forked from AuroraMiddleware/gtk
489 lines
14 KiB
C
489 lines
14 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 <gdk/gdkkeysyms.h>
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#include "gailrange.h"
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#include "gailadjustment.h"
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#include "gail-private-macros.h"
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static void gail_range_class_init (GailRangeClass *klass);
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static void gail_range_init (GailRange *range);
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static void gail_range_real_initialize (AtkObject *obj,
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gpointer data);
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static void gail_range_finalize (GObject *object);
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static AtkStateSet* gail_range_ref_state_set (AtkObject *obj);
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static void gail_range_real_notify_gtk (GObject *obj,
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GParamSpec *pspec);
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static void atk_value_interface_init (AtkValueIface *iface);
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static void gail_range_get_current_value (AtkValue *obj,
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GValue *value);
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static void gail_range_get_maximum_value (AtkValue *obj,
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GValue *value);
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static void gail_range_get_minimum_value (AtkValue *obj,
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GValue *value);
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static gboolean gail_range_set_current_value (AtkValue *obj,
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const GValue *value);
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static void gail_range_value_changed (GtkAdjustment *adjustment,
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gpointer data);
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static void atk_action_interface_init (AtkActionIface *iface);
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static gboolean gail_range_do_action (AtkAction *action,
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gint i);
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static gboolean idle_do_action (gpointer data);
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static gint gail_range_get_n_actions (AtkAction *action);
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static G_CONST_RETURN gchar* gail_range_get_description (AtkAction *action,
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gint i);
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static G_CONST_RETURN gchar* gail_range_get_keybinding (AtkAction *action,
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gint i);
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static G_CONST_RETURN gchar* gail_range_action_get_name (AtkAction *action,
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gint i);
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static gboolean gail_range_set_description (AtkAction *action,
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gint i,
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const gchar *desc);
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G_DEFINE_TYPE_WITH_CODE (GailRange, gail_range, 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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gail_range_class_init (GailRangeClass *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;
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widget_class = (GailWidgetClass*)klass;
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widget_class->notify_gtk = gail_range_real_notify_gtk;
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class->ref_state_set = gail_range_ref_state_set;
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class->initialize = gail_range_real_initialize;
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gobject_class->finalize = gail_range_finalize;
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}
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static void
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gail_range_init (GailRange *range)
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{
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}
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static void
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gail_range_real_initialize (AtkObject *obj,
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gpointer data)
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{
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GailRange *range = GAIL_RANGE (obj);
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GtkRange *gtk_range;
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ATK_OBJECT_CLASS (gail_range_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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if (gtk_range->adjustment)
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{
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range->adjustment = gail_adjustment_new (gtk_range->adjustment);
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g_signal_connect (gtk_range->adjustment,
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"value-changed",
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G_CALLBACK (gail_range_value_changed),
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range);
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}
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else
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range->adjustment = NULL;
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range->activate_keybinding=NULL;
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range->activate_description=NULL;
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/*
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* Assumed to GtkScale (either GtkHScale or GtkVScale)
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*/
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obj->role = ATK_ROLE_SLIDER;
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}
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static AtkStateSet*
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gail_range_ref_state_set (AtkObject *obj)
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{
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AtkStateSet *state_set;
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GtkWidget *widget;
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GtkRange *range;
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state_set = ATK_OBJECT_CLASS (gail_range_parent_class)->ref_state_set (obj);
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widget = GTK_ACCESSIBLE (obj)->widget;
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if (widget == NULL)
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return state_set;
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range = GTK_RANGE (widget);
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/*
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* We do not generate property change for orientation change as there
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* is no interface to change the orientation which emits a notification
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*/
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if (range->orientation == GTK_ORIENTATION_HORIZONTAL)
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atk_state_set_add_state (state_set, ATK_STATE_HORIZONTAL);
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else
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atk_state_set_add_state (state_set, ATK_STATE_VERTICAL);
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return state_set;
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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 = gail_range_get_current_value;
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iface->get_maximum_value = gail_range_get_maximum_value;
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iface->get_minimum_value = gail_range_get_minimum_value;
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iface->set_current_value = gail_range_set_current_value;
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}
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static void
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gail_range_get_current_value (AtkValue *obj,
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GValue *value)
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{
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GailRange *range;
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g_return_if_fail (GAIL_IS_RANGE (obj));
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range = GAIL_RANGE (obj);
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if (range->adjustment == NULL)
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/*
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* Adjustment has not been specified
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*/
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return;
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atk_value_get_current_value (ATK_VALUE (range->adjustment), value);
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}
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static void
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gail_range_get_maximum_value (AtkValue *obj,
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GValue *value)
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{
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GailRange *range;
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g_return_if_fail (GAIL_IS_RANGE (obj));
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range = GAIL_RANGE (obj);
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if (range->adjustment == NULL)
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/*
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* Adjustment has not been specified
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*/
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return;
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atk_value_get_maximum_value (ATK_VALUE (range->adjustment), value);
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}
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static void
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gail_range_get_minimum_value (AtkValue *obj,
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GValue *value)
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{
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GailRange *range;
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g_return_if_fail (GAIL_IS_RANGE (obj));
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range = GAIL_RANGE (obj);
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if (range->adjustment == NULL)
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/*
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* Adjustment has not been specified
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*/
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return;
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atk_value_get_minimum_value (ATK_VALUE (range->adjustment), value);
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}
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static gboolean gail_range_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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g_return_val_if_fail (GAIL_IS_RANGE (obj), FALSE);
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widget = GTK_ACCESSIBLE (obj)->widget;
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if (widget == NULL)
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return FALSE;
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if (G_VALUE_HOLDS_DOUBLE (value))
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{
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GtkRange *range = GTK_RANGE (widget);
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gdouble new_value;
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new_value = g_value_get_double (value);
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gtk_range_set_value (range, new_value);
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return TRUE;
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}
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else
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{
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return FALSE;
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}
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}
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static void
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gail_range_finalize (GObject *object)
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{
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GailRange *range = GAIL_RANGE (object);
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if (range->adjustment)
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{
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/*
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* The GtkAdjustment may live on so we need to dicsonnect the
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* signal handler
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*/
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if (GAIL_ADJUSTMENT (range->adjustment)->adjustment)
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{
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g_signal_handlers_disconnect_by_func (GAIL_ADJUSTMENT (range->adjustment)->adjustment,
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(void *)gail_range_value_changed,
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range);
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}
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g_object_unref (range->adjustment);
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range->adjustment = NULL;
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}
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range->activate_keybinding=NULL;
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range->activate_description=NULL;
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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 (gail_range_parent_class)->finalize (object);
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}
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static void
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gail_range_real_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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GailRange *range = GAIL_RANGE (gtk_widget_get_accessible (widget));
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if (strcmp (pspec->name, "adjustment") == 0)
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{
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/*
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* Get rid of the GailAdjustment for the GtkAdjustment
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* which was associated with the range.
