src/generic/treectlg.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        treectlg.cpp
   3 // Purpose:     generic tree control implementation
   4 // Author:      Robert Roebling
   5 // Created:     01/02/97
   6 // Modified:    22/10/98 - almost total rewrite, simpler interface (VZ)
   7 // Id:          $Id$
   8 // Copyright:   (c) 1998 Robert Roebling, Julian Smart and Markus Holzem
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // =============================================================================
  13 // declarations
  14 // =============================================================================
  15
  16 // -----------------------------------------------------------------------------
  17 // headers
  18 // -----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21   #pragma implementation "treectlg.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #if wxUSE_TREECTRL
  32
  33 #include "wx/treebase.h"
  34 #include "wx/generic/treectlg.h"
  35 #include "wx/timer.h"
  36 #include "wx/textctrl.h"
  37 #include "wx/imaglist.h"
  38 #include "wx/settings.h"
  39 #include "wx/dcclient.h"
  40
  41 // -----------------------------------------------------------------------------
  42 // array types
  43 // -----------------------------------------------------------------------------
  44
  45 class WXDLLEXPORT wxGenericTreeItem;
  46
  47 WX_DEFINE_EXPORTED_ARRAY(wxGenericTreeItem *, wxArrayGenericTreeItems);
  48 //WX_DEFINE_OBJARRAY(wxArrayTreeItemIds);
  49
  50 // ----------------------------------------------------------------------------
  51 // constants
  52 // ----------------------------------------------------------------------------
  53
  54 static const int NO_IMAGE = -1;
  55
  56 #define PIXELS_PER_UNIT 10
  57
  58 // -----------------------------------------------------------------------------
  59 // private classes
  60 // -----------------------------------------------------------------------------
  61
  62 // timer used for enabling in-place edit
  63 class WXDLLEXPORT wxTreeRenameTimer: public wxTimer
  64 {
  65 public:
  66     wxTreeRenameTimer( wxGenericTreeCtrl *owner );
  67
  68     void Notify();
  69
  70 private:
  71     wxGenericTreeCtrl   *m_owner;
  72 };
  73
  74 // control used for in-place edit
  75 class WXDLLEXPORT wxTreeTextCtrl: public wxTextCtrl
  76 {
  77 public:
  78     wxTreeTextCtrl( wxWindow *parent,
  79                     const wxWindowID id,
  80                     bool *accept,
  81                     wxString *res,
  82                     wxGenericTreeCtrl *owner,
  83                     const wxString &value = wxEmptyString,
  84                     const wxPoint &pos = wxDefaultPosition,
  85                     const wxSize &size = wxDefaultSize,
  86                     int style = wxSIMPLE_BORDER,
  87                     const wxValidator& validator = wxDefaultValidator,
  88                     const wxString &name = wxTextCtrlNameStr );
  89
  90     void OnChar( wxKeyEvent &event );
  91     void OnKeyUp( wxKeyEvent &event );
  92     void OnKillFocus( wxFocusEvent &event );
  93
  94 private:
  95     bool               *m_accept;
  96     wxString           *m_res;
  97     wxGenericTreeCtrl  *m_owner;
  98     wxString            m_startValue;
  99
 100     DECLARE_EVENT_TABLE()
 101 };
 102
 103 // a tree item
 104 class WXDLLEXPORT wxGenericTreeItem
 105 {
 106 public:
 107     // ctors & dtor
 108     wxGenericTreeItem() { m_data = NULL; }
 109     wxGenericTreeItem( wxGenericTreeItem *parent,
 110                        const wxString& text,
 111                        wxDC& dc,
 112                        int image,
 113                        int selImage,
 114                        wxTreeItemData *data );
 115
 116     ~wxGenericTreeItem();
 117
 118     // trivial accessors
 119     wxArrayGenericTreeItems& GetChildren() { return m_children; }
 120
 121     const wxString& GetText() const { return m_text; }
 122     int GetImage(wxTreeItemIcon which = wxTreeItemIcon_Normal) const
 123         { return m_images[which]; }
 124     wxTreeItemData *GetData() const { return m_data; }
 125
 126     // returns the current image for the item (depending on its
 127     // selected/expanded/whatever state)
 128     int GetCurrentImage() const;
 129
 130     void SetText( const wxString &text );
 131     void SetImage(int image, wxTreeItemIcon which) { m_images[which] = image; }
 132     void SetData(wxTreeItemData *data) { m_data = data; }
 133
 134     void SetHasPlus(bool has = TRUE) { m_hasPlus = has; }
 135
 136     void SetBold(bool bold) { m_isBold = bold; }
 137
 138     int GetX() const { return m_x; }
 139     int GetY() const { return m_y; }
 140
 141     void SetX(int x) { m_x = x; }
 142     void SetY(int y) { m_y = y; }
 143
 144     int  GetHeight() const { return m_height; }
 145     int  GetWidth()  const { return m_width; }
 146
 147     void SetHeight(int h) { m_height = h; }
 148     void SetWidth(int w) { m_width = w; }
 149
 150     wxGenericTreeItem *GetParent() const { return m_parent; }
 151
 152     // operations
 153         // deletes all children notifying the treectrl about it if !NULL
 154         // pointer given
 155     void DeleteChildren(wxGenericTreeCtrl *tree = NULL);
 156
 157     // get count of all children (and grand children if 'recursively')
 158     size_t GetChildrenCount(bool recursively = TRUE) const;
 159
 160     void Insert(wxGenericTreeItem *child, size_t index)
 161     { m_children.Insert(child, index); }
 162
 163     void GetSize( int &x, int &y, const wxGenericTreeCtrl* );
 164
 165         // return the item at given position (or NULL if no item), onButton is
 166         // TRUE if the point belongs to the item's button, otherwise it lies
 167         // on the button's label
 168     wxGenericTreeItem *HitTest( const wxPoint& point,
 169                                 const wxGenericTreeCtrl *,
 170                                 int &flags,
 171                                 int level );
 172
 173     void Expand() { m_isCollapsed = FALSE; }
 174     void Collapse() { m_isCollapsed = TRUE; }
 175
 176     void SetHilight( bool set = TRUE ) { m_hasHilight = set; }
 177
 178     // status inquiries
 179     bool HasChildren() const { return !m_children.IsEmpty(); }
 180     bool IsSelected()  const { return m_hasHilight != 0; }
 181     bool IsExpanded()  const { return !m_isCollapsed; }
 182     bool HasPlus()     const { return m_hasPlus || HasChildren(); }
 183     bool IsBold()      const { return m_isBold != 0; }
 184
 185     // attributes
 186         // get them - may be NULL
 187     wxTreeItemAttr *GetAttributes() const { return m_attr; }
 188         // get them ensuring that the pointer is not NULL
 189     wxTreeItemAttr& Attr()
 190     {
 191         if ( !m_attr )
 192         {
 193             m_attr = new wxTreeItemAttr;
 194             m_ownsAttr = TRUE;
 195         }
 196         return *m_attr;
 197     }
 198         // set them
 199     void SetAttributes(wxTreeItemAttr *attr)
 200     {
 201         if ( m_ownsAttr ) delete m_attr;
 202         m_attr = attr;
 203         m_ownsAttr = FALSE;
 204     }
 205         // set them and delete when done
 206     void AssignAttributes(wxTreeItemAttr *attr)
 207     {
 208         SetAttributes(attr);
 209         m_ownsAttr = TRUE;
 210     }
 211
 212 private:
 213     // since there can be very many of these, we save size by chosing
 214     // the smallest representation for the elements and by ordering
 215     // the members to avoid padding.
 216     wxString            m_text;         // label to be rendered for item
 217
 218     wxTreeItemData     *m_data;         // user-provided data
 219
 220     wxArrayGenericTreeItems m_children; // list of children
 221     wxGenericTreeItem  *m_parent;       // parent of this item
 222
 223     wxTreeItemAttr     *m_attr;         // attributes???
 224
 225     // tree ctrl images for the normal, selected, expanded and
 226     // expanded+selected states
 227     short               m_images[wxTreeItemIcon_Max];
 228
 229     wxCoord             m_x;            // (virtual) offset from top
 230     short               m_y;            // (virtual) offset from left
 231     short               m_width;        // width of this item
 232     unsigned char       m_height;       // height of this item
 233
 234     // use bitfields to save size
 235     int                 m_isCollapsed :1;
 236     int                 m_hasHilight  :1; // same as focused
 237     int                 m_hasPlus     :1; // used for item which doesn't have
 238                                           // children but has a [+] button
 239     int                 m_isBold      :1; // render the label in bold font
 240     int                 m_ownsAttr    :1; // delete attribute when done
 241 };
 242
 243 // =============================================================================
 244 // implementation
 245 // =============================================================================
 246
 247 // ----------------------------------------------------------------------------
 248 // private functions
 249 // ----------------------------------------------------------------------------
 250
 251 // translate the key or mouse event flags to the type of selection we're
 252 // dealing with
 253 static void EventFlagsToSelType(long style,
 254                                 bool shiftDown,
 255                                 bool ctrlDown,
 256                                 bool &is_multiple,
 257                                 bool &extended_select,
 258                                 bool &unselect_others)
 259 {
 260     is_multiple = (style & wxTR_MULTIPLE) != 0;
 261     extended_select = shiftDown && is_multiple;
 262     unselect_others = !(extended_select || (ctrlDown && is_multiple));
 263 }
 264
 265 // -----------------------------------------------------------------------------
 266 // wxTreeRenameTimer (internal)
 267 // -----------------------------------------------------------------------------
 268
 269 wxTreeRenameTimer::wxTreeRenameTimer( wxGenericTreeCtrl *owner )
 270 {
 271     m_owner = owner;
 272 }
 273
 274 void wxTreeRenameTimer::Notify()
 275 {
 276     m_owner->OnRenameTimer();
 277 }
 278
 279 //-----------------------------------------------------------------------------
 280 // wxTreeTextCtrl (internal)
 281 //-----------------------------------------------------------------------------
 282
 283 BEGIN_EVENT_TABLE(wxTreeTextCtrl,wxTextCtrl)
 284     EVT_CHAR           (wxTreeTextCtrl::OnChar)
 285     EVT_KEY_UP         (wxTreeTextCtrl::OnKeyUp)
 286     EVT_KILL_FOCUS     (wxTreeTextCtrl::OnKillFocus)
 287 END_EVENT_TABLE()
 288
 289 wxTreeTextCtrl::wxTreeTextCtrl( wxWindow *parent,
 290                                 const wxWindowID id,
 291                                 bool *accept,
 292                                 wxString *res,
 293                                 wxGenericTreeCtrl *owner,
 294                                 const wxString &value,
 295                                 const wxPoint &pos,
 296                                 const wxSize &size,
 297                                 int style,
 298                                 const wxValidator& validator,
 299                                 const wxString &name )
 300     : wxTextCtrl( parent, id, value, pos, size, style, validator, name )
 301 {
 302     m_res = res;
 303     m_accept = accept;
 304     m_owner = owner;
 305     (*m_accept) = FALSE;
 306     (*m_res) = wxEmptyString;
 307     m_startValue = value;
 308 }
 309
 310 void wxTreeTextCtrl::OnChar( wxKeyEvent &event )
 311 {
 312     // TODO focus doesn't return to the wxTextCtrl when this closes...
