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/cmndata.h"
    #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_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/cmndata.h"
	18	#include "wx/toplevel.h"
	19	#endif
	20
	21	#include "wx/fontutil.h"
	22	#include "wx/fontenum.h"
	23
	24	#include <gtk/gtk.h>
	25	#include "wx/gtk/private/win_gtk.h"
	26
	27	bool wxGetFrameExtents(GdkWindow* window, int* left, int* right, int* top, int* bottom);
	28
	29	// ----------------------------------------------------------------------------
	30	// wxSystemSettings implementation
	31	// ----------------------------------------------------------------------------
	32
	33	static wxFont gs_fontSystem;
	34
	35	static GtkContainer* ContainerWidget()
	36	{
	37	static GtkContainer* s_widget;
	38	if (s_widget == NULL)
	39	{
	40	s_widget = GTK_CONTAINER(gtk_fixed_new());
	41	GtkWidget* window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
	42	gtk_container_add(GTK_CONTAINER(window), GTK_WIDGET(s_widget));
	43	}
	44	return s_widget;
	45	}
	46
	47	extern "C" {
	48	static void style_set(GtkWidget, GtkStyle, void*)
	49	{
	50	gs_fontSystem = wxNullFont;
	51	}
	52	}
	53
	54	static const GtkStyle* ButtonStyle()
	55	{
	56	static GtkWidget* s_widget;
	57	if (s_widget == NULL)
	58	{
	59	s_widget = gtk_button_new();
	60	gtk_container_add(ContainerWidget(), s_widget);
	61	gtk_widget_ensure_style(s_widget);
	62	g_signal_connect(s_widget, "style_set", G_CALLBACK(style_set), NULL);
	63	}
	64	return s_widget->style;
	65	}
	66
	67	static const GtkStyle* ListStyle()
	68	{
	69	static GtkWidget* s_widget;
	70	if (s_widget == NULL)
	71	{
	72	s_widget = gtk_tree_view_new_with_model(
	73	GTK_TREE_MODEL(gtk_list_store_new(1, G_TYPE_INT)));
	74	gtk_container_add(ContainerWidget(), s_widget);
	75	gtk_widget_ensure_style(s_widget);
	76	}
	77	return s_widget->style;
	78	}
	79
	80	static const GtkStyle* TextCtrlStyle()
	81	{
	82	static GtkWidget* s_widget;
	83	if (s_widget == NULL)
	84	{
	85	s_widget = gtk_text_view_new();
	86	gtk_container_add(ContainerWidget(), s_widget);
	87	gtk_widget_ensure_style(s_widget);
	88	}
	89	return s_widget->style;
	90	}
	91
	92	static const GtkStyle* MenuItemStyle()
	93	{
	94	static GtkWidget* s_widget;
	95	if (s_widget == NULL)
	96	{
	97	s_widget = gtk_menu_item_new();
	98	gtk_container_add(ContainerWidget(), s_widget);
	99	gtk_widget_ensure_style(s_widget);
	100	}
	101	return s_widget->style;
	102	}
	103
	104	static const GtkStyle* MenuBarStyle()
	105	{
	106	static GtkWidget* s_widget;
	107	if (s_widget == NULL)
	108	{
	109	s_widget = gtk_menu_bar_new();
	110	gtk_container_add(ContainerWidget(), s_widget);
	111	gtk_widget_ensure_style(s_widget);
