src/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
/////////////////////////////////////////////////////////////////////////////

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

#include "wx/settings.h"

#ifndef WX_PRECOMP
    #include "wx/toplevel.h"
#endif

#include "wx/fontutil.h"
#include "wx/fontenum.h"

#include <gtk/gtk.h>
#include "wx/gtk/private/win_gtk.h"

bool wxGetFrameExtents(GdkWindow* window, int* left, int* right, int* top, int* bottom);

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

static wxFont gs_fontSystem;

static GtkContainer* ContainerWidget()
{
    static GtkContainer* s_widget;
    if (s_widget == NULL)
    {
        s_widget = GTK_CONTAINER(gtk_fixed_new());
        GtkWidget* window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
        gtk_container_add(GTK_CONTAINER(window), GTK_WIDGET(s_widget));
    }
    return s_widget;
}

extern "C" {
static void style_set(GtkWidget*, GtkStyle*, void*)
{
    gs_fontSystem = wxNullFont;
}
}

static const GtkStyle* ButtonStyle()
{
    static GtkWidget* s_widget;
    if (s_widget == NULL)
    {
        s_widget = gtk_button_new();
        gtk_container_add(ContainerWidget(), s_widget);
        gtk_widget_ensure_style(s_widget);
        g_signal_connect(s_widget, "style_set", G_CALLBACK(style_set), NULL);
    }
    return s_widget->style;
}

static const GtkStyle* ListStyle()
{
    static GtkWidget* s_widget;
    if (s_widget == NULL)
    {
        s_widget = gtk_tree_view_new_with_model(
            GTK_TREE_MODEL(gtk_list_store_new(1, G_TYPE_INT)));
        gtk_container_add(ContainerWidget(), s_widget);
        gtk_widget_ensure_style(s_widget);
    }
    return s_widget->style;
}

static const GtkStyle* TextCtrlStyle()
{
    static GtkWidget* s_widget;
    if (s_widget == NULL)
    {
        s_widget = gtk_text_view_new();
        gtk_container_add(ContainerWidget(), s_widget);
        gtk_widget_ensure_style(s_widget);
    }
    return s_widget->style;
}

static const GtkStyle* MenuItemStyle()
{
    static GtkWidget* s_widget;
    if (s_widget == NULL)
    {
        s_widget = gtk_menu_item_new();
        gtk_container_add(ContainerWidget(), s_widget);
        gtk_widget_ensure_style(s_widget);
    }
    return s_widget->style;
}

static const GtkStyle* MenuBarStyle()
{
    static GtkWidget* s_widget;
    if (s_widget == NULL)
    {
        s_widget = gtk_menu_bar_new();
        gtk_container_add(ContainerWidget(), s_widget);
        gtk_widget_ensure_style(s_widget);
    }
    return s_widget->style;
}

static const GtkStyle* ToolTipStyle()
{
    static GtkWidget* s_widget;
    if (s_widget == NULL)
    {
        s_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(s_widget, name);
        gtk_widget_ensure_style(s_widget);
    }
    return s_widget->style;
}

wxColour wxSystemSettingsNative::GetColour( wxSystemColour index )
{
    wxColor color;
    switch (index)
    {
        case wxSYS_COLOUR_SCROLLBAR:
        case wxSYS_COLOUR_BACKGROUND:
        //case wxSYS_COLOUR_DESKTOP:
        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_3DFACE:
        case wxSYS_COLOUR_3DLIGHT:
            color = wxColor(ButtonStyle()->bg[GTK_STATE_NORMAL]);
            break;

        case wxSYS_COLOUR_WINDOW:
            color = wxColor(TextCtrlStyle()->base[GTK_STATE_NORMAL]);
            break;

        case wxSYS_COLOUR_MENUBAR:
            color = wxColor(MenuBarStyle()->bg[GTK_STATE_NORMAL]);
            break;

        case wxSYS_COLOUR_3DDKSHADOW:
            color = *wxBLACK;
            break;

        case wxSYS_COLOUR_GRAYTEXT:
        case wxSYS_COLOUR_BTNSHADOW:
        //case wxSYS_COLOUR_3DSHADOW:
            {
                wxColour faceColour(GetColour(wxSYS_COLOUR_3DFACE));
                color =
                   wxColour((unsigned char) (faceColour.Red() * 2 / 3),
                            (unsigned char) (faceColour.Green() * 2 / 3),
                            (unsigned char) (faceColour.Blue() * 2 / 3));
            }
            break;