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*/
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if (range->adjustment)
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{
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g_object_unref (range->adjustment);
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range->adjustment = NULL;
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}
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/*
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* Create the GailAdjustment when notify for "adjustment" property
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* is received
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*/
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range->adjustment = gail_adjustment_new (GTK_RANGE (widget)->adjustment);
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g_signal_connect (GTK_RANGE (widget)->adjustment,
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"value-changed",
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G_CALLBACK (gail_range_value_changed),
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range);
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}
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else
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GAIL_WIDGET_CLASS (gail_range_parent_class)->notify_gtk (obj, pspec);
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}
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static void
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gail_range_value_changed (GtkAdjustment *adjustment,
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gpointer data)
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{
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GailRange *range;
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g_return_if_fail (adjustment != NULL);
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gail_return_if_fail (data != NULL);
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range = GAIL_RANGE (data);
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g_object_notify (G_OBJECT (range), "accessible-value");
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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 = gail_range_do_action;
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iface->get_n_actions = gail_range_get_n_actions;
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iface->get_description = gail_range_get_description;
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iface->get_keybinding = gail_range_get_keybinding;
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iface->get_name = gail_range_action_get_name;
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iface->set_description = gail_range_set_description;
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}
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static gboolean
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gail_range_do_action (AtkAction *action,
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gint i)
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{
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GailRange *range;
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GtkWidget *widget;
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gboolean return_value = TRUE;
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range = GAIL_RANGE (action);
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widget = GTK_ACCESSIBLE (action)->widget;
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if (widget == NULL)
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/*
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* State is defunct
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*/
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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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{
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if (range->action_idle_handler)
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return_value = FALSE;
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else
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range->action_idle_handler = gdk_threads_add_idle (idle_do_action, range);
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}
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else
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return_value = FALSE;
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return return_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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GailRange *range;
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GtkWidget *widget;
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range = GAIL_RANGE (data);
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range->action_idle_handler = 0;
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widget = GTK_ACCESSIBLE (range)->widget;
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if (widget == NULL /* State is defunct */ ||
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!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 FALSE;
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}
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static gint
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gail_range_get_n_actions (AtkAction *action)
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{
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return 1;
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}
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static G_CONST_RETURN gchar*
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gail_range_get_description (AtkAction *action,
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gint i)
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{
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GailRange *range;
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G_CONST_RETURN gchar *return_value;
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range = GAIL_RANGE (action);
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if (i==0)
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return_value = range->activate_description;
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else
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return_value = NULL;
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return return_value;
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}
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static G_CONST_RETURN gchar*
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gail_range_get_keybinding (AtkAction *action,
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gint i)
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{
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GailRange *range;
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gchar *return_value = NULL;
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range = GAIL_RANGE (action);
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if(i==0)
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{
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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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range = GAIL_RANGE (action);
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widget = GTK_ACCESSIBLE (range)->widget;
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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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if (GTK_IS_ACCESSIBLE (target_object))
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label = GTK_ACCESSIBLE (target_object)->widget;
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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_VoidSymbol)
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return_value = gtk_accelerator_name (key_val, GDK_MOD1_MASK);
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}
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g_free (range->activate_keybinding);
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range->activate_keybinding = return_value;
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}
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return return_value;
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}
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static G_CONST_RETURN gchar*
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gail_range_action_get_name (AtkAction *action,
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gint i)
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{
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G_CONST_RETURN gchar *return_value;
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if (i==0)
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return_value = "activate";
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else
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return_value = NULL;
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return return_value;
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}
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static gboolean
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gail_range_set_description (AtkAction *action,
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gint i,
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const gchar *desc)
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{
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GailRange *range;
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gchar **value;
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range = GAIL_RANGE (action);
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if (i==0)
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value = &range->activate_description;
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else
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value = NULL;
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if (value)
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{
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g_free (*value);
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*value = g_strdup (desc);
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return TRUE;
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}
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else
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return FALSE;
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}
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