),
 869                             m_normalFont.GetStyle(),
 870                             wxBOLD,
 871                             m_normalFont.GetUnderlined());
 872
 873     return TRUE;
 874 }
 875
 876
 877 // -----------------------------------------------------------------------------
 878 // item status inquiries
 879 // -----------------------------------------------------------------------------
 880
 881 bool wxGenericTreeCtrl::IsVisible(const wxTreeItemId& item) const
 882 {
 883     wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
 884
 885     // An item is only visible if it's not a descendant of a collapsed item
 886     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 887     wxGenericTreeItem* parent = pItem->GetParent();
 888     while (parent)
 889     {
 890         if (!parent->IsExpanded())
 891             return FALSE;
 892         parent = parent->GetParent();
 893     }
 894
 895     int startX, startY;
 896     GetViewStart(& startX, & startY);
 897
 898     wxSize clientSize = GetClientSize();
 899
 900     wxRect rect;
 901     if (!GetBoundingRect(item, rect))
 902         return FALSE;
 903     if (rect.GetWidth() == 0 || rect.GetHeight() == 0)
 904         return FALSE;
 905     if (rect.GetBottom() < 0 || rect.GetTop() > clientSize.y)
 906         return FALSE;
 907     if (rect.GetRight() < 0 || rect.GetLeft() > clientSize.x)
 908         return FALSE;
 909
 910     return TRUE;
 911 }
 912
 913 bool wxGenericTreeCtrl::ItemHasChildren(const wxTreeItemId& item) const
 914 {
 915     wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
 916
 917     // consider that the item does have children if it has the "+" button: it
 918     // might not have them (if it had never been expanded yet) but then it
 919     // could have them as well and it's better to err on this side rather than
 920     // disabling some operations which are restricted to the items with
 921     // children for an item which does have them
 922     return ((wxGenericTreeItem*) item.m_pItem)->HasPlus();
 923 }
 924
 925 bool wxGenericTreeCtrl::IsExpanded(const wxTreeItemId& item) const
 926 {
 927     wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
 928
 929     return ((wxGenericTreeItem*) item.m_pItem)->IsExpanded();
 930 }
 931
 932 bool wxGenericTreeCtrl::IsSelected(const wxTreeItemId& item) const
 933 {
 934     wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
 935
 936     return ((wxGenericTreeItem*) item.m_pItem)->IsSelected();
 937 }
 938
 939 bool wxGenericTreeCtrl::IsBold(const wxTreeItemId& item) const
 940 {
 941     wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
 942
 943     return ((wxGenericTreeItem*) item.m_pItem)->IsBold();
 944 }
 945
 946 // -----------------------------------------------------------------------------
 947 // navigation
 948 // -----------------------------------------------------------------------------
 949
 950 wxTreeItemId wxGenericTreeCtrl::GetParent(const wxTreeItemId& item) const
 951 {
 952     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 953
 954     return ((wxGenericTreeItem*) item.m_pItem)->GetParent();
 955 }
 956
 957 wxTreeItemId wxGenericTreeCtrl::GetFirstChild(const wxTreeItemId& item, long& cookie) const
 958 {
 959     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 960
 961     cookie = 0;
 962     return GetNextChild(item, cookie);
 963 }
 964
 965 wxTreeItemId wxGenericTreeCtrl::GetNextChild(const wxTreeItemId& item, long& cookie) const
 966 {
 967     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 968
 969     wxArrayGenericTreeItems& children = ((wxGenericTreeItem*) item.m_pItem)->GetChildren();
 970     if ( (size_t)cookie < children.Count() )
 971     {
 972         return children.Item((size_t)cookie++);
 973     }
 974     else
 975     {
 976         // there are no more of them
 977         return wxTreeItemId();
 978     }
 979 }
 980
 981 wxTreeItemId wxGenericTreeCtrl::GetLastChild(const wxTreeItemId& item) const
 982 {
 983     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 984
 985     wxArrayGenericTreeItems& children = ((wxGenericTreeItem*) item.m_pItem)->GetChildren();
 986     return (children.IsEmpty() ? wxTreeItemId() : wxTreeItemId(children.Last()));
 987 }
 988
 989 wxTreeItemId wxGenericTreeCtrl::GetNextSibling(const wxTreeItemId& item) const
 990 {
 991     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 992
 993     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
 994     wxGenericTreeItem *parent = i->GetParent();
 995     if ( parent == NULL )
 996     {
 997         // root item doesn't have any siblings
 998         return wxTreeItemId();
 999     }
1000
1001     wxArrayGenericTreeItems& siblings = parent->GetChildren();
1002     int index = siblings.Index(i);
1003     wxASSERT( index != wxNOT_FOUND ); // I'm not a child of my parent?
1004
1005     size_t n = (size_t)(index + 1);
1006     return n == siblings.Count() ? wxTreeItemId() : wxTreeItemId(siblings[n]);
1007 }
1008
1009 wxTreeItemId wxGenericTreeCtrl::GetPrevSibling(const wxTreeItemId& item) const
1010 {
1011     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
1012
1013     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
1014     wxGenericTreeItem *parent = i->GetParent();
1015     if ( parent == NULL )
1016     {
1017         // root item doesn't have any siblings
1018         return wxTreeItemId();
1019     }
1020
1021     wxArrayGenericTreeItems& siblings = parent->GetChildren();
1022     int index = siblings.Index(i);
1023     wxASSERT( index != wxNOT_FOUND ); // I'm not a child of my parent?
1024
1025     return index == 0 ? wxTreeItemId()
1026                       : wxTreeItemId(siblings[(size_t)(index - 1)]);
1027 }
1028
1029 // Only for internal use right now, but should probably be public
1030 wxTreeItemId wxGenericTreeCtrl::GetNext(const wxTreeItemId& item) const
1031 {
1032     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
1033
1034     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
1035
1036     // First see if there are any children.
1037     wxArrayGenericTreeItems& children = i->GetChildren();
1038     if (children.GetCount() > 0)
1039     {
1040          return children.Item(0);
1041     }
1042     else
1043     {
1044          // Try a sibling of this or ancestor instead
1045          wxTreeItemId p = item;
1046          wxTreeItemId toFind;
1047          do
1048          {
1049               toFind = GetNextSibling(p);
1050               p = GetParent(p);
1051          } while (p.IsOk() && !toFind.IsOk());
1052          return toFind;
1053     }
1054 }
1055
1056 wxTreeItemId wxGenericTreeCtrl::GetFirstVisibleItem() const
1057 {
1058     wxTreeItemId id = GetRootItem();
1059     if (!id.IsOk())
1060         return id;
1061
1062     do
1063     {
1064         if (IsVisible(id))
1065               return id;
1066         id = GetNext(id);
1067     } while (id.IsOk());
1068
1069     return wxTreeItemId();
1070 }
1071
1072 wxTreeItemId wxGenericTreeCtrl::GetNextVisible(const wxTreeItemId& item) const
1073 {
1074     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
1075
1076     wxTreeItemId id = item;
1077     if (id.IsOk())
1078     {
1079         while (id = GetNext(id), id.IsOk())
1080         {
1081             if (IsVisible(id))
1082                 return id;
1083         }
1084     }
1085     return wxTreeItemId();
1086 }
1087
1088 wxTreeItemId wxGenericTreeCtrl::GetPrevVisible(const wxTreeItemId& item) const
1089 {
1090     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
1091
1092     wxFAIL_MSG(wxT("not implemented"));
1093
1094     return wxTreeItemId();
1095 }
1096
1097 // -----------------------------------------------------------------------------
1098 // operations
1099 // -----------------------------------------------------------------------------
1100
1101 wxTreeItemId wxGenericTreeCtrl::DoInsertItem(const wxTreeItemId& parentId,
1102                                       size_t previous,
1103                                       const wxString& text,
1104                                       int image, int selImage,
1105                                       wxTreeItemData *data)
1106 {
1107     wxGenericTreeItem *parent = (wxGenericTreeItem*) parentId.m_pItem;
1108     if ( !parent )
1109     {
1110         // should we give a warning here?
