tab_covariance.py 文件源码

def setGradientEditor(self, gradient_editor):
            ge = gradient_editor
            image = self.image

            hist_pen = pg.mkPen((170, 57, 57, 255), width=1.)
            image.setLookupTable(ge.getLookupTable)

            def updateLevels():
                image.setLevels(ge.region.getRegion())

            ge.sigLevelChangeFinished.connect(updateLevels)
            ge.sigLevelsChanged.connect(updateLevels)
            updateLevels()

            def updateHistogram():
                h = image.getHistogram()
                if h[0] is None:
                    return
                ge.hist_syn.setData(*h)

            ge.hist_syn = pg.PlotDataItem(pen=hist_pen)
            ge.hist_syn.rotate(90.)
            ge.vb.addItem(ge.hist_syn)
            updateHistogram()

            image.sigImageChanged.connect(updateHistogram)