How can I add my own mouse wheel event?

I want to do some thing when the mouse wheel event. Currently the it can be set to zoom the diagram. But I do not find the entry for that event(Chrome, “mousewheel”). Any suggestion? Thanks a lot!

See if setting ToolManager | GoJS API can give you what you want.

If not, override ToolManager.doMouseWheel to do what you want.

Got it, It works by overriding doMouseWheel. Thanks a lot!