Selection box cause an error

[rougsig]

Steps to reproduce:

1. Go to demo
2. Try to select with box (shift + mouse click)
3. See error in the console:
   Firefox: Uncaught ReferenceError: TouchEvent is not defined
   Chrome: Uncaught TypeError: Cannot read properties of undefined (reading 'x')

Expected result:
Selection box is visible and select nodes.

[rougsig]

Bug is here.

[vadimshvetsov]

It comes from #828 . I'm ready to PR something like this:

getBoxDimensions(event: AbstractDisplacementStateEvent): ClientRect {
		let rel: Point;
	        if (event.event.touches) {
		  const touch = event.event.touches[0];
		  rel = this.engine.getRelativePoint(touch.clientX, touch.clientY);
		} else {
                  rel = this.engine.getRelativePoint(event.event.clientX, event.event.clientY)
                }
                ...
	}

So I'm suggesting to use second path by default instead of assuming that it is MouseEvent. Do you have better idea for fast fix @renato-bohler ?

It looks like React.MouseEvent is a TS type. I'm not sure that it can be used with instanceof. We can use event.event.nativeEvent and instanceof native event as second option.

[renato-bohler]

It comes from #828 . I'm ready to PR something like this:

getBoxDimensions(event: AbstractDisplacementStateEvent): ClientRect {
		let rel: Point;
	        if (event.event.touches) {
		  const touch = event.event.touches[0];
		  rel = this.engine.getRelativePoint(touch.clientX, touch.clientY);
		} else {
                  rel = this.engine.getRelativePoint(event.event.clientX, event.event.clientY)
                }
                ...
	}

So I'm suggesting to use second path by default instead of assuming that it is MouseEvent. Do you have better idea for fast fix @renato-bohler ?

It looks like React.MouseEvent is a TS type. I'm not sure that it can be used with instanceof. We can use event.event.nativeEvent and instanceof native event as second option.

Hmm, it's weird that this same code works on my project... but well, it seems to me that your change will address that issue.