1111         return AddRoot(text, image, selImage, data);
1112     }
1113
1114     m_dirty = TRUE;     // do this first so stuff below doesn't cause flicker
1115
1116     wxGenericTreeItem *item =
1117         new wxGenericTreeItem( parent, text, image, selImage, data );
1118
1119     if ( data != NULL )
1120     {
1121         data->m_pItem = (long) item;
1122     }
1123
1124     parent->Insert( item, previous );
1125
1126     return item;
1127 }
1128
1129 wxTreeItemId wxGenericTreeCtrl::AddRoot(const wxString& text,
1130                                  int image, int selImage,
1131                                  wxTreeItemData *data)
1132 {
1133     wxCHECK_MSG( !m_anchor, wxTreeItemId(), wxT("tree can have only one root") );
1134
1135     m_dirty = TRUE;     // do this first so stuff below doesn't cause flicker
1136
1137     m_anchor = new wxGenericTreeItem((wxGenericTreeItem *)NULL, text,
1138                                    image, selImage, data);
1139     if (HasFlag(wxTR_HIDE_ROOT))
1140     {
1141         // if root is hidden, make sure we can navigate
1142         // into children
1143         m_anchor->SetHasPlus();
1144         Expand(m_anchor);
1145     }
1146     if ( data != NULL )
1147     {
1148         data->m_pItem = (long) m_anchor;
1149     }
1150
1151     if (!HasFlag(wxTR_MULTIPLE))
1152     {
1153         m_current = m_key_current = m_anchor;
1154         m_current->SetHilight( TRUE );
1155     }
1156
1157     return m_anchor;
1158 }
1159
1160 wxTreeItemId wxGenericTreeCtrl::PrependItem(const wxTreeItemId& parent,
1161                                      const wxString& text,
1162                                      int image, int selImage,
1163                                      wxTreeItemData *data)
1164 {
1165     return DoInsertItem(parent, 0u, text, image, selImage, data);
1166 }
1167
1168 wxTreeItemId wxGenericTreeCtrl::InsertItem(const wxTreeItemId& parentId,
1169                                     const wxTreeItemId& idPrevious,
1170                                     const wxString& text,
1171                                     int image, int selImage,
1172                                     wxTreeItemData *data)
1173 {
1174     wxGenericTreeItem *parent = (wxGenericTreeItem*) parentId.m_pItem;
1175     if ( !parent )
1176     {
1177         // should we give a warning here?
1178         return AddRoot(text, image, selImage, data);
1179     }
1180
1181     int index = parent->GetChildren().Index((wxGenericTreeItem*) idPrevious.m_pItem);
1182     wxASSERT_MSG( index != wxNOT_FOUND,
1183                   wxT("previous item in wxGenericTreeCtrl::InsertItem() is not a sibling") );
1184
1185     return DoInsertItem(parentId, (size_t)++index, text, image, selImage, data);
1186 }
1187
1188 wxTreeItemId wxGenericTreeCtrl::InsertItem(const wxTreeItemId& parentId,
1189                                     size_t before,
1190                                     const wxString& text,
1191                                     int image, int selImage,
1192                                     wxTreeItemData *data)
1193 {
1194     wxGenericTreeItem *parent = (wxGenericTreeItem*) parentId.m_pItem;
1195     if ( !parent )
1196     {
1197         // should we give a warning here?
1198         return AddRoot(text, image, selImage, data);
1199     }
1200
1201     return DoInsertItem(parentId, before, text, image, selImage, data);
1202 }
1203
1204 wxTreeItemId wxGenericTreeCtrl::AppendItem(const wxTreeItemId& parentId,
1205                                     const wxString& text,
1206                                     int image, int selImage,
1207                                     wxTreeItemData *data)
1208 {
1209     wxGenericTreeItem *parent = (wxGenericTreeItem*) parentId.m_pItem;
1210     if ( !parent )
1211     {
1212         // should we give a warning here?
1213         return AddRoot(text, image, selImage, data);
1214     }
1215
1216     return DoInsertItem( parent, parent->GetChildren().Count(), text,
1217                          image, selImage, data);
1218 }
1219
1220 void wxGenericTreeCtrl::SendDeleteEvent(wxGenericTreeItem *item)
1221 {
1222     wxTreeEvent event( wxEVT_COMMAND_TREE_DELETE_ITEM, GetId() );
1223     event.m_item = (long) item;
1224     event.SetEventObject( this );
1225     ProcessEvent( event );
1226 }
1227
1228 void wxGenericTreeCtrl::DeleteChildren(const wxTreeItemId& itemId)
1229 {
1230     m_dirty = TRUE;     // do this first so stuff below doesn't cause flicker
1231
1232     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1233     item->DeleteChildren(this);
1234 }
1235
1236 void wxGenericTreeCtrl::Delete(const wxTreeItemId& itemId)
1237 {
1238     m_dirty = TRUE;     // do this first so stuff below doesn't cause flicker
1239
1240     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1241
1242     // don't stay with invalid m_key_current or we will crash in
1243     // the next call to OnChar()
1244     bool changeKeyCurrent = FALSE;
1245     wxGenericTreeItem *itemKey = m_key_current;
1246     while ( itemKey )
1247     {
1248         if ( itemKey == item )
1249         {
1250             // m_key_current is a descendant of the item being deleted
1251             changeKeyCurrent = TRUE;
1252             break;
1253         }
1254         itemKey = itemKey->GetParent();
1255     }
1256
1257     wxGenericTreeItem *parent = item->GetParent();
1258     if ( parent )
1259     {
1260         parent->GetChildren().Remove( item );  // remove by value
1261     }
1262
1263     if ( changeKeyCurrent )
1264     {
1265         // may be NULL or not
1266         m_key_current = parent;
1267     }
1268
1269     item->DeleteChildren(this);
1270     SendDeleteEvent(item);
1271     delete item;
1272 }
1273
1274 void wxGenericTreeCtrl::DeleteAllItems()
1275 {
1276     if ( m_anchor )
1277     {
1278         m_dirty = TRUE;
1279
1280         m_anchor->DeleteChildren(this);
1281         delete m_anchor;
1282
1283         m_anchor = NULL;
1284     }
1285 }
1286
1287 void wxGenericTreeCtrl::Expand(const wxTreeItemId& itemId)
1288 {
1289     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1290
1291     wxCHECK_RET( item, _T("invalid item in wxGenericTreeCtrl::Expand") );
1292
1293     if ( !item->HasPlus() )
1294         return;
1295
1296     if ( item->IsExpanded() )
1297         return;
1298
1299     wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_EXPANDING, GetId() );
1300     event.m_item = (long) item;
1301     event.SetEventObject( this );
1302
1303     if ( ProcessEvent( event ) && !event.IsAllowed() )
1304     {
1305         // cancelled by program
1306         return;
1307     }
1308
1309     item->Expand();
1310     CalculatePositions();
1311
1312     RefreshSubtree(item);
1313
1314     event.SetEventType(wxEVT_COMMAND_TREE_ITEM_EXPANDED);
1315     ProcessEvent( event );
1316 }
1317
1318 void wxGenericTreeCtrl::ExpandAll(const wxTreeItemId& item)
1319 {
1320     Expand(item);
1321     if ( IsExpanded(item) )
1322     {
1323         long cookie;
1324         wxTreeItemId child = GetFirstChild(item, cookie);
1325         while ( child.IsOk() )
1326         {
1327             ExpandAll(child);
1328
1329             child = GetNextChild(item, cookie);
1330         }
1331     }
1332 }
1333
1334 void wxGenericTreeCtrl::Collapse(const wxTreeItemId& itemId)
1335 {
1336     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1337
1338     if ( !item->IsExpanded() )
1339         return;
1340
1341     wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_COLLAPSING, GetId() );
1342     event.m_item = (long) item;
1343     event.SetEventObject( this );
1344     if ( ProcessEvent( event ) && !event.IsAllowed() )
1345     {
1346         // cancelled by program
1347         return;
1348     }
1349
1350     item->Collapse();
1351
1352 #if 0  // TODO why should items be collapsed recursively?
1353     wxArrayGenericTreeItems& children = item->GetChildren();
1354     size_t count = children.Count();
1355     for ( size_t n = 0; n < count; n++ )
1356     {
1357         Collapse(children[n]);
1358     }
1359 #endif
1360
1361     CalculatePositions();
1362
1363     RefreshSubtree(item);
1364
1365     event.SetEventType(wxEVT_COMMAND_TREE_ITEM_COLLAPSED);
1366     ProcessEvent( event );
1367 }
1368
1369 void wxGenericTreeCtrl::CollapseAndReset(const wxTreeItemId& item)
1370 {
1371     Collapse(item);
1372     DeleteChildren(item);
1373 }
1374
1375 void wxGenericTreeCtrl::Toggle(const wxTreeItemId& itemId)
1376 {
1377     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1378
1379     if (item->IsExpanded())
1380         Collapse(itemId);
1381     else
1382         Expand(itemId);
1383 }
1384
1385 void wxGenericTreeCtrl::Unselect()
1386 {
1387     if (m_current)
1388     {
1389         m_current->SetHilight( FALSE );
1390         RefreshLine( m_current );
1391     }
1392 }
1393
1394 void wxGenericTreeCtrl::UnselectAllChildren(wxGenericTreeItem *item)
1395 {
1396     if (item->IsSelected())
1397     {
1398         item->SetHilight(FALSE);
1399         RefreshLine(item);
1400     }
1401
1402     if (item->HasChildren())
1403     {
1404         wxArrayGenericTreeItems& children = item->GetChildren();
1405         size_t count = children.Count();
1406         for ( size_t n = 0; n < count; ++n )
1407         {
1408             UnselectAllChildren(children[n]);
1409         }
1410     }
1411 }
1412
1413 void wxGenericTreeCtrl::UnselectAll()
1414 {
1415     UnselectAllChildren((wxGenericTreeItem*) GetRootItem().m_pItem);
1416 }
1417
1418 // Recursive function !
1419 // To stop we must have crt_item<last_item
1420 // Algorithm :
1421 // Tag all next children, when no more children,
1422 // Move to parent (not to tag)
1423 // Keep going... if we found last_item, we stop.
