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gtk2/gtk/gtklockbutton.c

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/* GTK - The GIMP Toolkit
* Copyright (C) 2010 Red Hat, Inc.
* Author: Matthias Clasen
*
* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include "gtklockbutton.h"
#include "gtkbox.h"
#include "gtkimage.h"
#include "gtklabel.h"
#include "gtksizegroup.h"
#include "gtkintl.h"
/**
* SECTION:gtklockbutton
* @title: GtkLockButton
* @short_description: A widget to unlock or lock privileged operations
*
* GtkLockButton is a widget that can be used in control panels or
* preference dialogs to allow users to obtain and revoke authorizations
* needed to operate the controls. The required authorization is represented
* by a #GPermission object. Concrete implementations of #GPermission may use
* PolicyKit or some other authorization framework.
*
* If the user lacks the authorization but authorization can be obtained
* through authentication, the widget looks like this
* <informalexample><inlinegraphic fileref="lockbutton-locked.png"></inlinegraphic></informalexample>
* and the user can click the button to obtain the authorization. Depending
* on the platform, this may pop up an authentication dialog or ask the user
* to authenticate in some other way. Once authorization is obtained, the
* widget changes to this
* <informalexample><inlinegraphic fileref="lockbutton-unlocked.png"></inlinegraphic></informalexample>
* and the authorization can be dropped by clicking the button. If the user
* is not able to obtain authorization at all, the widget looks like this
* <informalexample><inlinegraphic fileref="lockbutton-sorry.png"></inlinegraphic></informalexample>
* If the user is authorized and cannot drop the authorization, the button
* is hidden.
*
* The text (and tooltips) that are shown in the various cases can be adjusted
* with the #GtkLockButton:text-lock, #GtkLockButton:text-unlock,
* #GtkLockButton:tooltip-lock, #GtkLockButton:tooltip-unlock and
* #GtkLockButton:tooltip-not-authorized properties.
*/
struct _GtkLockButtonPrivate
{
GPermission *permission;
GCancellable *cancellable;
gchar *tooltip_lock;
gchar *tooltip_unlock;
gchar *tooltip_not_authorized;
GIcon *icon_lock;
GIcon *icon_unlock;
GtkWidget *box;
GtkWidget *image;
GtkWidget *label_lock;
GtkWidget *label_unlock;
GtkSizeGroup *label_group;
};
enum
{
PROP_0,
PROP_PERMISSION,
PROP_TEXT_LOCK,
PROP_TEXT_UNLOCK,
PROP_TOOLTIP_LOCK,
PROP_TOOLTIP_UNLOCK,
PROP_TOOLTIP_NOT_AUTHORIZED
};
static void update_state (GtkLockButton *button);
static void gtk_lock_button_clicked (GtkButton *button);
static void on_permission_changed (GPermission *permission,
GParamSpec *pspec,
gpointer user_data);
G_DEFINE_TYPE (GtkLockButton, gtk_lock_button, GTK_TYPE_BUTTON);
static void
gtk_lock_button_finalize (GObject *object)
{
GtkLockButton *button = GTK_LOCK_BUTTON (object);
GtkLockButtonPrivate *priv = button->priv;
g_free (priv->tooltip_lock);
g_free (priv->tooltip_unlock);
g_free (priv->tooltip_not_authorized);
g_object_unref (priv->icon_lock);
g_object_unref (priv->icon_unlock);
g_object_unref (priv->label_group);
if (priv->cancellable != NULL)
{
g_cancellable_cancel (priv->cancellable);
g_object_unref (priv->cancellable);
}
if (priv->permission)
{
g_signal_handlers_disconnect_by_func (priv->permission,
on_permission_changed,
button);
g_object_unref (priv->permission);
}
G_OBJECT_CLASS (gtk_lock_button_parent_class)->finalize (object);
