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                wxSystemSettings::GetSystemColour(wxSYS_COLOUR_HIGHLIGHT),
 619                wxSOLID);
 620
 621     m_imageListNormal = m_imageListButtons =
 622     m_imageListState = (wxImageList *) NULL;
 623     m_ownsImageListNormal = m_ownsImageListButtons =
 624     m_ownsImageListState = FALSE;
 625
 626     m_dragCount = 0;
 627     m_isDragging = FALSE;
 628     m_dropTarget = m_oldSelection = (wxGenericTreeItem *)NULL;
 629
 630     m_renameTimer = new wxTreeRenameTimer( this );
 631     m_lastOnSame = FALSE;
 632
 633     m_normalFont = wxSystemSettings::GetSystemFont( wxSYS_DEFAULT_GUI_FONT );
 634     m_boldFont = wxFont( m_normalFont.GetPointSize(),
 635                          m_normalFont.GetFamily(),
 636                          m_normalFont.GetStyle(),
 637                          wxBOLD,
 638                          m_normalFont.GetUnderlined());
 639 }
 640
 641 bool wxGenericTreeCtrl::Create(wxWindow *parent,
 642                                wxWindowID id,
 643                                const wxPoint& pos,
 644                                const wxSize& size,
 645                                long style,
 646                                const wxValidator &validator,
 647                                const wxString& name )
 648 {
 649     wxScrolledWindow::Create( parent, id, pos, size,
 650                               style|wxHSCROLL|wxVSCROLL, name );
 651
 652         // If the tree display has no buttons, but does have
 653         // connecting lines, we can use a narrower layout.
 654         // It may not be a good idea to force this...
 655     if (!HasButtons() && !HasFlag(wxTR_NO_LINES))
 656     {
 657         m_indent= 10;
 658         m_spacing = 10;
 659     }
 660
 661 #if wxUSE_VALIDATORS
 662     SetValidator( validator );
 663 #endif
 664
 665     SetBackgroundColour( wxSystemSettings::GetSystemColour( wxSYS_COLOUR_LISTBOX ) );
 666
 667 //  m_dottedPen = wxPen( "grey", 0, wxDOT );  too slow under XFree86
 668     m_dottedPen = wxPen( "grey", 0, 0 );
 669
 670     return TRUE;
 671 }
 672
 673 wxGenericTreeCtrl::~wxGenericTreeCtrl()
 674 {
 675     wxDELETE( m_hilightBrush );
 676
 677     DeleteAllItems();
 678
 679     delete m_renameTimer;
 680     if (m_ownsImageListNormal) delete m_imageListNormal;
 681     if (m_ownsImageListState) delete m_imageListState;
 682     if (m_ownsImageListButtons) delete m_imageListButtons;
 683 }
 684
 685 // -----------------------------------------------------------------------------
 686 // accessors
 687 // -----------------------------------------------------------------------------
 688
 689 size_t wxGenericTreeCtrl::GetCount() const
 690 {
 691     return m_anchor == NULL ? 0u : m_anchor->GetChildrenCount();
 692 }
 693
 694 void wxGenericTreeCtrl::SetIndent(unsigned int indent)
 695 {
 696     m_indent = indent;
 697     m_dirty = TRUE;
 698 }
 699
 700 void wxGenericTreeCtrl::SetSpacing(unsigned int spacing)
 701 {
 702     m_spacing = spacing;
 703     m_dirty = TRUE;
 704 }
 705
 706 size_t wxGenericTreeCtrl::GetChildrenCount(const wxTreeItemId& item, bool recursively)
 707 {
 708     wxCHECK_MSG( item.IsOk(), 0u, wxT("invalid tree item") );
 709
 710     return ((wxGenericTreeItem*) item.m_pItem)->GetChildrenCount(recursively);
 711 }
 712
 713 void wxGenericTreeCtrl::SetWindowStyle(const long styles)
 714 {
 715         // right now, just sets the styles.  Eventually, we may
 716         // want to update the inherited styles, but right now
 717         // none of the parents has updatable styles
 718     m_windowStyle = styles;
 719     m_dirty = TRUE;
 720 }
 721
 722 // -----------------------------------------------------------------------------
 723 // functions to work with tree items
 724 // -----------------------------------------------------------------------------
 725
 726 wxString wxGenericTreeCtrl::GetItemText(const wxTreeItemId& item) const
 727 {
 728     wxCHECK_MSG( item.IsOk(), wxT(""), wxT("invalid tree item") );
 729
 730     return ((wxGenericTreeItem*) item.m_pItem)->GetText();
 731 }
 732
 733 int wxGenericTreeCtrl::GetItemImage(const wxTreeItemId& item,
 734                              wxTreeItemIcon which) const
 735 {
 736     wxCHECK_MSG( item.IsOk(), -1, wxT("invalid tree item") );
 737
 738     return ((wxGenericTreeItem*) item.m_pItem)->GetImage(which);
 739 }
 740
 741 wxTreeItemData *wxGenericTreeCtrl::GetItemData(const wxTreeItemId& item) const
 742 {
 743     wxCHECK_MSG( item.IsOk(), NULL, wxT("invalid tree item") );
 744
 745     return ((wxGenericTreeItem*) item.m_pItem)->GetData();
 746 }
 747
 748 void wxGenericTreeCtrl::SetItemText(const wxTreeItemId& item, const wxString& text)
 749 {
 750     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 751
 752     wxClientDC dc(this);
 753     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 754     pItem->SetText(text);
 755     CalculateSize(pItem, dc);
 756     RefreshLine(pItem);
 757 }
 758
 759 void wxGenericTreeCtrl::SetItemImage(const wxTreeItemId& item,
 760                               int image,
 761                               wxTreeItemIcon which)
 762 {
 763     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 764
 765     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 766     pItem->SetImage(image, which);
 767
 768     wxClientDC dc(this);
 769     CalculateSize(pItem, dc);
 770     RefreshLine(pItem);
 771 }
 772
 773 void wxGenericTreeCtrl::SetItemData(const wxTreeItemId& item, wxTreeItemData *data)
 774 {
 775     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 776
 777     ((wxGenericTreeItem*) item.m_pItem)->SetData(data);
 778 }
 779
 780 void wxGenericTreeCtrl::SetItemHasChildren(const wxTreeItemId& item, bool has)
 781 {
 782     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 783
 784     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 785     pItem->SetHasPlus(has);
 786     RefreshLine(pItem);
 787 }
 788
 789 void wxGenericTreeCtrl::SetItemBold(const wxTreeItemId& item, bool bold)
 790 {
 791     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 792
 793     // avoid redrawing the tree if no real change
 794     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 795     if ( pItem->IsBold() != bold )
 796     {
 797         pItem->SetBold(bold);
 798         RefreshLine(pItem);
 799     }
 800 }
 801
 802 void wxGenericTreeCtrl::SetItemTextColour(const wxTreeItemId& item,
 803                                    const wxColour& col)
 804 {
 805     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 806
 807     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 808     pItem->Attr().SetTextColour(col);
 809     RefreshLine(pItem);
 810 }
 811
 812 void wxGenericTreeCtrl::SetItemBackgroundColour(const wxTreeItemId& item,
 813                                          const wxColour& col)
 814 {
 815     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 816
 817     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 818     pItem->Attr().SetBackgroundColour(col);
 819     RefreshLine(pItem);
 820 }
 821
 822 void wxGenericTreeCtrl::SetItemFont(const wxTreeItemId& item, const wxFont& font)
 823 {
 824     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 825
 826     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 827     pItem->Attr().SetFont(font);
 828     RefreshLine(pItem);
 829 }
 830
 831 bool wxGenericTreeCtrl::SetFont( const wxFont &font )
 832 {
 833     wxScrolledWindow::SetFont(font);
 834
 835     m_normalFont = font ;
 836     m_boldFont = wxFont( m_normalFont.GetPointSize(),
 837                             m_normalFont.GetFamily(),
 838                             m_normalFont.GetStyle(),
 839                             wxBOLD,
 840                             m_normalFont.GetUnderlined());
 841
 842     return TRUE;
 843 }
 844
 845
 846 // -----------------------------------------------------------------------------
 847 // item status inquiries
 848 // -----------------------------------------------------------------------------
 849
 850 bool wxGenericTreeCtrl::IsVisible(const wxTreeItemId& item) const
 851 {
 852     wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
 853
 854     // An item is only visible if it's not a descendant of a collapsed item
 855     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
 856     wxGenericTreeItem* parent = pItem->GetParent();
 857     while (parent)
 858     {
 859         if (!parent->IsExpanded())
 860             return FALSE;
 861         parent = parent->GetParent();
 862     }
 863
 864     int startX, startY;
 865     GetViewStart(& startX, & startY);
 866
 867     wxSize clientSize = GetClientSize();
 868
 869     wxRect rect;
 870     if (!GetBoundingRect(item, rect))
 871         return FALSE;
 872     if (rect.GetWidth() == 0 || rect.GetHeight() == 0)
 873         return FALSE;
 874     if (rect.GetBottom() < 0 || rect.GetTop() > clientSize.y)
 875         return FALSE;
 876     if (rect.GetRight() < 0 || rect.GetLeft() > clientSize.x)
 877         return FALSE;
 878
 879     return TRUE;
 880 }
 881
 882 bool wxGenericTreeCtrl::ItemHasChildren(const wxTreeItemId& item) const
 883 {
 884     wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
 885
 886     return !((wxGenericTreeItem*) item.m_pItem)->GetChildren().IsEmpty();
 887 }
 888
 889 bool wxGenericTreeCtrl::IsExpanded(const wxTreeItemId& item) const
 890 {
 891     wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
 892
 893     return ((wxGenericTreeItem*) item.m_pItem)->IsExpanded();
 894 }
 895
 896 bool wxGenericTreeCtrl::IsSelected(const wxTreeItemId& item) const
 897 {
 898     wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
 899
 900     return ((wxGenericTreeItem*) item.m_pItem)->IsSelected();
 901 }
 902
 903 bool wxGenericTreeCtrl::IsBold(const wxTreeItemId& item) const
 904 {
 905     wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
 906
 907     return ((wxGenericTreeItem*) item.m_pItem)->IsBold();
 908 }
 909
 910 // -----------------------------------------------------------------------------
 911 // navigation
 912 // -----------------------------------------------------------------------------
 913
 914 wxTreeItemId wxGenericTreeCtrl::GetParent(const wxTreeItemId& item) const
 915 {
 916     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 917
 918     return ((wxGenericTreeItem*) item.m_pItem)->GetParent();
 919 }
 920
 921 wxTreeItemId wxGenericTreeCtrl::GetFirstChild(const wxTreeItemId& item, long& cookie) const
 922 {
 923     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 924
 925     cookie = 0;
 926     return GetNextChild(item, cookie);
 927 }
 928
 929 wxTreeItemId wxGenericTreeCtrl::GetNextChild(const wxTreeItemId& item, long& cookie) const
 930 {
 931     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 932
 933     wxArrayGenericTreeItems& children = ((wxGenericTreeItem*) item.m_pItem)->GetChildren();
 934     if ( (size_t)cookie < children.Count() )
 935     {
 936         return children.Item((size_t)cookie++);
 937     }
 938     else
 939     {
 940         // there are no more of them
 941         return wxTreeItemId();
 942     }
 943 }
 944
 945 wxTreeItemId wxGenericTreeCtrl::GetLastChild(const wxTreeItemId& item) const
 946 {
 947     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 948
 949     wxArrayGenericTreeItems& children = ((wxGenericTreeItem*) item.m_pItem)->GetChildren();
 950     return (children.IsEmpty() ? wxTreeItemId() : wxTreeItemId(children.Last()));
 951 }
 952
 953 wxTreeItemId wxGenericTreeCtrl::GetNextSibling(const wxTreeItemId& item) const
 954 {
 955     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 956
 957     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
 958     wxGenericTreeItem *parent = i->GetParent();
 959     if ( parent == NULL )
 960     {
 961         // root item doesn't have any siblings
 962         return wxTreeItemId();
 963     }
 964
 965     wxArrayGenericTreeItems& siblings = parent->GetChildren();
 966     int index = siblings.Index(i);
 967     wxASSERT( index != wxNOT_FOUND ); // I'm not a child of my parent?
