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/* gtkfontchooserutils.h - Private utility functions for implementing a
* GtkFontChooser interface
*
* Copyright (C) 2006 Emmanuele Bassi
*
* All rights reserved
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Based on gtkfilechooserutils.c:
* Copyright (C) 2003 Red Hat, Inc.
*/
#include "config.h"
#include "gtkfontchooserutils.h"
static GtkFontChooser *
get_delegate (GtkFontChooser *receiver)
{
return g_object_get_qdata (G_OBJECT (receiver),
GTK_FONT_CHOOSER_DELEGATE_QUARK);
}
static PangoFontFamily *
delegate_get_font_family (GtkFontChooser *chooser)
{
return gtk_font_chooser_get_font_family (get_delegate (chooser));
}
static PangoFontFace *
delegate_get_font_face (GtkFontChooser *chooser)
{
return gtk_font_chooser_get_font_face (get_delegate (chooser));
}
static int
delegate_get_font_size (GtkFontChooser *chooser)
{
return gtk_font_chooser_get_font_size (get_delegate (chooser));
}
static void
delegate_set_filter_func (GtkFontChooser *chooser,
GtkFontFilterFunc filter_func,
gpointer filter_data,
GDestroyNotify data_destroy)
{
gtk_font_chooser_set_filter_func (get_delegate (chooser),
filter_func,
filter_data,
data_destroy);
}
static void
delegate_notify (GObject *object,
GParamSpec *pspec,
gpointer user_data)
{
gpointer iface;
iface = g_type_interface_peek (g_type_class_peek (G_OBJECT_TYPE (object)),
GTK_TYPE_FONT_CHOOSER);
if (g_object_interface_find_property (iface, pspec->name))
g_object_notify_by_pspec (user_data, pspec);
}
static void
delegate_font_activated (GtkFontChooser *receiver,
const gchar *fontname,
GtkFontChooser *delegate)
{
_gtk_font_chooser_font_activated (delegate, fontname);
}
GQuark
_gtk_font_chooser_delegate_get_quark (void)
{
static GQuark quark = 0;
if (G_UNLIKELY (quark == 0))
quark = g_quark_from_static_string ("gtk-font-chooser-delegate");
return quark;
}
/**
* _gtk_font_chooser_install_properties:
* @klass: the class structure for a type deriving from #GObject
*
* Installs the necessary properties for a class implementing
* #GtkFontChooser. A #GtkParamSpecOverride property is installed
* for each property, using the values from the #GtkFontChooserProp
* enumeration. The caller must make sure itself that the enumeration
* values don’t collide with some other property values they
* are using.
*/
void
_gtk_font_chooser_install_properties (GObjectClass *klass)
{
g_object_class_override_property (klass,
GTK_FONT_CHOOSER_PROP_FONT,
"font");
g_object_class_override_property (klass,
GTK_FONT_CHOOSER_PROP_FONT_DESC,
"font-desc");
g_object_class_override_property (klass,
GTK_FONT_CHOOSER_PROP_PREVIEW_TEXT,
"preview-text");
g_object_class_override_property (klass,
GTK_FONT_CHOOSER_PROP_SHOW_PREVIEW_ENTRY,
"show-preview-entry");
}
/**
* _gtk_font_chooser_delegate_iface_init:
* @iface: a #GtkFontChooserIface
*
* An interface-initialization function for use in cases where
* an object is simply delegating the methods, signals of
* the #GtkFontChooser interface to another object.
* _gtk_font_chooser_set_delegate() must be called on each
* instance of the object so that the delegate object can
* be found.
*/
void
_gtk_font_chooser_delegate_iface_init (GtkFontChooserIface *iface)
{
iface->get_font_family = delegate_get_font_family;
iface->get_font_face = delegate_get_font_face;
iface->get_font_size = delegate_get_font_size;
iface->set_filter_func = delegate_set_filter_func;
}
/**
* _gtk_font_chooser_set_delegate:
* @receiver: a #GObject implementing #GtkFontChooser
* @delegate: another #GObject implementing #GtkFontChooser
*
* Establishes that calls on @receiver for #GtkFontChooser
* methods should be delegated to @delegate, and that
* #GtkFontChooser signals emitted on @delegate should be
* forwarded to @receiver. Must be used in conjunction with
* _gtk_font_chooser_delegate_iface_init().
*/
void
_gtk_font_chooser_set_delegate (GtkFontChooser *receiver,
GtkFontChooser *delegate)
{
g_return_if_fail (GTK_IS_FONT_CHOOSER (receiver));
g_return_if_fail (GTK_IS_FONT_CHOOSER (delegate));
g_object_set_qdata (G_OBJECT (receiver),
GTK_FONT_CHOOSER_DELEGATE_QUARK,
delegate);
g_signal_connect (delegate, "notify",
G_CALLBACK (delegate_notify), receiver);
g_signal_connect (delegate, "font-activated",
G_CALLBACK (delegate_font_activated), receiver);
}
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