496 lines
14 KiB
C
496 lines
14 KiB
C
/* 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 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 G_CONST_RETURN gchar* gail_range_get_description (AtkAction *action,
|
|
gint i);
|
|
static G_CONST_RETURN gchar* gail_range_get_keybinding (AtkAction *action,
|
|
gint i);
|
|
static G_CONST_RETURN 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->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);
|
|
GtkAdjustment *adj;
|
|
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
|
|
*/
|
|
adj = gtk_range_get_adjustment (gtk_range);
|
|
if (adj)
|
|
{
|
|
range->adjustment = gail_adjustment_new (adj);
|
|
g_signal_connect (adj,
|
|
"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 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_get_widget (GTK_ACCESSIBLE (obj));
|
|
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)
|
|
{
|
|
GtkAdjustment *adj;
|
|
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
|
|
*/
|
|
adj = gtk_range_get_adjustment (GTK_RANGE (widget));
|
|
range->adjustment = gail_adjustment_new (adj);
|
|
g_signal_connect (adj,
|
|
"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_get_widget (GTK_ACCESSIBLE (action));
|
|
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_get_widget (GTK_ACCESSIBLE (range));
|
|
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 G_CONST_RETURN gchar*
|
|
gail_range_get_description (AtkAction *action,
|
|
gint i)
|
|
{
|
|
GailRange *range;
|
|
G_CONST_RETURN gchar *return_value;
|
|
|
|
range = GAIL_RANGE (action);
|
|
if (i==0)
|
|
return_value = range->activate_description;
|
|
else
|
|
return_value = NULL;
|
|
return return_value;
|
|
}
|
|
|
|
static G_CONST_RETURN 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_get_widget (GTK_ACCESSIBLE (range));
|
|
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);
|
|
label = gtk_accessible_get_widget (GTK_ACCESSIBLE (target_object));
|
|
}
|
|
g_object_unref (set);
|
|
if (GTK_IS_LABEL (label))
|
|
{
|
|
key_val = gtk_label_get_mnemonic_keyval (GTK_LABEL (label));
|
|
if (key_val != GDK_KEY_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 G_CONST_RETURN gchar*
|
|
gail_range_action_get_name (AtkAction *action,
|
|
gint i)
|
|
{
|
|
G_CONST_RETURN 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;
|
|
}
|
|
|
|
|