Merge pull request #2227 from PySimpleGUI/Dev-latest

New demo!  Using Matplotlib with PySimpleGUIQt (2 window solution)

PySimpleGUIQt/Demo Programs/Qt_Demo_Matplotlib_Two_Windows.py

@@ -0,0 +1,29 @@
+from matplotlib import use
+# import PySimpleGUI as sg          # Same program can be used with tkinter port
+import PySimpleGUIQt as sg; use('qt5agg')
+import matplotlib.pyplot as plt
+
+"""
+    Simultaneous PySimpleGUI Window AND a Matplotlib Interactive Window
+    A number of people have requested the ability to run a normal PySimpleGUI window that
+    launches a MatplotLib window that is interactive with the usual Matplotlib controls.
+    It turns out to be a rather simple thing to do.  The secret is to add parameter block=False to plt.show()
+"""
+
+def draw_plot():
+    plt.plot([0.1, 0.2, 0.5, 0.7])
+    plt.show(block=False)
+
+layout = [[sg.Button('Plot'), sg.Cancel(), sg.Button('Popup')]]
+
+window = sg.Window('Have some Matplotlib....', layout)
+
+while True:
+    event, values = window.read()
+    if event in (None, 'Cancel'):
+        break
+    elif event == 'Plot':
+        draw_plot()
+    elif event == 'Popup':
+        sg.popup('Yes, your application is still running')
+window.close()