Daemonratte
a116a5d13b
Add compile-time support for the modern AtkValue API available since ATK 2.12 while retaining compatibility with older ATK versions. Implement direct modern value, range, increment and setter methods for adjustments, paned widgets, progress bars, ranges, scale buttons and spin buttons. Keep the implementation private, avoid per-instance memory overhead and preserve the existing exported ABI.
322 lines
10 KiB
C
322 lines
10 KiB
C
/* GAIL - The GNOME Accessibility Implementation Library
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* Copyright 2008 Jan Arne Petersen
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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 <gtk/gtk.h>
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#include "gailscalebutton.h"
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#include "gailvalue.h"
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#include "gailadjustment.h"
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#include "gail-private-macros.h"
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#include <string.h>
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static void gail_scale_button_class_init (GailScaleButtonClass *klass);
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static void gail_scale_button_init (GailScaleButton *button);
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/* GailWidget */
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static void gail_scale_button_notify_gtk (GObject *obj,
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GParamSpec *pspec);
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/* AtkObject */
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static void gail_scale_button_initialize (AtkObject *obj,
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gpointer data);
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/* AtkAction */
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static void atk_action_interface_init (AtkActionIface *iface);
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static gboolean gail_scale_button_do_action (AtkAction *action,
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gint i);
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static gint gail_scale_button_get_n_actions (AtkAction *action);
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static const gchar* gail_scale_button_get_description(AtkAction *action,
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gint i);
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static const gchar* gail_scale_button_action_get_name(AtkAction *action,
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gint i);
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static const gchar* gail_scale_button_get_keybinding (AtkAction *action,
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gint i);
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static gboolean gail_scale_button_set_description(AtkAction *action,
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gint i,
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const gchar *desc);
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/* AtkValue */
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static void atk_value_interface_init (AtkValueIface *iface);
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static void gail_scale_button_get_current_value (AtkValue *obj,
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GValue *value);
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static void gail_scale_button_get_maximum_value (AtkValue *obj,
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GValue *value);
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static void gail_scale_button_get_minimum_value (AtkValue *obj,
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GValue *value);
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static void gail_scale_button_get_minimum_increment (AtkValue *obj,
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GValue *value);
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static gboolean gail_scale_button_set_current_value (AtkValue *obj,
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const GValue *value);
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#ifdef HAVE_ATK_VALUE_2_12
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#define GAIL_SCALE_BUTTON_ADJUSTMENT(obj) \
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(GTK_ACCESSIBLE (obj)->widget != NULL \
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? gtk_scale_button_get_adjustment ( \
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GTK_SCALE_BUTTON (GTK_ACCESSIBLE (obj)->widget)) : NULL)
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GAIL_DEFINE_ADJUSTMENT_VALUE_READERS (
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gail_scale_button, GAIL_SCALE_BUTTON_ADJUSTMENT (obj),
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gtk_scale_button_get_value (
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GTK_SCALE_BUTTON (GTK_ACCESSIBLE (obj)->widget)),
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adjustment->upper)
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GAIL_DEFINE_ADJUSTMENT_VALUE_INCREMENT (
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gail_scale_button, GAIL_SCALE_BUTTON_ADJUSTMENT (obj),
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adjustment->step_increment)
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GAIL_DEFINE_WIDGET_VALUE_SETTER (
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gail_scale_button, GTK_SCALE_BUTTON, gtk_scale_button_set_value, value)
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#endif
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G_DEFINE_TYPE_WITH_CODE (GailScaleButton, gail_scale_button, GAIL_TYPE_BUTTON,
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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_scale_button_class_init (GailScaleButtonClass *klass)
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{
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AtkObjectClass *atk_object_class = ATK_OBJECT_CLASS (klass);
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GailWidgetClass *widget_class = GAIL_WIDGET_CLASS (klass);
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atk_object_class->initialize = gail_scale_button_initialize;
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widget_class->notify_gtk = gail_scale_button_notify_gtk;
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}
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static void
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gail_scale_button_init (GailScaleButton *button)
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{
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}
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static void
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gail_scale_button_initialize (AtkObject *obj,
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gpointer data)
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{
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ATK_OBJECT_CLASS (gail_scale_button_parent_class)->initialize (obj, data);
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obj->role = ATK_ROLE_SLIDER;
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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_scale_button_do_action;
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iface->get_n_actions = gail_scale_button_get_n_actions;
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iface->get_description = gail_scale_button_get_description;
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iface->get_keybinding = gail_scale_button_get_keybinding;
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iface->get_name = gail_scale_button_action_get_name;
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iface->set_description = gail_scale_button_set_description;
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}
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static gboolean
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gail_scale_button_do_action(AtkAction *action,
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gint i)
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{
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GtkWidget *widget;
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widget = GTK_ACCESSIBLE (action)->widget;
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if (widget == NULL)
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return FALSE;
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if (!gtk_widget_is_sensitive (widget) || !gtk_widget_get_visible (widget))
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return FALSE;
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switch (i) {
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case 0:
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g_signal_emit_by_name (widget, "popup");
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return TRUE;
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case 1:
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g_signal_emit_by_name (widget, "podown");
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return TRUE;
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default:
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return FALSE;
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}
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}
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static gint
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gail_scale_button_get_n_actions (AtkAction *action)
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{
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return 2;
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}
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static const gchar*
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gail_scale_button_get_description (AtkAction *action,
