src/gtk/settings.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        gtk/settings.cpp
// Purpose:
// Author:      Robert Roebling
// Id:          $Id$
// Copyright:   (c) 1998 Robert Roebling
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////


#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#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/cmndata.h"
#include "wx/fontutil.h"

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

#define SHIFT (8*(sizeof(short int)-sizeof(char)))

// ----------------------------------------------------------------------------
// wxSystemObjects
// ----------------------------------------------------------------------------

struct wxSystemObjects
{
    wxColour m_colBtnFace,
             m_colBtnShadow,
             m_colBtnHighlight,
             m_colHighlight,
             m_colHighlightText,
             m_colListBox,
             m_colBtnText;

    wxFont m_fontSystem;
};

static wxSystemObjects gs_objects;

// ----------------------------------------------------------------------------
// wxSystemSettings implementation
// ----------------------------------------------------------------------------

// kind of widget to use in GetColourFromGTKWidget
enum wxGtkWidgetType
{
    wxGTK_BUTTON,
    wxGTK_LIST
};

// the colour we need
enum wxGtkColourType
{
    wxGTK_FG,
    wxGTK_BG,
    wxGTK_BASE
};

// 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,
                                   wxGtkWidgetType type = wxGTK_BUTTON,
                                   GtkStateType state = GTK_STATE_NORMAL,
                                   wxGtkColourType colour = wxGTK_BG)
{
    GtkWidget *widget;
    switch ( type )
    {
        default:
            wxFAIL_MSG( _T("unexpected GTK widget type") );
            // fall through

        case wxGTK_BUTTON:
            widget = gtk_button_new();
            break;

        case wxGTK_LIST:
            widget = gtk_list_new();
    }

    GtkStyle *def = gtk_rc_get_style( widget );
    if ( !def )
        def = gtk_widget_get_default_style();

    bool ok;
    if ( def )
    {
        GdkColor *col;
        switch ( colour )
        {
            default:
                wxFAIL_MSG( _T("unexpected GTK colour type") );
                // fall through

            case wxGTK_FG:
                col = def->fg;
                break;

            case wxGTK_BG:
                col = def->bg;
                break;

            case wxGTK_BASE:
                col = def->base;
                break;
        }

        red = col[state].red;
        green = col[state].green;
        blue = col[state].blue;

        ok = TRUE;
    }
    else
    {
        ok = FALSE;
    }

    gtk_widget_destroy( widget );

    return ok;
}

wxColour wxSystemSettingsNative::GetColour( wxSystemColour index )
{
    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 (!gs_objects.m_colBtnFace.Ok())
            {
                int red, green, blue;
                if ( !GetColourFromGTKWidget(red, green, blue) )
                {
                    red =
                    green = 0;
                    blue = 0x9c40;
                }

                gs_objects.m_colBtnFace = wxColour( red   >> SHIFT,
                                                   green >> SHIFT,
                                                   blue  >> SHIFT );
            }
            return gs_objects.m_colBtnFace;

        case wxSYS_COLOUR_WINDOW:
            return *wxWHITE;

        case wxSYS_COLOUR_3DDKSHADOW:
            return *wxBLACK;

        case wxSYS_COLOUR_GRAYTEXT:
        case wxSYS_COLOUR_BTNSHADOW:
        //case wxSYS_COLOUR_3DSHADOW:
            if (!gs_objects.m_colBtnShadow.Ok())
            {
                wxColour faceColour(GetColour(wxSYS_COLOUR_3DFACE));
                gs_objects.m_colBtnShadow =
                   wxColour((unsigned char) (faceColour.Red() * 0.666),
                            (unsigned char) (faceColour.Green() * 0.666),
                            (unsigned char) (faceColour.Blue() * 0.666));
            }

            return gs_objects.m_colBtnShadow;

        case wxSYS_COLOUR_3DHIGHLIGHT:
        //case wxSYS_COLOUR_BTNHIGHLIGHT:
            return * wxWHITE;

