mac paths updated
[wxWidgets.git] / src / gtk / settings.cpp
index 5bcfff6c21d80f697ce7d32faa0ba4f0ccc50564..c7f240d747fa00129aa9b5bc10fbdffded4b8436 100644 (file)
@@ -1,63 +1,75 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        gtk/settings.cpp
+// Name:        src/gtk/settings.cpp
 // Purpose:
 // Author:      Robert Roebling
+// Modified by: Mart Raudsepp (GetMetric)
 // Id:          $Id$
 // Copyright:   (c) 1998 Robert Roebling
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
-
-#ifdef __GNUG__
-#pragma implementation "settings.h"
-#endif
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
 
 #include "wx/settings.h"
-#include "wx/debug.h"
-#include "wx/module.h"
-#include "wx/cmndata.h"
 
-#include <gdk/gdk.h>
-#include <gdk/gdkprivate.h>
-#include <gtk/gtk.h>
+#ifndef WX_PRECOMP
+    #include "wx/cmndata.h"
+    #include "wx/toplevel.h"
+#endif
 
-#define SHIFT (8*(sizeof(short int)-sizeof(char)))
+#include "wx/fontutil.h"
 
-//wxColour *g_systemWinColour          = (wxColour *) NULL;
-wxColour *g_systemBtnFaceColour       = (wxColour *) NULL;
-wxColour *g_systemBtnShadowColour     = (wxColour *) NULL;
-wxColour *g_systemBtnHighlightColour  = (wxColour *) NULL;
-wxColour *g_systemHighlightColour     = (wxColour *) NULL;
-wxColour *g_systemHighlightTextColour = (wxColour *) NULL;
-wxColour *g_systemListBoxColour       = (wxColour *) NULL;
-wxColour *g_systemBtnTextColour       = (wxColour *) NULL;
+#include <gtk/gtkversion.h>
+#if GTK_CHECK_VERSION(2, 9, 0)
+    // gtk_object_sink
+    #undef GTK_DISABLE_DEPRECATED
+#endif
+#include <gtk/gtk.h>
 
-wxFont *g_systemFont = (wxFont *) NULL;
+bool wxGetFrameExtents(GdkWindow* window, int* left, int* right, int* top, int* bottom);
 
 // ----------------------------------------------------------------------------
-// wxSystemSettingsModule
+// wxSystemObjects
 // ----------------------------------------------------------------------------
 
-class wxSystemSettingsModule : public wxModule
+struct wxSystemObjects
 {
-public:
-    bool OnInit() { return TRUE; }
-    void OnExit()
-    {
-        //delete g_systemWinColour;
-        delete g_systemBtnFaceColour;
-        delete g_systemBtnShadowColour;
-        delete g_systemBtnHighlightColour;
-        delete g_systemHighlightColour;
-        delete g_systemHighlightTextColour;
-        delete g_systemListBoxColour;
-        delete g_systemFont;
-        delete g_systemBtnTextColour;
-    }
-    DECLARE_DYNAMIC_CLASS(wxSystemSettingsModule)
+    wxColour m_colBtnFace,
+             m_colBtnShadow,
+             m_colBtnHighlight,
+             m_colHighlight,
+             m_colHighlightText,
+             m_colListBox,
+             m_colWindow,
+             m_colWindowText,
+             m_colBtnText,
+             m_colMenuItemHighlight,
+             m_colTooltip,
+             m_colTooltipText,
+             m_colMenubarBg;
+
+    wxFont m_fontSystem;
 };
 
