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Users of Clutter grabs may listen for notify::revoked changes in order to know that their grab is no longer in charge of event propagation, without the use of crossing events. Since a ClutterGrab may stay in the stack and regain effects, this notification also happens the other way around. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3420>
130 lines
3.1 KiB
C
130 lines
3.1 KiB
C
/*
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* Clutter.
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*
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* Copyright (C) 2023 Red Hat Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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* Author: Carlos Garnacho <carlosg@gnome.org>
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*/
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#include "config.h"
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#include "clutter-grab-private.h"
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#include "clutter-private.h"
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enum
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{
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PROP_0,
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PROP_REVOKED,
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N_PROPS,
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};
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static GParamSpec *props[N_PROPS] = { 0, };
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G_DEFINE_FINAL_TYPE (ClutterGrab, clutter_grab, G_TYPE_OBJECT)
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static void
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clutter_grab_dispose (GObject *object)
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{
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clutter_grab_dismiss (CLUTTER_GRAB (object));
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G_OBJECT_CLASS (clutter_grab_parent_class)->dispose (object);
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}
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static void
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clutter_grab_finalize (GObject *object)
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{
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ClutterGrab *grab = CLUTTER_GRAB (object);
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if (grab->owns_actor)
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g_clear_pointer (&grab->actor, clutter_actor_destroy);
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G_OBJECT_CLASS (clutter_grab_parent_class)->finalize (object);
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}
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static void
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clutter_grab_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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ClutterGrab *grab = CLUTTER_GRAB (object);
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switch (prop_id)
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{
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case PROP_REVOKED:
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g_value_set_boolean (value, clutter_grab_is_revoked (grab));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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clutter_grab_class_init (ClutterGrabClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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object_class->dispose = clutter_grab_dispose;
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object_class->finalize = clutter_grab_finalize;
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object_class->get_property = clutter_grab_get_property;
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props[PROP_REVOKED] =
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g_param_spec_boolean ("revoked", NULL, NULL,
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FALSE,
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G_PARAM_READABLE |
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G_PARAM_STATIC_STRINGS |
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G_PARAM_EXPLICIT_NOTIFY);
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g_object_class_install_properties (object_class, N_PROPS, props);
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}
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static void
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clutter_grab_init (ClutterGrab *grab)
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{
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}
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ClutterGrab *
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clutter_grab_new (ClutterStage *stage,
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ClutterActor *actor,
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gboolean owns_actor)
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{
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ClutterGrab *grab;
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grab = g_object_new (CLUTTER_TYPE_GRAB, NULL);
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grab->stage = stage;
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grab->actor = actor;
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if (owns_actor)
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grab->owns_actor = TRUE;
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return grab;
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}
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void
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clutter_grab_notify (ClutterGrab *grab)
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{
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g_object_notify (G_OBJECT (grab), "revoked");
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}
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gboolean
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clutter_grab_is_revoked (ClutterGrab *grab)
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{
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g_return_val_if_fail (CLUTTER_IS_GRAB (grab), FALSE);
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return grab->prev != NULL;
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}
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