main.py 文件源码

def add_dashed_arrow(self, x1, y1, x2, y2, *args):
        with self.arrows_widget.canvas:
            Color(1, 1, 1)
            Line(points=[x1,y1,x2,y2], width=1, dash_length=kivy.metrics.dp(10), dash_offset=kivy.metrics.dp(20))

    # Drawing the arrow head