ASCEE/pyqtgraph
5
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Merge pull request #1311 from campagnola/acq4-merge

Browse Source 
performance fix for histogramlutitem
This commit is contained in:
Luke Campagnola 2020-07-13 16:59:05 -07:00 committed by GitHub
commit 4562c06576
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 10 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
pyqtgraph/graphicsItems/HistogramLUTItem.py
View File

@ -165,7 +165,7 @@ class HistogramLUTItem(GraphicsWidget):
"""
self.imageItem = weakref.ref(img)
img.sigImageChanged.connect(self.imageChanged)
img.setLookupTable(self.getLookupTable) ## send function pointer, not the result
self._setImageLookupTable()
self.regionChanged()
self.imageChanged(autoLevel=True)
@ -174,14 +174,17 @@ class HistogramLUTItem(GraphicsWidget):
def gradientChanged(self):
if self.imageItem() is not None:
if self.gradient.isLookupTrivial():
self.imageItem().setLookupTable(None) #lambda x: x.astype(np.uint8))
else:
self.imageItem().setLookupTable(self.getLookupTable) ## send function pointer, not the result
self._setImageLookupTable()
self.lut = None
self.sigLookupTableChanged.emit(self)
def _setImageLookupTable(self):
if self.gradient.isLookupTrivial():
self.imageItem().setLookupTable(None) #lambda x: x.astype(np.uint8))
else:
self.imageItem().setLookupTable(self.getLookupTable) ## send function pointer, not the result
def getLookupTable(self, img=None, n=None, alpha=None):
"""Return a lookup table from the color gradient defined by this
HistogramLUTItem.
@ -341,6 +344,7 @@ class HistogramLUTItem(GraphicsWidget):
}
def restoreState(self, state):
self.setLevelMode(state['mode'])
if 'mode' in state:
self.setLevelMode(state['mode'])
self.gradient.restoreState(state['gradient'])
self.setLevels(*state['levels'])