1424 bool wxGenericTreeCtrl::TagNextChildren(wxGenericTreeItem *crt_item, wxGenericTreeItem *last_item, bool select)
1425 {
1426     wxGenericTreeItem *parent = crt_item->GetParent();
1427
1428     if (parent == NULL) // This is root item
1429         return TagAllChildrenUntilLast(crt_item, last_item, select);
1430
1431     wxArrayGenericTreeItems& children = parent->GetChildren();
1432     int index = children.Index(crt_item);
1433     wxASSERT( index != wxNOT_FOUND ); // I'm not a child of my parent?
1434
1435     size_t count = children.Count();
1436     for (size_t n=(size_t)(index+1); n<count; ++n)
1437     {
1438         if (TagAllChildrenUntilLast(children[n], last_item, select)) return TRUE;
1439     }
1440
1441     return TagNextChildren(parent, last_item, select);
1442 }
1443
1444 bool wxGenericTreeCtrl::TagAllChildrenUntilLast(wxGenericTreeItem *crt_item, wxGenericTreeItem *last_item, bool select)
1445 {
1446     crt_item->SetHilight(select);
1447     RefreshLine(crt_item);
1448
1449     if (crt_item==last_item)
1450         return TRUE;
1451
1452     if (crt_item->HasChildren())
1453     {
1454         wxArrayGenericTreeItems& children = crt_item->GetChildren();
1455         size_t count = children.Count();
1456         for ( size_t n = 0; n < count; ++n )
1457         {
1458             if (TagAllChildrenUntilLast(children[n], last_item, select))
1459                 return TRUE;
1460         }
1461     }
1462
1463   return FALSE;
1464 }
1465
1466 void wxGenericTreeCtrl::SelectItemRange(wxGenericTreeItem *item1, wxGenericTreeItem *item2)
1467 {
1468     // item2 is not necessary after item1
1469     wxGenericTreeItem *first=NULL, *last=NULL;
1470
1471     // choice first' and 'last' between item1 and item2
1472     if (item1->GetY()<item2->GetY())
1473     {
1474         first=item1;
1475         last=item2;
1476     }
1477     else
1478     {
1479         first=item2;
1480         last=item1;
1481     }
1482
1483     bool select = m_current->IsSelected();
1484
1485     if ( TagAllChildrenUntilLast(first,last,select) )
1486         return;
1487
1488     TagNextChildren(first,last,select);
1489 }
1490
1491 void wxGenericTreeCtrl::SelectItem(const wxTreeItemId& itemId,
1492                             bool unselect_others,
1493                             bool extended_select)
1494 {
1495     wxCHECK_RET( itemId.IsOk(), wxT("invalid tree item") );
1496
1497     bool is_single=!(GetWindowStyleFlag() & wxTR_MULTIPLE);
1498     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1499
1500     //wxCHECK_RET( ( (!unselect_others) && is_single),
1501     //           wxT("this is a single selection tree") );
1502
1503     // to keep going anyhow !!!
1504     if (is_single)
1505     {
1506         if (item->IsSelected())
1507             return; // nothing to do
1508         unselect_others = TRUE;
1509         extended_select = FALSE;
1510     }
1511     else if ( unselect_others && item->IsSelected() )
1512     {
1513         // selection change if there is more than one item currently selected
1514         wxArrayTreeItemIds selected_items;
1515         if ( GetSelections(selected_items) == 1 )
1516             return;
1517     }
1518
1519     wxTreeEvent event( wxEVT_COMMAND_TREE_SEL_CHANGING, GetId() );
1520     event.m_item = (long) item;
1521     event.m_itemOld = (long) m_current;
1522     event.SetEventObject( this );
1523     // TODO : Here we don't send any selection mode yet !
1524
1525     if ( GetEventHandler()->ProcessEvent( event ) && !event.IsAllowed() )
1526         return;
1527
1528     wxTreeItemId parent = GetParent( itemId );
1529     while (parent.IsOk())
1530     {
1531         if (!IsExpanded(parent))
1532             Expand( parent );
1533
1534         parent = GetParent( parent );
1535     }
1536
1537     EnsureVisible( itemId );
1538
1539     // ctrl press
1540     if (unselect_others)
1541     {
1542         if (is_single) Unselect(); // to speed up thing
1543         else UnselectAll();
1544     }
1545
1546     // shift press
1547     if (extended_select)
1548     {
1549         if ( !m_current )
1550         {
1551             m_current = m_key_current = (wxGenericTreeItem*) GetRootItem().m_pItem;
1552         }
1553
1554         // don't change the mark (m_current)
1555         SelectItemRange(m_current, item);
1556     }
1557     else
1558     {
1559         bool select=TRUE; // the default
1560
1561         // Check if we need to toggle hilight (ctrl mode)
1562         if (!unselect_others)
1563             select=!item->IsSelected();
1564
1565         m_current = m_key_current = item;
1566         m_current->SetHilight(select);
1567         RefreshLine( m_current );
1568     }
1569
1570     event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGED);
1571     GetEventHandler()->ProcessEvent( event );
1572 }
1573
1574 void wxGenericTreeCtrl::FillArray(wxGenericTreeItem *item,
1575                            wxArrayTreeItemIds &array) const
1576 {
1577     if ( item->IsSelected() )
1578         array.Add(wxTreeItemId(item));
1579
1580     if ( item->HasChildren() )
1581     {
1582         wxArrayGenericTreeItems& children = item->GetChildren();
1583         size_t count = children.GetCount();
1584         for ( size_t n = 0; n < count; ++n )
1585             FillArray(children[n], array);
1586     }
1587 }
1588
1589 size_t wxGenericTreeCtrl::GetSelections(wxArrayTreeItemIds &array) const
1590 {
1591     array.Empty();
1592     wxTreeItemId idRoot = GetRootItem();
1593     if ( idRoot.IsOk() )
1594     {
1595         FillArray((wxGenericTreeItem*) idRoot.m_pItem, array);
1596     }
1597     //else: the tree is empty, so no selections
1598
1599     return array.Count();
1600 }
1601
1602 void wxGenericTreeCtrl::EnsureVisible(const wxTreeItemId& item)
1603 {
1604     if (!item.IsOk()) return;
1605
1606     wxGenericTreeItem *gitem = (wxGenericTreeItem*) item.m_pItem;
1607
1608     // first expand all parent branches
1609     wxGenericTreeItem *parent = gitem->GetParent();
1610     while ( parent )
1611     {
1612         Expand(parent);
1613         parent = parent->GetParent();
1614     }
1615
1616     //if (parent) CalculatePositions();
1617
1618     ScrollTo(item);
1619 }
1620
1621 void wxGenericTreeCtrl::ScrollTo(const wxTreeItemId &item)
1622 {
1623     if (!item.IsOk()) return;
1624
1625     // We have to call this here because the label in
1626     // question might just have been added and no screen
1627     // update taken place.
1628     if (m_dirty) wxYieldIfNeeded();
1629
1630     wxGenericTreeItem *gitem = (wxGenericTreeItem*) item.m_pItem;
1631
1632     // now scroll to the item
1633     int item_y = gitem->GetY();
1634
1635     int start_x = 0;
1636     int start_y = 0;
1637     GetViewStart( &start_x, &start_y );
1638     start_y *= PIXELS_PER_UNIT;
1639
1640     int client_h = 0;
1641     int client_w = 0;
1642     GetClientSize( &client_w, &client_h );
1643
1644     if (item_y < start_y+3)
1645     {
1646         // going down
1647         int x = 0;
1648         int y = 0;
1649         m_anchor->GetSize( x, y, this );
1650         y += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1651         x += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1652         int x_pos = GetScrollPos( wxHORIZONTAL );
1653         // Item should appear at top
1654         SetScrollbars( PIXELS_PER_UNIT, PIXELS_PER_UNIT, x/PIXELS_PER_UNIT, y/PIXELS_PER_UNIT, x_pos, item_y/PIXELS_PER_UNIT );
1655     }
1656     else if (item_y+GetLineHeight(gitem) > start_y+client_h)
1657     {
1658         // going up
1659         int x = 0;
1660         int y = 0;
1661         m_anchor->GetSize( x, y, this );
1662         y += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1663         x += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1664         item_y += PIXELS_PER_UNIT+2;
1665         int x_pos = GetScrollPos( wxHORIZONTAL );
1666         // Item should appear at bottom
1667         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 );
1668     }
1669 }
1670
1671 // FIXME: tree sorting functions are not reentrant and not MT-safe!
