Question

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，但是不能使框架内部扩展以适合画布。

我已经为此战斗了好几个小时，感觉好像很明显。

我希望NoteFrame内的标签可以扩展以填充框架，而NoteFrame可以扩展以填充画布。

以下是再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()

Answer 1

评论：动态解决方案

允许您的Label使用sticky='ew'来.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iid对象的项目Canvas(..., window=。
不需要参数width=200, height=200！

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

绑定到"<Configure>。

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

调整.frame_n_canvas 宽度的大小与.main_canvas 宽度同步。

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

如果将self.frame_n_canvas放在expand中，则小部件（这里是框架.create_window(...）失去了Canvas的功能。

.grid(...这没用，因为您稍后将与Frame相同的.create_window(...放置：

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。

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：

画布中的框架不会扩展为适合画布

1 个答案: