画布中的框架不会扩展以适应画布

我不知道为什么这行不通。我一定错过了一些东西，因为我可以使单个框架扩展以适合画布，但我无法使框架内的框架扩展以适合画布。

我已经为此奋斗了几个小时，我觉得这是显而易见的事情。

我期待里面的标签NoteFrame展开以填充框架，NoteFrame 展开以填充画布。

这是重现行为代码的最小代码：

import tkinter as tk


class NoteFrame(tk.Frame):
    def __init__(self, container):
        super().__init__(container)
        self.config(background='white')
        for i in range(20):
            tk.Label(self, text='test').grid(row=i, column=0, sticky='nsew')


class GCMain(tk.Tk):
    def __init__(self):
        super().__init__()
        self.columnconfigure(0, weight=1)
        self.rowconfigure(0, weight=1)

        self.main_canvas = tk.Canvas(self, background="bisque")
        self.main_canvas.columnconfigure(0, weight=1)
        self.main_canvas.rowconfigure(0, weight=1)
        self.frame_n_canvas = tk.Frame(self.main_canvas)
        self.frame_n_canvas.grid(row=0, column=0, sticky='nsew') # tried with and without this
        self.frame_n_canvas.columnconfigure(0, weight=1)
        self.main_canvas.config(scrollregion=self.main_canvas.bbox("all"), highlightthickness=0)
        scrollbar = tk.Scrollbar(self, orient='vertical')
        scrollbar.grid(row=0, column=1, sticky='nsw')
        scrollbar.config(command=self.main_canvas.yview)
        self.main_canvas.config(yscrollcommand=scrollbar.set)
        self.main_canvas.grid(row=0, column=0, sticky='nsew')
        self.main_canvas.create_window(0, 0, window=self.frame_n_canvas, anchor='nw')
        self.main_canvas.bind("<Configure>", self.update_scrollregion)

        nf = NoteFrame(self.frame_n_canvas)
        nf.grid(row=0, column=0, sticky='nsew') # tried with and without this

    def on_resize(self, event):
        w, h = event.width, event.height
        self.main_canvas.configure(width=w, height=h)
        self.frame_n_canvas(width=w, height=h) # tried with and without this

    def update_scrollregion(self, event):
        self.main_canvas.configure(scrollregion=self.main_canvas.bbox("all"))


if __name__ == '__main__':
    GCMain().mainloop()

Comment：动态解

1. 允许您的Label to be sticky='ew' use .grid_columnconfigure(0, weight=1).

   class NoteFrame(tk.Frame):
       def __init__(self, container):
           super().__init__(container)
           self.grid_columnconfigure(0, weight=1)
   

2. 您需要该物品iid of the Canvas(..., window= object.
   No范围width=200, height=200需要！

   self.main_canvas.fram_n_canvas_iid =\
           self.main_canvas.create_window(0, 0, window=self.frame_n_canvas, anchor='nw')
   

3. Bind to "<Configure>众所周知。

   self.main_canvas.bind("<Configure>", self.canvas_configure)
   

4. Resize .frame_n_canvas width同步于.main_canvas width.

   def canvas_configure(self, event):
       canvas = event.widget
       canvas.itemconfigure(canvas.fram_n_canvas_iid, width=canvas.winfo_width())
   

Question：画布中的框架不会扩展以适合画布

一个小部件，这里是你的框架self.frame_n_canvas，失去了能力expand，如果放置有.create_window(... in a Canvas.

This, .grid(...，没用，因为你稍后放置相同的Frame with .create_window(...:

self.frame_n_canvas.grid(row=0, column=0, sticky='nsew') # tried with and without this
...
self.main_canvas.create_window(0, 0, window=self.frame_n_canvas, anchor='nw')

给你的NoteFrame扩展的地方，使用参数width=200, height=200.

self.main_canvas.create_window(0, 0, window=self.frame_n_canvas, anchor='nw',
                               width=200, height=200)

为了让您的Label to be sticky='ew'， 你必须做.grid_columnconfigure(...:

class NoteFrame(tk.Frame):
    def __init__(self, container):
        super().__init__(container)
        self.grid_columnconfigure(0, weight=1)

Result: