forked from AuroraMiddleware/gtk
306 lines
9.0 KiB
C
306 lines
9.0 KiB
C
/* GTK+ - accessibility implementations
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* Copyright 2001, 2002, 2003 Sun Microsystems Inc.
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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, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <string.h>
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#include <gtk/gtk.h>
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#include "gtkrangeaccessible.h"
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typedef struct
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{
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GtkAdjustment *adjustment;
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gulong value_changed_id;
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} GtkRangeAccessiblePrivate;
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static void atk_value_interface_init (AtkValueIface *iface);
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G_DEFINE_TYPE_WITH_CODE (GtkRangeAccessible, gtk_range_accessible, GTK_TYPE_WIDGET_ACCESSIBLE,
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G_ADD_PRIVATE (GtkRangeAccessible)
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G_IMPLEMENT_INTERFACE (ATK_TYPE_VALUE, atk_value_interface_init))
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static void
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gtk_range_accessible_value_changed (GtkAdjustment *adjustment,
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gpointer data)
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{
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g_object_notify (G_OBJECT (data), "accessible-value");
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}
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static void
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gtk_range_accessible_widget_set (GtkAccessible *accessible)
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{
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GtkRangeAccessible *self = GTK_RANGE_ACCESSIBLE (accessible);
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GtkRangeAccessiblePrivate *priv = gtk_range_accessible_get_instance_private (self);
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GtkWidget *range;
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GtkAdjustment *adj;
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range = gtk_accessible_get_widget (accessible);
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adj = gtk_range_get_adjustment (GTK_RANGE (range));
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if (adj != NULL)
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{
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priv->adjustment = g_object_ref (adj);
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priv->value_changed_id =
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g_signal_connect (priv->adjustment, "value-changed",
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G_CALLBACK (gtk_range_accessible_value_changed),
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self);
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}
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}
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static void
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gtk_range_accessible_widget_unset (GtkAccessible *accessible)
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{
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GtkRangeAccessible *self = GTK_RANGE_ACCESSIBLE (accessible);
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GtkRangeAccessiblePrivate *priv = gtk_range_accessible_get_instance_private (self);
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if (priv->adjustment != NULL &&
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priv->value_changed_id != 0)
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{
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g_signal_handler_disconnect (priv->adjustment, priv->value_changed_id);
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priv->value_changed_id = 0;
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}
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g_clear_object (&priv->adjustment);
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}
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void
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gtk_range_accessible_update_adjustment (GtkRangeAccessible *self)
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{
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gtk_range_accessible_widget_unset (GTK_ACCESSIBLE (self));
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gtk_range_accessible_widget_set (GTK_ACCESSIBLE (self));
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}
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static void
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gtk_range_accessible_initialize (AtkObject *obj,
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gpointer data)
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{
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ATK_OBJECT_CLASS (gtk_range_accessible_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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gtk_range_accessible_dispose (GObject *gobject)
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{
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GtkRangeAccessible *self = GTK_RANGE_ACCESSIBLE (gobject);
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GtkRangeAccessiblePrivate *priv = gtk_range_accessible_get_instance_private (self);
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if (priv->adjustment != NULL && priv->value_changed_id != 0)
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{
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g_signal_handler_disconnect (priv->adjustment, priv->value_changed_id);
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priv->value_changed_id = 0;
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}
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g_clear_object (&priv->adjustment);
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G_OBJECT_CLASS (gtk_range_accessible_parent_class)->dispose (gobject);
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}
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static void
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gtk_range_accessible_class_init (GtkRangeAccessibleClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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AtkObjectClass *atkobject_class = ATK_OBJECT_CLASS (klass);
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GtkAccessibleClass *accessible_class = (GtkAccessibleClass*)klass;
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gobject_class->dispose = gtk_range_accessible_dispose;
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atkobject_class->initialize = gtk_range_accessible_initialize;
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accessible_class->widget_set = gtk_range_accessible_widget_set;
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accessible_class->widget_unset = gtk_range_accessible_widget_unset;
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}
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static void
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gtk_range_accessible_init (GtkRangeAccessible *range)
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{
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}
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static void
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gtk_range_accessible_get_current_value (AtkValue *obj,
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GValue *value)
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{
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GtkWidget *widget;
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GtkAdjustment *adjustment;
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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
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adjustment = gtk_range_get_adjustment (GTK_RANGE (widget));
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if (adjustment == NULL)
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return;
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memset (value, 0, sizeof (GValue));
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g_value_init (value, G_TYPE_DOUBLE);
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g_value_set_double (value, gtk_adjustment_get_value (adjustment));
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}
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static void
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gtk_range_accessible_get_maximum_value (AtkValue *obj,
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GValue *value)
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{
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GtkWidget *widget;
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GtkAdjustment *adjustment;
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gdouble max;
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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
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adjustment = gtk_range_get_adjustment (GTK_RANGE (widget));
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if (adjustment == NULL)