        case wxSYS_COLOUR_HIGHLIGHT:
            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;
                }

                gs_objects.m_colHighlight = wxColour( red   >> SHIFT,
                                                        green >> SHIFT,
                                                        blue  >> SHIFT );
            }
            return gs_objects.m_colHighlight;

        case wxSYS_COLOUR_LISTBOX:
            if (!gs_objects.m_colListBox.Ok())
            {
                int red, green, blue;
                if ( GetColourFromGTKWidget(red, green, blue,
                                            wxGTK_LIST,
                                            GTK_STATE_NORMAL,
                                            wxGTK_BASE) )
                {
                    gs_objects.m_colListBox = wxColour( red   >> SHIFT,
                                                          green >> SHIFT,
                                                          blue  >> SHIFT );
                }
                else
                {
                    gs_objects.m_colListBox = wxColour(*wxWHITE);
                }
            }
            return gs_objects.m_colListBox;

        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 (!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;
                }

                gs_objects.m_colBtnText = wxColour( red   >> SHIFT,
                                                      green >> SHIFT,
                                                      blue  >> SHIFT );
            }
            return gs_objects.m_colBtnText;

            // 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);

        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 = wxColour(*wxBLACK);
                else
                    gs_objects.m_colHighlightText = wxColour(*wxWHITE);
            }
            return gs_objects.m_colHighlightText;

        case wxSYS_COLOUR_APPWORKSPACE:
            return *wxWHITE;    // ?

        case wxSYS_COLOUR_HOTLIGHT:
        case wxSYS_COLOUR_GRADIENTACTIVECAPTION:
        case wxSYS_COLOUR_GRADIENTINACTIVECAPTION:
        case wxSYS_COLOUR_MENUHILIGHT:
            // TODO
            return *wxBLACK;

        case wxSYS_COLOUR_MAX:
        default:
            wxFAIL_MSG( _T("unknown system colour index") );
  }

  return *wxWHITE;
}

wxFont wxSystemSettingsNative::GetFont( wxSystemFont index )
{
    switch (index)
    {
        case wxSYS_OEM_FIXED_FONT:
        case wxSYS_ANSI_FIXED_FONT:
        case wxSYS_SYSTEM_FIXED_FONT:
        {
            return *wxNORMAL_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())
            {
#ifdef __WXGTK20__
                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_widget_destroy( widget );
#else
                gs_objects.m_fontSystem = wxFont( 12, wxSWISS, wxNORMAL, wxNORMAL );
#endif
            }
            return gs_objects.m_fontSystem;
        }

        default:
            return wxNullFont;
    }
}

int wxSystemSettingsNative::GetMetric( wxSystemMetric 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;

#if defined(__WXGTK20__) && GTK_CHECK_VERSION(2, 4, 0)
        case wxSYS_DCLICK_X:
        case wxSYS_DCLICK_Y:
            gint dclick_distance;
            g_object_get(gtk_settings_get_default(), "gtk-double-click-distance", &dclick_distance, NULL);
            return dclick_distance * 2;
#endif

#if defined(__WXGTK20__)
        case wxSYS_DRAG_X:
        case wxSYS_DRAG_Y:
            gint drag_threshold;
            g_object_get(gtk_settings_get_default(), "gtk-dnd-drag-threshold", &drag_threshold, NULL);
            return drag_threshold * 2;
#endif

