Some problems with a mayavi code

[Mike]

Dear All,

I have the following codes, and have problems as follows:

・The plot is not displayed until the cmap is changed, Can I fix it?
・The name of the windows is "Edit properties", can I change it to Mayavi scence?

def show(self):
  print "Plotting...",
  mlab.view(distance = 'auto')
  mlab.outline( line_width=1.0, opacity=0.3 )
  mlab.axes()
  mlab.show()

def __init__(self, arg1, arg2, arg3, arg4):
    HasTraits.__init__(self)
    self.file_peaks = arg1
    self.file_pat_dist = arg2
    self.file_hess_dist = arg3
    self.file_id_dist = arg4

@on_trait_change('lower_threshold_for_cmap,upper_threshold_for_cmap')
def update_plot(self):
     mlab.clf()
 peaks = self.add_peak(self.file_peaks)
     self.add_grid(self.file_pat_dist, cmap=[self.lower_threshold_for_cmap, self.upper_threshold_for_cmap])  # [0.02, 0.4]
     self.show()


scene = Instance(MlabSceneModel, ()) 
# The layout of the dialog created   
view = View(Item('scene', editor=SceneEditor(scene_class=MayaviScene), height=350, width=350, show_label=False),
            Group('_', 'lower_threshold_for_cmap', 'upper_threshold_for_cmap'), resizable=True)

          Kind Regards
          Mike