New Matplotlib Demo Programs for PySimpleGUIWeb

PySimpleGUIWeb/Demo Programs/Web_Matplotlib_Simple_PyPlot.py

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+import PySimpleGUIWeb as sg
+import numpy as np
+from matplotlib.backends.backend_tkagg import FigureCanvasAgg
+import matplotlib.pyplot as plt
+import io
+
+
+def draw_figure(fig, element):
+    """
+    Draws the previously created "figure" in the supplied Image Element
+
+    :param fig: a Matplotlib figure
+    :param element: an Image Element
+    :return: The figure canvas
+    """
+
+    plt.close('all')  # erases previously drawn plots
+    canv = FigureCanvasAgg(fig)
+    buf = io.BytesIO()
+    canv.print_figure(buf, format='png')
+    if buf is None:
+        return None
+    buf.seek(0)
+    element.update(data=buf.read())
+    return canv
+
+
+def main():
+    layout = [[sg.Text('Matplotlib Simple Plot', font='Any 20')],
+              [sg.Image(key='-IMAGE-')],
+              [sg.Button('Exit')]]
+
+    window = sg.Window('Matplotlib Example', layout, finalize=True)
+
+    fig = plt.figure()
+    x = np.arange(0, 5, 0.1)
+    y = np.sin(x)
+    plt.plot(x, y)
+    draw_figure(fig, window['-IMAGE-'])
+
+    window.read(close=True)
+
+
+if __name__ == "__main__":
+    main()