src/gtk/frame.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        frame.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11 #pragma implementation "frame.h"
  12 #endif
  13
  14 #include "wx/frame.h"
  15 #include "wx/dialog.h"
  16 #include "wx/control.h"
  17 #include "wx/app.h"
  18 #include "wx/menu.h"
  19 #include "wx/toolbar.h"
  20 #include "wx/statusbr.h"
  21 #include "wx/dcclient.h"
  22
  23 #include "glib.h"
  24 #include "gdk/gdk.h"
  25 #include "gtk/gtk.h"
  26 #include "wx/gtk/win_gtk.h"
  27
  28 //-----------------------------------------------------------------------------
  29 // constants
  30 //-----------------------------------------------------------------------------
  31
  32 const int wxMENU_HEIGHT    = 27;
  33 const int wxSTATUS_HEIGHT  = 25;
  34
  35 //-----------------------------------------------------------------------------
  36 // data
  37 //-----------------------------------------------------------------------------
  38
  39 extern wxList wxTopLevelWindows;
  40 extern wxList wxPendingDelete;
  41
  42 //-----------------------------------------------------------------------------
  43 // "size_allocate"
  44 //-----------------------------------------------------------------------------
  45
  46 static void gtk_frame_size_callback( GtkWidget *WXUNUSED(widget), GtkAllocation* alloc, wxFrame *win )
  47 {
  48     if (!win->HasVMT()) return;
  49
  50 /*
  51     printf( "OnFrameResize from " );
  52     if (win->GetClassInfo() && win->GetClassInfo()->GetClassName())
  53         printf( win->GetClassInfo()->GetClassName() );
  54     printf( ".\n" );
  55 */
  56
  57    if ((win->m_width != alloc->width) || (win->m_height != alloc->height))
  58    {
  59        win->m_sizeSet = FALSE;
  60        win->m_width = alloc->width;
  61        win->m_height = alloc->height;
  62    }
  63 }
  64
  65 //-----------------------------------------------------------------------------
  66 // "delete_event"
  67 //-----------------------------------------------------------------------------
  68
  69 static gint gtk_frame_delete_callback( GtkWidget *WXUNUSED(widget), GdkEvent *WXUNUSED(event), wxFrame *win )
  70 {
  71 /*
  72     printf( "OnDelete from " );
  73     if (win->GetClassInfo() && win->GetClassInfo()->GetClassName())
  74         printf( win->GetClassInfo()->GetClassName() );
  75     printf( ".\n" );
  76 */
  77
  78     win->Close();
  79
  80     return TRUE;
  81 }
  82
  83 //-----------------------------------------------------------------------------
  84 // "configure_event"
  85 //-----------------------------------------------------------------------------
  86
  87 static gint gtk_frame_configure_callback( GtkWidget *WXUNUSED(widget), GdkEventConfigure *event, wxFrame *win )
  88 {
  89     if (!win->HasVMT()) return FALSE;
  90
  91     win->m_x = event->x;
  92     win->m_y = event->y;
  93
  94     wxMoveEvent mevent( wxPoint(win->m_x,win->m_y), win->GetId() );
  95     mevent.SetEventObject( win );
  96     win->GetEventHandler()->ProcessEvent( mevent );
  97
  98     return FALSE;
  99 }
 100
 101 //-----------------------------------------------------------------------------
 102 // wxFrame
 103 //-----------------------------------------------------------------------------
 104
 105 BEGIN_EVENT_TABLE(wxFrame, wxWindow)
 106     EVT_SIZE(wxFrame::OnSize)
 107     EVT_CLOSE(wxFrame::OnCloseWindow)
 108 END_EVENT_TABLE()
 109
 110 IMPLEMENT_DYNAMIC_CLASS(wxFrame,wxWindow)
 111
 112 wxFrame::wxFrame()
 113 {
 114     m_frameMenuBar = (wxMenuBar *) NULL;
