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gtk/modules/other/gail/gailscalebutton.c

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/* GAIL - The GNOME Accessibility Implementation Library
* Copyright 2008 Jan Arne Petersen
*
* 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 <gtk/gtk.h>
#include "gailscalebutton.h"
#include "gailadjustment.h"
#include "gail-private-macros.h"
#include <string.h>
static void gail_scale_button_class_init (GailScaleButtonClass *klass);
static void gail_scale_button_init (GailScaleButton *button);
/* GailWidget */
static void gail_scale_button_notify_gtk (GObject *obj,
GParamSpec *pspec);
/* AtkObject */
static void gail_scale_button_initialize (AtkObject *obj,
gpointer data);
/* AtkAction */
static void atk_action_interface_init (AtkActionIface *iface);
static gboolean gail_scale_button_do_action (AtkAction *action,
gint i);
static gint gail_scale_button_get_n_actions (AtkAction *action);
static G_CONST_RETURN gchar* gail_scale_button_get_description(AtkAction *action,
gint i);
static G_CONST_RETURN gchar* gail_scale_button_action_get_name(AtkAction *action,
gint i);
static G_CONST_RETURN gchar* gail_scale_button_get_keybinding (AtkAction *action,
gint i);
static gboolean gail_scale_button_set_description(AtkAction *action,
gint i,
const gchar *desc);
/* AtkValue */
static void atk_value_interface_init (AtkValueIface *iface);
static void gail_scale_button_get_current_value (AtkValue *obj,
GValue *value);
static void gail_scale_button_get_maximum_value (AtkValue *obj,
GValue *value);
static void gail_scale_button_get_minimum_value (AtkValue *obj,
GValue *value);
static void gail_scale_button_get_minimum_increment (AtkValue *obj,
GValue *value);
static gboolean gail_scale_button_set_current_value (AtkValue *obj,
const GValue *value);
G_DEFINE_TYPE_WITH_CODE (GailScaleButton, gail_scale_button, GAIL_TYPE_BUTTON,
G_IMPLEMENT_INTERFACE (ATK_TYPE_ACTION, atk_action_interface_init)
G_IMPLEMENT_INTERFACE (ATK_TYPE_VALUE, atk_value_interface_init));
static void
gail_scale_button_class_init (GailScaleButtonClass *klass)
{
AtkObjectClass *atk_object_class = ATK_OBJECT_CLASS (klass);
GailWidgetClass *widget_class = GAIL_WIDGET_CLASS (klass);
atk_object_class->initialize = gail_scale_button_initialize;
widget_class->notify_gtk = gail_scale_button_notify_gtk;
}
static void
gail_scale_button_init (GailScaleButton *button)
{
}
static void
gail_scale_button_initialize (AtkObject *obj,
gpointer data)
{
ATK_OBJECT_CLASS (gail_scale_button_parent_class)->initialize (obj, data);
obj->role = ATK_ROLE_SLIDER;
}
static void
atk_action_interface_init (AtkActionIface *iface)
{
iface->do_action = gail_scale_button_do_action;
iface->get_n_actions = gail_scale_button_get_n_actions;
iface->get_description = gail_scale_button_get_description;
iface->get_keybinding = gail_scale_button_get_keybinding;
iface->get_name = gail_scale_button_action_get_name;
iface->set_description = gail_scale_button_set_description;
}
static gboolean
gail_scale_button_do_action(AtkAction *action,
gint i)
{
GtkWidget *widget;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (action));
if (widget == NULL)
return FALSE;
if (!gtk_widget_is_sensitive (widget) || !gtk_widget_get_visible (widget))
return FALSE;
switch (i) {
case 0:
g_signal_emit_by_name (widget, "popup");
return TRUE;
case 1:
g_signal_emit_by_name (widget, "podown");
return TRUE;
default:
return FALSE;
}
}
static gint
gail_scale_button_get_n_actions (AtkAction *action)
{
return 2;
}
static G_CONST_RETURN gchar*
