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42 #include "qquickaccessibleattached_p.h"
44 #ifndef QT_NO_ACCESSIBILITY
46 #include "private/qquickitem_p.h"
51 \qmlclass Accessible QQuickAccessibleAttached
52 \brief Enables 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 .
107 Accessible.name: label.text
108 Accessible.role: Accessible.Button
110 function accessiblePressAction() {
116 Some roles have special semantics.
117 In order to implement check boxes for example a "checked" property is expected.
122 \li \b {Expected property}
127 \li function accessiblePressAction
128 \li Called when the button receives a press action. The implementation should visually simulate a button click and perform the button action.
130 \li CheckBox, Radiobutton
132 \li The check state of the check box. Updated on Press, Check and Uncheck actions.
134 \li Slider, SpinBox, Dial, ScrollBar
135 \li value, minimumValue, maximumValue, stepSize
136 \li value will be updated on increase and decrase actions, in accordance with the other properties
141 QQuickAccessibleAttached::QQuickAccessibleAttached(QObject *parent)
142 : QObject(parent), m_role(QAccessible::NoRole)
145 QQuickItem *item = qobject_cast<QQuickItem*>(parent);
149 // Enable accessibility for items with accessible content. This also
150 // enables accessibility for the ancestors of souch items.
151 item->d_func()->setAccessibleFlagAndListener();
152 #ifndef QT_NO_ACCESSIBILITY
153 QAccessibleEvent ev(item, QAccessible::ObjectCreated);
154 QAccessible::updateAccessibility(&ev);
158 QQuickAccessibleAttached::~QQuickAccessibleAttached()
162 QQuickAccessibleAttached *QQuickAccessibleAttached::qmlAttachedProperties(QObject *obj)
164 return new QQuickAccessibleAttached(obj);