PYTHON - KIVY 2

 

# Widget animation in kivy

# import kivy module 

import kivy 

  

# this restricts the kivy version i.e 

# below this kivy version you cannot 

# use the app or software 

kivy.require("1.9.1") 

  

# base Class of your App inherits from the App class. 

# app:always refers to the instance of your application 

from kivy.app import App 

# To work with Animation you must have to import it

from kivy.animation import Animation

# The Button is a Label with associated

# actions that are triggered when the button

# is pressed (or released after a click/touch). 

from kivy.uix.button import Button

# Create the App class

class TestApp(App):

   # Defining the function in which animations are added

   

    def animate(self, instance):

        # create an animation object. This object could be stored

        # and reused each call or reused across different widgets.

        # += is a sequential step, while &= is in parallel

        animation = Animation(pos =(100, 100), t ='out_bounce')

        animation += Animation(pos =(200, 100), t ='out_bounce')

        animation += Animation(size =(500, 500))

        animation += Animation(size =(100, 50))

        # apply the animation on the button, passed in the "instance" argument

        # Notice that default 'click' animation (changing the button

        # color while the mouse is down) is unchanged.

        animation.start(instance)

    def build(self):

        # create a button, and  attach animate() 

        # method as a on_press handler

        button = Button(size_hint =(None, None), text ='plop',

                        on_press = self.animate)

        return button

# run the App

if __name__ == '__main__':

    TestApp().run()