geom_boxplot.py 文件源码

def draw_legend(data, da, lyr):
        """
        Draw a rectangle in the box

        Parameters
        ----------
        data : dataframe
        da : DrawingArea
        lyr : layer

        Returns
        -------
        out : DrawingArea
        """
        data['size'] *= SIZE_FACTOR

        # box
        facecolor = to_rgba(data['fill'], data['alpha'])
        if facecolor is None:
            facecolor = 'none'

        kwargs = dict(
           linestyle=data['linetype'],
           linewidth=data['size'])

        box = Rectangle((da.width*.125, da.height*.25),
                        width=da.width*.75,
                        height=da.height*.5,
                        facecolor=facecolor,
                        edgecolor=data['color'],
                        capstyle='projecting',
                        antialiased=False,
                        **kwargs)
        da.add_artist(box)

        kwargs['solid_capstyle'] = 'butt'
        kwargs['color'] = data['color']
        # middle strike through
        strike = mlines.Line2D([da.width*.125, da.width*.875],
                               [da.height*.5, da.height*.5],
                               **kwargs)
        da.add_artist(strike)

        # whiskers
        top = mlines.Line2D([da.width*.5, da.width*.5],
                            [da.height*.75, da.height*.9],
                            **kwargs)
        da.add_artist(top)

        bottom = mlines.Line2D([da.width*.5, da.width*.5],
                               [da.height*.25, da.height*.1],
                               **kwargs)
        da.add_artist(bottom)
        return da