}
static void
gtk_lock_button_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GtkLockButton *button = GTK_LOCK_BUTTON (object);
GtkLockButtonPrivate *priv = button->priv;
switch (property_id)
{
case PROP_PERMISSION:
g_value_set_object (value, priv->permission);
break;
case PROP_TEXT_LOCK:
g_value_set_string (value, gtk_label_get_text (GTK_LABEL (priv->label_lock)));
break;
case PROP_TEXT_UNLOCK:
g_value_set_string (value, gtk_label_get_text (GTK_LABEL (priv->label_unlock)));
break;
case PROP_TOOLTIP_LOCK:
g_value_set_string (value, priv->tooltip_lock);
break;
case PROP_TOOLTIP_UNLOCK:
g_value_set_string (value, priv->tooltip_unlock);
break;
case PROP_TOOLTIP_NOT_AUTHORIZED:
g_value_set_string (value, priv->tooltip_not_authorized);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gtk_lock_button_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GtkLockButton *button = GTK_LOCK_BUTTON (object);
GtkLockButtonPrivate *priv = button->priv;
switch (property_id)
{
case PROP_PERMISSION:
gtk_lock_button_set_permission (button, g_value_get_object (value));
break;
case PROP_TEXT_LOCK:
gtk_label_set_text (GTK_LABEL (priv->label_lock), g_value_get_string (value));
break;
case PROP_TEXT_UNLOCK:
gtk_label_set_text (GTK_LABEL (priv->label_unlock), g_value_get_string (value));
break;
case PROP_TOOLTIP_LOCK:
g_free (priv->tooltip_lock);
priv->tooltip_lock = g_value_dup_string (value);
break;
case PROP_TOOLTIP_UNLOCK:
g_free (priv->tooltip_unlock);
priv->tooltip_unlock = g_value_dup_string (value);
break;
case PROP_TOOLTIP_NOT_AUTHORIZED:
g_free (priv->tooltip_not_authorized);
priv->tooltip_not_authorized = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
update_state (button);
}
static void
gtk_lock_button_init (GtkLockButton *button)
{
GtkLockButtonPrivate *priv;
gchar *names[3];
button->priv = priv = G_TYPE_INSTANCE_GET_PRIVATE (button,
GTK_TYPE_LOCK_BUTTON,
GtkLockButtonPrivate);
priv->label_group = gtk_size_group_new (GTK_SIZE_GROUP_BOTH);
priv->box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
gtk_widget_set_halign (priv->box, GTK_ALIGN_CENTER);
gtk_widget_set_valign (priv->box, GTK_ALIGN_CENTER);
gtk_widget_show (priv->box);
gtk_container_add (GTK_CONTAINER (button), priv->box);
priv->image = gtk_image_new ();
gtk_box_pack_start (GTK_BOX (priv->box), priv->image, FALSE, FALSE, 0);
gtk_widget_show (priv->image);
priv->label_lock = gtk_label_new ("");
gtk_misc_set_alignment (GTK_MISC (priv->label_lock), 0, 0.5);
gtk_widget_set_no_show_all (priv->label_lock, TRUE);
gtk_widget_show (priv->label_lock);
gtk_box_pack_start (GTK_BOX (priv->box), priv->label_lock, FALSE, FALSE, 0);
gtk_size_group_add_widget (priv->label_group, priv->label_lock);
priv->label_unlock = gtk_label_new ("");
gtk_misc_set_alignment (GTK_MISC (priv->label_unlock), 0, 0.5);
gtk_widget_set_no_show_all (priv->label_unlock, TRUE);
gtk_box_pack_start (GTK_BOX (priv->box), priv->label_unlock, FALSE, FALSE, 0);
gtk_size_group_add_widget (priv->label_group, priv->label_unlock);
names[0] = "changes-allow-symbolic";
names[1] = "changes-allow";
names[2] = NULL;
priv->icon_unlock = g_themed_icon_new_from_names (names, -1);
names[0] = "changes-prevent-symbolic";
names[1] = "changes-prevent";
names[2] = NULL;
priv->icon_lock = g_themed_icon_new_from_names (names, -1);
update_state (button);
}
static void
