Is there any way to refresh/update a Context Property

muzo

I have a QVariantMap instance and im passing it as a Context Property by
@
QVariantMap theMap;

//code block 1

viewer.rootContext()->setContextProperty("theMap", theMap);

//code block 2
@

if i populate theMap at code block 1 i can see changes in QML side but if i do it in code block 2 the changes will no be occur in QML.

My question is how can i update theMap after passing it as a ContextProperty.
Feel free to suggest different approaches :)

sierdzio

The property is copied when you assign it.

You should use a QObject instead, and define your data as Q_PROPERTY with NOTIFY signals, so that QML engine can know it has changed.

muzo

thx for answer. i solved this problem by setting the context property each time i update it.

i mean
@
//helper class..
void onMapUpdated()
{
this->_viewer->rootContext()->setContextProperty("theMap", theMap);
}
@

i passed the ApplciaitonViewer object as a paramter to the helper class constructor.

it is working now. but im worried about its drawbacks. what can they be? do u have an opinion?