From 7e5ba95b02e4ead3ee2b41eca1af0acb72d6f7cd Mon Sep 17 00:00:00 2001
From: bob <bcz@cs.brown.edu>
Date: Tue, 21 May 2019 14:15:06 -0400
Subject: fixes for histogram brushing.

---
 src/client/northstar/dash-nodes/HistogramBox.tsx | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src/client/northstar/dash-nodes/HistogramBox.tsx')

diff --git a/src/client/northstar/dash-nodes/HistogramBox.tsx b/src/client/northstar/dash-nodes/HistogramBox.tsx
index a9646ed31..d7732ee86 100644
--- a/src/client/northstar/dash-nodes/HistogramBox.tsx
+++ b/src/client/northstar/dash-nodes/HistogramBox.tsx
@@ -125,9 +125,11 @@ export class HistogramBox extends React.Component<FieldViewProps> {
                                 let mapped = brushingDocs.map((brush, i) => {
                                     brush.backgroundColor = StyleConstants.BRUSH_COLORS[i % StyleConstants.BRUSH_COLORS.length];
                                     let brushed = DocListCast(brush.brushingDocs);
+                                    if (!brushed.length)
+                                        return null;
                                     return { l: brush, b: brushed[0][Id] === proto[Id] ? brushed[1] : brushed[0] };
                                 });
-                                this.HistoOp.BrushLinks.splice(0, this.HistoOp.BrushLinks.length, ...mapped);
+                                runInAction(() => this.HistoOp.BrushLinks.splice(0, this.HistoOp.BrushLinks.length, ...mapped.filter(m => m) as { l: Doc, b: Doc }[]));
                             }
                         }, { fireImmediately: true });
                     reaction(() => this.createOperationParamsCache, () => this.HistoOp.Update(), { fireImmediately: true });
-- 
cgit v1.2.3-70-g09d2

