/* GAIL - The GNOME Accessibility Implementation Library
* Copyright 2001, 2002, 2003 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"
#undef GTK_DISABLE_DEPRECATED
#include <gtk/gtk.h>
#include "gailcombo.h"
static void gail_combo_class_init (GailComboClass *klass);
static void gail_combo_init (GailCombo *combo);
static void gail_combo_real_initialize (AtkObject *obj,
gpointer data);
static void gail_combo_selection_changed_gtk (GtkWidget *widget,
gpointer data);
static gint gail_combo_get_n_children (AtkObject *obj);
static AtkObject* gail_combo_ref_child (AtkObject *obj,
gint i);
static void gail_combo_finalize (GObject *object);
static void atk_action_interface_init (AtkActionIface *iface);
static gboolean gail_combo_do_action (AtkAction *action,
gint i);
static gboolean idle_do_action (gpointer data);
static gint gail_combo_get_n_actions (AtkAction *action)
;
static const gchar* gail_combo_get_description (AtkAction *action,
gint i);
static const gchar* gail_combo_get_name (AtkAction *action,
gint i);
static gboolean gail_combo_set_description(AtkAction *action,
gint i,
const gchar *desc);
static void atk_selection_interface_init (AtkSelectionIface *iface);
static gboolean gail_combo_add_selection (AtkSelection *selection,
gint i);
static gboolean gail_combo_clear_selection (AtkSelection *selection);
static AtkObject* gail_combo_ref_selection (AtkSelection *selection,
gint i);
static gint gail_combo_get_selection_count (AtkSelection *selection);
static gboolean gail_combo_is_child_selected (AtkSelection *selection,
gint i);
static gboolean gail_combo_remove_selection (AtkSelection *selection,
gint i);
static gint _gail_combo_button_release (gpointer data);
static gint _gail_combo_popup_release (gpointer data);
G_DEFINE_TYPE_WITH_CODE (GailCombo, gail_combo, GAIL_TYPE_CONTAINER,
G_IMPLEMENT_INTERFACE (ATK_TYPE_ACTION, atk_action_interface_init)
G_IMPLEMENT_INTERFACE (ATK_TYPE_SELECTION, atk_selection_interface_init))
static void
gail_combo_class_init (GailComboClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
gobject_class->finalize = gail_combo_finalize;
class->get_n_children = gail_combo_get_n_children;
class->ref_child = gail_combo_ref_child;
class->initialize = gail_combo_real_initialize;
}
static void
gail_combo_init (GailCombo *combo)
{
combo->press_description = NULL;
combo->old_selection = NULL;
combo->deselect_idle_handler = 0;
combo->select_idle_handler = 0;
}
static void
gail_combo_real_initialize (AtkObject *obj,
gpointer data)
{
GtkCombo *combo;
GtkList *list;
GList *slist;
GailCombo *gail_combo;
ATK_OBJECT_CLASS (gail_combo_parent_class)->initialize (obj, data);
combo = GTK_COMBO (data);
list = GTK_LIST (combo->list);
slist = list->selection;
gail_combo = GAIL_COMBO (obj);
if (slist && slist->data)
{
gail_combo->old_selection = slist->data;
}
g_signal_connect (combo->list,
"selection_changed",
G_CALLBACK (gail_combo_selection_changed_gtk),
data);
atk_object_set_parent (gtk_widget_get_accessible (combo->entry), obj);
atk_object_set_parent (gtk_widget_get_accessible (combo->popup), obj);
obj->role = ATK_ROLE_COMBO_BOX;
}
static gboolean
notify_deselect (gpointer data)
{
GailCombo *combo;
combo = GAIL_COMBO (data);
combo->old_selection = NULL;
combo->deselect_idle_handler = 0;
g_signal_emit_by_name (data, "selection_changed");
return FALSE;
}
static gboolean
notify_select (gpointer data)
{
GailCombo *combo;
combo = GAIL_COMBO (data);
combo->select_idle_handler = 0;
g_signal_emit_by_name (data, "selection_changed");
return FALSE;
}
static void
gail_combo_selection_changed_gtk (GtkWidget *widget,
gpointer data)
{
GtkCombo *combo;
GtkList *list;
GList *slist;
AtkObject *obj;
GailCombo *gail_combo;
combo = GTK_COMBO (data);
list = GTK_LIST (combo->list);
slist = list->selection;
obj = gtk_widget_get_accessible (GTK_WIDGET (data));
gail_combo = GAIL_COMBO (obj);
if (slist && slist->data)
{
if (slist->data != gail_combo->old_selection)
{
gail_combo->old_selection = slist->data;
if (gail_combo->select_idle_handler == 0)
gail_combo->select_idle_handler = gdk_threads_add_idle (notify_select, gail_combo);
}
if (gail_combo->deselect_idle_handler)
{
g_source_remove (gail_combo->deselect_idle_handler);
gail_combo->deselect_idle_handler = 0;
}
}
else
{
if (gail_combo->deselect_idle_handler == 0)
