Add accessibility to qml

This consists of two parts:
An attached property for QML items and a plugin for the accessibility framework.

The attached property simply takes care of some properties (name, role)
that are needed in order to expose semantics of the application to
assistive tools.

The plugin exposes the hierarchy of QML items to the
accessibility framework.

Change-Id: I32f5603d0d9549b01b3645b205b710b9801762f7
Reviewed-by: Jan-Arve Sæther <jan-arve.saether@nokia.com>

1 files changed, 137 insertions, 0 deletions

diff --git a/src/plugins/accessible/quick/qaccessiblequickview.cpp b/src/plugins/accessible/quick/qaccessiblequickview.cpp
new file mode 100644
index 0000000000..cd4b4937ec
--- /dev/null
+++ b/src/plugins/accessible/quick/qaccessiblequickview.cpp
@@ -0,0 +1,137 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qaccessiblequickview.h"
+
+#include <QtQuick/qquickitem.h>
+
+#include "qaccessiblequickitem.h"
+#include "qdeclarativeaccessible.h"
+
+#ifndef QT_NO_ACCESSIBILITY
+
+QT_BEGIN_NAMESPACE
+
+QAccessibleQuickView::QAccessibleQuickView(QQuickView *object)
+    :QAccessibleObject(object)
+{
+    m_view = static_cast<QQuickView *>(object);
+}
+
+int QAccessibleQuickView::childCount() const
+{
+    return m_view->rootItem() ? 1 : 0;
+}
+
+QAccessibleInterface *QAccessibleQuickView::parent() const
+{
+    // FIXME: for now we assume to be a top level window...
+    return QAccessible::queryAccessibleInterface(qApp);
+}
+
+QAccessibleInterface *QAccessibleQuickView::child(int index) const
+{
+    if (index == 0) {
+        QQuickItem *declarativeRoot = m_view->rootObject();
+        return new QAccessibleQuickItem(declarativeRoot);
+    }
+    return 0;
+}
+
+QAccessible::Role QAccessibleQuickView::role() const
+{
+    return QAccessible::Window; // FIXME
+}
+
+QAccessible::State QAccessibleQuickView::state() const
+{
+    return QAccessible::Normal; // FIXME
+}
+
+QRect QAccessibleQuickView::rect() const
+{
+    return QRect(m_view->x(), m_view->y(), m_view->width(), m_view->height());
+}
+
+int QAccessibleQuickView::navigate(QAccessible::RelationFlag rel, int entry, QAccessibleInterface **target) const
+{
+    switch (rel) {
+    case QAccessible::Child:
+        *target = child(entry - 1);
+    case QAccessible::Ancestor:
+        *target = parent();
+    default:
+        *target = 0;
+    }
+    return *target ? 0 : -1;
+}
+
+QString QAccessibleQuickView::text(QAccessible::Text text) const
+{
+#ifdef Q_ACCESSIBLE_QUICK_ITEM_ENABLE_DEBUG_DESCRIPTION
+    if (text == QAccessible::DebugDescription) {
+        return QString::fromAscii(object()->metaObject()->className()) ;
+    }
+#endif
+    return m_view->windowTitle();
+}
+
+QAccessibleInterface *QAccessibleQuickView::childAt(int x, int y) const
+{
+    Q_UNUSED(x);
+    Q_UNUSED(y);
+    return child(0); // return the top-level QML item
+}
+
+int QAccessibleQuickView::indexOfChild(const QAccessibleInterface *iface) const
+{
+    if (iface) {
+        QQuickItem *declarativeRoot = m_view->rootObject();
+        if (declarativeRoot == iface->object())
+            return 1;
+    }
+    return -1;
+
+}
+
+QT_END_NAMESPACE
+
+#endif // QT_NO_ACCESSIBILITY