 115     m_frameStatusBar = (wxStatusBar *) NULL;
 116     m_frameToolBar = (wxToolBar *) NULL;
 117     m_sizeSet = FALSE;
 118     m_miniEdge = 0;
 119     m_miniTitle = 0;
 120 }
 121
 122 wxFrame::wxFrame( wxWindow *parent, wxWindowID id, const wxString &title,
 123       const wxPoint &pos, const wxSize &size,
 124       long style, const wxString &name )
 125 {
 126     m_frameMenuBar = (wxMenuBar *) NULL;
 127     m_frameStatusBar = (wxStatusBar *) NULL;
 128     m_frameToolBar = (wxToolBar *) NULL;
 129     m_sizeSet = FALSE;
 130     m_miniEdge = 0;
 131     m_miniTitle = 0;
 132     Create( parent, id, title, pos, size, style, name );
 133 }
 134
 135 bool wxFrame::Create( wxWindow *parent, wxWindowID id, const wxString &title,
 136       const wxPoint &pos, const wxSize &size,
 137       long style, const wxString &name )
 138 {
 139     wxTopLevelWindows.Append( this );
 140
 141     m_needParent = FALSE;
 142
 143     PreCreation( parent, id, pos, size, style, name );
 144
 145     m_title = title;
 146
 147     GtkWindowType win_type = GTK_WINDOW_TOPLEVEL;
 148     if (style & wxSIMPLE_BORDER) win_type = GTK_WINDOW_POPUP;
 149
 150     m_widget = gtk_window_new( win_type );
 151
 152 #ifdef __WXDEBUG__
 153         debug_focus_in( m_widget, "wxFrame::m_widget", name );
 154 #endif
 155
 156     if ((size.x != -1) && (size.y != -1))
 157         gtk_widget_set_usize( m_widget, m_width, m_height );
 158     if ((pos.x != -1) && (pos.y != -1))
 159         gtk_widget_set_uposition( m_widget, m_x, m_y );
 160
 161     gtk_window_set_title( GTK_WINDOW(m_widget), title );
 162     GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 163
 164     gtk_widget_set( m_widget, "GtkWindow::allow_shrink", TRUE, NULL );
 165
 166     gtk_signal_connect( GTK_OBJECT(m_widget), "delete_event",
 167         GTK_SIGNAL_FUNC(gtk_frame_delete_callback), (gpointer)this );
 168
 169     m_wxwindow = gtk_myfixed_new();
 170     gtk_widget_show( m_wxwindow );
 171     GTK_WIDGET_UNSET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
 172
 173 #ifdef __WXDEBUG__
 174         debug_focus_in( m_wxwindow, "wxFrame::m_wxwindow", name );
 175 #endif
 176
 177     gtk_container_add( GTK_CONTAINER(m_widget), m_wxwindow );
 178
 179     gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate",
 180         GTK_SIGNAL_FUNC(gtk_frame_size_callback), (gpointer)this );
 181
 182     gtk_signal_connect( GTK_OBJECT(m_widget), "configure_event",
 183         GTK_SIGNAL_FUNC(gtk_frame_configure_callback), (gpointer)this );
 184
 185     if (m_parent) m_parent->AddChild( this );
 186
 187     PostCreation();
 188
 189     return TRUE;
 190 }
 191
 192 wxFrame::~wxFrame()
 193 {
 194     if (m_frameMenuBar) delete m_frameMenuBar;
 195     if (m_frameStatusBar) delete m_frameStatusBar;
 196     if (m_frameToolBar) delete m_frameToolBar;
 197
 198     wxTopLevelWindows.DeleteObject( this );
 199
 200     if (wxTheApp->GetTopWindow() == this)
 201     {
 202         wxTheApp->SetTopWindow( (wxWindow*) NULL );
 203     }
 204
 205     if (wxTopLevelWindows.Number() == 0)
 206     {
 207         wxTheApp->ExitMainLoop();
 208     }
 209 }
 210
 211 bool wxFrame::Show( bool show )
 212 {
 213     wxASSERT_MSG( (m_widget != NULL), "invalid frame" );
 214
 215     if (show && !m_sizeSet)
 216     {
 217   // by calling GtkOnSize here, we don't have to call
 218   // either after showing the frame, which would entail
 219   // much ugly flicker nor from within the size_allocate
 220   // handler, because GTK 1.1.X forbids that.
