Hi,
Have you tried using the QML Binding Type?
http://doc.qt.io/qt-5/qml-qtqml-binding.html
On Thu, Mar 24, 2016 at 11:11 PM, Jérôme Godbout <jer...@bodycad.com> wrote:
> Hi,
>
> I was wondering if I am the only one who found the initial property of a
> source based Loader Item a bit annoying. inline sourceComponent with
> Component {} declaration are well ok on the other hand. I'm explaining
> myself, when using a loader you have 2 choice to set the initial binding on
> created item:
>
> 1- On item changed set the binding
>
> *Loader*
> *{*
> * source: externalObj.getSrc() // return something like "myItem.qml"*
> * onItemChanged:*
> * {*
> * if(!item) return;*
> * item.myprop = Qt.binding(function(){ return myExternalProperty; })*
> * }*
> *}*
>
> 2- use the setSource() function instead of the source directly
>
> *Loader*
> *{*
> * property url myDummySrc: externalObj.getSrc()*
> * onMyDummySrcChanged:*
> * {*
> * setSource(myDummySrc, { 'myprop': Qt.binding(function(){ return
> myExternalProperty; }) });*
> * }*
> *}*
>
> This is rather annoying and ugly. Number 1 is also having the problem
> where *myItem.qml* must be able to handle *myprop *to have a default
> value or being empty without output a lots of console error. Number 2 work
> well and is the solution I find myself writing often. I was wondering if a
> Loader that support a dictionary of initial property when source changed
> would be nice:
>
> *Loader*
> *{*
> * source: externalObj.getSrc()*
> * initialProperties: { 'myprop': Qt.binding(function(){ return
> myExternalProperty; }) }*
> *}*
>
> What do you think?
> Jerome
>
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>
--
Shantanu Tushar (UTC +0530)
shantanu.io
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