]> git.saurik.com Git - wxWidgets.git/blobdiff - src/gtk1/window.cpp
work around a bug in TabCtrl_AdjustRect which will cause a crash on
[wxWidgets.git] / src / gtk1 / window.cpp
index 8946429c7340baa1548d5b386105253e48aba444..33085d03c9ce37be6350752ae98166d76920fbc5 100644 (file)
@@ -4,7 +4,7 @@
 // Author:      Robert Roebling
 // Id:          $Id$
 // Copyright:   (c) 1998 Robert Roebling, Julian Smart
-// Licence:     wxWidgets licence
+// Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 
@@ -145,7 +145,7 @@ extern GtkContainerClass *pizza_parent_class;
    thw wxWindow class has a member variable called m_widget which holds a
    pointer to this widget. When the window class represents a GTK native widget,
    this is (in most cases) the only GTK widget the class manages. E.g. the
-   wxStatitText class handles only a GtkLabel widget a pointer to which you
+   wxStaticText class handles only a GtkLabel widget a pointer to which you
    can find in m_widget (defined in wxWindow)
 
    When the class has a client area for drawing into and for containing children
@@ -267,10 +267,6 @@ extern bool g_mainThreadLocked;
 // debug
 //-----------------------------------------------------------------------------
 
-#ifndef __WXGTK20__
-#define DISABLE_STYLE_IF_BROKEN_THEME 0
-#endif
-
 #ifdef __WXDEBUG__
 
 #if wxUSE_THREADS
@@ -1198,9 +1194,12 @@ static gint gtk_window_key_press_callback( GtkWidget *widget,
 // VZ: testing for wxTE_PROCESS_TAB shouldn't be done here the control may
 //     have this style, yet choose not to process this particular TAB in which
 //     case TAB must still work as a navigational character
-#if 0
-         !win->HasFlag(wxTE_PROCESS_TAB) &&
-#endif // 0
+// JS: enabling again to make consistent with other platforms
+//     (with wxTE_PROCESS_TAB you have to call Navigate to get default
+//     navigation behaviour)
+#if wxUSE_TEXTCTRL
+         (! (win->HasFlag(wxTE_PROCESS_TAB) && win->IsKindOf(CLASSINFO(wxTextCtrl)) )) &&
+#endif
          win->GetParent() && (win->GetParent()->HasFlag( wxTAB_TRAVERSAL)) )
     {
         wxNavigationKeyEvent new_event;
@@ -1347,39 +1346,36 @@ static gint gtk_window_key_release_callback( GtkWidget *widget,
 // mouse event processing helpers
 // ----------------------------------------------------------------------------
 
