check that the version of __sync_sub_and_fetch that returns a value is supported...

[wxWidgets.git] / src / gtk / settings.cpp

diff --git a/src/gtk/settings.cpp b/src/gtk/settings.cpp
index 2fde66188cf401d320ed446f8462948e4c4e51e8..b36978475ac9b1b5949fe72ad61b5e1484518adc 100644 (file)
--- a/src/gtk/settings.cpp
+++ b/src/gtk/settings.cpp
@@ -1,210 +1,598 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        settings.cpp
+// Name:        src/gtk/settings.cpp

 // Purpose:
 // Author:      Robert Roebling
 // Purpose:
 // Author:      Robert Roebling

+// Modified by: Mart Raudsepp (GetMetric)

 // Id:          $Id$
 // Copyright:   (c) 1998 Robert Roebling
 // Id:          $Id$
 // Copyright:   (c) 1998 Robert Roebling

-// Licence:    wxWindows licence
+// Licence:     wxWindows licence

 /////////////////////////////////////////////////////////////////////////////
 
 /////////////////////////////////////////////////////////////////////////////
 

+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"

 
 

-#ifdef __GNUG__
-#pragma implementation "settings.h"
+#include "wx/settings.h"
+
+#ifndef WX_PRECOMP
+    #include "wx/cmndata.h"
+    #include "wx/toplevel.h"

 #endif
 
 #endif
 

-#include "wx/settings.h"
-#include "wx/debug.h"
+#include "wx/fontutil.h"

 
 

-#include <gdk/gdk.h>
+#include <gtk/gtkversion.h>
+#if GTK_CHECK_VERSION(2, 9, 0)
+    // gtk_object_sink
+    #undef GTK_DISABLE_DEPRECATED
+#endif

 #include <gtk/gtk.h>
 #include <gtk/gtk.h>

+#include <gdk/gdkx.h>
+
+#include <X11/Xatom.h>
+
+// ----------------------------------------------------------------------------
+// wxSystemObjects
+// ----------------------------------------------------------------------------
+
+struct wxSystemObjects
+{
+    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;
+
+    wxFont m_fontSystem;
+};
+
+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_fontSystem = wxNullFont;
+}
+
+// ----------------------------------------------------------------------------
+// wxSystemSettings implementation
+// ----------------------------------------------------------------------------
+
+// kind of widget to use in GetColourFromGTKWidget
+enum wxGtkWidgetType
+{
+    wxGTK_BUTTON,
+    wxGTK_LIST,
+    wxGTK_MENUITEM,
+    wxGTK_TEXTCTRL
+};
+
+// the colour we need
+enum wxGtkColourType
+{
+    wxGTK_FG,
+    wxGTK_BG,
+    wxGTK_BASE
+};

 
 

-/*
-#define wxSYS_COLOUR_SCROLLBAR         0
-#define wxSYS_COLOUR_BACKGROUND        1
-#define wxSYS_COLOUR_ACTIVECAPTION     2
-#define wxSYS_COLOUR_INACTIVECAPTION   3
-#define wxSYS_COLOUR_MENU              4
-#define wxSYS_COLOUR_WINDOW            5
-#define wxSYS_COLOUR_WINDOWFRAME       6
-#define wxSYS_COLOUR_MENUTEXT          7
-#define wxSYS_COLOUR_WINDOWTEXT        8
-#define wxSYS_COLOUR_CAPTIONTEXT       9
-#define wxSYS_COLOUR_ACTIVEBORDER      10
-#define wxSYS_COLOUR_INACTIVEBORDER    11
-#define wxSYS_COLOUR_APPWORKSPACE      12
-#define wxSYS_COLOUR_HIGHLIGHT         13
-#define wxSYS_COLOUR_HIGHLIGHTTEXT     14
-#define wxSYS_COLOUR_BTNFACE           15
-#define wxSYS_COLOUR_BTNSHADOW         16
-#define wxSYS_COLOUR_GRAYTEXT          17
-#define wxSYS_COLOUR_BTNTEXT           18
-#define wxSYS_COLOUR_INACTIVECAPTIONTEXT 19
-#define wxSYS_COLOUR_BTNHIGHLIGHT      20
-
-#define wxSYS_COLOUR_3DDKSHADOW        21
-#define wxSYS_COLOUR_3DLIGHT           22
-#define wxSYS_COLOUR_INFOTEXT          23
-#define wxSYS_COLOUR_INFOBK            24
-
-#define wxSYS_COLOUR_DESKTOP           wxSYS_COLOUR_BACKGROUND
-#define wxSYS_COLOUR_3DFACE            wxSYS_COLOUR_BTNFACE
-#define wxSYS_COLOUR_3DSHADOW          wxSYS_COLOUR_BTNSHADOW
-#define wxSYS_COLOUR_3DHIGHLIGHT       wxSYS_COLOUR_BTNHIGHLIGHT
-#define wxSYS_COLOUR_3DHILIGHT         wxSYS_COLOUR_BTNHIGHLIGHT
-#define wxSYS_COLOUR_BTNHILIGHT        wxSYS_COLOUR_BTNHIGHLIGHT
-*/
-
-#define SHIFT (8*(sizeof(short int)-sizeof(char)))
-
-//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;
-
-wxFont *g_systemFont = (wxFont *) NULL;
-
-void wxSystemSettings::Done() 
+// wxSystemSettings::GetColour() helper: get the colours from a GTK+
+// 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)