 221
 222         GtkOnSize( m_x, m_y, m_width, m_height );
 223     }
 224
 225     return wxWindow::Show( show );
 226 }
 227
 228 void wxFrame::OnCloseWindow( wxCloseEvent &event )
 229 {
 230     if (GetEventHandler()->OnClose() || event.GetForce()) this->Destroy();
 231 }
 232
 233 bool wxFrame::Destroy()
 234 {
 235     wxASSERT_MSG( (m_widget != NULL), "invalid frame" );
 236
 237     if (!wxPendingDelete.Member(this)) wxPendingDelete.Append(this);
 238
 239     return TRUE;
 240 }
 241
 242 wxPoint wxFrame::GetClientAreaOrigin() const
 243 {
 244     wxPoint pt( m_miniEdge, m_miniEdge + m_miniTitle );
 245     if (m_frameMenuBar)
 246     {
 247         int h = 0;
 248         m_frameMenuBar->GetSize( (int*)NULL, &h );
 249         pt.y += h;
 250     }
 251     if (m_frameToolBar)
 252     {
 253         int h = 0;
 254         m_frameToolBar->GetSize( (int*)NULL, &h );
 255         pt.y += h;
 256     }
 257     return pt;
 258 }
 259
 260 void wxFrame::SetSize( int x, int y, int width, int height, int sizeFlags )
 261 {
 262     wxASSERT_MSG( (m_widget != NULL), "invalid window" );
 263
 264     // Don't do anything for children of wxMDIChildFrame
 265     if (!m_wxwindow) return;
 266
 267     if (m_resizing) return; // I don't like recursions
 268     m_resizing = TRUE;
 269
 270     int old_x = m_x;
 271     int old_y = m_y;
 272     int old_width = m_width;
 273     int old_height = m_height;
 274
 275     if ((sizeFlags & wxSIZE_USE_EXISTING) == wxSIZE_USE_EXISTING)
 276     {
 277         if (x != -1) m_x = x;
 278         if (y != -1) m_y = y;
 279         if (width != -1) m_width = width;
 280         if (height != -1) m_height = height;
 281     }
 282     else
 283     {
 284         m_x = x;
 285         m_y = y;
 286         m_width = width;
 287         m_height = height;
 288     }
 289
 290     if ((sizeFlags & wxSIZE_AUTO_WIDTH) == wxSIZE_AUTO_WIDTH)
 291     {
 292         if (width == -1) m_width = 80;
 293     }
 294
 295     if ((sizeFlags & wxSIZE_AUTO_HEIGHT) == wxSIZE_AUTO_HEIGHT)
 296     {
 297        if (height == -1) m_height = 26;
 298     }
 299
 300     if ((m_minWidth != -1) && (m_width < m_minWidth)) m_width = m_minWidth;
 301     if ((m_minHeight != -1) && (m_height < m_minHeight)) m_height = m_minHeight;
 302     if ((m_maxWidth != -1) && (m_width > m_maxWidth)) m_width = m_maxWidth;
 303     if ((m_maxHeight != -1) && (m_height > m_maxHeight)) m_height = m_maxHeight;
 304
 305     if ((m_x != -1) || (m_y != -1))
 306     {
 307         if ((m_x != old_x) || (m_y != old_y))
 308             gtk_widget_set_uposition( m_widget, m_x, m_y );
 309     }
 310
 311     if ((m_width != old_width) || (m_height != old_height))
 312     {
 313        gtk_widget_set_usize( m_widget, m_width, m_height );
 314     }
 315
 316     wxSizeEvent event( wxSize(m_width,m_height), GetId() );
 317     event.SetEventObject( this );
 318     GetEventHandler()->ProcessEvent( event );
 319
 320     m_resizing = FALSE;
 321 }
 322
 323 void wxFrame::SetSize( int width, int height )
 324 {
 325     SetSize( -1, -1, width, height, wxSIZE_USE_EXISTING );
 326 }
 327
 328 void wxFrame::Centre( int direction )
 329 {
 330     wxASSERT_MSG( (m_widget != NULL), "invalid frame" );
 331
 332     int x = 0;
 333     int y = 0;
 334
 335     if (direction & wxHORIZONTAL == wxHORIZONTAL) x = (gdk_screen_width () - m_width) / 2;
 336     if (direction & wxVERTICAL == wxVERTICAL) y = (gdk_screen_height () - m_height) / 2;
 337
 338     Move( x, y );
 339 }
 340
 341 void wxFrame::GetClientSize( int *width, int *height ) const