        // VZ: is there any way to get the cursor size with GDK?
        // Mart Raudsepp: Yes, there is a way to get the default cursor size for a display ever since GDK 2.4
#if defined(__WXGTK20__) && GTK_CHECK_VERSION(2, 4, 0)
        case wxSYS_CURSOR_X:
        case wxSYS_CURSOR_Y:
            return gdk_display_get_default_cursor_size(gdk_display_get_default());
#else
        case wxSYS_CURSOR_X:   return 16;
        case wxSYS_CURSOR_Y:   return 16;
#endif
        // MBN: ditto for icons
        case wxSYS_ICON_X:     return 32;
        case wxSYS_ICON_Y:     return 32;
        default:
            wxFAIL_MSG( wxT("wxSystemSettings::GetMetric not fully implemented") );
            return 0;
    }
}

bool wxSystemSettingsNative::HasFeature(wxSystemFeature index)
{
    switch (index)
    {
        case wxSYS_CAN_ICONIZE_FRAME:
            return FALSE;
            break;
        case wxSYS_CAN_DRAW_FRAME_DECORATIONS:
            return TRUE;
            break;
        default:
            return FALSE;
    }
}
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: gtk/settings.cpp
	3	// Purpose:
	4	// Author: Robert Roebling
	5	// Id: $Id$
	6	// Copyright: (c) 1998 Robert Roebling
	7	// Licence: wxWindows licence
	8	/////////////////////////////////////////////////////////////////////////////
	9
	10
	11	#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
	12	#pragma implementation "settings.h"
	13	#endif
	14
	15	// For compilers that support precompilation, includes "wx.h".
	16	#include "wx/wxprec.h"
	17
	18	#include "wx/settings.h"
	19	#include "wx/debug.h"
	20	#include "wx/cmndata.h"
	21	#include "wx/fontutil.h"
	22
	23	#include <gdk/gdk.h>
	24	#include <gdk/gdkprivate.h>
	25	#include <gtk/gtk.h>
	26
	27	#define SHIFT (8*(sizeof(short int)-sizeof(char)))
	28
	29	// ----------------------------------------------------------------------------
	30	// wxSystemObjects
	31	// ----------------------------------------------------------------------------
	32
	33	struct wxSystemObjects
	34	{
	35	wxColour m_colBtnFace,
	36	m_colBtnShadow,
	37	m_colBtnHighlight,
	38	m_colHighlight,
	39	m_colHighlightText,
	40	m_colListBox,
	41	m_colBtnText;
	42
	43	wxFont m_fontSystem;
	44	};
	45
	46	static wxSystemObjects gs_objects;
	47
	48	// ----------------------------------------------------------------------------
	49	// wxSystemSettings implementation
	50	// ----------------------------------------------------------------------------
	51
	52	// kind of widget to use in GetColourFromGTKWidget
	53	enum wxGtkWidgetType
	54	{
	55	wxGTK_BUTTON,
	56	wxGTK_LIST
	57	};
	58
	59	// the colour we need
	60	enum wxGtkColourType
	61	{
	62	wxGTK_FG,
	63	wxGTK_BG,
	64	wxGTK_BASE
	65	};
	66
	67	// wxSystemSettings::GetColour() helper: get the colours from a GTK+
	68	// widget style, return true if we did get them, false to use defaults
