From d73d6fc643306e149c3eede8706e6d107c978397 Mon Sep 17 00:00:00 2001
From: Jesse <jesse.greenberg@colorado.edu>
Date: Mon, 20 Sep 2021 13:00:25 -0400
Subject: [PATCH] interrupt KeyboardDragListener on blur, see
 https://github.com/phetsims/scenery/issues/1285

---
 js/listeners/KeyboardDragListener.js | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/js/listeners/KeyboardDragListener.js b/js/listeners/KeyboardDragListener.js
index 701609bb7..85af03c95 100644
--- a/js/listeners/KeyboardDragListener.js
+++ b/js/listeners/KeyboardDragListener.js
@@ -369,6 +369,16 @@ class KeyboardDragListener {
     this.resetPressAndHold();
   }
 
+  /**
+   * Interrupts and resets the listener on blur so that listener state is reset and keys are removed from the keyState
+   * array. Public because this is called with the scenery listener API.
+   * @public
+   *
+   * @param {SceneryEvent} event
+   */
+  blur( event ) {
+    this.interrupt();
+  }
 
   /**
    * Step function for the drag handler. JavaScript does not natively handle multiple keydown events at once,