 342 {
 343     wxASSERT_MSG( (m_widget != NULL), "invalid frame" );
 344
 345     wxWindow::GetClientSize( width, height );
 346     if (height)
 347     {
 348         if (m_frameMenuBar) (*height) -= wxMENU_HEIGHT;
 349         if (m_frameStatusBar) (*height) -= wxSTATUS_HEIGHT;
 350         if (m_frameToolBar)
 351         {
 352             int y = 0;
 353             m_frameToolBar->GetSize( (int *) NULL, &y );
 354             (*height) -= y;
 355         }
 356         (*height) -= m_miniEdge*2 + m_miniTitle;
 357     }
 358     if (width)
 359     {
 360         (*width) -= m_miniEdge*2;
 361     }
 362 }
 363
 364 void wxFrame::SetClientSize( int const width, int const height )
 365 {
 366     wxASSERT_MSG( (m_widget != NULL), "invalid frame" );
 367
 368     int h = height;
 369     if (m_frameMenuBar) h += wxMENU_HEIGHT;
 370     if (m_frameStatusBar) h += wxSTATUS_HEIGHT;
 371     if (m_frameToolBar)
 372     {
 373         int y = 0;
 374         m_frameToolBar->GetSize( (int *) NULL, &y );
 375         h += y;
 376     }
 377     wxWindow::SetClientSize( width + m_miniEdge*2, h  + m_miniEdge*2 + m_miniTitle );
 378 }
 379
 380 void wxFrame::GtkOnSize( int WXUNUSED(x), int WXUNUSED(y), int width, int height )
 381 {
 382     // due to a bug in gtk, x,y are always 0
 383     // m_x = x;
 384     // m_y = y;
 385
 386     if (m_resizing) return;
 387     m_resizing = TRUE;
 388
 389     if (!m_wxwindow) return;
 390
 391     m_width = width;
 392     m_height = height;
 393
 394     if ((m_minWidth != -1) && (m_width < m_minWidth)) m_width = m_minWidth;
 395     if ((m_minHeight != -1) && (m_height < m_minHeight)) m_height = m_minHeight;
 396     if ((m_maxWidth != -1) && (m_width > m_maxWidth)) m_width = m_maxWidth;
 397     if ((m_maxHeight != -1) && (m_height > m_maxHeight)) m_height = m_maxHeight;
 398
 399     gtk_widget_set_usize( m_widget, m_width, m_height );
 400
 401     // this emulates the new wxMSW behaviour of placing all
 402     // frame-subwindows (menu, toolbar..) on one native window
 403         // OK, this hurts in the eye, but I don't want to call SetSize()
 404         // because I don't want to call any non-native functions here.
 405
 406     if (m_frameMenuBar)
 407     {
 408         int xx = m_miniEdge;
 409         int yy = m_miniEdge + m_miniTitle;
 410         int ww = m_width  - 2*m_miniEdge;
 411         int hh = wxMENU_HEIGHT;
 412         m_frameMenuBar->m_x = xx;
 413         m_frameMenuBar->m_y = yy;
 414         m_frameMenuBar->m_width = ww;
 415         m_frameMenuBar->m_height = hh;
 416
 417         gtk_myfixed_move( GTK_MYFIXED(m_wxwindow), m_frameMenuBar->m_widget, xx, yy );
 418         gtk_widget_set_usize( m_frameMenuBar->m_widget, ww, hh );
 419     }
 420
 421     if (m_frameToolBar)
 422     {
 423         int xx = m_miniEdge;
 424         int yy = m_miniEdge + m_miniTitle;
 425         if (m_frameMenuBar) yy += wxMENU_HEIGHT;
 426         int ww = m_width - 2*m_miniEdge;
 427         int hh = m_frameToolBar->m_height;
 428
 429         m_frameToolBar->m_x = xx;
 430         m_frameToolBar->m_y = yy;
 431         m_frameToolBar->m_height = hh;
 432         m_frameToolBar->m_width = ww;
 433
 434         gtk_myfixed_move( GTK_MYFIXED(m_wxwindow), m_frameToolBar->m_widget, xx, yy );
 435         gtk_widget_set_usize( m_frameToolBar->m_widget, ww, hh );
 436     }
 437
 438     if (m_frameStatusBar)
 439     {
 440         int xx = 0 + m_miniEdge;
 441         int yy = m_height - wxSTATUS_HEIGHT - m_miniEdge;
