Sigma stops propagating "mousemove" events even when not dragging anything

[jacomyal]

I have an application with a sigma component and a react-sortable-hoc component next to each other.

I cannot drag elements from the react-sortable-hoc component over the sigma component, and this feels like a bug.

The reason is the following code:

sigma.js/src/core/captors/mouse.ts

Lines 239 to 244 in 9d4e33c

	if (e.preventDefault) e.preventDefault();
	else e.returnValue = false;
	e.stopPropagation();
	return false;

I can see two different solutions:

1. Only execute the code above when the stage is being dragged
2. Add settings that determine whether or not this code should execute
3. Both

The issue I have with the solution 1. alone, is that in some cases there might be other interactions (like nodes drag-and-dropping) that require this code to be executed. Any thought on that @Yomguithereal?

[jacomyal]

By the way, there is also another behaviour that could be improved: The "mousemove" event is only dispatched on sigma's mouse DOM container, so when the user grabs the graph then moves the mouse out of the graph, it stops dragging.