Implementing Drag Zooming Tool in TS / Angular 2+

@av8orbynight wrote:

I'm at a bit of a loss on how I should be using DragZoomingTool.js from https://gojs.net/latest/extensions/DragZooming.html in my typescript based code (Angular 2+ CLI).

This is the message I'm getting if I simply copy/paste the code globally in my component:

shot1.png1238x998 125 KB

If I try to create a DragZoomingTool class, I run in to various errors.

If I try to extend go.Tool:

class DragZoomingTool extends go.Tool {
foo(){}
}

I get "Argument of type 'typeof Tool' is not assignable to parameter of type 'Constructor'" at:

go.Diagram.inherit(DragZoomingTool, go.Tool);

Would you be able to steer me into the right way of using DragZoomingTool in Angular 2+?

Thanks for your help.

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