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"""Simple test for the ImageDataProbe filter.
"""
# Author: Prabhu Ramachandran <prabhu [at] aero . iitb . ac . in>
# Copyright (c) 2008, Enthought, Inc.
# License: BSD Style.
# Standard library imports.
from os.path import abspath
from io import BytesIO
import copy
from pyface.api import GUI
# Local imports.
from common import TestCase, get_example_data
class TestLabels(TestCase):
def check(self, saved=False):
"""Does the checking, if saved is True it does not change the
properties at first to see how those behave and only tests the
final unpickled state."""
script = self.script
e = script.engine
scene = e.current_scene
src = scene.children[0]
mm = src.children[0]
l = mm.children[1]
if not saved:
np = l.visible_points.get_output_dataset().number_of_points
assert np < 35 and np > 20
l.visible_points.enabled = True
l.mapper.label_mode = 'label_scalars'
l.label_format = '%.1f'
l.number_of_labels = 45
l.property.color = (0, 0, 0)
l.property.italic = False
np = l.visible_points.get_output_dataset().number_of_points
assert np < 60 and np > 25
assert l.visible_points.enabled
assert l.visible_points.get_output_dataset() == \
l.visible_points.filter.filter.output
assert l.property.color == (0, 0, 0)
assert not l.property.italic
assert l.mapper.label_mode == 'label_scalars'
assert l.label_format == '%.1f'
def test(self):
self.main()
def do(self):
############################################################
# Imports.
from mayavi.modules.api import ScalarCutPlane
from mayavi.modules.labels import Labels
from mayavi.sources.vtk_xml_file_reader import VTKXMLFileReader
############################################################
# Create a new scene and set up the visualization.
s = self.new_scene()
script = mayavi = self.script
# Read a VTK (old style) data file.
r = VTKXMLFileReader()
r.initialize(get_example_data('fire_ug.vtu'))
script.add_source(r)
# Create the filters.
cp = ScalarCutPlane()
script.add_module(cp)
l = Labels(object=cp)
script.add_module(l)
s.scene.isometric_view()
GUI.process_events()
self.check(saved=False)
############################################################
# Test if saving a visualization and restoring it works.
# Save visualization.
f = BytesIO()
f.name = abspath('test.mv2') # We simulate a file.
script.save_visualization(f)
f.seek(0)
# Remove existing scene.
engine = script.engine
engine.close_scene(s)
# Load visualization
script.load_visualization(f)
s = engine.current_scene
s.scene.isometric_view()
# Seems to be needed for the test to pass. :( Just flushes the
# pipeline.
s.children[0].pipeline_changed = True
GUI.process_events()
# Check.
# Now do the check.
self.check(saved=True)
############################################################
# Test if the Mayavi2 visualization can be deep-copied.
# Pop the source object.
source = s.children.pop()
# Add it back to see if that works without error.
s.children.append(source)
GUI.process_events()
# Now do the check.
s.scene.isometric_view()
self.check(saved=True)
# Now deepcopy the source and replace the existing one with
# the copy. This basically simulates cutting/copying the
# object from the UI via the right-click menu on the tree
# view, and pasting the copy back.
source1 = copy.deepcopy(source)
s.children[0] = source1
GUI.process_events()
# Now do the check.
s.scene.isometric_view()
self.check(saved=True)
GUI.process_events()
# If we have come this far, we are golden!
if __name__ == "__main__":
t = TestLabels()
t.test()
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