Hi Shiping,
id's are scoped to the component in which they are defined (and are accessible
to subcomponents, but not to containing components) -- perhaps this is the
problem you are running into? For example:
// YellowRect.qml
Rectangle {
id: yellowRect
width: 100
height: 100
color: "yellow"
}
//invalid.qml
Rectangle {
YellowRect {}
Rectangle {
color: yellowRect.color // ### this is invalid, as the id "yellowRect"
is not accessible in this context
}
}
//valid.qml
Rectangle {
YellowRect { id: myRect }
Rectangle {
color: myRect.color // ### this is valid, as the id "myRect" is
accessible in this context
}
}
Likewise, if YellowRect was dynamically created and placed into component X,
the "yellowRect" id would not be visible in the context of X.
Regards,
Michael
On 10/11/2010, at 7:39 PM, ext shiping...@nokia.com wrote:
> Hi,
>
> That solves the problem. One more related question, does it mean that
> dynamically created QML objects (incl. e.g. the one created using
> QDeclarativeComponent::create()) will not have their id registered?
>
> We've noticed the issue that once we load and attach such objects
> programmatically, future binding update to these newly created objects will
> not work as it complains the object with the given id is not found. This has
> nothing to do with the loader though. Please confirm and we will send some
> sample code if you believe it should work and there is something wrong in our
> side.
>
> Thanks again.
>
> BR,
> Shiping
>
> -----Original Message-----
> From: Allison Warwick (Nokia-MS-Qt/Brisbane)
> Sent: 10 November, 2010 02:55
> To: Ji Shiping (Nokia-MS/Espoo); Jones Martin (Nokia-MS-Qt/Brisbane);
> qt-qml@trolltech.com
> Subject: RE: Change property of dynamically created component
>
> The id of a component does not become a new global identifier. i.e.
> "yellowRect" below:
>
> Component {
> id: yellowRectComponent
> Rectangle {
> id: yellowRect
> width: 100
> height: 100
> color: "yellow"
> }
> }
>
> As you can imagine: if you had 2 loaders that loaded this, what would happen?
>
> So, to fix your example, instead of:
>
> PropertyChanges {
> target: yellowRect
> color: "gray"
> }
>
> You need:
>
> PropertyChanges {
> target: loader.item
> color: "gray"
> }
>
> --
> Warwick
>
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