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return;
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max = gtk_adjustment_get_upper (adjustment)
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- gtk_adjustment_get_page_size (adjustment);
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if (gtk_range_get_restrict_to_fill_level (GTK_RANGE (widget)))
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max = MIN (max, gtk_range_get_fill_level (GTK_RANGE (widget)));
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memset (value, 0, sizeof (GValue));
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g_value_init (value, G_TYPE_DOUBLE);
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g_value_set_double (value, max);
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}
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static void
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gtk_range_accessible_get_minimum_value (AtkValue *obj,
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GValue *value)
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{
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GtkWidget *widget;
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GtkAdjustment *adjustment;
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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
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adjustment = gtk_range_get_adjustment (GTK_RANGE (widget));
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if (adjustment == NULL)
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return;
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memset (value, 0, sizeof (GValue));
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g_value_init (value, G_TYPE_DOUBLE);
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g_value_set_double (value, gtk_adjustment_get_lower (adjustment));
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}
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static void
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gtk_range_accessible_get_minimum_increment (AtkValue *obj,
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GValue *value)
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{
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GtkWidget *widget;
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GtkAdjustment *adjustment;
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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
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adjustment = gtk_range_get_adjustment (GTK_RANGE (widget));
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if (adjustment == NULL)
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return;
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memset (value, 0, sizeof (GValue));
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g_value_init (value, G_TYPE_DOUBLE);
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g_value_set_double (value, gtk_adjustment_get_minimum_increment (adjustment));
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}
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static gboolean
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gtk_range_accessible_set_current_value (AtkValue *obj,
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const GValue *value)
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{
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GtkWidget *widget;
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GtkAdjustment *adjustment;
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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
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adjustment = gtk_range_get_adjustment (GTK_RANGE (widget));
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if (adjustment == NULL)
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return FALSE;
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gtk_adjustment_set_value (adjustment, g_value_get_double (value));
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return TRUE;
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}
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static void
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gtk_range_accessible_get_value_and_text (AtkValue *obj,
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gdouble *value,
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gchar **text)
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{
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GtkWidget *widget;
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GtkAdjustment *adjustment;
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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
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adjustment = gtk_range_get_adjustment (GTK_RANGE (widget));
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if (adjustment == NULL)
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return;
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*value = gtk_adjustment_get_value (adjustment);
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*text = NULL;
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}
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static AtkRange *
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gtk_range_accessible_get_range (AtkValue *obj)
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{
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GtkWidget *widget;
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GtkAdjustment *adjustment;
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gdouble min, max;
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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
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adjustment = gtk_range_get_adjustment (GTK_RANGE (widget));
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if (adjustment == NULL)
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return NULL;
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min = gtk_adjustment_get_lower (adjustment);
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max = gtk_adjustment_get_upper (adjustment)
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- gtk_adjustment_get_page_size (adjustment);
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if (gtk_range_get_restrict_to_fill_level (GTK_RANGE (widget)))
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max = MIN (max, gtk_range_get_fill_level (GTK_RANGE (widget)));
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return atk_range_new (min, max, NULL);
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}
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static void
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gtk_range_accessible_set_value (AtkValue *obj,
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const gdouble value)
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{
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GtkWidget *widget;
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GtkAdjustment *adjustment;
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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
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adjustment = gtk_range_get_adjustment (GTK_RANGE (widget));
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if (adjustment == NULL)
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return;
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gtk_adjustment_set_value (adjustment, value);
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}
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static gdouble
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gtk_range_accessible_get_increment (AtkValue *obj)
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{
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GtkWidget *widget;
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GtkAdjustment *adjustment;
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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
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adjustment = gtk_range_get_adjustment (GTK_RANGE (widget));
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if (adjustment == NULL)
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return 0;
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return gtk_adjustment_get_minimum_increment (adjustment);
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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 = gtk_range_accessible_get_current_value;
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iface->get_maximum_value = gtk_range_accessible_get_maximum_value;
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iface->get_minimum_value = gtk_range_accessible_get_minimum_value;
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iface->get_minimum_increment = gtk_range_accessible_get_minimum_increment;
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iface->set_current_value = gtk_range_accessible_set_current_value;
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iface->get_value_and_text = gtk_range_accessible_get_value_and_text;
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iface->get_range = gtk_range_accessible_get_range;
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iface->set_value = gtk_range_accessible_set_value;
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iface->get_increment = gtk_range_accessible_get_increment;
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}
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