forked from AuroraMiddleware/gtk
332 lines
10 KiB
C
332 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 "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_real_notify_gtk (GObject *obj,
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GParamSpec *pspec);
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/* AtkObject */
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static void gail_scale_button_real_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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/* 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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static void gail_scale_button_value_changed (GtkAdjustment *adjustment,
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gpointer data);
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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_real_initialize;
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widget_class->notify_gtk = gail_scale_button_real_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_real_initialize (AtkObject *obj,
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gpointer data)
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{
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GailScaleButton *scale_button = GAIL_SCALE_BUTTON (obj);
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GtkScaleButton *gtk_scale_button;
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GtkAdjustment *gtk_adjustment;
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ATK_OBJECT_CLASS (gail_scale_button_parent_class)->initialize (obj, data);
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gtk_scale_button = GTK_SCALE_BUTTON (data);
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gtk_adjustment = gtk_scale_button_get_adjustment (gtk_scale_button);
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/*
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* If a GtkAdjustment already exists for the scale_button,
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* create the GailAdjustment
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*/
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if (gtk_adjustment)
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{
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scale_button->adjustment = gail_adjustment_new (gtk_adjustment);
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g_signal_connect (gtk_adjustment,
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"value-changed",
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G_CALLBACK (gail_scale_button_value_changed),
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obj);
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}
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else
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scale_button->adjustment = NULL;
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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_name = gail_scale_button_action_get_name;
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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_get_widget (GTK_ACCESSIBLE (action));
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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 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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}
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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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GailScaleButton *scale_button;
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g_return_if_fail (GAIL_IS_SCALE_BUTTON (obj));
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scale_button = GAIL_SCALE_BUTTON (obj);
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if (scale_button->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 (scale_button->adjustment), value);
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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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GailScaleButton *scale_button;
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g_return_if_fail (GAIL_IS_SCALE_BUTTON (obj));
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scale_button = GAIL_SCALE_BUTTON (obj);
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if (scale_button->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 (scale_button->adjustment), value);
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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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GailScaleButton *scale_button;
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g_return_if_fail (GAIL_IS_SCALE_BUTTON (obj));
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scale_button = GAIL_SCALE_BUTTON (obj);
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if (scale_button->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 (scale_button->adjustment), value);
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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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GailScaleButton *scale_button;
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g_return_if_fail (GAIL_IS_SCALE_BUTTON (obj));
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scale_button = GAIL_SCALE_BUTTON (obj);
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if (scale_button->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_increment (ATK_VALUE (scale_button->adjustment), value);
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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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GailScaleButton *scale_button;
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g_return_val_if_fail (GAIL_IS_SCALE_BUTTON (obj), FALSE);
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scale_button = GAIL_SCALE_BUTTON (obj);
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if (scale_button->adjustment == NULL)
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/*
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* Adjustment has not been specified
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*/
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return FALSE;
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return atk_value_set_current_value (ATK_VALUE (scale_button->adjustment), value);
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}
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static void
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gail_scale_button_real_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, "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 scale_button.
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*/
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GtkAdjustment* gtk_adjustment;
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if (scale_button->adjustment)
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{
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g_object_unref (scale_button->adjustment);
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scale_button->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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gtk_adjustment = gtk_scale_button_get_adjustment (gtk_scale_button);
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scale_button->adjustment = gail_adjustment_new (gtk_adjustment);
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g_signal_connect (gtk_adjustment,
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"value-changed",
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G_CALLBACK (gail_scale_button_value_changed),
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scale_button);
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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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static void
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gail_scale_button_value_changed (GtkAdjustment *adjustment,
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gpointer data)
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{
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GailScaleButton *scale_button;
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gail_return_if_fail (adjustment != NULL);
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gail_return_if_fail (data != NULL);
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scale_button = GAIL_SCALE_BUTTON (data);
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g_object_notify (G_OBJECT (scale_button), "accessible-value");
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}
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