diff --git a/core/src/processing/opengl/PGL.java b/core/src/processing/opengl/PGL.java
index e4361e825..11909c8cf 100644
--- a/core/src/processing/opengl/PGL.java
+++ b/core/src/processing/opengl/PGL.java
@@ -60,6 +60,8 @@ import processing.event.MouseEvent;
 
 import com.jogamp.newt.awt.NewtCanvasAWT;
 import com.jogamp.newt.event.InputEvent;
+import com.jogamp.newt.event.WindowEvent;
+import com.jogamp.newt.event.WindowUpdateEvent;
 import com.jogamp.newt.opengl.GLWindow;
 import com.jogamp.opengl.FBObject;
 import com.jogamp.opengl.util.AnimatorBase;
@@ -655,6 +657,9 @@ public class PGL {
       com.jogamp.newt.event.KeyListener keyListener = new NEWTKeyAdapter();
       window.addKeyListener(keyListener);
 
+      com.jogamp.newt.event.WindowListener winListener = new NEWTWindowListener();
+      window.addWindowListener(winListener);
+
       capabilities = window.getChosenGLCapabilities();
       canvas = canvasNEWT;
       canvasAWT = null;
@@ -3296,6 +3301,33 @@ public class PGL {
     pg.parent.postEvent(ke);
   }
 
+  class NEWTWindowListener implements com.jogamp.newt.event.WindowListener {
+    @Override
+    public void windowGainedFocus(WindowEvent arg0) {
+      pg.parent.focusGained(null);
+    }
+
+    @Override
+    public void windowLostFocus(WindowEvent arg0) {
+      pg.parent.focusLost(null);
+    }
+
+    @Override
+    public void windowDestroyNotify(WindowEvent arg0) { }
+
+    @Override
+    public void windowDestroyed(WindowEvent arg0) { }
+
+    @Override
+    public void windowMoved(WindowEvent arg0) { }
+
+    @Override
+    public void windowRepaint(WindowUpdateEvent arg0) { }
+
+    @Override
+    public void windowResized(WindowEvent arg0) { }
+  }
+
   // NEWT mouse listener
   class NEWTMouseAdapter extends com.jogamp.newt.event.MouseAdapter {
     @Override