-// init wxMouseEvent with the info from gdk_event
-//
-// NB: this has to be a macro as gdk_event type is different for different
-//     events we're used with
-#define InitMouseEvent(/* wxWindowGTK * */ win,                               \
-                       /* wxMouseEvent& */ event,                             \
-                       /* GdkEventXXX * */ gdk_event)                         \
-{                                                                             \
-    event.SetTimestamp( gdk_event->time );                                    \
-    event.m_shiftDown = (gdk_event->state & GDK_SHIFT_MASK);                  \
-    event.m_controlDown = (gdk_event->state & GDK_CONTROL_MASK);              \
-    event.m_altDown = (gdk_event->state & GDK_MOD1_MASK);                     \
-    event.m_metaDown = (gdk_event->state & GDK_MOD2_MASK);                    \
-    event.m_leftDown = (gdk_event->state & GDK_BUTTON1_MASK);                 \
-    event.m_middleDown = (gdk_event->state & GDK_BUTTON2_MASK);               \
-    event.m_rightDown = (gdk_event->state & GDK_BUTTON3_MASK);                \
-    if (event.GetEventType()==wxEVT_MOUSEWHEEL)                               \
-    {                                                                         \
-       event.m_linesPerAction = 3;                                            \
-       if (((GdkEventButton*)gdk_event)->button == 4)                         \
-           event.m_wheelRotation = 120;                                       \
-       else if (((GdkEventButton*)gdk_event)->button == 5)                    \
-           event.m_wheelRotation = -120;                                      \
-    }                                                                         \
-                                                                              \
-    wxPoint pt = win->GetClientAreaOrigin();                                  \
-    event.m_x = (wxCoord)gdk_event->x - pt.x;                                 \
-    event.m_y = (wxCoord)gdk_event->y - pt.y;                                 \
-                                                                              \
-    event.SetEventObject( win );                                              \
-    event.SetId( win->GetId() );                                              \
-    event.SetTimestamp( gdk_event->time );                                    \
-}                                                                             \
+// init wxMouseEvent with the info from GdkEventXXX struct
+template<typename T> void InitMouseEvent(wxWindowGTK *win,
+                                         wxMouseEvent& event,
+                                         T *gdk_event)
+{
+    event.SetTimestamp( gdk_event->time );
+    event.m_shiftDown = (gdk_event->state & GDK_SHIFT_MASK);
+    event.m_controlDown = (gdk_event->state & GDK_CONTROL_MASK);
+    event.m_altDown = (gdk_event->state & GDK_MOD1_MASK);
+    event.m_metaDown = (gdk_event->state & GDK_MOD2_MASK);
+    event.m_leftDown = (gdk_event->state & GDK_BUTTON1_MASK);
+    event.m_middleDown = (gdk_event->state & GDK_BUTTON2_MASK);
+    event.m_rightDown = (gdk_event->state & GDK_BUTTON3_MASK);
+    if (event.GetEventType() == wxEVT_MOUSEWHEEL)
+    {
+       event.m_linesPerAction = 3;
+       if (((GdkEventButton*)gdk_event)->button == 4)
+           event.m_wheelRotation = 120;
+       else if (((GdkEventButton*)gdk_event)->button == 5)
+           event.m_wheelRotation = -120;
+    }
+
+    wxPoint pt = win->GetClientAreaOrigin();
+    event.m_x = (wxCoord)gdk_event->x - pt.x;
+    event.m_y = (wxCoord)gdk_event->y - pt.y;
+
+    event.SetEventObject( win );
+    event.SetId( win->GetId() );
+    event.SetTimestamp( gdk_event->time );
+}
 
 static void AdjustEventButtonState(wxMouseEvent& event)
 {
@@ -1538,8 +1534,8 @@ static gint gtk_window_button_press_callback( GtkWidget *widget,
 
     wxEventType event_type = wxEVT_NULL;
 
-    // GdkDisplay is a GTK+ 2.1.0 thing
-#if defined(__WXGTK20__) && GTK_CHECK_VERSION(2, 1, 0)
+    // GdkDisplay is a GTK+ 2.2.0 thing
+#if defined(__WXGTK20__) && GTK_CHECK_VERSION(2, 2, 0)
     if ( gdk_event->type == GDK_2BUTTON_PRESS &&
             gdk_event->button >= 1 && gdk_event->button <= 3 )
     {
@@ -2311,12 +2307,6 @@ gtk_window_realized_callback( GtkWidget *m_widget, wxWindow *win )
     if (g_isIdle)
         wxapp_install_idle_handler();
         
-    if (win->m_delayedBackgroundColour && !win->GetThemeEnabled())
-        win->GtkSetBackgroundColour( win->GetBackgroundColour() );
-
-    if (win->m_delayedForegroundColour && !win->GetThemeEnabled())
-        win->GtkSetForegroundColour( win->GetForegroundColour() );
-
 #ifdef __WXGTK20__
     if (win->m_imContext)
     {
@@ -2569,7 +2559,6 @@ void wxWindowGTK::Init()
     m_oldClientHeight = 0;
 
     m_resizing = FALSE;
-    m_widgetStyle = (GtkStyle*) NULL;
 
     m_insertCallback = (wxInsertChildFunction) NULL;
 
@@ -2580,9 +2569,6 @@ void wxWindowGTK::Init()
 
     m_cursor = *wxSTANDARD_CURSOR;
 