-IMPLEMENT_DYNAMIC_CLASS(wxSystemSettingsModule, wxModule)
+static wxSystemObjects gs_objects;
+
+void wxClearGtkSystemObjects()
+{
+    gs_objects.m_colBtnFace = wxColour();
+    gs_objects.m_colBtnShadow = wxColour();
+    gs_objects.m_colBtnHighlight = wxColour();
+    gs_objects.m_colHighlightText = wxColour();
+    gs_objects.m_colListBox = wxColour();
+    gs_objects.m_colWindow = wxColour();
+    gs_objects.m_colWindowText = wxColour();
+    gs_objects.m_colBtnText = wxColour();
+    gs_objects.m_colMenuItemHighlight = wxColour();
+    gs_objects.m_colTooltip = wxColour();
+    gs_objects.m_colTooltipText = wxColour();
+    gs_objects.m_colMenubarBg = wxColour();
+    gs_objects.m_fontSystem = wxNullFont;
+}
 
 // ----------------------------------------------------------------------------
 // wxSystemSettings implementation
@@ -67,7 +79,10 @@ IMPLEMENT_DYNAMIC_CLASS(wxSystemSettingsModule, wxModule)
 enum wxGtkWidgetType
 {
     wxGTK_BUTTON,
-    wxGTK_LIST
+    wxGTK_LIST,
+    wxGTK_MENUITEM,
+    wxGTK_TEXTCTRL,
+    wxGTK_MENUBAR, 
 };
 
 // the colour we need
@@ -79,8 +94,8 @@ enum wxGtkColourType
 };
 
 // wxSystemSettings::GetColour() helper: get the colours from a GTK+
-// widget style, return true if we did get them, false to use defaults
-static bool GetColourFromGTKWidget(int& red, int& green, int& blue,
+// widget style, return true if we did get them
+static bool GetColourFromGTKWidget(GdkColor& gdkColor,
                                    wxGtkWidgetType type = wxGTK_BUTTON,
                                    GtkStateType state = GTK_STATE_NORMAL,
                                    wxGtkColourType colour = wxGTK_BG)
@@ -96,18 +111,31 @@ static bool GetColourFromGTKWidget(int& red, int& green, int& blue,
             widget = gtk_button_new();
             break;
 
+        case wxGTK_TEXTCTRL:
+            widget = gtk_text_view_new();
+            break;
+
         case wxGTK_LIST:
-            widget = gtk_list_new();
+            widget = gtk_tree_view_new_with_model(
+                (GtkTreeModel*)gtk_list_store_new(1, G_TYPE_INT));
+            break;
+
+        case wxGTK_MENUITEM:
+            widget = gtk_menu_item_new();
+            break;
+
+        case wxGTK_MENUBAR:
+            widget = gtk_menu_bar_new();
+            break;
     }
 
     GtkStyle *def = gtk_rc_get_style( widget );
     if ( !def )
         def = gtk_widget_get_default_style();
 
-    bool ok;
-    if ( def )
+    const bool ok = def != NULL;
+    if (ok)
     {
-        GdkColor *col;
         switch ( colour )
         {
             default:
@@ -115,244 +143,416 @@ static bool GetColourFromGTKWidget(int& red, int& green, int& blue,
                 // fall through
 
             case wxGTK_FG:
-                col = def->fg;
+                gdkColor = def->fg[state];
                 break;
 
             case wxGTK_BG:
-                col = def->bg;
+                gdkColor = def->bg[state];
                 break;
 
             case wxGTK_BASE:
-                col = def->base;
+                gdkColor = def->base[state];
                 break;
         }
-
-        red = col[state].red;
-        green = col[state].green;
-        blue = col[state].blue;
-
-        ok = TRUE;
-    }
-    else
-    {
-        ok = FALSE;
     }
 