 313     if (event.m_keyCode == WXK_RETURN)
 314     {
 315         (*m_accept) = TRUE;
 316         (*m_res) = GetValue();
 317
 318         if ((*m_accept) && ((*m_res) != m_startValue))
 319             m_owner->OnRenameAccept();
 320
 321         if (!wxPendingDelete.Member(this))
 322             wxPendingDelete.Append(this);
 323
 324         return;
 325     }
 326     if (event.m_keyCode == WXK_ESCAPE)
 327     {
 328         (*m_accept) = FALSE;
 329         (*m_res) = "";
 330
 331         if (!wxPendingDelete.Member(this))
 332             wxPendingDelete.Append(this);
 333
 334         return;
 335     }
 336     event.Skip();
 337 }
 338
 339 void wxTreeTextCtrl::OnKeyUp( wxKeyEvent &event )
 340 {
 341     // auto-grow the textctrl:
 342     wxSize parentSize = m_owner->GetSize();
 343     wxPoint myPos = GetPosition();
 344     wxSize mySize = GetSize();
 345     int sx, sy;
 346     GetTextExtent(GetValue() + _T("MM"), &sx, &sy);
 347     if (myPos.x + sx > parentSize.x) sx = parentSize.x - myPos.x;
 348     if (mySize.x > sx) sx = mySize.x;
 349     SetSize(sx, -1);
 350
 351     event.Skip();
 352 }
 353
 354 void wxTreeTextCtrl::OnKillFocus( wxFocusEvent &WXUNUSED(event) )
 355 {
 356     if (!wxPendingDelete.Member(this))
 357         wxPendingDelete.Append(this);
 358
 359     if ((*m_accept) && ((*m_res) != m_startValue))
 360         m_owner->OnRenameAccept();
 361 }
 362
 363 #if 0
 364 // -----------------------------------------------------------------------------
 365 // wxTreeEvent
 366 // -----------------------------------------------------------------------------
 367
 368 IMPLEMENT_DYNAMIC_CLASS(wxTreeEvent, wxNotifyEvent)
 369
 370 wxTreeEvent::wxTreeEvent( wxEventType commandType, int id )
 371            : wxNotifyEvent( commandType, id )
 372 {
 373     m_code = 0;
 374     m_itemOld = (wxGenericTreeItem *)NULL;
 375 }
 376 #endif
 377
 378 // -----------------------------------------------------------------------------
 379 // wxGenericTreeItem
 380 // -----------------------------------------------------------------------------
 381
 382 wxGenericTreeItem::wxGenericTreeItem(wxGenericTreeItem *parent,
 383                                      const wxString& text,
 384                                      wxDC& WXUNUSED(dc),
 385                                      int image, int selImage,
 386                                      wxTreeItemData *data)
 387                  : m_text(text)
 388 {
 389     m_images[wxTreeItemIcon_Normal] = image;
 390     m_images[wxTreeItemIcon_Selected] = selImage;
 391     m_images[wxTreeItemIcon_Expanded] = NO_IMAGE;
 392     m_images[wxTreeItemIcon_SelectedExpanded] = NO_IMAGE;
 393
 394     m_data = data;
 395     m_x = m_y = 0;
 396
 397     m_isCollapsed = TRUE;
 398     m_hasHilight = FALSE;
 399     m_hasPlus = FALSE;
 400     m_isBold = FALSE;
 401
 402     m_parent = parent;
 403
 404     m_attr = (wxTreeItemAttr *)NULL;
 405     m_ownsAttr = FALSE;
 406
 407     // We don't know the height here yet.
 408     m_width = 0;
 409     m_height = 0;
 410 }
 411
 412 wxGenericTreeItem::~wxGenericTreeItem()
 413 {
 414     delete m_data;
 415
 416     if (m_ownsAttr) delete m_attr;
 417
 418     wxASSERT_MSG( m_children.IsEmpty(),
 419                   wxT("please call DeleteChildren() before deleting the item") );
 420 }
 421
 422 void wxGenericTreeItem::DeleteChildren(wxGenericTreeCtrl *tree)
 423 {
 424     size_t count = m_children.Count();
 425     for ( size_t n = 0; n < count; n++ )
 426     {
 427         wxGenericTreeItem *child = m_children[n];
 428         if (tree)
 429             tree->SendDeleteEvent(child);
 430
 431         child->DeleteChildren(tree);
 432         delete child;
 433     }
 434
 435     m_children.Empty();
 436 }
 437
 438 void wxGenericTreeItem::SetText( const wxString &text )
 439 {
 440     m_text = text;
 441 }
 442
 443 size_t wxGenericTreeItem::GetChildrenCount(bool recursively) const
 444 {
 445     size_t count = m_children.Count();
 446     if ( !recursively )
 447         return count;
 448
 449     size_t total = count;
 450     for (size_t n = 0; n < count; ++n)
 451     {
 452         total += m_children[n]->GetChildrenCount();
 453     }
 454
 455     return total;
 456 }
 457
 458 void wxGenericTreeItem::GetSize( int &x, int &y,
 459                                  const wxGenericTreeCtrl *theButton )
 460 {
 461     int bottomY=m_y+theButton->GetLineHeight(this);
 462     if ( y < bottomY ) y = bottomY;
 463     int width = m_x +  m_width;
 464     if ( x < width ) x = width;
 465
 466     if (IsExpanded())
 467     {
 468         size_t count = m_children.Count();
 469         for ( size_t n = 0; n < count; ++n )
 470         {
 471             m_children[n]->GetSize( x, y, theButton );
 472         }
 473     }
 474 }
 475
 476 wxGenericTreeItem *wxGenericTreeItem::HitTest(const wxPoint& point,
 477                                               const wxGenericTreeCtrl *theCtrl,
 478                                               int &flags,
 479                                               int level)
 480 {
 481     // for a hidden root node, don't evaluate it, but do evaluate children
 482     if ( !(level == 0 && theCtrl->HasFlag(wxTR_HIDE_ROOT)) )
 483     {
 484         // evaluate the item
 485         int h = theCtrl->GetLineHeight(this);
 486         if ((point.y > m_y) && (point.y < m_y + h))
 487         {
 488             int y_mid = m_y + h/2;
 489             if (point.y < y_mid )
 490                 flags |= wxTREE_HITTEST_ONITEMUPPERPART;
 491             else
 492                 flags |= wxTREE_HITTEST_ONITEMLOWERPART;
 493
 494             // 5 is the size of the plus sign
 495             int xCross = m_x - theCtrl->GetSpacing();
 496             if ((point.x > xCross-5) && (point.x < xCross+5) &&
 497                 (point.y > y_mid-5) && (point.y < y_mid+5) &&
 498                 HasPlus() && theCtrl->HasButtons() )
 499             {
 500                 flags |= wxTREE_HITTEST_ONITEMBUTTON;
 501                 return this;
 502             }
 503
 504             if ((point.x >= m_x) && (point.x <= m_x+m_width))
 505             {
 506                 int image_w = -1;
 507                 int image_h;
 508
 509                 // assuming every image (normal and selected) has the same size!
 510                 if ( (GetImage() != NO_IMAGE) && theCtrl->m_imageListNormal )
 511                     theCtrl->m_imageListNormal->GetSize(GetImage(),
 512                                                         image_w, image_h);
 513
 514                 if ((image_w != -1) && (point.x <= m_x + image_w + 1))
 515                     flags |= wxTREE_HITTEST_ONITEMICON;
 516                 else
 517                     flags |= wxTREE_HITTEST_ONITEMLABEL;
 518
 519                 return this;
 520             }
 521
 522             if (point.x < m_x)
 523                 flags |= wxTREE_HITTEST_ONITEMINDENT;
 524             if (point.x > m_x+m_width)
 525                 flags |= wxTREE_HITTEST_ONITEMRIGHT;
 526
 527             return this;
 528         }
 529
 530         // if children are expanded, fall through to evaluate them
 531         if (m_isCollapsed) return (wxGenericTreeItem*) NULL;
 532     }
 533
 534     // evaluate children
 535     size_t count = m_children.Count();
 536     for ( size_t n = 0; n < count; n++ )
 537     {
 538         wxGenericTreeItem *res = m_children[n]->HitTest( point,
 539                                                          theCtrl,
 540                                                          flags,
 541                                                          level + 1 );
 542         if ( res != NULL )
 543             return res;
 544     }
 545
 546     return (wxGenericTreeItem*) NULL;
 547 }
 548
 549 int wxGenericTreeItem::GetCurrentImage() const
 550 {
 551     int image = NO_IMAGE;
 552     if ( IsExpanded() )
 553     {
 554         if ( IsSelected() )
 555         {
 556             image = GetImage(wxTreeItemIcon_SelectedExpanded);
 557         }
 558
 559         if ( image == NO_IMAGE )
 560         {
 561             // we usually fall back to the normal item, but try just the
 562             // expanded one (and not selected) first in this case
 563             image = GetImage(wxTreeItemIcon_Expanded);
 564         }
 565     }
 566     else // not expanded
 567     {
 568         if ( IsSelected() )
 569             image = GetImage(wxTreeItemIcon_Selected);
 570     }
 571
 572     // maybe it doesn't have the specific image we want,
 573     // try the default one instead
 574     if ( image == NO_IMAGE ) image = GetImage();
 575
 576     return image;
 577 }
 578
 579 // -----------------------------------------------------------------------------
 580 // wxGenericTreeCtrl implementation
 581 // -----------------------------------------------------------------------------
 582
 583 IMPLEMENT_DYNAMIC_CLASS(wxGenericTreeCtrl, wxScrolledWindow)
 584
 585 BEGIN_EVENT_TABLE(wxGenericTreeCtrl,wxScrolledWindow)
 586     EVT_PAINT          (wxGenericTreeCtrl::OnPaint)
 587     EVT_MOUSE_EVENTS   (wxGenericTreeCtrl::OnMouse)
 588     EVT_CHAR           (wxGenericTreeCtrl::OnChar)
 589     EVT_SET_FOCUS      (wxGenericTreeCtrl::OnSetFocus)
 590     EVT_KILL_FOCUS     (wxGenericTreeCtrl::OnKillFocus)
 591     EVT_IDLE           (wxGenericTreeCtrl::OnIdle)
 592 END_EVENT_TABLE()
 593
 594 #if !defined(__WXMSW__) || defined(__WIN16__) || defined(__WXUNIVERSAL__)
 595 /*
 596  * wxTreeCtrl has to be a real class or we have problems with
 597  * the run-time information.
 598  */
 599
 600 IMPLEMENT_DYNAMIC_CLASS(wxTreeCtrl, wxGenericTreeCtrl)
 601 #endif
 602
 603 // -----------------------------------------------------------------------------
 604 // construction/destruction
 605 // -----------------------------------------------------------------------------
 606
 607 void wxGenericTreeCtrl::Init()
 608 {
 609     m_current = m_key_current = m_anchor = (wxGenericTreeItem *) NULL;
 610     m_hasFocus = FALSE;
 611     m_dirty = FALSE;
 612
 613     m_lineHeight = 10;
 614     m_indent = 15;
 615     m_spacing = 18;
 616
 617     m_hilightBrush = new wxBrush
 618                          (
 619                             wxSystemSettings::GetSystemColour
 620                             (
 621                                 wxSYS_COLOUR_HIGHLIGHT
 622                             ),
 623                             wxSOLID
 624                          );
 625
 626     m_hilightUnfocusedBrush = new wxBrush
 627                               (
 628                                  wxSystemSettings::GetSystemColour
 629                                  (
 630                                      wxSYS_COLOUR_BTNSHADOW
 631                                  ),
 632                                  wxSOLID
 633                               );
 634
 635     m_imageListNormal = m_imageListButtons =
 636     m_imageListState = (wxImageList *) NULL;
 637     m_ownsImageListNormal = m_ownsImageListButtons =
 638     m_ownsImageListState = FALSE;
 639
 640     m_dragCount = 0;
 641     m_isDragging = FALSE;
 642     m_dropTarget = m_oldSelection = (wxGenericTreeItem *)NULL;
 643
 644     m_renameTimer = new wxTreeRenameTimer( this );
 645     m_lastOnSame = FALSE;
 646
 647     m_normalFont = wxSystemSettings::GetSystemFont( wxSYS_DEFAULT_GUI_FONT );
 648     m_boldFont = wxFont( m_normalFont.GetPointSize(),
 649                          m_normalFont.GetFamily(),
 650                          m_normalFont.GetStyle(),
 651                          wxBOLD,
 652                          m_normalFont.GetUnderlined());
 653 }
 654
 655 bool wxGenericTreeCtrl::Create(wxWindow *parent,
 656                                wxWindowID id,
 657                                const wxPoint& pos,
 658                                const wxSize& size,
 659                                long style,
 660                                const wxValidator &validator,
 661                                const wxString& name )
 662 {
 663     wxScrolledWindow::Create( parent, id, pos, size,
 664                               style|wxHSCROLL|wxVSCROLL, name );
 665
 666         // If the tree display has no buttons, but does have
 667         // connecting lines, we can use a narrower layout.
 668         // It may not be a good idea to force this...