 968
 969     size_t n = (size_t)(index + 1);
 970     return n == siblings.Count() ? wxTreeItemId() : wxTreeItemId(siblings[n]);
 971 }
 972
 973 wxTreeItemId wxGenericTreeCtrl::GetPrevSibling(const wxTreeItemId& item) const
 974 {
 975     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 976
 977     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
 978     wxGenericTreeItem *parent = i->GetParent();
 979     if ( parent == NULL )
 980     {
 981         // root item doesn't have any siblings
 982         return wxTreeItemId();
 983     }
 984
 985     wxArrayGenericTreeItems& siblings = parent->GetChildren();
 986     int index = siblings.Index(i);
 987     wxASSERT( index != wxNOT_FOUND ); // I'm not a child of my parent?
 988
 989     return index == 0 ? wxTreeItemId()
 990                       : wxTreeItemId(siblings[(size_t)(index - 1)]);
 991 }
 992
 993 // Only for internal use right now, but should probably be public
 994 wxTreeItemId wxGenericTreeCtrl::GetNext(const wxTreeItemId& item) const
 995 {
 996     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 997
 998     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
 999
1000     // First see if there are any children.
1001     wxArrayGenericTreeItems& children = i->GetChildren();
1002     if (children.GetCount() > 0)
1003     {
1004          return children.Item(0);
1005     }
1006     else
1007     {
1008          // Try a sibling of this or ancestor instead
1009          wxTreeItemId p = item;
1010          wxTreeItemId toFind;
1011          do
1012          {
1013               toFind = GetNextSibling(p);
1014               p = GetParent(p);
1015          } while (p.IsOk() && !toFind.IsOk());
1016          return toFind;
1017     }
1018 }
1019
1020 wxTreeItemId wxGenericTreeCtrl::GetPrev(const wxTreeItemId& item) const
1021 {
1022     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
1023
1024     wxFAIL_MSG(wxT("not implemented"));
1025
1026     return wxTreeItemId();
1027 }
1028
1029 wxTreeItemId wxGenericTreeCtrl::GetFirstVisibleItem() const
1030 {
1031     wxTreeItemId id = GetRootItem();
1032     if (!id.IsOk())
1033         return id;
1034
1035     do
1036     {
1037         if (IsVisible(id))
1038               return id;
1039         id = GetNext(id);
1040     } while (id.IsOk());
1041
1042     return wxTreeItemId();
1043 }
1044
1045 wxTreeItemId wxGenericTreeCtrl::GetNextVisible(const wxTreeItemId& item) const
1046 {
1047     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
1048
1049     wxTreeItemId id = item;
1050     if (id.IsOk())
1051     {
1052         while (id = GetNext(id), id.IsOk())
1053         {
1054             if (IsVisible(id))
1055                 return id;
1056         }
1057     }
1058     return wxTreeItemId();
1059 }
1060
1061 wxTreeItemId wxGenericTreeCtrl::GetPrevVisible(const wxTreeItemId& item) const
1062 {
1063     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
1064
1065     wxFAIL_MSG(wxT("not implemented"));
1066
1067     return wxTreeItemId();
1068 }
1069
1070 // -----------------------------------------------------------------------------
1071 // operations
1072 // -----------------------------------------------------------------------------
1073
1074 wxTreeItemId wxGenericTreeCtrl::DoInsertItem(const wxTreeItemId& parentId,
1075                                       size_t previous,
1076                                       const wxString& text,
1077                                       int image, int selImage,
1078                                       wxTreeItemData *data)
1079 {
1080     wxGenericTreeItem *parent = (wxGenericTreeItem*) parentId.m_pItem;
1081     if ( !parent )
1082     {
1083         // should we give a warning here?
1084         return AddRoot(text, image, selImage, data);
1085     }
1086
1087     m_dirty = TRUE;     // do this first so stuff below doesn't cause flicker
1088
1089     wxClientDC dc(this);
1090     wxGenericTreeItem *item =
1091         new wxGenericTreeItem( parent, text, dc, image, selImage, data );
1092
1093     if ( data != NULL )
1094     {
1095         data->m_pItem = (long) item;
1096     }
1097
1098     parent->Insert( item, previous );
1099
1100     return item;
1101 }
1102
1103 wxTreeItemId wxGenericTreeCtrl::AddRoot(const wxString& text,
1104                                  int image, int selImage,
1105                                  wxTreeItemData *data)
1106 {
1107     wxCHECK_MSG( !m_anchor, wxTreeItemId(), wxT("tree can have only one root") );
1108
1109     m_dirty = TRUE;     // do this first so stuff below doesn't cause flicker
1110
1111     wxClientDC dc(this);
1112     m_anchor = new wxGenericTreeItem((wxGenericTreeItem *)NULL, text, dc,
1113                                    image, selImage, data);
1114     if (HasFlag(wxTR_HIDE_ROOT))
1115     {
1116         // if root is hidden, make sure we can navigate
1117         // into children
1118         m_anchor->SetHasPlus();
1119         Expand(m_anchor);
1120     }
1121     if ( data != NULL )
1122     {
1123         data->m_pItem = (long) m_anchor;
1124     }
1125
1126     if (!HasFlag(wxTR_MULTIPLE))
1127     {
1128         m_current = m_key_current = m_anchor;
1129         m_current->SetHilight( TRUE );
1130     }
1131
1132     return m_anchor;
1133 }
1134
1135 wxTreeItemId wxGenericTreeCtrl::PrependItem(const wxTreeItemId& parent,
1136                                      const wxString& text,
1137                                      int image, int selImage,
1138                                      wxTreeItemData *data)
1139 {
1140     return DoInsertItem(parent, 0u, text, image, selImage, data);
1141 }
1142
1143 wxTreeItemId wxGenericTreeCtrl::InsertItem(const wxTreeItemId& parentId,
1144                                     const wxTreeItemId& idPrevious,
1145                                     const wxString& text,
1146                                     int image, int selImage,
1147                                     wxTreeItemData *data)
1148 {
1149     wxGenericTreeItem *parent = (wxGenericTreeItem*) parentId.m_pItem;
1150     if ( !parent )
1151     {
1152         // should we give a warning here?
1153         return AddRoot(text, image, selImage, data);
1154     }
1155
1156     int index = parent->GetChildren().Index((wxGenericTreeItem*) idPrevious.m_pItem);
1157     wxASSERT_MSG( index != wxNOT_FOUND,
1158                   wxT("previous item in wxGenericTreeCtrl::InsertItem() is not a sibling") );
1159
1160     return DoInsertItem(parentId, (size_t)++index, text, image, selImage, data);
1161 }
1162
1163 wxTreeItemId wxGenericTreeCtrl::InsertItem(const wxTreeItemId& parentId,
1164                                     size_t before,
1165                                     const wxString& text,
1166                                     int image, int selImage,
1167                                     wxTreeItemData *data)
1168 {
1169     wxGenericTreeItem *parent = (wxGenericTreeItem*) parentId.m_pItem;
1170     if ( !parent )
1171     {
1172         // should we give a warning here?