1672 static wxGenericTreeCtrl *s_treeBeingSorted = NULL;
1673
1674 static int LINKAGEMODE tree_ctrl_compare_func(wxGenericTreeItem **item1,
1675                                   wxGenericTreeItem **item2)
1676 {
1677     wxCHECK_MSG( s_treeBeingSorted, 0, wxT("bug in wxGenericTreeCtrl::SortChildren()") );
1678
1679     return s_treeBeingSorted->OnCompareItems(*item1, *item2);
1680 }
1681
1682 int wxGenericTreeCtrl::OnCompareItems(const wxTreeItemId& item1,
1683                                const wxTreeItemId& item2)
1684 {
1685     return wxStrcmp(GetItemText(item1), GetItemText(item2));
1686 }
1687
1688 void wxGenericTreeCtrl::SortChildren(const wxTreeItemId& itemId)
1689 {
1690     wxCHECK_RET( itemId.IsOk(), wxT("invalid tree item") );
1691
1692     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1693
1694     wxCHECK_RET( !s_treeBeingSorted,
1695                  wxT("wxGenericTreeCtrl::SortChildren is not reentrant") );
1696
1697     wxArrayGenericTreeItems& children = item->GetChildren();
1698     if ( children.Count() > 1 )
1699     {
1700         m_dirty = TRUE;
1701
1702         s_treeBeingSorted = this;
1703         children.Sort(tree_ctrl_compare_func);
1704         s_treeBeingSorted = NULL;
1705     }
1706     //else: don't make the tree dirty as nothing changed
1707 }
1708
1709 wxImageList *wxGenericTreeCtrl::GetImageList() const
1710 {
1711     return m_imageListNormal;
1712 }
1713
1714 wxImageList *wxGenericTreeCtrl::GetButtonsImageList() const
1715 {
1716     return m_imageListButtons;
1717 }
1718
1719 wxImageList *wxGenericTreeCtrl::GetStateImageList() const
1720 {
1721     return m_imageListState;
1722 }
1723
1724 void wxGenericTreeCtrl::CalculateLineHeight()
1725 {
1726     wxClientDC dc(this);
1727     m_lineHeight = (int)(dc.GetCharHeight() + 4);
1728
1729     if ( m_imageListNormal )
1730     {
1731         // Calculate a m_lineHeight value from the normal Image sizes.
1732         // May be toggle off. Then wxGenericTreeCtrl will spread when
1733         // necessary (which might look ugly).
1734         int n = m_imageListNormal->GetImageCount();
1735         for (int i = 0; i < n ; i++)
1736         {
1737             int width = 0, height = 0;
1738             m_imageListNormal->GetSize(i, width, height);
1739             if (height > m_lineHeight) m_lineHeight = height;
1740         }
1741     }
1742
1743     if (m_imageListButtons)
1744     {
1745         // Calculate a m_lineHeight value from the Button image sizes.
1746         // May be toggle off. Then wxGenericTreeCtrl will spread when
1747         // necessary (which might look ugly).
1748         int n = m_imageListButtons->GetImageCount();
1749         for (int i = 0; i < n ; i++)
1750         {
1751             int width = 0, height = 0;
1752             m_imageListButtons->GetSize(i, width, height);
1753             if (height > m_lineHeight) m_lineHeight = height;
1754         }
1755     }
1756
1757     if (m_lineHeight < 30)
1758         m_lineHeight += 2;                 // at least 2 pixels
1759     else
1760         m_lineHeight += m_lineHeight/10;   // otherwise 10% extra spacing
1761 }
1762
1763 void wxGenericTreeCtrl::SetImageList(wxImageList *imageList)
1764 {
1765     if (m_ownsImageListNormal) delete m_imageListNormal;
1766     m_imageListNormal = imageList;
1767     m_ownsImageListNormal = FALSE;
1768     m_dirty = TRUE;
1769     CalculateLineHeight();
1770 }
1771
1772 void wxGenericTreeCtrl::SetStateImageList(wxImageList *imageList)
1773 {
1774     if (m_ownsImageListState) delete m_imageListState;
1775     m_imageListState = imageList;
1776     m_ownsImageListState = FALSE;
1777 }
1778
1779 void wxGenericTreeCtrl::SetButtonsImageList(wxImageList *imageList)
1780 {
1781     if (m_ownsImageListButtons) delete m_imageListButtons;
1782     m_imageListButtons = imageList;
1783     m_ownsImageListButtons = FALSE;
1784     m_dirty = TRUE;
1785     CalculateLineHeight();
1786 }
1787
1788 void wxGenericTreeCtrl::AssignImageList(wxImageList *imageList)
1789 {
1790     SetImageList(imageList);
1791     m_ownsImageListNormal = TRUE;
1792 }
1793
1794 void wxGenericTreeCtrl::AssignStateImageList(wxImageList *imageList)
1795 {
1796     SetStateImageList(imageList);
1797     m_ownsImageListState = TRUE;
1798 }
1799
1800 void wxGenericTreeCtrl::AssignButtonsImageList(wxImageList *imageList)
1801 {
1802     SetButtonsImageList(imageList);
1803     m_ownsImageListButtons = TRUE;
1804 }
1805
1806 // -----------------------------------------------------------------------------
1807 // helpers
1808 // -----------------------------------------------------------------------------
1809
1810 void wxGenericTreeCtrl::AdjustMyScrollbars()
1811 {
1812     if (m_anchor)
1813     {
1814         int x = 0, y = 0;
1815         m_anchor->GetSize( x, y, this );
1816         y += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1817         x += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1818         int x_pos = GetScrollPos( wxHORIZONTAL );
1819         int y_pos = GetScrollPos( wxVERTICAL );
1820         SetScrollbars( PIXELS_PER_UNIT, PIXELS_PER_UNIT, x/PIXELS_PER_UNIT, y/PIXELS_PER_UNIT, x_pos, y_pos );
1821     }
1822     else
1823     {
1824         SetScrollbars( 0, 0, 0, 0 );
1825     }
1826 }
1827
1828 int wxGenericTreeCtrl::GetLineHeight(wxGenericTreeItem *item) const
1829 {
1830     if (GetWindowStyleFlag() & wxTR_HAS_VARIABLE_ROW_HEIGHT)
1831         return item->GetHeight();
1832     else
1833         return m_lineHeight;
1834 }
1835
1836 void wxGenericTreeCtrl::PaintItem(wxGenericTreeItem *item, wxDC& dc)
1837 {
1838     // TODO implement "state" icon on items
1839
1840     wxTreeItemAttr *attr = item->GetAttributes();
1841     if ( attr && attr->HasFont() )
1842         dc.SetFont(attr->GetFont());
1843     else if (item->IsBold())
1844         dc.SetFont(m_boldFont);
1845
1846     long text_w = 0, text_h = 0;
1847     dc.GetTextExtent( item->GetText(), &text_w, &text_h );
1848
1849     int image_h = 0, image_w = 0;
1850     int image = item->GetCurrentImage();
1851     if ( image != NO_IMAGE )
1852     {
1853         if ( m_imageListNormal )
1854         {
1855             m_imageListNormal->GetSize( image, image_w, image_h );
1856             image_w += 4;
1857         }
1858         else
1859         {
1860             image = NO_IMAGE;
1861         }
1862     }
1863
1864     int total_h = GetLineHeight(item);
1865
1866     if ( item->IsSelected() )
1867     {
1868         dc.SetBrush(*(m_hasFocus ? m_hilightBrush : m_hilightUnfocusedBrush));
1869     }
1870     else
1871     {
1872         wxColour colBg;
1873         if ( attr && attr->HasBackgroundColour() )
1874             colBg = attr->GetBackgroundColour();
1875         else
1876             colBg = m_backgroundColour;
1877         dc.SetBrush(wxBrush(colBg, wxSOLID));
1878     }
1879
1880     int offset = HasFlag(wxTR_ROW_LINES) ? 1 : 0;
1881
1882     if ( item->IsSelected() && image != NO_IMAGE )
1883     {
1884         // If it's selected, and there's an image, then we should
1885         // take care to leave the area under the image painted in the
1886         // background colour.
1887         dc.DrawRectangle( item->GetX() + image_w - 2, item->GetY()+offset,
1888                           item->GetWidth() - image_w + 2, total_h-offset );
1889     }
1890     else
1891     {
1892         dc.DrawRectangle( item->GetX()-2, item->GetY()+offset,
1893                           item->GetWidth()+2, total_h-offset );
1894     }
1895
1896     if ( image != NO_IMAGE )
1897     {
1898         dc.SetClippingRegion( item->GetX(), item->GetY(), image_w-2, total_h );
1899         m_imageListNormal->Draw( image, dc,
1900                                  item->GetX(),
1901                                  item->GetY() +((total_h > image_h)?((total_h-image_h)/2):0),
1902                                  wxIMAGELIST_DRAW_TRANSPARENT );
1903         dc.DestroyClippingRegion();
1904     }
1905
1906     dc.SetBackgroundMode(wxTRANSPARENT);
1907     int extraH = (total_h > text_h) ? (total_h - text_h)/2 : 0;
1908     dc.DrawText( item->GetText(),
1909                  (wxCoord)(image_w + item->GetX()),
1910                  (wxCoord)(item->GetY() + extraH));
1911
1912     // restore normal font
1913     dc.SetFont( m_normalFont );
1914 }
1915
1916 // Now y stands for the top of the item, whereas it used to stand for middle !
