how to get label to refresh?

[rmann0581]

I created a simple counter. There is a button to increase the counter, a button to decrease the counter and a buton to reset the counter to 0. I have a label that shows the curent count; However, the count is not updated when I push the buttons. How do I get the label to update? The code is below:

import toga
count=0
def increase_count(widget):
   global count
   global input_count
   count=count+1
def decrease_count(widget):
   global count
   count=count-1
def reset_count(widget):
   global count
   count=0
def build(app):
    box = toga.Box()

    increase_button = toga.Button('increase count', on_press=increase_count)
    increase_button.style.padding = 50
    increase_button.style.flex = 1
    box.add(increase_button)
#end of first button
    decrease_button = toga.Button('decrease count', on_press=decrease_count)
    decrease_button.style.padding = 50
    decrease_button.style.flex = 1
    box.add(decrease_button)
#end of second button
    reset_button = toga.Button('reset count', on_press=reset_count)
    reset_button.style.padding = 50
    reset_button.style.flex = 1
    box.add(reset_button)
    input_count=toga.Label(text=count)
    box.add(input_count)
    return box


def main():
    return toga.App(
        'Simple Counter',
        'org.beeware.helloworld',
        author='Tiberius Yak',
        description="A testing app",
        version=0.01,
        home_page="https://beeware.org",
        startup=build
    )


if __name__ == '__main__':
    main().main_loop()

[freakboy3742]

So - you've created a counter, and you've created a button - but you've done nothing to connect the counter to the button.

When you pass count to the label, it's not a "live" updating value - it's a once off "set the label to this text". If you want the label to be updated, you need to modify the button handlers to update the value of the label (with input_count.text = count) every time the value changes.

[rmann0581]

thank you. That was all I needed to do.

…

Sent from my iPhone

On Feb 20, 2022, at 5:39 PM, Russell Keith-Magee ***@***.***> wrote:  So - you've created a counter, and you've created a button - but you've done nothing to connect the counter to the button. When you pass count to the label, it's not a "live" updating value - it's a once off "set the label to this text". If you want the label to be updated, you need to modify the button handlers to update the value of the label (with input_count.text = count) every time the value changes. — Reply to this email directly, view it on GitHub, or unsubscribe. Triage notifications on the go with GitHub Mobile for iOS or Android. You are receiving this because you authored the thread.