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42 #include "qquickaccessibleattached_p.h"
44 #ifndef QT_NO_ACCESSIBILITY
46 #include "private/qquickitem_p.h"
52 \instantiates QQuickAccessibleAttached
53 \brief Enables accessibility of QML items
55 \inqmlmodule QtQuick 2
56 \ingroup qtquick-visual-utility
57 \ingroup accessibility
59 This class is part of \l {Accessibility for Qt Quick Applications}.
61 Items the user interacts with or that give information to the user
62 need to expose their information in a semantic way.
63 Then assistive tools can make use of that information to enable
64 users to interact with the application in various ways.
66 This enables Qt Quick applications to be used with screen-readers for example.
68 The most important properties to set are \l name and \l role.
74 \qmlproperty string QtQuick2::Accessible::name
76 This property sets an accessible name.
77 For a button for example, this should have a binding to its text.
78 In general this property should be set to a simple and concise
79 but human readable name. Do not include the type of control
80 you want to represent but just the name.
84 \qmlproperty string QtQuick2::Accessible::description
86 This property sets an accessible description.
87 Similar to the name it describes the item. The description
88 can be a little more verbose and tell what the item does,
89 for example the functionallity of the button it describes.
93 \qmlproperty enumeration QtQuick2::Accessible::role
95 This flags sets the semantic type of the widget.
96 A button for example would have "Button" as type.
97 The value must be one of \l QAccessible::Role .
108 Accessible.name: label.text
109 Accessible.role: Accessible.Button
111 function accessiblePressAction() {
117 Some roles have special semantics.
118 In order to implement check boxes for example a "checked" property is expected.
123 \li \b {Expected property}
128 \li function accessiblePressAction
129 \li Called when the button receives a press action. The implementation should visually simulate a button click and perform the button action.
131 \li CheckBox, Radiobutton
133 \li The check state of the check box. Updated on Press, Check and Uncheck actions.
135 \li Slider, SpinBox, Dial, ScrollBar
136 \li value, minimumValue, maximumValue, stepSize
137 \li value will be updated on increase and decrase actions, in accordance with the other properties
142 QQuickAccessibleAttached::QQuickAccessibleAttached(QObject *parent)
143 : QObject(parent), m_role(QAccessible::NoRole)
146 QQuickItem *item = qobject_cast<QQuickItem*>(parent);
150 // Enable accessibility for items with accessible content. This also
151 // enables accessibility for the ancestors of souch items.
152 item->d_func()->setAccessibleFlagAndListener();
153 QAccessibleEvent ev(item, QAccessible::ObjectCreated);
154 QAccessible::updateAccessibility(&ev);
157 QQuickAccessibleAttached::~QQuickAccessibleAttached()
161 QQuickAccessibleAttached *QQuickAccessibleAttached::qmlAttachedProperties(QObject *obj)
163 return new QQuickAccessibleAttached(obj);