def menuActionNegative(self):
# copy current state
old = self.history[self.historyIndex]
matrix = old['matrix'].copy()
histogram = deepcopy(old['histogram']['plots'][0])
# apply negative function
matrix = Transform.negative(matrix)
# compute histogram
histogram = {
'plots': [Histogram.hist(matrix)],
'legend': ["Negative"]
}
# add new state
self.appendHistory({
'matrix': matrix,
'histogram': histogram,
'saved': False
})
self.updateImage(matrix)
hist = [old['histogram']['plots'][0]] + histogram['plots']
legend = ["Old"] + histogram['legend']
self.windowHist.setHistogram(hist, legend)
