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gtk2/gtk/a11y/gtkcellaccessible.c

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/* GAIL - The GNOME Accessibility Implementation Library
* Copyright 2001 Sun Microsystems Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <gtk/gtk.h>
#include "gtkcontainercellaccessible.h"
#include "gtkcellaccessible.h"
#include "gtkcellaccessibleparent.h"
static const struct {
AtkState atk_state;
GtkCellRendererState renderer_state;
gboolean invert;
} state_map[] = {
{ ATK_STATE_SENSITIVE, GTK_CELL_RENDERER_INSENSITIVE, TRUE },
{ ATK_STATE_ENABLED, GTK_CELL_RENDERER_INSENSITIVE, TRUE },
{ ATK_STATE_SELECTED, GTK_CELL_RENDERER_SELECTED, FALSE },
/* XXX: why do we map ACTIVE here? */
{ ATK_STATE_ACTIVE, GTK_CELL_RENDERER_FOCUSED, FALSE },
{ ATK_STATE_FOCUSED, GTK_CELL_RENDERER_FOCUSED, FALSE },
{ ATK_STATE_EXPANDABLE,GTK_CELL_RENDERER_EXPANDABLE, FALSE },
{ ATK_STATE_EXPANDED, GTK_CELL_RENDERER_EXPANDED, FALSE },
};
static void atk_action_interface_init (AtkActionIface *iface);
static void atk_component_interface_init (AtkComponentIface *iface);
G_DEFINE_TYPE_WITH_CODE (GtkCellAccessible, _gtk_cell_accessible, ATK_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (ATK_TYPE_ACTION, atk_action_interface_init)
G_IMPLEMENT_INTERFACE (ATK_TYPE_COMPONENT, atk_component_interface_init))
static void
gtk_cell_accessible_object_finalize (GObject *obj)
{
AtkRelationSet *relation_set;
AtkRelation *relation;
GPtrArray *target;
gpointer target_object;
gint i;
relation_set = atk_object_ref_relation_set (ATK_OBJECT (obj));
if (ATK_IS_RELATION_SET (relation_set))
{
relation = atk_relation_set_get_relation_by_type (relation_set,
ATK_RELATION_NODE_CHILD_OF);
if (relation)
{
target = atk_relation_get_target (relation);
for (i = 0; i < target->len; i++)
{
target_object = g_ptr_array_index (target, i);
if (GTK_IS_CELL_ACCESSIBLE (target_object))
g_object_unref (target_object);
}
}
g_object_unref (relation_set);
}
G_OBJECT_CLASS (_gtk_cell_accessible_parent_class)->finalize (obj);
}
static gint
gtk_cell_accessible_get_index_in_parent (AtkObject *obj)
{
GtkCellAccessible *cell;
AtkObject *parent;
cell = GTK_CELL_ACCESSIBLE (obj);
parent = atk_object_get_parent (obj);
if (GTK_IS_CONTAINER_CELL_ACCESSIBLE (parent))
return g_list_index (GTK_CONTAINER_CELL_ACCESSIBLE (parent)->children, obj);
parent = gtk_widget_get_accessible (cell->widget);
if (parent == NULL)
return -1;
return _gtk_cell_accessible_parent_get_child_index (GTK_CELL_ACCESSIBLE_PARENT (parent), cell);
}
static AtkStateSet *
gtk_cell_accessible_ref_state_set (AtkObject *accessible)
{
GtkCellAccessible *cell_accessible;
AtkStateSet *state_set;
GtkCellRendererState flags;
guint i;
cell_accessible = GTK_CELL_ACCESSIBLE (accessible);
state_set = atk_state_set_new ();
if (cell_accessible->widget == NULL)
{
atk_state_set_add_state (state_set, ATK_STATE_DEFUNCT);
return state_set;
}
flags = _gtk_cell_accessible_get_state (cell_accessible);
atk_state_set_add_state (state_set, ATK_STATE_FOCUSABLE);
atk_state_set_add_state (state_set, ATK_STATE_SELECTABLE);
atk_state_set_add_state (state_set, ATK_STATE_TRANSIENT);
atk_state_set_add_state (state_set, ATK_STATE_VISIBLE);
for (i = 0; i < G_N_ELEMENTS (state_map); i++)
{
if (flags & state_map[i].renderer_state)
{
if (!state_map[i].invert)
atk_state_set_add_state (state_set, state_map[i].atk_state);
}
else
{
if (state_map[i].invert)
atk_state_set_add_state (state_set, state_map[i].atk_state);
}
}
if (gtk_widget_get_mapped (cell_accessible->widget))
atk_state_set_add_state (state_set, ATK_STATE_SHOWING);
return state_set;
}
static void
_gtk_cell_accessible_class_init (GtkCellAccessibleClass *klass)
