From 183d2af094288f8af91a178436642fb749de91a8 Mon Sep 17 00:00:00 2001
From: Dan Howe <d.howe@wrl.unsw.edu.au>
Date: Tue, 17 Sep 2019 08:14:24 +1000
Subject: [PATCH] Show empty graphs on startup

---
 daqviewer/daqviewer.py | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/daqviewer/daqviewer.py b/daqviewer/daqviewer.py
index 5e4a529..d59cc1a 100644
--- a/daqviewer/daqviewer.py
+++ b/daqviewer/daqviewer.py
@@ -126,7 +126,15 @@ def csv_to_json(contents, name):
               [Input('json-storage', 'children')])
 def read_json_data(json_data):
     if json_data is None:
-        return html.Div([])
+        elements = html.Div([
+            dcc.Graph(),
+            html.Div([
+                html.Div([dcc.Graph()], className='six columns'),
+            ]),
+            html.Div()
+        ])
+
+        return elements
 
     info = json.loads(json_data)['info']
     df = pd.read_json(json.loads(json_data)['timeseries'], orient='table')