Button¶

The Button is a Label with associated actions that are triggered when the button is pressed (or released after a click/touch). To configure the button, the same properties (padding, font_size, etc) and sizing system are used as for the Label class:

button = Button(text='Hello world', font_size=14)

To attach a callback when the button is pressed (clicked/touched), use bind:

def callback(instance):
    print('The button <%s> is being pressed' % instance.text)

btn1 = Button(text='Hello world 1')
btn1.bind(on_press=callback)
btn2 = Button(text='Hello world 2')
btn2.bind(on_press=callback)

If you want to be notified every time the button state changes, you can bind to the Button.state property:

def callback(instance, value):
    print('My button <%s> state is <%s>' % (instance, value))
btn1 = Button(text='Hello world 1')
btn1.bind(state=callback)

Kv Example:

Button:
    text: 'press me'
    on_press: print("ouch! More gently please")
    on_release: print("ahhh")
    on_state:
        print("my current state is {}".format(self.state))

class kivy.uix.button.Button(**kwargs)¶

Bases: kivy.uix.behaviors.button.ButtonBehavior, kivy.uix.label.Label

Button class, see module documentation for more information.

Changed in version 1.8.0: The behavior / logic of the button has been moved to ButtonBehaviors.

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Button¶