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92af3d04b8
gtk3/gtk/gtkapplication.c
Matthias Clasen 92af3d04b8 GtkApplication: use activate for actions here, too
2011-12-19 12:45:51 -05:00

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/*
* Copyright © 2010 Codethink Limited
*
* 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 licence, 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Author: Ryan Lortie <desrt@desrt.ca>
*/
#include "config.h"
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <string.h>
#include "gtkapplication.h"
#include "gtkmarshalers.h"
#include "gtkmain.h"
#include "gtkwindow.h"
#include "gtkcheckmenuitem.h"
#include "gtkseparatormenuitem.h"
#include "gtkmenu.h"
#include <gdk/gdk.h>
#ifdef GDK_WINDOWING_X11
#include <gdk/x11/gdkx.h>
#endif
/**
* SECTION:gtkapplication
* @title: GtkApplication
* @short_description: Application class
*
* #GtkApplication is a class that handles many important aspects
* of a GTK+ application in a convenient fashion, without enforcing
* a one-size-fits-all application model.
*
* Currently, GtkApplication handles GTK+ initialization, application
* uniqueness, provides some basic scriptability by exporting 'actions',
* and manages a list of toplevel windows whose life-cycle is automatically
* tied to the life-cycle of your application.
*
* <example id="gtkapplication"><title>A simple application</title>
* <programlisting>
* <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../examples/bloatpad.c">
* <xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback>
* </xi:include>
* </programlisting>
* </example>
*/
enum {
WINDOW_ADDED,
WINDOW_REMOVED,
LAST_SIGNAL
};
static guint gtk_application_signals[LAST_SIGNAL];
G_DEFINE_TYPE (GtkApplication, gtk_application, G_TYPE_APPLICATION)
struct _GtkApplicationPrivate
{
GList *windows;
};
static gboolean
gtk_application_focus_in_event_cb (GtkWindow *window,
GdkEventFocus *event,
GtkApplication *application)
{
GtkApplicationPrivate *priv = application->priv;
GList *link;
/* Keep the window list sorted by most-recently-focused. */
link = g_list_find (priv->windows, window);
if (link != NULL && link != priv->windows)
{
priv->windows = g_list_remove_link (priv->windows, link);
priv->windows = g_list_concat (link, priv->windows);
}
return FALSE;
}
static void
gtk_application_startup (GApplication *application)
{
G_APPLICATION_CLASS (gtk_application_parent_class)
->startup (application);
gtk_init (0, 0);
}
static void
gtk_application_add_platform_data (GApplication *application,
GVariantBuilder *builder)
{
const gchar *startup_id;
startup_id = getenv ("DESKTOP_STARTUP_ID");
if (startup_id && g_utf8_validate (startup_id, -1, NULL))
g_variant_builder_add (builder, "{sv}", "desktop-startup-id",
g_variant_new_string (startup_id));
}
static void
gtk_application_before_emit (GApplication *application,
GVariant *platform_data)
{
GVariantIter iter;
const gchar *key;
GVariant *value;
g_variant_iter_init (&iter, platform_data);
while (g_variant_iter_loop (&iter, "{&sv}", &key, &value))
{
#ifdef GDK_WINDOWING_X11
if (strcmp (key, "desktop-startup-id") == 0)
{
GdkDisplay *display;
const gchar *id;
display = gdk_display_get_default ();
id = g_variant_get_string (value, NULL);
gdk_x11_display_set_startup_notification_id (display, id);
}
#endif
}
}
static void
gtk_application_after_emit (GApplication *application,
GVariant *platform_data)
{
gdk_notify_startup_complete ();
}
static void
gtk_application_init (GtkApplication *application)
{
application->priv = G_TYPE_INSTANCE_GET_PRIVATE (application,
GTK_TYPE_APPLICATION,
GtkApplicationPrivate);
}
static void
gtk_application_window_added (GtkApplication *application,
GtkWindow *window)
{
GtkApplicationPrivate *priv = application->priv;
priv->windows = g_list_prepend (priv->windows, window);
gtk_window_set_application (window, application);
