forked from AuroraMiddleware/gtk
351 lines
9.7 KiB
C
351 lines
9.7 KiB
C
/* GAIL - The GNOME Accessibility Implementation Library
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* Copyright 2001, 2002, 2003 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, 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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#include "config.h"
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#include <string.h>
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#include <gtk/gtk.h>
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#include "gtkrangeaccessible.h"
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static void atk_action_interface_init (AtkActionIface *iface);
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static void atk_value_interface_init (AtkValueIface *iface);
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G_DEFINE_TYPE_WITH_CODE (GtkRangeAccessible, gtk_range_accessible, GAIL_TYPE_WIDGET,
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G_IMPLEMENT_INTERFACE (ATK_TYPE_ACTION, atk_action_interface_init)
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G_IMPLEMENT_INTERFACE (ATK_TYPE_VALUE, atk_value_interface_init))
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static void
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gtk_range_accessible_value_changed (GtkAdjustment *adjustment,
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gpointer data)
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{
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g_object_notify (G_OBJECT (data), "accessible-value");
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}
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static void
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gtk_range_accessible_initialize (AtkObject *obj,
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gpointer data)
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{
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GtkRangeAccessible *range = GTK_RANGE_ACCESSIBLE (obj);
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GtkAdjustment *adj;
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GtkRange *gtk_range;
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ATK_OBJECT_CLASS (gtk_range_accessible_parent_class)->initialize (obj, data);
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gtk_range = GTK_RANGE (data);
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/*
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* If a GtkAdjustment already exists for the GtkRange,
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* create the GailAdjustment
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*/
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adj = gtk_range_get_adjustment (gtk_range);
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if (adj)
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{
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g_signal_connect (adj,
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"value-changed",
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G_CALLBACK (gtk_range_accessible_value_changed),
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range);
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}
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obj->role = ATK_ROLE_SLIDER;
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}
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static void
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gtk_range_accessible_finalize (GObject *object)
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{
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GtkRangeAccessible *range = GTK_RANGE_ACCESSIBLE (object);
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GtkWidget *widget;
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GtkAdjustment *adj;
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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (object));
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if (widget)
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{
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adj = gtk_range_get_adjustment (GTK_RANGE (widget));
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if (adj)
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g_signal_handlers_disconnect_by_func (adj,
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gtk_range_accessible_value_changed,
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range);
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}
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if (range->action_idle_handler)
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{
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g_source_remove (range->action_idle_handler);
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range->action_idle_handler = 0;
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}
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G_OBJECT_CLASS (gtk_range_accessible_parent_class)->finalize (object);
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}
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static void
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gtk_range_accessible_notify_gtk (GObject *obj,
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GParamSpec *pspec)
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{
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GtkWidget *widget = GTK_WIDGET (obj);
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GtkAdjustment *adj;
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AtkObject *range;
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if (strcmp (pspec->name, "adjustment") == 0)
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{
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range = gtk_widget_get_accessible (widget);
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adj = gtk_range_get_adjustment (GTK_RANGE (widget));
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g_signal_connect (adj,
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"value-changed",
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G_CALLBACK (gtk_range_accessible_value_changed),
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range);
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}
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else
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GAIL_WIDGET_CLASS (gtk_range_accessible_parent_class)->notify_gtk (obj, pspec);
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}
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static void
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gtk_range_accessible_class_init (GtkRangeAccessibleClass *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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GailWidgetClass *widget_class = (GailWidgetClass*)klass;
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widget_class->notify_gtk = gtk_range_accessible_notify_gtk;
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class->initialize = gtk_range_accessible_initialize;
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gobject_class->finalize = gtk_range_accessible_finalize;
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}
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static void
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gtk_range_accessible_init (GtkRangeAccessible *range)
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{
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}
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static void
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gtk_range_accessible_get_current_value (AtkValue *obj,
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GValue *value)
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{
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GtkWidget *widget;
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GtkAdjustment *adjustment;
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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
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adjustment = gtk_range_get_adjustment (GTK_RANGE (widget));
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if (adjustment == NULL)
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return;
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memset (value, 0, sizeof (GValue));
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g_value_init (value, G_TYPE_DOUBLE);
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g_value_set_double (value, gtk_adjustment_get_value (adjustment));
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}
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static void
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gtk_range_accessible_get_maximum_value (AtkValue *obj,
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GValue *value)
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{
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GtkWidget *widget;
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GtkAdjustment *adjustment;
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gdouble max;
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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
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adjustment = gtk_range_get_adjustment (GTK_RANGE (widget));
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if (adjustment == NULL)
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return;
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max = gtk_adjustment_get_upper (adjustment)
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- gtk_adjustment_get_page_size (adjustment);
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if (gtk_range_get_restrict_to_fill_level (GTK_RANGE (widget)))
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max = MIN (max, gtk_range_get_fill_level (GTK_RANGE (widget)));
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memset (value, 0, sizeof (GValue));
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g_value_init (value, G_TYPE_DOUBLE);
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g_value_set_double (value, max);
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}
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static void
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gtk_range_accessible_get_minimum_value (AtkValue *obj,
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GValue *value)
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{
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GtkWidget *widget;
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GtkAdjustment *adjustment;
