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>

2 files changed, 18 insertions, 3 deletions

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()
         }
     }
 }