New Drawing methods for Graph Element. Demo program on drawing on Graph Elements

Demo_Graph_Drawing.py

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+import PySimpleGUI as sg
+
+layout = [
+           [sg.Graph(canvas_size=(400, 400), graph_bottom_left=(0,0), graph_top_right=(400, 400), background_color='red', key='graph')],
+           [sg.T('Change circle color to:'), sg.ReadFormButton('Red'), sg.ReadFormButton('Blue'), sg.ReadFormButton('Move')]
+           ]
+
+form = sg.FlexForm('Canvas test')
+form.Layout(layout)
+form.Finalize()
+
+graph = form.FindElement('graph')
+circle = graph.DrawCircle((75,75), 25, fill_color='black',line_color='white')
+point = graph.DrawPoint((75,75), 10, color='green')
+oval = graph.DrawOval((25,300), (100,280), fill_color='purple', line_color='purple' )
+rectangle = graph.DrawRectangle((25,300), (100,280), line_color='purple' )
+
+while True:
+    button, values = form.Read()
+    if button is None:
+        break
+    if button is 'Blue':
+        graph.TKCanvas.itemconfig(circle, fill = "Blue")
+    elif button is 'Red':
+        graph.TKCanvas.itemconfig(circle, fill = "Red")
+    elif button is 'Move':
+        graph.MoveFigure(point, 10,10)
+        graph.MoveFigure(circle, 10,10)
+        graph.MoveFigure(oval, 10,10)
+        graph.MoveFigure(rectangle, 10,10)