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wxwidgets/src/gtk/settings.cpp
Vadim Zeitlin d6af0236c5 Simplify GTK+ 2 version checks with a helper function 
Use wx_is_at_least_gtk2(minor) instead of gtk_check_version(2, minor)
because it is more clear and also works as expected (i.e. returns true)
when using GTK+ 3 instead of creating difficult to notice bugs in the
code by failing the version check in this case.

See #18004.
2017-11-23 13:15:31 +01:00

1050 lines
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/////////////////////////////////////////////////////////////////////////////
// Name: src/gtk/settings.cpp
// Purpose:
// Author: Robert Roebling
// Modified by: Mart Raudsepp (GetMetric)
// 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"
#include "wx/module.h"
#endif
#include "wx/fontutil.h"
#include "wx/fontenum.h"
#include <gtk/gtk.h>
#include "wx/gtk/private/win_gtk.h"
#include "wx/gtk/private/gtk2-compat.h"
bool wxGetFrameExtents(GdkWindow* window, int* left, int* right, int* top, int* bottom);
// ----------------------------------------------------------------------------
// wxSystemSettings implementation
// ----------------------------------------------------------------------------
static wxFont gs_fontSystem;
#ifndef __WXGTK3__
static GtkWidget* gs_tlw_parent;
static GtkContainer* ContainerWidget()
{
static GtkContainer* s_widget;
if (s_widget == NULL)
{
s_widget = GTK_CONTAINER(gtk_fixed_new());
g_object_add_weak_pointer(G_OBJECT(s_widget), (void**)&s_widget);
gs_tlw_parent = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_container_add(GTK_CONTAINER(gs_tlw_parent), GTK_WIDGET(s_widget));
}
return s_widget;
}
extern "C" {
static void style_set(GtkWidget*, GtkStyle*, void*)
{
gs_fontSystem = wxNullFont;
}
}
static GtkWidget* ButtonWidget()
{
static GtkWidget* s_widget;
if (s_widget == NULL)
{
s_widget = gtk_button_new();
g_object_add_weak_pointer(G_OBJECT(s_widget), (void**)&s_widget);
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;
}
static GtkWidget* ListWidget()
{
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)));
g_object_add_weak_pointer(G_OBJECT(s_widget), (void**)&s_widget);
gtk_container_add(ContainerWidget(), s_widget);
gtk_widget_ensure_style(s_widget);
}
return s_widget;
}
static GtkWidget* TextCtrlWidget()
{
static GtkWidget* s_widget;
if (s_widget == NULL)
{
s_widget = gtk_text_view_new();
g_object_add_weak_pointer(G_OBJECT(s_widget), (void**)&s_widget);
gtk_container_add(ContainerWidget(), s_widget);
gtk_widget_ensure_style(s_widget);
}
return s_widget;
}
static GtkWidget* MenuItemWidget()
{
static GtkWidget* s_widget;
if (s_widget == NULL)
{
s_widget = gtk_menu_item_new();
g_object_add_weak_pointer(G_OBJECT(s_widget), (void**)&s_widget);
gtk_container_add(ContainerWidget(), s_widget);
gtk_widget_ensure_style(s_widget);
}
return s_widget;
}
static GtkWidget* MenuBarWidget()
{
static GtkWidget* s_widget;
if (s_widget == NULL)
{
s_widget = gtk_menu_bar_new();
g_object_add_weak_pointer(G_OBJECT(s_widget), (void**)&s_widget);
gtk_container_add(ContainerWidget(), s_widget);
gtk_widget_ensure_style(s_widget);
}
return s_widget;
}
static GtkWidget* ToolTipWidget()
{
