Make sure to set the initial interval for the QTimer.

dopplershift · dopplershift · commit 02a757369694 · 2012-07-20T09:58:40.000-05:00
diff --git a/lib/matplotlib/backends/backend_qt4.py b/lib/matplotlib/backends/backend_qt4.py
@@ -99,6 +99,7 @@ def __init__(self, *args, **kwargs):
         self._timer = QtCore.QTimer()
         QtCore.QObject.connect(self._timer, QtCore.SIGNAL('timeout()'),
             self._on_timer)
+        self._timer_set_interval()
 
     def __del__(self):
         # Probably not necessary in practice, but is good behavior to disconnect