1173         return AddRoot(text, image, selImage, data);
1174     }
1175
1176     return DoInsertItem(parentId, before, text, image, selImage, data);
1177 }
1178
1179 wxTreeItemId wxGenericTreeCtrl::AppendItem(const wxTreeItemId& parentId,
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( parent, parent->GetChildren().Count(), text,
1192                          image, selImage, data);
1193 }
1194
1195 void wxGenericTreeCtrl::SendDeleteEvent(wxGenericTreeItem *item)
1196 {
1197     wxTreeEvent event( wxEVT_COMMAND_TREE_DELETE_ITEM, GetId() );
1198     event.m_item = (long) item;
1199     event.SetEventObject( this );
1200     ProcessEvent( event );
1201 }
1202
1203 void wxGenericTreeCtrl::DeleteChildren(const wxTreeItemId& itemId)
1204 {
1205     m_dirty = TRUE;     // do this first so stuff below doesn't cause flicker
1206
1207     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1208     item->DeleteChildren(this);
1209 }
1210
1211 void wxGenericTreeCtrl::Delete(const wxTreeItemId& itemId)
1212 {
1213     m_dirty = TRUE;     // do this first so stuff below doesn't cause flicker
1214
1215     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1216
1217     // don't stay with invalid m_key_current or we will crash in
1218     // the next call to OnChar()
1219     bool changeKeyCurrent = FALSE;
1220     wxGenericTreeItem *itemKey = m_key_current;
1221     while ( itemKey )
1222     {
1223         if ( itemKey == item )
1224         {
1225             // m_key_current is a descendant of the item being deleted
1226             changeKeyCurrent = TRUE;
1227             break;
1228         }
1229         itemKey = itemKey->GetParent();
1230     }
1231
1232     wxGenericTreeItem *parent = item->GetParent();
1233     if ( parent )
1234     {
1235         parent->GetChildren().Remove( item );  // remove by value
1236     }
1237
1238     if ( changeKeyCurrent )
1239     {
1240         // may be NULL or not
1241         m_key_current = parent;
1242     }
1243
1244     item->DeleteChildren(this);
1245     SendDeleteEvent(item);
1246     delete item;
1247 }
1248
1249 void wxGenericTreeCtrl::DeleteAllItems()
1250 {
1251     if ( m_anchor )
1252     {
1253         m_dirty = TRUE;
1254
1255         m_anchor->DeleteChildren(this);
1256         delete m_anchor;
1257
1258         m_anchor = NULL;
1259     }
1260 }
1261
1262 void wxGenericTreeCtrl::Expand(const wxTreeItemId& itemId)
1263 {
1264     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1265
1266     wxCHECK_RET( item, _T("invalid item in wxGenericTreeCtrl::Expand") );
1267
1268     if ( !item->HasPlus() )
1269         return;
1270
1271     if ( item->IsExpanded() )
1272         return;
1273
1274     wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_EXPANDING, GetId() );
1275     event.m_item = (long) item;
1276     event.SetEventObject( this );
1277
1278     if ( ProcessEvent( event ) && !event.IsAllowed() )
1279     {
1280         // cancelled by program
1281         return;
1282     }
1283
1284     item->Expand();
1285     CalculatePositions();
1286
1287     RefreshSubtree(item);
1288
1289     event.SetEventType(wxEVT_COMMAND_TREE_ITEM_EXPANDED);
1290     ProcessEvent( event );
1291 }
1292
1293 void wxGenericTreeCtrl::ExpandAll(const wxTreeItemId& item)
1294 {
1295     Expand(item);
1296     if ( IsExpanded(item) )
1297     {
1298         long cookie;
1299         wxTreeItemId child = GetFirstChild(item, cookie);
1300         while ( child.IsOk() )
1301         {
1302             ExpandAll(child);
1303
1304             child = GetNextChild(item, cookie);
1305         }
1306     }
1307 }
1308
1309 void wxGenericTreeCtrl::Collapse(const wxTreeItemId& itemId)
1310 {
1311     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1312
1313     if ( !item->IsExpanded() )
1314         return;
1315
1316     wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_COLLAPSING, GetId() );
1317     event.m_item = (long) item;
1318     event.SetEventObject( this );
1319     if ( ProcessEvent( event ) && !event.IsAllowed() )
1320     {
1321         // cancelled by program
1322         return;
1323     }
1324
1325     item->Collapse();
1326
1327 #if 0  // TODO why should items be collapsed recursively?
1328     wxArrayGenericTreeItems& children = item->GetChildren();
1329     size_t count = children.Count();
1330     for ( size_t n = 0; n < count; n++ )
1331     {
1332         Collapse(children[n]);
1333     }
1334 #endif
1335
1336     CalculatePositions();
1337
1338     RefreshSubtree(item);
1339
1340     event.SetEventType(wxEVT_COMMAND_TREE_ITEM_COLLAPSED);
1341     ProcessEvent( event );
1342 }
1343
1344 void wxGenericTreeCtrl::CollapseAndReset(const wxTreeItemId& item)
1345 {
1346     Collapse(item);
1347     DeleteChildren(item);
1348 }
1349
1350 void wxGenericTreeCtrl::Toggle(const wxTreeItemId& itemId)
1351 {
1352     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1353
1354     if (item->IsExpanded())
1355         Collapse(itemId);
1356     else
1357         Expand(itemId);
1358 }
1359
1360 void wxGenericTreeCtrl::Unselect()
1361 {
1362     if (m_current)
1363     {
1364         m_current->SetHilight( FALSE );
1365         RefreshLine( m_current );
1366     }
1367 }
1368
1369 void wxGenericTreeCtrl::UnselectAllChildren(wxGenericTreeItem *item)
1370 {
1371     if (item->IsSelected())
1372     {
1373         item->SetHilight(FALSE);
1374         RefreshLine(item);
1375     }
1376
1377     if (item->HasChildren())
1378     {
1379         wxArrayGenericTreeItems& children = item->GetChildren();
1380         size_t count = children.Count();
1381         for ( size_t n = 0; n < count; ++n )
1382         {
1383             UnselectAllChildren(children[n]);
1384         }
1385     }
1386 }
1387
1388 void wxGenericTreeCtrl::UnselectAll()
1389 {
1390     UnselectAllChildren((wxGenericTreeItem*) GetRootItem().m_pItem);
1391 }
1392
1393 // Recursive function !
1394 // To stop we must have crt_item<last_item
1395 // Algorithm :
1396 // Tag all next children, when no more children,
1397 // Move to parent (not to tag)
1398 // Keep going... if we found last_item, we stop.
1399 bool wxGenericTreeCtrl::TagNextChildren(wxGenericTreeItem *crt_item, wxGenericTreeItem *last_item, bool select)
1400 {
1401     wxGenericTreeItem *parent = crt_item->GetParent();
1402
1403     if (parent == NULL) // This is root item
1404         return TagAllChildrenUntilLast(crt_item, last_item, select);
1405
1406     wxArrayGenericTreeItems& children = parent->GetChildren();
1407     int index = children.Index(crt_item);
1408     wxASSERT( index != wxNOT_FOUND ); // I'm not a child of my parent?
1409
1410     size_t count = children.Count();
1411     for (size_t n=(size_t)(index+1); n<count; ++n)
1412     {
1413         if (TagAllChildrenUntilLast(children[n], last_item, select)) return TRUE;
1414     }
1415
1416     return TagNextChildren(parent, last_item, select);
1417 }
1418
1419 bool wxGenericTreeCtrl::TagAllChildrenUntilLast(wxGenericTreeItem *crt_item, wxGenericTreeItem *last_item, bool select)
1420 {
1421     crt_item->SetHilight(select);
1422     RefreshLine(crt_item);
1423
1424     if (crt_item==last_item)
1425         return TRUE;
1426
1427     if (crt_item->HasChildren())
1428     {
1429         wxArrayGenericTreeItems& children = crt_item->GetChildren();
1430         size_t count = children.Count();
1431         for ( size_t n = 0; n < count; ++n )
1432         {
1433             if (TagAllChildrenUntilLast(children[n], last_item, select))
1434                 return TRUE;
1435         }
1436     }
1437
1438   return FALSE;
1439 }
1440
1441 void wxGenericTreeCtrl::SelectItemRange(wxGenericTreeItem *item1, wxGenericTreeItem *item2)
1442 {
1443     // item2 is not necessary after item1
1444     wxGenericTreeItem *first=NULL, *last=NULL;
1445
1446     // choice first' and 'last' between item1 and item2
1447     if (item1->GetY()<item2->GetY())
1448     {
1449         first=item1;
1450         last=item2;
1451     }
1452     else
1453     {
1454         first=item2;
1455         last=item1;
1456     }
1457
1458     bool select = m_current->IsSelected();
1459
1460     if ( TagAllChildrenUntilLast(first,last,select) )
1461         return;
1462
1463     TagNextChildren(first,last,select);
1464 }
1465
1466 void wxGenericTreeCtrl::SelectItem(const wxTreeItemId& itemId,
1467                             bool unselect_others,
1468                             bool extended_select)
1469 {
1470     wxCHECK_RET( itemId.IsOk(), wxT("invalid tree item") );
1471
1472     bool is_single=!(GetWindowStyleFlag() & wxTR_MULTIPLE);
1473     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1474
1475     //wxCHECK_RET( ( (!unselect_others) && is_single),
1476     //           wxT("this is a single selection tree") );
1477
1478     // to keep going anyhow !!!
1479     if (is_single)
1480     {
1481         if (item->IsSelected())
1482             return; // nothing to do
1483         unselect_others = TRUE;
1484         extended_select = FALSE;
1485     }
1486     else if ( unselect_others && item->IsSelected() )
1487     {
1488         // selection change if there is more than one item currently selected
1489         wxArrayTreeItemIds selected_items;
1490         if ( GetSelections(selected_items) == 1 )
1491             return;
1492     }
1493
1494     wxTreeEvent event( wxEVT_COMMAND_TREE_SEL_CHANGING, GetId() );
1495     event.m_item = (long) item;
1496     event.m_itemOld = (long) m_current;
1497     event.SetEventObject( this );
1498     // TODO : Here we don't send any selection mode yet !