static GtkWidget* s_widget;
if (s_widget == NULL)
{
s_widget = gtk_window_new(GTK_WINDOW_POPUP);
g_object_add_weak_pointer(G_OBJECT(s_widget), (void**)&s_widget);
g_signal_connect_swapped(ContainerWidget(), "destroy",
G_CALLBACK(gtk_widget_destroy), s_widget);
const char* name = "gtk-tooltip";
if (!wx_is_at_least_gtk2(11))
name = "gtk-tooltips";
gtk_widget_set_name(s_widget, name);
gtk_widget_ensure_style(s_widget);
}
return s_widget;
}
#endif // !__WXGTK3__
#ifdef __WXGTK3__
#if !GTK_CHECK_VERSION(3,12,0)
#define GTK_STATE_FLAG_LINK (1 << 9)
#endif
static wxColour gs_systemColorCache[wxSYS_COLOUR_MAX + 1];
extern "C" {
static void notify_gtk_theme_name(GObject*, GParamSpec*, void*)
{
gs_fontSystem.UnRef();
for (int i = wxSYS_COLOUR_MAX; i--;)
gs_systemColorCache[i].UnRef();
}
static void notify_gtk_font_name(GObject*, GParamSpec*, void*)
{
gs_fontSystem.UnRef();
}
}
// Some notes on using GtkStyleContext. Style information from a context
// attached to a non-visible GtkWidget is not accurate. The context has an
// internal visibility state, controlled by the widget, which it presumably
// uses to avoid doing unnecessary work. Creating a new style context from the
// GtkWidgetPath in a context attached to a widget also does not work. The path
// does not accurately reproduce the context state with older versions of GTK+,
// and there is no context hierarchy (parent contexts). The hierarchy of parent
// contexts is necessary, even though it would seem that the widget path has
// the same hierarchy in it. So the best way to get style information seems
// to be creating the widget paths and context hierarchy directly.
static GtkStyleContext* StyleContext(
GtkStyleContext* parent,
GtkWidgetPath* path,
GType type,
const char* objectName,
const char* className1 = NULL,
const char* className2 = NULL)
{
gtk_widget_path_append_type(path, type);
#if GTK_CHECK_VERSION(3,20,0)
if (gtk_check_version(3,20,0) == NULL)
gtk_widget_path_iter_set_object_name(path, -1, objectName);
#else
wxUnusedVar(objectName);
#endif
if (className1)
gtk_widget_path_iter_add_class(path, -1, className1);
if (className2)
gtk_widget_path_iter_add_class(path, -1, className2);
GtkStyleContext* sc = gtk_style_context_new();
gtk_style_context_set_path(sc, path);
if (parent)
{
#if GTK_CHECK_VERSION(3,4,0)
if (gtk_check_version(3,4,0) == NULL)
gtk_style_context_set_parent(sc, parent);
#endif
g_object_unref(parent);
}
return sc;
}
static GtkStyleContext* StyleContext(
GtkWidgetPath* path,
GType type,
const char* objectName,
const char* className1 = NULL,
const char* className2 = NULL)
{
GtkStyleContext* sc;
sc = StyleContext(NULL, path, GTK_TYPE_WINDOW, "window", "background");
sc = StyleContext(sc, path, type, objectName, className1, className2);
return sc;
}
static void StyleContextFree(GtkStyleContext* sc)
{
if (gtk_check_version(3,16,0) == NULL || gtk_check_version(3,4,0))
{
g_object_unref(sc);
return;
}
#if GTK_CHECK_VERSION(3,4,0)
// GTK+ < 3.16 does not properly handle freeing child context before parent
do {
GtkStyleContext* parent = gtk_style_context_get_parent(sc);
if (parent)
{
g_object_ref(parent);
gtk_style_context_set_parent(sc, NULL);
}
g_object_unref(sc);
sc = parent;
