Better closing of app

main.py

@@ -6,6 +6,11 @@ import threading
 import json
 from bottle import route, run
 import time
+import sys
+import signal
+
+running = True
+
 if config.UseGui:
     import pygame
 
@@ -18,13 +23,14 @@ if config.UseGui:
             self.data = data
 
         def run(self):
+            global running
             sf = config.GuiScaleFactor
             screen = pygame.display.set_mode((sf*config.ScreenX, sf*config.ScreenY))
             pygame.display.set_caption("Pixelserver - GUI Vis")
-            while True:
+            while running:
                 for event in pygame.event.get():
                     if event.type == pygame.QUIT:
-                        sys.exit(0)
+                        running = False
                 screen.fill((0, 255, 0))
                 for x in range(config.ScreenX):
                     for y in range(config.ScreenY):
@@ -49,7 +55,7 @@ class SerialWriter(threading.Thread):
     def run(self):
         should_connect = True
         ser = None
-        while True:
+        while running:
             try:
                 if should_connect:
                     ser = serial.Serial(config.Serial)
@@ -72,7 +78,7 @@ class WatchDog(threading.Thread):
         self.check = check
         self.action = action
     def run(self):
-        while True:
+        while running:
             if self.check():
                 self.action()
             time.sleep(1)
@@ -119,7 +125,7 @@ class AppRunner(threading.Thread):
         self.app = subprocess.Popen(args, stdout=subprocess.PIPE, close_fds=True)
 
     def run(self):
-        while True:
+        while running:
             with self.lock:
                 if self.app == None or self.app.poll() != None:
                     self.requestedApp = 0   
@@ -137,7 +143,10 @@ class AppRunner(threading.Thread):
                     self.gui.setData(data)
             except:
                 pass
-
+        self.watchdog.join()
+        self.serial.join()
+        if config.UseGui:
+            self.gui.join()
 
 runner = AppRunner()
 runner.start()
@@ -172,4 +181,7 @@ def  apps_running():
     i = runner.currentApp
     return config.Apps[i]["name"]
 
+
 run(host="localhost", port=8000)
+running = False
+runner.join()