	69	static bool GetColourFromGTKWidget(int& red, int& green, int& blue,
	70	wxGtkWidgetType type = wxGTK_BUTTON,
	71	GtkStateType state = GTK_STATE_NORMAL,
	72	wxGtkColourType colour = wxGTK_BG)
	73	{
	74	GtkWidget *widget;
	75	switch ( type )
	76	{
	77	default:
	78	wxFAIL_MSG( _T("unexpected GTK widget type") );
	79	// fall through
	80
	81	case wxGTK_BUTTON:
	82	widget = gtk_button_new();
	83	break;
	84
	85	case wxGTK_LIST:
	86	widget = gtk_list_new();
	87	}
	88
	89	GtkStyle *def = gtk_rc_get_style( widget );
	90	if ( !def )
	91	def = gtk_widget_get_default_style();
	92
	93	bool ok;
	94	if ( def )
	95	{
	96	GdkColor *col;
	97	switch ( colour )
	98	{
	99	default:
	100	wxFAIL_MSG( _T("unexpected GTK colour type") );
	101	// fall through
	102
	103	case wxGTK_FG:
	104	col = def->fg;
	105	break;
	106
	107	case wxGTK_BG:
	108	col = def->bg;
	109	break;
	110
	111	case wxGTK_BASE:
	112	col = def->base;
	113	break;
	114	}
	115
	116	red = col[state].red;
	117	green = col[state].green;
	118	blue = col[state].blue;
	119
	120	ok = TRUE;
	121	}
	122	else
	123	{
	124	ok = FALSE;
	125	}
	126
	127	gtk_widget_destroy( widget );
	128
	129	return ok;
	130	}
	131
	132	wxColour wxSystemSettingsNative::GetColour( wxSystemColour index )
	133	{
	134	switch (index)
	135	{
	136	case wxSYS_COLOUR_SCROLLBAR:
	137	case wxSYS_COLOUR_BACKGROUND:
	138	case wxSYS_COLOUR_ACTIVECAPTION:
	139	case wxSYS_COLOUR_INACTIVECAPTION:
	140	case wxSYS_COLOUR_MENU:
	141	case wxSYS_COLOUR_WINDOWFRAME:
	142	case wxSYS_COLOUR_ACTIVEBORDER:
	143	case wxSYS_COLOUR_INACTIVEBORDER:
	144	case wxSYS_COLOUR_BTNFACE:
	145	case wxSYS_COLOUR_MENUBAR:
	146	case wxSYS_COLOUR_3DLIGHT:
	147	if (!gs_objects.m_colBtnFace.Ok())
	148	{
	149	int red, green, blue;
	150	if ( !GetColourFromGTKWidget(red, green, blue) )
	151	{
	152	red =
	153	green = 0;
	154	blue = 0x9c40;
	155	}
	156
	157	gs_objects.m_colBtnFace = wxColour( red >> SHIFT,
	158	green >> SHIFT,
	159	blue >> SHIFT );
	160	}
	161	return gs_objects.m_colBtnFace;
	162
	163	case wxSYS_COLOUR_WINDOW:
	164	return *wxWHITE;
	165
	166	case wxSYS_COLOUR_3DDKSHADOW:
	167	return *wxBLACK;
	168
	169	case wxSYS_COLOUR_GRAYTEXT:
	170	case wxSYS_COLOUR_BTNSHADOW:
	171	//case wxSYS_COLOUR_3DSHADOW:
	172	if (!gs_objects.m_colBtnShadow.Ok())
	173	{
	174	wxColour faceColour(GetColour(wxSYS_COLOUR_3DFACE));
	175	gs_objects.m_colBtnShadow =
	176	wxColour((unsigned char) (faceColour.Red() * 0.666),
	177	(unsigned char) (faceColour.Green() * 0.666),
	178	(unsigned char) (faceColour.Blue() * 0.666));
	179	}
	180
	181	return gs_objects.m_colBtnShadow;
	182
	183	case wxSYS_COLOUR_3DHIGHLIGHT:
	184	//case wxSYS_COLOUR_BTNHIGHLIGHT:
	185	return * wxWHITE;
	186
	187	case wxSYS_COLOUR_HIGHLIGHT:
	188	if (!gs_objects.m_colHighlight.Ok())
	189	{
	190	int red, green, blue;
