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 // Aqua arrows
  60 // ----------------------------------------------------------------------------
  61
  62         /* XPM */
  63         static char *aqua_arrow_right[] = {
  64         /* columns rows colors chars-per-pixel */
  65         "13 11 4 1",
  66         "  c None",
  67         "b c #C0C0C0",
  68         "c c #707070",
  69         "d c #A0A0A0",
  70         /* pixels */
  71         "    b        ",
  72         "    ddb      ",
  73         "    cccdb    ",
  74         "    cccccd   ",
  75         "    ccccccdb ",
  76         "    ccccccccd",
  77         "    ccccccdb ",
  78         "    cccccb   ",
  79         "    cccdb    ",
  80         "    ddb      ",
  81         "    b        "
  82         };
  83
  84         /* XPM */
  85         static char *aqua_arrow_down[] = {
  86         /* columns rows colors chars-per-pixel */
  87         "13 11 4 1",
  88         "  c None",
  89         "b c #C0C0C0",
  90         "c c #707070",
  91         "d c #A0A0A0",
  92         /* pixels */
  93         "             ",
  94         "             ",
  95         " bdcccccccdb ",
  96         "  dcccccccd  ",
  97         "  bcccccccb  ",
  98         "   dcccccd   ",
  99         "   bcccccb   ",
 100         "    bcccd    ",
 101         "     dcd     ",
 102         "     bcb     ",
 103         "      d      "
 104         };
 105
 106 // -----------------------------------------------------------------------------
 107 // private classes
 108 // -----------------------------------------------------------------------------
 109
 110 // timer used for enabling in-place edit
 111 class WXDLLEXPORT wxTreeRenameTimer: public wxTimer
 112 {
 113 public:
 114     wxTreeRenameTimer( wxGenericTreeCtrl *owner );
 115
 116     void Notify();
 117
 118 private:
 119     wxGenericTreeCtrl   *m_owner;
 120 };
 121
 122 // control used for in-place edit
 123 class WXDLLEXPORT wxTreeTextCtrl: public wxTextCtrl
 124 {
 125 public:
 126     wxTreeTextCtrl( wxWindow *parent,
 127                     const wxWindowID id,
 128                     bool *accept,
 129                     wxString *res,
 130                     wxGenericTreeCtrl *owner,
 131                     const wxString &value = wxEmptyString,
 132                     const wxPoint &pos = wxDefaultPosition,
 133                     const wxSize &size = wxDefaultSize,
 134                     int style = wxSIMPLE_BORDER,
 135                     const wxValidator& validator = wxDefaultValidator,
 136                     const wxString &name = wxTextCtrlNameStr );
 137
 138     void OnChar( wxKeyEvent &event );
 139     void OnKeyUp( wxKeyEvent &event );
 140     void OnKillFocus( wxFocusEvent &event );
 141
 142 private:
 143     bool               *m_accept;
 144     wxString           *m_res;
 145     wxGenericTreeCtrl  *m_owner;
 146     wxString            m_startValue;
 147     bool                m_finished;
 148
 149     DECLARE_EVENT_TABLE()
 150 };
 151
 152 // a tree item
 153 class WXDLLEXPORT wxGenericTreeItem
 154 {
 155 public:
 156     // ctors & dtor
 157     wxGenericTreeItem() { m_data = NULL; }
 158     wxGenericTreeItem( wxGenericTreeItem *parent,
 159                        const wxString& text,
 160                        int image,
 161                        int selImage,
 162                        wxTreeItemData *data );
 163
 164     ~wxGenericTreeItem();
 165
 166     // trivial accessors
 167     wxArrayGenericTreeItems& GetChildren() { return m_children; }
 168
 169     const wxString& GetText() const { return m_text; }
 170     int GetImage(wxTreeItemIcon which = wxTreeItemIcon_Normal) const
 171         { return m_images[which]; }
 172     wxTreeItemData *GetData() const { return m_data; }
 173
 174     // returns the current image for the item (depending on its
 175     // selected/expanded/whatever state)
 176     int GetCurrentImage() const;
 177
 178     void SetText( const wxString &text );
 179     void SetImage(int image, wxTreeItemIcon which) { m_images[which] = image; }
 180     void SetData(wxTreeItemData *data) { m_data = data; }
 181
 182     void SetHasPlus(bool has = TRUE) { m_hasPlus = has; }
 183
 184     void SetBold(bool bold) { m_isBold = bold; }
 185
 186     int GetX() const { return m_x; }
 187     int GetY() const { return m_y; }
 188
 189     void SetX(int x) { m_x = x; }
 190     void SetY(int y) { m_y = y; }
 191
 192     int  GetHeight() const { return m_height; }
 193     int  GetWidth()  const { return m_width; }
 194
 195     void SetHeight(int h) { m_height = h; }
 196     void SetWidth(int w) { m_width = w; }
 197
 198     wxGenericTreeItem *GetParent() const { return m_parent; }
 199
 200     // operations
 201         // deletes all children notifying the treectrl about it if !NULL
 202         // pointer given
 203     void DeleteChildren(wxGenericTreeCtrl *tree = NULL);
 204
 205     // get count of all children (and grand children if 'recursively')
 206     size_t GetChildrenCount(bool recursively = TRUE) const;
 207
 208     void Insert(wxGenericTreeItem *child, size_t index)
 209     { m_children.Insert(child, index); }
 210
 211     void GetSize( int &x, int &y, const wxGenericTreeCtrl* );
 212
 213         // return the item at given position (or NULL if no item), onButton is
 214         // TRUE if the point belongs to the item's button, otherwise it lies
 215         // on the button's label
 216     wxGenericTreeItem *HitTest( const wxPoint& point,
 217                                 const wxGenericTreeCtrl *,
 218                                 int &flags,
 219                                 int level );
 220
 221     void Expand() { m_isCollapsed = FALSE; }
 222     void Collapse() { m_isCollapsed = TRUE; }
 223
 224     void SetHilight( bool set = TRUE ) { m_hasHilight = set; }
 225
 226     // status inquiries
 227     bool HasChildren() const { return !m_children.IsEmpty(); }
 228     bool IsSelected()  const { return m_hasHilight != 0; }
 229     bool IsExpanded()  const { return !m_isCollapsed; }
 230     bool HasPlus()     const { return m_hasPlus || HasChildren(); }
 231     bool IsBold()      const { return m_isBold != 0; }
 232
 233     // attributes
 234         // get them - may be NULL
 235     wxTreeItemAttr *GetAttributes() const { return m_attr; }
 236         // get them ensuring that the pointer is not NULL
 237     wxTreeItemAttr& Attr()
 238     {
 239         if ( !m_attr )
 240         {
 241             m_attr = new wxTreeItemAttr;
 242             m_ownsAttr = TRUE;
 243         }
 244         return *m_attr;
 245     }
 246         // set them
 247     void SetAttributes(wxTreeItemAttr *attr)
 248     {
 249         if ( m_ownsAttr ) delete m_attr;
 250         m_attr = attr;
 251         m_ownsAttr = FALSE;
 252     }
 253         // set them and delete when done
 254     void AssignAttributes(wxTreeItemAttr *attr)
 255     {
 256         SetAttributes(attr);
 257         m_ownsAttr = TRUE;
 258     }
 259
 260 private:
 261     // since there can be very many of these, we save size by chosing
 262     // the smallest representation for the elements and by ordering
 263     // the members to avoid padding.
 264     wxString            m_text;         // label to be rendered for item
 265
 266     wxTreeItemData     *m_data;         // user-provided data
 267
 268     wxArrayGenericTreeItems m_children; // list of children
 269     wxGenericTreeItem  *m_parent;       // parent of this item
 270
 271     wxTreeItemAttr     *m_attr;         // attributes???
 272
 273     // tree ctrl images for the normal, selected, expanded and
 274     // expanded+selected states
 275     short               m_images[wxTreeItemIcon_Max];
 276
 277     wxCoord             m_x;            // (virtual) offset from top
 278     short               m_y;            // (virtual) offset from left
 279     short               m_width;        // width of this item
 280     unsigned char       m_height;       // height of this item
 281
 282     // use bitfields to save size
 283     int                 m_isCollapsed :1;
 284     int                 m_hasHilight  :1; // same as focused
 285     int                 m_hasPlus     :1; // used for item which doesn't have
 286                                           // children but has a [+] button
 287     int                 m_isBold      :1; // render the label in bold font
 288     int                 m_ownsAttr    :1; // delete attribute when done
 289 };
 290
 291 // =============================================================================
 292 // implementation
 293 // =============================================================================
 294
 295 // ----------------------------------------------------------------------------
 296 // private functions
 297 // ----------------------------------------------------------------------------
 298
 299 // translate the key or mouse event flags to the type of selection we're
 300 // dealing with
 301 static void EventFlagsToSelType(long style,
 302                                 bool shiftDown,
 303                                 bool ctrlDown,
 304                                 bool &is_multiple,
 305                                 bool &extended_select,
 306                                 bool &unselect_others)
 307 {
 308     is_multiple = (style & wxTR_MULTIPLE) != 0;
 309     extended_select = shiftDown && is_multiple;
 310     unselect_others = !(extended_select || (ctrlDown && is_multiple));
 311 }
 312
 313 // -----------------------------------------------------------------------------
 314 // wxTreeRenameTimer (internal)
 315 // -----------------------------------------------------------------------------
 316
 317 wxTreeRenameTimer::wxTreeRenameTimer( wxGenericTreeCtrl *owner )
 318 {
 319     m_owner = owner;
 320 }
 321
 322 void wxTreeRenameTimer::Notify()
 323 {
 324     m_owner->OnRenameTimer();
 325 }
 326
 327 //-----------------------------------------------------------------------------
 328 // wxTreeTextCtrl (internal)
 329 //-----------------------------------------------------------------------------
 330
 331 BEGIN_EVENT_TABLE(wxTreeTextCtrl,wxTextCtrl)
 332     EVT_CHAR           (wxTreeTextCtrl::OnChar)
 333     EVT_KEY_UP         (wxTreeTextCtrl::OnKeyUp)
 334     EVT_KILL_FOCUS     (wxTreeTextCtrl::OnKillFocus)
 335 END_EVENT_TABLE()
 336
 337 wxTreeTextCtrl::wxTreeTextCtrl( wxWindow *parent,
 338                                 const wxWindowID id,
 339                                 bool *accept,
 340                                 wxString *res,
 341                                 wxGenericTreeCtrl *owner,
 342                                 const wxString &value,
 343                                 const wxPoint &pos,
 344                                 const wxSize &size,
 345                                 int style,
 346                                 const wxValidator& validator,
 347                                 const wxString &name )
 348     : wxTextCtrl( parent, id, value, pos, size, style, validator, name )
 349 {
 350     m_res = res;
 351     m_accept = accept;
 352     m_owner = owner;
 353     (*m_accept) = FALSE;
 354     (*m_res) = wxEmptyString;
 355     m_startValue = value;
 356     m_finished = FALSE;
 357 }
 358
 359 void wxTreeTextCtrl::OnChar( wxKeyEvent &event )
 360 {
 361     if (event.m_keyCode == WXK_RETURN)
 362     {
 363         (*m_accept) = TRUE;
 364         (*m_res) = GetValue();
 365
 366         if ((*m_res) != m_startValue)
 367             m_owner->OnRenameAccept();
 368
 369         if (!wxPendingDelete.Member(this))
 370             wxPendingDelete.Append(this);
 371
 372         m_finished = TRUE;
 373         m_owner->SetFocus(); // This doesn't work. TODO.
 374
 375         return;
 376     }
 377     if (event.m_keyCode == WXK_ESCAPE)
 378     {
 379         (*m_accept) = FALSE;
 380         (*m_res) = "";
 381
 382         if (!wxPendingDelete.Member(this))
 383             wxPendingDelete.Append(this);
 384
 385         m_finished = TRUE;
 386         m_owner->SetFocus(); // This doesn't work. TODO.
