how to access main loop of kivy
Gaurav Bhoi
Elliot Garbus
I would suggest that you use Clock.schedule_interval() to run this code, and run it at the longest interval possible.
If you can be more descriptive about what you want to do, I might have a different suggestion… threading, multiprocessing..
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Gaurav Bhoi
import sys
from kivy.app import App
import threading
from kivy.uix.boxlayout import BoxLayout
class Box(BoxLayout):
pass
def func():
while True:
print('testing')
t1 = threading.Thread(target=func)
t1.start()
class Test(App):
def build(self):
return Box()
def on_stop(self):
sys.exit()
if __name__ == '__main__':
Test().run()
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Elliot Garbus
You want to be able to shutdown the thread at on_stop(). I created a class ThreadFunc that has an attribute run that can be used to stop the loop in func.
The method go creates and starts the thread. The method stop() stops the loop, and waits for the thread to shut down and join the main thread of execution.
This will allow a clean close.
import sys
from kivy.app import App
import threading
from kivy.uix.boxlayout import BoxLayout
class Box(BoxLayout):
pass
class ThreadFunc:
def __init__(self):
self.run = True
self.t1 = None
def func(self):
while self.run:
print('testing')
def go(self):
self.t1 = threading.Thread(target=self.func)
self.t1.start()
def stop(self):
self.run = False
self.t1.join()
class Test(App):
def build(self):
self.tf = ThreadFunc()
self.tf.go()
return Box()
def on_stop(self):
self.tf.stop()
if __name__ == '__main__':
Test().run()
From: Gaurav Bhoi
Sent: Monday, May 17, 2021 12:26 PM
To: kivy-...@googlegroups.com
Subject: Re: [kivy-users] how to access main loop of kivy
Hello Elliot, I m pasting a code down below where i tried threading. i m printing 'testing' in console. It works but while exiting app app crashes. please help
python code:
import sys
from kivy.app import App
import threading
from kivy.uix.boxlayout import BoxLayout
class Box(BoxLayout):
pass
def func():
while True:
print('testing')
t1 = threading.Thread(target=func)
t1.start()
class Test(App):
def build(self):
return Box()
def on_stop(self):
sys.exit()
if __name__ == '__main__':
Test().run()
On Mon, May 17, 2021 at 11:43 PM Elliot Garbus <elli...@cox.net> wrote:
I would suggest that you use Clock.schedule_interval() to run this code, and run it at the longest interval possible.
If you can be more descriptive about what you want to do, I might have a different suggestion… threading, multiprocessing..
From: Gaurav Bhoi
Sent: Monday, May 17, 2021 10:18 AM
To: Kivy users support
Subject: [kivy-users] how to access main loop of kivy
Hello guys, while asking this question I m assuming main loop is same loop like other loops nothing fancy. I want to add some piece of code to run it forever. How shall I do it . I m not adding more loops, I will make my app slow. please help thank you
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Elliot Garbus
Here is the code using Clock.schedule_interval.
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.clock import Clock
class Box(BoxLayout):
pass
def func(dt):
print('testing')
class Test(App):
def build(self):
Clock.schedule_interval(func, .1)
return Box()
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