 442         int ww = m_width - 2*m_miniEdge;
 443         int hh = wxSTATUS_HEIGHT;
 444
 445         m_frameStatusBar->m_x = xx;
 446         m_frameStatusBar->m_y = yy;
 447         m_frameStatusBar->m_width = ww;
 448         m_frameStatusBar->m_height = hh;
 449
 450         gtk_myfixed_move( GTK_MYFIXED(m_wxwindow), m_frameStatusBar->m_widget, xx, yy );
 451         gtk_widget_set_usize( m_frameStatusBar->m_widget, ww, hh );
 452     }
 453
 454     m_sizeSet = TRUE;
 455
 456     /* send size event to frame */
 457
 458     wxSizeEvent event( wxSize(m_width,m_height), GetId() );
 459     event.SetEventObject( this );
 460     GetEventHandler()->ProcessEvent( event );
 461
 462     /* send size event to status bar */
 463
 464     wxSizeEvent event2( wxSize(m_frameStatusBar->m_width,m_frameStatusBar->m_height), m_frameStatusBar->GetId() );
 465     event2.SetEventObject( m_frameStatusBar );
 466     m_frameStatusBar->GetEventHandler()->ProcessEvent( event2 );
 467
 468     m_resizing = FALSE;
 469 }
 470
 471 void wxFrame::OnInternalIdle()
 472 {
 473     if (!m_sizeSet)
 474         GtkOnSize( m_x, m_y, m_width, m_height );
 475
 476     DoMenuUpdates();
 477 }
 478
 479 void wxFrame::OnSize( wxSizeEvent &WXUNUSED(event) )
 480 {
 481     wxASSERT_MSG( (m_widget != NULL), "invalid frame" );
 482
 483     if (GetAutoLayout())
 484     {
 485         Layout();
 486     }
 487     else
 488     {
 489         // no child: go out !
 490         if (!GetChildren().First()) return;
 491
 492         // do we have exactly one child?
 493         wxWindow *child = (wxWindow *) NULL;
 494         for(wxNode *node = GetChildren().First(); node; node = node->Next())
 495         {
 496             wxWindow *win = (wxWindow *)node->Data();
 497             if (!wxIS_KIND_OF(win,wxFrame) && !wxIS_KIND_OF(win,wxDialog)
 498 #if 0  // not in m_children anyway ?
 499               && (win != m_frameMenuBar) &&
 500               (win != m_frameToolBar) &&
 501               (win != m_frameStatusBar)
 502 #endif
 503             )
 504             {
 505           // it's the second one: do nothing
 506                 if (child) return;
 507                 child = win;
 508             }
 509         }
 510
 511         // yes: set it's size to fill all the frame
 512         int client_x, client_y;
 513         GetClientSize( &client_x, &client_y );
 514         child->SetSize( 1, 1, client_x-2, client_y-2 );
 515     }
 516 }
 517
 518 static void SetInvokingWindow( wxMenu *menu, wxWindow *win )
 519 {
 520     menu->SetInvokingWindow( win );
 521     wxNode *node = menu->m_items.First();
 522     while (node)
 523     {
 524         wxMenuItem *menuitem = (wxMenuItem*)node->Data();
 525         if (menuitem->IsSubMenu())
 526             SetInvokingWindow( menuitem->GetSubMenu(), win );
 527         node = node->Next();
 528     }
 529 }
 530
 531 void wxFrame::SetMenuBar( wxMenuBar *menuBar )
 532 {
 533     wxASSERT_MSG( (m_widget != NULL), "invalid frame" );
 534     wxASSERT_MSG( (m_wxwindow != NULL), "invalid frame" );
 535
 536     m_frameMenuBar = menuBar;
 537
 538     if (m_frameMenuBar)
 539     {
 540         wxNode *node = m_frameMenuBar->m_menus.First();
 541         while (node)
 542         {
 543             wxMenu *menu = (wxMenu*)node->Data();
 544             SetInvokingWindow( menu, this );
 545             node = node->Next();
 546         }
 547
 548         if (m_frameMenuBar->m_parent != this)
 549         {
 550             m_frameMenuBar->m_parent = this;
 551             gtk_myfixed_put( GTK_MYFIXED(m_wxwindow),
