使用tkin在python中更新画布上的多个椭圆坐标

Question

我正在开发一个图形用户界面，一次一个地连续地翻转硬币。 我有两个班掷硬币.py以及flipbell.py. 在

Cointoss类生成硬币的值更改，并使用flipbell对该过程进行动画处理。在

好像现在我有一个代码工作的动画一次一个硬币，但不是所有的硬币一次。在

当我说所有硬币时，这就是逻辑：首先一个硬币根据价值的变化而下降，下一个硬币下降，但是第一个硬币的价值也会相应地更新，以此类推。在

我需要帮助如何推进我目前所做的努力。我已经用for循环来模拟这个过程，我正在考虑使用递归方法来实现逻辑部分。在

任何对现有代码或想法的帮助都是很好的。在

在flipbell.py在

from tkinter import Tk, Canvas, Button, W, E
import random
from math import pi, sin, cos
from cointoss import *


class FlipBell(object):
    """
    GUI to simulate cointoss.
    """
    def __init__(self, wdw, dimension, increment, delay):
        """
        Determines the layout of the GUI.
        wdw : top level widget, the main window,
        dimension : determines the size of the canvas,
        increment : step size for a billiard move,
        delay : time between updates of canvas.
        """
        wdw.title('Coin flips and Bell Curve')
        self.dim = dimension # dimension of the canvas
        self.inc = increment
        self.dly = delay
        self.togo = False # state of animation
        # initial coordinates of the ball
        self.xpt = self.dim/2
        self.ypt = 0
        self.cnv = Canvas(wdw, width=self.dim,\
            height=self.dim, bg='white')
        self.cnv.grid(row=0, column=0, columnspan=2)
        self.bt0 = Button(wdw, text='start',\
            command=self.start)
        self.bt0.grid(row=1, column=0, sticky=W+E)
        self.bt1 = Button(wdw, text='stop',\
            command=self.stop)
        self.bt1.grid(row=1, column=1, sticky=W+E)

    def map2table(self, pnt):
        """
        Keeps the ball on the canvas table.
        """
        if pnt < 0:
            (quo, rest) = divmod(-pnt, self.dim)
        else:
            (quo, rest) = divmod(pnt, self.dim)
        return rest

    def placecoin(self, xpt, ypt):
        self.cnv.create_oval(xpt-1, ypt-1, xpt+1, ypt+1,\
            width=2, outline='red', fill='red', tags='coin')

    def drawball(self):
        """
        Draws the ball on the canvas.
        """
        xpt = self.map2table(self.xpt)
        ypt = self.map2table(self.ypt)
        self.cnv.delete('dot')
        self.cnv.create_oval(xpt-1, ypt-1, xpt+1, ypt+1,\
            width=1, outline='black', fill='red', tags='dot')

    def animate(self):
        """
        Performs the animation.
        """
        self.drawball()
        val = []
        for k in range(400):
            val1 = CoinToss.cointoss(3,k,self.dim//2)
            val.append(val1)

        points = {}
        for i in range(1,401):
            points[i] = 0
        for i in range(0,400):
            for j in range(0,400):
                (xpt, ypt) = (self.xpt, self.ypt)
                self.xpt = val[i][1][j]
                # print("x %d",self.xpt)
                self.ypt = ypt + 1
                # print("y %d",self.ypt)
                self.cnv.after(self.dly)
                self.drawball()
                self.cnv.update()

                #Puts the coin on top each other
                if self.ypt == 400:
                    if points[self.xpt]>=1:
                        self.placecoin(val[i][1][-1],400-points[self.xpt])
                    else:
                        self.placecoin(val[i][1][-1],400)
                    points[self.xpt]+=3
                    self.ypt = 0

    def start(self):
        """
        Starts the animation.
        """
        self.togo = True
        self.animate()

    def stop(self):
        """
        Stops the animation.
        """
        self.togo = False

def main():
    """
    Defines the dimensions of the canvas
    and launches the main event loop.
    """
    top = Tk()
    dimension = 400 # dimension of canvas
    increment = 10  # increment for coordinates
    delay = 1      # how much sleep before update
    num_flips = 3
    num_value = dimension//2
    FlipBell(top, dimension, increment, delay)
    top.mainloop()

if __name__ == "__main__":
    main()

在掷硬币.py在

^{pr2}$

Answer 1

在CoinToss中，您将函数和变量都命名为“flip”，这很令人困惑。另外，您使用“tags”关键字，它应该是“tag”。有不止一种方法来编码。下面的代码不是一个完整的解决方案，而是一个简单的示例，演示了如何使用CoinToss类来创建和移动单个球（不检查moveoffofcanvas）。FlipBell类将每个CoinToss实例存储在一个列表中，并在每次创建一个球时为每个类调用“flip”函数。您还可以在CoinToss类中使用“after”使flip函数反复调用自身。在

from tkinter import *
from random import randint

class FlipBell(object):
    """
    GUI to simulate cointoss.
    """
    def __init__(self, wdw, dimension, delay):
        """
        Determines the layout of the GUI.
        wdw : top level widget, the main window,
        dimension : determines the size of the canvas,
        increment : step size for a billiard move,
        delay : time between updates of canvas.
        """
        wdw.title('Coin flips and Bell Curve')
        self.cnv = Canvas(wdw, width=dimension,
                          height=dimension, bg='white')
        self.cnv.grid()

        self.ct_instances=[]
        self.colors=["blue", "red", "yellow", "gray", "green"]
        self.delay=delay
        self.offset=0
        self.create_next()

    def create_next(self):
        """ create one ball for each color in self.colors
            and call each existing ball's flip function to
            move it a random amount
        """
        x=5
        y=5
        incr=10*self.offset
        CT=CoinToss(self.cnv, x+incr, y+incr, self.colors[self.offset])
        ##save each CoinToss (ball) instance in a list
        self.ct_instances.append(CT)
        self.offset += 1

        ## call flip (move ball) for each instance
        for instance in self.ct_instances:
            instance.flip()

        if self.offset < len(self.colors):
            self.cnv.after(self.delay, self.create_next)

class CoinToss:
    def __init__(self, canvas, start_x, start_y, color):
        self.cnv=canvas
        self.cointoss(start_x, start_y, color)


    def cointoss(self, start_x, start_y, color):
        self.this_ball=self.cnv.create_oval(start_x-5, start_y-5, start_x+5, start_y+5,
                       outline='black', fill=color, tag="dot")

    def flip(self):
        """ move the ball created for this class instance by a random amount
        """
        rand_value = randint(10, 50)
        self.cnv.move(self.this_ball, rand_value, rand_value)

if __name__ == "__main__":
    top = Tk()
    dimension = 400 # dimension of canvas
    delay = 500     # how much sleep before update  > 1/2 second
    num_flips = 3
    FP=FlipBell(top, dimension, delay)
    top.mainloop()