[SailfishDevel] best way to set QML properties from within C++ in Sailfish?

[Wim de Vries]

On 12/12/2013 02:28 PM, Wim de Vries wrote:
> Thanks.
>
> On 12/12/2013 01:44 PM, Robin Burchell wrote:
>> On 12 Dec 2013, at 13:42, Wim de Vries <wsvries at xs4all.nl 
>> <mailto:wsvries at xs4all.nl>> wrote:
>>> I need to set many properties in QML elements from within C++.
>>
>> You may find it easier to expose these properties *from* C++ to QML, 
>> using a singleton type (for example)
>>
>> http://qt-project.org/doc/qt-5.0/qtqml/qtqml-cppintegration-definetypes.html#registering-singleton-objects-with-a-singleton-type
>>
> Yes, I have to control many property values.
>>> QT documentation:
>>> QQmlEngine  <http://qt-project.org/doc/qt-5.0/qtqml/qqmlengine.html>  engine;
>>> QQmlComponent  <http://qt-project.org/doc/qt-5.0/qtqml/qqmlcomponent.html>  component(&engine,  "MyItem.qml");
>>> QObject  <http://qt-project.org/doc/qt-5.0/qtcore/qobject.html>  *object=  component.create();
>>> qDebug  <http://qt-project.org/doc/qt-5.0/qtcore/qtglobal.html#qDebug>()<<  "Property value:"  <<  QQmlProperty  <http://qt-project.org/doc/qt-5.0/qtqml/qqmlproperty.html>::read(object,  "someNumber").toInt();
>>> QQmlProperty  <http://qt-project.org/doc/qt-5.0/qtqml/qqmlproperty.html>::write(object,  "someNumber",  5000)
>>>
>>> Still in Sailfish we only have a QQuickView*, no 
>>> QQmlEngine/QQmlComponent.
>>> How do I get their from QQuickView?
>>
>> http://qt-project.org/doc/qt-5.1/qtquick/qquickview.html#engine
> I'll try this one indeed.
That doesn't work. I need the object (whatever type of object that may 
be) returned by component.create.

>>
>>> Also,
>>> Can I get to all Pages (even if not active) and their nested childs 
>>> via the above mentioned QObject*  ?
>>
>> Not easily, AFAIK.
>>
>>
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