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Add GtkStackAccessible

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Show only the currently visible child to a11y.
This commit is contained in:
Timm Bäder 2016-05-29 13:51:02 +02:00
parent 5029e11473
commit 0b0d4765a0
5 changed files with 205 additions and 0 deletions
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3
gtk/a11y/Makefile.inc
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@ -42,6 +42,8 @@ a11y_h_sources = \
a11y/gtkspinbuttonaccessible.h \
a11y/gtkspinneraccessible.h \
a11y/gtkstatusbaraccessible.h \
a11y/gtkstackaccessible.h \
a11y/gtkstackaccessibleprivate.h \
a11y/gtkswitchaccessible.h \
a11y/gtktextcellaccessible.h \
a11y/gtktextviewaccessible.h \
@ -114,6 +116,7 @@ a11y_c_sources = \
a11y/gtkspinbuttonaccessible.c \
a11y/gtkspinneraccessible.c \
a11y/gtkstatusbaraccessible.c \
a11y/gtkstackaccessible.c \
a11y/gtkswitchaccessible.c \
a11y/gtktextcellaccessible.c \
a11y/gtktextviewaccessible.c \

109
gtk/a11y/gtkstackaccessible.c Normal file
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@ -0,0 +1,109 @@
/* GTK+ - accessibility implementations
* Copyright (C) 2016 Timm Bäder <mail@baedert.org>
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.h>
#include <gtk/gtk.h>
#include "gtkstackaccessible.h"
#include "gtkwidgetprivate.h"
G_DEFINE_TYPE (GtkStackAccessible, gtk_stack_accessible, GTK_TYPE_CONTAINER_ACCESSIBLE)
static AtkObject*
gtk_stack_accessible_ref_child (AtkObject *obj,
int i)
{
GtkWidget *stack = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
GtkWidget *visible_child;
if (stack == NULL)
return NULL;
if (i != 0)
return NULL;
visible_child = gtk_stack_get_visible_child (GTK_STACK (stack));
if (visible_child == NULL)
return NULL;
return g_object_ref (gtk_widget_get_accessible (visible_child));
}
static int
gtk_stack_accessible_get_n_children (AtkObject *obj)
{
GtkWidget *stack = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
if (stack == NULL)
return 0;
if (gtk_stack_get_visible_child (GTK_STACK (stack)))
return 1;
return 0;
}
static void
gtk_stack_accessible_class_init (GtkStackAccessibleClass *klass)
{
AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
GtkContainerAccessibleClass *container_class = (GtkContainerAccessibleClass*)klass;
class->get_n_children = gtk_stack_accessible_get_n_children;
class->ref_child = gtk_stack_accessible_ref_child;
/*
* As we report the stack as having only the visible child,
* we are not interested in add and remove signals
*/
container_class->add_gtk = NULL;
container_class->remove_gtk = NULL;
}
static void
gtk_stack_accessible_init (GtkStackAccessible *bar) {}
void
gtk_stack_accessible_update_visible_child (GtkStack *stack,
GtkWidget *old_visible_child,
GtkWidget *new_visible_child)
{
AtkObject *stack_accessible = _gtk_widget_peek_accessible (GTK_WIDGET (stack));
if (stack_accessible == NULL)
return;
if (old_visible_child)
{
AtkObject *accessible = gtk_widget_get_accessible (old_visible_child);
g_object_notify (G_OBJECT (accessible), "accessible-parent");
g_signal_emit_by_name (stack_accessible, "children-changed::remove", 0, accessible, NULL);
}
if (new_visible_child)
{
AtkObject *accessible = gtk_widget_get_accessible (new_visible_child);
g_object_notify (G_OBJECT (accessible), "accessible-parent");
g_signal_emit_by_name (stack_accessible, "children-changed::add", 0, accessible, NULL);
}
}

54
gtk/a11y/gtkstackaccessible.h Normal file
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@ -0,0 +1,54 @@
/* GTK+ - accessibility implementations
* Copyright (C) 2016 Timm Bäder <mail@baedert.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __GTK_STACK_ACCESSIBLE_H__
#define __GTK_STACK_ACCESSIBLE_H__
#if !defined (__GTK_A11Y_H_INSIDE__) && !defined (GTK_COMPILATION)
#error "Only <gtk/gtk-a11y.h> can be included directly."
#endif
#include <gtk/a11y/gtkcontaineraccessible.h>
G_BEGIN_DECLS
#define GTK_TYPE_STACK_ACCESSIBLE (gtk_stack_accessible_get_type ())
#define GTK_STACK_ACCESSIBLE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_STACK_ACCESSIBLE, GtkStackAccessible))
#define GTK_STACK_ACCESSIBLE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_STACK_ACCESSIBLE, GtkStackAccessibleClass))
#define GTK_IS_STACK_ACCESSIBLE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_STACK_ACCESSIBLE))
#define GTK_IS_STACK_ACCESSIBLE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_STACK_ACCESSIBLE))
#define GTK_STACK_ACCESSIBLE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_STACK_ACCESSIBLE, GtkStackAccessibleClass))
typedef struct _GtkStackAccessible GtkStackAccessible;
typedef struct _GtkStackAccessibleClass GtkStackAccessibleClass;
struct _GtkStackAccessible
{
GtkContainerAccessible parent;
};
struct _GtkStackAccessibleClass
{
GtkContainerAccessibleClass parent_class;
};
GDK_AVAILABLE_IN_3_22
GType gtk_stack_accessible_get_type (void);
G_END_DECLS
#endif

32
gtk/a11y/gtkstackaccessibleprivate.h Normal file
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@ -0,0 +1,32 @@
/* GTK+ - accessibility implementations
* Copyright (C) 2016 Timm Bäder <mail@baedert.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __GTK_STACK_ACCESSIBLE_PRIVATE_H__
#define __GTK_STACK_ACCESSIBLE_PRIVATE_H__
#include <gtk/a11y/gtkcontaineraccessible.h>
G_BEGIN_DECLS
void gtk_stack_accessible_update_visible_child (GtkStack *stack,
GtkWidget *old_visible_child,
GtkWidget *new_visible_child);
G_END_DECLS
#endif /* __GTK_STACK_ACCESSIBLE_PRIVATE_H__ */

7
gtk/gtkstack.c
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@ -30,6 +30,8 @@
#include "gtkprogresstrackerprivate.h"
#include "gtksettingsprivate.h"
#include "gtkwidgetprivate.h"
#include "a11y/gtkstackaccessible.h"
#include "a11y/gtkstackaccessibleprivate.h"
#include <math.h>
#include <string.h>
@ -557,6 +559,7 @@ gtk_stack_class_init (GtkStackClass *klass)
gtk_container_class_install_child_properties (container_class, LAST_CHILD_PROP, stack_child_props);
gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_STACK_ACCESSIBLE);
gtk_widget_class_set_css_name (widget_class, "stack");
}
@ -1116,6 +1119,10 @@ set_visible_child (GtkStack *stack,
}
}
gtk_stack_accessible_update_visible_child (stack,
priv->visible_child ? priv->visible_child->widget : NULL,
child_info ? child_info->widget : NULL);
priv->visible_child = child_info;
if (child_info)