1917 void wxGenericTreeCtrl::PaintLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y )
1918 {
1919     int x = level*m_indent;
1920     if (!HasFlag(wxTR_HIDE_ROOT))
1921     {
1922         x += m_indent;
1923     }
1924     else if (level == 0)
1925     {
1926         // always expand hidden root
1927         int origY = y;
1928         wxArrayGenericTreeItems& children = item->GetChildren();
1929         int count = children.Count();
1930         if (count > 0)
1931         {
1932             int n = 0, oldY;
1933             do {
1934                 oldY = y;
1935                 PaintLevel(children[n], dc, 1, y);
1936             } while (++n < count);
1937
1938             if (!HasFlag(wxTR_NO_LINES) && HasFlag(wxTR_LINES_AT_ROOT) && count > 0)
1939             {
1940                 // draw line down to last child
1941                 origY += GetLineHeight(children[0])>>1;
1942                 oldY += GetLineHeight(children[n-1])>>1;
1943                 dc.DrawLine(3, origY, 3, oldY);
1944             }
1945         }
1946         return;
1947     }
1948
1949     item->SetX(x+m_spacing);
1950     item->SetY(y);
1951
1952     int h = GetLineHeight(item);
1953     int y_top = y;
1954     int y_mid = y_top + (h>>1);
1955     y += h;
1956
1957     int exposed_x = dc.LogicalToDeviceX(0);
1958     int exposed_y = dc.LogicalToDeviceY(y_top);
1959
1960     if (IsExposed(exposed_x, exposed_y, 10000, h))  // 10000 = very much
1961     {
1962         if (item->HasPlus() && HasButtons())  // should the item show a button?
1963         {
1964             if (!HasFlag(wxTR_NO_LINES))
1965             {
1966                 if (x > (signed)m_indent)
1967                     dc.DrawLine(x - m_indent, y_mid, x - 5, y_mid);
1968                 else if (HasFlag(wxTR_LINES_AT_ROOT))
1969                     dc.DrawLine(3, y_mid, x - 5, y_mid);
1970                 dc.DrawLine(x + 5, y_mid, x + m_spacing, y_mid);
1971             }
1972
1973             if (m_imageListButtons != NULL)
1974             {
1975                 // draw the image button here
1976                 int image_h = 0, image_w = 0, image = wxTreeItemIcon_Normal;
1977                 if (item->IsExpanded()) image = wxTreeItemIcon_Expanded;
1978                 if (item->IsSelected())
1979                     image += wxTreeItemIcon_Selected - wxTreeItemIcon_Normal;
1980                 m_imageListButtons->GetSize(image, image_w, image_h);
1981                 int xx = x - (image_w>>1);
1982                 int yy = y_mid - (image_h>>1);
1983                 dc.SetClippingRegion(xx, yy, image_w, image_h);
1984                 m_imageListButtons->Draw(image, dc, xx, yy,
1985                                          wxIMAGELIST_DRAW_TRANSPARENT);
1986                 dc.DestroyClippingRegion();
1987             }
1988             else if (HasFlag(wxTR_TWIST_BUTTONS))
1989             {
1990                 // draw the twisty button here
1991                 dc.SetPen(*wxBLACK_PEN);
1992                 dc.SetBrush(*m_hilightBrush);
1993
1994                 wxPoint button[3];
1995
1996                 if (item->IsExpanded())
1997                 {
1998                     button[0].x = x-5;
1999                     button[0].y = y_mid-2;
2000                     button[1].x = x+5;
2001                     button[1].y = y_mid-2;
2002                     button[2].x = x;
2003                     button[2].y = y_mid+3;
2004                 }
2005                 else
2006                 {
2007                     button[0].y = y_mid-5;
2008                     button[0].x = x-2;
2009                     button[1].y = y_mid+5;
2010                     button[1].x = x-2;
2011                     button[2].y = y_mid;
2012                     button[2].x = x+3;
2013                 }
2014                 dc.DrawPolygon(3, button);
2015
2016                 dc.SetPen(m_dottedPen);
2017             }
2018             else // if (HasFlag(wxTR_HAS_BUTTONS))
2019             {
2020                 // draw the plus sign here
2021                 dc.SetPen(*wxGREY_PEN);
2022                 dc.SetBrush(*wxWHITE_BRUSH);
2023                 dc.DrawRectangle(x-5, y_mid-4, 11, 9);
2024                 dc.SetPen(*wxBLACK_PEN);
2025                 dc.DrawLine(x-2, y_mid, x+3, y_mid);
2026                 if (!item->IsExpanded())
2027                     dc.DrawLine(x, y_mid-2, x, y_mid+3);
2028                 dc.SetPen(m_dottedPen);
2029             }
2030         }
2031         else if (!HasFlag(wxTR_NO_LINES))  // no button; maybe a line?
2032         {
2033             // draw the horizontal line here
2034             int x_start = x;
2035             if (x > (signed)m_indent)
2036                 x_start -= m_indent;
2037             else if (HasFlag(wxTR_LINES_AT_ROOT))
2038                 x_start = 3;
2039             dc.DrawLine(x_start, y_mid, x + m_spacing, y_mid);
2040         }
2041
2042         wxPen *pen =
2043 #ifndef __WXMAC__
2044             // don't draw rect outline if we already have the
2045             // background color under Mac
2046             (item->IsSelected() && m_hasFocus) ? wxBLACK_PEN :
2047 #endif // !__WXMAC__
2048             wxTRANSPARENT_PEN;
2049
2050         wxColour colText;
2051         if ( item->IsSelected() )
2052         {
2053             colText = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_HIGHLIGHTTEXT);
2054         }
2055         else
2056         {
2057             wxTreeItemAttr *attr = item->GetAttributes();
2058             if (attr && attr->HasTextColour())
2059                 colText = attr->GetTextColour();
2060             else
2061                 colText = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOWTEXT);
2062         }
2063
2064         // prepare to draw
2065         dc.SetTextForeground(colText);
2066         dc.SetPen(*pen);
2067
2068         // draw
2069         PaintItem(item, dc);
2070
2071         if (HasFlag(wxTR_ROW_LINES))
2072         {
2073             // if the background colour is white, choose a
2074             // contrasting color for the lines
2075             dc.SetPen(*((GetBackgroundColour() == *wxWHITE)
2076                          ? wxMEDIUM_GREY_PEN : wxWHITE_PEN));
2077             dc.DrawLine(0, y_top, 10000, y_top);
2078             dc.DrawLine(0, y, 10000, y);
2079         }
2080
2081         // restore DC objects
2082         dc.SetBrush(*wxWHITE_BRUSH);
2083         dc.SetPen(m_dottedPen);
2084         dc.SetTextForeground(*wxBLACK);
2085     }
2086
2087     if (item->IsExpanded())
2088     {
2089         wxArrayGenericTreeItems& children = item->GetChildren();
2090         int count = children.Count();
2091         if (count > 0)
2092         {
2093             int n = 0, oldY;
2094             ++level;
2095             do {
2096                 oldY = y;
2097                 PaintLevel(children[n], dc, level, y);
2098             } while (++n < count);
2099
2100             if (!HasFlag(wxTR_NO_LINES) && count > 0)
2101             {
2102                 // draw line down to last child
2103                 oldY += GetLineHeight(children[n-1])>>1;
2104                 if (HasButtons()) y_mid += 5;
2105                 dc.DrawLine(x, y_mid, x, oldY);
2106             }
2107         }
2108     }
2109 }
2110
2111 void wxGenericTreeCtrl::DrawDropEffect(wxGenericTreeItem *item)
2112 {
2113     if ( item )
2114     {
2115         if ( item->HasPlus() )
2116         {
2117             // it's a folder, indicate it by a border
2118             DrawBorder(item);
2119         }
2120         else
2121         {
2122             // draw a line under the drop target because the item will be
2123             // dropped there
2124             DrawLine(item, TRUE /* below */);
2125         }
2126
2127         SetCursor(wxCURSOR_BULLSEYE);
2128     }
2129     else
2130     {
2131         // can't drop here
2132         SetCursor(wxCURSOR_NO_ENTRY);
2133     }
2134 }
2135
2136 void wxGenericTreeCtrl::DrawBorder(const wxTreeItemId &item)
2137 {
2138     wxCHECK_RET( item.IsOk(), _T("invalid item in wxGenericTreeCtrl::DrawLine") );
2139
2140     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
2141
2142     wxClientDC dc(this);
2143     PrepareDC( dc );
2144     dc.SetLogicalFunction(wxINVERT);
2145     dc.SetBrush(*wxTRANSPARENT_BRUSH);
2146
2147     int w = i->GetWidth() + 2;
2148     int h = GetLineHeight(i) + 2;
2149
2150     dc.DrawRectangle( i->GetX() - 1, i->GetY() - 1, w, h);
2151 }
2152
2153 void wxGenericTreeCtrl::DrawLine(const wxTreeItemId &item, bool below)
2154 {
2155     wxCHECK_RET( item.IsOk(), _T("invalid item in wxGenericTreeCtrl::DrawLine") );
2156
2157     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
2158
2159     wxClientDC dc(this);
2160     PrepareDC( dc );
2161     dc.SetLogicalFunction(wxINVERT);
2162
2163     int x = i->GetX(),
2164         y = i->GetY();
2165     if ( below )
2166     {
2167         y += GetLineHeight(i) - 1;
2168     }
2169
2170     dc.DrawLine( x, y, x + i->GetWidth(), y);
2171 }
2172
2173 // -----------------------------------------------------------------------------
2174 // wxWindows callbacks
2175 // -----------------------------------------------------------------------------
2176
2177 void wxGenericTreeCtrl::OnPaint( wxPaintEvent &WXUNUSED(event) )
2178 {
2179     wxPaintDC dc(this);
2180     PrepareDC( dc );
2181
2182     if ( !m_anchor)
2183         return;
2184
2185     dc.SetFont( m_normalFont );
2186     dc.SetPen( m_dottedPen );
2187
2188     // this is now done dynamically
2189     //if(GetImageList() == NULL)
2190     // m_lineHeight = (int)(dc.GetCharHeight() + 4);
2191
2192     int y = 2;
2193     PaintLevel( m_anchor, dc, 0, y );
2194 }
2195
2196 void wxGenericTreeCtrl::OnSetFocus( wxFocusEvent &event )
2197 {
2198     m_hasFocus = TRUE;
2199
2200     RefreshSelected();
2201
2202     event.Skip();
2203 }
2204
2205 void wxGenericTreeCtrl::OnKillFocus( wxFocusEvent &event )
2206 {
2207     m_hasFocus = FALSE;
2208
2209     RefreshSelected();
2210
2211     event.Skip();
2212 }
2213
2214 void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
2215 {
2216     wxTreeEvent te( wxEVT_COMMAND_TREE_KEY_DOWN, GetId() );
2217     te.m_evtKey = event;
2218     te.SetEventObject( this );
2219     if ( GetEventHandler()->ProcessEvent( te ) )
2220     {
2221         // intercepted by the user code
2222         return;
2223     }
2224
2225     if ( (m_current == 0) || (m_key_current == 0) )
2226     {
2227         event.Skip();
2228         return;
2229     }
2230
2231     // how should the selection work for this event?
