From 116d3de3fa3907d66c146df94b331ffaec50eedf Mon Sep 17 00:00:00 2001
From: Sonja Happ <sonja.happ@eonerc.rwth-aachen.de>
Date: Fri, 29 Jan 2021 10:05:51 +0100
Subject: [PATCH] backwards compatibility of plot legend

---
 src/widget/widget-plot/plot-legend.js | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/widget/widget-plot/plot-legend.js b/src/widget/widget-plot/plot-legend.js
index 1ada30d..4dd7459 100644
--- a/src/widget/widget-plot/plot-legend.js
+++ b/src/widget/widget-plot/plot-legend.js
@@ -20,7 +20,7 @@ import { scaleOrdinal} from 'd3-scale';
 import {schemeCategory10} from 'd3-scale-chromatic'
 
 function Legend(props){
- 
+
   const signal = props.sig;
   const hasScalingFactor = (signal.scalingFactor !== 1);
 
@@ -52,10 +52,15 @@ class PlotLegend extends React.Component {
 
     return <div className="plot-legend">
       <ul>
-        {
+        { this.props.lineColors !== undefined && this.props.lineColors != null ? (
           this.props.signals.map( signal =>
              <Legend key={signal.id} sig={signal} lineColor={this.props.lineColors[signal.id]}/>
-        )}
+        )) : (
+          this.props.signals.map( signal =>
+            <Legend key={signal.id} sig={signal} lineColor={"undefined"}/>
+          ))
+        }
+
       </ul>
     </div>;
   }