class App_model(QObject):
'''
This class is the Model component of the MVC pattern.
'''
update_current_temp_signal = Signal(int)
def __init__(self, queue_size, initial_max_temp):
super(App_model, self).__init__()
#=======================================================================
# Initialize the temperature parameters (max temp, current temp, alarm,
# temperature queue) and connects everything.
#=======================================================================
#app = App_Logic(alarm, max_temp, current_temp, temp_queue)
self.alarm = Alarm()
self.max_temp = Max_temp()
self.current_temp = Current_temp()
self.temp_queue = Temperature_queue(queue_size = 20)
self.max_temp.set_temperature(int(initial_max_temp))
#=======================================================================
# Serial Port listener
# Initialize the HW listener... it runs in a different thread.
#=======================================================================
self.ser_comm = Serial_communication()
# When a new temperature value is read, update the view's current temp
self.ser_comm.value_read_signal.connect(self.update_current_temp)
'''
In order to be able to read the port, without making the UI freeze, the
port listener must run in a different thread.
'''
t = threading.Thread(target = self.ser_comm.read_from_port)
t.daemon = True # Not a main thread
t.start()
print "Serial Listener started!"
#===========================================================================
def compare_temperatures(self):
'''
This method compares the current temperature and the max temperature defined.
If the current is greater than the max temperature, an alarm will sound.
'''
if self.current_temp.get_temperature() >= self.max_temp.get_temperature():
self.alarm_turn_on()
#elif self.alarm.is_alarm():
#===========================================================================
def alarm_turn_off(self):
#Signal to stop alarm
self.alarm.set_alarm_status(False)
#===========================================================================
def alarm_turn_on(self):
#Signal to sound alarm
self.alarm.set_alarm_status(True)
#===========================================================================
def update_current_temp(self, new_value):
new_value = int(new_value)
new_value = self.adjust_temp_value(new_value)
print "Updating current temperature value:", new_value
self.update_current_temp_signal.emit(new_value)
self.current_temp.set_temperature(new_value)
self.temp_queue.put_in_queue(new_value)
self.compare_temperatures()
#===========================================================================
def adjust_temp_value(self, outdated_value):
updated_value = int(outdated_value / 102.4)
return updated_value
