/* 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"
#include <string.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include "gailrange.h"
#include "gailadjustment.h"
#include "gail-private-macros.h"
static void gail_range_class_init (GailRangeClass *klass);
static void gail_range_init (GailRange *range);
static void gail_range_real_initialize (AtkObject *obj,
gpointer data);
static void gail_range_finalize (GObject *object);
static AtkStateSet* gail_range_ref_state_set (AtkObject *obj);
static void gail_range_real_notify_gtk (GObject *obj,
GParamSpec *pspec);
static void atk_value_interface_init (AtkValueIface *iface);
static void gail_range_get_current_value (AtkValue *obj,
GValue *value);
static void gail_range_get_maximum_value (AtkValue *obj,
GValue *value);
static void gail_range_get_minimum_value (AtkValue *obj,
GValue *value);
static void gail_range_get_minimum_increment (AtkValue *obj,
GValue *value);
static gboolean gail_range_set_current_value (AtkValue *obj,
const GValue *value);
static void gail_range_value_changed (GtkAdjustment *adjustment,
gpointer data);
static void atk_action_interface_init (AtkActionIface *iface);
static gboolean gail_range_do_action (AtkAction *action,
gint i);
static gboolean idle_do_action (gpointer data);
static gint gail_range_get_n_actions (AtkAction *action);
static const gchar* gail_range_get_description (AtkAction *action,
gint i);
static const gchar* gail_range_get_keybinding (AtkAction *action,
gint i);
static const gchar* gail_range_action_get_name (AtkAction *action,
gint i);
static gboolean gail_range_set_description (AtkAction *action,
gint i,
const gchar *desc);
G_DEFINE_TYPE_WITH_CODE (GailRange, gail_range, GAIL_TYPE_WIDGET,
G_IMPLEMENT_INTERFACE (ATK_TYPE_ACTION, atk_action_interface_init)
G_IMPLEMENT_INTERFACE (ATK_TYPE_VALUE, atk_value_interface_init))
static void
gail_range_class_init (GailRangeClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
GailWidgetClass *widget_class;
widget_class = (GailWidgetClass*)klass;
widget_class->notify_gtk = gail_range_real_notify_gtk;
class->ref_state_set = gail_range_ref_state_set;
class->initialize = gail_range_real_initialize;
gobject_class->finalize = gail_range_finalize;
}
static void
gail_range_init (GailRange *range)
{
}
static void
gail_range_real_initialize (AtkObject *obj,
gpointer data)
{
GailRange *range = GAIL_RANGE (obj);
GtkRange *gtk_range;
ATK_OBJECT_CLASS (gail_range_parent_class)->initialize (obj, data);
gtk_range = GTK_RANGE (data);
/*
* If a GtkAdjustment already exists for the GtkRange,
* create the GailAdjustment
*/
if (gtk_range->adjustment)
{
range->adjustment = gail_adjustment_new (gtk_range->adjustment);
g_signal_connect (gtk_range->adjustment,
"value-changed",
G_CALLBACK (gail_range_value_changed),
range);
}
else
range->adjustment = NULL;
range->activate_keybinding=NULL;
range->activate_description=NULL;
/*
* Assumed to GtkScale (either GtkHScale or GtkVScale)
*/
obj->role = ATK_ROLE_SLIDER;
}
static AtkStateSet*
gail_range_ref_state_set (AtkObject *obj)
{
AtkStateSet *state_set;
GtkWidget *widget;
GtkRange *range;
state_set = ATK_OBJECT_CLASS (gail_range_parent_class)->ref_state_set (obj);
widget = GTK_ACCESSIBLE (obj)->widget;
if (widget == NULL)
return state_set;
range = GTK_RANGE (widget);
/*
* We do not generate property change for orientation change as there
* is no interface to change the orientation which emits a notification
*/
if (range->orientation == GTK_ORIENTATION_HORIZONTAL)
atk_state_set_add_state (state_set, ATK_STATE_HORIZONTAL);
else
