pyqtgraph/tests/graphicsItems/test_ROI.py

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# -*- coding: utf-8 -*-
import numpy as np
import pytest
import pyqtgraph as pg
import platform
from pyqtgraph.Qt import QtCore, QtGui, QtTest
from tests.image_testing import assertImageApproved
from tests.ui_testing import mouseMove, mouseDrag, mouseClick, resizeWindow
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import math
app = pg.mkQApp()
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pg.setConfigOption("mouseRateLimit", 0)
def test_getArrayRegion(transpose=False):
pr = pg.PolyLineROI([[0, 0], [27, 0], [0, 28]], closed=True)
pr.setPos(1, 1)
rois = [
(pg.ROI([1, 1], [27, 28], pen='y'), 'baseroi'),
(pg.RectROI([1, 1], [27, 28], pen='y'), 'rectroi'),
(pg.EllipseROI([1, 1], [27, 28], pen='y'), 'ellipseroi'),
(pr, 'polylineroi'),
]
for roi, name in rois:
# For some ROIs, resize should not be used.
testResize = not isinstance(roi, pg.PolyLineROI)
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origMode = pg.getConfigOption('imageAxisOrder')
try:
if transpose:
pg.setConfigOptions(imageAxisOrder='row-major')
check_getArrayRegion(roi, 'roi/'+name, testResize, transpose=True)
else:
pg.setConfigOptions(imageAxisOrder='col-major')
check_getArrayRegion(roi, 'roi/'+name, testResize)
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finally:
pg.setConfigOptions(imageAxisOrder=origMode)
def test_getArrayRegion_axisorder():
test_getArrayRegion(transpose=True)
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def check_getArrayRegion(roi, name, testResize=True, transpose=False):
# on windows, edges corner pixels seem to be slightly different from other platforms
# giving a pxCount=2 for a fudge factor
if isinstance(roi, (pg.ROI, pg.RectROI)) and platform.system() == "Windows":
pxCount = 2
else:
pxCount=-1
initState = roi.getState()
win = pg.GraphicsView()
win.show()
resizeWindow(win, 200, 400)
# Don't use Qt's layouts for testing--these generate unpredictable results.
# Instead, place the viewboxes manually
vb1 = pg.ViewBox()
win.scene().addItem(vb1)
vb1.setPos(6, 6)
vb1.resize(188, 191)
vb2 = pg.ViewBox()
win.scene().addItem(vb2)
vb2.setPos(6, 203)
vb2.resize(188, 191)
img1 = pg.ImageItem(border='w')
img2 = pg.ImageItem(border='w')
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vb1.addItem(img1)
vb2.addItem(img2)
np.random.seed(0)
data = np.random.normal(size=(7, 30, 31, 5))
data[0, :, :, :] += 10
data[:, 1, :, :] += 10
data[:, :, 2, :] += 10
data[:, :, :, 3] += 10
if transpose:
data = data.transpose(0, 2, 1, 3)
img1.setImage(data[0, ..., 0])
vb1.setAspectLocked()
vb1.enableAutoRange(True, True)
roi.setZValue(10)
vb1.addItem(roi)
if isinstance(roi, pg.RectROI):
if transpose:
assert roi.getAffineSliceParams(data, img1, axes=(1, 2)) == ([28.0, 27.0], ((1.0, 0.0), (0.0, 1.0)), (1.0, 1.0))
else:
assert roi.getAffineSliceParams(data, img1, axes=(1, 2)) == ([27.0, 28.0], ((1.0, 0.0), (0.0, 1.0)), (1.0, 1.0))
rgn = roi.getArrayRegion(data, img1, axes=(1, 2))
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#assert np.all((rgn == data[:, 1:-2, 1:-2, :]) | (rgn == 0))
img2.setImage(rgn[0, ..., 0])
vb2.setAspectLocked()
vb2.enableAutoRange(True, True)
app.processEvents()
assertImageApproved(win, name+'/roi_getarrayregion', 'Simple ROI region selection.', pxCount=pxCount)
with pytest.raises(TypeError):
roi.setPos(0, False)
roi.setPos([0.5, 1.5])
rgn = roi.getArrayRegion(data, img1, axes=(1, 2))
img2.setImage(rgn[0, ..., 0])
app.processEvents()
assertImageApproved(win, name+'/roi_getarrayregion_halfpx', 'Simple ROI region selection, 0.5 pixel shift.', pxCount=pxCount)
roi.setAngle(45)
roi.setPos([3, 0])
rgn = roi.getArrayRegion(data, img1, axes=(1, 2))
img2.setImage(rgn[0, ..., 0])
app.processEvents()
assertImageApproved(win, name+'/roi_getarrayregion_rotate', 'Simple ROI region selection, rotation.', pxCount=pxCount)
if testResize:
roi.setSize([60, 60])
rgn = roi.getArrayRegion(data, img1, axes=(1, 2))
img2.setImage(rgn[0, ..., 0])
app.processEvents()
assertImageApproved(win, name+'/roi_getarrayregion_resize', 'Simple ROI region selection, resized.', pxCount=pxCount)
img1.setPos(0, img1.height())
img1.setTransform(QtGui.QTransform().scale(1, -1).rotate(20), True)
rgn = roi.getArrayRegion(data, img1, axes=(1, 2))
img2.setImage(rgn[0, ..., 0])
app.processEvents()
assertImageApproved(win, name+'/roi_getarrayregion_img_trans', 'Simple ROI region selection, image transformed.', pxCount=pxCount)
vb1.invertY()