gail_combo->deselect_idle_handler = gdk_threads_add_idle (notify_deselect, gail_combo);
if (gail_combo->select_idle_handler)
{
g_source_remove (gail_combo->select_idle_handler);
gail_combo->select_idle_handler = 0;
}
}
}
/*
* The children of a GailCombo are the list of items and the entry field
*/
static gint
gail_combo_get_n_children (AtkObject* obj)
{
gint n_children = 2;
GtkWidget *widget;
g_return_val_if_fail (GAIL_IS_COMBO (obj), 0);
widget = GTK_ACCESSIBLE (obj)->widget;
if (widget == NULL)
/*
* State is defunct
*/
return 0;
return n_children;
}
static AtkObject*
gail_combo_ref_child (AtkObject *obj,
gint i)
{
AtkObject *accessible;
GtkWidget *widget;
g_return_val_if_fail (GAIL_IS_COMBO (obj), NULL);
if (i < 0 || i > 1)
return NULL;
widget = GTK_ACCESSIBLE (obj)->widget;
if (widget == NULL)
/*
* State is defunct
*/
return NULL;
if (i == 0)
accessible = gtk_widget_get_accessible (GTK_COMBO (widget)->popup);
else
accessible = gtk_widget_get_accessible (GTK_COMBO (widget)->entry);
g_object_ref (accessible);
return accessible;
}
static void
atk_action_interface_init (AtkActionIface *iface)
{
iface->do_action = gail_combo_do_action;
iface->get_n_actions = gail_combo_get_n_actions;
iface->get_description = gail_combo_get_description;
iface->get_name = gail_combo_get_name;
iface->set_description = gail_combo_set_description;
}
static gboolean
gail_combo_do_action (AtkAction *action,
gint i)
{
GailCombo *combo;
GtkWidget *widget;
widget = GTK_ACCESSIBLE (action)->widget;
if (widget == NULL)
/*
* State is defunct
*/
return FALSE;
if (!gtk_widget_get_sensitive (widget) || !gtk_widget_get_visible (widget))
return FALSE;
combo = GAIL_COMBO (action);
if (i == 0)
{
if (combo->action_idle_handler)
return FALSE;
combo->action_idle_handler = gdk_threads_add_idle (idle_do_action, combo);
return TRUE;
}
else
return FALSE;
}
/*
* This action is the pressing of the button on the combo box.
* The behavior is different depending on whether the list is being
* displayed or removed.
*
* A button press event is simulated on the appropriate widget and
* a button release event is simulated in an idle function.
*/
static gboolean
idle_do_action (gpointer data)
{
GtkCombo *combo;
GtkWidget *action_widget;
GtkWidget *widget;
GailCombo *gail_combo;
gboolean do_popup;
GdkEvent tmp_event;
gail_combo = GAIL_COMBO (data);
gail_combo->action_idle_handler = 0;
widget = GTK_ACCESSIBLE (gail_combo)->widget;
if (widget == NULL /* State is defunct */ ||
!gtk_widget_get_sensitive (widget) || !gtk_widget_get_visible (widget))
return FALSE;
combo = GTK_COMBO (widget);
do_popup = !gtk_widget_get_mapped (combo->popwin);
tmp_event.button.type = GDK_BUTTON_PRESS;
tmp_event.button.window = widget->window;
tmp_event.button.button = 1;
tmp_event.button.send_event = TRUE;
tmp_event.button.time = GDK_CURRENT_TIME;
tmp_event.button.axes = NULL;
if (do_popup)
{
/* Pop up list */
action_widget = combo->button;
gtk_widget_event (action_widget, &tmp_event);
/* FIXME !*/
g_idle_add (_gail_combo_button_release, combo);
}
else
{
/* Pop down list */
tmp_event.button.window = combo->list->window;
gdk_window_set_user_data (combo->list->window, combo->button);
action_widget = combo->popwin;
gtk_widget_event (action_widget, &tmp_event);
/* FIXME !*/
g_idle_add (_gail_combo_popup_release, combo);
}
return FALSE;
}
static gint
gail_combo_get_n_actions (AtkAction *action)
{
/*
* The default behavior of a combo box is to have one action -
*/
return 1;
}
static const gchar*
gail_combo_get_description (AtkAction *action,
gint i)
{
if (i == 0)
{
GailCombo *combo;
combo = GAIL_COMBO (action);
return combo->press_description;
}
else
return NULL;
}
static const gchar*
gail_combo_get_name (AtkAction *action,
gint i)
{
if (i == 0)
return "press";
else
return NULL;
}
static void
atk_selection_interface_init (AtkSelectionIface *iface)
{
iface->add_selection = gail_combo_add_selection;
iface->clear_selection = gail_combo_clear_selection;
iface->ref_selection = gail_combo_ref_selection;
iface->get_selection_count = gail_combo_get_selection_count;
iface->is_child_selected = gail_combo_is_child_selected;
iface->remove_selection = gail_combo_remove_selection;
/*
* select_all_selection does not make sense for a combo box
* so no implementation is provided.
