Various improvements

js/input/mouse/MouseTracking.js

@@ -1,3 +1,4 @@
+import Configuration from "../../Configuration"
 import Pointing from "./Pointing"
 
 export default class MouseTracking extends Pointing {
@@ -6,18 +7,43 @@ export default class MouseTracking extends Pointing {
         options.wantsFocusCallback = true
         super(target, blueprint, options)
 
+        this.trackingStolen = null
         let self = this
         this.mousemoveHandler = e => {
             self.blueprint.entity.mousePosition = self.locationFromEvent(e)
             return true
         }
+        this.trackingMouseStolenHandler = e => {
+            this.trackingStolen = e.target
+            self.unlistenMouseMove()
+            return true
+        }
+        this.trackingMouseGaveBackHandler = e => {
+            if (!this.trackingStolen == e.target) {
+                return false
+            }
+            self.listenMouseMove()
+            return true
+        }
     }
 
-    blueprintFocused() {
+    listenMouseMove() {
         this.target.addEventListener("mousemove", this.mousemoveHandler)
     }
 
-    blueprintUnfocused() {
+    unlistenMouseMove() {
         this.target.removeEventListener("mousemove", this.mousemoveHandler)
     }
+
+    listenEvents() {
+        this.listenMouseMove()
+        this.blueprint.addEventListener(Configuration.trackingMouseEventName.begin, this.trackingMouseStolenHandler)
+        this.blueprint.addEventListener(Configuration.trackingMouseEventName.end, this.trackingMouseGaveBackHandler)
+    }
+
+    unlistenEvents() {
+        this.unlistenMouseMove()
+        this.blueprint.removeEventListener(Configuration.trackingMouseEventName.begin, this.trackingMouseStolenHandler)
+        this.blueprint.removeEventListener(Configuration.trackingMouseEventName.end, this.trackingMouseGaveBackHandler)
+    }
 }