-    m_delayedForegroundColour = FALSE;
-    m_delayedBackgroundColour = FALSE;
-
 #ifdef __WXGTK20__
     m_imContext = NULL;
     m_x11Context = NULL;
@@ -2627,9 +2613,6 @@ bool wxWindowGTK::Create( wxWindow *parent,
 
     m_insertCallback = wxInsertChildInWindow;
 
-    // always needed for background clearing
-    m_delayedBackgroundColour = TRUE;
-
     m_widget = gtk_scrolled_window_new( (GtkAdjustment *) NULL, (GtkAdjustment *) NULL );
     GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 
@@ -2763,16 +2746,6 @@ wxWindowGTK::~wxWindowGTK()
         gdk_ic_attr_destroy (m_icattr);
 #endif
 
-    if (m_widgetStyle)
-    {
-#if DISABLE_STYLE_IF_BROKEN_THEME
-        // don't delete if it's a pixmap theme style
-        if (!m_widgetStyle->engine_data)
-            gtk_style_unref( m_widgetStyle );
-#endif
-        m_widgetStyle = (GtkStyle*) NULL;
-    }
-
     if (m_wxwindow)
     {
         gtk_widget_destroy( m_wxwindow );
@@ -3822,11 +3795,9 @@ void wxWindowGTK::GtkSendPaintEvents()
     // Clip to paint region in wxClientDC
     m_clipPaintRegion = TRUE;
 
-#ifndef __WXGTK20__
     // widget to draw on
     GtkPizza *pizza = GTK_PIZZA (m_wxwindow);
 
-    // later for GTK 2.0, too.
     if (GetThemeEnabled())
     {
         // find ancestor from which to steal background
@@ -3847,7 +3818,7 @@ void wxWindowGTK::GtkSendPaintEvents()
 
             gtk_paint_flat_box( parent->m_widget->style,
                         pizza->bin_window,
-                        GTK_STATE_NORMAL,
+                        (GtkStateType)GTK_WIDGET_STATE(m_wxwindow),
                         GTK_SHADOW_NONE,
                         &rect,
                         parent->m_widget,
@@ -3858,7 +3829,6 @@ void wxWindowGTK::GtkSendPaintEvents()
         }
     }
     else
-#endif
 
 #ifdef __WXGTK20__
     {
@@ -3993,68 +3963,24 @@ void wxWindowGTK::ApplyToolTip( GtkTooltips *tips, const wxChar *tip )
 }
 #endif // wxUSE_TOOLTIPS
 
-void wxWindowGTK::GtkSetBackgroundColour( const wxColour &colour )
-{
-    GdkWindow *window = (GdkWindow*) NULL;
-    if (m_wxwindow)
-        window = GTK_PIZZA(m_wxwindow)->bin_window;
-    else
-        window = GetConnectWidget()->window;
-
-    wxASSERT( window );
-
-    // We need the pixel value e.g. for background clearing.
-    m_backgroundColour.CalcPixel( gdk_window_get_colormap( window ) );
-
-    if (m_wxwindow)
-    {
-        // wxMSW doesn't clear the window here, either.
-        gdk_window_set_background( window, m_backgroundColour.GetColor() );
-    }
-
-    ApplyWidgetStyle();
-}
-
 bool wxWindowGTK::SetBackgroundColour( const wxColour &colour )
 {
     wxCHECK_MSG( m_widget != NULL, FALSE, wxT("invalid window") );
 
     if (!wxWindowBase::SetBackgroundColour(colour))
-        return FALSE;
-
-    GdkWindow *window = (GdkWindow*) NULL;
-    if (m_wxwindow)
-        window = GTK_PIZZA(m_wxwindow)->bin_window;
-    else
-        window = GetConnectWidget()->window;
+        return false;
 
-    if (!window)
-    {
-        // indicate that a new style has been set
-        // but it couldn't get applied as the
-        // widget hasn't been realized yet.
-        m_delayedBackgroundColour = TRUE;
-        return TRUE;
-    }
-    else
+    if (colour.Ok())
     {
-        GtkSetBackgroundColour( colour );
+        // We need the pixel value e.g. for background clearing.
+        m_backgroundColour.CalcPixel(gtk_widget_get_colormap(m_widget));
     }
 
