Merge pull request rpgtkoolmv#184 from rpgtkoolmv/touch_lostfocus

Fix touches were not refreshed when the game window lost focus

Author: krmbn0576

js/rpg_core/TouchInput.js

@@ -256,6 +256,7 @@ TouchInput._setupEventHandlers = function() {
     document.addEventListener('touchend', this._onTouchEnd.bind(this));
     document.addEventListener('touchcancel', this._onTouchCancel.bind(this));
     document.addEventListener('pointerdown', this._onPointerDown.bind(this));
+    window.addEventListener('blur', this._onLostFocus.bind(this));
 };
 
 /**
@@ -440,6 +441,15 @@ TouchInput._onPointerDown = function(event) {
     }
 };
 
+/**
+ * @static
+ * @method _onLostFocus
+ * @private
+ */
+TouchInput._onLostFocus = function() {
+    this.clear();
+};
+
 /**
  * @static
  * @method _onTrigger