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# -*- coding: utf-8 -*-
import numpy as np
from numpy.testing import assert_allclose
from vispy.scene.visuals import Text
from vispy.testing import (requires_application, TestingCanvas,
run_tests_if_main)
from vispy.testing.image_tester import assert_image_approved
@requires_application()
def test_text():
"""Test basic text support"""
with TestingCanvas(bgcolor='w', size=(92, 92), dpi=92) as c:
pos = [92 // 2] * 2
text = Text('testing', font_size=20, color='k',
pos=pos, anchor_x='center', anchor_y='baseline',
parent=c.scene)
# Test image created in Illustrator CS5, 1"x1" output @ 92 DPI
assert_image_approved(c.render(), 'visuals/text1.png')
text.text = ['foo', 'bar']
text.pos = [10, 10] # should auto-replicate
text.rotation = [180, 270]
try:
text.pos = [10]
except Exception:
pass
else:
raise AssertionError('Exception not raised')
c.update()
c.app.process_events()
text.pos = [[10, 10], [10, 20]]
text.text = 'foobar'
c.update()
c.app.process_events()
@requires_application()
def test_text_rotation_update():
# Regression test for a bug that caused text labels to not be redrawn
# if the rotation angle was updated
with TestingCanvas() as c:
text = Text('testing', pos=(100, 100), parent=c.scene)
c.update()
c.app.process_events()
assert_allclose(text.shared_program['a_rotation'], 0.)
text.rotation = 30.
c.update()
c.app.process_events()
assert_allclose(text.shared_program['a_rotation'], np.radians(30.))
run_tests_if_main()
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