[Qt-qml] Passing QVariant from QML to CPP

[James Ausmus]

Hi All-

I'm trying to make Q_INVOKABLE methods on my custom Qt class that allow 
get/set of random custom properties by name (stored in the class as a 
QMap<QString, QVariant>). However, when I try and call the getter from a QML 
context, the QVariant default value arg always comes up as "invalid" (from a 
QtCreator debugger viewpoint) - I would have thought that automatic conversion 
*to* a QVariant in a QML->CPP transition would be available - am I just doing 
it wrong?

Here's some (condensed) sample code:

MyObj::getCustomProp(const QString &propName, const QVariant &defaultValue = 
QVariant())
{
  if (!mCustomProps.contains(propName))
    setCustomProp(propName, defaultValue);
  return mCustomProps.value(propName);
}

and the QML that invokes it:

myObj.getCustomProp("MyPropName", true);


This also doesn't work with any well-known type - ie I can't pass a number, a 
string, anything, and have it show up as a valid QVariant in getCustomProp.


Any thoughts?

Thanks!

-James