画布中的框架不会扩展为适合画布 [英] Frame in canvas will not expand to fit canvas

问题描述

我不确定为什么这行不通.我必须缺少一些东西，因为我可以使单个框架扩展以适合画布，但是不能在框架内部扩展以适合画布.

I am not sure why this will not work. I must be missing something because I can make a single frame expand to fit the canvas but I cannot make a frame inside a frame expand to fit the canvas.

我已经为此战斗了好几个小时，我觉得它很明显.

I have been fighting with this for hours and I feel like its something obvious.

我希望 NoteFrame 内部的标签可以扩展以填充框架，而NoteFrame可以扩展以填充画布.

I am expecting the label inside of the NoteFrame to expand to fill the frame and that NoteFrame expand to fill the canvas.

以下是再现行为代码的最小代码:

Here is the minimum code to reproduce the behavior code:

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()

推荐答案

评论:动态解决方案

1. 使用 .grid_columnconfigure(0，weight = 1)允许您的 Label 为 sticky ='ew'.

1. Allow your 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)

您需要 Canvas(...，window = 对象的 iid 项目.
否参数 width = 200，height = 200 是必需的！

You need the item iid of the Canvas(..., window= object.
No parameter width=200, height=200 are needed!

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

绑定到已知的< Configure> .

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

调整 .frame_n_canvas 宽度的大小，与 .main_canvas width 保持同步.

Resize .frame_n_canvas width in sync with .main_canvas width.

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

问题:画布中的框架不会扩展为适合画布

Question: Frame in canvas will not expand to fit canvas

小部件，即您的Frame self.frame_n_canvas ，如果放置在 .create_window(... 画布.

A widget, here your Frame self.frame_n_canvas, looses the ability to expand, if placed with .create_window(... in a Canvas.

这个 .grid(... )是没有用的，因为稍后您将相同的 Frame 与 .create_window(... :

This, .grid(..., is useless, as you later place the same 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')

要给您的 NoteFrame 扩展位置，请使用参数 width = 200，height = 200 .

To give your NoteFrame place to expand, use parameter width=200, height=200.

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

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

To allow your Label to be sticky='ew', you have to do .grid_columnconfigure(...:

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

结果:

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