def __init__(self, renwin, **traits):
super(Picker, self).__init__(**traits)
self.pointpicker = tvtk.PointPicker()
self.cellpicker = tvtk.CellPicker()
self.worldpicker = tvtk.WorldPointPicker()
self.probe_data = tvtk.PolyData()
# Use a set of axis to show the picked point.
self.p_source = tvtk.Axes()
self.p_mapper = tvtk.PolyDataMapper()
self.p_actor = tvtk.Actor()
self.p_source.symmetric = 1
self.p_actor.pickable = 0
self.p_actor.visibility = 0
prop = self.p_actor.property
prop.line_width = 2
prop.ambient = 1.0
prop.diffuse = 0.0
configure_input(self.p_mapper, self.p_source)
self.p_actor.mapper = self.p_mapper
self.probe_data.points = [[0.0, 0.0, 0.0]]
self.text_rep = tvtk.TextRepresentation()
self.text_widget = tvtk.TextWidget()
self.data = PickedData(renwin=renwin)
self.data.text_actor = tvtk.TextActor()
self.text_setup()
self.widgets = False
def setup_pipeline(self):
"""Override this method so that it *creates* the tvtk
pipeline.
This method is invoked when the object is initialized via
`__init__`. Note that at the time this method is called, the
tvtk data pipeline will *not* yet be setup. So upstream data
will not be available. The idea is that you simply create the
basic objects and setup those parts of the pipeline not
dependent on upstream sources and filters. You should also
set the `actors` attribute up at this point.
"""
actor = self.actor = tvtk.TextActor(input=str(self.text))
if VTK_VER > 5.1:
actor.set(text_scale_mode='prop', width=0.4, height=1.0)
else:
actor.set(scaled_text=True, width=0.4, height=1.0)
c = actor.position_coordinate
c.set(coordinate_system='normalized_viewport',
value=(self.x_position, self.y_position, 0.0))
c = actor.position2_coordinate
c.set(coordinate_system='normalized_viewport')
self._property.opacity = 1.0
self._text_changed(self.text)
self._width_changed(self.width)
self._shadow_positions(True)