Adds an event handler for the ZoomFactorChanged event. ZoomFactorChanged runs when the ZoomFactor property of the WebView changes. The event may run because the ZoomFactor property was modified, or due to the user manually modifying the zoom. When it is modified using the ZoomFactor property, the internal zoom factor is updated immediately and no ZoomFactorChanged event is triggered. WebView associates the last used zoom factor for each site. It is possible for the zoom factor to change when navigating to a different page. When the zoom factor changes due to a navigation change, the ZoomFactorChanged event runs right after the ContentLoading event.

\snippet ViewComponent.cpp ZoomFactorChanged