From f364994a462635f7e487622265062a5c187da523 Mon Sep 17 00:00:00 2001
From: Paul Kaplan <pkaplan@media.mit.edu>
Date: Thu, 7 Mar 2019 11:17:48 -0500
Subject: [PATCH] Fix trying to get color info before pickX/Y was set

---
 src/containers/stage.jsx | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/containers/stage.jsx b/src/containers/stage.jsx
index d5e4b3998..e0e3096a1 100644
--- a/src/containers/stage.jsx
+++ b/src/containers/stage.jsx
@@ -112,7 +112,9 @@ class Stage extends React.Component {
     }
     startColorPickingLoop () {
         this.intervalId = setInterval(() => {
-            this.setState({colorInfo: this.getColorInfo(this.pickX, this.pickY)});
+            if (typeof this.pickX === 'number') {
+                this.setState({colorInfo: this.getColorInfo(this.pickX, this.pickY)});
+            }
         }, 30);
     }
     stopColorPickingLoop () {