429 lines
13 KiB
C
429 lines
13 KiB
C
/* GTK+ - accessibility implementations
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* Copyright 2001 Sun Microsystems 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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#include "config.h"
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#include <gtk/gtk.h>
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#include "gtkcontainercellaccessible.h"
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#include "gtkcellaccessibleprivate.h"
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#include "gtkcellaccessibleparent.h"
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static const struct {
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AtkState atk_state;
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GtkCellRendererState renderer_state;
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gboolean invert;
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} state_map[] = {
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{ ATK_STATE_SENSITIVE, GTK_CELL_RENDERER_INSENSITIVE, TRUE },
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{ ATK_STATE_ENABLED, GTK_CELL_RENDERER_INSENSITIVE, TRUE },
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{ ATK_STATE_SELECTED, GTK_CELL_RENDERER_SELECTED, FALSE },
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/* XXX: why do we map ACTIVE here? */
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{ ATK_STATE_ACTIVE, GTK_CELL_RENDERER_FOCUSED, FALSE },
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{ ATK_STATE_FOCUSED, GTK_CELL_RENDERER_FOCUSED, FALSE },
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{ ATK_STATE_EXPANDABLE,GTK_CELL_RENDERER_EXPANDABLE, FALSE },
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{ ATK_STATE_EXPANDED, GTK_CELL_RENDERER_EXPANDED, FALSE },
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};
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static GtkCellRendererState gtk_cell_accessible_get_state (GtkCellAccessible *cell);
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static void atk_action_interface_init (AtkActionIface *iface);
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static void atk_component_interface_init (AtkComponentIface *iface);
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G_DEFINE_TYPE_WITH_CODE (GtkCellAccessible, gtk_cell_accessible, GTK_TYPE_ACCESSIBLE,
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G_IMPLEMENT_INTERFACE (ATK_TYPE_ACTION, atk_action_interface_init)
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G_IMPLEMENT_INTERFACE (ATK_TYPE_COMPONENT, atk_component_interface_init))
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static void
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gtk_cell_accessible_object_finalize (GObject *obj)
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{
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AtkRelationSet *relation_set;
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AtkRelation *relation;
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GPtrArray *target;
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gpointer target_object;
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gint i;
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relation_set = atk_object_ref_relation_set (ATK_OBJECT (obj));
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if (ATK_IS_RELATION_SET (relation_set))
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{
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relation = atk_relation_set_get_relation_by_type (relation_set,
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ATK_RELATION_NODE_CHILD_OF);
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if (relation)
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{
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target = atk_relation_get_target (relation);
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for (i = 0; i < target->len; i++)
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{
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target_object = g_ptr_array_index (target, i);
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if (GTK_IS_CELL_ACCESSIBLE (target_object))
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g_object_unref (target_object);
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}
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}
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g_object_unref (relation_set);
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}
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G_OBJECT_CLASS (gtk_cell_accessible_parent_class)->finalize (obj);
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}
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static gint
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gtk_cell_accessible_get_index_in_parent (AtkObject *obj)
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{
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GtkCellAccessible *cell;
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AtkObject *parent;
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cell = GTK_CELL_ACCESSIBLE (obj);
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parent = atk_object_get_parent (obj);
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if (GTK_IS_CONTAINER_CELL_ACCESSIBLE (parent))
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return g_list_index (gtk_container_cell_accessible_get_children (GTK_CONTAINER_CELL_ACCESSIBLE (parent)), obj);
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parent = gtk_widget_get_accessible (gtk_accessible_get_widget (GTK_ACCESSIBLE (cell)));
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if (parent == NULL)
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return -1;
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return gtk_cell_accessible_parent_get_child_index (GTK_CELL_ACCESSIBLE_PARENT (parent), cell);
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}
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static AtkStateSet *
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gtk_cell_accessible_ref_state_set (AtkObject *accessible)
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{
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GtkCellAccessible *cell_accessible;
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AtkStateSet *state_set;
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GtkCellRendererState flags;
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guint i;
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cell_accessible = GTK_CELL_ACCESSIBLE (accessible);
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state_set = atk_state_set_new ();
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if (gtk_accessible_get_widget (GTK_ACCESSIBLE (cell_accessible)) == NULL)
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{
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atk_state_set_add_state (state_set, ATK_STATE_DEFUNCT);
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return state_set;
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}
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flags = gtk_cell_accessible_get_state (cell_accessible);
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atk_state_set_add_state (state_set, ATK_STATE_FOCUSABLE);
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atk_state_set_add_state (state_set, ATK_STATE_SELECTABLE);
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atk_state_set_add_state (state_set, ATK_STATE_TRANSIENT);
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atk_state_set_add_state (state_set, ATK_STATE_VISIBLE);
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for (i = 0; i < G_N_ELEMENTS (state_map); i++)
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{
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if (flags & state_map[i].renderer_state)
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{
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if (!state_map[i].invert)
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atk_state_set_add_state (state_set, state_map[i].atk_state);
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}
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else
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{
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if (state_map[i].invert)
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atk_state_set_add_state (state_set, state_map[i].atk_state);
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}
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}
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if (gtk_widget_get_mapped (gtk_accessible_get_widget (GTK_ACCESSIBLE (cell_accessible))))
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atk_state_set_add_state (state_set, ATK_STATE_SHOWING);
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return state_set;
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}
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static void
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gtk_cell_accessible_class_init (GtkCellAccessibleClass *klass)
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{
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AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
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GObjectClass *g_object_class = G_OBJECT_CLASS (klass);
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g_object_class->finalize = gtk_cell_accessible_object_finalize;