        case wxSYS_COLOUR_BTNHIGHLIGHT:
        //case wxSYS_COLOUR_BTNHILIGHT:
        //case wxSYS_COLOUR_3DHIGHLIGHT:
        //case wxSYS_COLOUR_3DHILIGHT:
            color = *wxWHITE;
            break;

        case wxSYS_COLOUR_HIGHLIGHT:
            color = wxColor(ButtonStyle()->bg[GTK_STATE_SELECTED]);
            break;

        case wxSYS_COLOUR_LISTBOX:
            color = wxColor(ListStyle()->base[GTK_STATE_NORMAL]);
            break;

        case wxSYS_COLOUR_LISTBOXTEXT:
            color = wxColor(ListStyle()->text[GTK_STATE_NORMAL]);
            break;

        case wxSYS_COLOUR_LISTBOXHIGHLIGHTTEXT:
            // This is for the text in a list control (or tree) when the
            // item is selected, but not focused
            color = wxColor(ListStyle()->text[GTK_STATE_ACTIVE]);
            break;

        case wxSYS_COLOUR_MENUTEXT:
        case wxSYS_COLOUR_WINDOWTEXT:
        case wxSYS_COLOUR_CAPTIONTEXT:
        case wxSYS_COLOUR_INACTIVECAPTIONTEXT:
        case wxSYS_COLOUR_BTNTEXT:
            color = wxColor(ButtonStyle()->fg[GTK_STATE_NORMAL]);
            break;

        case wxSYS_COLOUR_INFOBK:
            color = wxColor(ToolTipStyle()->bg[GTK_STATE_NORMAL]);
            break;

        case wxSYS_COLOUR_INFOTEXT:
            color = wxColor(ToolTipStyle()->fg[GTK_STATE_NORMAL]);
            break;

        case wxSYS_COLOUR_HIGHLIGHTTEXT:
            color = wxColor(ButtonStyle()->fg[GTK_STATE_SELECTED]);
            break;

        case wxSYS_COLOUR_APPWORKSPACE:
            color = *wxWHITE;    // ?
            break;

        case wxSYS_COLOUR_ACTIVECAPTION:
        case wxSYS_COLOUR_MENUHILIGHT:
            color = wxColor(MenuItemStyle()->bg[GTK_STATE_SELECTED]);
            break;

        case wxSYS_COLOUR_HOTLIGHT:
        case wxSYS_COLOUR_GRADIENTACTIVECAPTION:
        case wxSYS_COLOUR_GRADIENTINACTIVECAPTION:
            // TODO
            color = *wxBLACK;
            break;

        case wxSYS_COLOUR_MAX:
        default:
            wxFAIL_MSG( wxT("unknown system colour index") );
            color = *wxWHITE;
            break;
    }

    wxASSERT(color.IsOk());
    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:
            font = *wxNORMAL_FONT;
            break;

        case wxSYS_ANSI_VAR_FONT:
        case wxSYS_SYSTEM_FONT:
        case wxSYS_DEVICE_DEFAULT_FONT:
        case wxSYS_DEFAULT_GUI_FONT:
            if (!gs_fontSystem.Ok())
            {
                wxNativeFontInfo info;
                info.description = ButtonStyle()->font_desc;
                gs_fontSystem = wxFont(info);

#if wxUSE_FONTENUM
                // (try to) heal the default font (on some common systems e.g. Ubuntu
                // it's "Sans Serif" but the real font is called "Sans"):
                if (!wxFontEnumerator::IsValidFacename(gs_fontSystem.GetFaceName()) &&
                    gs_fontSystem.GetFaceName() == "Sans Serif")
                    gs_fontSystem.SetFaceName("Sans");
#endif // wxUSE_FONTENUM

                info.description = NULL;
            }
            font = gs_fontSystem;
            break;

        default:
            break;
    }

    wxASSERT( font.IsOk() );

    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();
}

static int GetBorderWidth(wxSystemMetric index, wxWindow* win)
{
    if (win->m_wxwindow)
    {
        wxPizza* pizza = WX_PIZZA(win->m_wxwindow);
        int x, y;
        pizza->get_border_widths(x, y);
        switch (index)
        {
            case wxSYS_BORDER_X:
            case wxSYS_EDGE_X:
            case wxSYS_FRAMESIZE_X:
                return x;
            default:
                return y;
        }
    }
    return -1;
}

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 (win)
            {
                wxTopLevelWindow *tlw = wxDynamicCast(win, wxTopLevelWindow);
                if (!tlw)
                    return GetBorderWidth(index, win);
                else if (window)
                {
                    // 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
            // ...

