No more canaries

internal_filesystem/apps/com.example.app2/assets/app2.py

@@ -7,12 +7,9 @@ print("App2 running")
 # Quit flag
 should_continue = True
 
-canary = lv.obj(subwindow)
-canary.add_flag(lv.obj.FLAG.HIDDEN)
-
 def app2_thread():
 	count=0
-	while should_continue and canary.is_valid():
+	while should_continue and appscreen == lv.screen_active():
 		print(f"app2_thread: thread_id {_thread.get_ident()} - {count}")
 		count+=1
 		time.sleep(1)

internal_filesystem/apps/com.example.camtest/assets/camtest.py

@@ -30,11 +30,6 @@
 #i2c.writeto_mem(sensor_addr, reg_addr, bytes([reg_value]))
 
 
-
-#subwindow.clean()
-#canary = lv.obj(subwindow)
-#canary.add_flag(lv.obj.FLAG.HIDDEN)
-
 #width = 480
 #height = 320
 #width = 320

internal_filesystem/apps/com.example.launcher/assets/launcher.py

@@ -11,9 +11,6 @@
 
 import uos
 
-
-#myscreen = lv.screen_active()
-
 # Create a container for the grid
 cont = lv.obj(subwindow)
 cont.set_size(lv.pct(100), lv.pct(100))
@@ -85,7 +82,3 @@ for app_dir in [d for d in uos.listdir(apps_dir) if uos.stat(f"{apps_dir}/{d}")[
 end = time.ticks_ms()
 print(f"Displaying all icons took: {end-start}ms")
 
-#print("checking active...")
-#while myscreen == lv.screen_active():
-#    print("still active")
-#    time.sleep_ms(500)

internal_filesystem/apps/com.example.memtest/assets/memtest.py

@@ -40,7 +40,7 @@ def test_allocation(buffer_size, n):
     count = 0
     
     try:
-        while canary.is_valid():
+        while appscreen == lv.screen_active():
             # Measure time for allocation
             start_time = time.ticks_ms()
             # Allocate a new buffer

internal_filesystem/apps/com.example.wstest/assets/bitcoin_transactions.py

@@ -6,10 +6,6 @@ import urandom
 import uhashlib
 import time
 
-subwindow.clean()
-canary = lv.obj(subwindow)
-canary.add_flag(lv.obj.FLAG.HIDDEN)
-
 def compute_accept_key(key):
     GUID = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
     hash_obj = uhashlib.sha1(key + GUID)
@@ -197,7 +193,7 @@ try:
 
     print("Subscribing unconfirmed transactions...")
     ws_send_text(sock, ujson.dumps({"op": "unconfirmed_sub"}))
-    while canary.is_valid():
+    while appscreen == lv.screen_active():
         time.sleep(1)            
         data = ws_read_frame(sock) # Bug: when a giant response comes in, it cuts off after 5470 bytes and then the rest is read as a new (garbled) response
         if data: