Fix HistogramLUTWidget with background parameter (#953)
* Fix HistogramLUTWidget with background parameter HistogramLUTWidget cannot be initialized with the `background` parameter, because all parameters are also passed to the constructor of HistogramLUTItem which does not have a `background` parameter. This pull request fixes that issue by defining `background` explicitly as parameter in the function header. Closes #175 * Added test for HistogramLUTWidget initialization with background * Fixed Python2 compatibility * Do not pg.exit() after test * Moved test_histogramlutwidget to widget tests
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@ -13,7 +13,7 @@ __all__ = ['HistogramLUTWidget']
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class HistogramLUTWidget(GraphicsView):
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class HistogramLUTWidget(GraphicsView):
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def __init__(self, parent=None, *args, **kargs):
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def __init__(self, parent=None, *args, **kargs):
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background = kargs.get('background', 'default')
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background = kargs.pop('background', 'default')
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GraphicsView.__init__(self, parent, useOpenGL=False, background=background)
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GraphicsView.__init__(self, parent, useOpenGL=False, background=background)
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self.item = HistogramLUTItem(*args, **kargs)
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self.item = HistogramLUTItem(*args, **kargs)
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self.setCentralItem(self.item)
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self.setCentralItem(self.item)
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44
pyqtgraph/widgets/tests/test_histogramlutwidget.py
Normal file
44
pyqtgraph/widgets/tests/test_histogramlutwidget.py
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@ -0,0 +1,44 @@
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"""
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HistogramLUTWidget test:
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Tests the creation of a HistogramLUTWidget.
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"""
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import pyqtgraph as pg
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from pyqtgraph.Qt import QtGui
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import numpy as np
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def testHistogramLUTWidget():
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pg.mkQApp()
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win = QtGui.QMainWindow()
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win.show()
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cw = QtGui.QWidget()
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win.setCentralWidget(cw)
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l = QtGui.QGridLayout()
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cw.setLayout(l)
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l.setSpacing(0)
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v = pg.GraphicsView()
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vb = pg.ViewBox()
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vb.setAspectLocked()
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v.setCentralItem(vb)
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l.addWidget(v, 0, 0, 3, 1)
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w = pg.HistogramLUTWidget(background='w')
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l.addWidget(w, 0, 1)
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data = pg.gaussianFilter(np.random.normal(size=(256, 256, 3)), (20, 20, 0))
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for i in range(32):
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for j in range(32):
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data[i*8, j*8] += .1
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img = pg.ImageItem(data)
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vb.addItem(img)
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vb.autoRange()
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w.setImageItem(img)
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QtGui.QApplication.processEvents()
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