Re: [Qt-qml] Change property of dynamically created component
Hi,
This explains the case, now we fully understood what was wrong in our approach.
Thanks a lot for Michael and Warwick's help.
BR,
Shiping
-Original Message-
From: Brasser Michael (Nokia-MS-Qt/Brisbane)
Sent: 11 November, 2010 03:43
To: Ji Shiping (Nokia-MS/Espoo)
Cc: qt-qml@trolltech.com
Subject: Re: [Qt-qml] Change property of dynamically created component
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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[Qt-qml] Change property of dynamically created component
Hi, We have a QML with two states and one loader component. In state2, a new component yellowRectComponent is created by the loader. In state3, we'd like to modify this newly created component's properties, but it doesn't seem to work (the new component creation is successful though). Do you know whether this is supported scenario or there is alternative way of achieving this? Thanks. BR, Shiping ___ Qt-qml mailing list Qt-qml@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-qml
Re: [Qt-qml] Change property of dynamically created component
There's nothing wrong with this in concept. Could you provide a small self-contained example of what you've tried? Martin. -Original Message- From: qt-qml-boun...@trolltech.com [mailto:qt-qml-boun...@trolltech.com] On Behalf Of Ji Shiping (Nokia-MS/Espoo) Sent: Tuesday, 9 November 2010 4:15 AM To: qt-qml@trolltech.com Subject: [Qt-qml] Change property of dynamically created component Hi, We have a QML with two states and one loader component. In state2, a new component yellowRectComponent is created by the loader. In state3, we'd like to modify this newly created component's properties, but it doesn't seem to work (the new component creation is successful though). Do you know whether this is supported scenario or there is alternative way of achieving this? Thanks. BR, Shiping ___ Qt-qml mailing list Qt-qml@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-qml ___ Qt-qml mailing list Qt-qml@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-qml
Re: [Qt-qml] Change property of dynamically created component
Hi, Forgot the attachment, here it comes :) BR, Shiping -Original Message- From: Jones Martin (Nokia-MS-Qt/Brisbane) Sent: 09 November, 2010 01:05 To: Ji Shiping (Nokia-MS/Espoo); qt-qml@trolltech.com Subject: RE: Change property of dynamically created component There's nothing wrong with this in concept. Could you provide a small self-contained example of what you've tried? Martin. -Original Message- From: qt-qml-boun...@trolltech.com [mailto:qt-qml-boun...@trolltech.com] On Behalf Of Ji Shiping (Nokia-MS/Espoo) Sent: Tuesday, 9 November 2010 4:15 AM To: qt-qml@trolltech.com Subject: [Qt-qml] Change property of dynamically created component Hi, We have a QML with two states and one loader component. In state2, a new component yellowRectComponent is created by the loader. In state3, we'd like to modify this newly created component's properties, but it doesn't seem to work (the new component creation is successful though). Do you know whether this is supported scenario or there is alternative way of achieving this? Thanks. BR, Shiping ___ Qt-qml mailing list Qt-qml@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-qml TestPropertyChanges.qml Description: TestPropertyChanges.qml ___ Qt-qml mailing list Qt-qml@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-qml
