python - 我在用 Python 乌龟图形制作程序时遇到了一些问题

Question

我对我的代码有一些疑问。

我是 Python 的初学者。然后我开始用 Python 海龟图形制作一个绘图程序并上传到 Github。

我想在单击鼠标左键时画线。当我只是移动鼠标而不单击左键时，乌龟只会跟随我的光标。

所以我用谷歌搜索并找到了一些有用的代码。但它的工作原理很奇怪。我的意思是，它效果不好。

喜欢，当我点击按钮时，乌龟不动。或者我可以通过单击按钮移动乌龟，但线条不画...

无论如何，这里都是我的代码（我认为显示整个代码对你来说会更好......）。

from turtle import Screen

screen = Screen()

while True:

    print('===========================')
    print('*** Welcome to Pyint!!! ***')
    print('___________________________')
    print('*** Drawing With Turtle ***')
    print('___________________________')
    print('******* ver. 2.1.0 ********')
    print('___________________________')
    print('* Press Enter For Start!! *')
    print('___________________________')
    print('===========================')

    import turtle as t
    
    t.color('white')
    t.bgcolor('black')
    t.speed(0)
    t.shape('circle')
    t.pensize(5)
    t.shapesize(2,2,2)

    break

def colorsettings():

    while True:

        print('------------------------')
        print('**** Color Settings ****')
        print('------------------------')

        chgpencolor = t.color(str(input('Color?:')))
        savecolorsettings = str(input('Save the color settings? [y/n]:'))

        if savecolorsettings == 'n':
            continue
        elif savecolorsettings == 'y':
            print('-----------------------')
            print('******** Saved ********')
            print('-----------------------')
            break

def thicknesssettings():
        
        while True:

            print('------------------------')
            print('** Thickness Settings **')
            print('------------------------')

            chgpenthickness = t.pensize(int(input('Thickness?:')))
            savethicknesssettings = str(input('Save the thickness settings? [y/n]:'))

            if savethicknesssettings == 'n':
                continue
            elif savethicknesssettings == 'y':
                print('-----------------------')
                print('******** Saved ********')
                print('-----------------------')
                break

Moving, Dragging = range(2) # Codes about control the turtle start here.

def move_pen(x, y):
    if state != Moving:
        return

    onmove(screen, None)
    t.penup()
    t.setheading(t.towards(x, y))
    t.goto(x, y)
    onmove(screen, move_pen)

def click_pen(x, y):
    global state

    t.onclick(None)
    onmove(screen, None)

    t.onrelease(release_handler)
    t.ondrag(drag_handler)

    state = Dragging

def release_handler(x, y):
    global state

    t.onrelease(None)
    t.ondrag(None)

    t.onclick(click_pen)
    onmove(screen, move_pen)

    state = Moving

def drag_handler(x, y):
    if state != Dragging:
        return

    t.ondrag(None)
    t.pendown()
    t.setheading(t.towards(x, y))
    t.goto(x, y)
    t.ondrag(drag_handler)

def onmove(self, fun, add=None):

    if fun is None:
        self.cv.unbind('<Motion>')
    else:
        def eventfun(event):
            fun(self.cv.canvasx(event.x) / self.xscale, -self.cv.canvasy(event.y) / self.yscale)
        self.cv.bind('<Motion>', eventfun, add)

onmove(screen, move_pen)
t.onclick(click_pen) # End of codes about control the turtle

state  = Moving

while True:
    
    ipt = str(input())

    if ipt == 'pencolor':
        colorsettings()
    elif ipt == 'penthickness':
        thicknesssettings()
    elif ipt == 'h':
        t.goto(0,0)
    elif ipt == 'c':
        t.clear()
    elif ipt == 'z':
        t.undo()
    elif ipt =='pu':
        t.penup()
    elif ipt =='pd':
        t.pendown()
    elif ipt == 'gg':
        print('Are you really want to close the program? [y/n]')
    elif ipt == 'n':
        continue
    elif ipt == 'y':
        break

这是我第一次来这里。也是我的第一个问题。如果我的问题对你很粗鲁或不友好，我想说声抱歉。

谢谢 ：）

标签： pythonpython-3.xturtle-graphicspython-turtle