 387
 388         return;
 389     }
 390     event.Skip();
 391 }
 392
 393 void wxTreeTextCtrl::OnKeyUp( wxKeyEvent &event )
 394 {
 395     if (m_finished)
 396     {
 397         event.Skip();
 398         return;
 399     }
 400
 401     // auto-grow the textctrl:
 402     wxSize parentSize = m_owner->GetSize();
 403     wxPoint myPos = GetPosition();
 404     wxSize mySize = GetSize();
 405     int sx, sy;
 406     GetTextExtent(GetValue() + _T("M"), &sx, &sy);
 407     if (myPos.x + sx > parentSize.x) sx = parentSize.x - myPos.x;
 408     if (mySize.x > sx) sx = mySize.x;
 409     SetSize(sx, -1);
 410
 411     event.Skip();
 412 }
 413
 414 void wxTreeTextCtrl::OnKillFocus( wxFocusEvent &event )
 415 {
 416     if (m_finished)
 417     {
 418         event.Skip();
 419         return;
 420     }
 421
 422     if (!wxPendingDelete.Member(this))
 423         wxPendingDelete.Append(this);
 424
 425     (*m_accept) = TRUE;
 426     (*m_res) = GetValue();
 427
 428     if ((*m_res) != m_startValue)
 429         m_owner->OnRenameAccept();
 430 }
 431
 432 // -----------------------------------------------------------------------------
 433 // wxGenericTreeItem
 434 // -----------------------------------------------------------------------------
 435
 436 wxGenericTreeItem::wxGenericTreeItem(wxGenericTreeItem *parent,
 437                                      const wxString& text,
 438                                      int image, int selImage,
 439                                      wxTreeItemData *data)
 440                  : m_text(text)
 441 {
 442     m_images[wxTreeItemIcon_Normal] = image;
 443     m_images[wxTreeItemIcon_Selected] = selImage;
 444     m_images[wxTreeItemIcon_Expanded] = NO_IMAGE;
 445     m_images[wxTreeItemIcon_SelectedExpanded] = NO_IMAGE;
 446
 447     m_data = data;
 448     m_x = m_y = 0;
 449
 450     m_isCollapsed = TRUE;
 451     m_hasHilight = FALSE;
 452     m_hasPlus = FALSE;
 453     m_isBold = FALSE;
 454
 455     m_parent = parent;
 456
 457     m_attr = (wxTreeItemAttr *)NULL;
 458     m_ownsAttr = FALSE;
 459
 460     // We don't know the height here yet.
 461     m_width = 0;
 462     m_height = 0;
 463 }
 464
 465 wxGenericTreeItem::~wxGenericTreeItem()
 466 {
 467     delete m_data;
 468
 469     if (m_ownsAttr) delete m_attr;
 470
 471     wxASSERT_MSG( m_children.IsEmpty(),
 472                   wxT("please call DeleteChildren() before deleting the item") );
 473 }
 474
 475 void wxGenericTreeItem::DeleteChildren(wxGenericTreeCtrl *tree)
 476 {
 477     size_t count = m_children.Count();
 478     for ( size_t n = 0; n < count; n++ )
 479     {
 480         wxGenericTreeItem *child = m_children[n];
 481         if (tree)
 482             tree->SendDeleteEvent(child);
 483
 484         child->DeleteChildren(tree);
 485         delete child;
 486     }
 487
 488     m_children.Empty();
 489 }
 490
 491 void wxGenericTreeItem::SetText( const wxString &text )
 492 {
 493     m_text = text;
 494 }
 495
 496 size_t wxGenericTreeItem::GetChildrenCount(bool recursively) const
 497 {
 498     size_t count = m_children.Count();
 499     if ( !recursively )
 500         return count;
 501
 502     size_t total = count;
 503     for (size_t n = 0; n < count; ++n)
 504     {
 505         total += m_children[n]->GetChildrenCount();
 506     }
 507
 508     return total;
 509 }
 510
 511 void wxGenericTreeItem::GetSize( int &x, int &y,
 512                                  const wxGenericTreeCtrl *theButton )
 513 {
 514     int bottomY=m_y+theButton->GetLineHeight(this);
 515     if ( y < bottomY ) y = bottomY;
 516     int width = m_x +  m_width;
 517     if ( x < width ) x = width;
 518
 519     if (IsExpanded())
 520     {
 521         size_t count = m_children.Count();
 522         for ( size_t n = 0; n < count; ++n )
 523         {
 524             m_children[n]->GetSize( x, y, theButton );
 525         }
 526     }
 527 }
 528
 529 wxGenericTreeItem *wxGenericTreeItem::HitTest(const wxPoint& point,
 530                                               const wxGenericTreeCtrl *theCtrl,
 531                                               int &flags,
 532                                               int level)
 533 {
 534     // for a hidden root node, don't evaluate it, but do evaluate children
 535     if ( !(level == 0 && theCtrl->HasFlag(wxTR_HIDE_ROOT)) )
 536     {
 537         // evaluate the item
 538         int h = theCtrl->GetLineHeight(this);
 539         if ((point.y > m_y) && (point.y < m_y + h))
 540         {
 541             int y_mid = m_y + h/2;
 542             if (point.y < y_mid )
 543                 flags |= wxTREE_HITTEST_ONITEMUPPERPART;
 544             else
 545                 flags |= wxTREE_HITTEST_ONITEMLOWERPART;
 546
 547             // 5 is the size of the plus sign
 548             int xCross = m_x - theCtrl->GetSpacing();
 549             if ((point.x > xCross-5) && (point.x < xCross+5) &&
 550                 (point.y > y_mid-5) && (point.y < y_mid+5) &&
 551                 HasPlus() && theCtrl->HasButtons() )
 552             {
 553                 flags |= wxTREE_HITTEST_ONITEMBUTTON;
 554                 return this;
 555             }
 556
 557             if ((point.x >= m_x) && (point.x <= m_x+m_width))
 558             {
 559                 int image_w = -1;
 560                 int image_h;
 561
 562                 // assuming every image (normal and selected) has the same size!
 563                 if ( (GetImage() != NO_IMAGE) && theCtrl->m_imageListNormal )
 564                     theCtrl->m_imageListNormal->GetSize(GetImage(),
 565                                                         image_w, image_h);
 566
 567                 if ((image_w != -1) && (point.x <= m_x + image_w + 1))
 568                     flags |= wxTREE_HITTEST_ONITEMICON;
 569                 else
 570                     flags |= wxTREE_HITTEST_ONITEMLABEL;
 571
 572                 return this;
 573             }
 574
 575             if (point.x < m_x)
 576                 flags |= wxTREE_HITTEST_ONITEMINDENT;
 577             if (point.x > m_x+m_width)
 578                 flags |= wxTREE_HITTEST_ONITEMRIGHT;
 579
 580             return this;
 581         }
 582
 583         // if children are expanded, fall through to evaluate them
 584         if (m_isCollapsed) return (wxGenericTreeItem*) NULL;
 585     }
 586
 587     // evaluate children
 588     size_t count = m_children.Count();
 589     for ( size_t n = 0; n < count; n++ )
 590     {
 591         wxGenericTreeItem *res = m_children[n]->HitTest( point,
 592                                                          theCtrl,
 593                                                          flags,
 594                                                          level + 1 );
 595         if ( res != NULL )
 596             return res;
 597     }
 598
 599     return (wxGenericTreeItem*) NULL;
 600 }
 601
 602 int wxGenericTreeItem::GetCurrentImage() const
 603 {
 604     int image = NO_IMAGE;
 605     if ( IsExpanded() )
 606     {
 607         if ( IsSelected() )
 608         {
 609             image = GetImage(wxTreeItemIcon_SelectedExpanded);
 610         }
 611
 612         if ( image == NO_IMAGE )
 613         {
 614             // we usually fall back to the normal item, but try just the
 615             // expanded one (and not selected) first in this case
 616             image = GetImage(wxTreeItemIcon_Expanded);
 617         }
 618     }
 619     else // not expanded
 620     {
 621         if ( IsSelected() )
 622             image = GetImage(wxTreeItemIcon_Selected);
 623     }
 624
 625     // maybe it doesn't have the specific image we want,
 626     // try the default one instead
 627     if ( image == NO_IMAGE ) image = GetImage();
 628
 629     return image;
 630 }
 631
 632 // -----------------------------------------------------------------------------
 633 // wxGenericTreeCtrl implementation
 634 // -----------------------------------------------------------------------------
 635
 636 IMPLEMENT_DYNAMIC_CLASS(wxGenericTreeCtrl, wxScrolledWindow)
 637
 638 BEGIN_EVENT_TABLE(wxGenericTreeCtrl,wxScrolledWindow)
 639     EVT_PAINT          (wxGenericTreeCtrl::OnPaint)
 640     EVT_MOUSE_EVENTS   (wxGenericTreeCtrl::OnMouse)
 641     EVT_CHAR           (wxGenericTreeCtrl::OnChar)
 642     EVT_SET_FOCUS      (wxGenericTreeCtrl::OnSetFocus)
 643     EVT_KILL_FOCUS     (wxGenericTreeCtrl::OnKillFocus)
 644     EVT_IDLE           (wxGenericTreeCtrl::OnIdle)
 645 END_EVENT_TABLE()
 646
 647 #if !defined(__WXMSW__) || defined(__WIN16__) || defined(__WXUNIVERSAL__)
 648 /*
 649  * wxTreeCtrl has to be a real class or we have problems with
 650  * the run-time information.
 651  */
 652
 653 IMPLEMENT_DYNAMIC_CLASS(wxTreeCtrl, wxGenericTreeCtrl)
 654 #endif
 655
 656 // -----------------------------------------------------------------------------
 657 // construction/destruction
 658 // -----------------------------------------------------------------------------
 659
 660 void wxGenericTreeCtrl::Init()
 661 {
 662     m_current = m_key_current = m_anchor = (wxGenericTreeItem *) NULL;
 663     m_hasFocus = FALSE;
 664     m_dirty = FALSE;
 665
 666     m_lineHeight = 10;
 667     m_indent = 15;
 668     m_spacing = 18;
 669
 670     m_hilightBrush = new wxBrush
 671                          (
 672                             wxSystemSettings::GetSystemColour
 673                             (
 674                                 wxSYS_COLOUR_HIGHLIGHT
 675                             ),
 676                             wxSOLID
 677                          );
 678
 679     m_hilightUnfocusedBrush = new wxBrush
 680                               (
 681                                  wxSystemSettings::GetSystemColour
 682                                  (
 683                                      wxSYS_COLOUR_BTNSHADOW
 684                                  ),
 685                                  wxSOLID
 686                               );
 687
 688     m_imageListNormal = m_imageListButtons =
 689     m_imageListState = (wxImageList *) NULL;
 690     m_ownsImageListNormal = m_ownsImageListButtons =
 691     m_ownsImageListState = FALSE;
 692
 693     m_dragCount = 0;
 694     m_isDragging = FALSE;
 695     m_dropTarget = m_oldSelection = (wxGenericTreeItem *)NULL;
 696
 697     m_renameTimer = new wxTreeRenameTimer( this );
 698     m_lastOnSame = FALSE;
 699
 700     m_normalFont = wxSystemSettings::GetSystemFont( wxSYS_DEFAULT_GUI_FONT );
 701     m_boldFont = wxFont( m_normalFont.GetPointSize(),
 702                          m_normalFont.GetFamily(),
 703                          m_normalFont.GetStyle(),
 704                          wxBOLD,
 705                          m_normalFont.GetUnderlined());
 706 }
 707
 708 bool wxGenericTreeCtrl::Create(wxWindow *parent,
 709                                wxWindowID id,
 710                                const wxPoint& pos,
 711                                const wxSize& size,
 712                                long style,
 713                                const wxValidator &validator,
 714                                const wxString& name )
 715 {
 716 #ifdef __WXMAC__
 717     int major,minor;
 718     wxGetOsVersion( &major, &minor );
 719
 720     if (style & wxTR_HAS_BUTTONS) style |= wxTR_MAC_BUTTONS;
 721     if (style & wxTR_HAS_BUTTONS) style &= ~wxTR_HAS_BUTTONS;
 722     style &= ~wxTR_LINES_AT_ROOT;
 723     style |= wxTR_NO_LINES;
 724     if (major < 10)
 725         style |= wxTR_ROW_LINES;
 726     if (major >= 10)
 727         style |= wxTR_AQUA_BUTTONS;
 728 #endif
 729
 730     if (style & wxTR_AQUA_BUTTONS)
 731     {
 732         m_arrowRight = new wxBitmap( aqua_arrow_right );
 733         m_arrowDown = new wxBitmap( aqua_arrow_down );
 734     }
 735     else
 736     {
 737         m_arrowRight = NULL;
 738         m_arrowDown = NULL;
 739     }
 740
 741     wxScrolledWindow::Create( parent, id, pos, size,
 742                               style|wxHSCROLL|wxVSCROLL, name );
 743
 744         // If the tree display has no buttons, but does have
 745         // connecting lines, we can use a narrower layout.
 746         // It may not be a good idea to force this...