 669     if (!HasButtons() && !HasFlag(wxTR_NO_LINES))
 670     {
 671         m_indent= 10;
 672         m_spacing = 10;
 673     }
 674
 675 #if wxUSE_VALIDATORS
 676     SetValidator( validator );
 677 #endif
 678
 679     SetBackgroundColour( wxSystemSettings::GetSystemColour( wxSYS_COLOUR_LISTBOX ) );
 680
 681 //  m_dottedPen = wxPen( "grey", 0, wxDOT );  too slow under XFree86
 682     m_dottedPen = wxPen( "grey", 0, 0 );
 683
 684     return TRUE;
 685 }
 686
 687 wxGenericTreeCtrl::~wxGenericTreeCtrl()
 688 {
 689     delete m_hilightBrush;
 690     delete m_hilightUnfocusedBrush;
 691
 692     DeleteAllItems();
 693
 694     delete m_renameTimer;
 695     if (m_ownsImageListNormal) delete m_imageListNormal;
 696     if (m_ownsImageListState) delete m_imageListState;
 697     if (m_ownsImageListButtons) delete m_imageListButtons;
 698 }
 699
 700 // -----------------------------------------------------------------------------
 701 // accessors
 702 // -----------------------------------------------------------------------------
 703
 704 size_t wxGenericTreeCtrl::GetCount() const
 705 {
 706     return m_anchor == NULL ? 0u : m_anchor->GetChildrenCount();
 707 }
 708
 709 void wxGenericTreeCtrl::SetIndent(unsigned int indent)
 710 {
 711     m_indent = indent;
 712     m_dirty = TRUE;
 713 }
 714
 715 void wxGenericTreeCtrl::SetSpacing(unsigned int spacing)
 716 {
 717     m_spacing = spacing;
 718     m_dirty = TRUE;
 719 }
 720
 721 size_t wxGenericTreeCtrl::GetChildrenCount(const wxTreeItemId& item, bool recursively)
 722 {
 723     wxCHECK_MSG( item.IsOk(), 0u, wxT("invalid tree item") );
 724
 725     return ((wxGenericTreeItem*) item.m_pItem)->GetChildrenCount(recursively);
 726 }
 727
 728 void wxGenericTreeCtrl::SetWindowStyle(const long styles)
 729 {
 730         // right now, just sets the styles.  Eventually, we may
 731         // want to update the inherited styles, but right now
 732         // none of the parents has updatable styles
 733     m_windowStyle = styles;
 734     m_dirty = TRUE;
 735 }
 736
 737 // -----------------------------------------------------------------------------
 738 // functions to work with tree items
 739 // -----------------------------------------------------------------------------
 740
 741 wxString wxGenericTreeCtrl::GetItemText(const wxTreeItemId& item) const
 742 {
 743     wxCHECK_MSG( item.IsOk(), wxT(""), wxT("invalid tree item") );
 744
 745     return ((wxGenericTreeItem*) item.m_pItem)->GetText();
 746 }
 747
 748 int wxGenericTreeCtrl::GetItemImage(const wxTreeItemId& item,
 749                              wxTreeItemIcon which) const
 750 {
 751     wxCHECK_MSG( item.IsOk(), -1, wxT("invalid tree item") );
 752
 753     return ((wxGenericTreeItem*) item.m_pItem)->GetImage(which);
 754 }
 755
 756 wxTreeItemData *wxGenericTreeCtrl::GetItemData(const wxTreeItemId& item) const
 757 {
 758     wxCHECK_MSG( item.IsOk(), NULL, wxT("invalid tree item") );
 759
 760     return ((wxGenericTreeItem*) item.m_pItem)->GetData();
 761 }
 762
 763 void wxGenericTreeCtrl::SetItemText(const wxTreeItemId& item, const wxString& text)
 764 {
 765     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 766
 767     wxClientDC dc(this);
 768     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 769     pItem->SetText(text);
 770     CalculateSize(pItem, dc);
 771     RefreshLine(pItem);
 772 }
 773
 774 void wxGenericTreeCtrl::SetItemImage(const wxTreeItemId& item,
 775                               int image,
 776                               wxTreeItemIcon which)
 777 {
 778     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 779
 780     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 781     pItem->SetImage(image, which);
 782
 783     wxClientDC dc(this);
 784     CalculateSize(pItem, dc);
 785     RefreshLine(pItem);
 786 }
 787
 788 void wxGenericTreeCtrl::SetItemData(const wxTreeItemId& item, wxTreeItemData *data)
 789 {
 790     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 791
 792     ((wxGenericTreeItem*) item.m_pItem)->SetData(data);
 793 }
 794
 795 void wxGenericTreeCtrl::SetItemHasChildren(const wxTreeItemId& item, bool has)
 796 {
 797     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 798
 799     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 800     pItem->SetHasPlus(has);
 801     RefreshLine(pItem);
 802 }
 803
 804 void wxGenericTreeCtrl::SetItemBold(const wxTreeItemId& item, bool bold)
 805 {
 806     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 807
 808     // avoid redrawing the tree if no real change
 809     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 810     if ( pItem->IsBold() != bold )
 811     {
 812         pItem->SetBold(bold);
 813         RefreshLine(pItem);
 814     }
 815 }
 816
 817 void wxGenericTreeCtrl::SetItemTextColour(const wxTreeItemId& item,
 818                                    const wxColour& col)
 819 {
 820     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 821
 822     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 823     pItem->Attr().SetTextColour(col);
 824     RefreshLine(pItem);
 825 }
 826
 827 void wxGenericTreeCtrl::SetItemBackgroundColour(const wxTreeItemId& item,
 828                                          const wxColour& col)
 829 {
 830     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 831
 832     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 833     pItem->Attr().SetBackgroundColour(col);
 834     RefreshLine(pItem);
 835 }
 836
 837 void wxGenericTreeCtrl::SetItemFont(const wxTreeItemId& item, const wxFont& font)
 838 {
 839     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 840
 841     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 842     pItem->Attr().SetFont(font);
 843     RefreshLine(pItem);
 844 }
 845
 846 bool wxGenericTreeCtrl::SetFont( const wxFont &font )
 847 {
 848     wxScrolledWindow::SetFont(font);
 849
 850     m_normalFont = font ;
 851     m_boldFont = wxFont( m_normalFont.GetPointSize(),
 852                             m_normalFont.GetFamily(),
 853                             m_normalFont.GetStyle(),
 854                             wxBOLD,
 855                             m_normalFont.GetUnderlined());
 856
 857     return TRUE;
 858 }
 859
 860
 861 // -----------------------------------------------------------------------------
 862 // item status inquiries
 863 // -----------------------------------------------------------------------------
 864
 865 bool wxGenericTreeCtrl::IsVisible(const wxTreeItemId& item) const
 866 {
 867     wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
 868
 869     // An item is only visible if it's not a descendant of a collapsed item
 870     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 871     wxGenericTreeItem* parent = pItem->GetParent();
 872     while (parent)
 873     {
 874         if (!parent->IsExpanded())
 875             return FALSE;
 876         parent = parent->GetParent();
 877     }
 878
 879     int startX, startY;
 880     GetViewStart(& startX, & startY);
 881
 882     wxSize clientSize = GetClientSize();
 883
 884     wxRect rect;
 885     if (!GetBoundingRect(item, rect))
 886         return FALSE;
 887     if (rect.GetWidth() == 0 || rect.GetHeight() == 0)
 888         return FALSE;
 889     if (rect.GetBottom() < 0 || rect.GetTop() > clientSize.y)
 890         return FALSE;
 891     if (rect.GetRight() < 0 || rect.GetLeft() > clientSize.x)
 892         return FALSE;
 893
 894     return TRUE;
 895 }
 896
 897 bool wxGenericTreeCtrl::ItemHasChildren(const wxTreeItemId& item) const
 898 {
 899     wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
 900
 901     return !((wxGenericTreeItem*) item.m_pItem)->GetChildren().IsEmpty();
 902 }
 903
 904 bool wxGenericTreeCtrl::IsExpanded(const wxTreeItemId& item) const
 905 {
 906     wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
 907
 908     return ((wxGenericTreeItem*) item.m_pItem)->IsExpanded();
 909 }
 910
 911 bool wxGenericTreeCtrl::IsSelected(const wxTreeItemId& item) const
 912 {
 913     wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
 914
 915     return ((wxGenericTreeItem*) item.m_pItem)->IsSelected();
 916 }
 917
 918 bool wxGenericTreeCtrl::IsBold(const wxTreeItemId& item) const
 919 {
 920     wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
 921
 922     return ((wxGenericTreeItem*) item.m_pItem)->IsBold();
 923 }
 924
 925 // -----------------------------------------------------------------------------
 926 // navigation
 927 // -----------------------------------------------------------------------------
 928
 929 wxTreeItemId wxGenericTreeCtrl::GetParent(const wxTreeItemId& item) const
 930 {
 931     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 932
 933     return ((wxGenericTreeItem*) item.m_pItem)->GetParent();
 934 }
 935
 936 wxTreeItemId wxGenericTreeCtrl::GetFirstChild(const wxTreeItemId& item, long& cookie) const
 937 {
 938     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 939
 940     cookie = 0;
 941     return GetNextChild(item, cookie);
 942 }
 943
 944 wxTreeItemId wxGenericTreeCtrl::GetNextChild(const wxTreeItemId& item, long& cookie) const
 945 {
 946     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 947
 948     wxArrayGenericTreeItems& children = ((wxGenericTreeItem*) item.m_pItem)->GetChildren();
 949     if ( (size_t)cookie < children.Count() )
 950     {
 951         return children.Item((size_t)cookie++);
 952     }
 953     else
 954     {
 955         // there are no more of them
 956         return wxTreeItemId();
 957     }
 958 }
 959
 960 wxTreeItemId wxGenericTreeCtrl::GetLastChild(const wxTreeItemId& item) const
 961 {
 962     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 963
 964     wxArrayGenericTreeItems& children = ((wxGenericTreeItem*) item.m_pItem)->GetChildren();
 965     return (children.IsEmpty() ? wxTreeItemId() : wxTreeItemId(children.Last()));
 966 }
 967
 968 wxTreeItemId wxGenericTreeCtrl::GetNextSibling(const wxTreeItemId& item) const
 969 {
 970     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 971
 972     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
 973     wxGenericTreeItem *parent = i->GetParent();
 974     if ( parent == NULL )
 975     {
 976         // root item doesn't have any siblings
 977         return wxTreeItemId();
 978     }
 979
 980     wxArrayGenericTreeItems& siblings = parent->GetChildren();
 981     int index = siblings.Index(i);
 982     wxASSERT( index != wxNOT_FOUND ); // I'm not a child of my parent?
 983
 984     size_t n = (size_t)(index + 1);
 985     return n == siblings.Count() ? wxTreeItemId() : wxTreeItemId(siblings[n]);
 986 }
 987
 988 wxTreeItemId wxGenericTreeCtrl::GetPrevSibling(const wxTreeItemId& item) const
 989 {
 990     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 991
 992     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
 993     wxGenericTreeItem *parent = i->GetParent();
 994     if ( parent == NULL )
 995     {
 996         // root item doesn't have any siblings
 997         return wxTreeItemId();
 998     }
 999
1000     wxArrayGenericTreeItems& siblings = parent->GetChildren();
1001     int index = siblings.Index(i);
1002     wxASSERT( index != wxNOT_FOUND ); // I'm not a child of my parent?
1003
1004     return index == 0 ? wxTreeItemId()
1005                       : wxTreeItemId(siblings[(size_t)(index - 1)]);
1006 }
1007
1008 // Only for internal use right now, but should probably be public
1009 wxTreeItemId wxGenericTreeCtrl::GetNext(const wxTreeItemId& item) const
1010 {
1011     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
1012
1013     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
1014
1015     // First see if there are any children.
1016     wxArrayGenericTreeItems& children = i->GetChildren();
1017     if (children.GetCount() > 0)
1018     {
1019          return children.Item(0);
1020     }
1021     else
1022     {
1023          // Try a sibling of this or ancestor instead
1024          wxTreeItemId p = item;
1025          wxTreeItemId toFind;
1026          do
1027          {
1028               toFind = GetNextSibling(p);
1029               p = GetParent(p);
1030          } while (p.IsOk() && !toFind.IsOk());
1031          return toFind;
1032     }
1033 }
1034
1035 wxTreeItemId wxGenericTreeCtrl::GetPrev(const wxTreeItemId& item) const
1036 {
1037     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
1038
1039     wxFAIL_MSG(wxT("not implemented"));
1040
1041     return wxTreeItemId();
1042 }
1043
1044 wxTreeItemId wxGenericTreeCtrl::GetFirstVisibleItem() const
1045 {
1046     wxTreeItemId id = GetRootItem();
1047     if (!id.IsOk())
1048         return id;
1049
1050     do
1051     {
1052         if (IsVisible(id))
1053               return id;
1054         id = GetNext(id);
1055     } while (id.IsOk());
1056
1057     return wxTreeItemId();
1058 }
1059
1060 wxTreeItemId wxGenericTreeCtrl::GetNextVisible(const wxTreeItemId& item) const
1061 {
1062     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
1063
1064     wxTreeItemId id = item;
1065     if (id.IsOk())
1066     {
1067         while (id = GetNext(id), id.IsOk())
1068         {
1069             if (IsVisible(id))
1070                 return id;
1071         }
1072     }
1073     return wxTreeItemId();
1074 }
1075
1076 wxTreeItemId wxGenericTreeCtrl::GetPrevVisible(const wxTreeItemId& item) const
1077 {
1078     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
1079
1080     wxFAIL_MSG(wxT("not implemented"));
1081
1082     return wxTreeItemId();
1083 }
1084
1085 // -----------------------------------------------------------------------------
1086 // operations
1087 // -----------------------------------------------------------------------------
1088
1089 wxTreeItemId wxGenericTreeCtrl::DoInsertItem(const wxTreeItemId& parentId,
1090                                       size_t previous,
1091                                       const wxString& text,
1092                                       int image, int selImage,
1093                                       wxTreeItemData *data)
1094 {
1095     wxGenericTreeItem *parent = (wxGenericTreeItem*) parentId.m_pItem;
1096     if ( !parent )
1097     {
1098         // should we give a warning here?
