Merge pull request #227 from ZLLentz/fix-pyepics

Pyepics plugin race condition in send_access_state callback
slaclab · Jan 22, 2018 · 22fcba2 · 22fcba2
2 parents 5a480ed + 4218dbd
commit 22fcba2
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/pydm/data_plugins/epics_plugins/pyepics_plugin_component.py b/pydm/data_plugins/epics_plugins/pyepics_plugin_component.py
@@ -22,11 +22,11 @@ class Connection(PyDMConnection):
 
     def __init__(self, channel, pv, protocol=None, parent=None):
         super(Connection, self).__init__(channel, pv, protocol, parent)
+        self.app = QApplication.instance()
         self.pv = epics.PV(pv, connection_callback=self.send_connection_state, form='ctrl', auto_monitor=True, access_callback=self.send_access_state)
         self.pv.add_callback(self.send_new_value, with_ctrlvars=True)
         self.add_listener(channel)
 
-        self.app = QApplication.instance()
         self._severity = None
         self._precision = None
         self._enum_strs = None