very small changes in param tree

subclasses/cameraParameterTree.py

@@ -8,16 +8,11 @@ as well as some customized parameter types
 """
 
 
-
 import pyqtgraph as pg
 from pyqtgraph.Qt import QtCore, QtGui
 import pyqtgraph.parametertree.parameterTypes as pTypes
 from pyqtgraph.parametertree import Parameter, ParameterTree, ParameterItem, registerParameterType
 
-app = QtGui.QApplication([])
-
-## test subclassing parameters
-## This parameter automatically generates two child parameters which are always reciprocals of each other
 
 
 class BasicAcquisitonParameters(pTypes.GroupParameter):
@@ -85,6 +80,8 @@ class CameraParameterTree(ParameterTree):
         self.t.setParameters(self.p, showTop=False)
         self.t.setWindowTitle('Parameter Tree')
         
+        self.save()
+        
     def change(self, param, changes):
         print("tree changes:")
         for param, change, data in changes:
@@ -107,6 +104,8 @@ class CameraParameterTree(ParameterTree):
 
 ## Start Qt event loop unless running in interactive mode or using pyside.
 if __name__ == '__main__':
+    app = QtGui.QApplication([])
+
     import sys
     param_tree = CameraParameterTree()
     win = QtGui.QWidget()