1099         return AddRoot(text, image, selImage, data);
1100     }
1101
1102     m_dirty = TRUE;     // do this first so stuff below doesn't cause flicker
1103
1104     wxClientDC dc(this);
1105     wxGenericTreeItem *item =
1106         new wxGenericTreeItem( parent, text, dc, image, selImage, data );
1107
1108     if ( data != NULL )
1109     {
1110         data->m_pItem = (long) item;
1111     }
1112
1113     parent->Insert( item, previous );
1114
1115     return item;
1116 }
1117
1118 wxTreeItemId wxGenericTreeCtrl::AddRoot(const wxString& text,
1119                                  int image, int selImage,
1120                                  wxTreeItemData *data)
1121 {
1122     wxCHECK_MSG( !m_anchor, wxTreeItemId(), wxT("tree can have only one root") );
1123
1124     m_dirty = TRUE;     // do this first so stuff below doesn't cause flicker
1125
1126     wxClientDC dc(this);
1127     m_anchor = new wxGenericTreeItem((wxGenericTreeItem *)NULL, text, dc,
1128                                    image, selImage, data);
1129     if (HasFlag(wxTR_HIDE_ROOT))
1130     {
1131         // if root is hidden, make sure we can navigate
1132         // into children
1133         m_anchor->SetHasPlus();
1134         Expand(m_anchor);
1135     }
1136     if ( data != NULL )
1137     {
1138         data->m_pItem = (long) m_anchor;
1139     }
1140
1141     if (!HasFlag(wxTR_MULTIPLE))
1142     {
1143         m_current = m_key_current = m_anchor;
1144         m_current->SetHilight( TRUE );
1145     }
1146
1147     return m_anchor;
1148 }
1149
1150 wxTreeItemId wxGenericTreeCtrl::PrependItem(const wxTreeItemId& parent,
1151                                      const wxString& text,
1152                                      int image, int selImage,
1153                                      wxTreeItemData *data)
1154 {
1155     return DoInsertItem(parent, 0u, text, image, selImage, data);
1156 }
1157
1158 wxTreeItemId wxGenericTreeCtrl::InsertItem(const wxTreeItemId& parentId,
1159                                     const wxTreeItemId& idPrevious,
1160                                     const wxString& text,
1161                                     int image, int selImage,
1162                                     wxTreeItemData *data)
1163 {
1164     wxGenericTreeItem *parent = (wxGenericTreeItem*) parentId.m_pItem;
1165     if ( !parent )
1166     {
1167         // should we give a warning here?
1168         return AddRoot(text, image, selImage, data);
1169     }
1170
1171     int index = parent->GetChildren().Index((wxGenericTreeItem*) idPrevious.m_pItem);
1172     wxASSERT_MSG( index != wxNOT_FOUND,
1173                   wxT("previous item in wxGenericTreeCtrl::InsertItem() is not a sibling") );
1174
1175     return DoInsertItem(parentId, (size_t)++index, text, image, selImage, data);
1176 }
1177
1178 wxTreeItemId wxGenericTreeCtrl::InsertItem(const wxTreeItemId& parentId,
1179                                     size_t before,
1180                                     const wxString& text,
1181                                     int image, int selImage,
1182                                     wxTreeItemData *data)
1183 {
1184     wxGenericTreeItem *parent = (wxGenericTreeItem*) parentId.m_pItem;
1185     if ( !parent )
1186     {
1187         // should we give a warning here?
1188         return AddRoot(text, image, selImage, data);
1189     }
1190
1191     return DoInsertItem(parentId, before, text, image, selImage, data);
1192 }
1193
1194 wxTreeItemId wxGenericTreeCtrl::AppendItem(const wxTreeItemId& parentId,
1195                                     const wxString& text,
1196                                     int image, int selImage,
1197                                     wxTreeItemData *data)
1198 {
1199     wxGenericTreeItem *parent = (wxGenericTreeItem*) parentId.m_pItem;
1200     if ( !parent )
1201     {
1202         // should we give a warning here?
1203         return AddRoot(text, image, selImage, data);
1204     }
1205
1206     return DoInsertItem( parent, parent->GetChildren().Count(), text,
1207                          image, selImage, data);
1208 }
1209
1210 void wxGenericTreeCtrl::SendDeleteEvent(wxGenericTreeItem *item)
1211 {
1212     wxTreeEvent event( wxEVT_COMMAND_TREE_DELETE_ITEM, GetId() );
1213     event.m_item = (long) item;
1214     event.SetEventObject( this );
1215     ProcessEvent( event );
1216 }
1217
1218 void wxGenericTreeCtrl::DeleteChildren(const wxTreeItemId& itemId)
1219 {
1220     m_dirty = TRUE;     // do this first so stuff below doesn't cause flicker
1221
1222     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1223     item->DeleteChildren(this);
1224 }
1225
1226 void wxGenericTreeCtrl::Delete(const wxTreeItemId& itemId)
1227 {
1228     m_dirty = TRUE;     // do this first so stuff below doesn't cause flicker
1229
1230     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1231
1232     // don't stay with invalid m_key_current or we will crash in
1233     // the next call to OnChar()
1234     bool changeKeyCurrent = FALSE;
1235     wxGenericTreeItem *itemKey = m_key_current;
1236     while ( itemKey )
1237     {
1238         if ( itemKey == item )
1239         {
1240             // m_key_current is a descendant of the item being deleted
1241             changeKeyCurrent = TRUE;
1242             break;
1243         }
1244         itemKey = itemKey->GetParent();
1245     }
1246
1247     wxGenericTreeItem *parent = item->GetParent();
1248     if ( parent )
1249     {
1250         parent->GetChildren().Remove( item );  // remove by value
1251     }
1252
1253     if ( changeKeyCurrent )
1254     {
1255         // may be NULL or not
1256         m_key_current = parent;
1257     }
1258
1259     item->DeleteChildren(this);
1260     SendDeleteEvent(item);
1261     delete item;
1262 }
1263
1264 void wxGenericTreeCtrl::DeleteAllItems()
1265 {
1266     if ( m_anchor )
1267     {
1268         m_dirty = TRUE;
1269
1270         m_anchor->DeleteChildren(this);
1271         delete m_anchor;
1272
1273         m_anchor = NULL;
1274     }
1275 }
1276
1277 void wxGenericTreeCtrl::Expand(const wxTreeItemId& itemId)
1278 {
1279     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1280
1281     wxCHECK_RET( item, _T("invalid item in wxGenericTreeCtrl::Expand") );
1282
1283     if ( !item->HasPlus() )
1284         return;
1285
1286     if ( item->IsExpanded() )
1287         return;
1288
1289     wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_EXPANDING, GetId() );
1290     event.m_item = (long) item;
1291     event.SetEventObject( this );
1292
1293     if ( ProcessEvent( event ) && !event.IsAllowed() )
1294     {
1295         // cancelled by program
1296         return;
1297     }
1298
1299     item->Expand();
1300     CalculatePositions();
1301
1302     RefreshSubtree(item);
1303
1304     event.SetEventType(wxEVT_COMMAND_TREE_ITEM_EXPANDED);
1305     ProcessEvent( event );
1306 }
1307
1308 void wxGenericTreeCtrl::ExpandAll(const wxTreeItemId& item)
1309 {
1310     Expand(item);
1311     if ( IsExpanded(item) )
1312     {
1313         long cookie;
1314         wxTreeItemId child = GetFirstChild(item, cookie);
1315         while ( child.IsOk() )
1316         {
1317             ExpandAll(child);
1318
1319             child = GetNextChild(item, cookie);
1320         }
1321     }
1322 }
1323
1324 void wxGenericTreeCtrl::Collapse(const wxTreeItemId& itemId)
1325 {
1326     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1327
1328     if ( !item->IsExpanded() )
1329         return;
1330
1331     wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_COLLAPSING, GetId() );
1332     event.m_item = (long) item;
1333     event.SetEventObject( this );
1334     if ( ProcessEvent( event ) && !event.IsAllowed() )
1335     {
1336         // cancelled by program
1337         return;
1338     }
1339
1340     item->Collapse();
1341
1342 #if 0  // TODO why should items be collapsed recursively?
1343     wxArrayGenericTreeItems& children = item->GetChildren();
1344     size_t count = children.Count();
1345     for ( size_t n = 0; n < count; n++ )
1346     {
1347         Collapse(children[n]);
1348     }
1349 #endif
1350
1351     CalculatePositions();
1352
1353     RefreshSubtree(item);
1354
1355     event.SetEventType(wxEVT_COMMAND_TREE_ITEM_COLLAPSED);
1356     ProcessEvent( event );
1357 }
1358
1359 void wxGenericTreeCtrl::CollapseAndReset(const wxTreeItemId& item)
1360 {
1361     Collapse(item);
1362     DeleteChildren(item);
1363 }
1364
1365 void wxGenericTreeCtrl::Toggle(const wxTreeItemId& itemId)
1366 {
1367     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1368
1369     if (item->IsExpanded())
1370         Collapse(itemId);
1371     else
1372         Expand(itemId);
1373 }
1374
1375 void wxGenericTreeCtrl::Unselect()
1376 {
1377     if (m_current)
1378     {
1379         m_current->SetHilight( FALSE );
1380         RefreshLine( m_current );
1381     }
1382 }
1383
1384 void wxGenericTreeCtrl::UnselectAllChildren(wxGenericTreeItem *item)
1385 {
1386     if (item->IsSelected())
1387     {
1388         item->SetHilight(FALSE);
1389         RefreshLine(item);
1390     }
1391
1392     if (item->HasChildren())
1393     {
1394         wxArrayGenericTreeItems& children = item->GetChildren();
1395         size_t count = children.Count();
1396         for ( size_t n = 0; n < count; ++n )
1397         {
1398             UnselectAllChildren(children[n]);
1399         }
1400     }
1401 }
1402
1403 void wxGenericTreeCtrl::UnselectAll()
1404 {
1405     UnselectAllChildren((wxGenericTreeItem*) GetRootItem().m_pItem);
1406 }
1407
1408 // Recursive function !
1409 // To stop we must have crt_item<last_item
1410 // Algorithm :
1411 // Tag all next children, when no more children,
1412 // Move to parent (not to tag)
1413 // Keep going... if we found last_item, we stop.
1414 bool wxGenericTreeCtrl::TagNextChildren(wxGenericTreeItem *crt_item, wxGenericTreeItem *last_item, bool select)
1415 {
1416     wxGenericTreeItem *parent = crt_item->GetParent();
1417
1418     if (parent == NULL) // This is root item
1419         return TagAllChildrenUntilLast(crt_item, last_item, select);
1420
1421     wxArrayGenericTreeItems& children = parent->GetChildren();
1422     int index = children.Index(crt_item);
1423     wxASSERT( index != wxNOT_FOUND ); // I'm not a child of my parent?
1424
1425     size_t count = children.Count();
1426     for (size_t n=(size_t)(index+1); n<count; ++n)
1427     {
1428         if (TagAllChildrenUntilLast(children[n], last_item, select)) return TRUE;
1429     }
1430
1431     return TagNextChildren(parent, last_item, select);
1432 }
1433
1434 bool wxGenericTreeCtrl::TagAllChildrenUntilLast(wxGenericTreeItem *crt_item, wxGenericTreeItem *last_item, bool select)
1435 {
1436     crt_item->SetHilight(select);
1437     RefreshLine(crt_item);
1438
1439     if (crt_item==last_item)
1440         return TRUE;
1441
1442     if (crt_item->HasChildren())
1443     {
1444         wxArrayGenericTreeItems& children = crt_item->GetChildren();
1445         size_t count = children.Count();
1446         for ( size_t n = 0; n < count; ++n )
1447         {
1448             if (TagAllChildrenUntilLast(children[n], last_item, select))
1449                 return TRUE;
1450         }
1451     }
1452
1453   return FALSE;
1454 }
1455
1456 void wxGenericTreeCtrl::SelectItemRange(wxGenericTreeItem *item1, wxGenericTreeItem *item2)
1457 {
1458     // item2 is not necessary after item1
1459     wxGenericTreeItem *first=NULL, *last=NULL;
1460
1461     // choice first' and 'last' between item1 and item2
1462     if (item1->GetY()<item2->GetY())
1463     {
1464         first=item1;
1465         last=item2;
1466     }
1467     else
1468     {
1469         first=item2;
1470         last=item1;
1471     }
1472
1473     bool select = m_current->IsSelected();
1474
1475     if ( TagAllChildrenUntilLast(first,last,select) )
1476         return;
1477
1478     TagNextChildren(first,last,select);
1479 }
1480
1481 void wxGenericTreeCtrl::SelectItem(const wxTreeItemId& itemId,
1482                             bool unselect_others,
1483                             bool extended_select)
1484 {
1485     wxCHECK_RET( itemId.IsOk(), wxT("invalid tree item") );
1486
1487     bool is_single=!(GetWindowStyleFlag() & wxTR_MULTIPLE);
1488     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1489
1490     //wxCHECK_RET( ( (!unselect_others) && is_single),
1491     //           wxT("this is a single selection tree") );
1492
1493     // to keep going anyhow !!!