            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
    }
}

bool wxSystemSettingsNative::HasFeature(wxSystemFeature index)
{
    switch (index)
    {
        case wxSYS_CAN_ICONIZE_FRAME:
            return false;

        case wxSYS_CAN_DRAW_FRAME_DECORATIONS:
            return true;

        default:
            return false;
    }
}
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: src/gtk/settings.cpp
	3	// Purpose:
	4	// Author: Robert Roebling
	5	// Modified by: Mart Raudsepp (GetMetric)
	6	// Id: $Id$
	7	// Copyright: (c) 1998 Robert Roebling
	8	// Licence: wxWindows licence
	9	/////////////////////////////////////////////////////////////////////////////
	10
	11	// For compilers that support precompilation, includes "wx.h".
	12	#include "wx/wxprec.h"
	13
	14	#include "wx/settings.h"
	15
	16	#ifndef WX_PRECOMP
	17	#include "wx/toplevel.h"
	18	#endif
	19
	20	#include "wx/fontutil.h"
	21	#include "wx/fontenum.h"
	22
	23	#include <gtk/gtk.h>
	24	#include "wx/gtk/private/win_gtk.h"
	25
	26	bool wxGetFrameExtents(GdkWindow* window, int* left, int* right, int* top, int* bottom);
	27
	28	// ----------------------------------------------------------------------------
	29	// wxSystemSettings implementation
	30	// ----------------------------------------------------------------------------
	31
	32	static wxFont gs_fontSystem;
	33
	34	static GtkContainer* ContainerWidget()
	35	{
	36	static GtkContainer* s_widget;
	37	if (s_widget == NULL)
	38	{
	39	s_widget = GTK_CONTAINER(gtk_fixed_new());
	40	GtkWidget* window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
	41	gtk_container_add(GTK_CONTAINER(window), GTK_WIDGET(s_widget));
	42	}
	43	return s_widget;
	44	}
	45
	46	extern "C" {
	47	static void style_set(GtkWidget, GtkStyle, void*)
	48	{
	49	gs_fontSystem = wxNullFont;
	50	}
	51	}
	52
	53	static const GtkStyle* ButtonStyle()
	54	{
	55	static GtkWidget* s_widget;
	56	if (s_widget == NULL)
	57	{
	58	s_widget = gtk_button_new();
	59	gtk_container_add(ContainerWidget(), s_widget);
	60	gtk_widget_ensure_style(s_widget);
	61	g_signal_connect(s_widget, "style_set", G_CALLBACK(style_set), NULL);
	62	}
	63	return s_widget->style;
	64	}
	65
	66	static const GtkStyle* ListStyle()
	67	{
	68	static GtkWidget* s_widget;
	69	if (s_widget == NULL)
	70	{
	71	s_widget = gtk_tree_view_new_with_model(
	72	GTK_TREE_MODEL(gtk_list_store_new(1, G_TYPE_INT)));
	73	gtk_container_add(ContainerWidget(), s_widget);
	74	gtk_widget_ensure_style(s_widget);
	75	}
	76	return s_widget->style;
	77	}
	78
	79	static const GtkStyle* TextCtrlStyle()
	80	{
	81	static GtkWidget* s_widget;
	82	if (s_widget == NULL)
	83	{
	84	s_widget = gtk_text_view_new();
	85	gtk_container_add(ContainerWidget(), s_widget);
	86	gtk_widget_ensure_style(s_widget);
	87	}
	88	return s_widget->style;
	89	}
	90
	91	static const GtkStyle* MenuItemStyle()
	92	{
	93	static GtkWidget* s_widget;
	94	if (s_widget == NULL)
	95	{
	96	s_widget = gtk_menu_item_new();
	97	gtk_container_add(ContainerWidget(), s_widget);
	98	gtk_widget_ensure_style(s_widget);
	99	}
	100	return s_widget->style;
	101	}
	102
	103	static const GtkStyle* MenuBarStyle()
	104	{
	105	static GtkWidget* s_widget;
	106	if (s_widget == NULL)
	107	{