} while (sc);
#endif
}
static GtkStyleContext* ButtonContext(GtkWidgetPath* path)
{
GtkStyleContext* sc;
sc = StyleContext(path, GTK_TYPE_BUTTON, "button", "button");
return sc;
}
static GtkStyleContext* ButtonLabelContext(GtkWidgetPath* path)
{
GtkStyleContext* sc;
sc = ButtonContext(path);
sc = StyleContext(sc, path, GTK_TYPE_LABEL, "label");
return sc;
}
static GtkStyleContext* HeaderbarContext(GtkWidgetPath* path)
{
GtkStyleContext* sc;
sc = StyleContext(path, GTK_TYPE_HEADER_BAR, "headerbar", "titlebar", "header-bar");
return sc;
}
static GtkStyleContext* HeaderbarLabelContext(GtkWidgetPath* path)
{
GtkStyleContext* sc;
sc = HeaderbarContext(path);
sc = StyleContext(sc, path, GTK_TYPE_LABEL, "label");
return sc;
}
static GtkStyleContext* MenuContext(GtkWidgetPath* path)
{
GtkStyleContext* sc;
sc = StyleContext(NULL, path, GTK_TYPE_WINDOW, "window", "background", "popup");
sc = StyleContext(sc, path, GTK_TYPE_MENU, "menu", "menu");
return sc;
}
static GtkStyleContext* MenuItemContext(GtkWidgetPath* path)
{
GtkStyleContext* sc;
sc = MenuContext(path);
sc = StyleContext(sc, path, GTK_TYPE_MENU_ITEM, "menuitem", "menuitem");
return sc;
}
static GtkStyleContext* TextviewContext(GtkWidgetPath* path, const char* child1 = NULL, const char* child2 = NULL)
{
GtkStyleContext* sc;
sc = StyleContext(path, GTK_TYPE_TEXT_VIEW, "textview", "view");
if (child1 && gtk_check_version(3,20,0) == NULL)
{
sc = StyleContext(sc, path, G_TYPE_NONE, child1);
if (child2)
sc = StyleContext(sc, path, G_TYPE_NONE, child2);
}
return sc;
}
static GtkStyleContext* TreeviewContext(GtkWidgetPath* path)
{
GtkStyleContext* sc;
sc = StyleContext(path, GTK_TYPE_TREE_VIEW, "treeview", "view");
return sc;
}
static GtkStyleContext* TooltipContext(GtkWidgetPath* path)
{
gtk_widget_path_append_type(path, GTK_TYPE_WINDOW);
#if GTK_CHECK_VERSION(3,20,0)
if (gtk_check_version(3,20,0) == NULL)
gtk_widget_path_iter_set_object_name(path, -1, "tooltip");
#endif
gtk_widget_path_iter_add_class(path, -1, "background");
gtk_widget_path_iter_add_class(path, -1, "tooltip");
gtk_widget_path_iter_set_name(path, -1, "gtk-tooltip");
GtkStyleContext* sc = gtk_style_context_new();
gtk_style_context_set_path(sc, path);
return sc;
}
static void bg(GtkStyleContext* sc, wxColour& color, int state = GTK_STATE_FLAG_NORMAL)
{
GdkRGBA* rgba;
cairo_pattern_t* pattern = NULL;
gtk_style_context_set_state(sc, GtkStateFlags(state));
gtk_style_context_get(sc, GtkStateFlags(state),
"background-color", &rgba, "background-image", &pattern, NULL);
color = wxColour(*rgba);
gdk_rgba_free(rgba);
// "background-image" takes precedence over "background-color".
// If there is an image, try to get a color out of it.
if (pattern)
{
if (cairo_pattern_get_type(pattern) == CAIRO_PATTERN_TYPE_SURFACE)
{
cairo_surface_t* surf;
cairo_pattern_get_surface(pattern, &surf);
if (cairo_surface_get_type(surf) == CAIRO_SURFACE_TYPE_IMAGE)
{
const guchar* data = cairo_image_surface_get_data(surf);
const int stride = cairo_image_surface_get_stride(surf);
// choose a pixel in the middle vertically,
// images often have a vertical gradient
const int i = stride * (cairo_image_surface_get_height(surf) / 2);