-    return TRUE;
-}
+    // apply style change (forceStyle=true so that new style is applied
+    // even if the bg colour changed from valid to wxNullColour):
+    ApplyWidgetStyle(true);
 
-void wxWindowGTK::GtkSetForegroundColour( const wxColour &colour )
-{
-    GdkWindow *window = (GdkWindow*) NULL;
-    if (m_wxwindow)
-        window = GTK_PIZZA(m_wxwindow)->bin_window;
-    else
-        window = GetConnectWidget()->window;
-
-    wxASSERT( window );
-
-    ApplyWidgetStyle();
+    return true;
 }
 
 bool wxWindowGTK::SetForegroundColour( const wxColour &colour )
@@ -4063,30 +3989,20 @@ bool wxWindowGTK::SetForegroundColour( const wxColour &colour )
 
     if (!wxWindowBase::SetForegroundColour(colour))
     {
-        // don't leave if the GTK widget has just
-        // been realized
-        if (!m_delayedForegroundColour) return FALSE;
-    }
-
-    GdkWindow *window = (GdkWindow*) NULL;
-    if (m_wxwindow)
-        window = GTK_PIZZA(m_wxwindow)->bin_window;
-    else
-        window = GetConnectWidget()->window;
-
-    if (!window)
-    {
-        // indicate that a new style has been set
-        // but it couldn't get applied as the
-        // widget hasn't been realized yet.
-        m_delayedForegroundColour = TRUE;
+        return false;
     }
-    else
+    
+    if (colour.Ok())
     {
-       GtkSetForegroundColour( colour );
+        // We need the pixel value e.g. for background clearing.
+        m_foregroundColour.CalcPixel(gtk_widget_get_colormap(m_widget));
     }
 
-    return TRUE;
+    // apply style change (forceStyle=true so that new style is applied
+    // even if the bg colour changed from valid to wxNullColour):
+    ApplyWidgetStyle(true);
+
+    return true;
 }
 
 #ifdef __WXGTK20__
@@ -4103,137 +4019,92 @@ PangoContext *wxWindowGTK::GtkGetPangoX11Context()
     return m_x11Context;
 }
 #endif
-
-GtkStyle *wxWindowGTK::GetWidgetStyle()
+GtkRcStyle *wxWindowGTK::CreateWidgetStyle(bool forceStyle)
 {
-    if (m_widgetStyle)
+    // do we need to apply any changes at all?
+    if ( !forceStyle &&
+         !m_font.Ok() &&
+         !m_foregroundColour.Ok() && !m_backgroundColour.Ok() )
     {
-        GtkStyle *remake = gtk_style_copy( m_widgetStyle );
-
-        // FIXME: no more klass in 2.0
-#ifndef __WXGTK20__
-        remake->klass = m_widgetStyle->klass;
-#endif
-
-        gtk_style_unref( m_widgetStyle );
-        m_widgetStyle = remake;
+        return NULL;
     }
-    else
-    {
-        GtkStyle *def = gtk_rc_get_style( m_widget );
-
-        if (!def)
-            def = gtk_widget_get_default_style();
 
-        m_widgetStyle = gtk_style_copy( def );
+    GtkRcStyle *style = gtk_rc_style_new();
 
-        // FIXME: no more klass in 2.0
-#ifndef __WXGTK20__
-        m_widgetStyle->klass = def->klass;
+    if ( m_font.Ok() )
+    {
+#ifdef __WXGTK20__
+        style->font_desc = 
+            pango_font_description_copy( m_font.GetNativeFontInfo()->description );
+#else
+        wxString xfontname = m_font.GetNativeFontInfo()->GetXFontName();
+        style->fontset_name = g_strdup(xfontname.c_str());
 #endif
     }
 
