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"""A simple grid plane module.
"""
# Author: Prabhu Ramachandran <prabhu_r@users.sf.net>
# Copyright (c) 2005, Enthought, Inc.
# License: BSD Style.
# Enthought library imports.
from traits.api import Instance
from traitsui.api import View, Group, Item
# Local imports
from mayavi.core.module import Module
from mayavi.components import grid_plane
from mayavi.components.actor import Actor
from mayavi.core.pipeline_info import PipelineInfo
######################################################################
# `GridPlane` class.
######################################################################
class GridPlane(Module):
# The version of this class. Used for persistence.
__version__ = 0
grid_plane = Instance(grid_plane.GridPlane, allow_none=False,
record=True)
actor = Instance(Actor, allow_non=False, record=True)
input_info = PipelineInfo(datasets=['image_data',
'structured_grid',
'rectilinear_grid'],
attribute_types=['any'],
attributes=['any'])
view = View(Group(Item(name='grid_plane', style='custom'),
Item(name='actor', style='custom'),
show_labels=False))
######################################################################
# `Module` interface
######################################################################
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.
"""
# Create the components
self.grid_plane = grid_plane.GridPlane()
self.actor = Actor()
# Setup the actor suitably for this module.
prop = self.actor.property
prop.trait_set(backface_culling=0, frontface_culling=0,
representation='w')
self.actor.mapper.scalar_visibility = 0
def update_pipeline(self):
"""Override this method so that it *updates* the tvtk pipeline
when data upstream is known to have changed.
This method is invoked (automatically) when any of the inputs
sends a `pipeline_changed` event.
"""
mm = self.module_manager
if mm is None:
return
# Data is available, so set the input for the grid plane.
self.grid_plane.inputs = [mm.source]
# Set the LUT for the mapper.
self.actor.set_lut(mm.scalar_lut_manager.lut)
self.pipeline_changed = True
def update_data(self):
"""Override this method so that it flushes the vtk pipeline if
that is necessary.
This method is invoked (automatically) when any of the inputs
sends a `data_changed` event.
"""
# Just set data_changed, the component should do the rest.
self.data_changed = True
######################################################################
# Non-public methods.
######################################################################
def _grid_plane_changed(self, old, new):
actor = self.actor
if actor is not None:
actor.inputs = [new]
self._change_components(old, new)
def _actor_changed(self, old, new):
new.scene = self.scene
gp = self.grid_plane
if gp is not None:
new.inputs = [gp]
self._change_components(old, new)
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