1499
1500     if ( GetEventHandler()->ProcessEvent( event ) && !event.IsAllowed() )
1501         return;
1502
1503     wxTreeItemId parent = GetParent( itemId );
1504     while (parent.IsOk())
1505     {
1506         if (!IsExpanded(parent))
1507             Expand( parent );
1508
1509         parent = GetParent( parent );
1510     }
1511
1512     EnsureVisible( itemId );
1513
1514     // ctrl press
1515     if (unselect_others)
1516     {
1517         if (is_single) Unselect(); // to speed up thing
1518         else UnselectAll();
1519     }
1520
1521     // shift press
1522     if (extended_select)
1523     {
1524         if ( !m_current )
1525         {
1526             m_current = m_key_current = (wxGenericTreeItem*) GetRootItem().m_pItem;
1527         }
1528
1529         // don't change the mark (m_current)
1530         SelectItemRange(m_current, item);
1531     }
1532     else
1533     {
1534         bool select=TRUE; // the default
1535
1536         // Check if we need to toggle hilight (ctrl mode)
1537         if (!unselect_others)
1538             select=!item->IsSelected();
1539
1540         m_current = m_key_current = item;
1541         m_current->SetHilight(select);
1542         RefreshLine( m_current );
1543     }
1544
1545     event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGED);
1546     GetEventHandler()->ProcessEvent( event );
1547 }
1548
1549 void wxGenericTreeCtrl::FillArray(wxGenericTreeItem *item,
1550                            wxArrayTreeItemIds &array) const
1551 {
1552     if ( item->IsSelected() )
1553         array.Add(wxTreeItemId(item));
1554
1555     if ( item->HasChildren() )
1556     {
1557         wxArrayGenericTreeItems& children = item->GetChildren();
1558         size_t count = children.GetCount();
1559         for ( size_t n = 0; n < count; ++n )
1560             FillArray(children[n], array);
1561     }
1562 }
1563
1564 size_t wxGenericTreeCtrl::GetSelections(wxArrayTreeItemIds &array) const
1565 {
1566     array.Empty();
1567     wxTreeItemId idRoot = GetRootItem();
1568     if ( idRoot.IsOk() )
1569     {
1570         FillArray((wxGenericTreeItem*) idRoot.m_pItem, array);
1571     }
1572     //else: the tree is empty, so no selections
1573
1574     return array.Count();
1575 }
1576
1577 void wxGenericTreeCtrl::EnsureVisible(const wxTreeItemId& item)
1578 {
1579     if (!item.IsOk()) return;
1580
1581     wxGenericTreeItem *gitem = (wxGenericTreeItem*) item.m_pItem;
1582
1583     // first expand all parent branches
1584     wxGenericTreeItem *parent = gitem->GetParent();
1585     while ( parent )
1586     {
1587         Expand(parent);
1588         parent = parent->GetParent();
1589     }
1590
1591     //if (parent) CalculatePositions();
1592
1593     ScrollTo(item);
1594 }
1595
1596 void wxGenericTreeCtrl::ScrollTo(const wxTreeItemId &item)
1597 {
1598     if (!item.IsOk()) return;
1599
1600     // We have to call this here because the label in
1601     // question might just have been added and no screen
1602     // update taken place.
1603     if (m_dirty) wxYieldIfNeeded();
1604
1605     wxGenericTreeItem *gitem = (wxGenericTreeItem*) item.m_pItem;
1606
1607     // now scroll to the item
1608     int item_y = gitem->GetY();
1609
1610     int start_x = 0;
1611     int start_y = 0;
1612     GetViewStart( &start_x, &start_y );
1613     start_y *= PIXELS_PER_UNIT;
1614
1615     int client_h = 0;
1616     int client_w = 0;
1617     GetClientSize( &client_w, &client_h );
1618
1619     if (item_y < start_y+3)
1620     {
1621         // going down
1622         int x = 0;
1623         int y = 0;
1624         m_anchor->GetSize( x, y, this );
1625         y += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1626         x += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1627         int x_pos = GetScrollPos( wxHORIZONTAL );
1628         // Item should appear at top
1629         SetScrollbars( PIXELS_PER_UNIT, PIXELS_PER_UNIT, x/PIXELS_PER_UNIT, y/PIXELS_PER_UNIT, x_pos, item_y/PIXELS_PER_UNIT );
1630     }
1631     else if (item_y+GetLineHeight(gitem) > start_y+client_h)
1632     {
1633         // going up
1634         int x = 0;
1635         int y = 0;
1636         m_anchor->GetSize( x, y, this );
1637         y += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1638         x += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1639         item_y += PIXELS_PER_UNIT+2;
1640         int x_pos = GetScrollPos( wxHORIZONTAL );
1641         // Item should appear at bottom
1642         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 );
1643     }
1644 }
1645
1646 // FIXME: tree sorting functions are not reentrant and not MT-safe!
1647 static wxGenericTreeCtrl *s_treeBeingSorted = NULL;
1648
1649 static int LINKAGEMODE tree_ctrl_compare_func(wxGenericTreeItem **item1,
1650                                   wxGenericTreeItem **item2)
1651 {
1652     wxCHECK_MSG( s_treeBeingSorted, 0, wxT("bug in wxGenericTreeCtrl::SortChildren()") );
1653
1654     return s_treeBeingSorted->OnCompareItems(*item1, *item2);
1655 }
1656
1657 int wxGenericTreeCtrl::OnCompareItems(const wxTreeItemId& item1,
1658                                const wxTreeItemId& item2)
1659 {
1660     return wxStrcmp(GetItemText(item1), GetItemText(item2));
1661 }
1662
1663 void wxGenericTreeCtrl::SortChildren(const wxTreeItemId& itemId)
1664 {
1665     wxCHECK_RET( itemId.IsOk(), wxT("invalid tree item") );
1666
1667     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
1668
1669     wxCHECK_RET( !s_treeBeingSorted,
1670                  wxT("wxGenericTreeCtrl::SortChildren is not reentrant") );
1671
1672     wxArrayGenericTreeItems& children = item->GetChildren();
1673     if ( children.Count() > 1 )
1674     {
1675         m_dirty = TRUE;
1676
1677         s_treeBeingSorted = this;
1678         children.Sort(tree_ctrl_compare_func);
1679         s_treeBeingSorted = NULL;
1680     }
1681     //else: don't make the tree dirty as nothing changed
1682 }
1683
1684 wxImageList *wxGenericTreeCtrl::GetImageList() const
1685 {
1686     return m_imageListNormal;
1687 }
1688
1689 wxImageList *wxGenericTreeCtrl::GetButtonsImageList() const
1690 {
1691     return m_imageListButtons;
1692 }
1693
1694 wxImageList *wxGenericTreeCtrl::GetStateImageList() const
1695 {
1696     return m_imageListState;
1697 }
1698
1699 void wxGenericTreeCtrl::CalculateLineHeight()
1700 {
1701     wxClientDC dc(this);
1702     m_lineHeight = (int)(dc.GetCharHeight() + 4);
1703
1704     if ( m_imageListNormal )
1705     {
1706         // Calculate a m_lineHeight value from the normal Image sizes.
1707         // May be toggle off. Then wxGenericTreeCtrl will spread when
1708         // necessary (which might look ugly).
1709         int n = m_imageListNormal->GetImageCount();
1710         for (int i = 0; i < n ; i++)
1711         {
1712             int width = 0, height = 0;
1713             m_imageListNormal->GetSize(i, width, height);
1714             if (height > m_lineHeight) m_lineHeight = height;
1715         }
1716     }
1717
1718     if (m_imageListButtons)
1719     {
1720         // Calculate a m_lineHeight value from the Button image sizes.
1721         // May be toggle off. Then wxGenericTreeCtrl will spread when
1722         // necessary (which might look ugly).