-    gtk_widget_destroy( widget );
+    gtk_object_sink((GtkObject*)widget);
 
     return ok;
 }
 
+static void GetTooltipColors()
+{
+    GtkWidget* widget = gtk_window_new(GTK_WINDOW_POPUP);
+    const char* name = "gtk-tooltip";
+    if (gtk_check_version(2, 11, 0))
+        name = "gtk-tooltips";
+    gtk_widget_set_name(widget, name);
+    gtk_widget_ensure_style(widget);
+
+    GdkColor c = widget->style->bg[GTK_STATE_NORMAL];
+    gs_objects.m_colTooltip = wxColor(c);
+    c = widget->style->fg[GTK_STATE_NORMAL];
+    gs_objects.m_colTooltipText = wxColor(c);
+
+    gtk_widget_destroy(widget);
+}
+
 wxColour wxSystemSettingsNative::GetColour( wxSystemColour index )
 {
+    wxColor color;
+    GdkColor gdkColor;
     switch (index)
     {
         case wxSYS_COLOUR_SCROLLBAR:
         case wxSYS_COLOUR_BACKGROUND:
-        case wxSYS_COLOUR_ACTIVECAPTION:
         case wxSYS_COLOUR_INACTIVECAPTION:
         case wxSYS_COLOUR_MENU:
         case wxSYS_COLOUR_WINDOWFRAME:
         case wxSYS_COLOUR_ACTIVEBORDER:
         case wxSYS_COLOUR_INACTIVEBORDER:
         case wxSYS_COLOUR_BTNFACE:
-        case wxSYS_COLOUR_MENUBAR:
         case wxSYS_COLOUR_3DLIGHT:
-            if (!g_systemBtnFaceColour)
+            if (!gs_objects.m_colBtnFace.Ok())
             {
-                int red, green, blue;
-                if ( !GetColourFromGTKWidget(red, green, blue) )
-                {
-                    red =
-                    green = 0;
-                    blue = 0x9c40;
-                }
-
-                g_systemBtnFaceColour = new wxColour( red   >> SHIFT,
-                                                      green >> SHIFT,
-                                                      blue  >> SHIFT );
+                gdkColor.red =
+                gdkColor.green = 0;
+                gdkColor.blue = 0x9c40;
+                GetColourFromGTKWidget(gdkColor);
+                gs_objects.m_colBtnFace = wxColor(gdkColor);
             }
-            return *g_systemBtnFaceColour;
+            color = gs_objects.m_colBtnFace;
+            break;
 
         case wxSYS_COLOUR_WINDOW:
-            return *wxWHITE;
+            if (!gs_objects.m_colWindow.Ok())
+            {
+                gdkColor.red =
+                gdkColor.green =
+                gdkColor.blue = 0xFFFF;
+                GetColourFromGTKWidget(gdkColor, wxGTK_TEXTCTRL, GTK_STATE_NORMAL, wxGTK_BASE);
+                gs_objects.m_colWindow = wxColor(gdkColor);
+            }
+            color = gs_objects.m_colWindow;
+            break;
+
+
+        case wxSYS_COLOUR_MENUBAR:
+            if (!gs_objects.m_colMenubarBg.Ok())
+            {
+                gdkColor.red =
+                gdkColor.green = 0;
+                gdkColor.blue = 0x9c40;
+                GetColourFromGTKWidget(gdkColor,wxGTK_MENUBAR);
+                gs_objects.m_colMenubarBg = wxColor(gdkColor);
+            }
+            color = gs_objects.m_colMenubarBg;
+            break;
 
         case wxSYS_COLOUR_3DDKSHADOW:
-            return *wxBLACK;
+            color = *wxBLACK;
+            break;
 
         case wxSYS_COLOUR_GRAYTEXT:
         case wxSYS_COLOUR_BTNSHADOW:
         //case wxSYS_COLOUR_3DSHADOW:
-            if (!g_systemBtnShadowColour)
+            if (!gs_objects.m_colBtnShadow.Ok())
             {
                 wxColour faceColour(GetColour(wxSYS_COLOUR_3DFACE));
-                g_systemBtnShadowColour =
-                   new wxColour((unsigned char) (faceColour.Red() * 0.666),
-                                (unsigned char) (faceColour.Green() * 0.666),
-                                (unsigned char) (faceColour.Blue() * 0.666));
+                gs_objects.m_colBtnShadow =
+                   wxColour((unsigned char) (faceColour.Red() * 2 / 3),
+                            (unsigned char) (faceColour.Green() * 2 / 3),
+                            (unsigned char) (faceColour.Blue() * 2 / 3));
             }
-
-            return *g_systemBtnShadowColour;
+            color = gs_objects.m_colBtnShadow;
+            break;
 