 747     if (!HasButtons() && !HasFlag(wxTR_NO_LINES))
 748     {
 749         m_indent= 10;
 750         m_spacing = 10;
 751     }
 752
 753 #if wxUSE_VALIDATORS
 754     SetValidator( validator );
 755 #endif
 756
 757     SetBackgroundColour( wxSystemSettings::GetSystemColour( wxSYS_COLOUR_LISTBOX ) );
 758
 759 //  m_dottedPen = wxPen( "grey", 0, wxDOT );  too slow under XFree86
 760     m_dottedPen = wxPen( wxT("grey"), 0, 0 );
 761
 762     return TRUE;
 763 }
 764
 765 wxGenericTreeCtrl::~wxGenericTreeCtrl()
 766 {
 767     delete m_hilightBrush;
 768     delete m_hilightUnfocusedBrush;
 769
 770     if (m_arrowRight) delete m_arrowRight;
 771     if (m_arrowDown) delete m_arrowDown;
 772
 773     DeleteAllItems();
 774
 775     delete m_renameTimer;
 776     if (m_ownsImageListNormal) delete m_imageListNormal;
 777     if (m_ownsImageListState) delete m_imageListState;
 778     if (m_ownsImageListButtons) delete m_imageListButtons;
 779 }
 780
 781 // -----------------------------------------------------------------------------
 782 // accessors
 783 // -----------------------------------------------------------------------------
 784
 785 size_t wxGenericTreeCtrl::GetCount() const
 786 {
 787     return m_anchor == NULL ? 0u : m_anchor->GetChildrenCount();
 788 }
 789
 790 void wxGenericTreeCtrl::SetIndent(unsigned int indent)
 791 {
 792     m_indent = indent;
 793     m_dirty = TRUE;
 794 }
 795
 796 void wxGenericTreeCtrl::SetSpacing(unsigned int spacing)
 797 {
 798     m_spacing = spacing;
 799     m_dirty = TRUE;
 800 }
 801
 802 size_t wxGenericTreeCtrl::GetChildrenCount(const wxTreeItemId& item, bool recursively)
 803 {
 804     wxCHECK_MSG( item.IsOk(), 0u, wxT("invalid tree item") );
 805
 806     return ((wxGenericTreeItem*) item.m_pItem)->GetChildrenCount(recursively);
 807 }
 808
 809 void wxGenericTreeCtrl::SetWindowStyle(const long styles)
 810 {
 811         // right now, just sets the styles.  Eventually, we may
 812         // want to update the inherited styles, but right now
 813         // none of the parents has updatable styles
 814     m_windowStyle = styles;
 815     m_dirty = TRUE;
 816 }
 817
 818 // -----------------------------------------------------------------------------
 819 // functions to work with tree items
 820 // -----------------------------------------------------------------------------
 821
 822 wxString wxGenericTreeCtrl::GetItemText(const wxTreeItemId& item) const
 823 {
 824     wxCHECK_MSG( item.IsOk(), wxT(""), wxT("invalid tree item") );
 825
 826     return ((wxGenericTreeItem*) item.m_pItem)->GetText();
 827 }
 828
 829 int wxGenericTreeCtrl::GetItemImage(const wxTreeItemId& item,
 830                              wxTreeItemIcon which) const
 831 {
 832     wxCHECK_MSG( item.IsOk(), -1, wxT("invalid tree item") );
 833
 834     return ((wxGenericTreeItem*) item.m_pItem)->GetImage(which);
 835 }
 836
 837 wxTreeItemData *wxGenericTreeCtrl::GetItemData(const wxTreeItemId& item) const
 838 {
 839     wxCHECK_MSG( item.IsOk(), NULL, wxT("invalid tree item") );
 840
 841     return ((wxGenericTreeItem*) item.m_pItem)->GetData();
 842 }
 843
 844 void wxGenericTreeCtrl::SetItemText(const wxTreeItemId& item, const wxString& text)
 845 {
 846     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 847
 848     wxClientDC dc(this);
 849     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 850     pItem->SetText(text);
 851     CalculateSize(pItem, dc);
 852     RefreshLine(pItem);
 853 }
 854
 855 void wxGenericTreeCtrl::SetItemImage(const wxTreeItemId& item,
 856                               int image,
 857                               wxTreeItemIcon which)
 858 {
 859     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 860
 861     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 862     pItem->SetImage(image, which);
 863
 864     wxClientDC dc(this);
 865     CalculateSize(pItem, dc);
 866     RefreshLine(pItem);
 867 }
 868
 869 void wxGenericTreeCtrl::SetItemData(const wxTreeItemId& item, wxTreeItemData *data)
 870 {
 871     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 872
 873     ((wxGenericTreeItem*) item.m_pItem)->SetData(data);
 874 }
 875
 876 void wxGenericTreeCtrl::SetItemHasChildren(const wxTreeItemId& item, bool has)
 877 {
 878     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 879
 880     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 881     pItem->SetHasPlus(has);
 882     RefreshLine(pItem);
 883 }
 884
 885 void wxGenericTreeCtrl::SetItemBold(const wxTreeItemId& item, bool bold)
 886 {
 887     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 888
 889     // avoid redrawing the tree if no real change
 890     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 891     if ( pItem->IsBold() != bold )
 892     {
 893         pItem->SetBold(bold);
 894         RefreshLine(pItem);
 895     }
 896 }
 897
 898 void wxGenericTreeCtrl::SetItemTextColour(const wxTreeItemId& item,
 899                                    const wxColour& col)
 900 {
 901     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 902
 903     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 904     pItem->Attr().SetTextColour(col);
 905     RefreshLine(pItem);
 906 }
 907
 908 void wxGenericTreeCtrl::SetItemBackgroundColour(const wxTreeItemId& item,
 909                                          const wxColour& col)
 910 {
 911     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 912
 913     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 914     pItem->Attr().SetBackgroundColour(col);
 915     RefreshLine(pItem);
 916 }
 917
 918 void wxGenericTreeCtrl::SetItemFont(const wxTreeItemId& item, const wxFont& font)
 919 {
 920     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 921
 922     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 923     pItem->Attr().SetFont(font);
 924     RefreshLine(pItem);
 925 }
 926
 927 bool wxGenericTreeCtrl::SetFont( const wxFont &font )
 928 {
 929     wxScrolledWindow::SetFont(font);
 930
 931     m_normalFont = font ;
 932     m_boldFont = wxFont( m_normalFont.GetPointSize(),
 933                             m_normalFont.GetFamily(),
 934                             m_normalFont.GetStyle(),
 935                             wxBOLD,
 936                             m_normalFont.GetUnderlined());
 937
 938     return TRUE;
 939 }
 940
 941
 942 // -----------------------------------------------------------------------------
 943 // item status inquiries
 944 // -----------------------------------------------------------------------------
 945
 946 bool wxGenericTreeCtrl::IsVisible(const wxTreeItemId& item) const
 947 {
 948     wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
 949
 950     // An item is only visible if it's not a descendant of a collapsed item
 951     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 952     wxGenericTreeItem* parent = pItem->GetParent();
 953     while (parent)
 954     {
 955         if (!parent->IsExpanded())
 956             return FALSE;
 957         parent = parent->GetParent();
 958     }
 959
 960     int startX, startY;
 961     GetViewStart(& startX, & startY);
 962
 963     wxSize clientSize = GetClientSize();
 964
 965     wxRect rect;
 966     if (!GetBoundingRect(item, rect))
 967         return FALSE;
 968     if (rect.GetWidth() == 0 || rect.GetHeight() == 0)
 969         return FALSE;
 970     if (rect.GetBottom() < 0 || rect.GetTop() > clientSize.y)
 971         return FALSE;
 972     if (rect.GetRight() < 0 || rect.GetLeft() > clientSize.x)
 973         return FALSE;
 974
 975     return TRUE;
 976 }
 977
 978 bool wxGenericTreeCtrl::ItemHasChildren(const wxTreeItemId& item) const
 979 {
 980     wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
 981
 982     // consider that the item does have children if it has the "+" button: it
 983     // might not have them (if it had never been expanded yet) but then it
 984     // could have them as well and it's better to err on this side rather than
 985     // disabling some operations which are restricted to the items with
 986     // children for an item which does have them
 987     return ((wxGenericTreeItem*) item.m_pItem)->HasPlus();
 988 }
 989
 990 bool wxGenericTreeCtrl::IsExpanded(const wxTreeItemId& item) const
 991 {
 992     wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
 993
 994     return ((wxGenericTreeItem*) item.m_pItem)->IsExpanded();
 995 }
 996
 997 bool wxGenericTreeCtrl::IsSelected(const wxTreeItemId& item) const
 998 {
 999     wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
1000
1001     return ((wxGenericTreeItem*) item.m_pItem)->IsSelected();
1002 }
1003
1004 bool wxGenericTreeCtrl::IsBold(const wxTreeItemId& item) const
1005 {
1006     wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
1007
1008     return ((wxGenericTreeItem*) item.m_pItem)->IsBold();
1009 }
1010
1011 // -----------------------------------------------------------------------------
1012 // navigation
1013 // -----------------------------------------------------------------------------
1014
1015 wxTreeItemId wxGenericTreeCtrl::GetParent(const wxTreeItemId& item) const
1016 {
1017     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
1018
1019     return ((wxGenericTreeItem*) item.m_pItem)->GetParent();
1020 }
1021
1022 wxTreeItemId wxGenericTreeCtrl::GetFirstChild(const wxTreeItemId& item, long& cookie) const
1023 {
1024     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
1025
1026     cookie = 0;
1027     return GetNextChild(item, cookie);
1028 }
1029
1030 wxTreeItemId wxGenericTreeCtrl::GetNextChild(const wxTreeItemId& item, long& cookie) const
1031 {
1032     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
1033
1034     wxArrayGenericTreeItems& children = ((wxGenericTreeItem*) item.m_pItem)->GetChildren();
1035     if ( (size_t)cookie < children.Count() )
1036     {
1037         return children.Item((size_t)cookie++);
1038     }
1039     else
1040     {
1041         // there are no more of them
1042         return wxTreeItemId();
1043     }
1044 }
1045
1046 wxTreeItemId wxGenericTreeCtrl::GetLastChild(const wxTreeItemId& item) const
1047 {
1048     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
1049
1050     wxArrayGenericTreeItems& children = ((wxGenericTreeItem*) item.m_pItem)->GetChildren();
1051     return (children.IsEmpty() ? wxTreeItemId() : wxTreeItemId(children.Last()));
1052 }
1053
1054 wxTreeItemId wxGenericTreeCtrl::GetNextSibling(const wxTreeItemId& item) const
1055 {
1056     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
1057
1058     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
1059     wxGenericTreeItem *parent = i->GetParent();
1060     if ( parent == NULL )
1061     {
1062         // root item doesn't have any siblings
1063         return wxTreeItemId();
1064     }
1065
1066     wxArrayGenericTreeItems& siblings = parent->GetChildren();
1067     int index = siblings.Index(i);
1068     wxASSERT( index != wxNOT_FOUND ); // I'm not a child of my parent?
1069
1070     size_t n = (size_t)(index + 1);
1071     return n == siblings.Count() ? wxTreeItemId() : wxTreeItemId(siblings[n]);
1072 }
1073
1074 wxTreeItemId wxGenericTreeCtrl::GetPrevSibling(const wxTreeItemId& item) const
1075 {
1076     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
1077
1078     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
1079     wxGenericTreeItem *parent = i->GetParent();
1080     if ( parent == NULL )
1081     {
1082         // root item doesn't have any siblings
1083         return wxTreeItemId();
1084     }
1085
1086     wxArrayGenericTreeItems& siblings = parent->GetChildren();
1087     int index = siblings.Index(i);
1088     wxASSERT( index != wxNOT_FOUND ); // I'm not a child of my parent?
1089
1090     return index == 0 ? wxTreeItemId()
1091                       : wxTreeItemId(siblings[(size_t)(index - 1)]);
1092 }
1093
1094 // Only for internal use right now, but should probably be public
1095 wxTreeItemId wxGenericTreeCtrl::GetNext(const wxTreeItemId& item) const
1096 {
1097     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
1098
1099     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
1100
1101     // First see if there are any children.
1102     wxArrayGenericTreeItems& children = i->GetChildren();
1103     if (children.GetCount() > 0)
1104     {
1105          return children.Item(0);
1106     }
1107     else
1108     {
1109          // Try a sibling of this or ancestor instead
1110          wxTreeItemId p = item;
1111          wxTreeItemId toFind;
1112          do
1113          {
1114               toFind = GetNextSibling(p);
1115               p = GetParent(p);
1116          } while (p.IsOk() && !toFind.IsOk());
1117          return toFind;
1118     }
1119 }
1120
1121 wxTreeItemId wxGenericTreeCtrl::GetFirstVisibleItem() const
1122 {
1123     wxTreeItemId id = GetRootItem();
1124     if (!id.IsOk())
1125         return id;
1126
1127     do
1128     {
1129         if (IsVisible(id))
1130               return id;
1131         id = GetNext(id);
1132     } while (id.IsOk());
1133
1134     return wxTreeItemId();
1135 }
1136
1137 wxTreeItemId wxGenericTreeCtrl::GetNextVisible(const wxTreeItemId& item) const
1138 {
1139     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
1140
1141     wxTreeItemId id = item;
1142     if (id.IsOk())
1143     {
1144         while (id = GetNext(id), id.IsOk())
1145         {
1146             if (IsVisible(id))
1147                 return id;
1148         }
1149     }
1150     return wxTreeItemId();
1151 }
1152
1153 wxTreeItemId wxGenericTreeCtrl::GetPrevVisible(const wxTreeItemId& item) const
1154 {
1155     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
1156
1157     wxFAIL_MSG(wxT("not implemented"));
1158
1159     return wxTreeItemId();
1160 }
1161
1162 // -----------------------------------------------------------------------------
1163 // operations
1164 // -----------------------------------------------------------------------------
1165
1166 wxTreeItemId wxGenericTreeCtrl::DoInsertItem(const wxTreeItemId& parentId,
1167                                       size_t previous,
1168                                       const wxString& text,
1169                                       int image, int selImage,
1170                                       wxTreeItemData *data)
1171 {
1172     wxGenericTreeItem *parent = (wxGenericTreeItem*) parentId.m_pItem;
1173     if ( !parent )
1174     {
1175         // should we give a warning here?