1723         int n = m_imageListButtons->GetImageCount();
1724         for (int i = 0; i < n ; i++)
1725         {
1726             int width = 0, height = 0;
1727             m_imageListButtons->GetSize(i, width, height);
1728             if (height > m_lineHeight) m_lineHeight = height;
1729         }
1730     }
1731
1732     if (m_lineHeight < 30)
1733         m_lineHeight += 2;                 // at least 2 pixels
1734     else
1735         m_lineHeight += m_lineHeight/10;   // otherwise 10% extra spacing
1736 }
1737
1738 void wxGenericTreeCtrl::SetImageList(wxImageList *imageList)
1739 {
1740     if (m_ownsImageListNormal) delete m_imageListNormal;
1741     m_imageListNormal = imageList;
1742     m_ownsImageListNormal = FALSE;
1743     m_dirty = TRUE;
1744     CalculateLineHeight();
1745 }
1746
1747 void wxGenericTreeCtrl::SetStateImageList(wxImageList *imageList)
1748 {
1749     if (m_ownsImageListState) delete m_imageListState;
1750     m_imageListState = imageList;
1751     m_ownsImageListState = FALSE;
1752 }
1753
1754 void wxGenericTreeCtrl::SetButtonsImageList(wxImageList *imageList)
1755 {
1756     if (m_ownsImageListButtons) delete m_imageListButtons;
1757     m_imageListButtons = imageList;
1758     m_ownsImageListButtons = FALSE;
1759     m_dirty = TRUE;
1760     CalculateLineHeight();
1761 }
1762
1763 void wxGenericTreeCtrl::AssignImageList(wxImageList *imageList)
1764 {
1765     SetImageList(imageList);
1766     m_ownsImageListNormal = TRUE;
1767 }
1768
1769 void wxGenericTreeCtrl::AssignStateImageList(wxImageList *imageList)
1770 {
1771     SetStateImageList(imageList);
1772     m_ownsImageListState = TRUE;
1773 }
1774
1775 void wxGenericTreeCtrl::AssignButtonsImageList(wxImageList *imageList)
1776 {
1777     SetButtonsImageList(imageList);
1778     m_ownsImageListButtons = TRUE;
1779 }
1780
1781 // -----------------------------------------------------------------------------
1782 // helpers
1783 // -----------------------------------------------------------------------------
1784
1785 void wxGenericTreeCtrl::AdjustMyScrollbars()
1786 {
1787     if (m_anchor)
1788     {
1789         int x = 0, y = 0;
1790         m_anchor->GetSize( x, y, this );
1791         y += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1792         x += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
1793         int x_pos = GetScrollPos( wxHORIZONTAL );
1794         int y_pos = GetScrollPos( wxVERTICAL );
1795         SetScrollbars( PIXELS_PER_UNIT, PIXELS_PER_UNIT, x/PIXELS_PER_UNIT, y/PIXELS_PER_UNIT, x_pos, y_pos );
1796     }
1797     else
1798     {
1799         SetScrollbars( 0, 0, 0, 0 );
1800     }
1801 }
1802
1803 int wxGenericTreeCtrl::GetLineHeight(wxGenericTreeItem *item) const
1804 {
1805     if (GetWindowStyleFlag() & wxTR_HAS_VARIABLE_ROW_HEIGHT)
1806         return item->GetHeight();
1807     else
1808         return m_lineHeight;
1809 }
1810
1811 void wxGenericTreeCtrl::PaintItem(wxGenericTreeItem *item, wxDC& dc)
1812 {
1813     // TODO implement "state" icon on items
1814
1815     wxTreeItemAttr *attr = item->GetAttributes();
1816     if ( attr && attr->HasFont() )
1817         dc.SetFont(attr->GetFont());
1818     else if (item->IsBold())
1819         dc.SetFont(m_boldFont);
1820
1821     long text_w = 0, text_h = 0;
1822     dc.GetTextExtent( item->GetText(), &text_w, &text_h );
1823
1824     int image_h = 0, image_w = 0;
1825     int image = item->GetCurrentImage();
1826     if ( image != NO_IMAGE )
1827     {
1828         if ( m_imageListNormal )
1829         {
1830             m_imageListNormal->GetSize( image, image_w, image_h );
1831             image_w += 4;
1832         }
1833         else
1834         {
1835             image = NO_IMAGE;
1836         }
1837     }
1838
1839     int total_h = GetLineHeight(item);
1840
1841     bool paintBg = item->IsSelected() && m_hasFocus;
1842     if ( paintBg )
1843     {
1844         dc.SetBrush(*m_hilightBrush);
1845     }
1846     else
1847     {
1848         wxColour colBg;
1849         if ( attr && attr->HasBackgroundColour() )
1850             colBg = attr->GetBackgroundColour();
1851         else
1852             colBg = m_backgroundColour;
1853         dc.SetBrush(wxBrush(colBg, wxSOLID));
1854     }
1855
1856     int offset = HasFlag(wxTR_ROW_LINES) ? 1 : 0;
1857
1858     if ( item->IsSelected() && image != NO_IMAGE)
1859     {
1860         // If it's selected, and there's an image, then we should
1861         // take care to leave the area under the image painted in the
1862         // background colour.
1863         dc.DrawRectangle( item->GetX() + image_w - 2, item->GetY()+offset,
1864                           item->GetWidth() - image_w + 2, total_h-offset );
1865     }
1866     else
1867     {
1868         dc.DrawRectangle( item->GetX()-2, item->GetY()+offset,
1869                           item->GetWidth()+2, total_h-offset );
1870     }
1871
1872     if ( image != NO_IMAGE )
1873     {
1874         dc.SetClippingRegion( item->GetX(), item->GetY(), image_w-2, total_h );
1875         m_imageListNormal->Draw( image, dc,
1876                                  item->GetX(),
1877                                  item->GetY() +((total_h > image_h)?((total_h-image_h)/2):0),
1878                                  wxIMAGELIST_DRAW_TRANSPARENT );
1879         dc.DestroyClippingRegion();
1880     }
1881
1882     dc.SetBackgroundMode(wxTRANSPARENT);
1883     int extraH = (total_h > text_h) ? (total_h - text_h)/2 : 0;
1884     dc.DrawText( item->GetText(),
1885                  (wxCoord)(image_w + item->GetX()),
1886                  (wxCoord)(item->GetY() + extraH));
1887
1888     // restore normal font
1889     dc.SetFont( m_normalFont );
1890 }
1891
1892 // Now y stands for the top of the item, whereas it used to stand for middle !
1893 void wxGenericTreeCtrl::PaintLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y )
1894 {
1895     int x = level*m_indent;
1896     if (!HasFlag(wxTR_HIDE_ROOT))
1897     {
1898         x += m_indent;
1899     }
1900     else if (level == 0)
1901     {
1902         wxArrayGenericTreeItems& children = item->GetChildren();
1903         size_t n, count = children.Count();
1904         for (n = 0; n < count; ++n)
1905             PaintLevel(children[n], dc, 1, y);
1906         return;
1907     }
1908
1909     item->SetX(x+m_spacing);
1910     item->SetY(y);
1911
1912     int h = GetLineHeight(item);
1913     int y_top = y;
1914     int y_mid = y_top + (h>>1);
1915     y += h;
1916
1917     int exposed_x = dc.LogicalToDeviceX(0);
1918     int exposed_y = dc.LogicalToDeviceY(y_top);
1919
1920     if (IsExposed(exposed_x, exposed_y, 10000, h))  // 10000 = very much
1921     {
1922         if (item->HasPlus() && HasButtons())  // should the item show a button?
1923         {
1924             if (!HasFlag(wxTR_NO_LINES))
1925             {
1926                 if (x > (signed)m_indent || HasFlag(wxTR_LINES_AT_ROOT))
1927                     dc.DrawLine(x - m_indent, y_mid, x - 5, y_mid);
1928                 dc.DrawLine(x + 5, y_mid, x + m_spacing, y_mid);
1929             }
1930
1931             if (m_imageListButtons != NULL)
1932             {
1933                 // draw the image button here
1934                 int image_h = 0, image_w = 0, image = wxCLOSED_BUTTON;
1935                 if (item->IsExpanded()) image = wxOPEN_BUTTON;
1936                 if (item->IsSelected())
1937                     image += wxOPEN_BUTTON_SELECTED - wxOPEN_BUTTON;
1938                 m_imageListButtons->GetSize(image, image_w, image_h);
1939                 int xx = x - (image_w>>1);
1940                 int yy = y_mid - (image_h>>1);
1941                 dc.SetClippingRegion(xx, yy, image_w, image_h);
1942                 m_imageListButtons->Draw(image, dc, xx, yy,
1943                                          wxIMAGELIST_DRAW_TRANSPARENT);
1944                 dc.DestroyClippingRegion();
1945             }
1946             else if (HasFlag(wxTR_TWIST_BUTTONS))
1947             {
1948                 // draw the twisty button here
1949                 dc.SetPen(*wxBLACK_PEN);
1950                 dc.SetBrush(*m_hilightBrush);
1951
1952                 wxPoint button[3];
1953
1954                 if (item->IsExpanded())
1955                 {
1956                     button[0].x = x-5;
1957                     button[0].y = y_mid-2;
1958                     button[1].x = x+5;
1959                     button[1].y = y_mid-2;
1960                     button[2].x = x;
1961                     button[2].y = y_mid+3;
1962                 }
1963                 else
1964                 {
1965                     button[0].y = y_mid-5;
1966                     button[0].x = x-2;
1967                     button[1].y = y_mid+5;
1968                     button[1].x = x-2;
1969                     button[2].y = y_mid;
1970                     button[2].x = x+3;
1971                 }
1972                 dc.DrawPolygon(3, button);
1973
1974                 dc.SetPen(m_dottedPen);
1975             }
1976             else // if (HasFlag(wxTR_HAS_BUTTONS))
1977             {
1978                 // draw the plus sign here
1979                 dc.SetPen(*wxGREY_PEN);
1980                 dc.SetBrush(*wxWHITE_BRUSH);
1981                 dc.DrawRectangle(x-5, y_mid-4, 11, 9);
1982                 dc.SetPen(*wxBLACK_PEN);
1983                 dc.DrawLine(x-2, y_mid, x+3, y_mid);
1984                 if (!item->IsExpanded())
1985                     dc.DrawLine(x, y_mid-2, x, y_mid+3);
1986                 dc.SetPen(m_dottedPen);
1987             }
1988         }
1989         else if (!HasFlag(wxTR_NO_LINES))  // no button; maybe a line?