g_application_hold (G_APPLICATION (application));
g_signal_connect (window, "focus-in-event",
G_CALLBACK (gtk_application_focus_in_event_cb),
application);
}
static void
gtk_application_window_removed (GtkApplication *application,
GtkWindow *window)
{
GtkApplicationPrivate *priv = application->priv;
g_signal_handlers_disconnect_by_func (window,
gtk_application_focus_in_event_cb,
application);
g_application_release (G_APPLICATION (application));
priv->windows = g_list_remove (priv->windows, window);
gtk_window_set_application (window, NULL);
}
static void
gtk_application_class_init (GtkApplicationClass *class)
{
GApplicationClass *application_class = G_APPLICATION_CLASS (class);
application_class->add_platform_data = gtk_application_add_platform_data;
application_class->before_emit = gtk_application_before_emit;
application_class->after_emit = gtk_application_after_emit;
application_class->startup = gtk_application_startup;
class->window_added = gtk_application_window_added;
class->window_removed = gtk_application_window_removed;
g_type_class_add_private (class, sizeof (GtkApplicationPrivate));
/**
* GtkApplication::window-added:
* @application: the #GtkApplication which emitted the signal
* @window: the newly-added #GtkWindow
*
* Emitted when a #GtkWindow is added to @application through
* gtk_application_add_window().
*
* Since: 3.2
*/
gtk_application_signals[WINDOW_ADDED] =
g_signal_new ("window-added", GTK_TYPE_APPLICATION, G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkApplicationClass, window_added),
NULL, NULL,
g_cclosure_marshal_VOID__OBJECT,
G_TYPE_NONE, 1, GTK_TYPE_WINDOW);
/**
* GtkApplication::window-removed:
* @application: the #GtkApplication which emitted the signal
* @window: the #GtkWindow that is being removed
*
* Emitted when a #GtkWindow is removed from @application,
* either as a side-effect of being destroyed or explicitly
* through gtk_application_remove_window().
*
* Since: 3.2
*/
gtk_application_signals[WINDOW_REMOVED] =
g_signal_new ("window-removed", GTK_TYPE_APPLICATION, G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkApplicationClass, window_removed),
NULL, NULL,
g_cclosure_marshal_VOID__OBJECT,
G_TYPE_NONE, 1, GTK_TYPE_WINDOW);
}
/**
* gtk_application_new:
* @application_id: the application id
* @flags: the application flags
*
* Creates a new #GtkApplication instance.
*
* This function calls g_type_init() for you. gtk_init() is called
* as soon as the application gets registered as the primary instance.
*
* The application id must be valid. See g_application_id_is_valid().
*
* Returns: a new #GtkApplication instance
*/
GtkApplication *
gtk_application_new (const gchar *application_id,
GApplicationFlags flags)
{
g_return_val_if_fail (g_application_id_is_valid (application_id), NULL);
g_type_init ();
return g_object_new (GTK_TYPE_APPLICATION,
"application-id", application_id,
"flags", flags,
NULL);
}
/**
* gtk_application_add_window:
* @application: a #GtkApplication
* @window: a #GtkWindow
*
* Adds a window from @application.
*
* This call is equivalent to setting the #GtkWindow:application
* property of @window to @application.
*
* Normally, the connection between the application and the window
* will remain until the window is destroyed, but you can explicitly
* remove it with gtk_application_remove_window().
*
* GTK+ will keep the application running as long as it has
* any windows.
*
* Since: 3.0
**/
void
gtk_application_add_window (GtkApplication *application,
GtkWindow *window)
{
g_return_if_fail (GTK_IS_APPLICATION (application));
if (!g_list_find (application->priv->windows, window))
g_signal_emit (application,
gtk_application_signals[WINDOW_ADDED], 0, window);
}
/**
* gtk_application_remove_window:
* @application: a #GtkApplication
* @window: a #GtkWindow
*
* Remove a window from @application.