	108	s_widget = gtk_menu_bar_new();
	109	gtk_container_add(ContainerWidget(), s_widget);
	110	gtk_widget_ensure_style(s_widget);
	111	}
	112	return s_widget->style;
	113	}
	114
	115	static const GtkStyle* ToolTipStyle()
	116	{
	117	static GtkWidget* s_widget;
	118	if (s_widget == NULL)
	119	{
	120	s_widget = gtk_window_new(GTK_WINDOW_POPUP);
	121	const char* name = "gtk-tooltip";
	122	if (gtk_check_version(2, 11, 0))
	123	name = "gtk-tooltips";
	124	gtk_widget_set_name(s_widget, name);
	125	gtk_widget_ensure_style(s_widget);
	126	}
	127	return s_widget->style;
	128	}
	129
	130	wxColour wxSystemSettingsNative::GetColour( wxSystemColour index )
	131	{
	132	wxColor color;
	133	switch (index)
	134	{
	135	case wxSYS_COLOUR_SCROLLBAR:
	136	case wxSYS_COLOUR_BACKGROUND:
	137	//case wxSYS_COLOUR_DESKTOP:
	138	case wxSYS_COLOUR_INACTIVECAPTION:
	139	case wxSYS_COLOUR_MENU:
	140	case wxSYS_COLOUR_WINDOWFRAME:
	141	case wxSYS_COLOUR_ACTIVEBORDER:
	142	case wxSYS_COLOUR_INACTIVEBORDER:
	143	case wxSYS_COLOUR_BTNFACE:
	144	//case wxSYS_COLOUR_3DFACE:
	145	case wxSYS_COLOUR_3DLIGHT:
	146	color = wxColor(ButtonStyle()->bg[GTK_STATE_NORMAL]);
	147	break;
	148
	149	case wxSYS_COLOUR_WINDOW:
	150	color = wxColor(TextCtrlStyle()->base[GTK_STATE_NORMAL]);
	151	break;
	152
	153	case wxSYS_COLOUR_MENUBAR:
	154	color = wxColor(MenuBarStyle()->bg[GTK_STATE_NORMAL]);
	155	break;
	156
	157	case wxSYS_COLOUR_3DDKSHADOW:
	158	color = *wxBLACK;
	159	break;
	160
	161	case wxSYS_COLOUR_GRAYTEXT:
	162	case wxSYS_COLOUR_BTNSHADOW:
	163	//case wxSYS_COLOUR_3DSHADOW:
	164	{
	165	wxColour faceColour(GetColour(wxSYS_COLOUR_3DFACE));
	166	color =
	167	wxColour((unsigned char) (faceColour.Red() * 2 / 3),
	168	(unsigned char) (faceColour.Green() * 2 / 3),
	169	(unsigned char) (faceColour.Blue() * 2 / 3));
	170	}
	171	break;
	172
	173	case wxSYS_COLOUR_BTNHIGHLIGHT:
	174	//case wxSYS_COLOUR_BTNHILIGHT:
	175	//case wxSYS_COLOUR_3DHIGHLIGHT:
	176	//case wxSYS_COLOUR_3DHILIGHT:
	177	color = *wxWHITE;
	178	break;
	179
	180	case wxSYS_COLOUR_HIGHLIGHT:
	181	color = wxColor(ButtonStyle()->bg[GTK_STATE_SELECTED]);
	182	break;
	183
	184	case wxSYS_COLOUR_LISTBOX:
	185	color = wxColor(ListStyle()->base[GTK_STATE_NORMAL]);
	186	break;
	187
	188	case wxSYS_COLOUR_LISTBOXTEXT:
	189	color = wxColor(ListStyle()->text[GTK_STATE_NORMAL]);
	190	break;
	191
	192	case wxSYS_COLOUR_LISTBOXHIGHLIGHTTEXT:
	193	// This is for the text in a list control (or tree) when the
	194	// item is selected, but not focused
	195	color = wxColor(ListStyle()->text[GTK_STATE_ACTIVE]);
	196	break;
	197
	198	case wxSYS_COLOUR_MENUTEXT:
	199	case wxSYS_COLOUR_WINDOWTEXT:
	200	case wxSYS_COLOUR_CAPTIONTEXT:
	201	case wxSYS_COLOUR_INACTIVECAPTIONTEXT:
	202	case wxSYS_COLOUR_BTNTEXT:
	203	color = wxColor(ButtonStyle()->fg[GTK_STATE_NORMAL]);
	204	break;
	205
	206	case wxSYS_COLOUR_INFOBK:
	207	color = wxColor(ToolTipStyle()->bg[GTK_STATE_NORMAL]);
	208	break;
	209
	210	case wxSYS_COLOUR_INFOTEXT:
	211	color = wxColor(ToolTipStyle()->fg[GTK_STATE_NORMAL]);
	212	break;
	213
	214	case wxSYS_COLOUR_HIGHLIGHTTEXT:
	215	color = wxColor(ButtonStyle()->fg[GTK_STATE_SELECTED]);
	216	break;
	217
	218	case wxSYS_COLOUR_APPWORKSPACE:
	219	color = *wxWHITE; // ?
