New Matplotlib Demo Programs for PySimpleGUIWeb

PySimpleGUIWeb/Demo Programs/Web_Matplotlib_Simple.py

@@ -2,6 +2,7 @@ import PySimpleGUIWeb as sg
 import numpy as np
 from matplotlib.backends.backend_tkagg import FigureCanvasAgg
 import matplotlib.figure
+import matplotlib.pyplot as plt
 import io
 
 
@@ -15,15 +16,24 @@ def create_figure():
 
 
 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)
-    data = buf.read()
-    element.update(data=data)
+    element.update(data=buf.read())
+    return canv
+
 
 def main():