	112	}
	113	return s_widget->style;
	114	}
	115
	116	static const GtkStyle* ToolTipStyle()
	117	{
	118	static GtkWidget* s_widget;
	119	if (s_widget == NULL)
	120	{
	121	s_widget = gtk_window_new(GTK_WINDOW_POPUP);
	122	const char* name = "gtk-tooltip";
	123	if (gtk_check_version(2, 11, 0))
	124	name = "gtk-tooltips";
	125	gtk_widget_set_name(s_widget, name);
	126	gtk_widget_ensure_style(s_widget);
	127	}
	128	return s_widget->style;
	129	}
	130
	131	wxColour wxSystemSettingsNative::GetColour( wxSystemColour index )
	132	{
	133	wxColor color;
	134	switch (index)
	135	{
	136	case wxSYS_COLOUR_SCROLLBAR:
	137	case wxSYS_COLOUR_BACKGROUND:
	138	//case wxSYS_COLOUR_DESKTOP:
	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_3DFACE:
	146	case wxSYS_COLOUR_3DLIGHT:
	147	color = wxColor(ButtonStyle()->bg[GTK_STATE_NORMAL]);
	148	break;
	149
	150	case wxSYS_COLOUR_WINDOW:
	151	color = wxColor(TextCtrlStyle()->base[GTK_STATE_NORMAL]);
	152	break;
	153
	154	case wxSYS_COLOUR_MENUBAR:
	155	color = wxColor(MenuBarStyle()->bg[GTK_STATE_NORMAL]);
	156	break;
	157
	158	case wxSYS_COLOUR_3DDKSHADOW:
	159	color = *wxBLACK;
	160	break;
	161
	162	case wxSYS_COLOUR_GRAYTEXT:
	163	case wxSYS_COLOUR_BTNSHADOW:
	164	//case wxSYS_COLOUR_3DSHADOW:
	165	{
	166	wxColour faceColour(GetColour(wxSYS_COLOUR_3DFACE));
	167	color =
	168	wxColour((unsigned char) (faceColour.Red() * 2 / 3),
	169	(unsigned char) (faceColour.Green() * 2 / 3),
	170	(unsigned char) (faceColour.Blue() * 2 / 3));
	171	}
	172	break;
	173
	174	case wxSYS_COLOUR_BTNHIGHLIGHT:
	175	//case wxSYS_COLOUR_BTNHILIGHT:
	176	//case wxSYS_COLOUR_3DHIGHLIGHT:
	177	//case wxSYS_COLOUR_3DHILIGHT:
	178	color = *wxWHITE;
	179	break;
	180
	181	case wxSYS_COLOUR_HIGHLIGHT:
	182	color = wxColor(ButtonStyle()->bg[GTK_STATE_SELECTED]);
	183	break;
	184
	185	case wxSYS_COLOUR_LISTBOX:
	186	color = wxColor(ListStyle()->base[GTK_STATE_NORMAL]);
	187	break;
	188
	189	case wxSYS_COLOUR_LISTBOXTEXT:
	190	color = wxColor(ListStyle()->text[GTK_STATE_NORMAL]);
	191	break;
	192
	193	case wxSYS_COLOUR_MENUTEXT:
	194	case wxSYS_COLOUR_WINDOWTEXT:
	195	case wxSYS_COLOUR_CAPTIONTEXT:
	196	case wxSYS_COLOUR_INACTIVECAPTIONTEXT:
	197	case wxSYS_COLOUR_BTNTEXT:
	198	color = wxColor(ButtonStyle()->fg[GTK_STATE_NORMAL]);
	199	break;
	200
	201	case wxSYS_COLOUR_INFOBK:
	202	color = wxColor(ToolTipStyle()->bg[GTK_STATE_NORMAL]);
	203	break;
	204
	205	case wxSYS_COLOUR_INFOTEXT:
	206	color = wxColor(ToolTipStyle()->fg[GTK_STATE_NORMAL]);
	207	break;
	208
	209	case wxSYS_COLOUR_HIGHLIGHTTEXT:
	210	color = wxColor(ButtonStyle()->fg[GTK_STATE_SELECTED]);
	211	break;
	212
	213	case wxSYS_COLOUR_APPWORKSPACE:
	214	color = *wxWHITE; // ?