	220	break;
	221
	222	case wxSYS_COLOUR_ACTIVECAPTION:
	223	case wxSYS_COLOUR_MENUHILIGHT:
	224	color = wxColor(MenuItemStyle()->bg[GTK_STATE_SELECTED]);
	225	break;
	226
	227	case wxSYS_COLOUR_HOTLIGHT:
	228	case wxSYS_COLOUR_GRADIENTACTIVECAPTION:
	229	case wxSYS_COLOUR_GRADIENTINACTIVECAPTION:
	230	// TODO
	231	color = *wxBLACK;
	232	break;
	233
	234	case wxSYS_COLOUR_MAX:
	235	default:
	236	wxFAIL_MSG( wxT("unknown system colour index") );
	237	color = *wxWHITE;
	238	break;
	239	}
	240
	241	wxASSERT(color.IsOk());
	242	return color;
	243	}
	244
	245	wxFont wxSystemSettingsNative::GetFont( wxSystemFont index )
	246	{
	247	wxFont font;
	248	switch (index)
	249	{
	250	case wxSYS_OEM_FIXED_FONT:
	251	case wxSYS_ANSI_FIXED_FONT:
	252	case wxSYS_SYSTEM_FIXED_FONT:
	253	font = *wxNORMAL_FONT;
	254	break;
	255
	256	case wxSYS_ANSI_VAR_FONT:
	257	case wxSYS_SYSTEM_FONT:
	258	case wxSYS_DEVICE_DEFAULT_FONT:
	259	case wxSYS_DEFAULT_GUI_FONT:
	260	if (!gs_fontSystem.Ok())
	261	{
	262	wxNativeFontInfo info;
	263	info.description = ButtonStyle()->font_desc;
	264	gs_fontSystem = wxFont(info);
	265
	266	#if wxUSE_FONTENUM
	267	// (try to) heal the default font (on some common systems e.g. Ubuntu
	268	// it's "Sans Serif" but the real font is called "Sans"):
	269	if (!wxFontEnumerator::IsValidFacename(gs_fontSystem.GetFaceName()) &&
	270	gs_fontSystem.GetFaceName() == "Sans Serif")
	271	gs_fontSystem.SetFaceName("Sans");
	272	#endif // wxUSE_FONTENUM
	273
	274	info.description = NULL;
	275	}
	276	font = gs_fontSystem;
	277	break;
	278
	279	default:
	280	break;
	281	}
	282
	283	wxASSERT( font.IsOk() );
	284
	285	return font;
	286	}
	287
	288	// helper: return the GtkSettings either for the screen the current window is
	289	// on or for the default screen if window is NULL
	290	static GtkSettings GetSettingsForWindowScreen(GdkWindow window)
	291	{
	292	return window ? gtk_settings_get_for_screen(gdk_drawable_get_screen(window))
	293	: gtk_settings_get_default();
	294	}
	295
	296	static int GetBorderWidth(wxSystemMetric index, wxWindow* win)
	297	{
	298	if (win->m_wxwindow)
	299	{
	300	wxPizza* pizza = WX_PIZZA(win->m_wxwindow);
	301	int x, y;
	302	pizza->get_border_widths(x, y);
	303	switch (index)
	304	{
	305	case wxSYS_BORDER_X:
	306	case wxSYS_EDGE_X:
	307	case wxSYS_FRAMESIZE_X:
	308	return x;
	309	default:
	310	return y;
	311	}
	312	}
	313	return -1;
	314	}
	315
	316	int wxSystemSettingsNative::GetMetric( wxSystemMetric index, wxWindow* win )
	317	{
	318	GdkWindow *window = NULL;
	319	if(win && GTK_WIDGET_REALIZED(win->GetHandle()))
	320	window = win->GetHandle()->window;
	321
	322	switch (index)
	323	{
	324	case wxSYS_BORDER_X:
	325	case wxSYS_BORDER_Y:
	326	case wxSYS_EDGE_X:
	327	case wxSYS_EDGE_Y:
	328	case wxSYS_FRAMESIZE_X:
	329	case wxSYS_FRAMESIZE_Y:
	330	if (win)
	331	{
	332	wxTopLevelWindow *tlw = wxDynamicCast(win, wxTopLevelWindow);
	333	if (!tlw)
	334	return GetBorderWidth(index, win);
	335	else if (window)
	336	{
	337	// Get the frame extents from the windowmanager.
	338	// In most cases the top extent is the titlebar, so we use the bottom extent
	339	// for the heights.
	340	int right, bottom;
	341	if (wxGetFrameExtents(window, NULL, &right, NULL, &bottom))