rgn = roi.getArrayRegion(data, img1, axes=(1, 2))
img2.setImage(rgn[0, ..., 0])
app.processEvents()
assertImageApproved(win, name+'/roi_getarrayregion_inverty', 'Simple ROI region selection, view inverted.', pxCount=pxCount)
roi.setState(initState)
img1.setPos(0, 0)
img1.setTransform(QtGui.QTransform.fromScale(1, 0.5))
rgn = roi.getArrayRegion(data, img1, axes=(1, 2))
img2.setImage(rgn[0, ..., 0])
app.processEvents()
assertImageApproved(win, name+'/roi_getarrayregion_anisotropic', 'Simple ROI region selection, image scaled anisotropically.', pxCount=pxCount)
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# allow the roi to be re-used
roi.scene().removeItem(roi)
win.hide()
def test_mouseClickEvent():
plt = pg.GraphicsView()
plt.show()
resizeWindow(plt, 200, 200)
vb = pg.ViewBox()
plt.scene().addItem(vb)
vb.resize(200, 200)
QtTest.QTest.qWaitForWindowExposed(plt)
QtTest.QTest.qWait(100)
roi = pg.RectROI((0, 0), (10, 20), removable=True)
vb.addItem(roi)
app.processEvents()
mouseClick(plt, roi.mapToScene(pg.Point(2, 2)), QtCore.Qt.MouseButton.LeftButton)
def test_PolyLineROI():
rois = [
(pg.PolyLineROI([[0, 0], [10, 0], [0, 15]], closed=True, pen=0.3), 'closed'),
(pg.PolyLineROI([[0, 0], [10, 0], [0, 15]], closed=False, pen=0.3), 'open')
]
#plt = pg.plot()
plt = pg.GraphicsView()
plt.show()
resizeWindow(plt, 200, 200)
vb = pg.ViewBox()
plt.scene().addItem(vb)
vb.resize(200, 200)
#plt.plotItem = pg.PlotItem()
#plt.scene().addItem(plt.plotItem)
#plt.plotItem.resize(200, 200)
plt.scene().minDragTime = 0 # let us simulate mouse drags very quickly.
# seemingly arbitrary requirements; might need longer wait time for some platforms..
QtTest.QTest.qWaitForWindowExposed(plt)
QtTest.QTest.qWait(100)
for r, name in rois:
vb.clear()
vb.addItem(r)
vb.autoRange()
app.processEvents()
assertImageApproved(plt, 'roi/polylineroi/'+name+'_init', 'Init %s polyline.' % name)
initState = r.getState()
assert len(r.getState()['points']) == 3
# hover over center
center = r.mapToScene(pg.Point(3, 3))
mouseMove(plt, center)
assertImageApproved(plt, 'roi/polylineroi/'+name+'_hover_roi', 'Hover mouse over center of ROI.')
# drag ROI
mouseDrag(plt, center, center + pg.Point(10, -10), QtCore.Qt.MouseButton.LeftButton)
assertImageApproved(plt, 'roi/polylineroi/'+name+'_drag_roi', 'Drag mouse over center of ROI.')
# hover over handle
pt = r.mapToScene(pg.Point(r.getState()['points'][2]))
mouseMove(plt, pt)
assertImageApproved(plt, 'roi/polylineroi/'+name+'_hover_handle', 'Hover mouse over handle.')
# drag handle
mouseDrag(plt, pt, pt + pg.Point(5, 20), QtCore.Qt.MouseButton.LeftButton)
assertImageApproved(plt, 'roi/polylineroi/'+name+'_drag_handle', 'Drag mouse over handle.')
# hover over segment
pt = r.mapToScene((pg.Point(r.getState()['points'][2]) + pg.Point(r.getState()['points'][1])) * 0.5)
mouseMove(plt, pt+pg.Point(0, 2))
assertImageApproved(plt, 'roi/polylineroi/'+name+'_hover_segment', 'Hover mouse over diagonal segment.')
# click segment
mouseClick(plt, pt, QtCore.Qt.MouseButton.LeftButton)
assertImageApproved(plt, 'roi/polylineroi/'+name+'_click_segment', 'Click mouse over segment.')
# drag new handle
mouseMove(plt, pt+pg.Point(10, -10)) # pg bug: have to move the mouse off/on again to register hover
mouseDrag(plt, pt, pt + pg.Point(10, -10), QtCore.Qt.MouseButton.LeftButton)
assertImageApproved(plt, 'roi/polylineroi/'+name+'_drag_new_handle', 'Drag mouse over created handle.')
# clear all points
r.clearPoints()
assertImageApproved(plt, 'roi/polylineroi/'+name+'_clear', 'All points cleared.')
assert len(r.getState()['points']) == 0
# call setPoints
r.setPoints(initState['points'])
assertImageApproved(plt, 'roi/polylineroi/'+name+'_setpoints', 'Reset points to initial state.')
assert len(r.getState()['points']) == 3
# call setState
r.setState(initState)
assertImageApproved(plt, 'roi/polylineroi/'+name+'_setstate', 'Reset ROI to initial state.')
assert len(r.getState()['points']) == 3
plt.hide()
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@pytest.mark.parametrize("p1,p2", [
((1, 1), (2, 5)),
((0.1, 0.1), (-1, 5)),
((3, -1), (5, -6)),
((-2, 1), (-4, -8)),
])
def test_LineROI_coords(p1, p2):
pw = pg.plot()
lineroi = pg.LineROI(p1, p2, width=0.5, pen="r")
pw.addItem(lineroi)
# first two handles are the scale-rotate handles positioned by pos1, pos2
for expected, (name, scenepos) in zip([p1, p2], lineroi.getSceneHandlePositions()):
got = lineroi.mapSceneToParent(scenepos)
assert math.isclose(got.x(), expected[0])
assert math.isclose(got.y(), expected[1])