2232     bool is_multiple, extended_select, unselect_others;
2233     EventFlagsToSelType(GetWindowStyleFlag(),
2234                         event.ShiftDown(),
2235                         event.ControlDown(),
2236                         is_multiple, extended_select, unselect_others);
2237
2238     // + : Expand
2239     // - : Collaspe
2240     // * : Expand all/Collapse all
2241     // ' ' | return : activate
2242     // up    : go up (not last children!)
2243     // down  : go down
2244     // left  : go to parent
2245     // right : open if parent and go next
2246     // home  : go to root
2247     // end   : go to last item without opening parents
2248     switch (event.KeyCode())
2249     {
2250         case '+':
2251         case WXK_ADD:
2252             if (m_current->HasPlus() && !IsExpanded(m_current))
2253             {
2254                 Expand(m_current);
2255             }
2256             break;
2257
2258         case '*':
2259         case WXK_MULTIPLY:
2260             if ( !IsExpanded(m_current) )
2261             {
2262                 // expand all
2263                 ExpandAll(m_current);
2264                 break;
2265             }
2266             //else: fall through to Collapse() it
2267
2268         case '-':
2269         case WXK_SUBTRACT:
2270             if (IsExpanded(m_current))
2271             {
2272                 Collapse(m_current);
2273             }
2274             break;
2275
2276         case ' ':
2277         case WXK_RETURN:
2278             {
2279                 wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_ACTIVATED, GetId() );
2280                 event.m_item = (long) m_current;
2281                 event.SetEventObject( this );
2282                 GetEventHandler()->ProcessEvent( event );
2283             }
2284             break;
2285
2286             // up goes to the previous sibling or to the last
2287             // of its children if it's expanded
2288         case WXK_UP:
2289             {
2290                 wxTreeItemId prev = GetPrevSibling( m_key_current );
2291                 if (!prev)
2292                 {
2293                     prev = GetParent( m_key_current );
2294                     if ((prev == GetRootItem()) && HasFlag(wxTR_HIDE_ROOT))
2295                     {
2296                         break;  // don't go to root if it is hidden
2297                     }
2298                     if (prev)
2299                     {
2300                         long cookie = 0;
2301                         wxTreeItemId current = m_key_current;
2302                         // TODO: Huh?  If we get here, we'd better be the first child of our parent.  How else could it be?
2303                         if (current == GetFirstChild( prev, cookie ))
2304                         {
2305                             // otherwise we return to where we came from
2306                             SelectItem( prev, unselect_others, extended_select );
2307                             m_key_current= (wxGenericTreeItem*) prev.m_pItem;
2308                             EnsureVisible( prev );
2309                             break;
2310                         }
2311                     }
2312                 }
2313                 if (prev)
2314                 {
2315                     while ( IsExpanded(prev) && HasChildren(prev) )
2316                     {
2317                         wxTreeItemId child = GetLastChild(prev);
2318                         if ( child )
2319                         {
2320                             prev = child;
2321                         }
2322                     }
2323
2324                     SelectItem( prev, unselect_others, extended_select );
2325                     m_key_current=(wxGenericTreeItem*) prev.m_pItem;
2326                     EnsureVisible( prev );
2327                 }
2328             }
2329             break;
2330
2331             // left arrow goes to the parent
2332         case WXK_LEFT:
2333             {
2334                 wxTreeItemId prev = GetParent( m_current );
2335                 if ((prev == GetRootItem()) && HasFlag(wxTR_HIDE_ROOT))
2336                 {
2337                     // don't go to root if it is hidden
2338                     prev = GetPrevSibling( m_current );
2339                 }
2340                 if (prev)
2341                 {
2342                     EnsureVisible( prev );
2343                     SelectItem( prev, unselect_others, extended_select );
2344                 }
2345             }
2346             break;
2347
2348         case WXK_RIGHT:
2349             // this works the same as the down arrow except that we
2350             // also expand the item if it wasn't expanded yet
2351             Expand(m_current);
2352             // fall through
2353
2354         case WXK_DOWN:
2355             {
2356                 if (IsExpanded(m_key_current) && HasChildren(m_key_current))
2357                 {
2358                     long cookie = 0;
2359                     wxTreeItemId child = GetFirstChild( m_key_current, cookie );
2360                     SelectItem( child, unselect_others, extended_select );
2361                     m_key_current=(wxGenericTreeItem*) child.m_pItem;
2362                     EnsureVisible( child );
2363                 }
2364                 else
2365                 {
2366                     wxTreeItemId next = GetNextSibling( m_key_current );
2367                     if (!next)
2368                     {
2369                         wxTreeItemId current = m_key_current;
2370                         while (current && !next)
2371                         {
2372                             current = GetParent( current );
2373                             if (current) next = GetNextSibling( current );
2374                         }
2375                     }
2376                     if (next)
2377                     {
2378                         SelectItem( next, unselect_others, extended_select );
2379                         m_key_current=(wxGenericTreeItem*) next.m_pItem;
2380                         EnsureVisible( next );
2381                     }
2382                 }
2383             }
2384             break;
2385
2386             // <End> selects the last visible tree item
2387         case WXK_END:
2388             {
2389                 wxTreeItemId last = GetRootItem();
2390
2391                 while ( last.IsOk() && IsExpanded(last) )
2392                 {
2393                     wxTreeItemId lastChild = GetLastChild(last);
2394
2395                     // it may happen if the item was expanded but then all of
2396                     // its children have been deleted - so IsExpanded() returned
2397                     // TRUE, but GetLastChild() returned invalid item
2398                     if ( !lastChild )
2399                         break;
2400
2401                     last = lastChild;
2402                 }
2403
2404                 if ( last.IsOk() )
2405                 {
2406                     EnsureVisible( last );
2407                     SelectItem( last, unselect_others, extended_select );
2408                 }
2409             }
2410             break;
2411
2412             // <Home> selects the root item
2413         case WXK_HOME:
2414             {
2415                 wxTreeItemId prev = GetRootItem();
2416                 if (!prev) break;
2417                 if (HasFlag(wxTR_HIDE_ROOT))
2418                 {
2419                     long dummy;
2420                     prev = GetFirstChild(prev, dummy);
2421                     if (!prev) break;
2422                 }
2423                 EnsureVisible( prev );
2424                 SelectItem( prev, unselect_others, extended_select );
2425             }
2426             break;
2427
2428         default:
2429             event.Skip();
2430     }
2431 }
2432
2433 wxTreeItemId wxGenericTreeCtrl::HitTest(const wxPoint& point, int& flags)
2434 {
2435     // JACS: removed wxYieldIfNeeded() because it can cause the window
2436     // to be deleted from under us if a close window event is pending
2437
2438     int w, h;
2439     GetSize(&w, &h);
2440     flags=0;
2441     if (point.x<0) flags |= wxTREE_HITTEST_TOLEFT;
2442     if (point.x>w) flags |= wxTREE_HITTEST_TORIGHT;
2443     if (point.y<0) flags |= wxTREE_HITTEST_ABOVE;
2444     if (point.y>h) flags |= wxTREE_HITTEST_BELOW;
2445     if (flags) return wxTreeItemId();
2446
2447     if (m_anchor == NULL)
2448     {
2449         flags = wxTREE_HITTEST_NOWHERE;
2450         return wxTreeItemId();
2451     }
2452
2453     wxClientDC dc(this);
2454     PrepareDC(dc);
2455     wxCoord x = dc.DeviceToLogicalX( point.x );
2456     wxCoord y = dc.DeviceToLogicalY( point.y );
2457     wxGenericTreeItem *hit =  m_anchor->HitTest(wxPoint(x, y),
2458                                                 this,
2459                                                 flags,
2460                                                 0 );
2461     if (hit == NULL)
2462     {
2463         flags = wxTREE_HITTEST_NOWHERE;
2464         return wxTreeItemId();
2465     }
2466     return hit;
2467 }
2468
2469 // get the bounding rectangle of the item (or of its label only)
2470 bool wxGenericTreeCtrl::GetBoundingRect(const wxTreeItemId& item,
2471                          wxRect& rect,
2472                          bool WXUNUSED(textOnly)) const
2473 {
2474     wxCHECK_MSG( item.IsOk(), FALSE, _T("invalid item in wxGenericTreeCtrl::GetBoundingRect") );
2475
2476     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
2477
2478     int startX, startY;
2479     GetViewStart(& startX, & startY);
2480
2481     rect.x = i->GetX() - startX*PIXELS_PER_UNIT;
2482     rect.y = i->GetY() - startY*PIXELS_PER_UNIT;
2483     rect.width = i->GetWidth();
2484     //rect.height = i->GetHeight();
2485     rect.height = GetLineHeight(i);
2486
2487     return TRUE;
2488 }
2489
2490 /* **** */
2491
2492 void wxGenericTreeCtrl::Edit( const wxTreeItemId& item )
2493 {
2494     if (!item.IsOk()) return;
2495
2496     m_currentEdit = (wxGenericTreeItem*) item.m_pItem;
2497
2498     wxTreeEvent te( wxEVT_COMMAND_TREE_BEGIN_LABEL_EDIT, GetId() );
2499     te.m_item = (long) m_currentEdit;
2500     te.SetEventObject( this );
2501     GetEventHandler()->ProcessEvent( te );
2502
2503     if (!te.IsAllowed()) return;
2504
2505     // We have to call this here because the label in
2506     // question might just have been added and no screen
2507     // update taken place.
