def test_slicing_rect_inversion(self):
"""Ensures that slicing2rect and rect2slicing are inverse
operations.
"""
a = self.slicing
b = st.slicing2rect(a)
c = st.rect2slicing(b)
self.assertEquals(a, c)
a = self.qrect
b = st.rect2slicing(a)
c = st.slicing2rect(b)
self.assertEquals(a, c)
def test_slicing_rect_inversion(self):
"""Ensures that slicing2rect and rect2slicing are inverse
operations.
"""
a = self.slicing
b = st.slicing2rect(a)
c = st.rect2slicing(b)
self.assertEquals(a, c)
a = self.qrect
b = st.rect2slicing(a)
c = st.slicing2rect(b)
self.assertEquals(a, c)
def setDirty(self, slicing):
"""Mark a region of the image as dirty.
slicing -- if one ore more slices in the slicing
are unbounded, the whole image is marked dirty;
since an image has two dimensions, only the first
two slices in the slicing are used
"""
if not is_pure_slicing(slicing):
raise Exception("dirty region: slicing is not pure")
if not is_bounded(slicing):
self.isDirty.emit(QRect()) # empty rect == everything is dirty
else:
self.isDirty.emit(slicing2rect(slicing))
def setDirty( self, slicing ):
'''Mark a region of the image as dirty.
slicing -- if one ore more slices in the slicing
are unbounded, the whole image is marked dirty;
since an image has two dimensions, only the first
two slices in the slicing are used
'''
if not is_pure_slicing(slicing):
raise Exception('dirty region: slicing is not pure')
if not is_bounded( slicing ):
self.isDirty.emit(QRect()) # empty rect == everything is dirty
else:
self.isDirty.emit(slicing2rect( slicing ))
def test_slicing2rect(self):
qrect = st.slicing2rect(self.slicing)
self.assertEquals(qrect, self.qrect)
def test_slicing2rect(self):
qrect = st.slicing2rect(self.slicing)
self.assertEquals(qrect, self.qrect)
