Tkinter 在画布小部件中嵌入绘图，滚动条不起作用

Question

我一直在努力将滚动条小部件链接到嵌入在画布小部件中的图形。 我设法显示了滚动条，但它没有链接到画布内的图形。

我附在我的简化代码下面。

import tkinter as tk
import matplotlib
matplotlib.use('TkAgg')
import matplotlib.pyplot as plt
from matplotlib.backends.backend_tkagg import (FigureCanvasTkAgg)

class AKP():

   def __init__(self, the_window):

       self.the_window = the_window
       self.the_window.geometry("800x700")
       self.the_window.resizable(False, False)

       self.Main_Frame = tk.Frame(self.the_window)
       self.Main_Frame.grid()

       self.my_canvas = tk.Canvas(self.Main_Frame, width=1000, height=1000, scrollregion=(0,0, 600,1200), relief="sunk")
       self.my_canvas.grid(row=1, column=0)
       self.scrollY = tk.Scrollbar(self.Main_Frame, orient=tk.VERTICAL,
                                 command=self.my_canvas.yview)
       self.scrollY.grid(row=1, column=1, sticky=tk.NS)
       self.my_canvas["yscrollcommand"] = self.scrollY.set

       self.display_output()

    def display_output(self):

        self.fig = plt.Figure(figsize=(7, 9), dpi=100, facecolor="#D6EAF8")
        self.ax = self.fig.add_subplot(111)

        self.canvas = FigureCanvasTkAgg(self.fig, master=self.my_canvas)
        self.canvas.get_tk_widget().grid(row=0, column=0)

        var_text_1 = "Hello World"

        self.ax.text(-0.1, 1.03, var_text_1, fontsize=12, fontweight="roman", fontfamily="fantasy")

if __name__ == "__main__":
    my_window = tk.Tk()
    application = AKP(my_window)
    my_window.mainloop()

Answer 1

这是我用来在 Tkinter 中添加滚动条的方法

1. 制作画布

canvas = tk.Canvas(app)
canvas.pack(side="left", fill="both", expand=True)

2. 然后制作一个 Frame 放入 Canvas*

# Create a frame to put in the canvas
main_frame = tk.Frame(canvas)
canvas.create_window((4,4), window=main_frame, anchor="nw")  # This code fits the frame into the canvas window

*您不需要制作框架，如果您愿意，您可以将小部件直接放入画布中。

3. 最后，创建滚动条

# Scrollbar
def onFrameConfigure(canvas):
    # Reset the scroll region to encompass the inner frame
    canvas.configure(scrollregion=canvas.bbox("all"))

scrollbar = tk.Scrollbar(app, orient="vertical", command=canvas.yview)
canvas.configure(yscrollcommand=scrollbar.set)
scrollbar.pack(side="right", fill="y")  # Displays scrollbar
main_frame.bind("<Configure>", lambda event, canvas=canvas: onFrameConfigure(canvas))

现在，您放入main_frame所有内容都将适合滚动条。