	215	break;
	216
	217	case wxSYS_COLOUR_ACTIVECAPTION:
	218	case wxSYS_COLOUR_MENUHILIGHT:
	219	color = wxColor(MenuItemStyle()->bg[GTK_STATE_SELECTED]);
	220	break;
	221
	222	case wxSYS_COLOUR_HOTLIGHT:
	223	case wxSYS_COLOUR_GRADIENTACTIVECAPTION:
	224	case wxSYS_COLOUR_GRADIENTINACTIVECAPTION:
	225	// TODO
	226	color = *wxBLACK;
	227	break;
	228
	229	case wxSYS_COLOUR_MAX:
	230	default:
	231	wxFAIL_MSG( wxT("unknown system colour index") );
	232	color = *wxWHITE;
	233	break;
	234	}
	235
	236	wxASSERT(color.IsOk());
	237	return color;
	238	}
	239
	240	wxFont wxSystemSettingsNative::GetFont( wxSystemFont index )
	241	{
	242	wxFont font;
	243	switch (index)
	244	{
	245	case wxSYS_OEM_FIXED_FONT:
	246	case wxSYS_ANSI_FIXED_FONT:
	247	case wxSYS_SYSTEM_FIXED_FONT:
	248	font = *wxNORMAL_FONT;
	249	break;
	250
	251	case wxSYS_ANSI_VAR_FONT:
	252	case wxSYS_SYSTEM_FONT:
	253	case wxSYS_DEVICE_DEFAULT_FONT:
	254	case wxSYS_DEFAULT_GUI_FONT:
	255	if (!gs_fontSystem.Ok())
	256	{
	257	wxNativeFontInfo info;
	258	info.description = ButtonStyle()->font_desc;
	259	gs_fontSystem = wxFont(info);
	260
	261	#if wxUSE_FONTENUM
	262	// (try to) heal the default font (on some common systems e.g. Ubuntu
	263	// it's "Sans Serif" but the real font is called "Sans"):
	264	if (!wxFontEnumerator::IsValidFacename(gs_fontSystem.GetFaceName()) &&
	265	gs_fontSystem.GetFaceName() == "Sans Serif")
	266	gs_fontSystem.SetFaceName("Sans");
	267	#endif // wxUSE_FONTENUM
	268
	269	info.description = NULL;
	270	}
	271	font = gs_fontSystem;
	272	break;
	273
	274	default:
	275	break;
	276	}
	277
	278	wxASSERT( font.IsOk() );
	279
	280	return font;
	281	}
	282
	283	// helper: return the GtkSettings either for the screen the current window is
	284	// on or for the default screen if window is NULL
	285	static GtkSettings GetSettingsForWindowScreen(GdkWindow window)
	286	{
	287	return window ? gtk_settings_get_for_screen(gdk_drawable_get_screen(window))
	288	: gtk_settings_get_default();
	289	}
	290
	291	static int GetBorderWidth(wxSystemMetric index, wxWindow* win)
	292	{
	293	if (win->m_wxwindow)
	294	{
	295	wxPizza* pizza = WX_PIZZA(win->m_wxwindow);
	296	int x, y;
	297	pizza->get_border_widths(x, y);
	298	switch (index)
	299	{
	300	case wxSYS_BORDER_X:
	301	case wxSYS_EDGE_X:
	302	case wxSYS_FRAMESIZE_X:
	303	return x;
	304	default:
	305	return y;
	306	}
	307	}
	308	return -1;
	309	}
	310
	311	int wxSystemSettingsNative::GetMetric( wxSystemMetric index, wxWindow* win )
	312	{
	313	GdkWindow *window = NULL;
	314	if(win && GTK_WIDGET_REALIZED(win->GetHandle()))
	315	window = win->GetHandle()->window;
	316
	317	switch (index)
	318	{
	319	case wxSYS_BORDER_X:
	320	case wxSYS_BORDER_Y:
	321	case wxSYS_EDGE_X:
	322	case wxSYS_EDGE_Y:
	323	case wxSYS_FRAMESIZE_X:
	324	case wxSYS_FRAMESIZE_Y:
	325	if (win)
	326	{
	327	wxTopLevelWindow *tlw = wxDynamicCast(win, wxTopLevelWindow);
	328	if (!tlw)
	329	return GetBorderWidth(index, win);
	330	else if (window)
	331	{
	332	// Get the frame extents from the windowmanager.
	333	// In most cases the top extent is the titlebar, so we use the bottom extent
	334	// for the heights.