2508     if (m_dirty) wxYieldIfNeeded();
2509
2510     wxString s = m_currentEdit->GetText();
2511     int x = m_currentEdit->GetX();
2512     int y = m_currentEdit->GetY();
2513     int w = m_currentEdit->GetWidth();
2514     int h = m_currentEdit->GetHeight();
2515
2516     int image_h = 0;
2517     int image_w = 0;
2518
2519     int image = m_currentEdit->GetCurrentImage();
2520     if ( image != NO_IMAGE )
2521     {
2522         if ( m_imageListNormal )
2523         {
2524             m_imageListNormal->GetSize( image, image_w, image_h );
2525             image_w += 4;
2526         }
2527         else
2528         {
2529             wxFAIL_MSG(_T("you must create an image list to use images!"));
2530         }
2531     }
2532     x += image_w;
2533     w -= image_w + 4; // I don't know why +4 is needed
2534
2535     wxClientDC dc(this);
2536     PrepareDC( dc );
2537     x = dc.LogicalToDeviceX( x );
2538     y = dc.LogicalToDeviceY( y );
2539
2540     wxTreeTextCtrl *text = new wxTreeTextCtrl(this, -1,
2541                                               &m_renameAccept,
2542                                               &m_renameRes,
2543                                               this,
2544                                               s,
2545                                               wxPoint(x-4,y-4),
2546                                               wxSize(w+11,h+8));
2547     text->SetFocus();
2548 }
2549
2550 void wxGenericTreeCtrl::OnRenameTimer()
2551 {
2552     Edit( m_current );
2553 }
2554
2555 void wxGenericTreeCtrl::OnRenameAccept()
2556 {
2557     // TODO if the validator fails this causes a crash
2558     wxTreeEvent le( wxEVT_COMMAND_TREE_END_LABEL_EDIT, GetId() );
2559     le.m_item = (long) m_currentEdit;
2560     le.SetEventObject( this );
2561     le.m_label = m_renameRes;
2562     GetEventHandler()->ProcessEvent( le );
2563
2564     if (!le.IsAllowed()) return;
2565
2566     SetItemText( m_currentEdit, m_renameRes );
2567 }
2568
2569 void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
2570 {
2571     if ( !m_anchor ) return;
2572
2573     // we process left mouse up event (enables in-place edit), right down
2574     // (pass to the user code), left dbl click (activate item) and
2575     // dragging/moving events for items drag-and-drop
2576     if ( !(event.LeftDown() ||
2577            event.LeftUp() ||
2578            event.RightDown() ||
2579            event.LeftDClick() ||
2580            event.Dragging() ||
2581            ((event.Moving() || event.RightUp()) && m_isDragging)) )
2582     {
2583         event.Skip();
2584
2585         return;
2586     }
2587
2588     wxClientDC dc(this);
2589     PrepareDC(dc);
2590     wxCoord x = dc.DeviceToLogicalX( event.GetX() );
2591     wxCoord y = dc.DeviceToLogicalY( event.GetY() );
2592
2593     int flags = 0;
2594     wxGenericTreeItem *item = m_anchor->HitTest( wxPoint(x,y),
2595                                                  this,
2596                                                  flags,
2597                                                  0 );
2598
2599     if ( event.Dragging() && !m_isDragging )
2600     {
2601         if (m_dragCount == 0)
2602             m_dragStart = wxPoint(x,y);
2603
2604         m_dragCount++;
2605
2606         if (m_dragCount != 3)
2607         {
2608             // wait until user drags a bit further...
2609             return;
2610         }
2611
2612         wxEventType command = event.RightIsDown()
2613                               ? wxEVT_COMMAND_TREE_BEGIN_RDRAG
2614                               : wxEVT_COMMAND_TREE_BEGIN_DRAG;
2615
2616         wxTreeEvent nevent( command, GetId() );
2617         nevent.m_item = (long) m_current;
2618         nevent.SetEventObject(this);
2619
2620         // by default the dragging is not supported, the user code must
2621         // explicitly allow the event for it to take place
2622         nevent.Veto();
2623
2624         if ( GetEventHandler()->ProcessEvent(nevent) && nevent.IsAllowed() )
2625         {
2626             // we're going to drag this item
2627             m_isDragging = TRUE;
2628
2629             // remember the old cursor because we will change it while
2630             // dragging
2631             m_oldCursor = m_cursor;
2632
2633             // in a single selection control, hide the selection temporarily
2634             if ( !(GetWindowStyleFlag() & wxTR_MULTIPLE) )
2635             {
2636                 m_oldSelection = (wxGenericTreeItem*) GetSelection().m_pItem;
2637
2638                 if ( m_oldSelection )
2639                 {
2640                     m_oldSelection->SetHilight(FALSE);
2641                     RefreshLine(m_oldSelection);
2642                 }
2643             }
2644
2645             CaptureMouse();
2646         }
2647     }
2648     else if ( event.Moving() )
2649     {
2650         if ( item != m_dropTarget )
2651         {
2652             // unhighlight the previous drop target
2653             DrawDropEffect(m_dropTarget);
2654
2655             m_dropTarget = item;
2656
2657             // highlight the current drop target if any
2658             DrawDropEffect(m_dropTarget);
2659
2660             wxYieldIfNeeded();
2661         }
2662     }
2663     else if ( (event.LeftUp() || event.RightUp()) && m_isDragging )
2664     {
2665         // erase the highlighting
2666         DrawDropEffect(m_dropTarget);
2667
2668         if ( m_oldSelection )
2669         {
2670             m_oldSelection->SetHilight(TRUE);
2671             RefreshLine(m_oldSelection);
2672             m_oldSelection = (wxGenericTreeItem *)NULL;
2673         }
2674
2675         // generate the drag end event
2676         wxTreeEvent event(wxEVT_COMMAND_TREE_END_DRAG, GetId());
2677
2678         event.m_item = (long) item;
2679         event.m_pointDrag = wxPoint(x, y);
2680         event.SetEventObject(this);
2681
2682         (void)GetEventHandler()->ProcessEvent(event);
2683
2684         m_isDragging = FALSE;
2685         m_dropTarget = (wxGenericTreeItem *)NULL;
2686
2687         ReleaseMouse();
2688
2689         SetCursor(m_oldCursor);
2690
2691         wxYieldIfNeeded();
2692     }
2693     else
2694     {
2695         // here we process only the messages which happen on tree items
2696
2697         m_dragCount = 0;
2698
2699         if (item == NULL) return;  /* we hit the blank area */
2700
2701         if ( event.RightDown() )
2702         {
2703             wxTreeEvent nevent(wxEVT_COMMAND_TREE_ITEM_RIGHT_CLICK, GetId());
2704             nevent.m_item = (long) item;
2705             CalcScrolledPosition(x, y,
2706                                  &nevent.m_pointDrag.x,
2707                                  &nevent.m_pointDrag.y);
2708             nevent.SetEventObject(this);
2709             GetEventHandler()->ProcessEvent(nevent);
2710         }
2711         else if ( event.LeftUp() )
2712         {
2713             if ( m_lastOnSame )
2714             {
2715                 if ( (item == m_current) &&
2716                      (flags & wxTREE_HITTEST_ONITEMLABEL) &&
2717                      HasFlag(wxTR_EDIT_LABELS) )
2718                 {
2719                     if ( m_renameTimer->IsRunning() )
2720                         m_renameTimer->Stop();
2721
2722                     m_renameTimer->Start( 100, TRUE );
2723                 }
2724
2725                 m_lastOnSame = FALSE;
2726             }
2727         }
2728         else // !RightDown() && !LeftUp() ==> LeftDown() || LeftDClick()
2729         {
2730             if ( event.LeftDown() )
2731             {
2732                 m_lastOnSame = item == m_current;
2733             }
2734
2735             if ( flags & wxTREE_HITTEST_ONITEMBUTTON )
2736             {
2737                 // only toggle the item for a single click, double click on
2738                 // the button doesn't do anything (it toggles the item twice)
2739                 if ( event.LeftDown() )
2740                 {
2741                     Toggle( item );
2742                 }
2743
2744                 // don't select the item if the button was clicked
2745                 return;
2746             }
2747
2748             // how should the selection work for this event?