1494     if (is_single)
1495     {
1496         if (item->IsSelected())
1497             return; // nothing to do
1498         unselect_others = TRUE;
1499         extended_select = FALSE;
1500     }
1501     else if ( unselect_others && item->IsSelected() )
1502     {
1503         // selection change if there is more than one item currently selected
1504         wxArrayTreeItemIds selected_items;
1505         if ( GetSelections(selected_items) == 1 )
1506             return;
1507     }
1508
1509     wxTreeEvent event( wxEVT_COMMAND_TREE_SEL_CHANGING, GetId() );
1510     event.m_item = (long) item;
1511     event.m_itemOld = (long) m_current;
1512     event.SetEventObject( this );
1513     // TODO : Here we don't send any selection mode yet !
1514
1515     if ( GetEventHandler()->ProcessEvent( event ) && !event.IsAllowed() )
1516         return;
1517
1518     wxTreeItemId parent = GetParent( itemId );
1519     while (parent.IsOk())
1520     {
1521         if (!IsExpanded(parent))
1522             Expand( parent );
1523
1524         parent = GetParent( parent );
1525     }
1526
1527     EnsureVisible( itemId );
1528
1529     // ctrl press
1530     if (unselect_others)
1531     {
1532         if (is_single) Unselect(); // to speed up thing
1533         else UnselectAll();
1534     }
1535
1536     // shift press
1537     if (extended_select)
1538     {
1539         if ( !m_current )
1540         {
1541             m_current = m_key_current = (wxGenericTreeItem*) GetRootItem().m_pItem;
1542         }
1543
1544         // don't change the mark (m_current)
1545         SelectItemRange(m_current, item);
1546     }
1547     else
1548     {
1549         bool select=TRUE; // the default
1550
1551         // Check if we need to toggle hilight (ctrl mode)
1552         if (!unselect_others)
1553             select=!item->IsSelected();
1554
1555         m_current = m_key_current = item;
1556         m_current->SetHilight(select);
1557         RefreshLine( m_current );
1558     }
1559
1560     event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGED);
1561     GetEventHandler()->ProcessEvent( event );
1562 }
1563
1564 void wxGenericTreeCtrl::FillArray(wxGenericTreeItem *item,
1565                            wxArrayTreeItemIds &array) const
1566 {
1567     if ( item->IsSelected() )
1568         array.Add(wxTreeItemId(item));
1569
1570     if ( item->HasChildren() )
1571     {
1572         wxArrayGenericTreeItems& children = item->GetChildren();
1573         size_t count = children.GetCount();
1574         for ( size_t n = 0; n < count; ++n )
1575             FillArray(children[n], array);
1576     }
1577 }
1578
1579 size_t wxGenericTreeCtrl::GetSelections(wxArrayTreeItemIds &array) const
1580 {
1581     array.Empty();
1582     wxTreeItemId idRoot = GetRootItem();
1583     if ( idRoot.IsOk() )
1584     {
1585         FillArray((wxGenericTreeItem*) idRoot.m_pItem, array);
1586     }
1587     //else: the tree is empty, so no selections
1588
1589     return array.Count();
1590 }
1591
1592 void wxGenericTreeCtrl::EnsureVisible(const wxTreeItemId& item)
1593 {
1594     if (!item.IsOk()) return;
1595
1596     wxGenericTreeItem *gitem = (wxGenericTreeItem*) item.m_pItem;
1597
1598     // first expand all parent branches
1599     wxGenericTreeItem *parent = gitem->GetParent();
1600     while ( parent )
1601     {
1602         Expand(parent);
1603         parent = parent->GetParent();
1604     }
1605
1606     //if (parent) CalculatePositions();
1607
1608     ScrollTo(item);
1609 }
1610
1611 void wxGenericTreeCtrl::ScrollTo(const wxTreeItemId &item)
1612 {
1613     if (!item.IsOk()) return;
1614
1615     // We have to call this here because the label in
1616     // question might just have been added and no screen
1617     // update taken place.
1618     if (m_dirty) wxYieldIfNeeded();
1619
1620     wxGenericTreeItem *gitem = (wxGenericTreeItem*) item.m_pItem;
1621
1622     // now scroll to the item
1623     int item_y = gitem->GetY();
1624
1625     int start_x = 0;
1626     int start_y = 0;
1627     GetViewStart( &start_x, &start_y );
1628     start_y *= PIXELS_PER_UNIT;
1629
1630     int client_h = 0;
1631     int client_w = 0;
1632     GetClientSize( &client_w, &client_h );
1633
1634     if (item_y < start_y+3)
1635     {
1636         // going down
1637         int x = 0;
1638         int y = 0;
1639         m_anchor->GetSize( x, y, this );
1640         y += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1641         x += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1642         int x_pos = GetScrollPos( wxHORIZONTAL );
1643         // Item should appear at top
1644         SetScrollbars( PIXELS_PER_UNIT, PIXELS_PER_UNIT, x/PIXELS_PER_UNIT, y/PIXELS_PER_UNIT, x_pos, item_y/PIXELS_PER_UNIT );
1645     }
1646     else if (item_y+GetLineHeight(gitem) > start_y+client_h)
1647     {
1648         // going up
1649         int x = 0;
1650         int y = 0;
1651         m_anchor->GetSize( x, y, this );
1652         y += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1653         x += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1654         item_y += PIXELS_PER_UNIT+2;
1655         int x_pos = GetScrollPos( wxHORIZONTAL );
1656         // Item should appear at bottom
1657         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 );
1658     }
1659 }
1660
1661 // FIXME: tree sorting functions are not reentrant and not MT-safe!
1662 static wxGenericTreeCtrl *s_treeBeingSorted = NULL;
1663
1664 static int LINKAGEMODE tree_ctrl_compare_func(wxGenericTreeItem **item1,
1665                                   wxGenericTreeItem **item2)
1666 {
1667     wxCHECK_MSG( s_treeBeingSorted, 0, wxT("bug in wxGenericTreeCtrl::SortChildren()") );
1668
1669     return s_treeBeingSorted->OnCompareItems(*item1, *item2);
1670 }
1671
1672 int wxGenericTreeCtrl::OnCompareItems(const wxTreeItemId& item1,
1673                                const wxTreeItemId& item2)
1674 {
1675     return wxStrcmp(GetItemText(item1), GetItemText(item2));
1676 }
1677
1678 void wxGenericTreeCtrl::SortChildren(const wxTreeItemId& itemId)
1679 {
1680     wxCHECK_RET( itemId.IsOk(), wxT("invalid tree item") );
1681
1682     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1683
1684     wxCHECK_RET( !s_treeBeingSorted,
1685                  wxT("wxGenericTreeCtrl::SortChildren is not reentrant") );
1686
1687     wxArrayGenericTreeItems& children = item->GetChildren();
1688     if ( children.Count() > 1 )
1689     {
1690         m_dirty = TRUE;
1691
1692         s_treeBeingSorted = this;
1693         children.Sort(tree_ctrl_compare_func);
1694         s_treeBeingSorted = NULL;
1695     }
1696     //else: don't make the tree dirty as nothing changed
1697 }
1698
1699 wxImageList *wxGenericTreeCtrl::GetImageList() const
1700 {
1701     return m_imageListNormal;
1702 }
1703
1704 wxImageList *wxGenericTreeCtrl::GetButtonsImageList() const
1705 {
1706     return m_imageListButtons;
1707 }
1708
1709 wxImageList *wxGenericTreeCtrl::GetStateImageList() const
1710 {
1711     return m_imageListState;
1712 }
1713
1714 void wxGenericTreeCtrl::CalculateLineHeight()
1715 {
1716     wxClientDC dc(this);
1717     m_lineHeight = (int)(dc.GetCharHeight() + 4);
1718
1719     if ( m_imageListNormal )
1720     {
1721         // Calculate a m_lineHeight value from the normal Image sizes.
1722         // May be toggle off. Then wxGenericTreeCtrl will spread when
1723         // necessary (which might look ugly).
1724         int n = m_imageListNormal->GetImageCount();
1725         for (int i = 0; i < n ; i++)
1726         {
1727             int width = 0, height = 0;
1728             m_imageListNormal->GetSize(i, width, height);
1729             if (height > m_lineHeight) m_lineHeight = height;
1730         }
1731     }
1732
1733     if (m_imageListButtons)
1734     {
1735         // Calculate a m_lineHeight value from the Button image sizes.
1736         // May be toggle off. Then wxGenericTreeCtrl will spread when
1737         // necessary (which might look ugly).
1738         int n = m_imageListButtons->GetImageCount();
1739         for (int i = 0; i < n ; i++)
1740         {
1741             int width = 0, height = 0;
1742             m_imageListButtons->GetSize(i, width, height);
1743             if (height > m_lineHeight) m_lineHeight = height;
1744         }
1745     }
1746
1747     if (m_lineHeight < 30)
1748         m_lineHeight += 2;                 // at least 2 pixels
1749     else
1750         m_lineHeight += m_lineHeight/10;   // otherwise 10% extra spacing
1751 }
1752
1753 void wxGenericTreeCtrl::SetImageList(wxImageList *imageList)
1754 {
1755     if (m_ownsImageListNormal) delete m_imageListNormal;
1756     m_imageListNormal = imageList;
1757     m_ownsImageListNormal = FALSE;
1758     m_dirty = TRUE;
1759     CalculateLineHeight();
1760 }
1761
1762 void wxGenericTreeCtrl::SetStateImageList(wxImageList *imageList)
1763 {
1764     if (m_ownsImageListState) delete m_imageListState;
1765     m_imageListState = imageList;
1766     m_ownsImageListState = FALSE;
1767 }
1768
1769 void wxGenericTreeCtrl::SetButtonsImageList(wxImageList *imageList)
1770 {
1771     if (m_ownsImageListButtons) delete m_imageListButtons;
1772     m_imageListButtons = imageList;
1773     m_ownsImageListButtons = FALSE;
1774     m_dirty = TRUE;
1775     CalculateLineHeight();
1776 }
1777
1778 void wxGenericTreeCtrl::AssignImageList(wxImageList *imageList)
1779 {
1780     SetImageList(imageList);
1781     m_ownsImageListNormal = TRUE;
1782 }
1783
1784 void wxGenericTreeCtrl::AssignStateImageList(wxImageList *imageList)
1785 {
1786     SetStateImageList(imageList);
1787     m_ownsImageListState = TRUE;
1788 }
1789
1790 void wxGenericTreeCtrl::AssignButtonsImageList(wxImageList *imageList)
1791 {
1792     SetButtonsImageList(imageList);
1793     m_ownsImageListButtons = TRUE;
1794 }
1795
1796 // -----------------------------------------------------------------------------
1797 // helpers
1798 // -----------------------------------------------------------------------------
1799
1800 void wxGenericTreeCtrl::AdjustMyScrollbars()
1801 {
1802     if (m_anchor)
1803     {
1804         int x = 0, y = 0;
1805         m_anchor->GetSize( x, y, this );
1806         y += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1807         x += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1808         int x_pos = GetScrollPos( wxHORIZONTAL );
1809         int y_pos = GetScrollPos( wxVERTICAL );
1810         SetScrollbars( PIXELS_PER_UNIT, PIXELS_PER_UNIT, x/PIXELS_PER_UNIT, y/PIXELS_PER_UNIT, x_pos, y_pos );
1811     }
1812     else
1813     {
1814         SetScrollbars( 0, 0, 0, 0 );
1815     }
1816 }
1817
1818 int wxGenericTreeCtrl::GetLineHeight(wxGenericTreeItem *item) const
1819 {
1820     if (GetWindowStyleFlag() & wxTR_HAS_VARIABLE_ROW_HEIGHT)
1821         return item->GetHeight();
1822     else
1823         return m_lineHeight;
1824 }
1825
1826 void wxGenericTreeCtrl::PaintItem(wxGenericTreeItem *item, wxDC& dc)
1827 {
1828     // TODO implement "state" icon on items
1829
1830     wxTreeItemAttr *attr = item->GetAttributes();
1831     if ( attr && attr->HasFont() )
1832         dc.SetFont(attr->GetFont());
1833     else if (item->IsBold())
1834         dc.SetFont(m_boldFont);
1835
1836     long text_w = 0, text_h = 0;
1837     dc.GetTextExtent( item->GetText(), &text_w, &text_h );
1838
1839     int image_h = 0, image_w = 0;
1840     int image = item->GetCurrentImage();
1841     if ( image != NO_IMAGE )
1842     {
1843         if ( m_imageListNormal )
1844         {
1845             m_imageListNormal->GetSize( image, image_w, image_h );
1846             image_w += 4;
1847         }
1848         else
1849         {
1850             image = NO_IMAGE;
1851         }
1852     }
1853
1854     int total_h = GetLineHeight(item);
1855
1856     if ( item->IsSelected() )
1857     {
1858         dc.SetBrush(*(m_hasFocus ? m_hilightBrush : m_hilightUnfocusedBrush));
1859     }
1860     else
1861     {
1862         wxColour colBg;
1863         if ( attr && attr->HasBackgroundColour() )
1864             colBg = attr->GetBackgroundColour();
1865         else
1866             colBg = m_backgroundColour;
1867         dc.SetBrush(wxBrush(colBg, wxSOLID));
1868     }
1869
1870     int offset = HasFlag(wxTR_ROW_LINES) ? 1 : 0;
1871
1872     if ( item->IsSelected() && image != NO_IMAGE )
1873     {
1874         // If it's selected, and there's an image, then we should
1875         // take care to leave the area under the image painted in the
1876         // background colour.