-    return m_widgetStyle;
-}
-
-void wxWindowGTK::SetWidgetStyle()
-{
-#if DISABLE_STYLE_IF_BROKEN_THEME
-    if (m_widget->style->engine_data)
+    if ( m_foregroundColour.Ok() )
     {
-        static bool s_warningPrinted = FALSE;
-        if (!s_warningPrinted)
-        {
-            printf( "wxWidgets warning: Widget styles disabled due to buggy GTK theme.\n" );
-            s_warningPrinted = TRUE;
-        }
-        m_widgetStyle = m_widget->style;
-        return;
+        GdkColor *fg = m_foregroundColour.GetColor();
+        
+        style->fg[GTK_STATE_NORMAL] = *fg;
+        style->color_flags[GTK_STATE_NORMAL] = GTK_RC_FG;
+        
+        style->fg[GTK_STATE_PRELIGHT] = *fg;
+        style->color_flags[GTK_STATE_PRELIGHT] = GTK_RC_FG;
+        
+        style->fg[GTK_STATE_ACTIVE] = *fg;
+        style->color_flags[GTK_STATE_ACTIVE] = GTK_RC_FG;
     }
-#endif
-
-    GtkStyle *style = GetWidgetStyle();
 
-    if ( m_hasFont )
+    if ( m_backgroundColour.Ok() )
     {
-#ifdef __WXGTK20__
-        pango_font_description_free( style->font_desc );
-        style->font_desc = pango_font_description_copy( m_font.GetNativeFontInfo()->description );
-#else
-        gdk_font_unref( style->font );
-        style->font = gdk_font_ref( m_font.GetInternalFont( 1.0 ) );
-#endif
-    }
+        GdkColor *bg = m_backgroundColour.GetColor();
 
-    if ( m_hasFgCol )
-    {
-        m_foregroundColour.CalcPixel( gtk_widget_get_colormap( m_widget ) );
-        if (m_foregroundColour != wxSystemSettings::GetColour(wxSYS_COLOUR_BTNTEXT))
-        {
-            style->fg[GTK_STATE_NORMAL] = *m_foregroundColour.GetColor();
-            style->fg[GTK_STATE_PRELIGHT] = *m_foregroundColour.GetColor();
-            style->fg[GTK_STATE_ACTIVE] = *m_foregroundColour.GetColor();
-        }
-        else
-        {
-            // Try to restore the gtk default style.  This is still a little
-            // oversimplified for what is probably really needed here for controls
-            // other than buttons, but is better than not being able to (re)set a
-            // control's foreground colour to *wxBLACK -- RL
-            GtkStyle *def = gtk_rc_get_style( m_widget );
-
-            if (!def)
-                def = gtk_widget_get_default_style();
-
-            style->fg[GTK_STATE_NORMAL] = def->fg[GTK_STATE_NORMAL];
-            style->fg[GTK_STATE_PRELIGHT] = def->fg[GTK_STATE_PRELIGHT];
-            style->fg[GTK_STATE_ACTIVE] = def->fg[GTK_STATE_ACTIVE];
-        }
+        style->bg[GTK_STATE_NORMAL] = *bg;
+        style->base[GTK_STATE_NORMAL] = *bg;
+        style->color_flags[GTK_STATE_NORMAL] = (GtkRcFlags)
+            (style->color_flags[GTK_STATE_NORMAL] | GTK_RC_BG | GTK_RC_BASE);
+        
+        style->bg[GTK_STATE_PRELIGHT] = *bg;
+        style->base[GTK_STATE_PRELIGHT] = *bg;
+        style->color_flags[GTK_STATE_PRELIGHT] = (GtkRcFlags)
+            (style->color_flags[GTK_STATE_PRELIGHT] | GTK_RC_BG | GTK_RC_BASE);
+        
+        style->bg[GTK_STATE_ACTIVE] = *bg;
+        style->base[GTK_STATE_ACTIVE] = *bg;
+        style->color_flags[GTK_STATE_ACTIVE] = (GtkRcFlags)
+            (style->color_flags[GTK_STATE_ACTIVE] | GTK_RC_BG | GTK_RC_BASE);
+        
+        style->bg[GTK_STATE_INSENSITIVE] = *bg;
+        style->base[GTK_STATE_INSENSITIVE] = *bg;
+        style->color_flags[GTK_STATE_INSENSITIVE] = (GtkRcFlags)
+            (style->color_flags[GTK_STATE_INSENSITIVE] | GTK_RC_BG | GTK_RC_BASE);
     }
+    
+    return style;
+}
 