         case wxSYS_COLOUR_3DHIGHLIGHT:
         //case wxSYS_COLOUR_BTNHIGHLIGHT:
-            return * wxWHITE;
-/* I think this should normally be white (JACS 8/2000)
-
-   Hmm, I'm quite sure it shouldn't ... (VZ 20.08.01)
-            if (!g_systemBtnHighlightColour)
-            {
-                g_systemBtnHighlightColour =
-                    new wxColour( 0xea60 >> SHIFT,
-                                  0xea60 >> SHIFT,
-                                  0xea60 >> SHIFT );
-            }
-            return *g_systemBtnHighlightColour;
-*/
+            color = *wxWHITE;
+            break;
 
         case wxSYS_COLOUR_HIGHLIGHT:
-            if (!g_systemHighlightColour)
+            if (!gs_objects.m_colHighlight.Ok())
             {
-                int red, green, blue;
-                if ( !GetColourFromGTKWidget(red, green, blue,
-                                             wxGTK_BUTTON,
-                                             GTK_STATE_SELECTED) )
-                {
-                    red =
-                    green = 0;
-                    blue = 0x9c40;
-                }
-
-                g_systemHighlightColour = new wxColour( red   >> SHIFT,
-                                                        green >> SHIFT,
-                                                        blue  >> SHIFT );
+                gdkColor.red =
+                gdkColor.green = 0;
+                gdkColor.blue = 0x9c40;
+                GetColourFromGTKWidget(
+                    gdkColor, wxGTK_BUTTON, GTK_STATE_SELECTED);
+                gs_objects.m_colHighlight = wxColour(gdkColor);
             }
-            return *g_systemHighlightColour;
+            color = gs_objects.m_colHighlight;
+            break;
 
         case wxSYS_COLOUR_LISTBOX:
-            if (!g_systemListBoxColour)
+            if (!gs_objects.m_colListBox.Ok())
             {
-                int red, green, blue;
-                if ( GetColourFromGTKWidget(red, green, blue,
+                if ( GetColourFromGTKWidget(gdkColor,
                                             wxGTK_LIST,
                                             GTK_STATE_NORMAL,
                                             wxGTK_BASE) )
                 {
-                    g_systemListBoxColour = new wxColour( red   >> SHIFT,
-                                                          green >> SHIFT,
-                                                          blue  >> SHIFT );
+                    gs_objects.m_colListBox = wxColour(gdkColor);
                 }
                 else
                 {
-                    g_systemListBoxColour = new wxColour(*wxWHITE);
+                    gs_objects.m_colListBox = *wxWHITE;
                 }
             }
-            return *g_systemListBoxColour;
+            color = gs_objects.m_colListBox;
+            break;
 
         case wxSYS_COLOUR_MENUTEXT:
         case wxSYS_COLOUR_WINDOWTEXT:
         case wxSYS_COLOUR_CAPTIONTEXT:
         case wxSYS_COLOUR_INACTIVECAPTIONTEXT:
         case wxSYS_COLOUR_BTNTEXT:
-        case wxSYS_COLOUR_INFOTEXT:
-            if (!g_systemBtnTextColour)
+            if (!gs_objects.m_colBtnText.Ok())
             {
-                int red, green, blue;
-                if ( !GetColourFromGTKWidget(red, green, blue,
-                                             wxGTK_BUTTON,
-                                             GTK_STATE_NORMAL,
-                                             wxGTK_FG) )
-                {
-                    red =
-                    green =
-                    blue = 0;
-                }
-
-                g_systemBtnTextColour = new wxColour( red   >> SHIFT,
-                                                      green >> SHIFT,
-                                                      blue  >> SHIFT );
+                gdkColor.red =
+                gdkColor.green =
+                gdkColor.blue = 0;
+                GetColourFromGTKWidget(
+                    gdkColor, wxGTK_BUTTON, GTK_STATE_NORMAL, wxGTK_FG);
+                gs_objects.m_colBtnText = wxColour(gdkColor);
             }
-            return *g_systemBtnTextColour;
+            color = gs_objects.m_colBtnText;
+            break;
 