atk_state_set_add_state (state_set, ATK_STATE_VERTICAL);
return state_set;
}
static void
atk_value_interface_init (AtkValueIface *iface)
{
iface->get_current_value = gail_range_get_current_value;
iface->get_maximum_value = gail_range_get_maximum_value;
iface->get_minimum_value = gail_range_get_minimum_value;
iface->get_minimum_increment = gail_range_get_minimum_increment;
iface->set_current_value = gail_range_set_current_value;
}
static void
gail_range_get_current_value (AtkValue *obj,
GValue *value)
{
GailRange *range;
g_return_if_fail (GAIL_IS_RANGE (obj));
range = GAIL_RANGE (obj);
if (range->adjustment == NULL)
/*
* Adjustment has not been specified
*/
return;
atk_value_get_current_value (ATK_VALUE (range->adjustment), value);
}
static void
gail_range_get_maximum_value (AtkValue *obj,
GValue *value)
{
GailRange *range;
GtkRange *gtk_range;
GtkAdjustment *gtk_adjustment;
gdouble max = 0;
g_return_if_fail (GAIL_IS_RANGE (obj));
range = GAIL_RANGE (obj);
if (range->adjustment == NULL)
/*
* Adjustment has not been specified
*/
return;
atk_value_get_maximum_value (ATK_VALUE (range->adjustment), value);
gtk_range = GTK_RANGE (gtk_accessible_get_widget (GTK_ACCESSIBLE (range)));
g_return_if_fail (gtk_range);
gtk_adjustment = gtk_range_get_adjustment (gtk_range);
max = g_value_get_double (value);
max -= gtk_adjustment_get_page_size (gtk_adjustment);
if (gtk_range_get_restrict_to_fill_level (gtk_range))
max = MIN (max, gtk_range_get_fill_level (gtk_range));
g_value_set_double (value, max);
}
static void
gail_range_get_minimum_value (AtkValue *obj,
GValue *value)
{
GailRange *range;
g_return_if_fail (GAIL_IS_RANGE (obj));
range = GAIL_RANGE (obj);
if (range->adjustment == NULL)
/*
* Adjustment has not been specified
*/
return;
atk_value_get_minimum_value (ATK_VALUE (range->adjustment), value);
}
static void
gail_range_get_minimum_increment (AtkValue *obj, GValue *value)
{
GailRange *range;
g_return_if_fail (GAIL_IS_RANGE (obj));
range = GAIL_RANGE (obj);
if (range->adjustment == NULL)
/*
* Adjustment has not been specified
*/
return;
atk_value_get_minimum_increment (ATK_VALUE (range->adjustment), value);
}
static gboolean gail_range_set_current_value (AtkValue *obj,
const GValue *value)
{
GtkWidget *widget;
g_return_val_if_fail (GAIL_IS_RANGE (obj), FALSE);
widget = GTK_ACCESSIBLE (obj)->widget;
if (widget == NULL)
return FALSE;
if (G_VALUE_HOLDS_DOUBLE (value))
{
GtkRange *range = GTK_RANGE (widget);
gdouble new_value;
new_value = g_value_get_double (value);
gtk_range_set_value (range, new_value);
return TRUE;
}
else
{
return FALSE;
}
}
static void
gail_range_finalize (GObject *object)
{
GailRange *range = GAIL_RANGE (object);
if (range->adjustment)
{
/*
* The GtkAdjustment may live on so we need to dicsonnect the
* signal handler
*/
if (GAIL_ADJUSTMENT (range->adjustment)->adjustment)
{
g_signal_handlers_disconnect_by_func (GAIL_ADJUSTMENT (range->adjustment)->adjustment,
(void *)gail_range_value_changed,
range);
}
g_object_unref (range->adjustment);
range->adjustment = NULL;
}
range->activate_keybinding=NULL;
range->activate_description=NULL;
if (range->action_idle_handler)
{
g_source_remove (range->action_idle_handler);
range->action_idle_handler = 0;
}
G_OBJECT_CLASS (gail_range_parent_class)->finalize (object);
}
static void
gail_range_real_notify_gtk (GObject *obj,
GParamSpec *pspec)
{
GtkWidget *widget = GTK_WIDGET (obj);
GailRange *range = GAIL_RANGE (gtk_widget_get_accessible (widget));
if (strcmp (pspec->name, "adjustment") == 0)
{
/*
* Get rid of the GailAdjustment for the GtkAdjustment
* which was associated with the range.