1176         return AddRoot(text, image, selImage, data);
1177     }
1178
1179     m_dirty = TRUE;     // do this first so stuff below doesn't cause flicker
1180
1181     wxGenericTreeItem *item =
1182         new wxGenericTreeItem( parent, text, image, selImage, data );
1183
1184     if ( data != NULL )
1185     {
1186         data->m_pItem = (long) item;
1187     }
1188
1189     parent->Insert( item, previous );
1190
1191     return item;
1192 }
1193
1194 wxTreeItemId wxGenericTreeCtrl::AddRoot(const wxString& text,
1195                                  int image, int selImage,
1196                                  wxTreeItemData *data)
1197 {
1198     wxCHECK_MSG( !m_anchor, wxTreeItemId(), wxT("tree can have only one root") );
1199
1200     m_dirty = TRUE;     // do this first so stuff below doesn't cause flicker
1201
1202     m_anchor = new wxGenericTreeItem((wxGenericTreeItem *)NULL, text,
1203                                    image, selImage, data);
1204     if ( data != NULL )
1205     {
1206         data->m_pItem = (long) m_anchor;
1207     }
1208
1209     if (HasFlag(wxTR_HIDE_ROOT))
1210     {
1211         // if root is hidden, make sure we can navigate
1212         // into children
1213         m_anchor->SetHasPlus();
1214         Expand(m_anchor);
1215     }
1216
1217     if (!HasFlag(wxTR_MULTIPLE))
1218     {
1219         m_current = m_key_current = m_anchor;
1220         m_current->SetHilight( TRUE );
1221     }
1222
1223     return m_anchor;
1224 }
1225
1226 wxTreeItemId wxGenericTreeCtrl::PrependItem(const wxTreeItemId& parent,
1227                                      const wxString& text,
1228                                      int image, int selImage,
1229                                      wxTreeItemData *data)
1230 {
1231     return DoInsertItem(parent, 0u, text, image, selImage, data);
1232 }
1233
1234 wxTreeItemId wxGenericTreeCtrl::InsertItem(const wxTreeItemId& parentId,
1235                                     const wxTreeItemId& idPrevious,
1236                                     const wxString& text,
1237                                     int image, int selImage,
1238                                     wxTreeItemData *data)
1239 {
1240     wxGenericTreeItem *parent = (wxGenericTreeItem*) parentId.m_pItem;
1241     if ( !parent )
1242     {
1243         // should we give a warning here?
1244         return AddRoot(text, image, selImage, data);
1245     }
1246
1247     int index = parent->GetChildren().Index((wxGenericTreeItem*) idPrevious.m_pItem);
1248     wxASSERT_MSG( index != wxNOT_FOUND,
1249                   wxT("previous item in wxGenericTreeCtrl::InsertItem() is not a sibling") );
1250
1251     return DoInsertItem(parentId, (size_t)++index, text, image, selImage, data);
1252 }
1253
1254 wxTreeItemId wxGenericTreeCtrl::InsertItem(const wxTreeItemId& parentId,
1255                                     size_t before,
1256                                     const wxString& text,
1257                                     int image, int selImage,
1258                                     wxTreeItemData *data)
1259 {
1260     wxGenericTreeItem *parent = (wxGenericTreeItem*) parentId.m_pItem;
1261     if ( !parent )
1262     {
1263         // should we give a warning here?
1264         return AddRoot(text, image, selImage, data);
1265     }
1266
1267     return DoInsertItem(parentId, before, text, image, selImage, data);
1268 }
1269
1270 wxTreeItemId wxGenericTreeCtrl::AppendItem(const wxTreeItemId& parentId,
1271                                     const wxString& text,
1272                                     int image, int selImage,
1273                                     wxTreeItemData *data)
1274 {
1275     wxGenericTreeItem *parent = (wxGenericTreeItem*) parentId.m_pItem;
1276     if ( !parent )
1277     {
1278         // should we give a warning here?
1279         return AddRoot(text, image, selImage, data);
1280     }
1281
1282     return DoInsertItem( parent, parent->GetChildren().Count(), text,
1283                          image, selImage, data);
1284 }
1285
1286 void wxGenericTreeCtrl::SendDeleteEvent(wxGenericTreeItem *item)
1287 {
1288     wxTreeEvent event( wxEVT_COMMAND_TREE_DELETE_ITEM, GetId() );
1289     event.m_item = (long) item;
1290     event.SetEventObject( this );
1291     ProcessEvent( event );
1292 }
1293
1294 void wxGenericTreeCtrl::DeleteChildren(const wxTreeItemId& itemId)
1295 {
1296     m_dirty = TRUE;     // do this first so stuff below doesn't cause flicker
1297
1298     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1299     item->DeleteChildren(this);
1300 }
1301
1302 void wxGenericTreeCtrl::Delete(const wxTreeItemId& itemId)
1303 {
1304     m_dirty = TRUE;     // do this first so stuff below doesn't cause flicker
1305
1306     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1307
1308     // don't stay with invalid m_key_current or we will crash in
1309     // the next call to OnChar()
1310     bool changeKeyCurrent = FALSE;
1311     wxGenericTreeItem *itemKey = m_key_current;
1312     while ( itemKey )
1313     {
1314         if ( itemKey == item )
1315         {
1316             // m_key_current is a descendant of the item being deleted
1317             changeKeyCurrent = TRUE;
1318             break;
1319         }
1320         itemKey = itemKey->GetParent();
1321     }
1322
1323     wxGenericTreeItem *parent = item->GetParent();
1324     if ( parent )
1325     {
1326         parent->GetChildren().Remove( item );  // remove by value
1327     }
1328
1329     if ( changeKeyCurrent )
1330     {
1331         // may be NULL or not
1332         m_key_current = parent;
1333     }
1334
1335     item->DeleteChildren(this);
1336     SendDeleteEvent(item);
1337     delete item;
1338 }
1339
1340 void wxGenericTreeCtrl::DeleteAllItems()
1341 {
1342     if ( m_anchor )
1343     {
1344         m_dirty = TRUE;
1345
1346         m_anchor->DeleteChildren(this);
1347         delete m_anchor;
1348
1349         m_anchor = NULL;
1350     }
1351 }
1352
1353 void wxGenericTreeCtrl::Expand(const wxTreeItemId& itemId)
1354 {
1355     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1356
1357     wxCHECK_RET( item, _T("invalid item in wxGenericTreeCtrl::Expand") );
1358
1359     if ( !item->HasPlus() )
1360         return;
1361
1362     if ( item->IsExpanded() )
1363         return;
1364
1365     wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_EXPANDING, GetId() );
1366     event.m_item = (long) item;
1367     event.SetEventObject( this );
1368
1369     if ( ProcessEvent( event ) && !event.IsAllowed() )
1370     {
1371         // cancelled by program
1372         return;
1373     }
1374
1375     item->Expand();
1376     CalculatePositions();
1377
1378     RefreshSubtree(item);
1379
1380     event.SetEventType(wxEVT_COMMAND_TREE_ITEM_EXPANDED);
1381     ProcessEvent( event );
1382 }
1383
1384 void wxGenericTreeCtrl::ExpandAll(const wxTreeItemId& item)
1385 {
1386     Expand(item);
1387     if ( IsExpanded(item) )
1388     {
1389         long cookie;
1390         wxTreeItemId child = GetFirstChild(item, cookie);
1391         while ( child.IsOk() )
1392         {
1393             ExpandAll(child);
1394
1395             child = GetNextChild(item, cookie);
1396         }
1397     }
1398 }
1399
1400 void wxGenericTreeCtrl::Collapse(const wxTreeItemId& itemId)
1401 {
1402     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1403
1404     if ( !item->IsExpanded() )
1405         return;
1406
1407     wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_COLLAPSING, GetId() );
1408     event.m_item = (long) item;
1409     event.SetEventObject( this );
1410     if ( ProcessEvent( event ) && !event.IsAllowed() )
1411     {
1412         // cancelled by program
1413         return;
1414     }
1415
1416     item->Collapse();
1417
1418 #if 0  // TODO why should items be collapsed recursively?
1419     wxArrayGenericTreeItems& children = item->GetChildren();
1420     size_t count = children.Count();
1421     for ( size_t n = 0; n < count; n++ )
1422     {
1423         Collapse(children[n]);
1424     }
1425 #endif
1426
1427     CalculatePositions();
1428
1429     RefreshSubtree(item);
1430
1431     event.SetEventType(wxEVT_COMMAND_TREE_ITEM_COLLAPSED);
1432     ProcessEvent( event );
1433 }
1434
1435 void wxGenericTreeCtrl::CollapseAndReset(const wxTreeItemId& item)
1436 {
1437     Collapse(item);
1438     DeleteChildren(item);
1439 }
1440
1441 void wxGenericTreeCtrl::Toggle(const wxTreeItemId& itemId)
1442 {
1443     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1444
1445     if (item->IsExpanded())
1446         Collapse(itemId);
1447     else
1448         Expand(itemId);
1449 }
1450
1451 void wxGenericTreeCtrl::Unselect()
1452 {
1453     if (m_current)
1454     {
1455         m_current->SetHilight( FALSE );
1456         RefreshLine( m_current );
1457     }
1458 }
1459
1460 void wxGenericTreeCtrl::UnselectAllChildren(wxGenericTreeItem *item)
1461 {
1462     if (item->IsSelected())
1463     {
1464         item->SetHilight(FALSE);
1465         RefreshLine(item);
1466     }
1467
1468     if (item->HasChildren())
1469     {
1470         wxArrayGenericTreeItems& children = item->GetChildren();
1471         size_t count = children.Count();
1472         for ( size_t n = 0; n < count; ++n )
1473         {
1474             UnselectAllChildren(children[n]);
1475         }
1476     }
1477 }
1478
1479 void wxGenericTreeCtrl::UnselectAll()
1480 {
1481     wxTreeItemId rootItem = GetRootItem();
1482
1483     // the tree might not have the root item at all
1484     if ( rootItem )
1485     {
1486         UnselectAllChildren((wxGenericTreeItem*) rootItem.m_pItem);
1487     }
1488 }
1489
1490 // Recursive function !
1491 // To stop we must have crt_item<last_item
1492 // Algorithm :
1493 // Tag all next children, when no more children,
1494 // Move to parent (not to tag)
1495 // Keep going... if we found last_item, we stop.
1496 bool wxGenericTreeCtrl::TagNextChildren(wxGenericTreeItem *crt_item, wxGenericTreeItem *last_item, bool select)
1497 {
1498     wxGenericTreeItem *parent = crt_item->GetParent();
1499
1500     if (parent == NULL) // This is root item
1501         return TagAllChildrenUntilLast(crt_item, last_item, select);
1502
1503     wxArrayGenericTreeItems& children = parent->GetChildren();
1504     int index = children.Index(crt_item);
1505     wxASSERT( index != wxNOT_FOUND ); // I'm not a child of my parent?
1506
1507     size_t count = children.Count();
1508     for (size_t n=(size_t)(index+1); n<count; ++n)
1509     {
1510         if (TagAllChildrenUntilLast(children[n], last_item, select)) return TRUE;
1511     }
1512
1513     return TagNextChildren(parent, last_item, select);
1514 }
1515
1516 bool wxGenericTreeCtrl::TagAllChildrenUntilLast(wxGenericTreeItem *crt_item, wxGenericTreeItem *last_item, bool select)
1517 {
1518     crt_item->SetHilight(select);
1519     RefreshLine(crt_item);
1520
1521     if (crt_item==last_item)
1522         return TRUE;
1523
1524     if (crt_item->HasChildren())
1525     {
1526         wxArrayGenericTreeItems& children = crt_item->GetChildren();
1527         size_t count = children.Count();
1528         for ( size_t n = 0; n < count; ++n )
1529         {
1530             if (TagAllChildrenUntilLast(children[n], last_item, select))
1531                 return TRUE;
1532         }
1533     }
1534
1535   return FALSE;
1536 }
1537
1538 void wxGenericTreeCtrl::SelectItemRange(wxGenericTreeItem *item1, wxGenericTreeItem *item2)
1539 {
1540     // item2 is not necessary after item1
1541     wxGenericTreeItem *first=NULL, *last=NULL;
1542
1543     // choice first' and 'last' between item1 and item2
1544     if (item1->GetY()<item2->GetY())
1545     {
1546         first=item1;
1547         last=item2;
1548     }
1549     else
1550     {
1551         first=item2;
1552         last=item1;
1553     }
1554
1555     bool select = m_current->IsSelected();
1556
1557     if ( TagAllChildrenUntilLast(first,last,select) )
1558         return;
1559
1560     TagNextChildren(first,last,select);
1561 }
1562
1563 void wxGenericTreeCtrl::SelectItem(const wxTreeItemId& itemId,
1564                             bool unselect_others,
1565                             bool extended_select)
1566 {
1567     wxCHECK_RET( itemId.IsOk(), wxT("invalid tree item") );
1568
1569     bool is_single=!(GetWindowStyleFlag() & wxTR_MULTIPLE);
1570     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1571
1572     //wxCHECK_RET( ( (!unselect_others) && is_single),
1573     //           wxT("this is a single selection tree") );
1574
1575     // to keep going anyhow !!!
