[Interest] Exposing nested visual properties in FocusScope (alias -> alias problem)

[Mark Tucker]

Hello,

As long as your internal Text item has an id, then you can add the aliases in the FocusScope. This should work:

FocusScope {
    property alias text: text.text
    property alias textPixelSize: text.font.pixelSize

    Rectangle {
        id: button
        focus: true

        width: text.implicitWidth
        height: text.implicitHeight

        Text {
            id: text
            ...
        }
    }
}

-----Original Message-----
From: Interest [mailto:interest-bounces+mark.tucker=airborne.aero at qt-project.org] On Behalf Of Elvis Stansvik
Sent: 21 March 2016 12:38
To: interest at qt-project.org Interest <interest at qt-project.org>
Subject: [Interest] Exposing nested visual properties in FocusScope (alias -> alias problem)

Hi all,

I'm trying to create a reusable component for a button. Right now I'm trying to figure out focus handling (the app is keyboard navigation only).

I currently have the following structure (Button.qml):

    Rectangle {
        id: button

        property alias text: text.text
        property alias textPixelSize: text.font.pixelSize

        width: text.implicitWidth
        height: text.implicitHeight

        Text {
            id: text
            ...
        }
    }

Where I'm exposing the text and pixelSize properties of the text by using property aliases, to be able to use it like:

Button {
    text: "Foo bar"
    textPixelSize: 42
}

This works fine. But now I'd like the component to be able to participate in focus handling, so I wrap it in a FocusScope, e.g:

FocusScope {
    Rectangle {
        id: button
        focus: true

        property alias text: text.text
        property alias textPixelSize: text.font.pixelSize

        width: text.implicitWidth
        height: text.implicitHeight

        Text {
            id: text
            ...
        }
    }
}

Which should allow me to use it in other nested focus scopes at a higher level in the visual tree

The problem now is that I must expose the button.text and button.textPixelSize in the FocusScope, to be able to use the component as before. But I can't use property aliases again, since a property alias may not refer to another property alias.

Anyone know how I can get around this?

Thanks in advance,
Elvis
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