CODEWITHSUNDEEP
pythonpython-3.xkivy
xaostheory
xaostheory

Reputation: 103

Immidiately update label text property

I wonder if I can immidiately update a property of a Label described in a kv layout file as so:

    BoxLayout:
    orientation: 'horizontal'
    Label:
        id: new_order
        font_size: 40
        text: ''

Thats because in my app I have set up two Clock schedule interval objects and I wont them to work simultaneously.

class MyApp(App):
   def on_start(self):
       Clock.schedule_interval(self.update_label, 1)
       Clock.schedule_interval(self.play_sounds, 1)

  def update_label(self):
     # does something
     self.root.ids.new_order.text="Updated Text"
     # does something more

  def play_sounds(self):
     for i in range(10):
         sound.play()
         sleep(2)

But... label is always updated after the play_sounds() method exits. So is there a way to immidiately update the displayed label text just after setting it to "Updated Text" inside update_label() method?

Upvotes: 0

Views: 64

Answers (3)

xaostheory
xaostheory

Reputation: 103

What I have done and solved my problem, was to spawn a thread to handle sound-playing in parallel with main, after the helpful @john-anderson answer. So:

import Threading
def play_sounds():
  for i in range(10):
      sound.play()
      sleep(2)

class MyApp(App):
   def on_start(self):
       Clock.schedule_interval(self.update_label, 1)

  def update_label(self):
     # if condition:
         self.root.ids.new_order.text="Updated Text"
         t = threading.Thread(target=play_sounds)
         t.start()

Upvotes: 0

John Anderson
John Anderson

Reputation: 38822

Your play_sounds() method will take at least 20 seconds to run (because of the sleep) and you are trying to run that method every second. Sounds like a bad idea. Also, the sleep freezes your entire GUI, since it is run on the main thread. Try changing play_sounds() to:

def play_sounds(self, dt):
    sound = SoundLoader.load('some_sound_file')
    sound.play()

Upvotes: 1

Darnell Baird
Darnell Baird

Reputation: 243

You could nest the Clock.schedule_interval. Within the function after the main logic body of the function, you could put in another Clock.schedule_interval with the next function to call. I recommend in the inner function that you use a clock lambda function to create a one liner.

Upvotes: 0

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