 {
 {

-//    delete g_systemWinColour;
-    delete g_systemBtnFaceColour;
-    delete g_systemBtnShadowColour;
-    delete g_systemBtnHighlightColour;
-    delete g_systemHighlightColour;
-    delete g_systemFont;
+    GtkWidget *widget;
+    switch ( type )
+    {
+        default:
+            wxFAIL_MSG( _T("unexpected GTK widget type") );
+            // fall through
+
+        case wxGTK_BUTTON:
+            widget = gtk_button_new();
+            break;
+
+        case wxGTK_TEXTCTRL:
+            widget = gtk_text_view_new();
+            break;
+
+        case wxGTK_LIST:
+            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();
+    }
+
+    GtkStyle *def = gtk_rc_get_style( widget );
+    if ( !def )
+        def = gtk_widget_get_default_style();
+
+    const bool ok = def != NULL;
+    if (ok)
+    {
+        switch ( colour )
+        {
+            default:
+                wxFAIL_MSG( _T("unexpected GTK colour type") );
+                // fall through
+
+            case wxGTK_FG:
+                gdkColor = def->fg[state];
+                break;
+
+            case wxGTK_BG:
+                gdkColor = def->bg[state];
+                break;
+
+            case wxGTK_BASE:
+                gdkColor = def->base[state];
+                break;
+        }
+    }
+
+    gtk_object_sink((GtkObject*)widget);
+
+    return ok;

 }
 
 }
 

-wxColour wxSystemSettings::GetSystemColour( int index )
+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:
     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_INACTIVECAPTION:
         case wxSYS_COLOUR_MENU:
         case wxSYS_COLOUR_WINDOWFRAME:
         case wxSYS_COLOUR_ACTIVEBORDER:
         case wxSYS_COLOUR_INACTIVEBORDER:
         case wxSYS_COLOUR_BTNFACE:

-        {
-            if (!g_systemBtnFaceColour)
+        case wxSYS_COLOUR_MENUBAR:
+        case wxSYS_COLOUR_3DLIGHT:
+            if (!gs_objects.m_colBtnFace.Ok())

             {
             {

-                g_systemBtnFaceColour = 
-                       new wxColour( 0xd6d6 >> SHIFT,
-                                     0xd6d6 >> SHIFT,
-                                             0xd6d6 >> 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:
         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_3DDKSHADOW:
+            color = *wxBLACK;
+            break;
+

         case wxSYS_COLOUR_GRAYTEXT:
         case wxSYS_COLOUR_BTNSHADOW:
         case wxSYS_COLOUR_GRAYTEXT:
         case wxSYS_COLOUR_BTNSHADOW:

-        {
-            if (!g_systemBtnShadowColour)
+        //case wxSYS_COLOUR_3DSHADOW:
+            if (!gs_objects.m_colBtnShadow.Ok())