const unsigned* p = reinterpret_cast<const unsigned*>(data + i);
const unsigned pixel = *p;
guchar r, g, b, a = 0xff;
switch (cairo_image_surface_get_format(surf))
{
case CAIRO_FORMAT_ARGB32:
a = guchar(pixel >> 24);
wxFALLTHROUGH;
case CAIRO_FORMAT_RGB24:
r = guchar(pixel >> 16);
g = guchar(pixel >> 8);
b = guchar(pixel);
break;
default:
a = 0;
break;
}
if (a != 0)
{
if (a != 0xff)
{
// un-premultiply
r = guchar((r * 0xff) / a);
g = guchar((g * 0xff) / a);
b = guchar((b * 0xff) / a);
}
color.Set(r, g, b, a);
}
}
}
cairo_pattern_destroy(pattern);
}
if (color.Alpha() == 0)
{
// Try TLW as last resort, but not if we're already doing it
const GtkWidgetPath* path0 = gtk_style_context_get_path(sc);
if (gtk_widget_path_length(path0) > 1 ||
gtk_widget_path_iter_get_object_type(path0, 0) != GTK_TYPE_WINDOW)
{
GtkWidgetPath* path = gtk_widget_path_new();
GtkStyleContext* sc2;
sc2 = StyleContext(NULL, path, GTK_TYPE_WINDOW, "window", "background");
gtk_widget_path_unref(path);
bg(sc2, color, state);
}
}
StyleContextFree(sc);
}
static void fg(GtkStyleContext* sc, wxColour& color, int state = GTK_STATE_FLAG_NORMAL)
{
GdkRGBA rgba;
gtk_style_context_set_state(sc, GtkStateFlags(state));
gtk_style_context_get_color(sc, GtkStateFlags(state), &rgba);
color = wxColour(rgba);
StyleContextFree(sc);
}
static void border(GtkStyleContext* sc, wxColour& color)
{
GdkRGBA* rgba;
gtk_style_context_get(sc, GTK_STATE_FLAG_NORMAL, "border-color", &rgba, NULL);
color = wxColour(*rgba);
gdk_rgba_free(rgba);
StyleContextFree(sc);
}
wxColour wxSystemSettingsNative::GetColour(wxSystemColour index)
{
if (unsigned(index) > wxSYS_COLOUR_MAX)
index = wxSYS_COLOUR_MAX;
wxColour& color = gs_systemColorCache[index];
if (color.IsOk())
return color;
static bool once;
if (!once)
{
once = true;
g_signal_connect(gtk_settings_get_default(), "notify::gtk-theme-name",
G_CALLBACK(notify_gtk_theme_name), NULL);
}
GtkWidgetPath* path = gtk_widget_path_new();
GtkStyleContext* sc;
switch (index)
{
case wxSYS_COLOUR_ACTIVECAPTION:
case wxSYS_COLOUR_INACTIVECAPTION:
#if GTK_CHECK_VERSION(3,10,0)
if (gtk_check_version(3,10,0) == NULL)
{
sc = HeaderbarContext(path);
int state = GTK_STATE_FLAG_NORMAL;
if (index == wxSYS_COLOUR_INACTIVECAPTION)
state = GTK_STATE_FLAG_BACKDROP;
bg(sc, color, state);
break;
}
#endif
wxFALLTHROUGH;
case wxSYS_COLOUR_3DLIGHT:
case wxSYS_COLOUR_ACTIVEBORDER:
case wxSYS_COLOUR_BTNFACE:
case wxSYS_COLOUR_DESKTOP:
case wxSYS_COLOUR_INACTIVEBORDER:
case wxSYS_COLOUR_SCROLLBAR:
case wxSYS_COLOUR_WINDOWFRAME:
sc = ButtonContext(path);
bg(sc, color);
break;
case wxSYS_COLOUR_HIGHLIGHT:
sc = TextviewContext(path, "text", "selection");
bg(sc, color, GTK_STATE_FLAG_SELECTED | GTK_STATE_FLAG_FOCUSED);
break;
case wxSYS_COLOUR_HIGHLIGHTTEXT:
sc = TextviewContext(path, "text", "selection");
fg(sc, color, GTK_STATE_FLAG_SELECTED | GTK_STATE_FLAG_FOCUSED);
break;
case wxSYS_COLOUR_WINDOWTEXT:
sc = TextviewContext(path, "text");
fg(sc, color);
break;
case wxSYS_COLOUR_BTNHIGHLIGHT:
sc = ButtonContext(path);
bg(sc, color, GTK_STATE_FLAG_PRELIGHT);
break;
case wxSYS_COLOUR_BTNSHADOW:
sc = ButtonContext(path);
border(sc, color);
break;
case wxSYS_COLOUR_CAPTIONTEXT:
#if GTK_CHECK_VERSION(3,10,0)