-            // this (as well as wxSYS_COLOUR_INFOTEXT above) is used for
-            // tooltip windows - Robert, please change this code to use the
-            // real GTK tooltips when/if you can (TODO)
         case wxSYS_COLOUR_INFOBK:
-            return wxColour(255, 255, 225);
+            if (!gs_objects.m_colTooltip.Ok()) {
+                GetTooltipColors();
+            }
+            color = gs_objects.m_colTooltip;
+            break;
+
+        case wxSYS_COLOUR_INFOTEXT:
+            if (!gs_objects.m_colTooltipText.Ok()) {
+                GetTooltipColors();
+            }
+            color = gs_objects.m_colTooltipText;
+            break;
 
         case wxSYS_COLOUR_HIGHLIGHTTEXT:
-            if (!g_systemHighlightTextColour)
+            if (!gs_objects.m_colHighlightText.Ok())
             {
-                wxColour hclr = GetColour(wxSYS_COLOUR_HIGHLIGHT);
-                if (hclr.Red() > 200 && hclr.Green() > 200 && hclr.Blue() > 200)
-                    g_systemHighlightTextColour = new wxColour(*wxBLACK);
-                else
-                    g_systemHighlightTextColour = new wxColour(*wxWHITE);
+                gdkColor.red =
+                gdkColor.green =
+                gdkColor.blue = 0;
+                GetColourFromGTKWidget(
+                    gdkColor, wxGTK_BUTTON, GTK_STATE_SELECTED, wxGTK_FG);
+                gs_objects.m_colHighlightText = wxColour(gdkColor);
             }
-            return *g_systemHighlightTextColour;
+            color = gs_objects.m_colHighlightText;
+            break;
 
         case wxSYS_COLOUR_APPWORKSPACE:
-            return *wxWHITE;    // ?
+            color = *wxWHITE;    // ?
+            break;
+
+        case wxSYS_COLOUR_ACTIVECAPTION:
+        case wxSYS_COLOUR_MENUHILIGHT:
+            if (!gs_objects.m_colMenuItemHighlight.Ok())
+            {
+                gdkColor.red =
+                gdkColor.green =
+                gdkColor.blue = 0;
+                GetColourFromGTKWidget(
+                    gdkColor, wxGTK_MENUITEM, GTK_STATE_SELECTED, wxGTK_BG);
+                gs_objects.m_colMenuItemHighlight = wxColour(gdkColor);
+            }
+            color = gs_objects.m_colMenuItemHighlight;
+            break;
 
         case wxSYS_COLOUR_HOTLIGHT:
         case wxSYS_COLOUR_GRADIENTACTIVECAPTION:
         case wxSYS_COLOUR_GRADIENTINACTIVECAPTION:
-        case wxSYS_COLOUR_MENUHILIGHT:
             // TODO
-            return *wxBLACK;
+            color = *wxBLACK;
+            break;
 
         case wxSYS_COLOUR_MAX:
         default:
             wxFAIL_MSG( _T("unknown system colour index") );
-  }
+            color = *wxWHITE;
+            break;
+    }
 
