Fixed database typo and removed unnecessary class identifier.

venv/Lib/site-packages/skimage/viewer/tests/test_widgets.py

@@ -0,0 +1,129 @@
+import os
+
+from skimage import data, img_as_float, io, img_as_uint
+
+from skimage.viewer import ImageViewer
+from skimage.viewer.qt import QtWidgets, QtCore, has_qt
+from skimage.viewer.widgets import (
+    Slider, OKCancelButtons, SaveButtons, ComboBox, CheckBox, Text)
+from skimage.viewer.plugins.base import Plugin
+
+from skimage._shared import testing
+from skimage._shared.testing import assert_almost_equal, assert_equal
+
+
+def get_image_viewer():
+    image = data.coins()
+    viewer = ImageViewer(img_as_float(image))
+    viewer += Plugin()
+    return viewer
+
+
+@testing.skipif(not has_qt, reason="Qt not installed")
+def test_check_box():
+    viewer = get_image_viewer()
+    cb = CheckBox('hello', value=True, alignment='left')
+    viewer.plugins[0] += cb
+
+    assert_equal(cb.val, True)
+    cb.val = False
+    assert_equal(cb.val, False)
+    cb.val = 1
+    assert_equal(cb.val, True)
+    cb.val = 0
+    assert_equal(cb.val, False)
+
+
+@testing.skipif(not has_qt, reason="Qt not installed")
+def test_combo_box():
+    viewer = get_image_viewer()
+    cb = ComboBox('hello', ('a', 'b', 'c'))
+    viewer.plugins[0] += cb
+
+    assert_equal(str(cb.val), 'a')
+    assert_equal(cb.index, 0)
+    cb.index = 2
+    assert_equal(str(cb.val), 'c'),
+    assert_equal(cb.index, 2)
+
+
+@testing.skipif(not has_qt, reason="Qt not installed")
+def test_text_widget():
+    viewer = get_image_viewer()
+    txt = Text('hello', 'hello, world!')
+    viewer.plugins[0] += txt
+
+    assert_equal(str(txt.text), 'hello, world!')
+    txt.text = 'goodbye, world!'
+    assert_equal(str(txt.text), 'goodbye, world!')
+
+
+@testing.skipif(not has_qt, reason="Qt not installed")
+def test_slider_int():
+    viewer = get_image_viewer()
+    sld = Slider('radius', 2, 10, value_type='int')
+    viewer.plugins[0] += sld
+
+    assert_equal(sld.val, 4)
+    sld.val = 6
+    assert_equal(sld.val, 6)
+    sld.editbox.setText('5')
+    sld._on_editbox_changed()
+    assert_equal(sld.val, 5)
+
+
+@testing.skipif(not has_qt, reason="Qt not installed")
+def test_slider_float():
+    viewer = get_image_viewer()
+    sld = Slider('alpha', 2.1, 3.1, value=2.1, value_type='float',
+                 orientation='vertical', update_on='move')
+    viewer.plugins[0] += sld
+
+    assert_equal(sld.val, 2.1)
+    sld.val = 2.5
+    assert_almost_equal(sld.val, 2.5, 2)
+    sld.editbox.setText('0.1')
+    sld._on_editbox_changed()
+    assert_almost_equal(sld.val, 2.5, 2)
+
+
+@testing.skipif(True, reason="Can't automatically close window. See #3081.")
+@testing.skipif(not has_qt, reason="Qt not installed")
+def test_save_buttons():
+    viewer = get_image_viewer()
+    sv = SaveButtons()
+    viewer.plugins[0] += sv
+
+    import tempfile
+    fid, filename = tempfile.mkstemp(suffix='.png')
+    os.close(fid)
+
+    timer = QtCore.QTimer()
+    timer.singleShot(100, QtWidgets.QApplication.quit)
+
+    # exercise the button clicks
+    sv.save_stack.click()
+    sv.save_file.click()
+
+    # call the save functions directly
+    sv.save_to_stack()
+    sv.save_to_file(filename)
+
+    img = data.imread(filename)
+
+    assert_almost_equal(img, img_as_uint(viewer.image))
+
+    img = io.pop()
+    assert_almost_equal(img, viewer.image)
+
+    os.remove(filename)
+
+
+@testing.skipif(not has_qt, reason="Qt not installed")
+def test_ok_buttons():
+    viewer = get_image_viewer()
+    ok = OKCancelButtons()
+    viewer.plugins[0] += ok
+
+    ok.update_original_image(),
+    ok.close_plugin()