1990         {
1991             // draw the horizontal line here
1992             int x_start = x;
1993             if (x > (signed)m_indent || HasFlag(wxTR_LINES_AT_ROOT))
1994                 x_start -= m_indent;
1995             dc.DrawLine(x_start, y_mid, x + m_spacing, y_mid);
1996         }
1997
1998         wxPen *pen =
1999 #ifndef __WXMAC__
2000             // don't draw rect outline if we already have the
2001             // background color under Mac
2002             (item->IsSelected()) ? wxBLACK_PEN :
2003 #endif // !__WXMAC__
2004             wxTRANSPARENT_PEN;
2005
2006         wxColour colText;
2007         if (item->IsSelected() && m_hasFocus)
2008         {
2009             colText = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_HIGHLIGHTTEXT);
2010         }
2011         else
2012         {
2013             wxTreeItemAttr *attr = item->GetAttributes();
2014             if (attr && attr->HasTextColour())
2015                 colText = attr->GetTextColour();
2016             else
2017                 colText = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOWTEXT);
2018         }
2019
2020         // prepare to draw
2021         dc.SetTextForeground(colText);
2022         dc.SetPen(*pen);
2023
2024         // draw
2025         PaintItem(item, dc);
2026
2027         if (HasFlag(wxTR_ROW_LINES))
2028         {
2029             dc.SetPen(*wxWHITE_PEN);
2030             dc.DrawLine(0, y_top, 10000, y_top);
2031             dc.DrawLine(0, y, 10000, y);
2032         }
2033
2034         // restore DC objects
2035         dc.SetBrush(*wxWHITE_BRUSH);
2036         dc.SetPen(m_dottedPen);
2037         dc.SetTextForeground(*wxBLACK);
2038     }
2039
2040     if (item->IsExpanded())
2041     {
2042         wxArrayGenericTreeItems& children = item->GetChildren();
2043         int count = children.Count();
2044         if (count > 0)
2045         {
2046             int n = 0, oldY;
2047             ++level;
2048             do {
2049                 oldY = y;
2050                 PaintLevel(children[n], dc, level, y);
2051             } while (++n < count);
2052
2053             if (!HasFlag(wxTR_NO_LINES))
2054             {
2055                 // draw line down to last child
2056                 oldY += GetLineHeight(children[n-1])/2;
2057                 if (HasButtons()) y_mid += 5;
2058                 dc.DrawLine(x, y_mid, x, oldY);
2059             }
2060         }
2061     }
2062 }
2063
2064 void wxGenericTreeCtrl::DrawDropEffect(wxGenericTreeItem *item)
2065 {
2066     if ( item )
2067     {
2068         if ( item->HasPlus() )
2069         {
2070             // it's a folder, indicate it by a border
2071             DrawBorder(item);
2072         }
2073         else
2074         {
2075             // draw a line under the drop target because the item will be
2076             // dropped there
2077             DrawLine(item, TRUE /* below */);
2078         }
2079
2080         SetCursor(wxCURSOR_BULLSEYE);
2081     }
2082     else
2083     {
2084         // can't drop here
2085         SetCursor(wxCURSOR_NO_ENTRY);
2086     }
2087 }
2088
2089 void wxGenericTreeCtrl::DrawBorder(const wxTreeItemId &item)
2090 {
2091     wxCHECK_RET( item.IsOk(), _T("invalid item in wxGenericTreeCtrl::DrawLine") );
2092
2093     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
2094
2095     wxClientDC dc(this);
2096     PrepareDC( dc );
2097     dc.SetLogicalFunction(wxINVERT);
2098     dc.SetBrush(*wxTRANSPARENT_BRUSH);
2099
2100     int w = i->GetWidth() + 2;
2101     int h = GetLineHeight(i) + 2;
2102
2103     dc.DrawRectangle( i->GetX() - 1, i->GetY() - 1, w, h);
2104 }
2105
2106 void wxGenericTreeCtrl::DrawLine(const wxTreeItemId &item, bool below)
2107 {
2108     wxCHECK_RET( item.IsOk(), _T("invalid item in wxGenericTreeCtrl::DrawLine") );
2109
2110     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
2111
2112     wxClientDC dc(this);
2113     PrepareDC( dc );
2114     dc.SetLogicalFunction(wxINVERT);
2115
2116     int x = i->GetX(),
2117         y = i->GetY();
2118     if ( below )
2119     {
2120         y += GetLineHeight(i) - 1;
2121     }
2122
2123     dc.DrawLine( x, y, x + i->GetWidth(), y);
2124 }
2125
2126 // -----------------------------------------------------------------------------
2127 // wxWindows callbacks
2128 // -----------------------------------------------------------------------------
2129
2130 void wxGenericTreeCtrl::OnPaint( wxPaintEvent &WXUNUSED(event) )
2131 {
2132     wxPaintDC dc(this);
2133     PrepareDC( dc );
2134
2135     if ( !m_anchor)
2136         return;
2137
2138     dc.SetFont( m_normalFont );
2139     dc.SetPen( m_dottedPen );
2140
2141     // this is now done dynamically
2142     //if(GetImageList() == NULL)
2143     // m_lineHeight = (int)(dc.GetCharHeight() + 4);
2144
2145     int y = 2;
2146     PaintLevel( m_anchor, dc, 0, y );
2147 }
2148
2149 void wxGenericTreeCtrl::OnSetFocus( wxFocusEvent &WXUNUSED(event) )
2150 {
2151     m_hasFocus = TRUE;
2152
2153     if (m_current)
2154         RefreshLine( m_current );
2155 }
2156
2157 void wxGenericTreeCtrl::OnKillFocus( wxFocusEvent &WXUNUSED(event) )
2158 {
2159     m_hasFocus = FALSE;
2160
2161     if (m_current)
2162         RefreshLine( m_current );
2163 }
2164
2165 void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
2166 {
2167     wxTreeEvent te( wxEVT_COMMAND_TREE_KEY_DOWN, GetId() );
2168     te.m_code = (int)event.KeyCode();
2169     te.SetEventObject( this );
2170     GetEventHandler()->ProcessEvent( te );
2171
2172     if ( (m_current == 0) || (m_key_current == 0) )
2173     {
2174         event.Skip();
2175         return;
2176     }
2177
2178     // how should the selection work for this event?
2179     bool is_multiple, extended_select, unselect_others;
2180     EventFlagsToSelType(GetWindowStyleFlag(),
2181                         event.ShiftDown(),
2182                         event.ControlDown(),
2183                         is_multiple, extended_select, unselect_others);
2184
2185     // + : Expand
2186     // - : Collaspe
2187     // * : Expand all/Collapse all
2188     // ' ' | return : activate
2189     // up    : go up (not last children!)
2190     // down  : go down
2191     // left  : go to parent
2192     // right : open if parent and go next
2193     // home  : go to root
2194     // end   : go to last item without opening parents
2195     switch (event.KeyCode())
2196     {
2197         case '+':
2198         case WXK_ADD:
2199             if (m_current->HasPlus() && !IsExpanded(m_current))
2200             {
2201                 Expand(m_current);
2202             }
2203             break;
2204
2205         case '*':
2206         case WXK_MULTIPLY:
2207             if ( !IsExpanded(m_current) )
2208             {
2209                 // expand all
2210                 ExpandAll(m_current);
2211                 break;
2212             }
2213             //else: fall through to Collapse() it
2214
2215         case '-':
2216         case WXK_SUBTRACT:
2217             if (IsExpanded(m_current))
2218             {
2219                 Collapse(m_current);
2220             }
2221             break;
2222
2223         case ' ':
2224         case WXK_RETURN:
2225             {
2226                 wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_ACTIVATED, GetId() );
2227                 event.m_item = (long) m_current;
2228                 event.m_code = 0;
2229                 event.SetEventObject( this );
2230                 GetEventHandler()->ProcessEvent( event );
2231             }
2232             break;
2233
2234             // up goes to the previous sibling or to the last
2235             // of its children if it's expanded
2236         case WXK_UP:
2237             {
2238                 wxTreeItemId prev = GetPrevSibling( m_key_current );
2239                 if (!prev)
2240                 {
2241                     prev = GetParent( m_key_current );
2242                     if ((prev == GetRootItem()) && HasFlag(wxTR_HIDE_ROOT))
2243                     {
2244                         break;  // don't go to root if it is hidden
2245                     }
2246                     if (prev)
2247                     {
2248                         long cookie = 0;
2249                         wxTreeItemId current = m_key_current;
2250                         // TODO: Huh?  If we get here, we'd better be the first child of our parent.  How else could it be?