1576     if (is_single)
1577     {
1578         if (item->IsSelected())
1579             return; // nothing to do
1580         unselect_others = TRUE;
1581         extended_select = FALSE;
1582     }
1583     else if ( unselect_others && item->IsSelected() )
1584     {
1585         // selection change if there is more than one item currently selected
1586         wxArrayTreeItemIds selected_items;
1587         if ( GetSelections(selected_items) == 1 )
1588             return;
1589     }
1590
1591     wxTreeEvent event( wxEVT_COMMAND_TREE_SEL_CHANGING, GetId() );
1592     event.m_item = (long) item;
1593     event.m_itemOld = (long) m_current;
1594     event.SetEventObject( this );
1595     // TODO : Here we don't send any selection mode yet !
1596
1597     if ( GetEventHandler()->ProcessEvent( event ) && !event.IsAllowed() )
1598         return;
1599
1600     wxTreeItemId parent = GetParent( itemId );
1601     while (parent.IsOk())
1602     {
1603         if (!IsExpanded(parent))
1604             Expand( parent );
1605
1606         parent = GetParent( parent );
1607     }
1608
1609     EnsureVisible( itemId );
1610
1611     // ctrl press
1612     if (unselect_others)
1613     {
1614         if (is_single) Unselect(); // to speed up thing
1615         else UnselectAll();
1616     }
1617
1618     // shift press
1619     if (extended_select)
1620     {
1621         if ( !m_current )
1622         {
1623             m_current = m_key_current = (wxGenericTreeItem*) GetRootItem().m_pItem;
1624         }
1625
1626         // don't change the mark (m_current)
1627         SelectItemRange(m_current, item);
1628     }
1629     else
1630     {
1631         bool select=TRUE; // the default
1632
1633         // Check if we need to toggle hilight (ctrl mode)
1634         if (!unselect_others)
1635             select=!item->IsSelected();
1636
1637         m_current = m_key_current = item;
1638         m_current->SetHilight(select);
1639         RefreshLine( m_current );
1640     }
1641
1642     event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGED);
1643     GetEventHandler()->ProcessEvent( event );
1644 }
1645
1646 void wxGenericTreeCtrl::FillArray(wxGenericTreeItem *item,
1647                            wxArrayTreeItemIds &array) const
1648 {
1649     if ( item->IsSelected() )
1650         array.Add(wxTreeItemId(item));
1651
1652     if ( item->HasChildren() )
1653     {
1654         wxArrayGenericTreeItems& children = item->GetChildren();
1655         size_t count = children.GetCount();
1656         for ( size_t n = 0; n < count; ++n )
1657             FillArray(children[n], array);
1658     }
1659 }
1660
1661 size_t wxGenericTreeCtrl::GetSelections(wxArrayTreeItemIds &array) const
1662 {
1663     array.Empty();
1664     wxTreeItemId idRoot = GetRootItem();
1665     if ( idRoot.IsOk() )
1666     {
1667         FillArray((wxGenericTreeItem*) idRoot.m_pItem, array);
1668     }
1669     //else: the tree is empty, so no selections
1670
1671     return array.Count();
1672 }
1673
1674 void wxGenericTreeCtrl::EnsureVisible(const wxTreeItemId& item)
1675 {
1676     if (!item.IsOk()) return;
1677
1678     wxGenericTreeItem *gitem = (wxGenericTreeItem*) item.m_pItem;
1679
1680     // first expand all parent branches
1681     wxGenericTreeItem *parent = gitem->GetParent();
1682     while ( parent )
1683     {
1684         Expand(parent);
1685         parent = parent->GetParent();
1686     }
1687
1688     //if (parent) CalculatePositions();
1689
1690     ScrollTo(item);
1691 }
1692
1693 void wxGenericTreeCtrl::ScrollTo(const wxTreeItemId &item)
1694 {
1695     if (!item.IsOk()) return;
1696
1697     // We have to call this here because the label in
1698     // question might just have been added and no screen
1699     // update taken place.
1700     if (m_dirty) wxYieldIfNeeded();
1701
1702     wxGenericTreeItem *gitem = (wxGenericTreeItem*) item.m_pItem;
1703
1704     // now scroll to the item
1705     int item_y = gitem->GetY();
1706
1707     int start_x = 0;
1708     int start_y = 0;
1709     GetViewStart( &start_x, &start_y );
1710     start_y *= PIXELS_PER_UNIT;
1711
1712     int client_h = 0;
1713     int client_w = 0;
1714     GetClientSize( &client_w, &client_h );
1715
1716     if (item_y < start_y+3)
1717     {
1718         // going down
1719         int x = 0;
1720         int y = 0;
1721         m_anchor->GetSize( x, y, this );
1722         y += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1723         x += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1724         int x_pos = GetScrollPos( wxHORIZONTAL );
1725         // Item should appear at top
1726         SetScrollbars( PIXELS_PER_UNIT, PIXELS_PER_UNIT, x/PIXELS_PER_UNIT, y/PIXELS_PER_UNIT, x_pos, item_y/PIXELS_PER_UNIT );
1727     }
1728     else if (item_y+GetLineHeight(gitem) > start_y+client_h)
1729     {
1730         // going up
1731         int x = 0;
1732         int y = 0;
1733         m_anchor->GetSize( x, y, this );
1734         y += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1735         x += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1736         item_y += PIXELS_PER_UNIT+2;
1737         int x_pos = GetScrollPos( wxHORIZONTAL );
1738         // Item should appear at bottom
1739         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 );
1740     }
1741 }
1742
1743 // FIXME: tree sorting functions are not reentrant and not MT-safe!
1744 static wxGenericTreeCtrl *s_treeBeingSorted = NULL;
1745
1746 static int LINKAGEMODE tree_ctrl_compare_func(wxGenericTreeItem **item1,
1747                                   wxGenericTreeItem **item2)
1748 {
1749     wxCHECK_MSG( s_treeBeingSorted, 0, wxT("bug in wxGenericTreeCtrl::SortChildren()") );
1750
1751     return s_treeBeingSorted->OnCompareItems(*item1, *item2);
1752 }
1753
1754 int wxGenericTreeCtrl::OnCompareItems(const wxTreeItemId& item1,
1755                                const wxTreeItemId& item2)
1756 {
1757     return wxStrcmp(GetItemText(item1), GetItemText(item2));
1758 }
1759
1760 void wxGenericTreeCtrl::SortChildren(const wxTreeItemId& itemId)
1761 {
1762     wxCHECK_RET( itemId.IsOk(), wxT("invalid tree item") );
1763
1764     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1765
1766     wxCHECK_RET( !s_treeBeingSorted,
1767                  wxT("wxGenericTreeCtrl::SortChildren is not reentrant") );
1768
1769     wxArrayGenericTreeItems& children = item->GetChildren();
1770     if ( children.Count() > 1 )
1771     {
1772         m_dirty = TRUE;
1773
1774         s_treeBeingSorted = this;
1775         children.Sort(tree_ctrl_compare_func);
1776         s_treeBeingSorted = NULL;
1777     }
1778     //else: don't make the tree dirty as nothing changed
1779 }
1780
1781 wxImageList *wxGenericTreeCtrl::GetImageList() const
1782 {
1783     return m_imageListNormal;
1784 }
1785
1786 wxImageList *wxGenericTreeCtrl::GetButtonsImageList() const
1787 {
1788     return m_imageListButtons;
1789 }
1790
1791 wxImageList *wxGenericTreeCtrl::GetStateImageList() const
1792 {
1793     return m_imageListState;
1794 }
1795
1796 void wxGenericTreeCtrl::CalculateLineHeight()
1797 {
1798     wxClientDC dc(this);
1799     m_lineHeight = (int)(dc.GetCharHeight() + 4);
1800
1801     if ( m_imageListNormal )
1802     {
1803         // Calculate a m_lineHeight value from the normal Image sizes.
1804         // May be toggle off. Then wxGenericTreeCtrl will spread when
1805         // necessary (which might look ugly).
1806         int n = m_imageListNormal->GetImageCount();
1807         for (int i = 0; i < n ; i++)
1808         {
1809             int width = 0, height = 0;
1810             m_imageListNormal->GetSize(i, width, height);
1811             if (height > m_lineHeight) m_lineHeight = height;
1812         }
1813     }
1814
1815     if (m_imageListButtons)
1816     {
1817         // Calculate a m_lineHeight value from the Button image sizes.
1818         // May be toggle off. Then wxGenericTreeCtrl will spread when
1819         // necessary (which might look ugly).
1820         int n = m_imageListButtons->GetImageCount();
1821         for (int i = 0; i < n ; i++)
1822         {
1823             int width = 0, height = 0;
1824             m_imageListButtons->GetSize(i, width, height);
1825             if (height > m_lineHeight) m_lineHeight = height;
1826         }
1827     }
1828
1829     if (m_lineHeight < 30)
1830         m_lineHeight += 2;                 // at least 2 pixels
1831     else
1832         m_lineHeight += m_lineHeight/10;   // otherwise 10% extra spacing
1833 }
1834
1835 void wxGenericTreeCtrl::SetImageList(wxImageList *imageList)
1836 {
1837     if (m_ownsImageListNormal) delete m_imageListNormal;
1838     m_imageListNormal = imageList;
1839     m_ownsImageListNormal = FALSE;
1840     m_dirty = TRUE;
1841     CalculateLineHeight();
1842 }
1843
1844 void wxGenericTreeCtrl::SetStateImageList(wxImageList *imageList)
1845 {
1846     if (m_ownsImageListState) delete m_imageListState;
1847     m_imageListState = imageList;
1848     m_ownsImageListState = FALSE;
1849 }
1850
1851 void wxGenericTreeCtrl::SetButtonsImageList(wxImageList *imageList)
1852 {
1853     if (m_ownsImageListButtons) delete m_imageListButtons;
1854     m_imageListButtons = imageList;
1855     m_ownsImageListButtons = FALSE;
1856     m_dirty = TRUE;
1857     CalculateLineHeight();
1858 }
1859
1860 void wxGenericTreeCtrl::AssignImageList(wxImageList *imageList)
1861 {
1862     SetImageList(imageList);
1863     m_ownsImageListNormal = TRUE;
1864 }
1865
1866 void wxGenericTreeCtrl::AssignStateImageList(wxImageList *imageList)
1867 {
1868     SetStateImageList(imageList);
1869     m_ownsImageListState = TRUE;
1870 }
1871
1872 void wxGenericTreeCtrl::AssignButtonsImageList(wxImageList *imageList)
1873 {
1874     SetButtonsImageList(imageList);
1875     m_ownsImageListButtons = TRUE;
1876 }
1877
1878 // -----------------------------------------------------------------------------
1879 // helpers
1880 // -----------------------------------------------------------------------------
1881
1882 void wxGenericTreeCtrl::AdjustMyScrollbars()
1883 {
1884     if (m_anchor)
1885     {
1886         int x = 0, y = 0;
1887         m_anchor->GetSize( x, y, this );
1888         y += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1889         x += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1890         int x_pos = GetScrollPos( wxHORIZONTAL );
1891         int y_pos = GetScrollPos( wxVERTICAL );
1892         SetScrollbars( PIXELS_PER_UNIT, PIXELS_PER_UNIT, x/PIXELS_PER_UNIT, y/PIXELS_PER_UNIT, x_pos, y_pos );
1893     }
1894     else
1895     {
1896         SetScrollbars( 0, 0, 0, 0 );
1897     }
1898 }
1899
1900 int wxGenericTreeCtrl::GetLineHeight(wxGenericTreeItem *item) const
1901 {
1902     if (GetWindowStyleFlag() & wxTR_HAS_VARIABLE_ROW_HEIGHT)
1903         return item->GetHeight();
1904     else
1905         return m_lineHeight;
1906 }
1907
1908 void wxGenericTreeCtrl::PaintItem(wxGenericTreeItem *item, wxDC& dc)
1909 {
1910     // TODO implement "state" icon on items
1911
1912     wxTreeItemAttr *attr = item->GetAttributes();
1913     if ( attr && attr->HasFont() )
1914         dc.SetFont(attr->GetFont());
1915     else if (item->IsBold())
1916         dc.SetFont(m_boldFont);
1917
1918     long text_w = 0, text_h = 0;
1919     dc.GetTextExtent( item->GetText(), &text_w, &text_h );
1920
1921     int image_h = 0, image_w = 0;
1922     int image = item->GetCurrentImage();
1923     if ( image != NO_IMAGE )
1924     {
1925         if ( m_imageListNormal )
1926         {
1927             m_imageListNormal->GetSize( image, image_w, image_h );
1928             image_w += 4;
1929         }
1930         else
1931         {
1932             image = NO_IMAGE;
1933         }
1934     }
1935
1936     int total_h = GetLineHeight(item);
1937
1938     if ( item->IsSelected() )
1939     {
1940         dc.SetBrush(*(m_hasFocus ? m_hilightBrush : m_hilightUnfocusedBrush));
1941     }
1942     else
1943     {
1944         wxColour colBg;
1945         if ( attr && attr->HasBackgroundColour() )
1946             colBg = attr->GetBackgroundColour();
1947         else
1948             colBg = m_backgroundColour;
1949         dc.SetBrush(wxBrush(colBg, wxSOLID));
1950     }
1951
1952     int offset = HasFlag(wxTR_ROW_LINES) ? 1 : 0;
1953
1954     if ( HasFlag(wxTR_FULL_ROW_HIGHLIGHT) )
1955     {
1956         int x, y, w, h;
1957
1958         DoGetPosition(&x, &y);
1959         DoGetSize(&w, &h);
1960         dc.DrawRectangle(x, item->GetY()+offset, w, total_h-offset);
1961     }
1962     else
1963     {
1964         if ( item->IsSelected() && image != NO_IMAGE )
1965         {
1966             // If it's selected, and there's an image, then we should
1967             // take care to leave the area under the image painted in the
1968             // background colour.