-  return *wxWHITE;
+    return color;
 }
 
 wxFont wxSystemSettingsNative::GetFont( wxSystemFont index )
 {
+    wxFont font;
     switch (index)
     {
         case wxSYS_OEM_FIXED_FONT:
         case wxSYS_ANSI_FIXED_FONT:
         case wxSYS_SYSTEM_FIXED_FONT:
-        {
-            return *wxNORMAL_FONT;
-        }
+            font = *wxNORMAL_FONT;
+            break;
+
         case wxSYS_ANSI_VAR_FONT:
         case wxSYS_SYSTEM_FONT:
         case wxSYS_DEVICE_DEFAULT_FONT:
         case wxSYS_DEFAULT_GUI_FONT:
-        {
-            if (!g_systemFont)
+            if (!gs_objects.m_fontSystem.Ok())
             {
-                g_systemFont = new wxFont( 12, wxSWISS, wxNORMAL, wxNORMAL );
-
+                GtkWidget *widget = gtk_button_new();
+                GtkStyle *def = gtk_rc_get_style( widget );
+                if ( !def || !def->font_desc )
+                    def = gtk_widget_get_default_style();
+                if ( def && def->font_desc )
+                {
+                    wxNativeFontInfo info;
+                    info.description =
+                        pango_font_description_copy(def->font_desc);
+                    gs_objects.m_fontSystem = wxFont(info);
+                }
+                else
+                {
+                    GtkSettings *settings = gtk_settings_get_default();
+                    gchar *font_name = NULL;
+                    g_object_get ( settings,
+                                   "gtk-font-name",
+                                   &font_name,
+                                   NULL);
+                    if (!font_name)
+                        gs_objects.m_fontSystem = wxFont( 12, wxSWISS, wxNORMAL, wxNORMAL );
+                    else
+                        gs_objects.m_fontSystem = wxFont(wxString::FromAscii(font_name));
+                    g_free (font_name);
+                }
+                gtk_object_sink((GtkObject*)widget);
             }
-            return *g_systemFont;
-        }
+            font = gs_objects.m_fontSystem;
+            break;
 
         default:
-            return wxNullFont;
+            break;
     }
+    return font;
+}
+
+// helper: return the GtkSettings either for the screen the current window is
+// on or for the default screen if window is NULL
+static GtkSettings *GetSettingsForWindowScreen(GdkWindow *window)
+{
+    return window ? gtk_settings_get_for_screen(gdk_drawable_get_screen(window))
+                  : gtk_settings_get_default();
 }
 
