GUI_ZoomUpdated
This callback event is triggered when a zoom change has completed.
Callback Parameters
- Zoomparams: Zoom operation parameters.
These can be used directly with the zoomPageUpdate method.
Zoomparams {
    Type: 0; // Zoom in
    Type: 1; // Zoom out
    Type: 2; // Zoom window
    Type: 3; // Zoom all
    Type: 4; // Zoom width
    Type: 5; // Zoom height
}