Tkinter FigureCanvasTkAgg滚动条是功能性的，但是子窗口与滚动vi是断开的

Question

我用matplotlib创建了一个具有可变数量子图的图形。我在包含这个图的页面上添加了一个滚动条，这样用户就可以滚动浏览各种图了。滚动条，通过多次尝试，现在是功能性的，然而，图似乎切断了原来页面底部的位置，留下一些子窗口被切断（见图）。你知道吗

下面的示例代码应该模拟我遇到的问题。然而，下面的代码似乎有自己的问题：它不会像在我的原始代码中那样拉伸图形来复制所附的图像。不过，它仍然应该给你一个想法-我希望图形延伸超过常规帧大小，滚动条允许用户查看所有子图。你知道吗

import tkinter as tk
from tkinter import *
import matplotlib
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
from matplotlib.figure import Figure



f = Figure(figsize = (1,1), dpi = 100)

a = []

for i in range(0,20):

    a.append(f.add_subplot(20,1,i+1))

f.set_figheight(60)
f.set_figwidth(14)

for i in range(0,20):

    a[i].plot([1,2,3,4,5],[1,2,3,4,5])
    a[i].set_title('Graph ' + str(i+1))



class App(tk.Tk):

    def __init__(self, *args, **kwargs):

        tk.Tk.__init__(self, *args, **kwargs)
        container = tk.Frame(self)

        container.pack(side = "top", fill = "both", expand = True)
        container.grid_columnconfigure(0,weight=1)
        container.grid_rowconfigure(0,weight = 1)

        self.minsize(620,400)

        self.geometry("{0}x{1}+0+0".format(self.winfo_screenwidth(), self.winfo_screenheight()))

        self.update_idletasks()


        self.frames = {}

        for F in (StartPage, PageTwo):

            frame = F(container, self)

            self.frames[F] = frame

            frame.grid(row = 0, column = 0, sticky = 'nsew')

        self.show_frame(StartPage)

    def show_frame(self, cont):

        frame = self.frames[cont]
        frame.tkraise()


class StartPage(tk.Frame):

    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)

        button_p1 = tk.Button(self, text = "PageTwo →",
                              command = lambda: controller.show_frame(PageTwo))
        button_p1.pack(side = TOP, fill = X)

        label = tk.Label(self, text = "Start Page")
        label.pack(fill = X, expand = True)


class PageTwo(tk.Frame):

    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)


        button_1 = tk.Button(self, text = "← Start Page",
                         command = lambda: controller.show_frame(StartPage))
        button_1.pack(side = LEFT, anchor = N)

        label_p1 = tk.Label(self, text = "PageTwo")
        label_p1.pack()

        canvas = FigureCanvasTkAgg(f,self)
        canvas.draw()
        canvas.get_tk_widget().pack(side=tk.BOTTOM,fill=tk.X,expand = True)

        scroll=Scrollbar(canvas.get_tk_widget())
        scroll.config(command=canvas.get_tk_widget().yview)
        scroll.pack(side = RIGHT, fill=Y)
        canvas.get_tk_widget().pack(side = LEFT, expand = YES, fill = BOTH)
        canvas.get_tk_widget().config(yscrollcommand=scroll.set)


        canvas.get_tk_widget().config(scrollregion=(0,0,1000,10000),confine=True)

app = App()

app.mainloop()

在过去的几天里，我一直在寻找一个解决方案，但没有找到一个专门针对我的问题或一个我可以改变，以适应。你知道吗

Image - Cut off subplots

我假设解决方案应该包括增加框架高度或类似的东西-我尝试这样做没有运气。你知道吗

我希望保持所有其他页面的窗口大小相同-我只想增加第二页的高度为滚动条的目的。你知道吗