1969             dc.DrawRectangle( item->GetX() + image_w - 2, item->GetY()+offset,
1970                               item->GetWidth() - image_w + 2, total_h-offset );
1971         }
1972         else
1973         {
1974             dc.DrawRectangle( item->GetX()-2, item->GetY()+offset,
1975                               item->GetWidth()+2, total_h-offset );
1976         }
1977     }
1978
1979     if ( image != NO_IMAGE )
1980     {
1981         dc.SetClippingRegion( item->GetX(), item->GetY(), image_w-2, total_h );
1982         m_imageListNormal->Draw( image, dc,
1983                                  item->GetX(),
1984                                  item->GetY() +((total_h > image_h)?((total_h-image_h)/2):0),
1985                                  wxIMAGELIST_DRAW_TRANSPARENT );
1986         dc.DestroyClippingRegion();
1987     }
1988
1989     dc.SetBackgroundMode(wxTRANSPARENT);
1990     int extraH = (total_h > text_h) ? (total_h - text_h)/2 : 0;
1991     dc.DrawText( item->GetText(),
1992                  (wxCoord)(image_w + item->GetX()),
1993                  (wxCoord)(item->GetY() + extraH));
1994
1995     // restore normal font
1996     dc.SetFont( m_normalFont );
1997 }
1998
1999 // Now y stands for the top of the item, whereas it used to stand for middle !
2000 void wxGenericTreeCtrl::PaintLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y )
2001 {
2002     int x = level*m_indent;
2003     if (!HasFlag(wxTR_HIDE_ROOT))
2004     {
2005         x += m_indent;
2006     }
2007     else if (level == 0)
2008     {
2009         // always expand hidden root
2010         int origY = y;
2011         wxArrayGenericTreeItems& children = item->GetChildren();
2012         int count = children.Count();
2013         if (count > 0)
2014         {
2015             int n = 0, oldY;
2016             do {
2017                 oldY = y;
2018                 PaintLevel(children[n], dc, 1, y);
2019             } while (++n < count);
2020
2021             if (!HasFlag(wxTR_NO_LINES) && HasFlag(wxTR_LINES_AT_ROOT) && count > 0)
2022             {
2023                 // draw line down to last child
2024                 origY += GetLineHeight(children[0])>>1;
2025                 oldY += GetLineHeight(children[n-1])>>1;
2026                 dc.DrawLine(3, origY, 3, oldY);
2027             }
2028         }
2029         return;
2030     }
2031
2032     item->SetX(x+m_spacing);
2033     item->SetY(y);
2034
2035     int h = GetLineHeight(item);
2036     int y_top = y;
2037     int y_mid = y_top + (h>>1);
2038     y += h;
2039
2040     int exposed_x = dc.LogicalToDeviceX(0);
2041     int exposed_y = dc.LogicalToDeviceY(y_top);
2042
2043     if (IsExposed(exposed_x, exposed_y, 10000, h))  // 10000 = very much
2044     {
2045         wxPen *pen =
2046 #ifndef __WXMAC__
2047             // don't draw rect outline if we already have the
2048             // background color under Mac
2049             (item->IsSelected() && m_hasFocus) ? wxBLACK_PEN :
2050 #endif // !__WXMAC__
2051             wxTRANSPARENT_PEN;
2052
2053         wxColour colText;
2054         if ( item->IsSelected() )
2055         {
2056             colText = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_HIGHLIGHTTEXT);
2057         }
2058         else
2059         {
2060             wxTreeItemAttr *attr = item->GetAttributes();
2061             if (attr && attr->HasTextColour())
2062                 colText = attr->GetTextColour();
2063             else
2064                 colText = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOWTEXT);
2065         }
2066
2067         // prepare to draw
2068         dc.SetTextForeground(colText);
2069         dc.SetPen(*pen);
2070
2071         // draw
2072         PaintItem(item, dc);
2073
2074         if (HasFlag(wxTR_ROW_LINES))
2075         {
2076             // if the background colour is white, choose a
2077             // contrasting color for the lines
2078             dc.SetPen(*((GetBackgroundColour() == *wxWHITE)
2079                          ? wxMEDIUM_GREY_PEN : wxWHITE_PEN));
2080             dc.DrawLine(0, y_top, 10000, y_top);
2081             dc.DrawLine(0, y, 10000, y);
2082         }
2083
2084         // restore DC objects
2085         dc.SetBrush(*wxWHITE_BRUSH);
2086         dc.SetPen(m_dottedPen);
2087         dc.SetTextForeground(*wxBLACK);
2088
2089         if (item->HasPlus() && HasButtons())  // should the item show a button?
2090         {
2091             if (!HasFlag(wxTR_NO_LINES))
2092             {
2093                 if (x > (signed)m_indent)
2094                     dc.DrawLine(x - m_indent, y_mid, x - 5, y_mid);
2095                 else if (HasFlag(wxTR_LINES_AT_ROOT))
2096                     dc.DrawLine(3, y_mid, x - 5, y_mid);
2097                 dc.DrawLine(x + 5, y_mid, x + m_spacing, y_mid);
2098             }
2099
2100             if (m_imageListButtons != NULL)
2101             {
2102                 // draw the image button here
2103                 int image_h = 0, image_w = 0, image = wxTreeItemIcon_Normal;
2104                 if (item->IsExpanded()) image = wxTreeItemIcon_Expanded;
2105                 if (item->IsSelected())
2106                     image += wxTreeItemIcon_Selected - wxTreeItemIcon_Normal;
2107                 m_imageListButtons->GetSize(image, image_w, image_h);
2108                 int xx = x - (image_w>>1);
2109                 int yy = y_mid - (image_h>>1);
2110                 dc.SetClippingRegion(xx, yy, image_w, image_h);
2111                 m_imageListButtons->Draw(image, dc, xx, yy,
2112                                          wxIMAGELIST_DRAW_TRANSPARENT);
2113                 dc.DestroyClippingRegion();
2114             }
2115             else if (HasFlag(wxTR_TWIST_BUTTONS))
2116             {
2117                 // draw the twisty button here
2118
2119                 if (HasFlag(wxTR_AQUA_BUTTONS))
2120                 {
2121                     if (item->IsExpanded())
2122                         dc.DrawBitmap( *m_arrowDown, x-5, y_mid-6, TRUE );
2123                     else
2124                         dc.DrawBitmap( *m_arrowRight, x-5, y_mid-6, TRUE );
2125                 }
2126                 else
2127                 {
2128                     dc.SetBrush(*m_hilightBrush);
2129                     dc.SetPen(*wxBLACK_PEN);
2130                     wxPoint button[3];
2131
2132                     if (item->IsExpanded())
2133                     {
2134                         button[0].x = x-5;
2135                         button[0].y = y_mid-2;
2136                         button[1].x = x+5;
2137                         button[1].y = y_mid-2;
2138                         button[2].x = x;
2139                         button[2].y = y_mid+3;
2140                     }
2141                     else
2142                     {
2143                         button[0].y = y_mid-5;
2144                         button[0].x = x-2;
2145                         button[1].y = y_mid+5;
2146                         button[1].x = x-2;
2147                         button[2].y = y_mid;
2148                         button[2].x = x+3;
2149                     }
2150                     dc.DrawPolygon(3, button);
2151                     dc.SetPen(m_dottedPen);
2152                 }
2153             }
2154             else // if (HasFlag(wxTR_HAS_BUTTONS))
2155             {
2156                 // draw the plus sign here
2157                 dc.SetPen(*wxGREY_PEN);
2158                 dc.SetBrush(*wxWHITE_BRUSH);
2159                 dc.DrawRectangle(x-5, y_mid-4, 11, 9);
2160                 dc.SetPen(*wxBLACK_PEN);
2161                 dc.DrawLine(x-2, y_mid, x+3, y_mid);
2162                 if (!item->IsExpanded())
2163                     dc.DrawLine(x, y_mid-2, x, y_mid+3);
2164                 dc.SetPen(m_dottedPen);
2165             }
2166         }
2167         else if (!HasFlag(wxTR_NO_LINES))  // no button; maybe a line?
2168         {
2169             // draw the horizontal line here
2170             int x_start = x;
2171             if (x > (signed)m_indent)
2172                 x_start -= m_indent;
2173             else if (HasFlag(wxTR_LINES_AT_ROOT))
2174                 x_start = 3;
2175             dc.DrawLine(x_start, y_mid, x + m_spacing, y_mid);
2176         }
2177     }
2178
2179     if (item->IsExpanded())
2180     {
2181         wxArrayGenericTreeItems& children = item->GetChildren();
2182         int count = children.Count();
2183         if (count > 0)
2184         {
2185             int n = 0, oldY;
2186             ++level;
2187             do {
2188                 oldY = y;
2189                 PaintLevel(children[n], dc, level, y);
2190             } while (++n < count);
2191
2192             if (!HasFlag(wxTR_NO_LINES) && count > 0)
2193             {
2194                 // draw line down to last child
2195                 oldY += GetLineHeight(children[n-1])>>1;
2196                 if (HasButtons()) y_mid += 5;
2197                 dc.DrawLine(x, y_mid, x, oldY);
2198             }
2199         }
2200     }
2201 }
2202
2203 void wxGenericTreeCtrl::DrawDropEffect(wxGenericTreeItem *item)
2204 {
2205     if ( item )
2206     {
2207         if ( item->HasPlus() )
2208         {
2209             // it's a folder, indicate it by a border
2210             DrawBorder(item);
2211         }
2212         else
2213         {
2214             // draw a line under the drop target because the item will be
2215             // dropped there
2216             DrawLine(item, TRUE /* below */);
2217         }
2218
2219         SetCursor(wxCURSOR_BULLSEYE);
2220     }
2221     else
2222     {
2223         // can't drop here
2224         SetCursor(wxCURSOR_NO_ENTRY);
2225     }
2226 }
2227
2228 void wxGenericTreeCtrl::DrawBorder(const wxTreeItemId &item)
2229 {
2230     wxCHECK_RET( item.IsOk(), _T("invalid item in wxGenericTreeCtrl::DrawLine") );
2231
2232     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
2233
2234     wxClientDC dc(this);
2235     PrepareDC( dc );
2236     dc.SetLogicalFunction(wxINVERT);
2237     dc.SetBrush(*wxTRANSPARENT_BRUSH);
2238
2239     int w = i->GetWidth() + 2;
2240     int h = GetLineHeight(i) + 2;
2241
2242     dc.DrawRectangle( i->GetX() - 1, i->GetY() - 1, w, h);
2243 }
2244
2245 void wxGenericTreeCtrl::DrawLine(const wxTreeItemId &item, bool below)
2246 {
2247     wxCHECK_RET( item.IsOk(), _T("invalid item in wxGenericTreeCtrl::DrawLine") );
2248
2249     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
2250
2251     wxClientDC dc(this);
2252     PrepareDC( dc );
2253     dc.SetLogicalFunction(wxINVERT);
2254
2255     int x = i->GetX(),
2256         y = i->GetY();
2257     if ( below )
2258     {
2259         y += GetLineHeight(i) - 1;
2260     }
2261
2262     dc.DrawLine( x, y, x + i->GetWidth(), y);
2263 }
2264
2265 // -----------------------------------------------------------------------------
2266 // wxWindows callbacks
2267 // -----------------------------------------------------------------------------
2268
2269 void wxGenericTreeCtrl::OnPaint( wxPaintEvent &WXUNUSED(event) )
2270 {
2271     wxPaintDC dc(this);
2272     PrepareDC( dc );
2273
2274     if ( !m_anchor)
2275         return;
2276
2277     dc.SetFont( m_normalFont );
2278     dc.SetPen( m_dottedPen );
2279
2280     // this is now done dynamically
2281     //if(GetImageList() == NULL)
2282     // m_lineHeight = (int)(dc.GetCharHeight() + 4);
2283
2284     int y = 2;
2285     PaintLevel( m_anchor, dc, 0, y );
2286 }
2287
2288 void wxGenericTreeCtrl::OnSetFocus( wxFocusEvent &event )
2289 {
2290     m_hasFocus = TRUE;
2291
2292     RefreshSelected();
2293
2294     event.Skip();
2295 }
2296
2297 void wxGenericTreeCtrl::OnKillFocus( wxFocusEvent &event )
2298 {
2299     m_hasFocus = FALSE;
2300
2301     RefreshSelected();
2302
2303     event.Skip();
2304 }
2305
2306 void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
2307 {
2308     wxTreeEvent te( wxEVT_COMMAND_TREE_KEY_DOWN, GetId() );
2309     te.m_evtKey = event;
2310     te.SetEventObject( this );
2311     if ( GetEventHandler()->ProcessEvent( te ) )
2312     {
2313         // intercepted by the user code
2314         return;
2315     }
2316
2317     if ( (m_current == 0) || (m_key_current == 0) )
2318     {
2319         event.Skip();
2320         return;
2321     }
2322
2323     // how should the selection work for this event?