	191	if ( !GetColourFromGTKWidget(red, green, blue,
	192	wxGTK_BUTTON,
	193	GTK_STATE_SELECTED) )
	194	{
	195	red =
	196	green = 0;
	197	blue = 0x9c40;
	198	}
	199
	200	gs_objects.m_colHighlight = wxColour( red >> SHIFT,
	201	green >> SHIFT,
	202	blue >> SHIFT );
	203	}
	204	return gs_objects.m_colHighlight;
	205
	206	case wxSYS_COLOUR_LISTBOX:
	207	if (!gs_objects.m_colListBox.Ok())
	208	{
	209	int red, green, blue;
	210	if ( GetColourFromGTKWidget(red, green, blue,
	211	wxGTK_LIST,
	212	GTK_STATE_NORMAL,
	213	wxGTK_BASE) )
	214	{
	215	gs_objects.m_colListBox = wxColour( red >> SHIFT,
	216	green >> SHIFT,
	217	blue >> SHIFT );
	218	}
	219	else
	220	{
	221	gs_objects.m_colListBox = wxColour(*wxWHITE);
	222	}
	223	}
	224	return gs_objects.m_colListBox;
	225
	226	case wxSYS_COLOUR_MENUTEXT:
	227	case wxSYS_COLOUR_WINDOWTEXT:
	228	case wxSYS_COLOUR_CAPTIONTEXT:
	229	case wxSYS_COLOUR_INACTIVECAPTIONTEXT:
	230	case wxSYS_COLOUR_BTNTEXT:
	231	case wxSYS_COLOUR_INFOTEXT:
	232	if (!gs_objects.m_colBtnText.Ok())
	233	{
	234	int red, green, blue;
	235	if ( !GetColourFromGTKWidget(red, green, blue,
	236	wxGTK_BUTTON,
	237	GTK_STATE_NORMAL,
	238	wxGTK_FG) )
	239	{
	240	red =
	241	green =
	242	blue = 0;
	243	}
	244
	245	gs_objects.m_colBtnText = wxColour( red >> SHIFT,
	246	green >> SHIFT,
	247	blue >> SHIFT );
	248	}
	249	return gs_objects.m_colBtnText;
	250
	251	// this (as well as wxSYS_COLOUR_INFOTEXT above) is used for
	252	// tooltip windows - Robert, please change this code to use the
	253	// real GTK tooltips when/if you can (TODO)
	254	case wxSYS_COLOUR_INFOBK:
	255	return wxColour(255, 255, 225);
	256
	257	case wxSYS_COLOUR_HIGHLIGHTTEXT:
	258	if (!gs_objects.m_colHighlightText.Ok())
	259	{
	260	wxColour hclr = GetColour(wxSYS_COLOUR_HIGHLIGHT);
	261	if (hclr.Red() > 200 && hclr.Green() > 200 && hclr.Blue() > 200)
	262	gs_objects.m_colHighlightText = wxColour(*wxBLACK);
	263	else
	264	gs_objects.m_colHighlightText = wxColour(*wxWHITE);
	265	}
	266	return gs_objects.m_colHighlightText;
	267
	268	case wxSYS_COLOUR_APPWORKSPACE:
	269	return *wxWHITE; // ?
	270
	271	case wxSYS_COLOUR_HOTLIGHT:
	272	case wxSYS_COLOUR_GRADIENTACTIVECAPTION:
	273	case wxSYS_COLOUR_GRADIENTINACTIVECAPTION:
	274	case wxSYS_COLOUR_MENUHILIGHT:
	275	// TODO
	276	return *wxBLACK;
	277
	278	case wxSYS_COLOUR_MAX:
	279	default:
	280	wxFAIL_MSG( _T("unknown system colour index") );
	281	}
	282
	283	return *wxWHITE;
	284	}
	285
	286	wxFont wxSystemSettingsNative::GetFont( wxSystemFont index )
	287	{
	288	switch (index)
	289	{
	290	case wxSYS_OEM_FIXED_FONT:
	291	case wxSYS_ANSI_FIXED_FONT:
	292	case wxSYS_SYSTEM_FIXED_FONT:
	293	{
	294	return *wxNORMAL_FONT;
	295	}
	296	case wxSYS_ANSI_VAR_FONT:
	297	case wxSYS_SYSTEM_FONT:
	298	case wxSYS_DEVICE_DEFAULT_FONT:
	299	case wxSYS_DEFAULT_GUI_FONT:
	300	{
	301	if (!gs_objects.m_fontSystem.Ok())