             {
             {

-                g_systemBtnShadowColour = 
-                       new wxColour( 0x7530 >> SHIFT,
-                                     0x7530 >> SHIFT,
-                                             0x7530 >> SHIFT );
+                wxColour faceColour(GetColour(wxSYS_COLOUR_3DFACE));
+                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;
-        }
-        case wxSYS_COLOUR_BTNHIGHLIGHT:
-        {
-            if (!g_systemBtnHighlightColour)
+            color = gs_objects.m_colBtnShadow;
+            break;
+
+        case wxSYS_COLOUR_3DHIGHLIGHT:
+        //case wxSYS_COLOUR_BTNHIGHLIGHT:
+            color = *wxWHITE;
+            break;
+
+        case wxSYS_COLOUR_HIGHLIGHT:
+            if (!gs_objects.m_colHighlight.Ok())

             {
             {

-                g_systemBtnHighlightColour = 
-                       new wxColour( 0xea60 >> SHIFT,
-                                     0xea60 >> SHIFT,
-                                             0xea60 >> SHIFT );
+                gdkColor.red =
+                gdkColor.green = 0;
+                gdkColor.blue = 0x9c40;
+                GetColourFromGTKWidget(
+                    gdkColor, wxGTK_BUTTON, GTK_STATE_SELECTED);
+                gs_objects.m_colHighlight = wxColour(gdkColor);

             }
             }

-            return *g_systemBtnHighlightColour;
-        }
-        case wxSYS_COLOUR_HIGHLIGHT:
-        {
-            if (!g_systemHighlightColour)
+            color = gs_objects.m_colHighlight;
+            break;
+
+        case wxSYS_COLOUR_LISTBOX:
+            if (!gs_objects.m_colListBox.Ok())

             {
             {

-/*
-                g_systemHighlightColour = 
-                       new wxColour( 0      >> SHIFT,
-                                     0      >> SHIFT,
-                                             0x9c40 >> SHIFT );
-*/              
-                GtkWidget *widget = gtk_button_new();
-                GtkStyle *def = gtk_rc_get_style( widget );
-                int red = def->bg[GTK_STATE_SELECTED].red;
-                int green = def->bg[GTK_STATE_SELECTED].green;
-                int blue = def->bg[GTK_STATE_SELECTED].blue;
-                gtk_widget_destroy( widget );
-
-                g_systemHighlightColour = 
-                       new wxColour( red    >> SHIFT,
-                                     green  >> SHIFT,
-                                             blue   >> SHIFT );
+                if ( GetColourFromGTKWidget(gdkColor,
+                                            wxGTK_LIST,
+                                            GTK_STATE_NORMAL,
+                                            wxGTK_BASE) )
+                {
+                    gs_objects.m_colListBox = wxColour(gdkColor);
+                }
+                else
+                {
+                    gs_objects.m_colListBox = *wxWHITE;
+                }

             }
             }

-            return *g_systemHighlightColour;
-        }
-    case wxSYS_COLOUR_MENUTEXT:
-    case wxSYS_COLOUR_WINDOWTEXT:
-    case wxSYS_COLOUR_CAPTIONTEXT:
-    case wxSYS_COLOUR_INACTIVECAPTIONTEXT:
-    case wxSYS_COLOUR_BTNTEXT:
-    case wxSYS_COLOUR_INFOTEXT:
-    {
-      return *wxBLACK;
-    }
-    case wxSYS_COLOUR_HIGHLIGHTTEXT:
-    {
-      return *wxWHITE;
-    }
-    case wxSYS_COLOUR_INFOBK:
-    case wxSYS_COLOUR_APPWORKSPACE:
-    {
-      return *wxWHITE;    // ?
+            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:
+            if (!gs_objects.m_colBtnText.Ok())
+            {
+                gdkColor.red =
+                gdkColor.green =
+                gdkColor.blue = 0;
+                GetColourFromGTKWidget(
+                    gdkColor, wxGTK_BUTTON, GTK_STATE_NORMAL, wxGTK_FG);
+                gs_objects.m_colBtnText = wxColour(gdkColor);
+            }
+            color = gs_objects.m_colBtnText;
+            break;
+
+        case wxSYS_COLOUR_INFOBK:
+            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 (!gs_objects.m_colHighlightText.Ok())
+            {
+                wxColour hclr = GetColour(wxSYS_COLOUR_HIGHLIGHT);
+                if (hclr.Red() > 200 && hclr.Green() > 200 && hclr.Blue() > 200)
+                    gs_objects.m_colHighlightText = *wxBLACK;
+                else
+                    gs_objects.m_colHighlightText = *wxWHITE;
+            }
+            color = gs_objects.m_colHighlightText;
+            break;
+
+        case wxSYS_COLOUR_APPWORKSPACE:
+            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:
+            // TODO
+            color = *wxBLACK;
+            break;
+
+        case wxSYS_COLOUR_MAX:
+        default:
+            wxFAIL_MSG( _T("unknown system colour index") );
+            color = *wxWHITE;
+            break;