2251                         if (current == GetFirstChild( prev, cookie ))
2252                         {
2253                             // otherwise we return to where we came from
2254                             SelectItem( prev, unselect_others, extended_select );
2255                             m_key_current= (wxGenericTreeItem*) prev.m_pItem;
2256                             EnsureVisible( prev );
2257                             break;
2258                         }
2259                     }
2260                 }
2261                 if (prev)
2262                 {
2263                     while ( IsExpanded(prev) && HasChildren(prev) )
2264                     {
2265                         wxTreeItemId child = GetLastChild(prev);
2266                         if ( child )
2267                         {
2268                             prev = child;
2269                         }
2270                     }
2271
2272                     SelectItem( prev, unselect_others, extended_select );
2273                     m_key_current=(wxGenericTreeItem*) prev.m_pItem;
2274                     EnsureVisible( prev );
2275                 }
2276             }
2277             break;
2278
2279             // left arrow goes to the parent
2280         case WXK_LEFT:
2281             {
2282                 wxTreeItemId prev = GetParent( m_current );
2283                 if ((prev == GetRootItem()) && HasFlag(wxTR_HIDE_ROOT))
2284                 {
2285                     // don't go to root if it is hidden
2286                     prev = GetPrevSibling( m_current );
2287                 }
2288                 if (prev)
2289                 {
2290                     EnsureVisible( prev );
2291                     SelectItem( prev, unselect_others, extended_select );
2292                 }
2293             }
2294             break;
2295
2296         case WXK_RIGHT:
2297             // this works the same as the down arrow except that we
2298             // also expand the item if it wasn't expanded yet
2299             Expand(m_current);
2300             // fall through
2301
2302         case WXK_DOWN:
2303             {
2304                 if (IsExpanded(m_key_current) && HasChildren(m_key_current))
2305                 {
2306                     long cookie = 0;
2307                     wxTreeItemId child = GetFirstChild( m_key_current, cookie );
2308                     SelectItem( child, unselect_others, extended_select );
2309                     m_key_current=(wxGenericTreeItem*) child.m_pItem;
2310                     EnsureVisible( child );
2311                 }
2312                 else
2313                 {
2314                     wxTreeItemId next = GetNextSibling( m_key_current );
2315                     if (!next)
2316                     {
2317                         wxTreeItemId current = m_key_current;
2318                         while (current && !next)
2319                         {
2320                             current = GetParent( current );
2321                             if (current) next = GetNextSibling( current );
2322                         }
2323                     }
2324                     if (next)
2325                     {
2326                         SelectItem( next, unselect_others, extended_select );
2327                         m_key_current=(wxGenericTreeItem*) next.m_pItem;
2328                         EnsureVisible( next );
2329                     }
2330                 }
2331             }
2332             break;
2333
2334             // <End> selects the last visible tree item
2335         case WXK_END:
2336             {
2337                 wxTreeItemId last = GetRootItem();
2338
2339                 while ( last.IsOk() && IsExpanded(last) )
2340                 {
2341                     wxTreeItemId lastChild = GetLastChild(last);
2342
2343                     // it may happen if the item was expanded but then all of
2344                     // its children have been deleted - so IsExpanded() returned
2345                     // TRUE, but GetLastChild() returned invalid item
2346                     if ( !lastChild )
2347                         break;
2348
2349                     last = lastChild;
2350                 }
2351
2352                 if ( last.IsOk() )
2353                 {
2354                     EnsureVisible( last );
2355                     SelectItem( last, unselect_others, extended_select );
2356                 }
2357             }
2358             break;
2359
2360             // <Home> selects the root item
2361         case WXK_HOME:
2362             {
2363                 wxTreeItemId prev = GetRootItem();
2364                 if (!prev) break;
2365                 if (HasFlag(wxTR_HIDE_ROOT))
2366                 {
2367                     long dummy;
2368                     prev = GetFirstChild(prev, dummy);
2369                     if (!prev) break;
2370                 }
2371                 EnsureVisible( prev );
2372                 SelectItem( prev, unselect_others, extended_select );
2373             }
2374             break;
2375
2376         default:
2377             event.Skip();
2378     }
2379 }
2380
2381 wxTreeItemId wxGenericTreeCtrl::HitTest(const wxPoint& point, int& flags)
2382 {
2383     // JACS: removed wxYieldIfNeeded() because it can cause the window
2384     // to be deleted from under us if a close window event is pending
2385
2386     int w, h;
2387     GetSize(&w, &h);
2388     flags=0;
2389     if (point.x<0) flags |= wxTREE_HITTEST_TOLEFT;
2390     if (point.x>w) flags |= wxTREE_HITTEST_TORIGHT;
2391     if (point.y<0) flags |= wxTREE_HITTEST_ABOVE;
2392     if (point.y>h) flags |= wxTREE_HITTEST_BELOW;
2393     if (flags) return wxTreeItemId();
2394
2395     if (m_anchor == NULL)
2396     {
2397         flags = wxTREE_HITTEST_NOWHERE;
2398         return wxTreeItemId();
2399     }
2400
2401     wxClientDC dc(this);
2402     PrepareDC(dc);
2403     wxCoord x = dc.DeviceToLogicalX( point.x );
2404     wxCoord y = dc.DeviceToLogicalY( point.y );
2405     wxGenericTreeItem *hit =  m_anchor->HitTest(wxPoint(x, y),
2406                                                 this,
2407                                                 flags,
2408                                                 0 );
2409     if (hit == NULL)
2410     {
2411         flags = wxTREE_HITTEST_NOWHERE;
2412         return wxTreeItemId();
2413     }
2414     return hit;
2415 }
2416
2417 // get the bounding rectangle of the item (or of its label only)
2418 bool wxGenericTreeCtrl::GetBoundingRect(const wxTreeItemId& item,
2419                          wxRect& rect,
2420                          bool WXUNUSED(textOnly)) const
2421 {
2422     wxCHECK_MSG( item.IsOk(), FALSE, _T("invalid item in wxGenericTreeCtrl::GetBoundingRect") );
2423
2424     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
2425
2426     int startX, startY;
2427     GetViewStart(& startX, & startY);
2428
2429     rect.x = i->GetX() - startX*PIXELS_PER_UNIT;
2430     rect.y = i->GetY() - startY*PIXELS_PER_UNIT;
2431     rect.width = i->GetWidth();
2432     //rect.height = i->GetHeight();
2433     rect.height = GetLineHeight(i);
2434
2435     return TRUE;
2436 }
2437
2438 /* **** */
2439
2440 void wxGenericTreeCtrl::Edit( const wxTreeItemId& item )
2441 {
2442     if (!item.IsOk()) return;
2443
2444     m_currentEdit = (wxGenericTreeItem*) item.m_pItem;
2445
2446     wxTreeEvent te( wxEVT_COMMAND_TREE_BEGIN_LABEL_EDIT, GetId() );
2447     te.m_item = (long) m_currentEdit;
2448     te.SetEventObject( this );
2449     GetEventHandler()->ProcessEvent( te );
2450
2451     if (!te.IsAllowed()) return;
2452
2453     // We have to call this here because the label in
2454     // question might just have been added and no screen
2455     // update taken place.
2456     if (m_dirty) wxYieldIfNeeded();
2457
2458     wxString s = m_currentEdit->GetText();
2459     int x = m_currentEdit->GetX();
2460     int y = m_currentEdit->GetY();
2461     int w = m_currentEdit->GetWidth();
2462     int h = m_currentEdit->GetHeight();
2463
2464     int image_h = 0;
2465     int image_w = 0;
2466
2467     int image = m_currentEdit->GetCurrentImage();
2468     if ( image != NO_IMAGE )
2469     {
2470         if ( m_imageListNormal )
2471         {
2472             m_imageListNormal->GetSize( image, image_w, image_h );
2473             image_w += 4;
2474         }
2475         else
2476         {
2477             wxFAIL_MSG(_T("you must create an image list to use images!"));
2478         }
2479     }
2480     x += image_w;
2481     w -= image_w + 4; // I don't know why +4 is needed
2482
2483     wxClientDC dc(this);
2484     PrepareDC( dc );
2485     x = dc.LogicalToDeviceX( x );
2486     y = dc.LogicalToDeviceY( y );
2487
2488     wxTreeTextCtrl *text = new wxTreeTextCtrl(this, -1,
2489                                               &m_renameAccept,
2490                                               &m_renameRes,
2491                                               this,
2492                                               s,
2493                                               wxPoint(x-4,y-4),
2494                                               wxSize(w+11,h+8));
2495     text->SetFocus();
2496 }
2497
2498 void wxGenericTreeCtrl::OnRenameTimer()
2499 {
2500     Edit( m_current );
2501 }
2502
2503 void wxGenericTreeCtrl::OnRenameAccept()
2504 {
2505     // TODO if the validator fails this causes a crash
2506     wxTreeEvent le( wxEVT_COMMAND_TREE_END_LABEL_EDIT, GetId() );
2507     le.m_item = (long) m_currentEdit;
2508     le.SetEventObject( this );
2509     le.m_label = m_renameRes;
2510     GetEventHandler()->ProcessEvent( le );
2511
2512     if (!le.IsAllowed()) return;
2513
2514     SetItemText( m_currentEdit, m_renameRes );
2515 }
2516
2517 void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
2518 {
2519     if ( !m_anchor ) return;
2520
2521     // we process left mouse up event (enables in-place edit), right down
2522     // (pass to the user code), left dbl click (activate item) and
2523     // dragging/moving events for items drag-and-drop
2524     if ( !(event.LeftDown() ||
2525            event.LeftUp() ||
2526            event.RightDown() ||
2527            event.LeftDClick() ||
2528            event.Dragging() ||
2529            ((event.Moving() || event.RightUp()) && m_isDragging)) )
2530     {
2531         event.Skip();
2532
2533         return;
2534     }
2535
2536     wxClientDC dc(this);
2537     PrepareDC(dc);
2538     wxCoord x = dc.DeviceToLogicalX( event.GetX() );
2539     wxCoord y = dc.DeviceToLogicalY( event.GetY() );
2540
2541     int flags = 0;
2542     wxGenericTreeItem *item = m_anchor->HitTest( wxPoint(x,y),
2543                                                  this,
2544                                                  flags,
2545                                                  0 );
2546
2547     if ( event.Dragging() && !m_isDragging )
2548     {
2549         if (m_dragCount == 0)
2550             m_dragStart = wxPoint(x,y);
2551
2552         m_dragCount++;
2553
2554         if (m_dragCount != 3)
2555         {
2556             // wait until user drags a bit further...
