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132 lines
4.2 KiB
C
132 lines
4.2 KiB
C
/* CALLY - The Clutter Accessibility Implementation Library
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*
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* Copyright (C) 2010 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-clone
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* @Title: CallyClone
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* @short_description: Implementation of the ATK interfaces for a #ClutterClone
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* @see_also: #ClutterClone
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*
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* #CallyClone implements the required ATK interfaces of #ClutterClone
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*
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* In particular it sets a proper role for the clone, as just a image,
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* as it is the sanest and simplest approach.
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*/
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/* Design rationale for CallyClone:
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*
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* In the old times, it was just ClutterCloneTexture. So, from a a11y POV
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* CallyCloneTexture was just another image, like ClutterTexture, and if
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* it was a clone was irrevelant. So on cally-0.8, CallyCloneTexture
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* expose a object with role ATK_ROLE_IMAGE. But now, ClutterClone is more
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* general. You can clone any object, including groups, and made things
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* like have one text entry, and a clone with different properties in the
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* same window, updated both at once.
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*
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* The question is if the idea is have a ClutterClone as a "first-class"
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* citizen inside the stage hierarchy (full clone), or it is just supposed
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* to be a mirror image of the original object.
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*
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* In the case of the a11y POV this would mean that if the text changes on
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* the source, the clone should emit as well the text-changing signals.
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*
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* As ClutterClone smartly just paint the same object with different
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* parameters, this would mean that it should be the cally object the one
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* that should replicate the source clutter hierarchy to do that,
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* something that just sound crazy.
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*
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* Taking into account that:
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*
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* - ClutterClone doesn't re-emit mirrored signals from the source
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* I think that likely the answer would be "yes, it is just a
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* mirrored image, not a real full clone".
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*
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* - You can't interact directly with the clone (ie: focus, and so on).
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* Its basic usage (right now) is clone textures.
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*
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* Any other solution could be overwhelming.
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*
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* I think that the final solution would be that ClutterClone from the
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* a11y POV should still be managed as a image (with the proper properties,
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* position, size, etc.).
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*/
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#include "cally-clone.h"
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#include "cally-actor-private.h"
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/* AtkObject */
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static void cally_clone_real_initialize (AtkObject *obj,
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gpointer data);
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G_DEFINE_TYPE (CallyClone, cally_clone, CALLY_TYPE_ACTOR)
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static void
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cally_clone_class_init (CallyCloneClass *klass)
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{
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/* GObjectClass *gobject_class = G_OBJECT_CLASS (klass); */
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AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
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class->initialize = cally_clone_real_initialize;
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}
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static void
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cally_clone_init (CallyClone *clone)
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{
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/* nothing to do yet */
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}
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/**
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* cally_clone_new:
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* @actor: a #ClutterActor
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*
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* Creates a new #CallyClone for the given @actor. @actor must be a
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* #ClutterClone.
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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_clone_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_CLONE (actor), NULL);
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object = g_object_new (CALLY_TYPE_CLONE, 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_clone_real_initialize (AtkObject *obj,
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gpointer data)
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{
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ATK_OBJECT_CLASS (cally_clone_parent_class)->initialize (obj, data);
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obj->role = ATK_ROLE_IMAGE;
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}
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