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class->get_index_in_parent = gtk_cell_accessible_get_index_in_parent;
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class->ref_state_set = gtk_cell_accessible_ref_state_set;
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}
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static void
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gtk_cell_accessible_init (GtkCellAccessible *cell)
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{
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}
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void
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_gtk_cell_accessible_initialize (GtkCellAccessible *cell,
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GtkWidget *widget,
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AtkObject *parent)
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{
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gtk_accessible_set_widget (GTK_ACCESSIBLE (cell), widget);
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atk_object_set_parent (ATK_OBJECT (cell), parent);
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}
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gboolean
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_gtk_cell_accessible_add_state (GtkCellAccessible *cell,
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AtkStateType state_type,
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gboolean emit_signal)
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{
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AtkObject *parent;
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/* The signal should only be generated if the value changed,
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* not when the cell is set up. So states that are set
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* initially should pass FALSE as the emit_signal argument.
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*/
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if (emit_signal)
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{
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atk_object_notify_state_change (ATK_OBJECT (cell), state_type, TRUE);
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/* If state_type is ATK_STATE_VISIBLE, additional notification */
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if (state_type == ATK_STATE_VISIBLE)
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g_signal_emit_by_name (cell, "visible-data-changed");
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}
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/* If the parent is a flyweight container cell, propagate the state
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* change to it also
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*/
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parent = atk_object_get_parent (ATK_OBJECT (cell));
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if (GTK_IS_CONTAINER_CELL_ACCESSIBLE (parent))
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_gtk_cell_accessible_add_state (GTK_CELL_ACCESSIBLE (parent), state_type, emit_signal);
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return TRUE;
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}
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gboolean
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_gtk_cell_accessible_remove_state (GtkCellAccessible *cell,
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AtkStateType state_type,
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gboolean emit_signal)
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{
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AtkObject *parent;
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parent = atk_object_get_parent (ATK_OBJECT (cell));
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/* The signal should only be generated if the value changed,
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* not when the cell is set up. So states that are set
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* initially should pass FALSE as the emit_signal argument.
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*/
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if (emit_signal)
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{
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atk_object_notify_state_change (ATK_OBJECT (cell), state_type, FALSE);
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/* If state_type is ATK_STATE_VISIBLE, additional notification */
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if (state_type == ATK_STATE_VISIBLE)
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g_signal_emit_by_name (cell, "visible-data-changed");
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}
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/* If the parent is a flyweight container cell, propagate the state
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* change to it also
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*/
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if (GTK_IS_CONTAINER_CELL_ACCESSIBLE (parent))
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_gtk_cell_accessible_remove_state (GTK_CELL_ACCESSIBLE (parent), state_type, emit_signal);
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return TRUE;
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}
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static gint
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gtk_cell_accessible_action_get_n_actions (AtkAction *action)
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{
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return 3;
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}
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static const gchar *
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gtk_cell_accessible_action_get_name (AtkAction *action,
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gint index)
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{
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switch (index)
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{
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case 0:
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return "expand or contract";
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case 1:
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return "edit";
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case 2:
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return "activate";
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default:
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return NULL;
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}
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}
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static const gchar *
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gtk_cell_accessible_action_get_description (AtkAction *action,
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gint index)
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{
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switch (index)
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{
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case 0:
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return "expands or contracts the row in the tree view containing this cell";
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case 1:
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return "creates a widget in which the contents of the cell can be edited";
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case 2:
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return "activate the cell";
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default:
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return NULL;
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}
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}
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static const gchar *
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gtk_cell_accessible_action_get_keybinding (AtkAction *action,
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gint index)
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{
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return NULL;
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}
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static gboolean
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gtk_cell_accessible_action_do_action (AtkAction *action,
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gint index)
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{
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GtkCellAccessible *cell = GTK_CELL_ACCESSIBLE (action);
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GtkCellAccessibleParent *parent;
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cell = GTK_CELL_ACCESSIBLE (action);
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if (gtk_accessible_get_widget (GTK_ACCESSIBLE (cell)) == NULL)
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return FALSE;
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parent = GTK_CELL_ACCESSIBLE_PARENT (gtk_widget_get_accessible (gtk_accessible_get_widget (GTK_ACCESSIBLE (cell))));
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switch (index)
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{
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case 0:
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gtk_cell_accessible_parent_expand_collapse (parent, cell);