	302	{
	303	#ifdef __WXGTK20__
	304	GtkWidget *widget = gtk_button_new();
	305	GtkStyle *def = gtk_rc_get_style( widget );
	306	if ( !def \|\| !def->font_desc )
	307	def = gtk_widget_get_default_style();
	308	if ( def && def->font_desc )
	309	{
	310	wxNativeFontInfo info;
	311	info.description =
	312	pango_font_description_copy(def->font_desc);
	313	gs_objects.m_fontSystem = wxFont(info);
	314	}
	315	else
	316	{
	317	GtkSettings *settings = gtk_settings_get_default();
	318	gchar *font_name = NULL;
	319	g_object_get ( settings,
	320	"gtk-font-name",
	321	&font_name,
	322	NULL);
	323	if (!font_name)
	324	gs_objects.m_fontSystem = wxFont( 12, wxSWISS, wxNORMAL, wxNORMAL );
	325	else
	326	gs_objects.m_fontSystem = wxFont(wxString::FromAscii(font_name));
	327	g_free (font_name);
	328	}
	329	gtk_widget_destroy( widget );
	330	#else
	331	gs_objects.m_fontSystem = wxFont( 12, wxSWISS, wxNORMAL, wxNORMAL );
	332	#endif
	333	}
	334	return gs_objects.m_fontSystem;
	335	}
	336
	337	default:
	338	return wxNullFont;
	339	}
	340	}
	341
	342	int wxSystemSettingsNative::GetMetric( wxSystemMetric index )
	343	{
	344	switch (index)
	345	{
	346	case wxSYS_SCREEN_X: return gdk_screen_width();
	347	case wxSYS_SCREEN_Y: return gdk_screen_height();
	348	case wxSYS_HSCROLL_Y: return 15;
	349	case wxSYS_VSCROLL_X: return 15;
	350
	351	#if defined(__WXGTK20__) && GTK_CHECK_VERSION(2, 4, 0)
	352	case wxSYS_DCLICK_X:
	353	case wxSYS_DCLICK_Y:
	354	gint dclick_distance;
	355	g_object_get(gtk_settings_get_default(), "gtk-double-click-distance", &dclick_distance, NULL);
	356	return dclick_distance * 2;
	357	#endif
	358
	359	#if defined(__WXGTK20__)
	360	case wxSYS_DRAG_X:
	361	case wxSYS_DRAG_Y:
	362	gint drag_threshold;
	363	g_object_get(gtk_settings_get_default(), "gtk-dnd-drag-threshold", &drag_threshold, NULL);
	364	return drag_threshold * 2;
	365	#endif
	366
	367	// VZ: is there any way to get the cursor size with GDK?
	368	// Mart Raudsepp: Yes, there is a way to get the default cursor size for a display ever since GDK 2.4
	369	#if defined(__WXGTK20__) && GTK_CHECK_VERSION(2, 4, 0)
	370	case wxSYS_CURSOR_X:
	371	case wxSYS_CURSOR_Y:
	372	return gdk_display_get_default_cursor_size(gdk_display_get_default());
	373	#else
	374	case wxSYS_CURSOR_X: return 16;
	375	case wxSYS_CURSOR_Y: return 16;
	376	#endif
	377	// MBN: ditto for icons
	378	case wxSYS_ICON_X: return 32;
	379	case wxSYS_ICON_Y: return 32;
	380	default:
	381	wxFAIL_MSG( wxT("wxSystemSettings::GetMetric not fully implemented") );
	382	return 0;
	383	}
	384	}
	385
	386	bool wxSystemSettingsNative::HasFeature(wxSystemFeature index)
	387	{
	388	switch (index)
	389	{
	390	case wxSYS_CAN_ICONIZE_FRAME:
	391	return FALSE;
	392	break;
	393	case wxSYS_CAN_DRAW_FRAME_DECORATIONS:
	394	return TRUE;
	395	break;
	396	default:
	397	return FALSE;
	398	}
	399	}