if (gtk_check_version(3,10,0) == NULL)
{
sc = HeaderbarLabelContext(path);
fg(sc, color);
break;
}
#endif
wxFALLTHROUGH;
case wxSYS_COLOUR_BTNTEXT:
sc = ButtonLabelContext(path);
fg(sc, color);
break;
case wxSYS_COLOUR_INACTIVECAPTIONTEXT:
#if GTK_CHECK_VERSION(3,10,0)
if (gtk_check_version(3,10,0) == NULL)
{
sc = HeaderbarLabelContext(path);
fg(sc, color, GTK_STATE_FLAG_BACKDROP);
break;
}
#endif
wxFALLTHROUGH;
case wxSYS_COLOUR_GRAYTEXT:
sc = StyleContext(path, GTK_TYPE_LABEL, "label");
fg(sc, color, GTK_STATE_FLAG_INSENSITIVE);
break;
case wxSYS_COLOUR_HOTLIGHT:
sc = StyleContext(path, GTK_TYPE_LINK_BUTTON, "button", "link");
if (gtk_check_version(3,12,0) == NULL)
fg(sc, color, GTK_STATE_FLAG_LINK);
else
{
wxGCC_WARNING_SUPPRESS(deprecated-declarations)
GValue value = G_VALUE_INIT;
g_value_init(&value, GDK_TYPE_COLOR);
gtk_style_context_get_style_property(sc, "link-color", &value);
GdkColor* link_color = static_cast<GdkColor*>(g_value_get_boxed(&value));
GdkColor gdkColor = { 0, 0, 0, 0xeeee };
if (link_color)
gdkColor = *link_color;
color = wxColour(gdkColor);
g_value_unset(&value);
StyleContextFree(sc);
wxGCC_WARNING_RESTORE()
}
break;
case wxSYS_COLOUR_INFOBK:
sc = TooltipContext(path);
bg(sc, color);
break;
case wxSYS_COLOUR_INFOTEXT:
sc = TooltipContext(path);
sc = StyleContext(sc, path, GTK_TYPE_LABEL, "label");
fg(sc, color);
break;
case wxSYS_COLOUR_LISTBOX:
sc = TreeviewContext(path);
bg(sc, color);
break;
case wxSYS_COLOUR_LISTBOXHIGHLIGHTTEXT:
sc = TreeviewContext(path);
fg(sc, color, GTK_STATE_FLAG_SELECTED | GTK_STATE_FLAG_FOCUSED);
break;
case wxSYS_COLOUR_LISTBOXTEXT:
sc = TreeviewContext(path);
fg(sc, color);
break;
case wxSYS_COLOUR_MENU:
sc = MenuContext(path);
bg(sc, color);
break;
case wxSYS_COLOUR_MENUBAR:
sc = StyleContext(path, GTK_TYPE_MENU_BAR, "menubar", "menubar");
bg(sc, color);
break;
case wxSYS_COLOUR_MENUHILIGHT:
sc = MenuItemContext(path);
bg(sc, color, GTK_STATE_FLAG_PRELIGHT);
break;
case wxSYS_COLOUR_MENUTEXT:
sc = MenuItemContext(path);
sc = StyleContext(sc, path, GTK_TYPE_LABEL, "label");
fg(sc, color);
break;
case wxSYS_COLOUR_APPWORKSPACE:
case wxSYS_COLOUR_WINDOW:
sc = TextviewContext(path);
bg(sc, color);
break;
case wxSYS_COLOUR_3DDKSHADOW:
case wxSYS_COLOUR_GRADIENTACTIVECAPTION:
case wxSYS_COLOUR_GRADIENTINACTIVECAPTION:
color.Set(0, 0, 0);
break;
default:
wxFAIL_MSG("invalid system colour index");
color.Set(0, 0, 0, 0);
break;
}
gtk_widget_path_unref(path);
return color;
}
#else // !__WXGTK3__
static const GtkStyle* ButtonStyle()
{
return gtk_widget_get_style(ButtonWidget());
}
static const GtkStyle* ListStyle()
{
return gtk_widget_get_style(ListWidget());
}
static const GtkStyle* TextCtrlStyle()
{
return gtk_widget_get_style(TextCtrlWidget());
}
static const GtkStyle* MenuItemStyle()
{
return gtk_widget_get_style(MenuItemWidget());
}
static const GtkStyle* MenuBarStyle()
{
return gtk_widget_get_style(MenuBarWidget());
}
static const GtkStyle* ToolTipStyle()
{
return gtk_widget_get_style(ToolTipWidget());
}
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;
}
#endif // !__WXGTK3__
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.IsOk())
{
wxNativeFontInfo info;
#ifdef __WXGTK3__
static bool once;