-    if ( m_hasBgCol && m_backgroundColour.Ok() )
+void wxWindowGTK::ApplyWidgetStyle(bool forceStyle)
+{
+    GtkRcStyle *style = CreateWidgetStyle(forceStyle);
+    if ( style )
     {
-        m_backgroundColour.CalcPixel( gtk_widget_get_colormap( m_widget ) );
-        if (m_backgroundColour != wxSystemSettings::GetColour(wxSYS_COLOUR_BTNFACE))
-        {
-            style->bg[GTK_STATE_NORMAL] = *m_backgroundColour.GetColor();
-            style->base[GTK_STATE_NORMAL] = *m_backgroundColour.GetColor();
-            style->bg[GTK_STATE_PRELIGHT] = *m_backgroundColour.GetColor();
-            style->base[GTK_STATE_PRELIGHT] = *m_backgroundColour.GetColor();
-            style->bg[GTK_STATE_ACTIVE] = *m_backgroundColour.GetColor();
-            style->base[GTK_STATE_ACTIVE] = *m_backgroundColour.GetColor();
-            style->bg[GTK_STATE_INSENSITIVE] = *m_backgroundColour.GetColor();
-            style->base[GTK_STATE_INSENSITIVE] = *m_backgroundColour.GetColor();
-        }
-        else
-        {
-            // Try to restore the gtk default style.  This is still a little
-            // oversimplified for what is probably really needed here for controls
-            // other than buttons, but is better than not being able to (re)set a
-            // control's background colour to default grey and means resetting a
-            // button to wxSYS_COLOUR_BTNFACE will restore its usual highlighting
-            // behavior -- RL
-            GtkStyle *def = gtk_rc_get_style( m_widget );
-
-            if (!def)
-                def = gtk_widget_get_default_style();
-
-            style->bg[GTK_STATE_NORMAL] = def->bg[GTK_STATE_NORMAL];
-            style->base[GTK_STATE_NORMAL] = def->base[GTK_STATE_NORMAL];
-            style->bg[GTK_STATE_PRELIGHT] = def->bg[GTK_STATE_PRELIGHT];
-            style->base[GTK_STATE_PRELIGHT] = def->base[GTK_STATE_PRELIGHT];
-            style->bg[GTK_STATE_ACTIVE] = def->bg[GTK_STATE_ACTIVE];
-            style->base[GTK_STATE_ACTIVE] = def->base[GTK_STATE_ACTIVE];
-            style->bg[GTK_STATE_INSENSITIVE] = def->bg[GTK_STATE_INSENSITIVE];
-            style->base[GTK_STATE_INSENSITIVE] = def->base[GTK_STATE_INSENSITIVE];
-        }
+        DoApplyWidgetStyle(style);
+        gtk_rc_style_unref(style);
     }
 }
 
-void wxWindowGTK::ApplyWidgetStyle()
+void wxWindowGTK::DoApplyWidgetStyle(GtkRcStyle *style)
 {
+    if (m_wxwindow)
+        // should we also do m_widget in this case?
+        gtk_widget_modify_style(m_wxwindow, style);
+    else
+        gtk_widget_modify_style(m_widget, style);
 }
 
+
 //-----------------------------------------------------------------------------
 // Pop-up menu stuff
 //-----------------------------------------------------------------------------
@@ -4262,61 +4133,66 @@ static void SetInvokingWindow( wxMenu *menu, wxWindowGTK *win )
     }
 }
 
-// used to pass the coordinates from wxWindowGTK::DoPopupMenu() to
-// wxPopupMenuPositionCallback()
-//
-// should be safe even in the MT case as the user can hardly popup 2 menus
-// simultaneously, can he?
-static gint gs_pop_x = 0;
-static gint gs_pop_y = 0;
-
 extern "C" void wxPopupMenuPositionCallback( GtkMenu *menu,
                                              gint *x, gint *y,
 #ifdef __WXGTK20__
                                              gboolean * WXUNUSED(whatever),
 #endif
-                                             gpointer WXUNUSED(user_data) )
+                                             gpointer user_data )
 {
     // ensure that the menu appears entirely on screen
     GtkRequisition req;
     gtk_widget_get_child_requisition(GTK_WIDGET(menu), &req);
 
     wxSize sizeScreen = wxGetDisplaySize();
+    wxPoint *pos = (wxPoint*)user_data;
 
     gint xmax = sizeScreen.x - req.width,
          ymax = sizeScreen.y - req.height;
 
