From 063b3ce023b8531ef9028e3c814acc8c37c8733f Mon Sep 17 00:00:00 2001
From: pixelzoom <cmalley@pixelzoom.com>
Date: Thu, 4 Mar 2021 18:40:18 -0700
Subject: [PATCH] move rootsNode.visibleProperty from overrides.js to code,
 #148

---
 js/graphing-quadratics-phet-io-overrides.js | 3 ---
 js/standardform/view/RootsNode.js           | 2 +-
 2 files changed, 1 insertion(+), 4 deletions(-)

diff --git a/js/graphing-quadratics-phet-io-overrides.js b/js/graphing-quadratics-phet-io-overrides.js
index 1e804a9c..09989449 100644
--- a/js/graphing-quadratics-phet-io-overrides.js
+++ b/js/graphing-quadratics-phet-io-overrides.js
@@ -223,9 +223,6 @@ window.phet.preloads.phetio.phetioElementsOverrides =
     "graphingQuadratics.standardFormScreen.view.rightPointToolNode.visibleProperty": {
       "phetioFeatured": true
     },
-    "graphingQuadratics.standardFormScreen.view.rootsNode.visibleProperty": {
-      "phetioReadOnly": true
-    },
     "graphingQuadratics.standardFormScreen.view.vertexNode.visibleProperty": {
       "phetioReadOnly": true
     },
diff --git a/js/standardform/view/RootsNode.js b/js/standardform/view/RootsNode.js
index 68852997..2133d88a 100644
--- a/js/standardform/view/RootsNode.js
+++ b/js/standardform/view/RootsNode.js
@@ -34,11 +34,11 @@ class RootsNode extends Node {
                rootsVisibleProperty, coordinatesVisibleProperty, options ) {
 
     options = merge( {
+      visiblePropertyOptions: { phetioReadOnly: true }, // because visibility is derived, see below
 
       // phet-io
       tandem: Tandem.REQUIRED,
       phetioDocumentation: 'displays the roots of the interactive quadratic'
-
     }, options );
 
     // options common to both Property instances