261 lines
7.5 KiB
C
261 lines
7.5 KiB
C
/* CALLY - The Clutter Accessibility Implementation Library
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*
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* Copyright (C) 2008 Igalia, S.L.
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*
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* Author: Alejandro Piñeiro Iglesias <apinheiro@igalia.com>
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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, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:cally-stage
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* @Title: CallyStage
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* @short_description: Implementation of the ATK interfaces for a #ClutterStage
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* @see_also: #ClutterStage
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*
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* #CallyStage implements the required ATK interfaces for #ClutterStage
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*
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* Some implementation details: at this moment #CallyStage is used as
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* the most similar Window object in this toolkit (ie: emitting window
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* related signals), although the real purpose of #ClutterStage is
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* being a canvas. Anyway, this is required for applications using
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* just clutter, or directly #ClutterStage
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*/
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#include "config.h"
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#include "cally-stage.h"
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#include "cally-actor-private.h"
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/* AtkObject.h */
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static void cally_stage_real_initialize (AtkObject *obj,
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gpointer data);
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static AtkStateSet* cally_stage_ref_state_set (AtkObject *obj);
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/* AtkWindow */
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static void cally_stage_window_interface_init (AtkWindowIface *iface);
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/* Auxiliar */
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static void cally_stage_activate_cb (ClutterStage *stage,
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gpointer data);
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static void cally_stage_deactivate_cb (ClutterStage *stage,
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gpointer data);
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struct _CallyStagePrivate
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{
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/* NULL means that the stage will receive the focus */
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ClutterActor *key_focus;
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gboolean active;
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};
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G_DEFINE_TYPE_WITH_CODE (CallyStage,
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cally_stage,
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CALLY_TYPE_GROUP,
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G_ADD_PRIVATE (CallyStage)
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G_IMPLEMENT_INTERFACE (ATK_TYPE_WINDOW,
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cally_stage_window_interface_init));
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static void
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cally_stage_class_init (CallyStageClass *klass)
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{
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AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
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/* AtkObject */
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class->initialize = cally_stage_real_initialize;
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class->ref_state_set = cally_stage_ref_state_set;
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}
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static void
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cally_stage_init (CallyStage *cally_stage)
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{
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CallyStagePrivate *priv = cally_stage_get_instance_private (cally_stage);
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cally_stage->priv = priv;
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priv->active = FALSE;
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}
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/**
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* cally_stage_new:
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* @actor: a #ClutterActor
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*
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* Creates a new #CallyStage for the given @actor. @actor should be a
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* #ClutterStage.
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*
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* Return value: the newly created #AtkObject
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*
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* Since: 1.4
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*/
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AtkObject*
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cally_stage_new (ClutterActor *actor)
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{
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GObject *object = NULL;
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AtkObject *accessible = NULL;
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g_return_val_if_fail (CLUTTER_IS_STAGE (actor), NULL);
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object = g_object_new (CALLY_TYPE_STAGE, NULL);
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accessible = ATK_OBJECT (object);
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atk_object_initialize (accessible, actor);
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return accessible;
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}
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static void
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cally_stage_notify_key_focus_cb (ClutterStage *stage,
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GParamSpec *pspec,
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CallyStage *self)
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{
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ClutterActor *key_focus = NULL;
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AtkObject *new = NULL;
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if (self->priv->active == FALSE)
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return;
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key_focus = clutter_stage_get_key_focus (stage);
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if (key_focus != self->priv->key_focus)
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{
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AtkObject *old = NULL;
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if (self->priv->key_focus != NULL)
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{
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g_object_remove_weak_pointer (G_OBJECT (self->priv->key_focus),
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(gpointer *) &self->priv->key_focus);
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old = clutter_actor_get_accessible (self->priv->key_focus);
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}
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else
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old = clutter_actor_get_accessible (CLUTTER_ACTOR (stage));
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atk_object_notify_state_change (old,
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ATK_STATE_FOCUSED,
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FALSE);
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}
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/* we keep notifying the focus gain without checking previous
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* key-focus to avoid some missing events due timing
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*/
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self->priv->key_focus = key_focus;
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if (key_focus != NULL)
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{
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/* ensure that if the key focus goes away, the field inside
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* CallyStage is reset. see bug:
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*
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* https://bugzilla.gnome.org/show_bug.cgi?id=692706
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*
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* we remove the weak pointer above.
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*/
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g_object_add_weak_pointer (G_OBJECT (self->priv->key_focus),
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(gpointer *) &self->priv->key_focus);
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new = clutter_actor_get_accessible (key_focus);
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}
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else
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new = clutter_actor_get_accessible (CLUTTER_ACTOR (stage));
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atk_object_notify_state_change (new,
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ATK_STATE_FOCUSED,
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TRUE);
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}
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static void
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cally_stage_real_initialize (AtkObject *obj,
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gpointer data)
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{
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ClutterStage *stage = NULL;
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g_return_if_fail (CALLY_IS_STAGE (obj));
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ATK_OBJECT_CLASS (cally_stage_parent_class)->initialize (obj, data);
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stage = CLUTTER_STAGE (CALLY_GET_CLUTTER_ACTOR (obj));
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g_signal_connect (stage, "activate", G_CALLBACK (cally_stage_activate_cb), obj);
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g_signal_connect (stage, "deactivate", G_CALLBACK (cally_stage_deactivate_cb), obj);
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g_signal_connect (stage, "notify::key-focus",
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G_CALLBACK (cally_stage_notify_key_focus_cb), obj);
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atk_object_set_role (obj, ATK_ROLE_WINDOW);
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}
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static AtkStateSet*
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cally_stage_ref_state_set (AtkObject *obj)
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{
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CallyStage *cally_stage = NULL;
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AtkStateSet *state_set = NULL;
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ClutterStage *stage = NULL;
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g_return_val_if_fail (CALLY_IS_STAGE (obj), NULL);
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cally_stage = CALLY_STAGE (obj);
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state_set = ATK_OBJECT_CLASS (cally_stage_parent_class)->ref_state_set (obj);
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stage = CLUTTER_STAGE (CALLY_GET_CLUTTER_ACTOR (cally_stage));
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if (stage == NULL)
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return state_set;
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if (cally_stage->priv->active)
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atk_state_set_add_state (state_set, ATK_STATE_ACTIVE);
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return state_set;
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}
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/* AtkWindow */
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static void
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cally_stage_window_interface_init (AtkWindowIface *iface)
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{
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/* At this moment AtkWindow is just about signals */
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}
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/* Auxiliar */
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static void
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cally_stage_activate_cb (ClutterStage *stage,
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gpointer data)
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{
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CallyStage *cally_stage = NULL;
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g_return_if_fail (CALLY_IS_STAGE (data));
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cally_stage = CALLY_STAGE (data);
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cally_stage->priv->active = TRUE;
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atk_object_notify_state_change (ATK_OBJECT (cally_stage),
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ATK_STATE_ACTIVE, TRUE);
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g_signal_emit_by_name (cally_stage, "activate", 0);
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}
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static void
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cally_stage_deactivate_cb (ClutterStage *stage,
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gpointer data)
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{
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CallyStage *cally_stage = NULL;
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g_return_if_fail (CALLY_IS_STAGE (data));
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cally_stage = CALLY_STAGE (data);
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cally_stage->priv->active = FALSE;
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atk_object_notify_state_change (ATK_OBJECT (cally_stage),
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ATK_STATE_ACTIVE, FALSE);
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g_signal_emit_by_name (cally_stage, "deactivate", 0);
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}
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