2557             return;
2558         }
2559
2560         wxEventType command = event.RightIsDown()
2561                               ? wxEVT_COMMAND_TREE_BEGIN_RDRAG
2562                               : wxEVT_COMMAND_TREE_BEGIN_DRAG;
2563
2564         wxTreeEvent nevent( command, GetId() );
2565         nevent.m_item = (long) m_current;
2566         nevent.SetEventObject(this);
2567
2568         // by default the dragging is not supported, the user code must
2569         // explicitly allow the event for it to take place
2570         nevent.Veto();
2571
2572         if ( GetEventHandler()->ProcessEvent(nevent) && nevent.IsAllowed() )
2573         {
2574             // we're going to drag this item
2575             m_isDragging = TRUE;
2576
2577             // remember the old cursor because we will change it while
2578             // dragging
2579             m_oldCursor = m_cursor;
2580
2581             // in a single selection control, hide the selection temporarily
2582             if ( !(GetWindowStyleFlag() & wxTR_MULTIPLE) )
2583             {
2584                 m_oldSelection = (wxGenericTreeItem*) GetSelection().m_pItem;
2585
2586                 if ( m_oldSelection )
2587                 {
2588                     m_oldSelection->SetHilight(FALSE);
2589                     RefreshLine(m_oldSelection);
2590                 }
2591             }
2592
2593             CaptureMouse();
2594         }
2595     }
2596     else if ( event.Moving() )
2597     {
2598         if ( item != m_dropTarget )
2599         {
2600             // unhighlight the previous drop target
2601             DrawDropEffect(m_dropTarget);
2602
2603             m_dropTarget = item;
2604
2605             // highlight the current drop target if any
2606             DrawDropEffect(m_dropTarget);
2607
2608             wxYieldIfNeeded();
2609         }
2610     }
2611     else if ( (event.LeftUp() || event.RightUp()) && m_isDragging )
2612     {
2613         // erase the highlighting
2614         DrawDropEffect(m_dropTarget);
2615
2616         if ( m_oldSelection )
2617         {
2618             m_oldSelection->SetHilight(TRUE);
2619             RefreshLine(m_oldSelection);
2620             m_oldSelection = (wxGenericTreeItem *)NULL;
2621         }
2622
2623         // generate the drag end event
2624         wxTreeEvent event(wxEVT_COMMAND_TREE_END_DRAG, GetId());
2625
2626         event.m_item = (long) item;
2627         event.m_pointDrag = wxPoint(x, y);
2628         event.SetEventObject(this);
2629
2630         (void)GetEventHandler()->ProcessEvent(event);
2631
2632         m_isDragging = FALSE;
2633         m_dropTarget = (wxGenericTreeItem *)NULL;
2634
2635         ReleaseMouse();
2636
2637         SetCursor(m_oldCursor);
2638
2639         wxYieldIfNeeded();
2640     }
2641     else
2642     {
2643         // here we process only the messages which happen on tree items
2644
2645         m_dragCount = 0;
2646
2647         if (item == NULL) return;  /* we hit the blank area */
2648
2649         if ( event.RightDown() )
2650         {
2651             wxTreeEvent nevent(wxEVT_COMMAND_TREE_ITEM_RIGHT_CLICK, GetId());
2652             nevent.m_item = (long) item;
2653             nevent.m_code = 0;
2654             CalcScrolledPosition(x, y,
2655                                  &nevent.m_pointDrag.x,
2656                                  &nevent.m_pointDrag.y);
2657             nevent.SetEventObject(this);
2658             GetEventHandler()->ProcessEvent(nevent);
2659         }
2660         else if ( event.LeftUp() )
2661         {
2662             if ( m_lastOnSame )
2663             {
2664                 if ( (item == m_current) &&
2665                      (flags & wxTREE_HITTEST_ONITEMLABEL) &&
2666                      HasFlag(wxTR_EDIT_LABELS) )
2667                 {
2668                     if ( m_renameTimer->IsRunning() )
2669                         m_renameTimer->Stop();
2670
2671                     m_renameTimer->Start( 100, TRUE );
2672                 }
2673
2674                 m_lastOnSame = FALSE;
2675             }
2676         }
2677         else // !RightDown() && !LeftUp() ==> LeftDown() || LeftDClick()
2678         {
2679             if ( event.LeftDown() )
2680             {
2681                 m_lastOnSame = item == m_current;
2682             }
2683
2684             if ( flags & wxTREE_HITTEST_ONITEMBUTTON )
2685             {
2686                 // only toggle the item for a single click, double click on
2687                 // the button doesn't do anything (it toggles the item twice)
2688                 if ( event.LeftDown() )
2689                 {
2690                     Toggle( item );
2691                 }
2692
2693                 // don't select the item if the button was clicked
2694                 return;
2695             }
2696
2697             // how should the selection work for this event?
2698             bool is_multiple, extended_select, unselect_others;
2699             EventFlagsToSelType(GetWindowStyleFlag(),
2700                                 event.ShiftDown(),
2701                                 event.ControlDown(),
2702                                 is_multiple, extended_select, unselect_others);
2703
2704             SelectItem(item, unselect_others, extended_select);
2705
2706             // For some reason, Windows isn't recognizing a left double-click,
2707             // so we need to simulate it here.  Allow 200 milliseconds for now.
2708             if ( event.LeftDClick() )
2709             {
2710                 // double clicking should not start editing the item label
2711                 m_renameTimer->Stop();
2712                 m_lastOnSame = FALSE;
2713
2714                 if (item->HasPlus())
2715                 {
2716                     // for a "directory" node, toggle expansion
2717                     Toggle(item);
2718                 }
2719                 else
2720                 {
2721                     // for a "file" node, activate it
2722                     wxTreeEvent nevent( wxEVT_COMMAND_TREE_ITEM_ACTIVATED,
2723                                         GetId() );
2724                     nevent.m_item = (long) item;
2725                     nevent.m_code = 0;
2726                     CalcScrolledPosition(x, y,
2727                                          &nevent.m_pointDrag.x,
2728                                          &nevent.m_pointDrag.y);
2729                     nevent.SetEventObject( this );
2730                     GetEventHandler()->ProcessEvent( nevent );
2731                 }
2732             }
2733         }
2734     }
2735 }
2736
2737 void wxGenericTreeCtrl::OnIdle( wxIdleEvent &WXUNUSED(event) )
2738 {
2739     /* after all changes have been done to the tree control,
2740      * we actually redraw the tree when everything is over */
2741
2742     if (!m_dirty) return;
2743
2744     m_dirty = FALSE;
2745
2746     CalculatePositions();
2747     Refresh();
2748     AdjustMyScrollbars();
2749 }
2750
2751 void wxGenericTreeCtrl::CalculateSize( wxGenericTreeItem *item, wxDC &dc )
2752 {
2753     wxCoord text_w = 0;
2754     wxCoord text_h = 0;
2755
2756     if (item->IsBold())
2757         dc.SetFont(m_boldFont);
2758
2759     dc.GetTextExtent( item->GetText(), &text_w, &text_h );
2760     text_h+=2;
2761
2762     // restore normal font
2763     dc.SetFont( m_normalFont );
2764
2765     int image_h = 0;
2766     int image_w = 0;
2767     int image = item->GetCurrentImage();
2768     if ( image != NO_IMAGE )
2769     {
2770         if ( m_imageListNormal )
2771         {
2772             m_imageListNormal->GetSize( image, image_w, image_h );
2773             image_w += 4;
2774         }
2775     }
2776
2777     int total_h = (image_h > text_h) ? image_h : text_h;
2778
2779     if (total_h < 30)
2780         total_h += 2;            // at least 2 pixels
2781     else
2782         total_h += total_h/10;   // otherwise 10% extra spacing
2783
2784     item->SetHeight(total_h);
2785     if (total_h>m_lineHeight)
2786         m_lineHeight=total_h;
2787
2788     item->SetWidth(image_w+text_w+2);
2789 }
2790
2791 // -----------------------------------------------------------------------------
2792 // for developper : y is now the top of the level
2793 // not the middle of it !
2794 void wxGenericTreeCtrl::CalculateLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y )
2795 {
2796     int x = level*m_indent;
2797     if (!HasFlag(wxTR_HIDE_ROOT))
2798     {
2799         x += m_indent;
2800     }
2801     else if (level == 0)
2802     {
2803         // a hidden root is not evaluated, but its
2804         // children are always calculated
2805         goto Recurse;
2806     }
2807
2808     CalculateSize( item, dc );
2809
2810     // set its position
2811     item->SetX( x+m_spacing );
2812     item->SetY( y );
2813     y += GetLineHeight(item);
2814
2815     if ( !item->IsExpanded() )
2816     {
2817         // we don't need to calculate collapsed branches
2818         return;
2819     }
2820
2821   Recurse:
2822     wxArrayGenericTreeItems& children = item->GetChildren();
2823     size_t n, count = children.Count();
2824     ++level;
2825     for (n = 0; n < count; ++n )
2826         CalculateLevel( children[n], dc, level, y );  // recurse
2827 }
2828
2829 void wxGenericTreeCtrl::CalculatePositions()
2830 {
2831     if ( !m_anchor ) return;
2832
2833     wxClientDC dc(this);
2834     PrepareDC( dc );
2835
2836     dc.SetFont( m_normalFont );
2837
2838     dc.SetPen( m_dottedPen );
2839     //if(GetImageList() == NULL)
2840     // m_lineHeight = (int)(dc.GetCharHeight() + 4);
2841
2842     int y = 2;
2843     CalculateLevel( m_anchor, dc, 0, y ); // start recursion
2844 }
2845
2846 void wxGenericTreeCtrl::RefreshSubtree(wxGenericTreeItem *item)
2847 {
2848     if (m_dirty) return;
2849
2850     wxClientDC dc(this);
2851     PrepareDC(dc);
2852
2853     int cw = 0;
2854     int ch = 0;
2855     GetClientSize( &cw, &ch );
2856
2857     wxRect rect;
2858     rect.x = dc.LogicalToDeviceX( 0 );
2859     rect.width = cw;
2860     rect.y = dc.LogicalToDeviceY( item->GetY() );
2861     rect.height = ch;
2862
2863     Refresh( TRUE, &rect );
2864
2865     AdjustMyScrollbars();
2866 }
2867
2868 void wxGenericTreeCtrl::RefreshLine( wxGenericTreeItem *item )
2869 {
2870     if (m_dirty) return;
2871
2872     wxClientDC dc(this);
2873     PrepareDC( dc );
2874
2875     int cw = 0;
2876     int ch = 0;
2877     GetClientSize( &cw, &ch );
2878
2879     wxRect rect;
2880     rect.x = dc.LogicalToDeviceX( 0 );
2881     rect.y = dc.LogicalToDeviceY( item->GetY() );
2882     rect.width = cw;
2883     rect.height = GetLineHeight(item); //dc.GetCharHeight() + 6;
2884
2885     Refresh( TRUE, &rect );
2886 }
2887
2888 #endif // wxUSE_TREECTRL