gtk2/gtk/gtkfontchooserdialog.c
Matthias Clasen b6bfeb786f fontchooserdialog: Fix disposing
We need to drop our widgetry in dispose to prevent
leakage.
2020-05-11 12:19:39 -04:00

324 lines
10 KiB
C

/* GTK - The GIMP Toolkit
* Copyright (C) 2011 Alberto Ruiz <aruiz@gnome.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdlib.h>
#include <glib/gprintf.h>
#include <string.h>
#include <atk/atk.h>
#include "gtkfontchooserdialog.h"
#include "gtkfontchooser.h"
#include "gtkfontchooserwidget.h"
#include "gtkfontchooserwidgetprivate.h"
#include "gtkfontchooserutils.h"
#include "gtkbox.h"
#include "gtkintl.h"
#include "gtkaccessible.h"
#include "gtkbuildable.h"
#include "gtkprivate.h"
#include "gtkwidget.h"
#include "gtksettings.h"
#include "gtkdialogprivate.h"
#include "gtktogglebutton.h"
#include "gtkheaderbar.h"
#include "gtkactionable.h"
#include "gtkeventcontrollerkey.h"
typedef struct _GtkFontChooserDialogClass GtkFontChooserDialogClass;
struct _GtkFontChooserDialog
{
GtkDialog parent_instance;
GtkWidget *fontchooser;
GtkWidget *select_button;
GtkWidget *cancel_button;
GtkWidget *tweak_button;
};
struct _GtkFontChooserDialogClass
{
GtkDialogClass parent_class;
};
/**
* SECTION:gtkfontchooserdialog
* @Short_description: A dialog for selecting fonts
* @Title: GtkFontChooserDialog
* @See_also: #GtkFontChooser, #GtkDialog
*
* The #GtkFontChooserDialog widget is a dialog for selecting a font.
* It implements the #GtkFontChooser interface.
*
* # GtkFontChooserDialog as GtkBuildable
*
* The GtkFontChooserDialog implementation of the #GtkBuildable
* interface exposes the buttons with the names “select_button”
* and “cancel_button”.
*/
static void gtk_font_chooser_dialog_buildable_interface_init (GtkBuildableIface *iface);
static GObject *gtk_font_chooser_dialog_buildable_get_internal_child (GtkBuildable *buildable,
GtkBuilder *builder,
const gchar *childname);
G_DEFINE_TYPE_WITH_CODE (GtkFontChooserDialog, gtk_font_chooser_dialog, GTK_TYPE_DIALOG,
G_IMPLEMENT_INTERFACE (GTK_TYPE_FONT_CHOOSER,
_gtk_font_chooser_delegate_iface_init)
G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
gtk_font_chooser_dialog_buildable_interface_init))
static GtkBuildableIface *parent_buildable_iface;
static void
gtk_font_chooser_dialog_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkFontChooserDialog *dialog = GTK_FONT_CHOOSER_DIALOG (object);
switch (prop_id)
{
default:
g_object_set_property (G_OBJECT (dialog->fontchooser), pspec->name, value);
break;
}
}
static void
gtk_font_chooser_dialog_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkFontChooserDialog *dialog = GTK_FONT_CHOOSER_DIALOG (object);
switch (prop_id)
{
default:
g_object_get_property (G_OBJECT (dialog->fontchooser), pspec->name, value);
break;
}
}
static void
font_activated_cb (GtkFontChooser *fontchooser,
const gchar *fontname,
gpointer user_data)
{
GtkDialog *dialog = user_data;
gtk_dialog_response (dialog, GTK_RESPONSE_OK);
}
static gboolean
dialog_forward_key (GtkEventControllerKey *controller,
guint keyval,
guint keycode,
GdkModifierType modifiers,
GtkWidget *widget)
{
GtkFontChooserDialog *dialog = GTK_FONT_CHOOSER_DIALOG (widget);
return gtk_event_controller_key_forward (controller, dialog->fontchooser);
}
static void
update_tweak_button (GtkFontChooserDialog *dialog)
{
GtkFontChooserLevel level;
if (!dialog->tweak_button)
return;
g_object_get (dialog->fontchooser, "level", &level, NULL);
if ((level & (GTK_FONT_CHOOSER_LEVEL_FEATURES | GTK_FONT_CHOOSER_LEVEL_VARIATIONS)) != 0)
gtk_widget_show (dialog->tweak_button);
else
gtk_widget_hide (dialog->tweak_button);
}
static void
setup_tweak_button (GtkFontChooserDialog *dialog)
{
gboolean use_header;
if (dialog->tweak_button)
return;
g_object_get (dialog, "use-header-bar", &use_header, NULL);
if (use_header)
{
GtkWidget *button;
GtkWidget *header;
GActionGroup *actions;
actions = G_ACTION_GROUP (g_simple_action_group_new ());
g_action_map_add_action (G_ACTION_MAP (actions), gtk_font_chooser_widget_get_tweak_action (dialog->fontchooser));
gtk_widget_insert_action_group (GTK_WIDGET (dialog), "font", actions);
g_object_unref (actions);
button = gtk_toggle_button_new ();
gtk_actionable_set_action_name (GTK_ACTIONABLE (button), "font.tweak");