 552                 m_frameMenuBar->m_widget, m_frameMenuBar->m_x, m_frameMenuBar->m_y );
 553         }
 554     }
 555
 556     m_sizeSet = FALSE;
 557 }
 558
 559 wxMenuBar *wxFrame::GetMenuBar() const
 560 {
 561     return m_frameMenuBar;
 562 }
 563
 564 wxToolBar* wxFrame::CreateToolBar(long style, wxWindowID id, const wxString& name)
 565 {
 566     wxASSERT_MSG( (m_widget != NULL), "invalid frame" );
 567
 568     wxCHECK_MSG( m_frameToolBar == NULL, FALSE, "recreating toolbar in wxFrame" );
 569
 570     m_frameToolBar = OnCreateToolBar( style, id, name );
 571
 572     GetChildren().DeleteObject( m_frameToolBar );
 573
 574     m_sizeSet = FALSE;
 575
 576     return m_frameToolBar;
 577 }
 578
 579 wxToolBar* wxFrame::OnCreateToolBar( long style, wxWindowID id, const wxString& name )
 580 {
 581     return new wxToolBar( this, id, wxDefaultPosition, wxDefaultSize, style, name );
 582 }
 583
 584 wxToolBar *wxFrame::GetToolBar() const
 585 {
 586     return m_frameToolBar;
 587 }
 588
 589 wxStatusBar* wxFrame::CreateStatusBar( int number, long style, wxWindowID id, const wxString& name )
 590 {
 591     wxASSERT_MSG( (m_widget != NULL), "invalid frame" );
 592
 593     wxCHECK_MSG( m_frameStatusBar == NULL, FALSE, "recreating status bar in wxFrame" );
 594
 595     m_frameStatusBar = OnCreateStatusBar( number, style, id, name );
 596
 597     m_sizeSet = FALSE;
 598
 599     return m_frameStatusBar;
 600 }
 601
 602 wxStatusBar *wxFrame::OnCreateStatusBar( int number, long style, wxWindowID id, const wxString& name )
 603 {
 604     wxStatusBar *statusBar = (wxStatusBar *) NULL;
 605
 606     statusBar = new wxStatusBar(this, id, wxPoint(0, 0), wxSize(100, 20), style, name);
 607
 608     // Set the height according to the font and the border size
 609     wxClientDC dc(statusBar);
 610     dc.SetFont( statusBar->GetFont() );
 611
 612     long x, y;
 613     dc.GetTextExtent( "X", &x, &y );
 614
 615     int height = (int)( (y  * 1.1) + 2* statusBar->GetBorderY());
 616
 617     statusBar->SetSize( -1, -1, 100, height );
 618
 619     statusBar->SetFieldsCount( number );
 620     return statusBar;
 621 }
 622
 623 void wxFrame::SetStatusText(const wxString& text, int number)
 624 {
 625     wxASSERT_MSG( (m_widget != NULL), "invalid frame" );
 626
 627     wxCHECK_RET( m_frameStatusBar != NULL, "no statusbar to set text for" );
 628
 629     m_frameStatusBar->SetStatusText(text, number);
 630 }
 631
 632 void wxFrame::SetStatusWidths(int n, const int widths_field[] )
 633 {
 634     wxASSERT_MSG( (m_widget != NULL), "invalid frame" );
 635
 636     wxCHECK_RET( m_frameStatusBar != NULL, "no statusbar to set widths for" );
 637
 638     m_frameStatusBar->SetStatusWidths(n, widths_field);
 639 }
 640
 641 wxStatusBar *wxFrame::GetStatusBar() const
 642 {
 643     return m_frameStatusBar;
 644 }
 645
 646 void wxFrame::SetTitle( const wxString &title )
 647 {
 648     wxASSERT_MSG( (m_widget != NULL), "invalid frame" );
 649
 650     m_title = title;
 651     if (m_title.IsNull()) m_title = "";
 652     gtk_window_set_title( GTK_WINDOW(m_widget), title );
 653 }
 654
 655 void wxFrame::SetIcon( const wxIcon &icon )
 656 {
 657     wxASSERT_MSG( (m_widget != NULL), "invalid frame" );
 658
 659     m_icon = icon;
 660     if (!icon.Ok()) return;
 661
 662     wxMask *mask = icon.GetMask();
 663     GdkBitmap *bm = (GdkBitmap *) NULL;
 664     if (mask) bm = mask->GetBitmap();
 665
 666     gdk_window_set_icon( m_widget->window, (GdkWindow *) NULL, icon.GetPixmap(), bm );
 667 }
 668