plot.py 文件源码

def draw_line(self, pos, horizontal=False, label=None,
                  color='gray90', label_color='gray35', **_):
        """Draw one horizontal or vertical line with optional color and label"""
        if pos is None:
            return
        if pos < self.zoom_area[0 + horizontal] or pos > self.zoom_area[2 + horizontal]:
            return
        turtle.penup()
        xscale = turtle.getscreen().xscale
        yscale = turtle.getscreen().yscale
        if label:
            font_family, font_size = self.font
            turtle.color(label_color)
            turtle.setposition(*self.label_pos(pos=pos, label=label, horizontal=horizontal))
            turtle.write(label, align='right' if horizontal else'center',
                         font=(font_family, font_size))
            turtle.setposition(-4 / xscale if horizontal else pos,
                               pos if horizontal else -4 / yscale)
            turtle.pendown()
        turtle.setposition(1 / xscale if horizontal else pos,
                           pos if horizontal else 1 / yscale)
        turtle.color(color)
        turtle.pendown()
        turtle.setposition(self.plot_area[2] if horizontal else pos,
                           pos if horizontal else self.plot_area[3])
        turtle.penup()