python - Tkinter:如何在 Canvas 窗口中获取框架以扩展到 Canvas 的大小？

Question

所以我一直在使用 tkinter 中的 Canvas 小部件来创建一个充满标签的框架，它有一个滚动条。一切正常，除了框架仅扩展到放置在其中的标签的大小 - 我希望框架扩展到父 Canvas 的大小。

如果我对 Canvas 中的框架使用 pack(expand = True)(我已在下面的代码中注释掉)但滚动条不起作用，则可以轻松完成此操作。

这是适当的代码:

    ...
    self.canvas = Canvas(frame, bg = 'pink')
    self.canvas.pack(side = RIGHT, fill = BOTH, expand = True)

    self.mailbox_frame = Frame(self.canvas, bg = 'purple')

    self.canvas.create_window((0,0),window=self.mailbox_frame, anchor = NW)

    #self.mailbox_frame.pack(side = LEFT, fill = BOTH, expand = True)

    mail_scroll = Scrollbar(self.canvas, orient = "vertical",
        command = self.canvas.yview)
    mail_scroll.pack(side = RIGHT, fill = Y)

    self.canvas.config(yscrollcommand = mail_scroll.set)

    self.mailbox_frame.bind("<Configure>", self.OnFrameConfigure)


def OnFrameConfigure(self, event):
    self.canvas.configure(scrollregion=self.canvas.bbox("all"))

我还提供了一张带有彩色边框的图片，以便您了解我的意思。粉色区域是需要被mailbox_frame填充的 Canvas (可以看到右边的滚动条):

Answer 1

仅供将来引用，以防其他人需要知道:

        frame = Frame(self.bottom_frame)
        frame.pack(side = LEFT, fill = BOTH, expand = True, padx = 10, pady = 10)

        self.canvas = Canvas(frame, bg = 'pink')
        self.canvas.pack(side = RIGHT, fill = BOTH, expand = True)

        self.mailbox_frame = Frame(self.canvas, bg = 'purple')

        self.canvas_frame = self.canvas.create_window((0,0),
            window=self.mailbox_frame, anchor = NW)
        #self.mailbox_frame.pack(side = LEFT, fill = BOTH, expand = True)

        mail_scroll = Scrollbar(self.canvas, orient = "vertical", 
            command = self.canvas.yview)
        mail_scroll.pack(side = RIGHT, fill = Y)

        self.canvas.config(yscrollcommand = mail_scroll.set)

        self.mailbox_frame.bind("<Configure>", self.OnFrameConfigure)
        self.canvas.bind('<Configure>', self.FrameWidth)

    def FrameWidth(self, event):
        canvas_width = event.width
        self.canvas.itemconfig(self.canvas_frame, width = canvas_width)

    def OnFrameConfigure(self, event):
        self.canvas.configure(scrollregion=self.canvas.bbox("all"))