1877         dc.DrawRectangle( item->GetX() + image_w - 2, item->GetY()+offset,
1878                           item->GetWidth() - image_w + 2, total_h-offset );
1879     }
1880     else
1881     {
1882         dc.DrawRectangle( item->GetX()-2, item->GetY()+offset,
1883                           item->GetWidth()+2, total_h-offset );
1884     }
1885
1886     if ( image != NO_IMAGE )
1887     {
1888         dc.SetClippingRegion( item->GetX(), item->GetY(), image_w-2, total_h );
1889         m_imageListNormal->Draw( image, dc,
1890                                  item->GetX(),
1891                                  item->GetY() +((total_h > image_h)?((total_h-image_h)/2):0),
1892                                  wxIMAGELIST_DRAW_TRANSPARENT );
1893         dc.DestroyClippingRegion();
1894     }
1895
1896     dc.SetBackgroundMode(wxTRANSPARENT);
1897     int extraH = (total_h > text_h) ? (total_h - text_h)/2 : 0;
1898     dc.DrawText( item->GetText(),
1899                  (wxCoord)(image_w + item->GetX()),
1900                  (wxCoord)(item->GetY() + extraH));
1901
1902     // restore normal font
1903     dc.SetFont( m_normalFont );
1904 }
1905
1906 // Now y stands for the top of the item, whereas it used to stand for middle !
1907 void wxGenericTreeCtrl::PaintLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y )
1908 {
1909     int x = level*m_indent;
1910     if (!HasFlag(wxTR_HIDE_ROOT))
1911     {
1912         x += m_indent;
1913     }
1914     else if (level == 0)
1915     {
1916         wxArrayGenericTreeItems& children = item->GetChildren();
1917         size_t n, count = children.Count();
1918         for (n = 0; n < count; ++n)
1919             PaintLevel(children[n], dc, 1, y);
1920         return;
1921     }
1922
1923     item->SetX(x+m_spacing);
1924     item->SetY(y);
1925
1926     int h = GetLineHeight(item);
1927     int y_top = y;
1928     int y_mid = y_top + (h>>1);
1929     y += h;
1930
1931     int exposed_x = dc.LogicalToDeviceX(0);
1932     int exposed_y = dc.LogicalToDeviceY(y_top);
1933
1934     if (IsExposed(exposed_x, exposed_y, 10000, h))  // 10000 = very much
1935     {
1936         if (item->HasPlus() && HasButtons())  // should the item show a button?
1937         {
1938             if (!HasFlag(wxTR_NO_LINES))
1939             {
1940                 if (x > (signed)m_indent || HasFlag(wxTR_LINES_AT_ROOT))
1941                     dc.DrawLine(x - m_indent, y_mid, x - 5, y_mid);
1942                 dc.DrawLine(x + 5, y_mid, x + m_spacing, y_mid);
1943             }
1944
1945             if (m_imageListButtons != NULL)
1946             {
1947                 // draw the image button here
1948                 int image_h = 0, image_w = 0, image = wxCLOSED_BUTTON;
1949                 if (item->IsExpanded()) image = wxOPEN_BUTTON;
1950                 if (item->IsSelected())
1951                     image += wxOPEN_BUTTON_SELECTED - wxOPEN_BUTTON;
1952                 m_imageListButtons->GetSize(image, image_w, image_h);
1953                 int xx = x - (image_w>>1);
1954                 int yy = y_mid - (image_h>>1);
1955                 dc.SetClippingRegion(xx, yy, image_w, image_h);
1956                 m_imageListButtons->Draw(image, dc, xx, yy,
1957                                          wxIMAGELIST_DRAW_TRANSPARENT);
1958                 dc.DestroyClippingRegion();
1959             }
1960             else if (HasFlag(wxTR_TWIST_BUTTONS))
1961             {
1962                 // draw the twisty button here
1963                 dc.SetPen(*wxBLACK_PEN);
1964                 dc.SetBrush(*m_hilightBrush);
1965
1966                 wxPoint button[3];
1967
1968                 if (item->IsExpanded())
1969                 {
1970                     button[0].x = x-5;
1971                     button[0].y = y_mid-2;
1972                     button[1].x = x+5;
1973                     button[1].y = y_mid-2;
1974                     button[2].x = x;
1975                     button[2].y = y_mid+3;
1976                 }
1977                 else
1978                 {
1979                     button[0].y = y_mid-5;
1980                     button[0].x = x-2;
1981                     button[1].y = y_mid+5;
1982                     button[1].x = x-2;
1983                     button[2].y = y_mid;
1984                     button[2].x = x+3;
1985                 }
1986                 dc.DrawPolygon(3, button);
1987
1988                 dc.SetPen(m_dottedPen);
1989             }
1990             else // if (HasFlag(wxTR_HAS_BUTTONS))
1991             {
1992                 // draw the plus sign here
1993                 dc.SetPen(*wxGREY_PEN);
1994                 dc.SetBrush(*wxWHITE_BRUSH);
1995                 dc.DrawRectangle(x-5, y_mid-4, 11, 9);
1996                 dc.SetPen(*wxBLACK_PEN);
1997                 dc.DrawLine(x-2, y_mid, x+3, y_mid);
1998                 if (!item->IsExpanded())
1999                     dc.DrawLine(x, y_mid-2, x, y_mid+3);
2000                 dc.SetPen(m_dottedPen);
2001             }
2002         }
2003         else if (!HasFlag(wxTR_NO_LINES))  // no button; maybe a line?
2004         {
2005             // draw the horizontal line here
2006             int x_start = x;
2007             if (x > (signed)m_indent || HasFlag(wxTR_LINES_AT_ROOT))
2008                 x_start -= m_indent;
2009             dc.DrawLine(x_start, y_mid, x + m_spacing, y_mid);
2010         }
2011
2012         wxPen *pen =
2013 #ifndef __WXMAC__
2014             // don't draw rect outline if we already have the
2015             // background color under Mac
2016             (item->IsSelected() && m_hasFocus) ? wxBLACK_PEN :
2017 #endif // !__WXMAC__
2018             wxTRANSPARENT_PEN;
2019
2020         wxColour colText;
2021         if ( item->IsSelected() )
2022         {
2023             colText = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_HIGHLIGHTTEXT);
2024         }
2025         else
2026         {
2027             wxTreeItemAttr *attr = item->GetAttributes();
2028             if (attr && attr->HasTextColour())
2029                 colText = attr->GetTextColour();
2030             else
2031                 colText = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOWTEXT);
2032         }
2033
2034         // prepare to draw
2035         dc.SetTextForeground(colText);
2036         dc.SetPen(*pen);
2037
2038         // draw
2039         PaintItem(item, dc);
2040
2041         if (HasFlag(wxTR_ROW_LINES))
2042         {
2043             dc.SetPen(*wxWHITE_PEN);
2044             dc.DrawLine(0, y_top, 10000, y_top);
2045             dc.DrawLine(0, y, 10000, y);
2046         }
2047
2048         // restore DC objects
2049         dc.SetBrush(*wxWHITE_BRUSH);
2050         dc.SetPen(m_dottedPen);
2051         dc.SetTextForeground(*wxBLACK);
2052     }
2053
2054     if (item->IsExpanded())
2055     {
2056         wxArrayGenericTreeItems& children = item->GetChildren();
2057         int count = children.Count();
2058         if (count > 0)
2059         {
2060             int n = 0, oldY;
2061             ++level;
2062             do {
2063                 oldY = y;
2064                 PaintLevel(children[n], dc, level, y);
2065             } while (++n < count);
2066
2067             if (!HasFlag(wxTR_NO_LINES))
2068             {
2069                 // draw line down to last child
2070                 oldY += GetLineHeight(children[n-1])/2;
2071                 if (HasButtons()) y_mid += 5;
2072                 dc.DrawLine(x, y_mid, x, oldY);
2073             }
2074         }
2075     }
2076 }
2077
2078 void wxGenericTreeCtrl::DrawDropEffect(wxGenericTreeItem *item)
2079 {
2080     if ( item )
2081     {
2082         if ( item->HasPlus() )
2083         {
2084             // it's a folder, indicate it by a border
2085             DrawBorder(item);
2086         }
2087         else
2088         {
2089             // draw a line under the drop target because the item will be
2090             // dropped there
2091             DrawLine(item, TRUE /* below */);
2092         }
2093
2094         SetCursor(wxCURSOR_BULLSEYE);
2095     }
2096     else
2097     {
2098         // can't drop here
2099         SetCursor(wxCURSOR_NO_ENTRY);
2100     }
2101 }
2102
2103 void wxGenericTreeCtrl::DrawBorder(const wxTreeItemId &item)
2104 {
2105     wxCHECK_RET( item.IsOk(), _T("invalid item in wxGenericTreeCtrl::DrawLine") );
2106
2107     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
2108
2109     wxClientDC dc(this);
2110     PrepareDC( dc );
2111     dc.SetLogicalFunction(wxINVERT);
2112     dc.SetBrush(*wxTRANSPARENT_BRUSH);
2113
2114     int w = i->GetWidth() + 2;
2115     int h = GetLineHeight(i) + 2;
2116
2117     dc.DrawRectangle( i->GetX() - 1, i->GetY() - 1, w, h);
2118 }
2119
2120 void wxGenericTreeCtrl::DrawLine(const wxTreeItemId &item, bool below)
2121 {
2122     wxCHECK_RET( item.IsOk(), _T("invalid item in wxGenericTreeCtrl::DrawLine") );
2123
2124     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
2125
2126     wxClientDC dc(this);
2127     PrepareDC( dc );
2128     dc.SetLogicalFunction(wxINVERT);
2129
2130     int x = i->GetX(),
2131         y = i->GetY();
2132     if ( below )
2133     {
2134         y += GetLineHeight(i) - 1;
2135     }
2136
2137     dc.DrawLine( x, y, x + i->GetWidth(), y);
2138 }
2139
2140 // -----------------------------------------------------------------------------
2141 // wxWindows callbacks
2142 // -----------------------------------------------------------------------------
2143
2144 void wxGenericTreeCtrl::OnPaint( wxPaintEvent &WXUNUSED(event) )
2145 {
2146     wxPaintDC dc(this);
2147     PrepareDC( dc );
2148
2149     if ( !m_anchor)
2150         return;
2151
2152     dc.SetFont( m_normalFont );
2153     dc.SetPen( m_dottedPen );
2154
2155     // this is now done dynamically
2156     //if(GetImageList() == NULL)
2157     // m_lineHeight = (int)(dc.GetCharHeight() + 4);
2158
2159     int y = 2;
2160     PaintLevel( m_anchor, dc, 0, y );
2161 }
2162
2163 void wxGenericTreeCtrl::OnSetFocus( wxFocusEvent &event )
2164 {
2165     m_hasFocus = TRUE;
2166
2167     RefreshSelected();
2168
2169     event.Skip();
2170 }
2171
2172 void wxGenericTreeCtrl::OnKillFocus( wxFocusEvent &event )
2173 {
2174     m_hasFocus = FALSE;
2175
2176     RefreshSelected();
2177
2178     event.Skip();
2179 }
2180
2181 void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
2182 {
2183     wxTreeEvent te( wxEVT_COMMAND_TREE_KEY_DOWN, GetId() );
2184     te.m_code = (int)event.KeyCode();
2185     te.SetEventObject( this );
2186     if ( GetEventHandler()->ProcessEvent( te ) )
2187     {
2188         // intercepted by the user code
2189         return;
2190     }
2191
2192     if ( (m_current == 0) || (m_key_current == 0) )
2193     {
2194         event.Skip();
2195         return;
2196     }
2197
2198     // how should the selection work for this event?