{
AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
GObjectClass *g_object_class = G_OBJECT_CLASS (klass);
g_object_class->finalize = gtk_cell_accessible_object_finalize;
class->get_index_in_parent = gtk_cell_accessible_get_index_in_parent;
class->ref_state_set = gtk_cell_accessible_ref_state_set;
}
static void
_gtk_cell_accessible_init (GtkCellAccessible *cell)
{
cell->widget = NULL;
}
static void
widget_destroyed (GtkWidget *widget,
GtkCellAccessible *cell)
{
cell->widget = NULL;
}
void
_gtk_cell_accessible_initialise (GtkCellAccessible *cell,
GtkWidget *widget,
AtkObject *parent)
{
cell->widget = widget;
atk_object_set_parent (ATK_OBJECT (cell), parent);
g_signal_connect_object (G_OBJECT (widget), "destroy",
G_CALLBACK (widget_destroyed), cell, 0);
}
gboolean
_gtk_cell_accessible_add_state (GtkCellAccessible *cell,
AtkStateType state_type,
gboolean emit_signal)
{
AtkObject *parent;
/* The signal should only be generated if the value changed,
* not when the cell is set up. So states that are set
* initially should pass FALSE as the emit_signal argument.
*/
if (emit_signal)
{
atk_object_notify_state_change (ATK_OBJECT (cell), state_type, TRUE);
/* If state_type is ATK_STATE_VISIBLE, additional notification */
if (state_type == ATK_STATE_VISIBLE)
g_signal_emit_by_name (cell, "visible-data-changed");
}
/* If the parent is a flyweight container cell, propagate the state
* change to it also
*/
parent = atk_object_get_parent (ATK_OBJECT (cell));
if (GTK_IS_CONTAINER_CELL_ACCESSIBLE (parent))
_gtk_cell_accessible_add_state (GTK_CELL_ACCESSIBLE (parent), state_type, emit_signal);
return TRUE;
}
gboolean
_gtk_cell_accessible_remove_state (GtkCellAccessible *cell,
AtkStateType state_type,
gboolean emit_signal)
{
AtkObject *parent;
parent = atk_object_get_parent (ATK_OBJECT (cell));
/* The signal should only be generated if the value changed,
* not when the cell is set up. So states that are set
* initially should pass FALSE as the emit_signal argument.
*/
if (emit_signal)
{
atk_object_notify_state_change (ATK_OBJECT (cell), state_type, FALSE);
/* If state_type is ATK_STATE_VISIBLE, additional notification */
if (state_type == ATK_STATE_VISIBLE)
g_signal_emit_by_name (cell, "visible-data-changed");
}
/* If the parent is a flyweight container cell, propagate the state
* change to it also
*/
if (GTK_IS_CONTAINER_CELL_ACCESSIBLE (parent))
_gtk_cell_accessible_remove_state (GTK_CELL_ACCESSIBLE (parent), state_type, emit_signal);
return TRUE;
}
static gint
gtk_cell_accessible_action_get_n_actions (AtkAction *action)
{
return 3;
}
static const gchar *
gtk_cell_accessible_action_get_name (AtkAction *action,
gint index)
{
switch (index)
{
case 0:
return "expand or contract";
case 1:
return "edit";
case 2:
return "activate";
default:
return NULL;
}
}
static const gchar *
gtk_cell_accessible_action_get_description (AtkAction *action,
gint index)
{
switch (index)
{
case 0:
return "expands or contracts the row in the tree view containing this cell";
case 1:
return "creates a widget in which the contents of the cell can be edited";
case 2:
return "activate the cell";
default:
return NULL;
}
}
static const gchar *
gtk_cell_accessible_action_get_keybinding (AtkAction *action,
gint index)
{
return NULL;
}
static gboolean
gtk_cell_accessible_action_do_action (AtkAction *action,
gint index)
{
GtkCellAccessible *cell = GTK_CELL_ACCESSIBLE (action);
GtkCellAccessibleParent *parent;
cell = GTK_CELL_ACCESSIBLE (action);
if (cell->widget == NULL)
return FALSE;
parent = GTK_CELL_ACCESSIBLE_PARENT (gtk_widget_get_accessible (cell->widget));
switch (index)
{
case 0:
_gtk_cell_accessible_parent_expand_collapse (parent, cell);
