Python - 根据按下按钮的时间将值传递回 main()

Question

如果这是一种严重损坏的做事方式，请原谅我，但总的来说，我对开发很陌生。

我正在尝试使用 tkinter 创建一个带有多个按钮的窗口，每个按钮上都有一个玩家的名字，使用一个从 main() 调用的类。

然后我希望能够使用稍后在应用程序中按下的按钮上的名称，因此我想将其传递回 main()。因此，如果我单击 Annie 按钮，我想稍后打开一个名为“Annie 选项”的新窗口，并且我假设需要将值“Annie”传递回主函数。

我的主要代码:

<imports appear here>
def main():

    players = ['Annie','Benny','Carrie','Donny']
    winHome = playerWindow(root,players)
    print("In main() : " + winHome.selected)

    root.mainloop()


if __name__ == "__main__":
    main()

我的类(class)代码:

<imports appear here>
root=Tk()

class playerWindow():

def selectPlayer(self,selname):

    self.selected = selname
    print("In class: " + self.selected)

def __init__(self, master, players=[]):

    colours = ['red','green','orange','white','yellow','blue']
    self.selected = ""

    r = 0
    for p in players:
        randcol = random.randint(0,len(colours))-1
        if colours[randcol] in ('blue','green'):
            fgcol='white'
        else:
            fgcol='black'
        playername = delplayer = p
         playername = Button(root, text=playername, bg=colours[randcol], fg=fgcol, width=15, command=lambda name = playername:self.selectPlayer(name)).grid(row=r,column=0)
        s = ttk.Separator(root, orient=VERTICAL)
        delplayer = Button(root, text='Del', bg='grey', fg='red', width=5, command=lambda name = delplayer: print("Delete Player %s" % name)).grid(row=r,column=1)
        r = r + 1

    Button(root, text="New Player", fg="black", command=lambda: print("New Player Functionality"), width=15).grid(row = len(players)+3,column=0)
    Button(root, text="QUIT", fg="red", command=root.destroy, width=15).grid(row = len(players)+3,column=1)

发生的情况是窗口被创建，main() 中的下一行被运行(我添加的打印语句)，它是空的，显然因为 main 正在继续。当我按下按钮时，sleectPlayer 函数被调用并起作用。

不知何故，我需要将值返回到 main() 以便使用该值继续执行下一个任务，但是我似乎无法正确地构建问题以获得我需要的答案。

任何帮助将不胜感激。

我使用的是Python 3.5.1

Answer 1

您已经在访问它。我个人不喜欢返回主函数，而是建议创建一个顶级类来链接回。这应该有助于让事情变得更好。

import tkinter as tk
from tkinter import ttk
import random

class PlayerWindow():
    def __init__(self, master, parent, players=[]):

        self._parent = parent

        colours = ['red','green','orange','white','yellow','blue']
        self.selected = ""

        r = 0
        for p in players:
            randcol = random.randint(0,len(colours))-1
            if colours[randcol] in ('blue','green'):
                fgcol='white'
            else:
                fgcol='black'
            playername = delplayer = p
            playername = tk.Button(master, text=playername, bg=colours[randcol], \
                        fg=fgcol, width=15, command=lambda name = \
                        playername:self.selectPlayer(name)).grid(row=r,column=0)

            s = ttk.Separator(master, orient=tk.VERTICAL)

            delplayer = tk.Button(master, text='Del', bg='grey', fg='red', \
                        width=5, command=lambda name = delplayer: \
                        print("Delete Player %s" % name)).grid(row=r,column=1)
            r = r + 1

        tk.Button(master, text="New Player", fg="black", command=lambda: \
                  print("New Player Functionality"), width=15).\
                  grid(row = len(players)+3,column=0)

        tk.Button(master, text="QUIT", fg="red", command=self._parent.close,
                  width=15).grid(row = len(players)+3,column=1)

    def selectPlayer(self, selname):
        self.selected = selname
        print("In class: " + self.selected)
        self._parent.hello() # call hello function of top-level, links back

class MyApplication(object):
    def __init__(self, master):
        self._master = master
        players = ['Annie','Benny','Carrie','Donny']
        self._player_window = PlayerWindow(master, self, players)
        print("In main() : " + self._player_window.selected)

    def hello(self):
        name = self._player_window.selected
        print("Hello, %s" % name)

    def close(self):
        # any other clean-up
        self._master.destroy()

def main():
    root = tk.Tk()
    app = MyApplication(root)
    root.mainloop()

if __name__ == "__main__":
    main()