gtk_widget_set_focus_on_click (button, FALSE);
gtk_widget_set_valign (button, GTK_ALIGN_CENTER);
gtk_button_set_icon_name (GTK_BUTTON (button), "emblem-system-symbolic");
header = gtk_dialog_get_header_bar (GTK_DIALOG (dialog));
gtk_header_bar_pack_end (GTK_HEADER_BAR (header), button);
dialog->tweak_button = button;
}
}
static void
gtk_font_chooser_dialog_map (GtkWidget *widget)
{
GtkFontChooserDialog *dialog = GTK_FONT_CHOOSER_DIALOG (widget);
setup_tweak_button (dialog);
GTK_WIDGET_CLASS (gtk_font_chooser_dialog_parent_class)->map (widget);
}
static void
update_button (GtkFontChooserDialog *dialog)
{
PangoFontDescription *desc;
desc = gtk_font_chooser_get_font_desc (GTK_FONT_CHOOSER (dialog->fontchooser));
gtk_widget_set_sensitive (dialog->select_button, desc != NULL);
if (desc)
pango_font_description_free (desc);
}
static void
gtk_font_chooser_dialog_dispose (GObject *object)
{
GtkFontChooserDialog *dialog = GTK_FONT_CHOOSER_DIALOG (object);
if (dialog->fontchooser)
{
g_signal_handlers_disconnect_by_func (dialog->fontchooser,
update_button,
dialog);
g_signal_handlers_disconnect_by_func (dialog->fontchooser,
update_tweak_button,
dialog);
}
g_clear_pointer (&dialog->select_button, gtk_widget_unparent);
g_clear_pointer (&dialog->cancel_button, gtk_widget_unparent);
g_clear_pointer (&dialog->tweak_button, gtk_widget_unparent);
g_clear_pointer (&dialog->fontchooser, gtk_widget_unparent);
G_OBJECT_CLASS (gtk_font_chooser_dialog_parent_class)->dispose (object);
}
static void
gtk_font_chooser_dialog_class_init (GtkFontChooserDialogClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
gobject_class->dispose = gtk_font_chooser_dialog_dispose;
gobject_class->get_property = gtk_font_chooser_dialog_get_property;
gobject_class->set_property = gtk_font_chooser_dialog_set_property;
widget_class->map = gtk_font_chooser_dialog_map;
_gtk_font_chooser_install_properties (gobject_class);
/* Bind class to template
*/
gtk_widget_class_set_template_from_resource (widget_class,
"/org/gtk/libgtk/ui/gtkfontchooserdialog.ui");
gtk_widget_class_bind_template_child (widget_class, GtkFontChooserDialog, fontchooser);
gtk_widget_class_bind_template_child (widget_class, GtkFontChooserDialog, select_button);
gtk_widget_class_bind_template_child (widget_class, GtkFontChooserDialog, cancel_button);
gtk_widget_class_bind_template_callback (widget_class, font_activated_cb);
gtk_widget_class_bind_template_callback (widget_class, dialog_forward_key);
}
static void
gtk_font_chooser_dialog_init (GtkFontChooserDialog *dialog)
{
gtk_widget_init_template (GTK_WIDGET (dialog));
gtk_dialog_set_use_header_bar_from_setting (GTK_DIALOG (dialog));
_gtk_font_chooser_set_delegate (GTK_FONT_CHOOSER (dialog),
GTK_FONT_CHOOSER (dialog->fontchooser));
g_signal_connect_swapped (dialog->fontchooser, "notify::font-desc",
G_CALLBACK (update_button), dialog);
update_button (dialog);
g_signal_connect_swapped (dialog->fontchooser, "notify::level",
G_CALLBACK (update_tweak_button), dialog);
}
/**
* gtk_font_chooser_dialog_new:
* @title: (allow-none): Title of the dialog, or %NULL
* @parent: (allow-none): Transient parent of the dialog, or %NULL
*
* Creates a new #GtkFontChooserDialog.
*
* Returns: a new #GtkFontChooserDialog
*/
GtkWidget*
gtk_font_chooser_dialog_new (const gchar *title,
GtkWindow *parent)
{
GtkFontChooserDialog *dialog;
dialog = g_object_new (GTK_TYPE_FONT_CHOOSER_DIALOG,
"title", title,
"transient-for", parent,
NULL);
return GTK_WIDGET (dialog);
}
static void
gtk_font_chooser_dialog_buildable_interface_init (GtkBuildableIface *iface)
{
parent_buildable_iface = g_type_interface_peek_parent (iface);
iface->get_internal_child = gtk_font_chooser_dialog_buildable_get_internal_child;
}
static GObject *
gtk_font_chooser_dialog_buildable_get_internal_child (GtkBuildable *buildable,
GtkBuilder *builder,
const gchar *childname)
{
GtkFontChooserDialog *dialog = GTK_FONT_CHOOSER_DIALOG (buildable);
if (g_strcmp0 (childname, "select_button") == 0)
return G_OBJECT (dialog->select_button);
else if (g_strcmp0 (childname, "cancel_button") == 0)
return G_OBJECT (dialog->cancel_button);
return parent_buildable_iface->get_internal_child (buildable, builder, childname);
}