A MouseProxy element would allow the forwarding of events between mouse areas and other items which can use mouse events. An example might be a MouseArea overlay over a webview, with the events being passed on to the Webview completely if they do not fall within a specific circle of the MouseArea (to get a circular button on top of a webpage).

MouseProxy like support should probably be added to MouseRegion, like in the attached patch. However this is a complex piece of functionality and the behavior changes involved suggest that it should not go in until at least 4.8.0.