Improve accessibility action support for Qt Quick

Add interface_cast for the action interface.
Implement actions for the following roles:
Button                           : Press
CheckBox, RadioButton            : Press, Check, Uncheck
Slider, Spinbox, Dial, ScrollBar : Increment, Decrement

Change-Id: Ic8e0d17c709ba51655f3f4b699092baf603b6f18
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@nokia.com>

4 files changed, 147 insertions, 3 deletions

diff --git a/examples/declarative/accessibility/widgets/Checkbox.qml b/examples/declarative/accessibility/widgets/Checkbox.qml
new file mode 100644
index 0000000000..17eb733197
--- /dev/null
+++ b/examples/declarative/accessibility/widgets/Checkbox.qml
@@ -0,0 +1,62 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** 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.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+import QtQuick 2.0
+
+
+Rectangle {
+    id: checkbox
+
+    Accessible.role: Accessible.CheckBox
+
+    property bool checked // required variable
+
+    width: 30
+    height: 30
+
+
+    Text {
+        id: checkboxText
+        text: parent.checked ? "on" : "off"
+        anchors.centerIn: parent
+    }
+}
diff --git a/examples/declarative/accessibility/widgets/Slider.qml b/examples/declarative/accessibility/widgets/Slider.qml
new file mode 100644
index 0000000000..32aa6a3a41
--- /dev/null
+++ b/examples/declarative/accessibility/widgets/Slider.qml
@@ -0,0 +1,67 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** 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.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+import QtQuick 2.0
+
+// Minimal slider implementation
+Rectangle {
+    id: slider
+
+    property alias text : buttonText.text
+    Accessible.role: Accessible.Slider
+
+    property int value             // required
+    property int minimumValue : 0  // optional (default INT_MIN)
+    property int maximumValue : 20 // optional (default INT_MAX)
+    property int stepSize : 1      // optional (default 1)
+
+    width: 30
+    height: 30
+
+
+    Text {
+        id: buttonText
+        text: parent.value
+        anchors.centerIn: parent
+        font.pixelSize: parent.height * .5
+    }
+}
diff --git a/examples/quick/accessibility/accessibility.qml b/examples/quick/accessibility/accessibility.qml
index 2804d2abc8..e987561bb1 100644
--- a/examples/quick/accessibility/accessibility.qml
+++ b/examples/quick/accessibility/accessibility.qml
@@ -59,12 +59,13 @@ Rectangle {
         id: column
         spacing: 6
         anchors.fill: parent
+        anchors.margins: 10
         width: parent.width
         Row {
             spacing: 6
             width: column.width
-            Button { width: 100; height: column.h + 20; text: "Send" }
-            Button { width: 100; height: column.h + 20; text: "Discard" }
+            Button { width: 100; height: column.h + 20; text: "Send"; onClicked : { status.text = "Send" } }
+            Button { width: 100; height: column.h + 20; text: "Discard";  onClicked : { status.text = "Discard" } }
         }
 
         Row {
@@ -106,5 +107,16 @@ Rectangle {
                 wrapMode: TextEdit.WordWrap
             }
         }
+        Text {
+            id : status
+            width: column.width
+        }
+
+        Row {
+            spacing: 6
+            width: column.width
+            Checkbox { checked: false }
+            Slider { value: 10 }
+        }
     }
 }
diff --git a/examples/quick/accessibility/content/Button.qml b/examples/quick/accessibility/content/Button.qml
index 2c203abe11..3d5086f741 100644
--- a/examples/quick/accessibility/content/Button.qml
+++ b/examples/quick/accessibility/content/Button.qml
@@ -49,6 +49,9 @@ Rectangle {
     Accessible.name: text
     Accessible.description: "This button does " + text
     Accessible.role: Accessible.Button
+    function accessiblePressAction() {
+        button.clicked()
+    }
 
     signal clicked
 
@@ -74,7 +77,7 @@ Rectangle {
         id: mouseArea
         anchors.fill: parent
         onClicked: {
-            checked = !checked;
+            parent.clicked()
         }
     }
 }