*
* If @window belongs to @application then this call is equivalent to
* setting the #GtkWindow:application property of @window to
* %NULL.
*
* The application may stop running as a result of a call to this
* function.
*
* Since: 3.0
**/
void
gtk_application_remove_window (GtkApplication *application,
GtkWindow *window)
{
g_return_if_fail (GTK_IS_APPLICATION (application));
if (g_list_find (application->priv->windows, window))
g_signal_emit (application,
gtk_application_signals[WINDOW_REMOVED], 0, window);
}
/**
* gtk_application_get_windows:
* @application: a #GtkApplication
*
* Gets a list of the #GtkWindow<!-- -->s associated with @application.
*
* The list is sorted by most recently focused window, such that the first
* element is the currently focused window. (Useful for choosing a parent
* for a transient window.)
*
* The list that is returned should not be modified in any way. It will
* only remain valid until the next focus change or window creation or
* deletion.
*
* Returns: (element-type GtkWindow) (transfer none): a #GList of #GtkWindow
*
* Since: 3.0
**/
GList *
gtk_application_get_windows (GtkApplication *application)
{
g_return_val_if_fail (GTK_IS_APPLICATION (application), NULL);
return application->priv->windows;
}
/* GtkMenu construction {{{1 */
typedef struct {
GActionGroup *group;
gchar *name;
gchar *target;
gulong enabled_changed_id;
gulong state_changed_id;
gulong activate_handler;
} ActionData;
static void
action_data_free (gpointer data)
{
ActionData *a = data;
if (a->enabled_changed_id)
g_signal_handler_disconnect (a->group, a->enabled_changed_id);
if (a->state_changed_id)
g_signal_handler_disconnect (a->group, a->state_changed_id);
g_object_unref (a->group);
g_free (a->name);
g_free (a->target);
g_free (a);
}
static void
enabled_changed (GActionGroup *group,
const gchar *action_name,
gboolean enabled,
GtkWidget *widget)
{
gtk_widget_set_sensitive (widget, enabled);
}
static void
item_activated (GtkWidget *w,
gpointer data)
{
ActionData *a;
GVariant *parameter;
a = g_object_get_data (G_OBJECT (w), "action");
if (a->target)
parameter = g_variant_ref_sink (g_variant_new_string (a->target));
else
parameter = NULL;
g_action_group_activate_action (a->group, a->name, parameter);
if (parameter)
g_variant_unref (parameter);
}
static void
toggle_state_changed (GActionGroup *group,
const gchar *name,
GVariant *state,
GtkCheckMenuItem *w)
{
ActionData *a;
a = g_object_get_data (G_OBJECT (w), "action");
g_signal_handler_block (w, a->activate_handler);
gtk_check_menu_item_set_active (w, g_variant_get_boolean (state));
g_signal_handler_unblock (w, a->activate_handler);
}
static void
radio_state_changed (GActionGroup *group,
const gchar *name,
GVariant *state,
GtkCheckMenuItem *w)
{
ActionData *a;
gboolean b;
a = g_object_get_data (G_OBJECT (w), "action");
g_signal_handler_block (w, a->activate_handler);
b = g_strcmp0 (a->target, g_variant_get_string (state, NULL)) == 0;
gtk_check_menu_item_set_active (w, b);
g_signal_handler_unblock (w, a->activate_handler);
}
static GtkWidget *
create_menuitem_from_model (GMenuModel *model,
gint item,
GActionGroup *group)
{
GtkWidget *w;
gchar *label;
gchar *action;
gchar *target;
gchar *s;
ActionData *a;
const GVariantType *type;
GVariant *v;
g_menu_model_get_item_attribute (model, item, G_MENU_ATTRIBUTE_LABEL, "s", &label);
action = NULL;
g_menu_model_get_item_attribute (model, item, G_MENU_ATTRIBUTE_ACTION, "s", &action);
