test-kivy-app/kivy_venv/share/kivy-examples/widgets/sequenced_images/main.py

import kivy
kivy.require('1.0.8')

from kivy.app import App
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.gridlayout import GridLayout
from uix.custom_button import AnimatedButton
from kivy.uix.scatter import Scatter
from kivy.properties import ObjectProperty


class gifScatter(Scatter):
    def __init__(self, **kwargs):
        super(gifScatter, self).__init__()


class zipScatter(Scatter):
    def __init__(self, **kwargs):
        super(zipScatter, self).__init__()


class jpgScatter(Scatter):
    def __init__(self, **kwargs):
        super(jpgScatter, self).__init__()


class Right_Frame(GridLayout):

    currentObj = ObjectProperty(None)

    def __init__(self, **kwargs):
        super(Right_Frame, self).__init__()

    def on_value(self, *l):
        if self.currentObj:
            if abs(l[1]) <= 0:
                self.currentObj.anim_delay = -1
                l[2].text = 'Animation speed: %f FPS' % 0
            else:
                self.currentObj.anim_delay = 1 / l[1]
                l[2].text = 'Animation speed: %f FPS' % (
                    1 / self.currentObj.anim_delay)
        else:
            l[0].max = 0
            l[2].text = 'No Image selected'


class mainclass(FloatLayout):

    currentObj = ObjectProperty(None)

    def __init__(self, **kwargs):
        super(mainclass, self).__init__()

        # initialize variables
        self.sign = .10

        # setup Layouts
        layout = GridLayout(size_hint=(1, 1), cols=3, rows=1)
        left_frame = GridLayout(size_hint=(.25, 1), cols=1)
        client_frame = FloatLayout(size_hint=(1, 1))
        self.right_frame = Right_Frame()

        # setup buttons in left frame
        but_load_gif = AnimatedButton(text='load gif', halign='center')
        but_load_zip_png = AnimatedButton(text='load zipped\n png/s',
                                          halign='center')
        but_load_zip_jpg = AnimatedButton(text='load zipped\n jpg/s',
                                          halign='center')
        but_animated = AnimatedButton(text='animated button\n'
            'made using\nSequenced Images\n press to animate',
            halign='center',
            background_normal='data/images/button_white.png',
            background_down='data/images/button_white_animated.zip')
        but_animated_normal = AnimatedButton(text='borderless\n'
            'animated button\npress to stop',
            halign='center',
            background_down='data/images/button_white.png',
            background_normal='data/images/button_white_animated.zip')
        but_animated_borderless = AnimatedButton(text='Borderless',
            background_normal='data/images/info.png',
            background_down='data/images/info.zip', halign='center')
        but_animated_bordered = AnimatedButton(text='With Border',
            background_normal='data/images/info.png',
            background_down='data/images/info.zip', halign='center')

        # Handle button press/release
        def load_images(*l):
            if l[0].text == 'load gif' or l[0].text == 'load gif\n from cache':
                l[0].text = 'load gif\n from cache'
                sctr = gifScatter()
            if (l[0].text == 'load zipped\n png/s' or
                    l[0].text == 'load zipped\n png/s from cache'):
                l[0].text = 'load zipped\n png/s from cache'
                sctr = zipScatter()
            if (l[0].text == 'load zipped\n jpg/s' or
                    l[0].text == 'load zipped\n jpg/s from cache'):
                l[0].text = 'load zipped\n jpg/s from cache'
                sctr = jpgScatter()

            client_frame.add_widget(sctr, 1)

            # position scatter
            sctr.pos = (240 + self.sign, 200 + self.sign)
            self.sign += 10
            if self.sign > 200:
                self.sign = 10
                sctr.pos = (300, 200 - self.sign)

        # bind function on on_release
        but_load_gif.bind(on_release=load_images)
        but_load_zip_png.bind(on_release=load_images)
        but_load_zip_jpg.bind(on_release=load_images)

        # add widgets to left frame
        left_frame.add_widget(but_load_gif)
        left_frame.add_widget(but_load_zip_png)
        left_frame.add_widget(but_load_zip_jpg)
        left_frame.add_widget(but_animated)
        left_frame.add_widget(but_animated_normal)
        left_frame.add_widget(but_animated_borderless)
        left_frame.add_widget(but_animated_bordered)

        # set/remove border for borderless widgets (16,16,16,16) by default
        but_animated_normal.border = \
            but_animated_borderless.border = (0, 0, 0, 0)

        # add widgets to the main layout
        layout.add_widget(left_frame)
        layout.add_widget(client_frame)
        layout.add_widget(self.right_frame)

        # add main layout to root
        self.add_widget(layout)

    def on_currentObj(self, *l):
        self.right_frame.currentObj = self.currentObj


class mainApp(App):

    def build(self):
        upl = mainclass()
        upl.size_hint = (1, 1)
        upl.pos_hint = {'top': 0, 'right': 1}
        return upl


if __name__ == '__main__':
    mainApp().run()