Drag and drop support off of actors

[eonarheim]

Context

The ability to drag and drop Actors would be very useful for games with mouse or touch controls.

Proposal

Implement drag and drop on Actors.

[kamranayub]

You can do this by enabling pointer events on actor and just using a flag on pointerdown. Should we close this?

var pointerDown = false;

actor.enableCapturePointer = true;
actor.capturePointer.enableMoveEvents = true;

actor.on("pointerdown", () => { pointerDown = true; });
actor.on("pointerup", () => { pointerDown = false; });
actor.on("pointermove", (pe: ex.Input.PointerEvent) => {
  if (!this.pointerDown) return;
  this.x = pe.x;
  this.y = pe.y;
});

[eonarheim]

@kamranayub Should we create an alias for the pattern you described?

Something to this effect

actor.draggable();
// or
actor.enableDragAndDrop();