我想改变turtle中可拖动的poly的大小,使poly周围有一个宽阔的边框?
下面是部分代码。
from turtle import Turtle,Shape,Screen
def simple_polygon(turtle):
shape = Shape("compound")
turtle.begin_poly()
turtle.circle(50)
shape.addcomponent(turtle.get_poly(), "yellow", "green") # component #2
screen.register_shape("simple_polygon", shape)
turtle.reset()
def drag_handler(turtle, x, y):
turtle.ondrag(None) # disable ondrag event inside drag_handler
turtle.goto(x, y)
turtle.ondrag(lambda x, y, turtle=turtle: drag_handler(turtle, x, y))
screen = Screen()
magic_marker = Turtle()
simple_polygon(magic_marker)
magic_marker.hideturtle()
mostly_green = Turtle(shape="simple_polygon")
mostly_green.penup()
mostly_green.goto(150, 150)
mostly_green.ondrag(lambda x, y: drag_handler(red, x, y))
screen.mainloop()
谁能告诉我是怎么做的?
是否可以改变海龟中可拖动的多边形的大小,使多边形周围有一个宽边框?
是的,可以。不是在多边形创建或注册时,而是通过 outline
争论 shapesize()
(又名 turtlesize()
),一旦它被设置为海龟光标。
from turtle import Screen, Turtle
def drag_handler(x, y):
turtle.ondrag(None) # disable event inside handler
turtle.goto(x, y)
turtle.ondrag(drag_handler)
screen = Screen()
turtle = Turtle()
turtle.begin_poly()
turtle.circle(50)
turtle.end_poly()
screen.register_shape('simple_polygon', turtle.get_poly())
turtle.reset()
turtle.shape('simple_polygon')
turtle.color('green', 'yellow')
turtle.shapesize(outline=25)
turtle.penup()
turtle.ondrag(drag_handler)
screen.mainloop()
这就是 不 对所举问题的回答,因为复合龟的形式很多,不能拖泥带水。 但这是一件有用的事情。