Add parameter "--exposure-time", defaulting to 0.5 seconds

Unfortunately, events for the React panels can not be captured.

grafanimate/animations.py

@@ -2,6 +2,8 @@
 # (c) 2018 Andreas Motl <andreas@hiveeyes.org>
 # License: GNU Affero General Public License, Version 3
 import logging
+import time
+
 from munch import munchify
 from datetime import timedelta
 from dateutil.relativedelta import relativedelta
@@ -85,6 +87,10 @@ def run(self, dtstart=None, dtuntil=None, interval=None):
 
             yield item
 
+            if self.options["exposure-time"] > 0:
+                logger.info("Waiting for {} seconds (exposure time)".format(self.options["exposure-time"]))
+                time.sleep(self.options["exposure-time"])
+
         self.log("Animation finished")
 
     def get_freq_delta(self, interval):

grafanimate/commands.py

@@ -24,6 +24,7 @@ def run():
       --dashboard-uid=<uid>         Grafana dashboard uid.
 
     Optional:
+      --exposure-time=<seconds>     How long to wait for each frame to complete rendering. [default: 0.5]
       --panel-id=<id>               Render single panel only by navigating to "panelId=<id>&fullscreen".
       --dashboard-view=<mode>       Use Grafana's "d-solo" view for rendering single panels without header.
 
@@ -104,6 +105,8 @@ def run():
     if options['dashboard-view'] == 'd-solo' and not options['panel-id']:
         raise DocoptExit('Error: Parameter --panel-id is mandatory for --dashboard-view=d-solo')
 
+    options['exposure-time'] = float(options['exposure-time'])
+
     # Define and run Pipeline.
 
     # Define pipeline elements.

grafanimate/core.py

@@ -29,7 +29,7 @@ def make_animation(grafana: GrafanaWrapper, storage, options):
         grafana=grafana,
         storage=storage,
         dashboard_uid=options['dashboard-uid'],
-        options=filter_dict(options, ['panel-id', 'dashboard-view', 'header-layout', 'datetime-format'])
+        options=filter_dict(options, ['panel-id', 'dashboard-view', 'header-layout', 'datetime-format', 'exposure-time'])
     )
     if not hasattr(scenario, options.scenario):
         raise NotImplementedError('Animation scenario "{}" not implemented'.format(options.scenario))