2199     bool is_multiple, extended_select, unselect_others;
2200     EventFlagsToSelType(GetWindowStyleFlag(),
2201                         event.ShiftDown(),
2202                         event.ControlDown(),
2203                         is_multiple, extended_select, unselect_others);
2204
2205     // + : Expand
2206     // - : Collaspe
2207     // * : Expand all/Collapse all
2208     // ' ' | return : activate
2209     // up    : go up (not last children!)
2210     // down  : go down
2211     // left  : go to parent
2212     // right : open if parent and go next
2213     // home  : go to root
2214     // end   : go to last item without opening parents
2215     switch (event.KeyCode())
2216     {
2217         case '+':
2218         case WXK_ADD:
2219             if (m_current->HasPlus() && !IsExpanded(m_current))
2220             {
2221                 Expand(m_current);
2222             }
2223             break;
2224
2225         case '*':
2226         case WXK_MULTIPLY:
2227             if ( !IsExpanded(m_current) )
2228             {
2229                 // expand all
2230                 ExpandAll(m_current);
2231                 break;
2232             }
2233             //else: fall through to Collapse() it
2234
2235         case '-':
2236         case WXK_SUBTRACT:
2237             if (IsExpanded(m_current))
2238             {
2239                 Collapse(m_current);
2240             }
2241             break;
2242
2243         case ' ':
2244         case WXK_RETURN:
2245             {
2246                 wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_ACTIVATED, GetId() );
2247                 event.m_item = (long) m_current;
2248                 event.m_code = 0;
2249                 event.SetEventObject( this );
2250                 GetEventHandler()->ProcessEvent( event );
2251             }
2252             break;
2253
2254             // up goes to the previous sibling or to the last
2255             // of its children if it's expanded
2256         case WXK_UP:
2257             {
2258                 wxTreeItemId prev = GetPrevSibling( m_key_current );
2259                 if (!prev)
2260                 {
2261                     prev = GetParent( m_key_current );
2262                     if ((prev == GetRootItem()) && HasFlag(wxTR_HIDE_ROOT))
2263                     {
2264                         break;  // don't go to root if it is hidden
2265                     }
2266                     if (prev)
2267                     {
2268                         long cookie = 0;
2269                         wxTreeItemId current = m_key_current;
2270                         // TODO: Huh?  If we get here, we'd better be the first child of our parent.  How else could it be?
2271                         if (current == GetFirstChild( prev, cookie ))
2272                         {
2273                             // otherwise we return to where we came from
2274                             SelectItem( prev, unselect_others, extended_select );
2275                             m_key_current= (wxGenericTreeItem*) prev.m_pItem;
2276                             EnsureVisible( prev );
2277                             break;
2278                         }
2279                     }
2280                 }
2281                 if (prev)
2282                 {
2283                     while ( IsExpanded(prev) && HasChildren(prev) )
2284                     {
2285                         wxTreeItemId child = GetLastChild(prev);
2286                         if ( child )
2287                         {
2288                             prev = child;
2289                         }
2290                     }
2291
2292                     SelectItem( prev, unselect_others, extended_select );
2293                     m_key_current=(wxGenericTreeItem*) prev.m_pItem;
2294                     EnsureVisible( prev );
2295                 }
2296             }
2297             break;
2298
2299             // left arrow goes to the parent
2300         case WXK_LEFT:
2301             {
2302                 wxTreeItemId prev = GetParent( m_current );
2303                 if ((prev == GetRootItem()) && HasFlag(wxTR_HIDE_ROOT))
2304                 {
2305                     // don't go to root if it is hidden
2306                     prev = GetPrevSibling( m_current );
2307                 }
2308                 if (prev)
2309                 {
2310                     EnsureVisible( prev );
2311                     SelectItem( prev, unselect_others, extended_select );
2312                 }
2313             }
2314             break;
2315
2316         case WXK_RIGHT:
2317             // this works the same as the down arrow except that we
2318             // also expand the item if it wasn't expanded yet
2319             Expand(m_current);
2320             // fall through
2321
2322         case WXK_DOWN:
2323             {
2324                 if (IsExpanded(m_key_current) && HasChildren(m_key_current))
2325                 {
2326                     long cookie = 0;
2327                     wxTreeItemId child = GetFirstChild( m_key_current, cookie );
2328                     SelectItem( child, unselect_others, extended_select );
2329                     m_key_current=(wxGenericTreeItem*) child.m_pItem;
2330                     EnsureVisible( child );
2331                 }
2332                 else
2333                 {
2334                     wxTreeItemId next = GetNextSibling( m_key_current );
2335                     if (!next)
2336                     {
2337                         wxTreeItemId current = m_key_current;
2338                         while (current && !next)
2339                         {
2340                             current = GetParent( current );
2341                             if (current) next = GetNextSibling( current );
2342                         }
2343                     }
2344                     if (next)
2345                     {
2346                         SelectItem( next, unselect_others, extended_select );
2347                         m_key_current=(wxGenericTreeItem*) next.m_pItem;
2348                         EnsureVisible( next );
2349                     }
2350                 }
2351             }
2352             break;
2353
2354             // <End> selects the last visible tree item
2355         case WXK_END:
2356             {
2357                 wxTreeItemId last = GetRootItem();
2358
2359                 while ( last.IsOk() && IsExpanded(last) )
2360                 {
2361                     wxTreeItemId lastChild = GetLastChild(last);
2362
2363                     // it may happen if the item was expanded but then all of
2364                     // its children have been deleted - so IsExpanded() returned
2365                     // TRUE, but GetLastChild() returned invalid item
2366                     if ( !lastChild )
2367                         break;
2368
2369                     last = lastChild;
2370                 }
2371
2372                 if ( last.IsOk() )
2373                 {
2374                     EnsureVisible( last );
2375                     SelectItem( last, unselect_others, extended_select );
2376                 }
2377             }
2378             break;
2379
2380             // <Home> selects the root item
2381         case WXK_HOME:
2382             {
2383                 wxTreeItemId prev = GetRootItem();
2384                 if (!prev) break;
2385                 if (HasFlag(wxTR_HIDE_ROOT))
2386                 {
2387                     long dummy;
2388                     prev = GetFirstChild(prev, dummy);
2389                     if (!prev) break;
2390                 }
2391                 EnsureVisible( prev );
2392                 SelectItem( prev, unselect_others, extended_select );
2393             }
2394             break;
2395
2396         default:
2397             event.Skip();
2398     }
2399 }
2400
2401 wxTreeItemId wxGenericTreeCtrl::HitTest(const wxPoint& point, int& flags)
2402 {
2403     // JACS: removed wxYieldIfNeeded() because it can cause the window
2404     // to be deleted from under us if a close window event is pending
2405
2406     int w, h;
2407     GetSize(&w, &h);
2408     flags=0;
2409     if (point.x<0) flags |= wxTREE_HITTEST_TOLEFT;
2410     if (point.x>w) flags |= wxTREE_HITTEST_TORIGHT;
2411     if (point.y<0) flags |= wxTREE_HITTEST_ABOVE;
2412     if (point.y>h) flags |= wxTREE_HITTEST_BELOW;
2413     if (flags) return wxTreeItemId();
2414
2415     if (m_anchor == NULL)
2416     {
2417         flags = wxTREE_HITTEST_NOWHERE;
2418         return wxTreeItemId();
2419     }
2420
2421     wxClientDC dc(this);
2422     PrepareDC(dc);
2423     wxCoord x = dc.DeviceToLogicalX( point.x );
2424     wxCoord y = dc.DeviceToLogicalY( point.y );
2425     wxGenericTreeItem *hit =  m_anchor->HitTest(wxPoint(x, y),
2426                                                 this,
2427                                                 flags,
2428                                                 0 );
2429     if (hit == NULL)
2430     {
2431         flags = wxTREE_HITTEST_NOWHERE;
2432         return wxTreeItemId();
2433     }
2434     return hit;
2435 }
2436
2437 // get the bounding rectangle of the item (or of its label only)
2438 bool wxGenericTreeCtrl::GetBoundingRect(const wxTreeItemId& item,
2439                          wxRect& rect,
2440                          bool WXUNUSED(textOnly)) const
2441 {
2442     wxCHECK_MSG( item.IsOk(), FALSE, _T("invalid item in wxGenericTreeCtrl::GetBoundingRect") );
2443
2444     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
2445
2446     int startX, startY;
2447     GetViewStart(& startX, & startY);
2448
2449     rect.x = i->GetX() - startX*PIXELS_PER_UNIT;
2450     rect.y = i->GetY() - startY*PIXELS_PER_UNIT;
2451     rect.width = i->GetWidth();
2452     //rect.height = i->GetHeight();
2453     rect.height = GetLineHeight(i);
2454
2455     return TRUE;
2456 }
2457
2458 /* **** */
2459
2460 void wxGenericTreeCtrl::Edit( const wxTreeItemId& item )
2461 {
2462     if (!item.IsOk()) return;
2463
2464     m_currentEdit = (wxGenericTreeItem*) item.m_pItem;
2465
2466     wxTreeEvent te( wxEVT_COMMAND_TREE_BEGIN_LABEL_EDIT, GetId() );
2467     te.m_item = (long) m_currentEdit;
2468     te.SetEventObject( this );
2469     GetEventHandler()->ProcessEvent( te );
2470
2471     if (!te.IsAllowed()) return;
2472
2473     // We have to call this here because the label in
2474     // question might just have been added and no screen
2475     // update taken place.
2476     if (m_dirty) wxYieldIfNeeded();
2477
2478     wxString s = m_currentEdit->GetText();
2479     int x = m_currentEdit->GetX();
2480     int y = m_currentEdit->GetY();
2481     int w = m_currentEdit->GetWidth();
2482     int h = m_currentEdit->GetHeight();
2483
2484     int image_h = 0;
2485     int image_w = 0;
2486
2487     int image = m_currentEdit->GetCurrentImage();
2488     if ( image != NO_IMAGE )
2489     {
2490         if ( m_imageListNormal )
2491         {
2492             m_imageListNormal->GetSize( image, image_w, image_h );
2493             image_w += 4;
2494         }
2495         else
2496         {
2497             wxFAIL_MSG(_T("you must create an image list to use images!"));
2498         }
2499     }
2500     x += image_w;
2501     w -= image_w + 4; // I don't know why +4 is needed
2502
2503     wxClientDC dc(this);
2504     PrepareDC( dc );
2505     x = dc.LogicalToDeviceX( x );
2506     y = dc.LogicalToDeviceY( y );
2507
2508     wxTreeTextCtrl *text = new wxTreeTextCtrl(this, -1,
2509                                               &m_renameAccept,
2510                                               &m_renameRes,
2511                                               this,
2512                                               s,
2513                                               wxPoint(x-4,y-4),
2514                                               wxSize(w+11,h+8));
2515     text->SetFocus();
2516 }
2517
2518 void wxGenericTreeCtrl::OnRenameTimer()
2519 {
2520     Edit( m_current );
2521 }
2522
2523 void wxGenericTreeCtrl::OnRenameAccept()
2524 {
2525     // TODO if the validator fails this causes a crash
2526     wxTreeEvent le( wxEVT_COMMAND_TREE_END_LABEL_EDIT, GetId() );
2527     le.m_item = (long) m_currentEdit;
2528     le.SetEventObject( this );
2529     le.m_label = m_renameRes;
2530     GetEventHandler()->ProcessEvent( le );
2531
2532     if (!le.IsAllowed()) return;
2533
2534     SetItemText( m_currentEdit, m_renameRes );
2535 }
2536
2537 void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
2538 {
2539     if ( !m_anchor ) return;
2540
2541     // we process left mouse up event (enables in-place edit), right down
2542     // (pass to the user code), left dbl click (activate item) and
2543     // dragging/moving events for items drag-and-drop
2544     if ( !(event.LeftDown() ||
2545            event.LeftUp() ||
2546            event.RightDown() ||
2547            event.LeftDClick() ||
2548            event.Dragging() ||
2549            ((event.Moving() || event.RightUp()) && m_isDragging)) )
2550     {
2551         event.Skip();
2552
2553         return;
2554     }
2555
2556     wxClientDC dc(this);
2557     PrepareDC(dc);
2558     wxCoord x = dc.DeviceToLogicalX( event.GetX() );
2559     wxCoord y = dc.DeviceToLogicalY( event.GetY() );
2560
2561     int flags = 0;
2562     wxGenericTreeItem *item = m_anchor->HitTest( wxPoint(x,y),
2563                                                  this,
2564                                                  flags,
2565                                                  0 );
2566
2567     if ( event.Dragging() && !m_isDragging )
2568     {
2569         if (m_dragCount == 0)
2570             m_dragStart = wxPoint(x,y);
2571
2572         m_dragCount++;
2573
2574         if (m_dragCount != 3)
2575         {
2576             // wait until user drags a bit further...