gtk_lock_button_class_init (GtkLockButtonClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GtkButtonClass *button_class = GTK_BUTTON_CLASS (klass);
gobject_class->finalize = gtk_lock_button_finalize;
gobject_class->get_property = gtk_lock_button_get_property;
gobject_class->set_property = gtk_lock_button_set_property;
button_class->clicked = gtk_lock_button_clicked;
g_type_class_add_private (klass, sizeof (GtkLockButtonPrivate));
g_object_class_install_property (gobject_class, PROP_PERMISSION,
g_param_spec_object ("permission",
P_("Permission"),
P_("The GPermission object controlling this button"),
G_TYPE_PERMISSION,
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_TEXT_LOCK,
g_param_spec_string ("text-lock",
P_("Lock Text"),
P_("The text to display when prompting the user to lock"),
_("Lock"),
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT |
G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_TEXT_UNLOCK,
g_param_spec_string ("text-unlock",
P_("Unlock Text"),
P_("The text to display when prompting the user to unlock"),
_("Unlock"),
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT |
G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_TOOLTIP_LOCK,
g_param_spec_string ("tooltip-lock",
P_("Lock Tooltip"),
P_("The tooltip to display when prompting the user to lock"),
_("Dialog is unlocked.\nClick to prevent further changes"),
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT |
G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_TOOLTIP_UNLOCK,
g_param_spec_string ("tooltip-unlock",
P_("Unlock Tooltip"),
P_("The tooltip to display when prompting the user to unlock"),
_("Dialog is locked.\nClick to make changes"),
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT |
G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_TOOLTIP_NOT_AUTHORIZED,
g_param_spec_string ("tooltip-not-authorized",
P_("Not Authorized Tooltip"),
P_("The tooltip to display when prompting the user cannot obtain authorization"),
_("System policy prevents changes.\nContact your system administrator"),
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT |
G_PARAM_STATIC_STRINGS));
}
static void
update_state (GtkLockButton *button)
{
GtkLockButtonPrivate *priv = button->priv;
gboolean allowed;
gboolean can_acquire;
gboolean can_release;
gboolean sensitive;
gboolean visible;
GIcon *icon;
const gchar *tooltip;
if (priv->permission)
{
allowed = g_permission_get_allowed (priv->permission);
can_acquire = g_permission_get_can_acquire (priv->permission);
can_release = g_permission_get_can_release (priv->permission);
}
else
{
allowed = TRUE;
can_acquire = FALSE;
can_release = FALSE;
}
if (allowed && can_release)
{
visible = TRUE;
sensitive = TRUE;
icon = priv->icon_lock;
tooltip = priv->tooltip_lock;
}
else if (allowed && !can_release)
{
visible = FALSE;
sensitive = TRUE;
icon = priv->icon_lock;
tooltip = priv->tooltip_lock;
}
else if (!allowed && can_acquire)
{
visible = TRUE;
sensitive = TRUE;
icon = priv->icon_unlock;
tooltip = priv->tooltip_unlock;
}
else if (!allowed && !can_acquire)
{
visible = TRUE;
sensitive = FALSE;
icon = priv->icon_unlock;
tooltip = priv->tooltip_not_authorized;
}
else
{
g_assert_not_reached ();
}
gtk_image_set_from_gicon (GTK_IMAGE (priv->image), icon, GTK_ICON_SIZE_MENU);
gtk_widget_set_visible (priv->label_lock, allowed);
gtk_widget_set_visible (priv->label_unlock, !allowed);
gtk_widget_set_tooltip_markup (GTK_WIDGET (button), tooltip);
gtk_widget_set_sensitive (GTK_WIDGET (button), sensitive);
