How to move an QML object from one QML file to another, dynamically?

[anda_skoa]

I am not sure I understand, but if you instantiate WindowA and WindowB in another compenent but need access to them from outside that component, then this component must provide the access, e.g. something like

X.qml

Item {
   property Item windowA: WIndowA {}
   property Item windowB: WindowB {}
}

Item {
   property Item windowA: WIndowA {}
   property Item windowB: WindowB {}
}

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main.qml

Item {
   X { id: x }
 
   anchors.right: x.windowA.right
}

Item {
   X { id: x }

   anchors.right: x.windowA.right
}

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The real question will be, however, is this is a good design. A component is a natural encapsulation unit, it shouldn't be necessary to take things out of it.

Cheers,
_