New Demo - graph pings using canvas. Ping.py pure ping implementation

Demo_Ping_Line_Graph.py

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+import ping
+from threading import Thread
+import time
+import PySimpleGUI as sg
+
+# set coordinate system
+canvas_right = 300
+canvas_left = 0
+canvas_top = 0
+canvas_bottom = 300
+# define the coordinates you'll use for your graph
+x_right = 100
+x_left = 0
+y_bottom = 0
+y_top = 500
+
+# globale used to communicate with thread.. yea yea... it's working fine
+g_exit = False
+g_response_time = None
+
+def ping_thread(args):
+    global g_exit, g_response_time
+
+    while not g_exit:
+        g_response_time = ping.quiet_ping('google.com', timeout=1000)
+
+
+def convert_xy_to_canvas_xy(x_in,y_in):
+    scale_x = (canvas_right - canvas_left) / (x_right - x_left)
+    scale_y = (canvas_top - canvas_bottom) / (y_top - y_bottom)
+    new_x = canvas_left + scale_x * (x_in - x_left)
+    new_y = canvas_bottom + scale_y * (y_in - y_bottom)
+    return new_x, new_y
+
+
+
+# start ping measurement thread
+thread = Thread(target=ping_thread, args=(None,))
+thread.start()
+
+layout = [  [sg.T('Ping times to Google.com', font='Any 18')],
+           [sg.Canvas(size=(canvas_right, canvas_bottom), background_color='white', key='canvas')],
+           [sg.Quit()]
+           ]
+
+form = sg.FlexForm('Canvas test', grab_anywhere=True)
+form.Layout(layout)
+form.Finalize()
+
+canvas = form.FindElement('canvas').TKCanvas
+
+prev_response_time = None
+i=0
+prev_x, prev_y  = canvas_left, canvas_bottom
+while True:
+    time.sleep(.2)
+
+    button, values = form.ReadNonBlocking()
+    if button == 'Quit' or values is None:
+        break
+
+    if g_response_time is None or prev_response_time == g_response_time:
+        continue
+    new_x, new_y = convert_xy_to_canvas_xy(i, g_response_time[0])
+    prev_response_time = g_response_time
+    canvas.create_line(prev_x, prev_y, new_x, new_y, width=1, fill='black')
+    prev_x, prev_y = new_x, new_y
+    if i >= x_right:
+        i = 0
+        prev_x = prev_y = last_x = last_y = 0
+    else: i += 1
+
+# tell thread we're done. wait for thread to exit
+g_exit = True
+thread.join()
+
+
+exit(69)