Chuanshuoge: kivy 13 animation

Tuesday, July 13, 2021

#animation.py

from kivy.animation import Animation

from kivy.base import runTouchApp

from kivy.lang import Builder

from kivy.uix.widget import Widget

from kivy.properties import ListProperty

from kivy.core.window import Window

from random import random

Builder.load_string('''

<Root>:

AnimRect:

pos: 500, 300

<AnimRect>:

size: 200, 100

canvas:

Color:

rgba: 0, 1, 0, 1

Rectangle:

pos: self.pos

size: self.size

''')

class Root(Widget):

pass

class AnimRect(Widget):

def anim_to_random_pos(self):

Animation.cancel_all(self)

random_x = random() * (Window.width - self.width)

random_y = random() * (Window.height - self.height)

anim = Animation(x=random_x, y=random_y, duration=4, t='out_elastic')

anim.start(self)

def on_touch_down(self, touch):

if self.collide_point(*touch.pos):

self.anim_to_random_pos()

runTouchApp(Root())

reference:

Chuanshuoge