gail_scale_button_get_description (AtkAction *action,
gint i)
{
return NULL;
}
static G_CONST_RETURN gchar*
gail_scale_button_action_get_name (AtkAction *action,
gint i)
{
switch (i) {
case 0:
return "popup";
case 1:
return "popdown";
default:
return NULL;
}
}
static G_CONST_RETURN gchar*
gail_scale_button_get_keybinding (AtkAction *action,
gint i)
{
return NULL;
}
static gboolean
gail_scale_button_set_description (AtkAction *action,
gint i,
const gchar *desc)
{
return FALSE;
}
static void
atk_value_interface_init (AtkValueIface *iface)
{
iface->get_current_value = gail_scale_button_get_current_value;
iface->get_maximum_value = gail_scale_button_get_maximum_value;
iface->get_minimum_value = gail_scale_button_get_minimum_value;
iface->get_minimum_increment = gail_scale_button_get_minimum_increment;
iface->set_current_value = gail_scale_button_set_current_value;
}
static void
gail_scale_button_get_current_value (AtkValue *obj,
GValue *value)
{
GtkScaleButton *gtk_scale_button;
g_return_if_fail (GAIL_IS_SCALE_BUTTON (obj));
gtk_scale_button = GTK_SCALE_BUTTON (gtk_accessible_get_widget (GTK_ACCESSIBLE (obj)));
g_value_set_double (g_value_init (value, G_TYPE_DOUBLE),
gtk_scale_button_get_value (gtk_scale_button));
}
static void
gail_scale_button_get_maximum_value (AtkValue *obj,
GValue *value)
{
GtkWidget *gtk_widget;
GtkAdjustment *adj;
g_return_if_fail (GAIL_IS_SCALE_BUTTON (obj));
gtk_widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
if (gtk_widget == NULL)
return;
adj = gtk_scale_button_get_adjustment (GTK_SCALE_BUTTON (gtk_widget));
if (adj != NULL)
g_value_set_double (g_value_init (value, G_TYPE_DOUBLE),
adj->upper);
}
static void
gail_scale_button_get_minimum_value (AtkValue *obj,
GValue *value)
{
GtkWidget *gtk_widget;
GtkAdjustment *adj;
g_return_if_fail (GAIL_IS_SCALE_BUTTON (obj));
gtk_widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
if (gtk_widget == NULL)
return;
adj = gtk_scale_button_get_adjustment (GTK_SCALE_BUTTON (gtk_widget));
if (adj != NULL)
g_value_set_double (g_value_init (value, G_TYPE_DOUBLE),
adj->lower);
}
static void
gail_scale_button_get_minimum_increment (AtkValue *obj,
GValue *value)
{
GtkWidget *gtk_widget;
GtkAdjustment *adj;
g_return_if_fail (GAIL_IS_SCALE_BUTTON (obj));
gtk_widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
if (gtk_widget == NULL)
return;
adj = gtk_scale_button_get_adjustment (GTK_SCALE_BUTTON (gtk_widget));
if (adj != NULL)
g_value_set_double (g_value_init (value, G_TYPE_DOUBLE),
adj->step_increment);
}
static gboolean
gail_scale_button_set_current_value (AtkValue *obj,
const GValue *value)
{
GtkWidget *gtk_widget;
g_return_val_if_fail (GAIL_IS_SCALE_BUTTON (obj), FALSE);
gtk_widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
if (gtk_widget == NULL)
return FALSE;
if (G_VALUE_HOLDS_DOUBLE (value))
{
gtk_scale_button_set_value (GTK_SCALE_BUTTON (gtk_widget), g_value_get_double (value));
return TRUE;
}
return FALSE;
}
static void
gail_scale_button_notify_gtk (GObject *obj,
GParamSpec *pspec)
{
GtkScaleButton *gtk_scale_button;
GailScaleButton *scale_button;
g_return_if_fail (GTK_IS_SCALE_BUTTON (obj));
gtk_scale_button = GTK_SCALE_BUTTON (obj);
scale_button = GAIL_SCALE_BUTTON (gtk_widget_get_accessible (GTK_WIDGET (gtk_scale_button)));
if (strcmp (pspec->name, "value") == 0)
{
g_object_notify (G_OBJECT (scale_button), "accessible-value");
}
else
{
GAIL_WIDGET_CLASS (gail_scale_button_parent_class)->notify_gtk (obj, pspec);
}
}
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