-    *x = gs_pop_x < xmax ? gs_pop_x : xmax;
-    *y = gs_pop_y < ymax ? gs_pop_y : ymax;
+    *x = pos->x < xmax ? pos->x : xmax;
+    *y = pos->y < ymax ? pos->y : ymax;
 }
 
 bool wxWindowGTK::DoPopupMenu( wxMenu *menu, int x, int y )
 {
-    wxCHECK_MSG( m_widget != NULL, FALSE, wxT("invalid window") );
+    wxCHECK_MSG( m_widget != NULL, false, wxT("invalid window") );
 
-    wxCHECK_MSG( menu != NULL, FALSE, wxT("invalid popup-menu") );
+    wxCHECK_MSG( menu != NULL, false, wxT("invalid popup-menu") );
 
     SetInvokingWindow( menu, this );
 
     menu->UpdateUI();
 
-    gs_pop_x = x;
-    gs_pop_y = y;
-    ClientToScreen( &gs_pop_x, &gs_pop_y );
-
-    bool is_waiting = TRUE;
+    bool is_waiting = true;
 
     gtk_signal_connect( GTK_OBJECT(menu->m_menu),
                         "hide",
                         GTK_SIGNAL_FUNC(gtk_pop_hide_callback),
                         (gpointer)&is_waiting );
 
+    wxPoint pos;
+    gpointer userdata;
+    GtkMenuPositionFunc posfunc;
+    if ( x == -1 && y == -1 )
+    {
+        // use GTK's default positioning algorithm
+        userdata = NULL;
+        posfunc = NULL;
+    }
+    else
+    {
+        pos = ClientToScreen(wxPoint(x, y));
+        userdata = &pos;
+        posfunc = wxPopupMenuPositionCallback;
+    }
+
     gtk_menu_popup(
                   GTK_MENU(menu->m_menu),
                   (GtkWidget *) NULL,           // parent menu shell
                   (GtkWidget *) NULL,           // parent menu item
-                  wxPopupMenuPositionCallback,  // function to position it
-                  NULL,                         // client data
+                  posfunc,                      // function to position it
+                  userdata,                     // client data
                   0,                            // button used to activate it
 #ifdef __WXGTK20__
                   gtk_get_current_event_time()
@@ -4330,7 +4206,7 @@ bool wxWindowGTK::DoPopupMenu( wxMenu *menu, int x, int y )
         gtk_main_iteration();
     }
 
-    return TRUE;
+    return true;
 }
 
 #endif // wxUSE_MENUS_NATIVE
@@ -4371,24 +4247,16 @@ bool wxWindowGTK::IsOwnGtkWindow( GdkWindow *window )
 
 bool wxWindowGTK::SetFont( const wxFont &font )
 {
-    if (!wxWindowBase::SetFont(font) || !m_widget)
-    {
-        return FALSE;
-    }
+    wxCHECK_MSG( m_widget != NULL, FALSE, wxT("invalid window") );
 
-    wxColour sysbg = wxSystemSettings::GetColour( wxSYS_COLOUR_BTNFACE );
-    if ( sysbg == m_backgroundColour )
-    {
-        m_backgroundColour = wxNullColour;
-        ApplyWidgetStyle();
-        m_backgroundColour = sysbg;
-    }
-    else
-    {
-        ApplyWidgetStyle();
-    }
+    if (!wxWindowBase::SetFont(font))
+        return false;
 
-    return TRUE;
+    // apply style change (forceStyle=true so that new style is applied
+    // even if the font changed from valid to wxNullFont):
+    ApplyWidgetStyle(true);    
+
+    return true;
 }
 
 void wxWindowGTK::DoCaptureMouse()