PySimpleGUI Matplotlib集成

当从Python shell中使用Matplotlib时，绘图被显示在一个默认的窗口中。 backend_tkagg 模块对于在Tkinter中嵌入绘图非常有用。

PySimpleGUI中的Canvas元素有TKCanvas方法，可以返回原始TKinter的Canvas对象。它被交给backend_tkagg模块中的 FigureCanvasTkAgg() 函数来绘制图形。

首先，我们需要使用 Figure() 类来创建图形对象，并为其绘制图形。我们将绘制一个显示正弦波的简单图。

fig = matplotlib.figure.Figure(figsize=(5, 4), dpi=100)
t = np.arange(0, 3, .01)
fig.add_subplot(111).plot(t, 2 * np.sin(2 * np.pi * t))

定义一个函数，在画布上绘制matplotlib图形对象

def draw_figure(canvas, figure):
   figure_canvas_agg = FigureCanvasTkAgg(figure, canvas)
   figure_canvas_agg.draw()
   figure_canvas_agg.get_tk_widget().pack(side='top', fill='both', expand=1)
   return figure_canvas_agg

通过调用PySimpleGUI.Canvas对象的TkCanvas属性获得Canvas。

layout = [
   [psg.Text('Plot test')],
   [psg.Canvas(key='-CANVAS-')],
   [psg.Button('Ok')]
]

通过调用上述函数绘制图形。将Canvas对象和fifure对象传给它。

fig_canvas_agg = draw_figure(window['-CANVAS-'].TKCanvas, fig)

例子：绘制一个正弦波线图

以下是完整的代码-

import matplotlib.pyplot as plt
import numpy as np
from matplotlib.backends.backend_tkagg import
FigureCanvasTkAgg
import PySimpleGUI as sg
import matplotlib
matplotlib.use('TkAgg')
fig = matplotlib.figure.Figure(figsize=(5, 4), dpi=100)
t = np.arange(0, 3, .01)
fig.add_subplot(111).plot(t, 2 * np.sin(2 * np.pi * t))
def draw_figure(canvas, figure):
   tkcanvas = FigureCanvasTkAgg(figure, canvas)
   tkcanvas.draw()
   tkcanvas.get_tk_widget().pack(side='top', fill='both', expand=1)
   return tkcanvas
layout = [[sg.Text('Plot test')],
   [sg.Canvas(key='-CANVAS-')],
   [sg.Button('Ok')]]
window = sg.Window('Matplotlib In PySimpleGUI', layout, size=(715, 500), finalize=True, element_justification='center', font='Helvetica 18')

# add the plot to the window
tkcanvas = draw_figure(window['-CANVAS-'].TKCanvas, fig)
event, values = window.read()
window.close()