2749             bool is_multiple, extended_select, unselect_others;
2750             EventFlagsToSelType(GetWindowStyleFlag(),
2751                                 event.ShiftDown(),
2752                                 event.ControlDown(),
2753                                 is_multiple, extended_select, unselect_others);
2754
2755             SelectItem(item, unselect_others, extended_select);
2756
2757             // For some reason, Windows isn't recognizing a left double-click,
2758             // so we need to simulate it here.  Allow 200 milliseconds for now.
2759             if ( event.LeftDClick() )
2760             {
2761                 // double clicking should not start editing the item label
2762                 m_renameTimer->Stop();
2763                 m_lastOnSame = FALSE;
2764
2765                 // send activate event first
2766                 wxTreeEvent nevent( wxEVT_COMMAND_TREE_ITEM_ACTIVATED, GetId() );
2767                 nevent.m_item = (long) item;
2768                 CalcScrolledPosition(x, y,
2769                                      &nevent.m_pointDrag.x,
2770                                      &nevent.m_pointDrag.y);
2771                 nevent.SetEventObject( this );
2772                 if ( !GetEventHandler()->ProcessEvent( nevent ) )
2773                 {
2774                     // if the user code didn't process the activate event,
2775                     // handle it ourselves by toggling the item when it is
2776                     // double clicked
2777                     if ( item->HasPlus() )
2778                     {
2779                         Toggle(item);
2780                     }
2781                 }
2782             }
2783         }
2784     }
2785 }
2786
2787 void wxGenericTreeCtrl::OnIdle( wxIdleEvent &WXUNUSED(event) )
2788 {
2789     /* after all changes have been done to the tree control,
2790      * we actually redraw the tree when everything is over */
2791
2792     if (!m_dirty) return;
2793
2794     m_dirty = FALSE;
2795
2796     CalculatePositions();
2797     Refresh();
2798     AdjustMyScrollbars();
2799 }
2800
2801 void wxGenericTreeCtrl::CalculateSize( wxGenericTreeItem *item, wxDC &dc )
2802 {
2803     wxCoord text_w = 0;
2804     wxCoord text_h = 0;
2805
2806     if (item->IsBold())
2807         dc.SetFont(m_boldFont);
2808
2809     dc.GetTextExtent( item->GetText(), &text_w, &text_h );
2810     text_h+=2;
2811
2812     // restore normal font
2813     dc.SetFont( m_normalFont );
2814
2815     int image_h = 0;
2816     int image_w = 0;
2817     int image = item->GetCurrentImage();
2818     if ( image != NO_IMAGE )
2819     {
2820         if ( m_imageListNormal )
2821         {
2822             m_imageListNormal->GetSize( image, image_w, image_h );
2823             image_w += 4;
2824         }
2825     }
2826
2827     int total_h = (image_h > text_h) ? image_h : text_h;
2828
2829     if (total_h < 30)
2830         total_h += 2;            // at least 2 pixels
2831     else
2832         total_h += total_h/10;   // otherwise 10% extra spacing
2833
2834     item->SetHeight(total_h);
2835     if (total_h>m_lineHeight)
2836         m_lineHeight=total_h;
2837
2838     item->SetWidth(image_w+text_w+2);
2839 }
2840
2841 // -----------------------------------------------------------------------------
2842 // for developper : y is now the top of the level
2843 // not the middle of it !
2844 void wxGenericTreeCtrl::CalculateLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y )
2845 {
2846     int x = level*m_indent;
2847     if (!HasFlag(wxTR_HIDE_ROOT))
2848     {
2849         x += m_indent;
2850     }
2851     else if (level == 0)
2852     {
2853         // a hidden root is not evaluated, but its
2854         // children are always calculated
2855         goto Recurse;
2856     }
2857
2858     CalculateSize( item, dc );
2859
2860     // set its position
2861     item->SetX( x+m_spacing );
2862     item->SetY( y );
2863     y += GetLineHeight(item);
2864
2865     if ( !item->IsExpanded() )
2866     {
2867         // we don't need to calculate collapsed branches
2868         return;
2869     }
2870
2871   Recurse:
2872     wxArrayGenericTreeItems& children = item->GetChildren();
2873     size_t n, count = children.Count();
2874     ++level;
2875     for (n = 0; n < count; ++n )
2876         CalculateLevel( children[n], dc, level, y );  // recurse
2877 }
2878
2879 void wxGenericTreeCtrl::CalculatePositions()
2880 {
2881     if ( !m_anchor ) return;
2882
2883     wxClientDC dc(this);
2884     PrepareDC( dc );
2885
2886     dc.SetFont( m_normalFont );
2887
2888     dc.SetPen( m_dottedPen );
2889     //if(GetImageList() == NULL)
2890     // m_lineHeight = (int)(dc.GetCharHeight() + 4);
2891
2892     int y = 2;
2893     CalculateLevel( m_anchor, dc, 0, y ); // start recursion
2894 }
2895
2896 void wxGenericTreeCtrl::RefreshSubtree(wxGenericTreeItem *item)
2897 {
2898     if (m_dirty) return;
2899
2900     wxClientDC dc(this);
2901     PrepareDC(dc);
2902
2903     int cw = 0;
2904     int ch = 0;
2905     GetClientSize( &cw, &ch );
2906
2907     wxRect rect;
2908     rect.x = dc.LogicalToDeviceX( 0 );
2909     rect.width = cw;
2910     rect.y = dc.LogicalToDeviceY( item->GetY() );
2911     rect.height = ch;
2912
2913     Refresh( TRUE, &rect );
2914
2915     AdjustMyScrollbars();
2916 }
2917
2918 void wxGenericTreeCtrl::RefreshLine( wxGenericTreeItem *item )
2919 {
2920     if (m_dirty) return;
2921
2922     wxClientDC dc(this);
2923     PrepareDC( dc );
2924
2925     int cw = 0;
2926     int ch = 0;
2927     GetClientSize( &cw, &ch );
2928
2929     wxRect rect;
2930     rect.x = dc.LogicalToDeviceX( 0 );
2931     rect.y = dc.LogicalToDeviceY( item->GetY() );
2932     rect.width = cw;
2933     rect.height = GetLineHeight(item); //dc.GetCharHeight() + 6;
2934
2935     Refresh( TRUE, &rect );
2936 }
2937
2938 void wxGenericTreeCtrl::RefreshSelected()
2939 {
2940     // TODO: this is awfully inefficient, we should keep the list of all
2941     //       selected items internally, should be much faster
2942     if ( m_anchor )
2943         RefreshSelectedUnder(m_anchor);
2944 }
2945
2946 void wxGenericTreeCtrl::RefreshSelectedUnder(wxGenericTreeItem *item)
2947 {
2948     if ( item->IsSelected() )
2949         RefreshLine(item);
2950
2951     const wxArrayGenericTreeItems& children = item->GetChildren();
2952     size_t count = children.GetCount();
2953     for ( size_t n = 0; n < count; n++ )
2954     {
2955         RefreshSelectedUnder(children[n]);
2956     }
2957 }
2958
2959 // ----------------------------------------------------------------------------
2960 // changing colours: we need to refresh the tree control
2961 // ----------------------------------------------------------------------------
2962
2963 bool wxGenericTreeCtrl::SetBackgroundColour(const wxColour& colour)
2964 {
2965     if ( !wxWindow::SetBackgroundColour(colour) )
2966         return FALSE;
2967
2968     Refresh();
2969
2970     return TRUE;
2971 }
2972
2973 bool wxGenericTreeCtrl::SetForegroundColour(const wxColour& colour)
2974 {
2975     if ( !wxWindow::SetForegroundColour(colour) )
2976         return FALSE;
2977
2978     Refresh();
2979
2980     return TRUE;
2981 }
2982
2983 #endif // wxUSE_TREECTRL