if (action != NULL)
type = g_action_group_get_action_state_type (group, action);
else
type = NULL;
if (type == NULL)
w = gtk_menu_item_new_with_mnemonic (label);
else if (g_variant_type_equal (type, G_VARIANT_TYPE_BOOLEAN))
w = gtk_check_menu_item_new_with_label (label);
else if (g_variant_type_equal (type, G_VARIANT_TYPE_STRING))
{
w = gtk_check_menu_item_new_with_label (label);
gtk_check_menu_item_set_draw_as_radio (GTK_CHECK_MENU_ITEM (w), TRUE);
}
else
g_assert_not_reached ();
if (action != NULL)
{
a = g_new0 (ActionData, 1);
a->group = g_object_ref (group);
a->name = g_strdup (action);
g_object_set_data_full (G_OBJECT (w), "action", a, action_data_free);
if (!g_action_group_get_action_enabled (group, action))
gtk_widget_set_sensitive (w, FALSE);
s = g_strconcat ("action-enabled-changed::", action, NULL);
a->enabled_changed_id = g_signal_connect (group, s,
G_CALLBACK (enabled_changed), w);
g_free (s);
a->activate_handler = g_signal_connect (w, "activate",
G_CALLBACK (item_activated), NULL);
if (type == NULL)
{
/* all set */
}
else if (g_variant_type_equal (type, G_VARIANT_TYPE_BOOLEAN))
{
s = g_strconcat ("action-state-changed::", action, NULL);
a->state_changed_id = g_signal_connect (group, s,
G_CALLBACK (toggle_state_changed), w);
g_free (s);
v = g_action_group_get_action_state (group, action);
gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (w),
g_variant_get_boolean (v));
g_variant_unref (v);
}
else if (g_variant_type_equal (type, G_VARIANT_TYPE_STRING))
{
s = g_strconcat ("action-state-changed::", action, NULL);
a->state_changed_id = g_signal_connect (group, s,
G_CALLBACK (radio_state_changed), w);
g_free (s);
g_menu_model_get_item_attribute (model, item, G_MENU_ATTRIBUTE_TARGET, "s", &target);
a->target = g_strdup (target);
v = g_action_group_get_action_state (group, action);
gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (w),
g_strcmp0 (g_variant_get_string (v, NULL), target) == 0);
g_variant_unref (v);
g_free (target);
}
else
g_assert_not_reached ();
}
g_free (label);
g_free (action);
return w;
}
static void populate_menu_from_model (GtkMenuShell *menu,
GMenuModel *model,
GActionGroup *group);
static void
append_items_from_model (GtkMenuShell *menu,
GMenuModel *model,
GActionGroup *group,
gboolean *need_separator)
{
gint n;
gint i;
GtkWidget *w;
GtkWidget *menuitem;
GtkWidget *submenu;
GMenuModel *m;
n = g_menu_model_get_n_items (model);
if (*need_separator && n > 0)
{
w = gtk_separator_menu_item_new ();
gtk_widget_show (w);
gtk_menu_shell_append (menu, w);
*need_separator = FALSE;
}
for (i = 0; i < n; i++)
{
if ((m = g_menu_model_get_item_link (model, i, G_MENU_LINK_SECTION)))
{
append_items_from_model (menu, m, group, need_separator);
g_object_unref (m);
continue;
}
menuitem = create_menuitem_from_model (model, i, group);
if ((m = g_menu_model_get_item_link (model, i, G_MENU_LINK_SUBMENU)))
{
submenu = gtk_menu_new ();
populate_menu_from_model (GTK_MENU_SHELL (submenu), m, group);
gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), submenu);
g_object_unref (m);
}
gtk_widget_show (menuitem);
gtk_menu_shell_append (menu, menuitem);
*need_separator = TRUE;
}
}
static void
populate_menu_from_model (GtkMenuShell *menu,
GMenuModel *model,
GActionGroup *group)
{
gboolean need_separator;
need_separator = FALSE;
append_items_from_model (menu, model, group, &need_separator);
}
typedef struct {
GtkApplication *application;
GtkMenuShell *menu;
