Hi,
Another alternative is to use property aliasing:
import QtQuick 1.0
Rectangle {
property alias bar: content.children
Row {
id: content
anchors.fill: parent
}
}
Any item assigned to "bar" will be added as a child of (and thus positioned by)
the Row.
Cheers,
Aaron
On 18/11/2010, at 2:05 AM, ext Tomas Junnonen wrote:
> On 11/17/2010 04:40 PM, Kellomaki Pertti (Nokia-MS/Tampere) wrote:
>> On 11/17/2010 03:59 PM, Junnonen Tomas (Nokia-MS/Helsinki) wrote:
>>> The parametrized bar item doesn't have to be a direct child of Foo
>>> either. Another way is to use the onBarChanged signal to Do What You
>>> Want(tm), for example if you need to anchor the item.
>>>
>> Thanks, that clarified things. How do I access bar's anchors within the
>> signal handler though? I tried various permutations but did not quite
>> figure it out yet.
>
> "bar.anchors.top = top" for instance should just work.
>
>> Could you modify the example so that Foo has a single Text element
>> saying "This is bar", positioned just below whatever bar happens to be?
>
> Simple but naive way:
>
> Foo.qml:
> import QtQuick 1.0
>
> Rectangle {
> property Item bar
>
> Text {
> id: label
> text: "This is bar"
> }
>
> onBarChanged: {
> children = [bar, label]
> label.anchors.top = bar.bottom
> }
> }
>
> Because QML doesn't support in-place list manipulations, this isn't a
> very good solution as it restricts you from directly adding items to Foo
> by essentially hardcoding Foo's children.
>
> A better way might be to use a placeholder item, a bit like in the
> original SpinBox implementation you mentioned:
>
> Foo.qml:
> import QtQuick 1.0
>
> Rectangle {
> property Item bar
>
> Item {
> id: barPlaceHolder
> height: children[0] ? children[0].height : 0
> width: children[0] ? children[0].width : 0
> }
>
> Text {
> id: label
> text: "This is bar"
> anchors.top: barPlaceHolder.bottom
> }
>
> onBarChanged: {
> bar.parent = barPlaceHolder
> }
> }
>
> Regards,
> Tomas
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