[Solved] Passing a custom QDeclarativeItem as a method Parameter?

Gary_

I have a class MyItem that derrives from QDeclarativeItem.
I have a 2nd class MyContainer that derrives from QDeclarativeItem.

@
MyItem {
id: item1
text: "Hello!"
}

MyContainer {
    id: container
}

Component.onCompleted: {
      console.log( container.returnItem(item1).text );
}

@

Where

@
Q_INVOKABLE MyItem* returnItem(MyItem* item) { return item; }
@

Errors

@
TypeError: Result of expression 'container.returnItem(item1)' [undefined] is not an object.
@

Is it possible to pass a custom item into a method, or must I use a property?

Gary_

--- Solved ---

@
Q_INVOKABLE QObject* returnItem(QObject* item) { return item; }
@

And qobject_cast<MyItem*>(item) to make use in C++.

mbrasser

Hi,

This was a bug, but should be solved for Qt 4.7.1 and later (see "QTBUG-13047":http://bugreports.qt.nokia.com/browse/QTBUG-13047). Are you using 4.7.0, or still seeing problems in a later release?

Regards,
Michael

mdpoole

I noticed something very similar (I would guess the same underlying cause) yesterday with Qt 4.7.2.

In my case, I had a signal in my C++ code with signature void mySignal(CustomTypeDerivedFromQObject*). If I attached a Javascript function in QML to that signal, the function's parameter would print as QVariant<CustomTypeDerivedFromQObject*> but I could not access any properties of the object. By changing the signal's signature to void mySignal(QObject*), the QML code was able to see the object's properties as expected.