*/
}
static gboolean
gail_combo_add_selection (AtkSelection *selection,
gint i)
{
GtkCombo *combo;
GtkWidget *widget;
widget = GTK_ACCESSIBLE (selection)->widget;
if (widget == NULL)
/*
* State is defunct
*/
return FALSE;
combo = GTK_COMBO (widget);
gtk_list_select_item (GTK_LIST (combo->list), i);
return TRUE;
}
static gboolean
gail_combo_clear_selection (AtkSelection *selection)
{
GtkCombo *combo;
GtkWidget *widget;
widget = GTK_ACCESSIBLE (selection)->widget;
if (widget == NULL)
/*
* State is defunct
*/
return FALSE;
combo = GTK_COMBO (widget);
gtk_list_unselect_all (GTK_LIST (combo->list));
return TRUE;
}
static AtkObject*
gail_combo_ref_selection (AtkSelection *selection,
gint i)
{
GtkCombo *combo;
GList * list;
GtkWidget *item;
AtkObject *obj;
GtkWidget *widget;
widget = GTK_ACCESSIBLE (selection)->widget;
if (widget == NULL)
/*
* State is defunct
*/
return NULL;
combo = GTK_COMBO (widget);
/*
* A combo box can have only one selection.
*/
if (i != 0)
return NULL;
list = GTK_LIST (combo->list)->selection;
if (list == NULL)
return NULL;
item = GTK_WIDGET (list->data);
obj = gtk_widget_get_accessible (item);
g_object_ref (obj);
return obj;
}
static gint
gail_combo_get_selection_count (AtkSelection *selection)
{
GtkCombo *combo;
GList * list;
GtkWidget *widget;
widget = GTK_ACCESSIBLE (selection)->widget;
if (widget == NULL)
/*
* State is defunct
*/
return 0;
combo = GTK_COMBO (widget);
/*
* The number of children currently selected is either 1 or 0 so we
* do not bother to count the elements of the selected list.
*/
list = GTK_LIST (combo->list)->selection;
if (list == NULL)
return 0;
else
return 1;
}
static gboolean
gail_combo_is_child_selected (AtkSelection *selection,
gint i)
{
GtkCombo *combo;
GList * list;
GtkWidget *item;
gint j;
GtkWidget *widget;
widget = GTK_ACCESSIBLE (selection)->widget;
if (widget == NULL)
/*
* State is defunct
*/
return FALSE;
combo = GTK_COMBO (widget);
list = GTK_LIST (combo->list)->selection;
if (list == NULL)
return FALSE;
item = GTK_WIDGET (list->data);
j = g_list_index (GTK_LIST (combo->list)->children, item);
return (j == i);
}
static gboolean
gail_combo_remove_selection (AtkSelection *selection,
gint i)
{
if (atk_selection_is_child_selected (selection, i))
atk_selection_clear_selection (selection);
return TRUE;
}
static gint
_gail_combo_popup_release (gpointer data)
{
GtkCombo *combo;
GtkWidget *action_widget;
GdkEvent tmp_event;
GDK_THREADS_ENTER ();
combo = GTK_COMBO (data);
if (combo->current_button == 0)
{
GDK_THREADS_LEAVE ();
return FALSE;
}
tmp_event.button.type = GDK_BUTTON_RELEASE;
tmp_event.button.button = 1;
tmp_event.button.time = GDK_CURRENT_TIME;
action_widget = combo->button;
gtk_widget_event (action_widget, &tmp_event);
GDK_THREADS_LEAVE ();
return FALSE;
}
static gint
_gail_combo_button_release (gpointer data)
{
GtkCombo *combo;
GtkWidget *action_widget;
GdkEvent tmp_event;
GDK_THREADS_ENTER ();
combo = GTK_COMBO (data);
if (combo->current_button == 0)
{
GDK_THREADS_LEAVE ();
return FALSE;
}
tmp_event.button.type = GDK_BUTTON_RELEASE;
tmp_event.button.button = 1;
tmp_event.button.window = combo->list->window;
tmp_event.button.time = GDK_CURRENT_TIME;
gdk_window_set_user_data (combo->list->window, combo->button);
action_widget = combo->list;
gtk_widget_event (action_widget, &tmp_event);
GDK_THREADS_LEAVE ();
return FALSE;
}
static gboolean
gail_combo_set_description (AtkAction *action,
gint i,
const gchar *desc)
{
if (i == 0)
{
GailCombo *combo;
combo = GAIL_COMBO (action);
g_free (combo->press_description);
combo->press_description = g_strdup (desc);
return TRUE;
}
else
return FALSE;
}
static void
gail_combo_finalize (GObject *object)
{
GailCombo *combo = GAIL_COMBO (object);
g_free (combo->press_description);
if (combo->action_idle_handler)
{
g_source_remove (combo->action_idle_handler);
combo->action_idle_handler = 0;
}
if (combo->deselect_idle_handler)
{
g_source_remove (combo->deselect_idle_handler);
combo->deselect_idle_handler = 0;
}
if (combo->select_idle_handler)
{
g_source_remove (combo->select_idle_handler);
combo->select_idle_handler = 0;
}
G_OBJECT_CLASS (gail_combo_parent_class)->finalize (object);
}