geom_vline.py 文件源码

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

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

        Returns
        -------
        out : DrawingArea
        """
        x = [0.5 * da.width] * 2
        y = [0, da.height]
        data['size'] *= SIZE_FACTOR
        key = mlines.Line2D(x,
                            y,
                            alpha=data['alpha'],
                            linestyle=data['linetype'],
                            linewidth=data['size'],
                            color=data['color'],
                            solid_capstyle='butt',
                            antialiased=False)
        da.add_artist(key)
        return da