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gtk2/gtk/gtklockbutton.c
Matthias Clasen e4b5e94eb9 Make accessible implementations public 
This commit exposes the get_type() functions and standard
headers for accessible implementations. This makes it possible
to derive from the GTK accessible implementations without
GType magic tricks. This is necessary, because we require the
a11y type hierarchy to be parallel to the widget type hierarchy.
So, if you derive a widget and need to adjust its a11y implementation,
you have to be able to derive its accessible implementation.

This commit probably exposes more than is absolutely necessary,
it also exposes accessibles of widgets that are unlikely candidates
for deriving from.
2012-12-27 11:23:22 -05:00

589 lines
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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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtklockbuttonprivate.h"
#include "gtkbox.h"
#include "gtkimage.h"
#include "gtklabel.h"
#include "gtksizegroup.h"
#include "gtkintl.h"
#include "a11y/gtklockbuttonaccessibleprivate.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. To obtain a PolicyKit-based
* #GPermission, use polkit_permission_new().
*
* If the user is not currently allowed to perform the action, but can obtain
* the permission, the widget looks like this
* <informalexample><inlinegraphic fileref="lockbutton-locked.png"></inlinegraphic></informalexample>
* and the user can click the button to request the permission. Depending
* on the platform, this may pop up an authentication dialog or ask the user
* to authenticate in some other way. Once the user has obtained the permission,
* the widget changes to this
* <informalexample><inlinegraphic fileref="lockbutton-unlocked.png"></inlinegraphic></informalexample>
* and the permission can be dropped again by clicking the button. If the user
* is not able to obtain the permission at all, the widget looks like this
* <informalexample><inlinegraphic fileref="lockbutton-sorry.png"></inlinegraphic></informalexample>
* If the user has the permission and cannot drop it, 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));
_gtk_lock_button_accessible_name_changed (button);
break;
case PROP_TEXT_UNLOCK:
gtk_label_set_text (GTK_LABEL (priv->label_unlock), g_value_get_string (value));
_gtk_lock_button_accessible_name_changed (button);
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);
GtkWidgetClass *widget_class = GTK_WIDGET_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));
gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_LOCK_BUTTON_ACCESSIBLE);
}
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);
if (gtk_widget_get_visible (priv->label_lock) != allowed)
{
gtk_widget_set_visible (priv->label_lock, allowed);
gtk_widget_set_visible (priv->label_unlock, !allowed);
_gtk_lock_button_accessible_name_changed (button);
}
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: (transfer none): 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");
}
}
const char *
_gtk_lock_button_get_current_text (GtkLockButton *button)
{
GtkLockButtonPrivate *priv;
g_return_val_if_fail (GTK_IS_LOCK_BUTTON (button), NULL);
priv = button->priv;
if (gtk_widget_get_visible (priv->label_lock))
return gtk_label_get_text (GTK_LABEL (priv->label_lock));
else
return gtk_label_get_text (GTK_LABEL (priv->label_unlock));
}
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