gtk_widget_set_visible (GTK_WIDGET (button), visible);
}
static void
on_permission_changed (GPermission *permission,
GParamSpec *pspec,
gpointer user_data)
{
GtkLockButton *button = GTK_LOCK_BUTTON (user_data);
update_state (button);
}
static void
acquire_cb (GObject *source,
GAsyncResult *result,
gpointer user_data)
{
GtkLockButton *button = GTK_LOCK_BUTTON (user_data);
GtkLockButtonPrivate *priv = button->priv;
GError *error;
error = NULL;
if (!g_permission_acquire_finish (priv->permission, result, &error))
{
g_warning ("Error acquiring permission: %s", error->message);
g_error_free (error);
}
g_object_unref (priv->cancellable);
priv->cancellable = NULL;
update_state (button);
}
static void
release_cb (GObject *source,
GAsyncResult *result,
gpointer user_data)
{
GtkLockButton *button = GTK_LOCK_BUTTON (user_data);
GtkLockButtonPrivate *priv = button->priv;
GError *error;
error = NULL;
if (!g_permission_release_finish (priv->permission, result, &error))
{
g_warning ("Error releasing permission: %s", error->message);
g_error_free (error);
}
g_object_unref (priv->cancellable);
priv->cancellable = NULL;
update_state (button);
}
static void
gtk_lock_button_clicked (GtkButton *button)
{
GtkLockButtonPrivate *priv = GTK_LOCK_BUTTON (button)->priv;
/* if we already have a pending interactive check, then do nothing */
if (priv->cancellable != NULL)
return;
if (g_permission_get_allowed (priv->permission))
{
if (g_permission_get_can_release (priv->permission))
{
priv->cancellable = g_cancellable_new ();
g_permission_release_async (priv->permission,
priv->cancellable,
release_cb,
button);
}
}
else
{
if (g_permission_get_can_acquire (priv->permission))
{
priv->cancellable = g_cancellable_new ();
g_permission_acquire_async (priv->permission,
priv->cancellable,
acquire_cb,
button);
}
}
}
/**
* gtk_lock_button_new:
* @permission: (allow-none): a #GPermission
*
* Creates a new lock button which reflects the @permission.
*
* Returns: a new #GtkLockButton
*
* Since: 3.2
*/
GtkWidget *
gtk_lock_button_new (GPermission *permission)
{
return GTK_WIDGET (g_object_new (GTK_TYPE_LOCK_BUTTON,
"permission", permission,
NULL));
}
/**
* gtk_lock_button_get_permission:
* @button: a #GtkLockButton
*
* Obtains the #GPermission object that controls @button.
*
* Returns: the #GPermission of @button
*
* Since: 3.2
*/
GPermission *
gtk_lock_button_get_permission (GtkLockButton *button)
{
g_return_val_if_fail (GTK_IS_LOCK_BUTTON (button), NULL);
return button->priv->permission;
}
/**
* gtk_lock_button_set_permission:
* @button: a #GtkLockButton
* @permission: (allow-none): a #GPermission object, or %NULL
*
* Sets the #GPermission object that controls @button.
*
* Since: 3.2
*/
void
gtk_lock_button_set_permission (GtkLockButton *button,
GPermission *permission)
{
GtkLockButtonPrivate *priv;
g_return_if_fail (GTK_IS_LOCK_BUTTON (button));
g_return_if_fail (permission == NULL || G_IS_PERMISSION (permission));
priv = button->priv;
if (priv->permission != permission)
{
if (priv->permission)
{
g_signal_handlers_disconnect_by_func (priv->permission,
on_permission_changed,
button);
g_object_unref (priv->permission);
}
priv->permission = permission;
if (priv->permission)
{
g_object_ref (priv->permission);
g_signal_connect (priv->permission, "notify",
G_CALLBACK (on_permission_changed), button);
}
update_state (button);
g_object_notify (G_OBJECT (button), "permission");
}
}
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