Clean up shutdown display

system-status.py

@@ -9,12 +9,13 @@ from time import sleep
 from unicornhatmini import UnicornHATMini, BUTTON_A
 
 POWER_BUTTON_HOLD_TIME_IN_SECONDS = 1
+DISPLAY_UPDATE_IN_SECONDS         = 2
 
-BLACK  = [00, 00, 00]
-RED    = [64, 00, 00]
-BLUE   = [00, 16, 32]
-ORANGE = [64, 16, 00]
-PINK   = [64, 00, 16]
+BLACK  = [0,  0,  0 ]
+RED    = [64, 0,  0 ]
+BLUE   = [0,  16, 32]
+ORANGE = [64, 16, 0 ]
+PINK   = [64, 0,  16]
 
 TEMP_COLOR    = RED
 CPU_COLOR     = BLUE
@@ -25,11 +26,13 @@ MAX_TEMP = 80
 
 
 class SystemStatus:
+
     def __init__(self, hat):
         self.hat = hat
         self.hat.set_brightness(0.1)
         self.hat.set_rotation(270)
         self.width, self.height = self.hat.get_shape()
+        self.isRunning = True
 
         self.tempStartColumn = 0
         self.tempEndColumn = int(self.width / 2)
@@ -40,23 +43,30 @@ class SystemStatus:
 
         self.clear()
 
-    def clear(self):
-        self.hat.set_all(0, 0, 0)
-        self.hat.show()
-
     def terminate(self):
+        self.stop()
+
         for _ in range(3):
-            self.clear()
             sleep(0.25)
-            self.hat.set_all(128, 0, 0)
+            self.hat.set_all(*RED)
             self.hat.show()
             sleep(0.25)
+            self.clear()
+
+    def stop(self):
+        self.isRunning = False
+        self.clear()
+
+    def clear(self):
+        self.hat.set_all(*BLACK)
+        self.hat.show()
 
     def display(self):
-        self.displayTemp()
-        self.displayCpu()
-        self.displayNetwork()
-        self.hat.show()
+        if self.isRunning:
+            self.displayTemp()
+            self.displayCpu()
+            self.displayNetwork()
+            self.hat.show()
 
     def displayTemp(self):
         self.displayField(
@@ -109,7 +119,7 @@ class SystemStatus:
 def cleanExit(systemStatus, button):
     def exit(signum, frame):
         button.close()
-        systemStatus.clear()
+        systemStatus.stop()
         sys.exit(0)
 
     return exit
@@ -132,7 +142,7 @@ def main():
 
     while True:
         systemStatus.display()
-        sleep(2)
+        sleep(DISPLAY_UPDATE_IN_SECONDS)
 
 
 if __name__ == '__main__':