我无法设置顶级标题 [英] I can not set title of top level

问题描述

我想为TopLevel设置标题，但是TopLevel显示Root的标题.我认为我的下一个脚本与TkInter文档中的示例相对应，但结果却很糟糕.您能不能解释一下，为什么我在 class AppTop 中设置 master.title ='Top'不会为TopLevel设置新标题?

I want to set title for TopLevel, but TopLevel shows title of Root. I think that my next script corresponds with examples from TkInter documentation, but gives me bad result. Cann You explain me, why my setting master.title = 'Top' in class AppTop does not set new title for TopLevel?

import tkinter as tk

class AppTop(tk.Frame):

    def __init__(self, master):
        mon_h = 900
        mon_w = 1250

        master.title = 'Top'

        tk.Frame.__init__(self, master)
        master.minsize(height = 900, width = 600)

        fr_button = tk.Frame(master)
        fr_button.place(relx=0.01, rely=0.06)

        butArrowPlus = tk.Button(fr_button, text=">", height = 1, width = 20, command=self.Cmd)
        butArrowPlus.grid(column= 1, row= 1)
        return

    def Cmd(self):
        return

class Application(tk.Frame):
    def __init__(self, master):
        tk.Frame.__init__(self, master)

        frRoot = tk.Frame(master, width=700, height=400, bd=2)
        frRoot.place(relx=0.1, rely=0.1, anchor="nw")

        butIllumBall = tk.Button(frRoot, text= 'Light Ball', height = 1, width = 20, command=self.cmd_illuminated_ball)
        butIllumBall.grid(column= 0, row= 0, pady=10)

        master.minsize(height = 250, width = 300)
        master.title('Root')

    def cmd_illuminated_ball(self):

        top = tk.Toplevel()
        top.transient(self.master)        
        top.grab_set()                   
        app = AppTop(master = top)
        app.mainloop()
        return

wndRoot = tk.Tk()
appapp = Application(master=wndRoot)
appapp.mainloop()

推荐答案

您尝试使用以下方法设置顶级标题:

You try to set Toplevel title with:

master.title = 'Top'

但正确的语法是:

master.title('Top')

还有其他几件事情:对于顶级"窗口，您不需要额外的主循环.从代码中，您似乎认为Toplevel是一个新应用程序，并使用app = AppTop(master = top)对其进行了实例化.但这只是一个在appapp.mainloop()下运行的新窗口.

There are a couple of additional things: You do not need an additional mainloop for the Toplevel window. From the code it looks like you think that the Toplevel is a new application, instantiating it with app = AppTop(master = top). But it's just a new window which runs under the appapp.mainloop().

AppTop()从tk.Frame()继承，但是您从不使用它.相反，您可以将所有小部件直接放在顶层"(主)窗口中. Application()也是如此.

AppTop() inherits from tk.Frame() but you never use it. Instead you put all the widgets directly in the Toplevel (master) window. Same goes for Application() as well.

这篇关于我无法设置顶级标题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！