New Matplotlib Demo Programs for PySimpleGUIWeb

PySimpleGUIWeb/Demo Programs/Web_Matplotlib.py

@@ -142,25 +142,35 @@ def create_pyplot_scales():
                         wspace=0.35)
     return plt.gcf()
 
+# ----------------------------- The draw figure helpful function -----------------------------
 
 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
 
+# ----------------------------- The GUI Section -----------------------------
+
+def main():
     dictionary_of_figures = {'Axis Grid': create_axis_grid,
                              'Subplot 3D': create_subplot_3d,
                              'Scales': create_pyplot_scales,
                              'Basic Figure': create_figure}
 
-def main():
-
     layout = [
                 [sg.T('Matplotlib Example', font='Any 20')],
                 [sg.Listbox(dictionary_of_figures.keys(), size=(15, 5), key='-LB-'), sg.Image(key='-IMAGE-')],

PySimpleGUIWeb/Demo Programs/Web_Matplotlib_Browser.py

@@ -846,16 +846,15 @@ def draw_figure(fig, element):
     :param element: an Image Element
     :return: The figure canvas
     """
-    plt.close('all')
+
+    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
 
 

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():
 

PySimpleGUIWeb/Demo Programs/Web_Matplotlib_Simple_PyPlot.py

@@ -0,0 +1,45 @@
+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()