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/* GAIL - The GNOME Accessibility Enabling 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"
#include <string.h>
#include <gtk/gtk.h>
#include "gailscrolledwindow.h"
static void gail_scrolled_window_class_init (GailScrolledWindowClass *klass);
static void gail_scrolled_window_init (GailScrolledWindow *window);
static void gail_scrolled_window_real_initialize
(AtkObject *obj,
gpointer data);
static gint gail_scrolled_window_get_n_children (AtkObject *object);
static AtkObject* gail_scrolled_window_ref_child (AtkObject *obj,
gint child);
static void gail_scrolled_window_scrollbar_visibility_changed
(GObject *object,
GParamSpec *pspec,
gpointer user_data);
G_DEFINE_TYPE (GailScrolledWindow, gail_scrolled_window, GAIL_TYPE_CONTAINER)
static void
gail_scrolled_window_class_init (GailScrolledWindowClass *klass)
{
AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
class->get_n_children = gail_scrolled_window_get_n_children;
class->ref_child = gail_scrolled_window_ref_child;
class->initialize = gail_scrolled_window_real_initialize;
}
static void
gail_scrolled_window_init (GailScrolledWindow *window)
{
}
static void
gail_scrolled_window_real_initialize (AtkObject *obj,
gpointer data)
{
GtkScrolledWindow *window;
ATK_OBJECT_CLASS (gail_scrolled_window_parent_class)->initialize (obj, data);
window = GTK_SCROLLED_WINDOW (data);
g_signal_connect_data (gtk_scrolled_window_get_hscrollbar (window), "notify::visible",
G_CALLBACK (gail_scrolled_window_scrollbar_visibility_changed),
obj, NULL, FALSE);
g_signal_connect_data (gtk_scrolled_window_get_vscrollbar (window), "notify::visible",
G_CALLBACK (gail_scrolled_window_scrollbar_visibility_changed),
obj, NULL, FALSE);
obj->role = ATK_ROLE_SCROLL_PANE;
}
static gint
gail_scrolled_window_get_n_children (AtkObject *object)
{
GtkWidget *widget;
GtkScrolledWindow *gtk_window;
GList *children;
gint n_children;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (object));
if (widget == NULL)
/* Object is defunct */
return 0;
gtk_window = GTK_SCROLLED_WINDOW (widget);
/* Get the number of children returned by the backing GtkScrolledWindow */
children = gtk_container_get_children (GTK_CONTAINER(gtk_window));
n_children = g_list_length (children);
g_list_free (children);
/* Add one to the count for each visible scrollbar */
if (gtk_scrolled_window_get_hscrollbar (gtk_window))
n_children++;
if (gtk_scrolled_window_get_vscrollbar (gtk_window))
n_children++;
return n_children;
}
static AtkObject *
gail_scrolled_window_ref_child (AtkObject *obj,
gint child)
{
GtkWidget *widget;
GtkScrolledWindow *gtk_window;
GtkWidget *hscrollbar, *vscrollbar;
GList *children, *tmp_list;
gint n_children;
AtkObject *accessible = NULL;
g_return_val_if_fail (child >= 0, NULL);
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
if (widget == NULL)
/* Object is defunct */
return NULL;
gtk_window = GTK_SCROLLED_WINDOW (widget);
hscrollbar = gtk_scrolled_window_get_hscrollbar (gtk_window);
vscrollbar = gtk_scrolled_window_get_vscrollbar (gtk_window);
children = gtk_container_get_children (GTK_CONTAINER (gtk_window));
n_children = g_list_length (children);
if (child == n_children)
{
if (gtk_scrolled_window_get_hscrollbar (gtk_window))
accessible = gtk_widget_get_accessible (hscrollbar);
else if (gtk_scrolled_window_get_vscrollbar (gtk_window))
accessible = gtk_widget_get_accessible (vscrollbar);
}
else if (child == n_children+1 &&
gtk_scrolled_window_get_hscrollbar (gtk_window) &&
gtk_scrolled_window_get_vscrollbar (gtk_window))
accessible = gtk_widget_get_accessible (vscrollbar);
else if (child < n_children)
{
tmp_list = g_list_nth (children, child);
if (tmp_list)
accessible = gtk_widget_get_accessible (
GTK_WIDGET (tmp_list->data));
}
g_list_free (children);
if (accessible)
g_object_ref (accessible);
return accessible;
}
static void
gail_scrolled_window_scrollbar_visibility_changed (GObject *object,
GParamSpec *pspec,
gpointer user_data)
{
if (!strcmp (pspec->name, "visible"))
{
gint index;
gint n_children;
gboolean child_added = FALSE;
GList *children;
AtkObject *child;
GtkScrolledWindow *gtk_window;
GtkWidget *hscrollbar, *vscrollbar;
GailScrolledWindow *gail_window = GAIL_SCROLLED_WINDOW (user_data);
gchar *signal_name;
gtk_window = GTK_SCROLLED_WINDOW (gtk_accessible_get_widget (GTK_ACCESSIBLE (user_data)));
if (gtk_window == NULL)
return;
children = gtk_container_get_children (GTK_CONTAINER (gtk_window));
index = n_children = g_list_length (children);
g_list_free (children);
hscrollbar = gtk_scrolled_window_get_hscrollbar (gtk_window);
vscrollbar = gtk_scrolled_window_get_vscrollbar (gtk_window);
if ((gpointer) object == (gpointer) (hscrollbar))
{
if (gtk_scrolled_window_get_hscrollbar (gtk_window))
child_added = TRUE;
child = gtk_widget_get_accessible (hscrollbar);
}
else if ((gpointer) object == (gpointer) (vscrollbar))
{
if (gtk_scrolled_window_get_vscrollbar (gtk_window))
child_added = TRUE;
child = gtk_widget_get_accessible (vscrollbar);
if (gtk_scrolled_window_get_hscrollbar (gtk_window))
index = n_children+1;
}
else
{
g_assert_not_reached ();
return;
}
if (child_added)
signal_name = "children_changed::add";
else
signal_name = "children_changed::delete";
g_signal_emit_by_name (gail_window, signal_name, index, child, NULL);
}
}
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