On Thu, Feb 24, 2011 at 11:30:41AM +0000, David Flitney wrote:
> class Visualization(HasTraits):
> ...
> @on_trait_change('surf_filename, cons_filename')
> def update_data(self):
> try:
> if check_files(self.surf_filename, self.cons_filename):
> self.update_plot()
> ...
> def picker_callback(self, picker):
> """ Picker callback: this get called when on pick events.
> """
> print "Picking..."
> ...
> @on_trait_change('scene.activated')
> def update_plot(self):
> print "Updating..."
> self.scene.mlab.clf()
> ...
> self.picker =
> self.scene.mayavi_scene.on_mouse_pick(self.picker_callback)
> self.picker.tolerance = 0.001
> All is well for the first rendering of the scene: picker_callback() is
> getting called appropriately, but when I subsequently call clf(), in the
> context of update_data(), and rebuild the scene from the newly selected
> datasets my callback no longer gets called. Note the default, 'p'
> activated, picker is working.
> Can anyone suggest what I might have done wrong?
Seems like a bug to me.
What if you replace the call to mlab.clf by::
scene = self.figure
scene.scene.disable_render = True
scene.scene.disable_render = disable_render
and you don't re-register the callback (the difference with clf is that
the code above does not clear the callbacks?
G
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