From a1361fa4fc50dd34ce2503d153424f6c40ef7b4b Mon Sep 17 00:00:00 2001
From: Chris Malley <cmalley@pixelzoom.com>
Date: Tue, 23 Aug 2016 09:38:59 -0600
Subject: [PATCH] dispose of ArrowButton instances, #259

---
 js/NumberControl.js    | 7 ++++++-
 js/WavelengthSlider.js | 4 +++-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/js/NumberControl.js b/js/NumberControl.js
index fe1cbed9a..55346c7e3 100644
--- a/js/NumberControl.js
+++ b/js/NumberControl.js
@@ -186,10 +186,15 @@ define( function( require ) {
 
     // @private
     this.disposeNumberControl = function() {
+
       numberDisplay.dispose();
+      leftArrowButton.dispose();
+      rightArrowButton.dispose();
+      slider.dispose();
+
       numberProperty.unlink( arrowEnabledListener );
       thisNode.enabledProperty.unlink( enabledObserver );
-      slider.dispose();
+
       options.tandem && options.tandem.removeInstance( thisNode );
     };
 
diff --git a/js/WavelengthSlider.js b/js/WavelengthSlider.js
index e8ab369e9..9908ae0b4 100644
--- a/js/WavelengthSlider.js
+++ b/js/WavelengthSlider.js
@@ -222,8 +222,10 @@ define( function( require ) {
     options.tandem && options.tandem.addInstance( this, TNode );
 
     this.disposeWavelengthSlider = function() {
-      options.tandem && options.tandem.removeInstance( this );
+      plusButton && plusButton.dispose();
+      minusButton && minusButton.dispose();
       wavelength.unlink( wavelengthListener );
+      options.tandem && options.tandem.removeInstance( this );
     };
   }