2324     bool is_multiple, extended_select, unselect_others;
2325     EventFlagsToSelType(GetWindowStyleFlag(),
2326                         event.ShiftDown(),
2327                         event.ControlDown(),
2328                         is_multiple, extended_select, unselect_others);
2329
2330     // + : Expand
2331     // - : Collaspe
2332     // * : Expand all/Collapse all
2333     // ' ' | return : activate
2334     // up    : go up (not last children!)
2335     // down  : go down
2336     // left  : go to parent
2337     // right : open if parent and go next
2338     // home  : go to root
2339     // end   : go to last item without opening parents
2340     switch (event.KeyCode())
2341     {
2342         case '+':
2343         case WXK_ADD:
2344             if (m_current->HasPlus() && !IsExpanded(m_current))
2345             {
2346                 Expand(m_current);
2347             }
2348             break;
2349
2350         case '*':
2351         case WXK_MULTIPLY:
2352             if ( !IsExpanded(m_current) )
2353             {
2354                 // expand all
2355                 ExpandAll(m_current);
2356                 break;
2357             }
2358             //else: fall through to Collapse() it
2359
2360         case '-':
2361         case WXK_SUBTRACT:
2362             if (IsExpanded(m_current))
2363             {
2364                 Collapse(m_current);
2365             }
2366             break;
2367
2368         case ' ':
2369         case WXK_RETURN:
2370             {
2371                 wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_ACTIVATED, GetId() );
2372                 event.m_item = (long) m_current;
2373                 event.SetEventObject( this );
2374                 GetEventHandler()->ProcessEvent( event );
2375             }
2376             break;
2377
2378             // up goes to the previous sibling or to the last
2379             // of its children if it's expanded
2380         case WXK_UP:
2381             {
2382                 wxTreeItemId prev = GetPrevSibling( m_key_current );
2383                 if (!prev)
2384                 {
2385                     prev = GetParent( m_key_current );
2386                     if ((prev == GetRootItem()) && HasFlag(wxTR_HIDE_ROOT))
2387                     {
2388                         break;  // don't go to root if it is hidden
2389                     }
2390                     if (prev)
2391                     {
2392                         long cookie = 0;
2393                         wxTreeItemId current = m_key_current;
2394                         // TODO: Huh?  If we get here, we'd better be the first child of our parent.  How else could it be?
2395                         if (current == GetFirstChild( prev, cookie ))
2396                         {
2397                             // otherwise we return to where we came from
2398                             SelectItem( prev, unselect_others, extended_select );
2399                             m_key_current= (wxGenericTreeItem*) prev.m_pItem;
2400                             EnsureVisible( prev );
2401                             break;
2402                         }
2403                     }
2404                 }
2405                 if (prev)
2406                 {
2407                     while ( IsExpanded(prev) && HasChildren(prev) )
2408                     {
2409                         wxTreeItemId child = GetLastChild(prev);
2410                         if ( child )
2411                         {
2412                             prev = child;
2413                         }
2414                     }
2415
2416                     SelectItem( prev, unselect_others, extended_select );
2417                     m_key_current=(wxGenericTreeItem*) prev.m_pItem;
2418                     EnsureVisible( prev );
2419                 }
2420             }
2421             break;
2422
2423             // left arrow goes to the parent
2424         case WXK_LEFT:
2425             {
2426                 wxTreeItemId prev = GetParent( m_current );
2427                 if ((prev == GetRootItem()) && HasFlag(wxTR_HIDE_ROOT))
2428                 {
2429                     // don't go to root if it is hidden
2430                     prev = GetPrevSibling( m_current );
2431                 }
2432                 if (prev)
2433                 {
2434                     EnsureVisible( prev );
2435                     SelectItem( prev, unselect_others, extended_select );
2436                 }
2437             }
2438             break;
2439
2440         case WXK_RIGHT:
2441             // this works the same as the down arrow except that we
2442             // also expand the item if it wasn't expanded yet
2443             Expand(m_current);
2444             // fall through
2445
2446         case WXK_DOWN:
2447             {
2448                 if (IsExpanded(m_key_current) && HasChildren(m_key_current))
2449                 {
2450                     long cookie = 0;
2451                     wxTreeItemId child = GetFirstChild( m_key_current, cookie );
2452                     SelectItem( child, unselect_others, extended_select );
2453                     m_key_current=(wxGenericTreeItem*) child.m_pItem;
2454                     EnsureVisible( child );
2455                 }
2456                 else
2457                 {
2458                     wxTreeItemId next = GetNextSibling( m_key_current );
2459                     if (!next)
2460                     {
2461                         wxTreeItemId current = m_key_current;
2462                         while (current && !next)
2463                         {
2464                             current = GetParent( current );
2465                             if (current) next = GetNextSibling( current );
2466                         }
2467                     }
2468                     if (next)
2469                     {
2470                         SelectItem( next, unselect_others, extended_select );
2471                         m_key_current=(wxGenericTreeItem*) next.m_pItem;
2472                         EnsureVisible( next );
2473                     }
2474                 }
2475             }
2476             break;
2477
2478             // <End> selects the last visible tree item
2479         case WXK_END:
2480             {
2481                 wxTreeItemId last = GetRootItem();
2482
2483                 while ( last.IsOk() && IsExpanded(last) )
2484                 {
2485                     wxTreeItemId lastChild = GetLastChild(last);
2486
2487                     // it may happen if the item was expanded but then all of
2488                     // its children have been deleted - so IsExpanded() returned
2489                     // TRUE, but GetLastChild() returned invalid item
2490                     if ( !lastChild )
2491                         break;
2492
2493                     last = lastChild;
2494                 }
2495
2496                 if ( last.IsOk() )
2497                 {
2498                     EnsureVisible( last );
2499                     SelectItem( last, unselect_others, extended_select );
2500                 }
2501             }
2502             break;
2503
2504             // <Home> selects the root item
2505         case WXK_HOME:
2506             {
2507                 wxTreeItemId prev = GetRootItem();
2508                 if (!prev) break;
2509                 if (HasFlag(wxTR_HIDE_ROOT))
2510                 {
2511                     long dummy;
2512                     prev = GetFirstChild(prev, dummy);
2513                     if (!prev) break;
2514                 }
2515                 EnsureVisible( prev );
2516                 SelectItem( prev, unselect_others, extended_select );
2517             }
2518             break;
2519
2520         default:
2521             event.Skip();
2522     }
2523 }
2524
2525 wxTreeItemId wxGenericTreeCtrl::HitTest(const wxPoint& point, int& flags)
2526 {
2527     // JACS: removed wxYieldIfNeeded() because it can cause the window
2528     // to be deleted from under us if a close window event is pending
2529
2530     int w, h;
2531     GetSize(&w, &h);
2532     flags=0;
2533     if (point.x<0) flags |= wxTREE_HITTEST_TOLEFT;
2534     if (point.x>w) flags |= wxTREE_HITTEST_TORIGHT;
2535     if (point.y<0) flags |= wxTREE_HITTEST_ABOVE;
2536     if (point.y>h) flags |= wxTREE_HITTEST_BELOW;
2537     if (flags) return wxTreeItemId();
2538
2539     if (m_anchor == NULL)
2540     {
2541         flags = wxTREE_HITTEST_NOWHERE;
2542         return wxTreeItemId();
2543     }
2544
2545     wxClientDC dc(this);
2546     PrepareDC(dc);
2547     wxCoord x = dc.DeviceToLogicalX( point.x );
2548     wxCoord y = dc.DeviceToLogicalY( point.y );
2549     wxGenericTreeItem *hit =  m_anchor->HitTest(wxPoint(x, y),
2550                                                 this,
2551                                                 flags,
2552                                                 0 );
2553     if (hit == NULL)
2554     {
2555         flags = wxTREE_HITTEST_NOWHERE;
2556         return wxTreeItemId();
2557     }
2558     return hit;
2559 }
2560
2561 // get the bounding rectangle of the item (or of its label only)
2562 bool wxGenericTreeCtrl::GetBoundingRect(const wxTreeItemId& item,
2563                          wxRect& rect,
2564                          bool WXUNUSED(textOnly)) const
2565 {
2566     wxCHECK_MSG( item.IsOk(), FALSE, _T("invalid item in wxGenericTreeCtrl::GetBoundingRect") );
2567
2568     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
2569
2570     int startX, startY;
2571     GetViewStart(& startX, & startY);
2572
2573     rect.x = i->GetX() - startX*PIXELS_PER_UNIT;
2574     rect.y = i->GetY() - startY*PIXELS_PER_UNIT;
2575     rect.width = i->GetWidth();
2576     //rect.height = i->GetHeight();
2577     rect.height = GetLineHeight(i);
2578
2579     return TRUE;
2580 }
2581
2582 /* **** */
2583
2584 void wxGenericTreeCtrl::Edit( const wxTreeItemId& item )
2585 {
2586     if (!item.IsOk()) return;
2587
2588     m_currentEdit = (wxGenericTreeItem*) item.m_pItem;
2589
2590     wxTreeEvent te( wxEVT_COMMAND_TREE_BEGIN_LABEL_EDIT, GetId() );
2591     te.m_item = (long) m_currentEdit;
2592     te.SetEventObject( this );
2593     GetEventHandler()->ProcessEvent( te );
2594
2595     if (!te.IsAllowed()) return;
2596
2597     // We have to call this here because the label in
2598     // question might just have been added and no screen
2599     // update taken place.
2600     if (m_dirty) wxYieldIfNeeded();
2601
2602     wxString s = m_currentEdit->GetText();
2603     int x = m_currentEdit->GetX();
2604     int y = m_currentEdit->GetY();
2605     int w = m_currentEdit->GetWidth();
2606     int h = m_currentEdit->GetHeight();
2607
2608     int image_h = 0;
2609     int image_w = 0;
2610
2611     int image = m_currentEdit->GetCurrentImage();
2612     if ( image != NO_IMAGE )
2613     {
2614         if ( m_imageListNormal )
2615         {
2616             m_imageListNormal->GetSize( image, image_w, image_h );
2617             image_w += 4;
2618         }
2619         else
2620         {
2621             wxFAIL_MSG(_T("you must create an image list to use images!"));
2622         }
2623     }
2624     x += image_w;
2625     w -= image_w + 4; // I don't know why +4 is needed
2626
2627     wxClientDC dc(this);
2628     PrepareDC( dc );
2629     x = dc.LogicalToDeviceX( x );
2630     y = dc.LogicalToDeviceY( y );
2631
2632     wxTreeTextCtrl *text = new wxTreeTextCtrl(this, -1,
2633                                               &m_renameAccept,
2634                                               &m_renameRes,
2635                                               this,
2636                                               s,
2637                                               wxPoint(x-4,y-4),
2638                                               wxSize(w+11,h+8));
2639     text->SetFocus();
2640 }
2641
2642 void wxGenericTreeCtrl::OnRenameTimer()
2643 {
2644     Edit( m_current );
2645 }
2646
2647 void wxGenericTreeCtrl::OnRenameAccept()
2648 {
2649     // TODO if the validator fails this causes a crash
2650     wxTreeEvent le( wxEVT_COMMAND_TREE_END_LABEL_EDIT, GetId() );
2651     le.m_item = (long) m_currentEdit;
2652     le.SetEventObject( this );
2653     le.m_label = m_renameRes;
2654     GetEventHandler()->ProcessEvent( le );
2655
2656     if (!le.IsAllowed()) return;
2657
2658     SetItemText( m_currentEdit, m_renameRes );
2659 }
2660
2661 void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
2662 {
2663     if ( !m_anchor ) return;
2664
2665     // we process left mouse up event (enables in-place edit), right down
2666     // (pass to the user code), left dbl click (activate item) and
2667     // dragging/moving events for items drag-and-drop
2668     if ( !(event.LeftDown() ||
2669            event.LeftUp() ||
2670            event.RightDown() ||
2671            event.LeftDClick() ||
2672            event.Dragging() ||
2673            ((event.Moving() || event.RightUp()) && m_isDragging)) )
2674     {
2675         event.Skip();
2676
2677         return;
2678     }
2679
2680     wxClientDC dc(this);
2681     PrepareDC(dc);
2682     wxCoord x = dc.DeviceToLogicalX( event.GetX() );
2683     wxCoord y = dc.DeviceToLogicalY( event.GetY() );
2684
2685     int flags = 0;
2686     wxGenericTreeItem *item = m_anchor->HitTest( wxPoint(x,y),
2687                                                  this,
2688                                                  flags,
2689                                                  0 );
2690
2691     if ( event.Dragging() && !m_isDragging )
2692     {
2693         if (m_dragCount == 0)
2694             m_dragStart = wxPoint(x,y);
2695
2696         m_dragCount++;
2697
2698         if (m_dragCount != 3)
2699         {
2700             // wait until user drags a bit further...
