Right Click & drag event on diagram?

I want to get Right Click & Drag event, Which is in gojs default left click & drag event?
How Can I done it?
I want this because we need a functionality in left click & drag event?
Can it be done?
I am using BackgroundContextClicked event .
But When simple Click & drag it is not working. It is working when mouse leave after click.

There is no Tool that is enabled to work under those circumstances, so you either need to define a new tool to do so, or you need to modify an existing tool.

What is it that you want right-mouse-drag to do? I’m asking because it might be easier to modify an existing tool than it would be to define a completely new one.