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break;
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case 1:
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gtk_cell_accessible_parent_edit (parent, cell);
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break;
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case 2:
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gtk_cell_accessible_parent_activate (parent, cell);
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break;
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default:
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return FALSE;
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}
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return TRUE;
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}
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static void
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atk_action_interface_init (AtkActionIface *iface)
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{
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iface->get_n_actions = gtk_cell_accessible_action_get_n_actions;
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iface->do_action = gtk_cell_accessible_action_do_action;
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iface->get_name = gtk_cell_accessible_action_get_name;
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iface->get_description = gtk_cell_accessible_action_get_description;
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iface->get_keybinding = gtk_cell_accessible_action_get_keybinding;
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}
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static void
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gtk_cell_accessible_get_extents (AtkComponent *component,
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gint *x,
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gint *y,
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gint *width,
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gint *height,
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AtkCoordType coord_type)
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{
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GtkCellAccessible *cell;
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AtkObject *parent;
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cell = GTK_CELL_ACCESSIBLE (component);
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parent = gtk_widget_get_accessible (gtk_accessible_get_widget (GTK_ACCESSIBLE (cell)));
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gtk_cell_accessible_parent_get_cell_extents (GTK_CELL_ACCESSIBLE_PARENT (parent),
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cell,
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x, y, width, height, coord_type);
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}
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static gboolean
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gtk_cell_accessible_grab_focus (AtkComponent *component)
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{
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GtkCellAccessible *cell;
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AtkObject *parent;
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cell = GTK_CELL_ACCESSIBLE (component);
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parent = gtk_widget_get_accessible (gtk_accessible_get_widget (GTK_ACCESSIBLE (cell)));
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return gtk_cell_accessible_parent_grab_focus (GTK_CELL_ACCESSIBLE_PARENT (parent), cell);
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}
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static void
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atk_component_interface_init (AtkComponentIface *iface)
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{
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iface->get_extents = gtk_cell_accessible_get_extents;
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iface->grab_focus = gtk_cell_accessible_grab_focus;
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}
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static GtkCellRendererState
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gtk_cell_accessible_get_state (GtkCellAccessible *cell)
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{
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AtkObject *parent;
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g_return_val_if_fail (GTK_IS_CELL_ACCESSIBLE (cell), 0);
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parent = gtk_widget_get_accessible (gtk_accessible_get_widget (GTK_ACCESSIBLE (cell)));
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if (parent == NULL)
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return 0;
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return gtk_cell_accessible_parent_get_renderer_state (GTK_CELL_ACCESSIBLE_PARENT (parent), cell);
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}
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/*
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* gtk_cell_accessible_state_changed:
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* @cell: a #GtkCellAccessible
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* @added: the flags that were added from @cell
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* @removed: the flags that were removed from @cell
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*
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* Notifies @cell of state changes. Multiple states may be added
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* or removed at the same time. A state that is @added may not be
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* @removed at the same time.
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**/
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void
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_gtk_cell_accessible_state_changed (GtkCellAccessible *cell,
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GtkCellRendererState added,
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GtkCellRendererState removed)
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{
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AtkObject *object;
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guint i;
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g_return_if_fail (GTK_IS_CELL_ACCESSIBLE (cell));
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g_return_if_fail ((added & removed) == 0);
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object = ATK_OBJECT (cell);
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for (i = 0; i < G_N_ELEMENTS (state_map); i++)
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{
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if (added & state_map[i].renderer_state)
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atk_object_notify_state_change (object,
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state_map[i].atk_state,
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!state_map[i].invert);
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if (added & state_map[i].renderer_state)
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atk_object_notify_state_change (object,
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state_map[i].atk_state,
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state_map[i].invert);
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}
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}
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/*
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* gtk_cell_accessible_update_cache:
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* @cell: the cell that is changed
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*
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* Notifies the cell that the values in the data in the row that
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* is used to feed the cell renderer with has changed. The
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* cell_changed function of @cell is called to send update
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* notifications for the properties it takes from its cell
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* renderer.
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*
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* Note that there is no higher granularity available about which
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* properties changed, so you will need to make do with this
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* function.
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**/
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void
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_gtk_cell_accessible_update_cache (GtkCellAccessible *cell)
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{
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GtkCellAccessibleClass *klass;
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g_return_if_fail (GTK_CELL_ACCESSIBLE (cell));
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klass = GTK_CELL_ACCESSIBLE_GET_CLASS (cell);
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if (klass->update_cache)
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klass->update_cache (cell);
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}
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