Fail to get active focus on ListView enclosed in FocusScope after changing it's visibility

[krnekit]

When I set visibility of ListView enclosed in FocusScope to false and then return it to true, it fails to get active focus (changing it's focus property does no effect). If I use Item instead of FocusScope or change opacity instead of visibility - all works fine.
Is this a Qt bug or I misunderstood something? Qt 4.8.1, Windows 7.

TestFocus.qml:
@import QtQuick 1.1

Rectangle {
width: 360
height: 400

ListModel {
    id: lm
    ListElement { data: "1" }
    ListElement { data: "2" }
}

FocusScope {
    focus: true
    width: parent.width
    height: parent.height - buttonBox.height
    ListView {
        id: view
        visible: false
        anchors.fill: parent
        spacing: 5
        model: lm
        highlight: Rectangle { color: "red" }
        delegate: Rectangle {
            width: view.width
            height: 50
            radius: 10
            border {
                color: "gray"
                width: 3
            }
            Text {
                anchors.centerIn: parent
                text: model.data
            }
        }
        onActiveFocusChanged: { console.log("activeFocusChanged", activeFocus) }
        onFocusChanged: { console.log("focusChanged", focus) }
    }

    Rectangle {
        id: dummy
        visible: false
        anchors.fill: parent
        color: "black"
    }
}

Rectangle {
    id: buttonBox
    width: parent.width
    height: 50
    anchors.bottom: parent.bottom

    Button {
        height: parent.height
        width: parent.width / 2
        buttonLabel: "ListView"
        anchors.left: parent.left
        onButtonClick: {
            dummy.focus = false
            dummy.visible = false
            view.visible = true
            view.focus = true
        }
    }

    Button {
        height: parent.height
        width: parent.width / 2
        buttonLabel: "Dummy"
        anchors.right: parent.right
        onButtonClick: {
            view.focus = false
            view.visible = false
            dummy.visible = true
            dummy.focus = true
        }
    }
}

}@

Button.qml:
@import QtQuick 1.1

Rectangle {
property alias buttonLabel: label.text
signal buttonClick()
id: button
width: 50
height: 25
border {
width: 2
color: "gray"
}
Text {
id: label
anchors.centerIn: parent
verticalAlignment: Text.AlignVCenter
horizontalAlignment: Text.AlignHCenter
}
MouseArea {
id: mouseArea
anchors.fill: parent
onClicked: buttonClick()
}
}@

[ludde]

I think you have to use forceActiveFocus() instead of just setting focus to true.

[krnekit]

Yes, forceActiveFocus() works and I'm using it now. But I'm also wondering, if it is correct behavior to fail to get active focus after item become invisible.

[quote author="ludde" date="1346177044"]I think you have to use forceActiveFocus() instead of just setting focus to true.[/quote]

[wimvalcke]

There are still some serious bugs in this Focus stuff from QML
Even the QML example about focus (declarative/keyinteraction/focus/) does not work.
I modified the program from above a little bit to show the issues

@import QtQuick 1.1

Rectangle {
width: 360
height: 400

ListModel {
    id: lm
    ListElement { data: "1" }
    ListElement { data: "2" }
}

FocusScope {
    id :focusScope
    focus: true
    width: parent.width
    height: parent.height - buttonBox.height
    onActiveFocusChanged: { console.log("FocusScope activeFocusChanged", focusScope.activeFocus) }
    onFocusChanged: { console.log("FocusScope focusChanged", focusScope.focus) }

    ListView {
        id: view
        visible: false
        anchors.fill: parent
        spacing: 5
        model: lm
        highlight: Rectangle { color: "red" }
        delegate: Rectangle {
            width: view.width
            height: 50
            radius: 10
            border {
                color: "gray"
                width: 3
            }
            Text {
                anchors.centerIn: parent
                text: model.data
            }
        }
        onActiveFocusChanged: { console.log("Listview activeFocusChanged", view.activeFocus) }
        onFocusChanged: { console.log("Listview focusChanged", view.focus) }
    }

    Rectangle {
        id: dummy
        visible: false
        anchors.fill: parent
        color: "black"
        onActiveFocusChanged: { console.log("Dummy activeFocusChanged", dummy.activeFocus) }
        onFocusChanged: { console.log("Dummy focusChanged", dummy.focus) }

    }
}

Rectangle {
    id: buttonBox
    width: parent.width
    height: 50
    anchors.bottom: parent.bottom

    Button {
        height: parent.height
        width: parent.width / 2
        buttonLabel: "ListView"
        anchors.left: parent.left
        onButtonClick: {
            //dummy.focus = false
            dummy.visible = false
            view.visible = true
            //view.focus = true
            view.forceActiveFocus()
        }
    }

    Button {
        height: parent.height
        width: parent.width / 2
        buttonLabel: "Dummy"
        anchors.right: parent.right
        onButtonClick: {
            //view.focus = false
            view.visible = false
            dummy.visible = true
            //dummy.focus = true
            dummy.forceActiveFocus()
        }
    }
}

}@

At the start of the program it outputs:

• FocusScope focusChanged true // ok logic

Now we click on the Listview button

• Listview activeFocusChanged false
• FocusScope focusChanged false

Now we click on the Dummy button

• Listview activeFocusChanged false
• FocusScope activeFocusChanged false
• Listview focusChanged false
• Dummy focusChanged true
• FocusScope activeFocusChanged false
• Dummy activeFocusChanged true
• Dummy focusChanged true

Why does the FocusScope changes the activeFocus property to false ???? According to the documentation it should be true.
What i'm seeing here is also the problem why the QML keyinteraction example does not work as expected. (Using Qt 4.8.2)
Doc says (about forceActiveFocus) : Forces active focus on the item.

This method sets focus on the item and makes sure that all the focus scopes higher in the object hierarchy are also given the focus.

But it doesn't seem to be true. Bug ??

Wim.