Python tkinter 框架不会使用网格填充父容器

Question

我有点被这个问题困住了。我正在尝试构建一个包含多个页面的应用程序。为此，我创建了一个主框架，然后每时每刻都提升了我需要的框架。这是我写到现在的代码：

class Main(tk.Tk):

def __init__(self, *args, **kwargs):

    tk.Tk.__init__(self, *args, **kwargs)

    main_container = tk.Frame(self)
    main_container.grid(sticky = "nsew")
    main_container.grid_rowconfigure(0, weight = 1)
    main_container.grid_columnconfigure(0, weight = 1)

    menu_bar = tk.Menu(main_container)
    file_menu = tk.Menu(menu_bar, tearoff = 0) 
    file_menu.add_command(label = "Save settings", command = lambda: popupmsg("Not supported yet!"))
    file_menu.add_separator()
    file_menu.add_command(label = "Exit", command = quit)
    menu_bar.add_cascade(label = "File", menu = file_menu)

    tk.Tk.config(self, menu = menu_bar)

    self.frames = {}

    for fr in (MainPage, GraphsPage, Page2):

        frame = fr(main_container, self)

        self.frames[fr] = frame

        frame.grid(row = 0, column = 0, sticky = "nsew")

    self.show_frame(MainPage)


def show_frame(self, pointer):

    frame = self.frames[pointer]
    frame.tkraise()

然后，MainPage，例如：

class MainPage(tk.Frame):

def __init__(self, parent, controller):

    tk.Frame.__init__(self, parent)

    #Tried this but it doesn't work
    #self.columnconfigure(0, weight = 1)
    #self.rowconfigure(0, weight = 1)
    #self.rowconfigure(1, weight = 1)
    #self.rowconfigure(2, weight = 1)
    #self.rowconfigure(3, weight = 1)

    label = tk.Label(self, text = "Main Page", font = LARGE_FONT)
    label.grid(row = 0, padx = 10, pady = 10)

    button1 = ttk.Button(self, text = "Graphs", command = lambda: controller.show_frame(GraphsPage))
    button1.grid(row = 1, sticky = 'nswe')

    button2 = ttk.Button(self, text = "Page 2", command = lambda: controller.show_frame(Page2))
    button2.grid(row = 2, sticky = 'nswe')

    button3 = ttk.Button(self, text = "Exit", command = quit)
    button3.grid(row = 3, sticky = 'nswe')

（为简单起见，我没有显示 GraphsPage 和 Page 2）。最后，我将程序运行为：

app = Main()
app.geometry("1280x720")
app.mainloop()

而且我能够使按钮适合整个列，但这些列不适合“1280x720”主容器。我错过了什么？在此先感谢您的时间。

Answer 1

您在MainPage构造函数中有正确的想法，但随后将其注释掉，但您错过了在顶级Tk对象中的操作：

import tkinter as tk
from tkinter import ttk

LARGE_FONT = ("ariel", 20) # dont know what you had here

class Main(tk.Tk):
    def __init__(self, *args, **kwargs):

        tk.Tk.__init__(self, *args, **kwargs)
        self.grid_rowconfigure(0, weight=1) # this needed to be added
        self.grid_columnconfigure(0, weight=1) # as did this

        main_container = tk.Frame(self)
        main_container.grid(column=0, row=0, sticky = "nsew")
        main_container.grid_rowconfigure(0, weight = 1)
        main_container.grid_columnconfigure(0, weight = 1)

        menu_bar = tk.Menu(main_container)
        file_menu = tk.Menu(menu_bar, tearoff = 0) 
        file_menu.add_command(label = "Save settings", command = lambda: popupmsg("Not supported yet!"))
        file_menu.add_separator()
        file_menu.add_command(label = "Exit", command = quit)
        menu_bar.add_cascade(label = "File", menu = file_menu)

        tk.Tk.config(self, menu = menu_bar)

        self.frames = {}

        for fr in (MainPage,):
            frame = fr(main_container, self)
            self.frames[fr] = frame
            frame.grid(row = 0, column = 0, sticky = "nsew")
        self.show_frame(MainPage)

    def show_frame(self, pointer):
        frame = self.frames[pointer]
        frame.tkraise()

class MainPage(tk.Frame):
    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)

        # uncommented these lines
        self.columnconfigure(0, weight = 1)
        self.rowconfigure(0, weight = 1)
        self.rowconfigure(1, weight = 1)
        self.rowconfigure(2, weight = 1)
        self.rowconfigure(3, weight = 1)

        label = tk.Label(self, text = "Main Page", font = LARGE_FONT)
        label.grid(row = 0, padx = 10, pady = 10)

        button1 = ttk.Button(self, text = "Graphs", command = lambda: controller.show_frame(GraphsPage))
        button1.grid(row = 1, sticky = 'nswe')

        button2 = ttk.Button(self, text = "Page 2", command = lambda: controller.show_frame(Page2))
        button2.grid(row = 2, sticky = 'nswe')

        button3 = ttk.Button(self, text = "Exit", command = quit)
        button3.grid(row = 3, sticky = 'nswe')

app = Main()
app.geometry("1280x720")
app.mainloop()