guiutils.py 文件源码

def refresh_colorbar(self, cb_min, cb_max, width = None, height = None, xMin = None, yMin = None):
        """ Refresh the appearance of the colorbar for a changed count range.

        @param float cb_min: The minimal count value should be passed here.
        @param float cb_max: The maximal count value should be passed here.
        @param float width: optional, with that you can change the width of the
                            colorbar in the display.
        """

        if width is None:
            width = self.width
        else:
            self.width = width

#       FIXME: Until now, if you want to refresh the colorbar, a new QPainter
#              object has been created, but I think that it is not necassary.
#              I have to figure out how to use the created object properly.
        p = pg.QtGui.QPainter(self.pic)
        p.drawRect(self.boundingRect())
        p.setPen(pg.mkPen('k'))
        grad = pg.QtGui.QLinearGradient(width/2.0, cb_min*1.0, width/2.0, cb_max*1.0)
        for stop, color in zip(self.stops, self.colors):
            grad.setColorAt(1.0 - stop, pg.QtGui.QColor(*[255*c for c in color]))
        p.setBrush(pg.QtGui.QBrush(grad))
        if xMin is None:
            p.drawRect(pg.QtCore.QRectF(0, cb_min, width, cb_max-cb_min))
        else:
            # If this picture whants to be set in a plot, which is going to be
            # saved:
            p.drawRect(pg.QtCore.QRectF(xMin, yMin, width, height))
        p.end()

        vb = self.getViewBox()
        # check whether a viewbox is already created for this object. If yes,
        # then it should be adjusted according to the full screen.
        if vb is not None:
            vb.updateAutoRange()
            vb.enableAutoRange()