Tkinter FigureCanvasTkAgg 滚动条是功能性的，但子图从滚动视图中被切断

Question

我使用 matplotlib 创建了一个包含可变数量子图的图形。我已将滚动条添加到包含此图的页面，以便用户能够滚动浏览各种图。经过多次尝试，滚动条现在可以使用了，但是，该图似乎在页面原始底部的位置被切断，留下一些子图被切断（见图）。

下面的示例代码应该模拟我运行遇到的问题。但是，下面的代码似乎有其自身的问题：它不会像在我的原始代码中那样拉伸图形以重现附加的图像。然而，它仍然应该给你一个想法 - 我希望图表能够超过常规帧大小，并且滚动条允许用户查看所有子图。

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()

过去几天我一直在寻找解决方案，但没有找到专门针对我的问题或我可以更改以适应的解决方案。

Image - Cut off subplots

我认为解决方案应该需要增加框架高度或类似的东西 - 我已经尝试过但没有成功。

我希望所有其他页面保持相同的 window 大小 - 我只想增加 PageTwo 的高度以用于滚动条。

Answer 1

此解决方案可能无法解决滚动所有轴的问题，但我发现了一个可能导致子图被过早切断的错误。我要做的更改是在 Scrollbar 对象的实例化中。传递 canvas 对象而不是小部件解决了我遇到的同样问题。

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)
    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)

Tkinter FigureCanvasTkAgg 滚动条是功能性的，但子图从滚动视图中被切断

Tkinter FigureCanvasTkAgg scrollbar is functional, but subplots are cut off from scrolling view

python

tkinter

matplotlib

scrollbar

frame