     }
     }

-  }
-  return *wxWHITE;
+
+    return color;

 }
 
 }
 

-wxFont wxSystemSettings::GetSystemFont( int index ) 
+wxFont wxSystemSettingsNative::GetFont( wxSystemFont index )

 {
 {

+    wxFont font;

     switch (index)
     {
         case wxSYS_OEM_FIXED_FONT:
         case wxSYS_ANSI_FIXED_FONT:
         case wxSYS_SYSTEM_FIXED_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:
         case wxSYS_ANSI_VAR_FONT:
         case wxSYS_SYSTEM_FONT:
         case wxSYS_DEVICE_DEFAULT_FONT:
         case wxSYS_DEFAULT_GUI_FONT:

+            if (!gs_objects.m_fontSystem.Ok())
+            {
+                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);
+            }
+            font = gs_objects.m_fontSystem;
+            break;
+
+        default:
+            break;
+    }
+    return font;
+}
+
+static bool GetFrameExtents(GdkWindow* window, int* left, int* right, int* top, int* bottom)
+{
+    bool success = false;
+    Atom property = 0;
+    if (gdk_x11_screen_supports_net_wm_hint(
+            gdk_drawable_get_screen(window),
+            gdk_atom_intern("_NET_FRAME_EXTENTS", false)))
+    {
+        success = true;
+        property = gdk_x11_get_xatom_by_name_for_display(
+            gdk_drawable_get_display(window),
+            "_NET_FRAME_EXTENTS");
+    }
+
+    if (success)
+    {
+        Atom type;
+        int format;
+        gulong nitems, bytes_after;
+        long* data = NULL;
+        success = XGetWindowProperty(
+            gdk_x11_drawable_get_xdisplay(window),
+            gdk_x11_drawable_get_xid(window),
+            property,
+            0, 4,
+            false,
+            XA_CARDINAL,
+            &type, &format, &nitems, &bytes_after, (guchar**)&data
+            ) == Success;
+        if (success)

         {
         {

-            if (!g_systemFont)
-                g_systemFont = new wxFont( 16, wxSWISS, wxNORMAL, wxNORMAL );
-            return *g_systemFont;
+            success = data && nitems == 4;
+            if (success)
+            {
+                if (left)   *left   = int(data[0]);
+                if (right)  *right  = int(data[1]);
+                if (top)    *top    = int(data[2]);
+                if (bottom) *bottom = int(data[3]);
+            }
+            if (data)
+                XFree(data);

         }
     }
         }
     }

+    return success;
+}
+
+// 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, wxWindow* win )
+{
+    GdkWindow *window = NULL;
+    if(win && GTK_WIDGET_REALIZED(win->GetHandle()))
+        window = win->GetHandle()->window;
+
+    switch (index)
+    {
+        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 (GetFrameExtents(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);

 
 

-    return wxNullFont;
+            // 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 (GetFrameExtents(window, NULL, NULL, &top, NULL))
+                {
+                    return top; // top frame extent
+                }
+            }
+
+            // Try a default approach without a window pointer, if possible
+            // ...
+
+            return -1;
+
+        case wxSYS_PENWINDOWS_PRESENT:
+            // No MS Windows for Pen computing extension available in X11 based gtk+.
+            return 0;
+
+        default:
+            return -1;   // metric is unknown
+    }

 }
 
 }
 

-int wxSystemSettings::GetSystemMetric( int index )
+bool wxSystemSettingsNative::HasFeature(wxSystemFeature index)

 {
     switch (index)
     {
 {
     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_CAN_ICONIZE_FRAME:
+            return false;
+
+        case wxSYS_CAN_DRAW_FRAME_DECORATIONS:
+            return true;
+
+        default:
+            return false;

     }
     }

-    
-    wxCHECK_MSG( index, 0, wxT("wxSystemSettings::GetSystemMetric not fully implemented") );
-    
-    return 0;

 }
 }