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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
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adjustment = gtk_range_get_adjustment (GTK_RANGE (widget));
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if (adjustment == NULL)
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return;
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memset (value, 0, sizeof (GValue));
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g_value_init (value, G_TYPE_DOUBLE);
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g_value_set_double (value, gtk_adjustment_get_lower (adjustment));
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}
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static void
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gtk_range_accessible_get_minimum_increment (AtkValue *obj,
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GValue *value)
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{
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GtkWidget *widget;
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GtkAdjustment *adjustment;
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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
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adjustment = gtk_range_get_adjustment (GTK_RANGE (widget));
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if (adjustment == NULL)
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return;
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memset (value, 0, sizeof (GValue));
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g_value_init (value, G_TYPE_DOUBLE);
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g_value_set_double (value, gtk_adjustment_get_minimum_increment (adjustment));
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}
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static gboolean
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gtk_range_accessible_set_current_value (AtkValue *obj,
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const GValue *value)
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{
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GtkWidget *widget;
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GtkAdjustment *adjustment;
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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
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adjustment = gtk_range_get_adjustment (GTK_RANGE (widget));
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if (adjustment == NULL)
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return FALSE;
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gtk_adjustment_set_value (adjustment, g_value_get_double (value));
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return TRUE;
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}
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static void
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atk_value_interface_init (AtkValueIface *iface)
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{
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iface->get_current_value = gtk_range_accessible_get_current_value;
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iface->get_maximum_value = gtk_range_accessible_get_maximum_value;
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iface->get_minimum_value = gtk_range_accessible_get_minimum_value;
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iface->get_minimum_increment = gtk_range_accessible_get_minimum_increment;
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iface->set_current_value = gtk_range_accessible_set_current_value;
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}
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static gboolean
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idle_do_action (gpointer data)
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{
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GtkRangeAccessible *range = GTK_RANGE_ACCESSIBLE (data);
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GtkWidget *widget;
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range->action_idle_handler = 0;
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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (range));
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if (widget == NULL)
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return FALSE;
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if (!gtk_widget_get_sensitive (widget) || !gtk_widget_get_visible (widget))
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return FALSE;
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gtk_widget_activate (widget);
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return TRUE;
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}
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static gboolean
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gtk_range_accessible_do_action (AtkAction *action,
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gint i)
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{
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GtkRangeAccessible *range = GTK_RANGE_ACCESSIBLE (action);
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GtkWidget *widget;
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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (action));
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if (widget == NULL)
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return FALSE;
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if (!gtk_widget_get_sensitive (widget) || !gtk_widget_get_visible (widget))
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return FALSE;
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if (i != 0)
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return FALSE;
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if (range->action_idle_handler)
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return FALSE;
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range->action_idle_handler = gdk_threads_add_idle (idle_do_action, range);
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return TRUE;
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}
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static gint
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gtk_range_accessible_get_n_actions (AtkAction *action)
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{
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return 1;
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}
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static const gchar *
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gtk_range_accessible_get_keybinding (AtkAction *action,
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gint i)
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{
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GtkRangeAccessible *range = GTK_RANGE_ACCESSIBLE (action);
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GtkWidget *widget;
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GtkWidget *label;
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AtkRelationSet *set;
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AtkRelation *relation;
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GPtrArray *target;
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gpointer target_object;
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guint key_val;
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gchar *return_value = NULL;
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if (i != 0)
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return NULL;
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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (range));
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if (widget == NULL)
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return NULL;
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set = atk_object_ref_relation_set (ATK_OBJECT (action));
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if (!set)
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return NULL;
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label = NULL;
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relation = atk_relation_set_get_relation_by_type (set, ATK_RELATION_LABELLED_BY);
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if (relation)
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{
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target = atk_relation_get_target (relation);
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target_object = g_ptr_array_index (target, 0);
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label = gtk_accessible_get_widget (GTK_ACCESSIBLE (target_object));
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}
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g_object_unref (set);
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if (GTK_IS_LABEL (label))
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{
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key_val = gtk_label_get_mnemonic_keyval (GTK_LABEL (label));
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if (key_val != GDK_KEY_VoidSymbol)
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return_value = gtk_accelerator_name (key_val, GDK_MOD1_MASK);
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}
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return return_value;
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}
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static const gchar *
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gtk_range_accessible_action_get_name (AtkAction *action,
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gint i)
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{
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if (i != 0)
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return NULL;
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return "activate";
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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->do_action = gtk_range_accessible_do_action;
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iface->get_n_actions = gtk_range_accessible_get_n_actions;
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iface->get_keybinding = gtk_range_accessible_get_keybinding;
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iface->get_name = gtk_range_accessible_action_get_name;
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}
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