[Qt-qml] Reparent in object initialization

[Adriano Rezende]

On Tue, Jun 14, 2011 at 4:07 PM, Artem Marchenko
<artem.marchenko at gmail.com>wrote:

> Hi
>
> I didn't try this code, but in general it should work.
>

Yes, it works. But I want a guarantee that it won't change in the future due
to an internal change in the QML code.

What I did try is to defined some parts of a scene in the descendant object
> (like you would do in a Strategy pattern for coding) and reparenting works
> very well there, even anchors are accounted correctly. For example, in my
> cross-platform app I need to draw status line on Symbian only:
>
> BaseUi.qml
> Rectangle {
>
>  // to be filled for platforms that need it
>  property alias statusLine: mainPane.statusLine
>
>  // needs to be exposed so that I could parent to it
>  property alias mainPane: mainPane
>
>  Rectangle {
>    id: mainPane
>    property variant statusLine: null
>  }
> }
>
> SymbianUi.qml
>
> BaseUi {
>  statusLine: Rectangle {
>    parent: mainPane
>     anchors.left: parent.left  // yep, this also works
>  }
> }
>
>
In your case I think it's better to use children property, so you don't need
to expose the parent. It could be like below:

BaseUi.qml
===
Rectangle {
    property alias statusLine: mainPane.children

    Rectangle {
       id: mainPane
       anchors.fill: parent
       anchors.margins: 10
    }
}


SymbianUi.qml
===
BaseUi {
     statusLine: Rectangle {
         anchors.fill: parent
     }
}

Br,
Adriano
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