if (!once)
{
once = true;
g_signal_connect(gtk_settings_get_default(), "notify::gtk-font-name",
G_CALLBACK(notify_gtk_font_name), NULL);
}
GtkWidgetPath* path = gtk_widget_path_new();
GtkStyleContext* sc;
sc = ButtonLabelContext(path);
gtk_style_context_get(sc, GTK_STATE_FLAG_NORMAL,
GTK_STYLE_PROPERTY_FONT, &info.description, NULL);
gtk_widget_path_unref(path);
StyleContextFree(sc);
#else
info.description = ButtonStyle()->font_desc;
#endif
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
#ifndef __WXGTK3__
info.description = NULL;
#endif
}
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_window_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);
GtkBorder border;
pizza->get_border(border);
switch (index)
{
case wxSYS_BORDER_X:
case wxSYS_EDGE_X:
case wxSYS_FRAMESIZE_X:
return border.left;
default:
return border.top;
}
}
return -1;
}
int wxSystemSettingsNative::GetMetric( wxSystemMetric index, wxWindow* win )
{
GdkWindow *window = NULL;
if (win)
window = gtk_widget_get_window(win->GetHandle());
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_window_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_CARET_ON_MSEC:
{
gint blink_time = -1;
g_object_get(GetSettingsForWindowScreen(window),
"gtk-cursor-blink-time", &blink_time, NULL);
if (blink_time > 0)
return blink_time / 2;
return -1;
}
case wxSYS_CARET_OFF_MSEC:
{
gboolean should_blink = true;
gint blink_time = -1;
g_object_get(GetSettingsForWindowScreen(window),
"gtk-cursor-blink", &should_blink,
"gtk-cursor-blink-time", &blink_time,
NULL);
if (!should_blink)
return 0;
if (blink_time > 0)
return blink_time / 2;
return -1;
}
case wxSYS_CARET_TIMEOUT_MSEC:
{
gboolean should_blink = true;
gint timeout = 0;
g_object_get(GetSettingsForWindowScreen(window),
"gtk-cursor-blink", &should_blink,
"gtk-cursor-blink-timeout", &timeout,
NULL);
if (!should_blink)
return 0;
// GTK+ returns this value in seconds, not milliseconds,
// Special value of 2147483647 means that the cursor never
// blinks and we handle any value that would overflow int after
// multiplication in the same manner as it looks quite
// unnecessary to support cursor blinking once a month.
if (timeout > 0 && timeout < 2147483647 / 1000)
return timeout * 1000;
return -1; // no timeout, blink forever
}
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_window_get_screen(window));
else
return gdk_screen_width();
case wxSYS_SCREEN_Y:
if (window)
return gdk_screen_get_height(gdk_window_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;
}
}
class wxSystemSettingsModule: public wxModule
{
public:
virtual bool OnInit() wxOVERRIDE { return true; }
virtual void OnExit() wxOVERRIDE;
wxDECLARE_DYNAMIC_CLASS(wxSystemSettingsModule);
};
wxIMPLEMENT_DYNAMIC_CLASS(wxSystemSettingsModule, wxModule);
void wxSystemSettingsModule::OnExit()
{
#ifdef __WXGTK3__
GtkSettings* settings = gtk_settings_get_default();
g_signal_handlers_disconnect_by_func(settings,
(void*)notify_gtk_theme_name, NULL);
g_signal_handlers_disconnect_by_func(settings,
(void*)notify_gtk_font_name, NULL);
#else
if (gs_tlw_parent)
{
gtk_widget_destroy(gs_tlw_parent);
gs_tlw_parent = NULL;
}
#endif
}
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