在 Tkinter GUI 中显示 Matplotlib 音频图

Question

I was trying to insert a plot graph I get from an audio file into my tkinter root window however I'm not sure how to do it or which widget to use to display.

import matplotlib.pyplot as plt
import scipy.io.wavfile
from tkinter import *

root = Tk()
root.geometry("700x400")
root.title("SOUNDART")
root.resizable(False, False)
root.configure(bg="#1d1d1d")

rate, data = scipy.io.wavfile.read("example.wav")
plt.plot(data)

root.mainloop()

Answer 1

here is a complete example.

You must use canvas to embed the chart and above all use an object-oriented approach.

Audio file is in the same dir of the script.

#!/usr/bin/python3
import tkinter as tk
from tkinter import ttk
from tkinter import messagebox

import matplotlib.pyplot as plt
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg

try:
    from matplotlib.backends.backend_tkagg import NavigationToolbar2Tk as nav_tool
except:
    from matplotlib.backends.backend_tkagg import  NavigationToolbar2TkAgg as nav_tool
from matplotlib.figure import Figure
from matplotlib import gridspec

from scipy.io import wavfile
import numpy as np

class App(tk.Tk):
    def __init__(self):
        super().__init__()

        self.protocol("WM_DELETE_WINDOW", self.on_exit)
        #self.geometry("700x400")
        self.title("SOUNDART")
        self.init_ui()
        self.set_plot()
       
    def init_ui(self):

        f = ttk.Frame(padding = 8)
        fig = Figure()
        fig.subplots_adjust(bottom=0.10, right=0.96, left=0.08, top=0.95, wspace=0.10)
        self.plt = fig.add_subplot(111, facecolor=('xkcd:light grey'))
        canvas = FigureCanvasTkAgg(fig, f)
        toolbar = nav_tool(canvas, f)
        toolbar.update()
        canvas._tkcanvas.pack(fill=tk.BOTH, expand=1)

        f.pack(fill=tk.BOTH, expand=1)

    def set_plot(self):

        
        fig = plt.figure(figsize=(8, 8))

        my_file = 'example.wav'

        samplerate, data = wavfile.read(my_file)

        length = data.shape[0] / samplerate

        samplerate, data = wavfile.read(my_file)

        time = np.linspace(0., length, data.shape[0])

        self.plt.plot(time, data[:, 0], label="Left channel")

        self.plt.plot(time, data[:, 1], label="Right channel")

        self.plt.legend()

        self.plt.set_xlabel("Time [s]")

        self.plt.set_ylabel("Amplitude")

    def on_exit(self):
        if messagebox.askokcancel(self.title(), "Do you want to quit?", parent=self):
            self.destroy()               
    
if __name__ == '__main__':
    app = App()
    app.mainloop()