2701             return;
2702         }
2703
2704         wxEventType command = event.RightIsDown()
2705                               ? wxEVT_COMMAND_TREE_BEGIN_RDRAG
2706                               : wxEVT_COMMAND_TREE_BEGIN_DRAG;
2707
2708         wxTreeEvent nevent( command, GetId() );
2709         nevent.m_item = (long) m_current;
2710         nevent.SetEventObject(this);
2711
2712         // by default the dragging is not supported, the user code must
2713         // explicitly allow the event for it to take place
2714         nevent.Veto();
2715
2716         if ( GetEventHandler()->ProcessEvent(nevent) && nevent.IsAllowed() )
2717         {
2718             // we're going to drag this item
2719             m_isDragging = TRUE;
2720
2721             // remember the old cursor because we will change it while
2722             // dragging
2723             m_oldCursor = m_cursor;
2724
2725             // in a single selection control, hide the selection temporarily
2726             if ( !(GetWindowStyleFlag() & wxTR_MULTIPLE) )
2727             {
2728                 m_oldSelection = (wxGenericTreeItem*) GetSelection().m_pItem;
2729
2730                 if ( m_oldSelection )
2731                 {
2732                     m_oldSelection->SetHilight(FALSE);
2733                     RefreshLine(m_oldSelection);
2734                 }
2735             }
2736
2737             CaptureMouse();
2738         }
2739     }
2740     else if ( event.Moving() )
2741     {
2742         if ( item != m_dropTarget )
2743         {
2744             // unhighlight the previous drop target
2745             DrawDropEffect(m_dropTarget);
2746
2747             m_dropTarget = item;
2748
2749             // highlight the current drop target if any
2750             DrawDropEffect(m_dropTarget);
2751
2752             wxYieldIfNeeded();
2753         }
2754     }
2755     else if ( (event.LeftUp() || event.RightUp()) && m_isDragging )
2756     {
2757         // erase the highlighting
2758         DrawDropEffect(m_dropTarget);
2759
2760         if ( m_oldSelection )
2761         {
2762             m_oldSelection->SetHilight(TRUE);
2763             RefreshLine(m_oldSelection);
2764             m_oldSelection = (wxGenericTreeItem *)NULL;
2765         }
2766
2767         // generate the drag end event
2768         wxTreeEvent event(wxEVT_COMMAND_TREE_END_DRAG, GetId());
2769
2770         event.m_item = (long) item;
2771         event.m_pointDrag = wxPoint(x, y);
2772         event.SetEventObject(this);
2773
2774         (void)GetEventHandler()->ProcessEvent(event);
2775
2776         m_isDragging = FALSE;
2777         m_dropTarget = (wxGenericTreeItem *)NULL;
2778
2779         ReleaseMouse();
2780
2781         SetCursor(m_oldCursor);
2782
2783         wxYieldIfNeeded();
2784     }
2785     else
2786     {
2787         // here we process only the messages which happen on tree items
2788
2789         m_dragCount = 0;
2790
2791         if (item == NULL) return;  /* we hit the blank area */
2792
2793         if ( event.RightDown() )
2794         {
2795             wxTreeEvent nevent(wxEVT_COMMAND_TREE_ITEM_RIGHT_CLICK, GetId());
2796             nevent.m_item = (long) item;
2797             CalcScrolledPosition(x, y,
2798                                  &nevent.m_pointDrag.x,
2799                                  &nevent.m_pointDrag.y);
2800             nevent.SetEventObject(this);
2801             GetEventHandler()->ProcessEvent(nevent);
2802         }
2803         else if ( event.LeftUp() )
2804         {
2805             if ( m_lastOnSame )
2806             {
2807                 if ( (item == m_current) &&
2808                      (flags & wxTREE_HITTEST_ONITEMLABEL) &&
2809                      HasFlag(wxTR_EDIT_LABELS) )
2810                 {
2811                     if ( m_renameTimer->IsRunning() )
2812                         m_renameTimer->Stop();
2813
2814                     m_renameTimer->Start( 100, TRUE );
2815                 }
2816
2817                 m_lastOnSame = FALSE;
2818             }
2819         }
2820         else // !RightDown() && !LeftUp() ==> LeftDown() || LeftDClick()
2821         {
2822             if ( event.LeftDown() )
2823             {
2824                 m_lastOnSame = item == m_current;
2825             }
2826
2827             if ( flags & wxTREE_HITTEST_ONITEMBUTTON )
2828             {
2829                 // only toggle the item for a single click, double click on
2830                 // the button doesn't do anything (it toggles the item twice)
2831                 if ( event.LeftDown() )
2832                 {
2833                     Toggle( item );
2834                 }
2835
2836                 // don't select the item if the button was clicked
2837                 return;
2838             }
2839
2840             // how should the selection work for this event?
2841             bool is_multiple, extended_select, unselect_others;
2842             EventFlagsToSelType(GetWindowStyleFlag(),
2843                                 event.ShiftDown(),
2844                                 event.ControlDown(),
2845                                 is_multiple, extended_select, unselect_others);
2846
2847             SelectItem(item, unselect_others, extended_select);
2848
2849             // For some reason, Windows isn't recognizing a left double-click,
2850             // so we need to simulate it here.  Allow 200 milliseconds for now.
2851             if ( event.LeftDClick() )
2852             {
2853                 // double clicking should not start editing the item label
2854                 m_renameTimer->Stop();
2855                 m_lastOnSame = FALSE;
2856
2857                 // send activate event first
2858                 wxTreeEvent nevent( wxEVT_COMMAND_TREE_ITEM_ACTIVATED, GetId() );
2859                 nevent.m_item = (long) item;
2860                 CalcScrolledPosition(x, y,
2861                                      &nevent.m_pointDrag.x,
2862                                      &nevent.m_pointDrag.y);
2863                 nevent.SetEventObject( this );
2864                 if ( !GetEventHandler()->ProcessEvent( nevent ) )
2865                 {
2866                     // if the user code didn't process the activate event,
2867                     // handle it ourselves by toggling the item when it is
2868                     // double clicked
2869                     if ( item->HasPlus() )
2870                     {
2871                         Toggle(item);
2872                     }
2873                 }
2874             }
2875         }
2876     }
2877 }
2878
2879 void wxGenericTreeCtrl::OnIdle( wxIdleEvent &WXUNUSED(event) )
2880 {
2881     /* after all changes have been done to the tree control,
2882      * we actually redraw the tree when everything is over */
2883
2884     if (!m_dirty) return;
2885
2886     m_dirty = FALSE;
2887
2888     CalculatePositions();
2889     Refresh();
2890     AdjustMyScrollbars();
2891 }
2892
2893 void wxGenericTreeCtrl::CalculateSize( wxGenericTreeItem *item, wxDC &dc )
2894 {
2895     wxCoord text_w = 0;
2896     wxCoord text_h = 0;
2897
2898     if (item->IsBold())
2899         dc.SetFont(m_boldFont);
2900
2901     dc.GetTextExtent( item->GetText(), &text_w, &text_h );
2902     text_h+=2;
2903
2904     // restore normal font
2905     dc.SetFont( m_normalFont );
2906
2907     int image_h = 0;
2908     int image_w = 0;
2909     int image = item->GetCurrentImage();
2910     if ( image != NO_IMAGE )
2911     {
2912         if ( m_imageListNormal )
2913         {
2914             m_imageListNormal->GetSize( image, image_w, image_h );
2915             image_w += 4;
2916         }
2917     }
2918
2919     int total_h = (image_h > text_h) ? image_h : text_h;
2920
2921     if (total_h < 30)
2922         total_h += 2;            // at least 2 pixels
2923     else
2924         total_h += total_h/10;   // otherwise 10% extra spacing
2925
2926     item->SetHeight(total_h);
2927     if (total_h>m_lineHeight)
2928         m_lineHeight=total_h;
2929
2930     item->SetWidth(image_w+text_w+2);
2931 }
2932
2933 // -----------------------------------------------------------------------------
2934 // for developper : y is now the top of the level
2935 // not the middle of it !
2936 void wxGenericTreeCtrl::CalculateLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y )
2937 {
2938     int x = level*m_indent;
2939     if (!HasFlag(wxTR_HIDE_ROOT))
2940     {
2941         x += m_indent;
2942     }
2943     else if (level == 0)
2944     {
2945         // a hidden root is not evaluated, but its
2946         // children are always calculated
2947         goto Recurse;
2948     }
2949
2950     CalculateSize( item, dc );
2951
2952     // set its position
2953     item->SetX( x+m_spacing );
2954     item->SetY( y );
2955     y += GetLineHeight(item);
2956
2957     if ( !item->IsExpanded() )
2958     {
2959         // we don't need to calculate collapsed branches
2960         return;
2961     }
2962
2963   Recurse:
2964     wxArrayGenericTreeItems& children = item->GetChildren();
2965     size_t n, count = children.Count();
2966     ++level;
2967     for (n = 0; n < count; ++n )
2968         CalculateLevel( children[n], dc, level, y );  // recurse
2969 }
2970
2971 void wxGenericTreeCtrl::CalculatePositions()
2972 {
2973     if ( !m_anchor ) return;
2974
2975     wxClientDC dc(this);
2976     PrepareDC( dc );
2977
2978     dc.SetFont( m_normalFont );
2979
2980     dc.SetPen( m_dottedPen );
2981     //if(GetImageList() == NULL)
2982     // m_lineHeight = (int)(dc.GetCharHeight() + 4);
2983
2984     int y = 2;
2985     CalculateLevel( m_anchor, dc, 0, y ); // start recursion
2986 }
2987
2988 void wxGenericTreeCtrl::RefreshSubtree(wxGenericTreeItem *item)
2989 {
2990     if (m_dirty) return;
2991
2992     wxClientDC dc(this);
2993     PrepareDC(dc);
2994
2995     int cw = 0;
2996     int ch = 0;
2997     GetClientSize( &cw, &ch );
2998
2999     wxRect rect;
3000     rect.x = dc.LogicalToDeviceX( 0 );
3001     rect.width = cw;
3002     rect.y = dc.LogicalToDeviceY( item->GetY() );
3003     rect.height = ch;
3004
3005     Refresh( TRUE, &rect );
3006
3007     AdjustMyScrollbars();
3008 }
3009
3010 void wxGenericTreeCtrl::RefreshLine( wxGenericTreeItem *item )
3011 {
3012     if (m_dirty) return;
3013
3014     wxClientDC dc(this);
3015     PrepareDC( dc );
3016
3017     int cw = 0;
3018     int ch = 0;
3019     GetClientSize( &cw, &ch );
3020
3021     wxRect rect;
3022     rect.x = dc.LogicalToDeviceX( 0 );
3023     rect.y = dc.LogicalToDeviceY( item->GetY() );
3024     rect.width = cw;
3025     rect.height = GetLineHeight(item); //dc.GetCharHeight() + 6;
3026
3027     Refresh( TRUE, &rect );
3028 }
3029
3030 void wxGenericTreeCtrl::RefreshSelected()
3031 {
3032     // TODO: this is awfully inefficient, we should keep the list of all
3033     //       selected items internally, should be much faster
3034     if ( m_anchor )
3035         RefreshSelectedUnder(m_anchor);
3036 }
3037
3038 void wxGenericTreeCtrl::RefreshSelectedUnder(wxGenericTreeItem *item)
3039 {
3040     if ( item->IsSelected() )
3041         RefreshLine(item);
3042
3043     const wxArrayGenericTreeItems& children = item->GetChildren();
3044     size_t count = children.GetCount();
3045     for ( size_t n = 0; n < count; n++ )
3046     {
3047         RefreshSelectedUnder(children[n]);
3048     }
3049 }
3050
3051 // ----------------------------------------------------------------------------
3052 // changing colours: we need to refresh the tree control
3053 // ----------------------------------------------------------------------------
3054
3055 bool wxGenericTreeCtrl::SetBackgroundColour(const wxColour& colour)
3056 {
3057     if ( !wxWindow::SetBackgroundColour(colour) )
3058         return FALSE;
3059
3060     Refresh();
3061
3062     return TRUE;
3063 }
3064
3065 bool wxGenericTreeCtrl::SetForegroundColour(const wxColour& colour)
3066 {
3067     if ( !wxWindow::SetForegroundColour(colour) )
3068         return FALSE;
3069
3070     Refresh();
3071
3072     return TRUE;
3073 }
3074
3075 #endif // wxUSE_TREECTRL