	335	int right, bottom;
	336	if (wxGetFrameExtents(window, NULL, &right, NULL, &bottom))
	337	{
	338	switch (index)
	339	{
	340	case wxSYS_BORDER_X:
	341	case wxSYS_EDGE_X:
	342	case wxSYS_FRAMESIZE_X:
	343	return right; // width of right extent
	344	default:
	345	return bottom; // height of bottom extent
	346	}
	347	}
	348	}
	349	}
	350
	351	return -1; // no window specified
	352
	353	case wxSYS_CURSOR_X:
	354	case wxSYS_CURSOR_Y:
	355	return gdk_display_get_default_cursor_size(
	356	window ? gdk_drawable_get_display(window)
	357	: gdk_display_get_default());
	358
	359	case wxSYS_DCLICK_X:
	360	case wxSYS_DCLICK_Y:
	361	gint dclick_distance;
	362	g_object_get(GetSettingsForWindowScreen(window),
	363	"gtk-double-click-distance", &dclick_distance, NULL);
	364
	365	return dclick_distance * 2;
	366
	367	case wxSYS_DCLICK_MSEC:
	368	gint dclick;
	369	g_object_get(GetSettingsForWindowScreen(window),
	370	"gtk-double-click-time", &dclick, NULL);
	371	return dclick;
	372
	373	case wxSYS_DRAG_X:
	374	case wxSYS_DRAG_Y:
	375	gint drag_threshold;
	376	g_object_get(GetSettingsForWindowScreen(window),
	377	"gtk-dnd-drag-threshold", &drag_threshold, NULL);
	378
	379	// The correct thing here would be to double the value
	380	// since that is what the API wants. But the values
	381	// are much bigger under GNOME than under Windows and
	382	// just seem to much in many cases to be useful.
	383	// drag_threshold *= 2;
	384
	385	return drag_threshold;
	386
	387	case wxSYS_ICON_X:
	388	case wxSYS_ICON_Y:
	389	return 32;
	390
	391	case wxSYS_SCREEN_X:
	392	if (window)
	393	return gdk_screen_get_width(gdk_drawable_get_screen(window));
	394	else
	395	return gdk_screen_width();
	396
	397	case wxSYS_SCREEN_Y:
	398	if (window)
	399	return gdk_screen_get_height(gdk_drawable_get_screen(window));
	400	else
	401	return gdk_screen_height();
	402
	403	case wxSYS_HSCROLL_Y:
	404	case wxSYS_VSCROLL_X:
	405	return 15;
	406
	407	case wxSYS_CAPTION_Y:
	408	if (!window)
	409	// No realized window specified, and no implementation for that case yet.
	410	return -1;
	411
	412	wxASSERT_MSG( wxDynamicCast(win, wxTopLevelWindow),
	413	wxT("Asking for caption height of a non toplevel window") );
	414
	415	// Get the height of the top windowmanager border.
	416	// This is the titlebar in most cases. The titlebar might be elsewhere, and
	417	// we could check which is the thickest wm border to decide on which side the
	418	// titlebar is, but this might lead to interesting behaviours in used code.
	419	// Reconsider when we have a way to report to the user on which side it is.
	420	{
	421	int top;
	422	if (wxGetFrameExtents(window, NULL, NULL, &top, NULL))
	423	{
	424	return top; // top frame extent
	425	}
	426	}
	427
	428	// Try a default approach without a window pointer, if possible
	429	// ...
	430
	431	return -1;
	432
	433	case wxSYS_PENWINDOWS_PRESENT:
	434	// No MS Windows for Pen computing extension available in X11 based gtk+.
	435	return 0;
	436
	437	default:
	438	return -1; // metric is unknown
	439	}
	440	}
	441
	442	bool wxSystemSettingsNative::HasFeature(wxSystemFeature index)
	443	{
	444	switch (index)
	445	{
	446	case wxSYS_CAN_ICONIZE_FRAME:
	447	return false;
	448
	449	case wxSYS_CAN_DRAW_FRAME_DECORATIONS:
	450	return true;
	451
	452	default:
	453	return false;
	454	}
	455	}