Don't attempt to set same level mode again
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@ -289,8 +289,10 @@ class HistogramLUTItem(GraphicsWidget):
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"""
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"""
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assert mode in ('mono', 'rgba')
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assert mode in ('mono', 'rgba')
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oldLevels = self.getLevels()
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if mode == self.levelMode:
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return
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oldLevels = self.getLevels()
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self.levelMode = mode
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self.levelMode = mode
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self._showRegions()
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self._showRegions()
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