/
testvectorfieldplot.py
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testvectorfieldplot.py
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import numpy as np
from holoviews.element import VectorField
from .testplot import TestBokehPlot, bokeh_renderer
from ..utils import ParamLogStream
try:
from bokeh.models import LinearColorMapper, CategoricalColorMapper
except:
pass
class TestVectorFieldPlot(TestBokehPlot):
###########################
# Styling mapping #
###########################
def test_vectorfield_color_op(self):
vectorfield = VectorField([(0, 0, 0, 1, '#000'), (0, 1, 0, 1,'#F00'), (0, 2, 0, 1,'#0F0')],
vdims=['A', 'M', 'color']).options(color='color')
plot = bokeh_renderer.get_plot(vectorfield)
cds = plot.handles['cds']
glyph = plot.handles['glyph']
self.assertEqual(cds.data['color'], np.array(['#000', '#F00', '#0F0', '#000',
'#F00', '#0F0', '#000', '#F00', '#0F0']))
self.assertEqual(glyph.line_color, {'field': 'color'})
def test_vectorfield_linear_color_op(self):
vectorfield = VectorField([(0, 0, 0, 1, 0), (0, 1, 0, 1, 1), (0, 2, 0, 1, 2)],
vdims=['A', 'M', 'color']).options(color='color')
plot = bokeh_renderer.get_plot(vectorfield)
cds = plot.handles['cds']
glyph = plot.handles['glyph']
cmapper = plot.handles['color_color_mapper']
self.assertTrue(cmapper, LinearColorMapper)
self.assertEqual(cmapper.low, 0)
self.assertEqual(cmapper.high, 2)
self.assertEqual(cds.data['color'], np.array([0, 1, 2, 0, 1, 2, 0, 1, 2]))
self.assertEqual(glyph.line_color, {'field': 'color', 'transform': cmapper})
def test_vectorfield_categorical_color_op(self):
vectorfield = VectorField([(0, 0, 0, 1, 'A'), (0, 1, 0, 1, 'B'), (0, 2, 0, 1, 'C')],
vdims=['A', 'M', 'color']).options(color='color')
plot = bokeh_renderer.get_plot(vectorfield)
cds = plot.handles['cds']
glyph = plot.handles['glyph']
cmapper = plot.handles['color_color_mapper']
self.assertTrue(cmapper, CategoricalColorMapper)
self.assertEqual(cmapper.factors, ['A', 'B', 'C'])
self.assertEqual(cds.data['color'], np.array(['A', 'B', 'C', 'A', 'B', 'C', 'A', 'B', 'C']))
self.assertEqual(glyph.line_color, {'field': 'color', 'transform': cmapper})
def test_vectorfield_alpha_op(self):
vectorfield = VectorField([(0, 0, 0, 1, 0), (0, 1, 0, 1, 0.2), (0, 2, 0, 1, 0.7)],
vdims=['A', 'M', 'alpha']).options(alpha='alpha')
plot = bokeh_renderer.get_plot(vectorfield)
cds = plot.handles['cds']
glyph = plot.handles['glyph']
self.assertEqual(cds.data['alpha'], np.array([0, 0.2, 0.7, 0, 0.2, 0.7, 0, 0.2, 0.7]))
self.assertEqual(glyph.line_alpha, {'field': 'alpha'})
def test_vectorfield_line_width_op(self):
vectorfield = VectorField([(0, 0, 0, 1, 1), (0, 1, 0, 1, 4), (0, 2, 0, 1, 8)],
vdims=['A', 'M', 'line_width']).options(line_width='line_width')
plot = bokeh_renderer.get_plot(vectorfield)
cds = plot.handles['cds']
glyph = plot.handles['glyph']
self.assertEqual(cds.data['line_width'], np.array([1, 4, 8, 1, 4, 8, 1, 4, 8]))
self.assertEqual(glyph.line_width, {'field': 'line_width'})
def test_vectorfield_color_index_color_clash(self):
vectorfield = VectorField([(0, 0, 0), (0, 1, 1), (0, 2, 2)],
vdims='color').options(line_color='color', color_index='color')
with ParamLogStream() as log:
bokeh_renderer.get_plot(vectorfield)
log_msg = log.stream.read()
warning = ("Cannot declare style mapping for 'line_color' option "
"and declare a color_index; ignoring the color_index.\n")
self.assertEqual(log_msg, warning)