def testImageItem(self):
"""Check that an ImageData plot item can be used"""
dialog = self.colormapDiag
colormap = Colormap(name='gray', vmin=None, vmax=None)
data = numpy.arange(3**2).reshape(3, 3)
item = ImageData()
item.setData(data, copy=False)
dialog.setColormap(colormap)
dialog.show()
self.qapp.processEvents()
dialog.setItem(item)
vrange = dialog._getFiniteColormapRange()
self.assertEqual(vrange, (0, 8))
def testItemDel(self):
"""Check that the plot items are not hard linked to the dialog"""
dialog = self.colormapDiag
colormap = Colormap(name='gray', vmin=None, vmax=None)
data = numpy.arange(3**2).reshape(3, 3)
item = ImageData()
item.setData(data, copy=False)
dialog.setColormap(colormap)
dialog.show()
self.qapp.processEvents()
dialog.setItem(item)
previousRange = dialog._getFiniteColormapRange()
del item
vrange = dialog._getFiniteColormapRange()
self.assertNotEqual(vrange, previousRange)