画布中的框架不会展开以适合画布

Question

我不知道这为什么行不通。我一定错过了什么，因为我可以使一个单一的框架扩大，以适应画布，但我不能使一个框架内的框架扩大，以适应画布。你知道吗

我已经为此奋斗了好几个小时，我觉得这是显而易见的。你知道吗

我希望NoteFrame内部的标签展开以填充框架，NoteFrame展开以填充画布。你知道吗

以下是复制行为代码的最低代码：

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()

Answer 1

Comment: Dynamic solution

1. 允许你的Label成为sticky='ew'使用.grid_columnconfigure(0, weight=1)。你知道吗

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

2. 您需要Canvas(..., window=对象的iid项。
   不需要参数width=200, height=200！你知道吗

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

3. 绑定到已知的"<Configure>。你知道吗

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

4. 调整.frame_n_canvas宽度与.main_canvas宽度同步。你知道吗

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

---

Question: Frame in canvas will not expand to fit canvas

一个小部件，这里是框架self.frame_n_canvas，如果与.create_window(...一起放在Canvas中，就失去了expand的功能。你知道吗

这个.grid(...是无用的，因为您稍后将相同的Frame与.create_window(...放在一起：

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')

要给您的NoteFrame扩展位置，请使用参数width=200, height=200。你知道吗

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

要使您的Label成为sticky='ew'，您必须执行.grid_columnconfigure(...：

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

结果：