From 7ad195e9407b2a59ee7762e4ac0e238242ec67cd Mon Sep 17 00:00:00 2001
From: Joshua Gould <jgould@broadinstitute.org>
Date: Thu, 12 May 2016 15:05:02 -0400
Subject: [PATCH] check for png too large

---
 src/ui/heat_map.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/ui/heat_map.js b/src/ui/heat_map.js
index 03778fa..3702924 100644
--- a/src/ui/heat_map.js
+++ b/src/ui/heat_map.js
@@ -2925,8 +2925,12 @@ morpheus.HeatMap.prototype = {
 			var context = canvas.getContext('2d');
 			this.snapshot(context);
 			canvas.toBlob(function (blob) {
-				if (blob.size === 0) {
-					throw 'Image is too large.';
+				if (blob == null || blob.size === 0) {
+					morpheus.FormBuilder.showInModal({
+						title: 'Save Image',
+						html: 'Image is too large to save.'
+					});
+					return;
 				}
 
 				saveAs(blob, file, true);
-- 
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