QML: Component.onDestruction not calling on window close

[nestuser]

Hi,

I loaded a QML file using QDeclarativeview and continuously send some signals to the Qml file from cpp.
On window close of the qml file i need to stop the the signals. But how can I identify the window close of qml file?? I tried Component.onDestruction event of qml. But it is not getting. Please suggest a suitable method.
I tried closeEvent(). But this is also not hitting...

Thanks in advance.