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gint i)
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{
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return NULL;
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}
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static const gchar*
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gail_scale_button_action_get_name (AtkAction *action,
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gint i)
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{
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switch (i) {
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case 0:
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return "popup";
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case 1:
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return "popdown";
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default:
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return NULL;
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}
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}
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static const gchar*
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gail_scale_button_get_keybinding (AtkAction *action,
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gint i)
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{
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return NULL;
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}
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static gboolean
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gail_scale_button_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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return FALSE;
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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_scale_button_get_current_value;
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iface->get_maximum_value = gail_scale_button_get_maximum_value;
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iface->get_minimum_value = gail_scale_button_get_minimum_value;
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iface->get_minimum_increment = gail_scale_button_get_minimum_increment;
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iface->set_current_value = gail_scale_button_set_current_value;
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#ifdef HAVE_ATK_VALUE_2_12
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iface->get_value_and_text = gail_scale_button_get_value_and_text;
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iface->get_range = gail_scale_button_get_range;
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iface->get_increment = gail_scale_button_get_increment;
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iface->set_value = gail_scale_button_set_value;
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#endif
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}
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static void
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gail_scale_button_get_current_value (AtkValue *obj,
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GValue *value)
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{
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GtkScaleButton *gtk_scale_button;
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g_return_if_fail (GAIL_IS_SCALE_BUTTON (obj));
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gtk_scale_button = GTK_SCALE_BUTTON (GTK_ACCESSIBLE (obj)->widget);
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g_value_set_double (g_value_init (value, G_TYPE_DOUBLE),
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gtk_scale_button_get_value (gtk_scale_button));
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}
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static void
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gail_scale_button_get_maximum_value (AtkValue *obj,
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GValue *value)
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{
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GtkWidget *gtk_widget;
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GtkAdjustment *adj;
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g_return_if_fail (GAIL_IS_SCALE_BUTTON (obj));
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gtk_widget = GTK_ACCESSIBLE (obj)->widget;
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if (gtk_widget == NULL)
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return;
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adj = gtk_scale_button_get_adjustment (GTK_SCALE_BUTTON (gtk_widget));
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if (adj != NULL)
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g_value_set_double (g_value_init (value, G_TYPE_DOUBLE),
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adj->upper);
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}
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static void
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gail_scale_button_get_minimum_value (AtkValue *obj,
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GValue *value)
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{
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GtkWidget *gtk_widget;
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GtkAdjustment *adj;
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g_return_if_fail (GAIL_IS_SCALE_BUTTON (obj));
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gtk_widget = GTK_ACCESSIBLE (obj)->widget;
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if (gtk_widget == NULL)
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return;
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adj = gtk_scale_button_get_adjustment (GTK_SCALE_BUTTON (gtk_widget));
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if (adj != NULL)
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g_value_set_double (g_value_init (value, G_TYPE_DOUBLE),
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adj->lower);
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}
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static void
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gail_scale_button_get_minimum_increment (AtkValue *obj,
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GValue *value)
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{
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GtkWidget *gtk_widget;
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GtkAdjustment *adj;
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g_return_if_fail (GAIL_IS_SCALE_BUTTON (obj));
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gtk_widget = GTK_ACCESSIBLE (obj)->widget;
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if (gtk_widget == NULL)
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return;
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adj = gtk_scale_button_get_adjustment (GTK_SCALE_BUTTON (gtk_widget));
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if (adj != NULL)
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g_value_set_double (g_value_init (value, G_TYPE_DOUBLE),
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adj->step_increment);
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}
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static gboolean
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gail_scale_button_set_current_value (AtkValue *obj,
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const GValue *value)
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{
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GtkWidget *gtk_widget;
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g_return_val_if_fail (GAIL_IS_SCALE_BUTTON (obj), FALSE);
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gtk_widget = GTK_ACCESSIBLE (obj)->widget;
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if (gtk_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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gtk_scale_button_set_value (GTK_SCALE_BUTTON (gtk_widget), g_value_get_double (value));
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return TRUE;
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}
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return FALSE;
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}
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static void
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gail_scale_button_notify_gtk (GObject *obj,
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GParamSpec *pspec)
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{
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GtkScaleButton *gtk_scale_button;
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GailScaleButton *scale_button;
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g_return_if_fail (GTK_IS_SCALE_BUTTON (obj));
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gtk_scale_button = GTK_SCALE_BUTTON (obj);
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scale_button = GAIL_SCALE_BUTTON (gtk_widget_get_accessible (GTK_WIDGET (gtk_scale_button)));
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if (strcmp (pspec->name, "value") == 0)
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{
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g_object_notify (G_OBJECT (scale_button), "accessible-value");
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}
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else
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{
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GAIL_WIDGET_CLASS (gail_scale_button_parent_class)->notify_gtk (obj, pspec);
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}
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}
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