guint update_idle;
GHashTable *connected;
} ItemsChangedData;
static void
free_items_changed_data (gpointer data)
{
ItemsChangedData *d = data;
g_object_unref (d->application);
if (d->update_idle != 0)
g_source_remove (d->update_idle);
g_hash_table_unref (d->connected);
g_free (d);
}
static gboolean
repopulate_menu (gpointer data)
{
ItemsChangedData *d = data;
GList *children, *l;
GtkWidget *child;
GMenuModel *model;
/* remove current children */
children = gtk_container_get_children (GTK_CONTAINER (d->menu));
for (l = children; l; l = l->next)
{
child = l->data;
gtk_container_remove (GTK_CONTAINER (d->menu), child);
}
g_list_free (children);
/* repopulate */
model = g_application_get_menu (G_APPLICATION (d->application));
populate_menu_from_model (d->menu, model, G_ACTION_GROUP (d->application));
d->update_idle = 0;
return FALSE;
}
static void
connect_to_items_changed (GMenuModel *model,
GCallback callback,
gpointer data)
{
ItemsChangedData *d = data;
gint i;
GMenuModel *m;
GMenuLinkIter *iter;
if (!g_hash_table_lookup (d->connected, model))
{
g_signal_connect (model, "items-changed", callback, data);
g_hash_table_insert (d->connected, model, model);
}
for (i = 0; i < g_menu_model_get_n_items (model); i++)
{
iter = g_menu_model_iterate_item_links (model, i);
while (g_menu_link_iter_next (iter))
{
m = g_menu_link_iter_get_value (iter);
connect_to_items_changed (m, callback, data);
g_object_unref (m);
}
g_object_unref (iter);
}
}
static void
items_changed (GMenuModel *model,
gint position,
gint removed,
gint added,
gpointer data)
{
ItemsChangedData *d = data;
if (d->update_idle == 0)
d->update_idle = gdk_threads_add_idle (repopulate_menu, data);
connect_to_items_changed (model, G_CALLBACK (items_changed), data);
}
/**
* gtk_application_get_menu:
* @application: a #GtkApplication
*
* Populates a menu widget from a menu model that is
* associated with @application. See g_application_set_menu().
* The menu items will be connected to action of @application,
* as indicated by the menu model. The menus contents will be
* updated automatically in response to menu model changes.
*
* It is the callers responsibility to add the menu at a
* suitable place in the widget hierarchy.
*
* This function returns %NULL if @application has no associated
* menu model. It also returns %NULL if the menu model is
* represented outside the application, e.g. by an application
* menu in the desktop shell.
*
* @menu may be a #GtkMenu or a #GtkMenuBar.
*
* Returns: A #GtkMenu that has been populated from the
* #GMenuModel that is associated with @application,
* or %NULL
*/
GtkMenu *
gtk_application_get_menu (GtkApplication *application)
{
GtkWidget *menu;
GMenuModel *model;
ItemsChangedData *data;
model = g_application_get_menu (G_APPLICATION (application));
if (!model)
return NULL;
/* FIXME: find out if external menu is available. If yes, return NULL */
menu = gtk_menu_new ();
populate_menu_from_model (GTK_MENU_SHELL (menu), model, G_ACTION_GROUP (application));
data = g_new (ItemsChangedData, 1);
data->application = g_object_ref (application);
data->menu = GTK_MENU_SHELL (menu);
data->update_idle = 0;
data->connected = g_hash_table_new (NULL, NULL);
g_object_set_data_full (G_OBJECT (menu), "gtk-application-menu-data",
data, free_items_changed_data);
connect_to_items_changed (model, G_CALLBACK (items_changed), data);
return GTK_MENU (menu);
}
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