*/
if (range->adjustment)
{
g_object_unref (range->adjustment);
range->adjustment = NULL;
}
/*
* Create the GailAdjustment when notify for "adjustment" property
* is received
*/
range->adjustment = gail_adjustment_new (GTK_RANGE (widget)->adjustment);
g_signal_connect (GTK_RANGE (widget)->adjustment,
"value-changed",
G_CALLBACK (gail_range_value_changed),
range);
}
else
GAIL_WIDGET_CLASS (gail_range_parent_class)->notify_gtk (obj, pspec);
}
static void
gail_range_value_changed (GtkAdjustment *adjustment,
gpointer data)
{
GailRange *range;
g_return_if_fail (adjustment != NULL);
gail_return_if_fail (data != NULL);
range = GAIL_RANGE (data);
g_object_notify (G_OBJECT (range), "accessible-value");
}
static void
atk_action_interface_init (AtkActionIface *iface)
{
iface->do_action = gail_range_do_action;
iface->get_n_actions = gail_range_get_n_actions;
iface->get_description = gail_range_get_description;
iface->get_keybinding = gail_range_get_keybinding;
iface->get_name = gail_range_action_get_name;
iface->set_description = gail_range_set_description;
}
static gboolean
gail_range_do_action (AtkAction *action,
gint i)
{
GailRange *range;
GtkWidget *widget;
gboolean return_value = TRUE;
range = GAIL_RANGE (action);
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;
if(i==0)
{
if (range->action_idle_handler)
return_value = FALSE;
else
range->action_idle_handler = gdk_threads_add_idle (idle_do_action, range);
}
else
return_value = FALSE;
return return_value;
}
static gboolean
idle_do_action (gpointer data)
{
GailRange *range;
GtkWidget *widget;
range = GAIL_RANGE (data);
range->action_idle_handler = 0;
widget = GTK_ACCESSIBLE (range)->widget;
if (widget == NULL /* State is defunct */ ||
!gtk_widget_get_sensitive (widget) || !gtk_widget_get_visible (widget))
return FALSE;
gtk_widget_activate (widget);
return FALSE;
}
static gint
gail_range_get_n_actions (AtkAction *action)
{
return 1;
}
static const gchar*
gail_range_get_description (AtkAction *action,
gint i)
{
GailRange *range;
const gchar *return_value;
range = GAIL_RANGE (action);
if (i==0)
return_value = range->activate_description;
else
return_value = NULL;
return return_value;
}
static const gchar*
gail_range_get_keybinding (AtkAction *action,
gint i)
{
GailRange *range;
gchar *return_value = NULL;
range = GAIL_RANGE (action);
if(i==0)
{
GtkWidget *widget;
GtkWidget *label;
AtkRelationSet *set;
AtkRelation *relation;
GPtrArray *target;
gpointer target_object;
guint key_val;
range = GAIL_RANGE (action);
widget = GTK_ACCESSIBLE (range)->widget;
if (widget == NULL)
return NULL;
set = atk_object_ref_relation_set (ATK_OBJECT (action));
if (!set)
return NULL;
label = NULL;
relation = atk_relation_set_get_relation_by_type (set, ATK_RELATION_LABELLED_BY);
if (relation)
{
target = atk_relation_get_target (relation);
target_object = g_ptr_array_index (target, 0);
if (GTK_IS_ACCESSIBLE (target_object))
label = GTK_ACCESSIBLE (target_object)->widget;
}
g_object_unref (set);
if (GTK_IS_LABEL (label))
{
key_val = gtk_label_get_mnemonic_keyval (GTK_LABEL (label));
if (key_val != GDK_VoidSymbol)
return_value = gtk_accelerator_name (key_val, GDK_MOD1_MASK);
}
g_free (range->activate_keybinding);
range->activate_keybinding = return_value;
}
return return_value;
}
static const gchar*
gail_range_action_get_name (AtkAction *action,
gint i)
{
const gchar *return_value;
if (i==0)
return_value = "activate";
else
return_value = NULL;
return return_value;
}
static gboolean
gail_range_set_description (AtkAction *action,
gint i,
const gchar *desc)
{
GailRange *range;
gchar **value;
range = GAIL_RANGE (action);
if (i==0)
value = &range->activate_description;
else
value = NULL;
if (value)
{
g_free (*value);
*value = g_strdup (desc);
return TRUE;
}
else
return FALSE;
}