	342	{
	343	switch (index)
	344	{
	345	case wxSYS_BORDER_X:
	346	case wxSYS_EDGE_X:
	347	case wxSYS_FRAMESIZE_X:
	348	return right; // width of right extent
	349	default:
	350	return bottom; // height of bottom extent
	351	}
	352	}
	353	}
	354	}
	355
	356	return -1; // no window specified
	357
	358	case wxSYS_CURSOR_X:
	359	case wxSYS_CURSOR_Y:
	360	return gdk_display_get_default_cursor_size(
	361	window ? gdk_drawable_get_display(window)
	362	: gdk_display_get_default());
	363
	364	case wxSYS_DCLICK_X:
	365	case wxSYS_DCLICK_Y:
	366	gint dclick_distance;
	367	g_object_get(GetSettingsForWindowScreen(window),
	368	"gtk-double-click-distance", &dclick_distance, NULL);
	369
	370	return dclick_distance * 2;
	371
	372	case wxSYS_DCLICK_MSEC:
	373	gint dclick;
	374	g_object_get(GetSettingsForWindowScreen(window),
	375	"gtk-double-click-time", &dclick, NULL);
	376	return dclick;
	377
	378	case wxSYS_DRAG_X:
	379	case wxSYS_DRAG_Y:
	380	gint drag_threshold;
	381	g_object_get(GetSettingsForWindowScreen(window),
	382	"gtk-dnd-drag-threshold", &drag_threshold, NULL);
	383
	384	// The correct thing here would be to double the value
	385	// since that is what the API wants. But the values
	386	// are much bigger under GNOME than under Windows and
	387	// just seem to much in many cases to be useful.
	388	// drag_threshold *= 2;
	389
	390	return drag_threshold;
	391
	392	case wxSYS_ICON_X:
	393	case wxSYS_ICON_Y:
	394	return 32;
	395
	396	case wxSYS_SCREEN_X:
	397	if (window)
	398	return gdk_screen_get_width(gdk_drawable_get_screen(window));
	399	else
	400	return gdk_screen_width();
	401
	402	case wxSYS_SCREEN_Y:
	403	if (window)
	404	return gdk_screen_get_height(gdk_drawable_get_screen(window));
	405	else
	406	return gdk_screen_height();
	407
	408	case wxSYS_HSCROLL_Y:
	409	case wxSYS_VSCROLL_X:
	410	return 15;
	411
	412	case wxSYS_CAPTION_Y:
	413	if (!window)
	414	// No realized window specified, and no implementation for that case yet.
	415	return -1;
	416
	417	wxASSERT_MSG( wxDynamicCast(win, wxTopLevelWindow),
	418	wxT("Asking for caption height of a non toplevel window") );
	419
	420	// Get the height of the top windowmanager border.
	421	// This is the titlebar in most cases. The titlebar might be elsewhere, and
	422	// we could check which is the thickest wm border to decide on which side the
	423	// titlebar is, but this might lead to interesting behaviours in used code.
	424	// Reconsider when we have a way to report to the user on which side it is.
	425	{
	426	int top;
	427	if (wxGetFrameExtents(window, NULL, NULL, &top, NULL))
	428	{
	429	return top; // top frame extent
	430	}
	431	}
	432
	433	// Try a default approach without a window pointer, if possible
	434	// ...
	435
	436	return -1;
	437
	438	case wxSYS_PENWINDOWS_PRESENT:
	439	// No MS Windows for Pen computing extension available in X11 based gtk+.
	440	return 0;
	441
	442	default:
	443	return -1; // metric is unknown
	444	}
	445	}
	446
	447	bool wxSystemSettingsNative::HasFeature(wxSystemFeature index)
	448	{
	449	switch (index)
	450	{
	451	case wxSYS_CAN_ICONIZE_FRAME:
	452	return false;
	453
	454	case wxSYS_CAN_DRAW_FRAME_DECORATIONS:
	455	return true;
	456
	457	default:
	458	return false;
	459	}
	460	}