-int wxSystemSettingsNative::GetMetric( wxSystemMetric index )
+int wxSystemSettingsNative::GetMetric( wxSystemMetric index, wxWindow* win )
 {
+    GdkWindow *window = NULL;
+    if(win && GTK_WIDGET_REALIZED(win->GetHandle()))
+        window = win->GetHandle()->window;
+
     switch (index)
     {
-        case wxSYS_SCREEN_X:   return gdk_screen_width();
-        case wxSYS_SCREEN_Y:   return gdk_screen_height();
-        case wxSYS_HSCROLL_Y:  return 15;
-        case wxSYS_VSCROLL_X:  return 15;
+        case wxSYS_BORDER_X:
+        case wxSYS_BORDER_Y:
+        case wxSYS_EDGE_X:
+        case wxSYS_EDGE_Y:
+        case wxSYS_FRAMESIZE_X:
+        case wxSYS_FRAMESIZE_Y:
+            // If a window is specified/realized, and it is a toplevel window, we can query from wm.
+            // The returned border thickness is outside the client area in that case.
+            if (window)
+            {
+                wxTopLevelWindow *tlw = wxDynamicCast(win, wxTopLevelWindow);
+                if (!tlw)
+                    return -1; // not a tlw, not sure how to approach
+                else
+                {
+                    // Get the frame extents from the windowmanager.
+                    // In most cases the top extent is the titlebar, so we use the bottom extent
+                    // for the heights.
+                    int right, bottom;
+                    if (wxGetFrameExtents(window, NULL, &right, NULL, &bottom))
+                    {
+                        switch (index)
+                        {
+                            case wxSYS_BORDER_X:
+                            case wxSYS_EDGE_X:
+                            case wxSYS_FRAMESIZE_X:
+                                return right; // width of right extent
+                            default:
+                                return bottom; // height of bottom extent
+                        }
+                    }
+                }
+            }
+
+            return -1; // no window specified
+
+        case wxSYS_CURSOR_X:
+        case wxSYS_CURSOR_Y:
+                return gdk_display_get_default_cursor_size(
+                            window ? gdk_drawable_get_display(window)
+                                   : gdk_display_get_default());
+
+        case wxSYS_DCLICK_X:
+        case wxSYS_DCLICK_Y:
+            gint dclick_distance;
+            g_object_get(GetSettingsForWindowScreen(window),
+                            "gtk-double-click-distance", &dclick_distance, NULL);
+
+            return dclick_distance * 2;
+
+        case wxSYS_DCLICK_MSEC:
+            gint dclick;
+            g_object_get(GetSettingsForWindowScreen(window),
+                            "gtk-double-click-time", &dclick, NULL);
+            return dclick;
+
+        case wxSYS_DRAG_X:
+        case wxSYS_DRAG_Y:
+            gint drag_threshold;
+            g_object_get(GetSettingsForWindowScreen(window),
+                            "gtk-dnd-drag-threshold", &drag_threshold, NULL);
+
+            // The correct thing here would be to double the value
+            // since that is what the API wants. But the values
+            // are much bigger under GNOME than under Windows and
+            // just seem to much in many cases to be useful.
+            // drag_threshold *= 2;
+
+            return drag_threshold;
+
+        case wxSYS_ICON_X:
+        case wxSYS_ICON_Y:
+            return 32;
+
+        case wxSYS_SCREEN_X:
+            if (window)
+                return gdk_screen_get_width(gdk_drawable_get_screen(window));
+            else
+                return gdk_screen_width();
+
+        case wxSYS_SCREEN_Y:
+            if (window)
+                return gdk_screen_get_height(gdk_drawable_get_screen(window));
+            else
+                return gdk_screen_height();
+
+        case wxSYS_HSCROLL_Y:
+        case wxSYS_VSCROLL_X:
+            return 15;
+
+        case wxSYS_CAPTION_Y:
+            if (!window)
+                // No realized window specified, and no implementation for that case yet.
+                return -1;
+
+            wxASSERT_MSG( wxDynamicCast(win, wxTopLevelWindow),
+                          wxT("Asking for caption height of a non toplevel window") );
+
+            // Get the height of the top windowmanager border.
+            // This is the titlebar in most cases. The titlebar might be elsewhere, and
+            // we could check which is the thickest wm border to decide on which side the
+            // titlebar is, but this might lead to interesting behaviours in used code.
+            // Reconsider when we have a way to report to the user on which side it is.
+            {
+                int top;
+                if (wxGetFrameExtents(window, NULL, NULL, &top, NULL))
+                {
+                    return top; // top frame extent
+                }
+            }
+
+            // Try a default approach without a window pointer, if possible
+            // ...
 
-        // VZ: is there any way to get the cursor size with GDK?
-        case wxSYS_CURSOR_X:   return 16;
-        case wxSYS_CURSOR_Y:   return 16;
+            return -1;
 
-        default:               
-            wxFAIL_MSG( wxT("wxSystemSettings::GetMetric not fully implemented") );
+        case wxSYS_PENWINDOWS_PRESENT:
+            // No MS Windows for Pen computing extension available in X11 based gtk+.
             return 0;
+
+        default:
+            return -1;   // metric is unknown
     }
 }
 
@@ -360,13 +560,13 @@ bool wxSystemSettingsNative::HasFeature(wxSystemFeature index)
 {
     switch (index)
     {
-        case wxSYS_CAN_ICONIZE_FRAME: 
-            return FALSE; 
-            break;
+        case wxSYS_CAN_ICONIZE_FRAME:
+            return false;
+
         case wxSYS_CAN_DRAW_FRAME_DECORATIONS:
-            return TRUE; 
-            break;
+            return true;
+
         default:
-            return FALSE;
+            return false;
     }
 }