case 1:
_gtk_cell_accessible_parent_edit (parent, cell);
case 2:
_gtk_cell_accessible_parent_activate (parent, cell);
default:
return FALSE;
}
return TRUE;
}
static void
atk_action_interface_init (AtkActionIface *iface)
{
iface->get_n_actions = gtk_cell_accessible_action_get_n_actions;
iface->do_action = gtk_cell_accessible_action_do_action;
iface->get_name = gtk_cell_accessible_action_get_name;
iface->get_description = gtk_cell_accessible_action_get_description;
iface->get_keybinding = gtk_cell_accessible_action_get_keybinding;
}
static void
gtk_cell_accessible_get_extents (AtkComponent *component,
gint *x,
gint *y,
gint *width,
gint *height,
AtkCoordType coord_type)
{
GtkCellAccessible *cell;
AtkObject *parent;
cell = GTK_CELL_ACCESSIBLE (component);
parent = gtk_widget_get_accessible (cell->widget);
_gtk_cell_accessible_parent_get_cell_extents (GTK_CELL_ACCESSIBLE_PARENT (parent),
cell,
x, y, width, height, coord_type);
}
static gboolean
gtk_cell_accessible_grab_focus (AtkComponent *component)
{
GtkCellAccessible *cell;
AtkObject *parent;
cell = GTK_CELL_ACCESSIBLE (component);
parent = gtk_widget_get_accessible (cell->widget);
return _gtk_cell_accessible_parent_grab_focus (GTK_CELL_ACCESSIBLE_PARENT (parent), cell);
}
static void
atk_component_interface_init (AtkComponentIface *iface)
{
iface->get_extents = gtk_cell_accessible_get_extents;
iface->grab_focus = gtk_cell_accessible_grab_focus;
}
/**
* _gtk_cell_accessible_get_state:
* @cell: a #GtkCellAccessible
*
* Gets the state that would be used to render the area referenced by @cell.
*
* Returns: the #GtkCellRendererState for cell
**/
GtkCellRendererState
_gtk_cell_accessible_get_state (GtkCellAccessible *cell)
{
AtkObject *parent;
g_return_val_if_fail (GTK_IS_CELL_ACCESSIBLE (cell), 0);
parent = gtk_widget_get_accessible (cell->widget);
if (parent == NULL)
return 0;
return _gtk_cell_accessible_parent_get_renderer_state (GTK_CELL_ACCESSIBLE_PARENT (parent), cell);
}
/**
* _gtk_cell_accessible_state_changed:
* @cell: a #GtkCellAccessible
* @added: the flags that were added from @cell
* @removed: the flags that were removed from @cell
*
* Notifies @cell of state changes. Multiple states may be added
* or removed at the same time. A state that is @added may not be
* @removed at the same time.
**/
void
_gtk_cell_accessible_state_changed (GtkCellAccessible *cell,
GtkCellRendererState added,
GtkCellRendererState removed)
{
AtkObject *object;
guint i;
g_return_if_fail (GTK_IS_CELL_ACCESSIBLE (cell));
g_return_if_fail ((added & removed) == 0);
object = ATK_OBJECT (cell);
for (i = 0; i < G_N_ELEMENTS (state_map); i++)
{
if (added & state_map[i].renderer_state)
atk_object_notify_state_change (object,
state_map[i].atk_state,
!state_map[i].invert);
if (added & state_map[i].renderer_state)
atk_object_notify_state_change (object,
state_map[i].atk_state,
state_map[i].invert);
}
}
/**
* _gtk_cell_accessible_update_cache:
* @cell: the cell that is changed
*
* Notifies the cell that the values in the data in the row that
* is used to feed the cell renderer with has changed. The
* cell_changed function of @cell is called to send update
* notifications for the properties it takes from its cell
* renderer.
*
* Note that there is no higher granularity available about which
* properties changed, so you will need to make do with this
* function.
**/
void
_gtk_cell_accessible_update_cache (GtkCellAccessible *cell)
{
GtkCellAccessibleClass *klass;
g_return_if_fail (GTK_CELL_ACCESSIBLE (cell));
klass = GTK_CELL_ACCESSIBLE_GET_CLASS (cell);
if (klass->update_cache)
klass->update_cache (cell);
}
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