2577             return;
2578         }
2579
2580         wxEventType command = event.RightIsDown()
2581                               ? wxEVT_COMMAND_TREE_BEGIN_RDRAG
2582                               : wxEVT_COMMAND_TREE_BEGIN_DRAG;
2583
2584         wxTreeEvent nevent( command, GetId() );
2585         nevent.m_item = (long) m_current;
2586         nevent.SetEventObject(this);
2587
2588         // by default the dragging is not supported, the user code must
2589         // explicitly allow the event for it to take place
2590         nevent.Veto();
2591
2592         if ( GetEventHandler()->ProcessEvent(nevent) && nevent.IsAllowed() )
2593         {
2594             // we're going to drag this item
2595             m_isDragging = TRUE;
2596
2597             // remember the old cursor because we will change it while
2598             // dragging
2599             m_oldCursor = m_cursor;
2600
2601             // in a single selection control, hide the selection temporarily
2602             if ( !(GetWindowStyleFlag() & wxTR_MULTIPLE) )
2603             {
2604                 m_oldSelection = (wxGenericTreeItem*) GetSelection().m_pItem;
2605
2606                 if ( m_oldSelection )
2607                 {
2608                     m_oldSelection->SetHilight(FALSE);
2609                     RefreshLine(m_oldSelection);
2610                 }
2611             }
2612
2613             CaptureMouse();
2614         }
2615     }
2616     else if ( event.Moving() )
2617     {
2618         if ( item != m_dropTarget )
2619         {
2620             // unhighlight the previous drop target
2621             DrawDropEffect(m_dropTarget);
2622
2623             m_dropTarget = item;
2624
2625             // highlight the current drop target if any
2626             DrawDropEffect(m_dropTarget);
2627
2628             wxYieldIfNeeded();
2629         }
2630     }
2631     else if ( (event.LeftUp() || event.RightUp()) && m_isDragging )
2632     {
2633         // erase the highlighting
2634         DrawDropEffect(m_dropTarget);
2635
2636         if ( m_oldSelection )
2637         {
2638             m_oldSelection->SetHilight(TRUE);
2639             RefreshLine(m_oldSelection);
2640             m_oldSelection = (wxGenericTreeItem *)NULL;
2641         }
2642
2643         // generate the drag end event
2644         wxTreeEvent event(wxEVT_COMMAND_TREE_END_DRAG, GetId());
2645
2646         event.m_item = (long) item;
2647         event.m_pointDrag = wxPoint(x, y);
2648         event.SetEventObject(this);
2649
2650         (void)GetEventHandler()->ProcessEvent(event);
2651
2652         m_isDragging = FALSE;
2653         m_dropTarget = (wxGenericTreeItem *)NULL;
2654
2655         ReleaseMouse();
2656
2657         SetCursor(m_oldCursor);
2658
2659         wxYieldIfNeeded();
2660     }
2661     else
2662     {
2663         // here we process only the messages which happen on tree items
2664
2665         m_dragCount = 0;
2666
2667         if (item == NULL) return;  /* we hit the blank area */
2668
2669         if ( event.RightDown() )
2670         {
2671             wxTreeEvent nevent(wxEVT_COMMAND_TREE_ITEM_RIGHT_CLICK, GetId());
2672             nevent.m_item = (long) item;
2673             nevent.m_code = 0;
2674             CalcScrolledPosition(x, y,
2675                                  &nevent.m_pointDrag.x,
2676                                  &nevent.m_pointDrag.y);
2677             nevent.SetEventObject(this);
2678             GetEventHandler()->ProcessEvent(nevent);
2679         }
2680         else if ( event.LeftUp() )
2681         {
2682             if ( m_lastOnSame )
2683             {
2684                 if ( (item == m_current) &&
2685                      (flags & wxTREE_HITTEST_ONITEMLABEL) &&
2686                      HasFlag(wxTR_EDIT_LABELS) )
2687                 {
2688                     if ( m_renameTimer->IsRunning() )
2689                         m_renameTimer->Stop();
2690
2691                     m_renameTimer->Start( 100, TRUE );
2692                 }
2693
2694                 m_lastOnSame = FALSE;
2695             }
2696         }
2697         else // !RightDown() && !LeftUp() ==> LeftDown() || LeftDClick()
2698         {
2699             if ( event.LeftDown() )
2700             {
2701                 m_lastOnSame = item == m_current;
2702             }
2703
2704             if ( flags & wxTREE_HITTEST_ONITEMBUTTON )
2705             {
2706                 // only toggle the item for a single click, double click on
2707                 // the button doesn't do anything (it toggles the item twice)
2708                 if ( event.LeftDown() )
2709                 {
2710                     Toggle( item );
2711                 }
2712
2713                 // don't select the item if the button was clicked
2714                 return;
2715             }
2716
2717             // how should the selection work for this event?
2718             bool is_multiple, extended_select, unselect_others;
2719             EventFlagsToSelType(GetWindowStyleFlag(),
2720                                 event.ShiftDown(),
2721                                 event.ControlDown(),
2722                                 is_multiple, extended_select, unselect_others);
2723
2724             SelectItem(item, unselect_others, extended_select);
2725
2726             // For some reason, Windows isn't recognizing a left double-click,
2727             // so we need to simulate it here.  Allow 200 milliseconds for now.
2728             if ( event.LeftDClick() )
2729             {
2730                 // double clicking should not start editing the item label
2731                 m_renameTimer->Stop();
2732                 m_lastOnSame = FALSE;
2733
2734                 // send activate event first
2735                 wxTreeEvent nevent( wxEVT_COMMAND_TREE_ITEM_ACTIVATED, GetId() );
2736                 nevent.m_item = (long) item;
2737                 nevent.m_code = 0;
2738                 CalcScrolledPosition(x, y,
2739                                      &nevent.m_pointDrag.x,
2740                                      &nevent.m_pointDrag.y);
2741                 nevent.SetEventObject( this );
2742                 if ( !GetEventHandler()->ProcessEvent( nevent ) )
2743                 {
2744                     // if the user code didn't process the activate event,
2745                     // handle it ourselves by toggling the item when it is
2746                     // double clicked
2747                     if ( item->HasPlus() )
2748                     {
2749                         Toggle(item);
2750                     }
2751                 }
2752             }
2753         }
2754     }
2755 }
2756
2757 void wxGenericTreeCtrl::OnIdle( wxIdleEvent &WXUNUSED(event) )
2758 {
2759     /* after all changes have been done to the tree control,
2760      * we actually redraw the tree when everything is over */
2761
2762     if (!m_dirty) return;
2763
2764     m_dirty = FALSE;
2765
2766     CalculatePositions();
2767     Refresh();
2768     AdjustMyScrollbars();
2769 }
2770
2771 void wxGenericTreeCtrl::CalculateSize( wxGenericTreeItem *item, wxDC &dc )
2772 {
2773     wxCoord text_w = 0;
2774     wxCoord text_h = 0;
2775
2776     if (item->IsBold())
2777         dc.SetFont(m_boldFont);
2778
2779     dc.GetTextExtent( item->GetText(), &text_w, &text_h );
2780     text_h+=2;
2781
2782     // restore normal font
2783     dc.SetFont( m_normalFont );
2784
2785     int image_h = 0;
2786     int image_w = 0;
2787     int image = item->GetCurrentImage();
2788     if ( image != NO_IMAGE )
2789     {
2790         if ( m_imageListNormal )
2791         {
2792             m_imageListNormal->GetSize( image, image_w, image_h );
2793             image_w += 4;
2794         }
2795     }
2796
2797     int total_h = (image_h > text_h) ? image_h : text_h;
2798
2799     if (total_h < 30)
2800         total_h += 2;            // at least 2 pixels
2801     else
2802         total_h += total_h/10;   // otherwise 10% extra spacing
2803
2804     item->SetHeight(total_h);
2805     if (total_h>m_lineHeight)
2806         m_lineHeight=total_h;
2807
2808     item->SetWidth(image_w+text_w+2);
2809 }
2810
2811 // -----------------------------------------------------------------------------
2812 // for developper : y is now the top of the level
2813 // not the middle of it !
2814 void wxGenericTreeCtrl::CalculateLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y )
2815 {
2816     int x = level*m_indent;
2817     if (!HasFlag(wxTR_HIDE_ROOT))
2818     {
2819         x += m_indent;
2820     }
2821     else if (level == 0)
2822     {
2823         // a hidden root is not evaluated, but its
2824         // children are always calculated
2825         goto Recurse;
2826     }
2827
2828     CalculateSize( item, dc );
2829
2830     // set its position
2831     item->SetX( x+m_spacing );
2832     item->SetY( y );
2833     y += GetLineHeight(item);
2834
2835     if ( !item->IsExpanded() )
2836     {
2837         // we don't need to calculate collapsed branches
2838         return;
2839     }
2840
2841   Recurse:
2842     wxArrayGenericTreeItems& children = item->GetChildren();
2843     size_t n, count = children.Count();
2844     ++level;
2845     for (n = 0; n < count; ++n )
2846         CalculateLevel( children[n], dc, level, y );  // recurse
2847 }
2848
2849 void wxGenericTreeCtrl::CalculatePositions()
2850 {
2851     if ( !m_anchor ) return;
2852
2853     wxClientDC dc(this);
2854     PrepareDC( dc );
2855
2856     dc.SetFont( m_normalFont );
2857
2858     dc.SetPen( m_dottedPen );
2859     //if(GetImageList() == NULL)
2860     // m_lineHeight = (int)(dc.GetCharHeight() + 4);
2861
2862     int y = 2;
2863     CalculateLevel( m_anchor, dc, 0, y ); // start recursion
2864 }
2865
2866 void wxGenericTreeCtrl::RefreshSubtree(wxGenericTreeItem *item)
2867 {
2868     if (m_dirty) return;
2869
2870     wxClientDC dc(this);
2871     PrepareDC(dc);
2872
2873     int cw = 0;
2874     int ch = 0;
2875     GetClientSize( &cw, &ch );
2876
2877     wxRect rect;
2878     rect.x = dc.LogicalToDeviceX( 0 );
2879     rect.width = cw;
2880     rect.y = dc.LogicalToDeviceY( item->GetY() );
2881     rect.height = ch;
2882
2883     Refresh( TRUE, &rect );
2884
2885     AdjustMyScrollbars();
2886 }
2887
2888 void wxGenericTreeCtrl::RefreshLine( wxGenericTreeItem *item )
2889 {
2890     if (m_dirty) return;
2891
2892     wxClientDC dc(this);
2893     PrepareDC( dc );
2894
2895     int cw = 0;
2896     int ch = 0;
2897     GetClientSize( &cw, &ch );
2898
2899     wxRect rect;
2900     rect.x = dc.LogicalToDeviceX( 0 );
2901     rect.y = dc.LogicalToDeviceY( item->GetY() );
2902     rect.width = cw;
2903     rect.height = GetLineHeight(item); //dc.GetCharHeight() + 6;
2904
2905     Refresh( TRUE, &rect );
2906 }
2907
2908 void wxGenericTreeCtrl::RefreshSelected()
2909 {
2910     // TODO: this is awfully inefficient, we should keep the list of all
2911     //       selected items internally, should be much faster
2912     if ( m_anchor )
2913         RefreshSelectedUnder(m_anchor);
2914 }
2915
2916 void wxGenericTreeCtrl::RefreshSelectedUnder(wxGenericTreeItem *item)
2917 {
2918     if ( item->IsSelected() )
2919         RefreshLine(item);
2920
2921     const wxArrayGenericTreeItems& children = item->GetChildren();
2922     size_t count = children.GetCount();
2923     for ( size_t n = 0; n < count; n++ )
2924     {
2925         RefreshSelectedUnder(children[n]);
2926     }
2927 }
2928
2929 #endif // wxUSE_TREECTRL