1 /****************************************************************************
3 ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
4 ** All rights reserved.
5 ** Contact: http://www.qt-project.org/
7 ** This file is part of the QtDeclarative module of the Qt Toolkit.
9 ** $QT_BEGIN_LICENSE:LGPL$
10 ** GNU Lesser General Public License Usage
11 ** This file may be used under the terms of the GNU Lesser General Public
12 ** License version 2.1 as published by the Free Software Foundation and
13 ** appearing in the file LICENSE.LGPL included in the packaging of this
14 ** file. Please review the following information to ensure the GNU Lesser
15 ** General Public License version 2.1 requirements will be met:
16 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
18 ** In addition, as a special exception, Nokia gives you certain additional
19 ** rights. These rights are described in the Nokia Qt LGPL Exception
20 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
22 ** GNU General Public License Usage
23 ** Alternatively, this file may be used under the terms of the GNU General
24 ** Public License version 3.0 as published by the Free Software Foundation
25 ** and appearing in the file LICENSE.GPL included in the packaging of this
26 ** file. Please review the following information to ensure the GNU General
27 ** Public License version 3.0 requirements will be met:
28 ** http://www.gnu.org/copyleft/gpl.html.
31 ** Alternatively, this file may be used in accordance with the terms and
32 ** conditions contained in a signed written agreement between you and Nokia.
40 ****************************************************************************/
42 #include "qquickaccessibleattached_p.h"
44 #ifndef QT_NO_ACCESSIBILITY
46 #include "private/qquickitem_p.h"
51 \qmlclass Accessible QQuickAccessibleAttached
52 \brief Attached property to enable accessibility of QML items.
54 \inqmlmodule QtQuick 2
55 \ingroup qml-basic-interaction-elements
56 \ingroup accessibility
58 This class is part of \l {Accessibility for Qt Quick Applications}.
60 Items the user interacts with or that give information to the user
61 need to expose their information in a semantic way.
62 Then assistive tools can make use of that information to enable
63 users to interact with the application in various ways.
65 This enables Qt Quick applications to be used with screen-readers for example.
67 The most important properties to set are \l name and \l role.
73 \qmlproperty string QtQuick2::Accessible::name
75 This property sets an accessible name.
76 For a button for example, this should have a binding to its text.
77 In general this property should be set to a simple and concise
78 but human readable name. Do not include the type of control
79 you want to represent but just the name.
83 \qmlproperty string QtQuick2::Accessible::description
85 This property sets an accessible description.
86 Similar to the name it describes the item. The description
87 can be a little more verbose and tell what the item does,
88 for example the functionallity of the button it describes.
92 \qmlproperty enumeration QtQuick2::Accessible::role
94 This flags sets the semantic type of the widget.
95 A button for example would have "Button" as type.
96 The value must be one of \l QAccessible::Role .
105 Accessible.name: label.text
106 Accessible.role: Accessible.Button
110 Some roles have special semantics.
111 In order to implement check boxes for example a "checked" property is expected.
116 \o \bold {Expected property}
122 \o The check state of the check box.
126 \o The selected state of the radio button.
130 \o Whether the button is checkable.
134 \o Whether the button is checked (only if checkable is true).
140 QQuickAccessibleAttached::QQuickAccessibleAttached(QObject *parent)
144 QQuickItem *item = qobject_cast<QQuickItem*>(parent);
148 // Enable accessibility for items with accessible content. This also
149 // enables accessibility for the ancestors of souch items.
150 item->d_func()->setAccessibleFlagAndListener();
151 QAccessible::updateAccessibility(item, 0, QAccessible::ObjectCreated);
154 QQuickAccessibleAttached::~QQuickAccessibleAttached()
158 QQuickAccessibleAttached *QQuickAccessibleAttached::qmlAttachedProperties(QObject *obj)
160 return new QQuickAccessibleAttached(obj);