Our test team performs negative testing. The testers have discovered a performance issue using the MouseWheel zoom. They roll the wheel is both directions rapidly and multiple times. This causes the WheelEvent queue to load up. The user stops the wheel movement, but the Zoom in/out actions continue ...

I created a TChart.OnZoom handler.
The handler can be invoked via a Rectangle Drag action OR a MouseWheel forward/back action.
I would like to handle these two cases differently.

Is there a way to determine what action invoked the OnZoom event within the handler?