gistfile1.py

__author__ = 'Cheaterman'

from kivy.app import App
from kivy.uix.screenmanager import ScreenManager
from kivy.lang import Builder



kv = """
<TestWidget>:
    Screen:
        name: 'Test1'

        canvas:
            Color:
                rgb: 1, 1, 1
            Rectangle:
                pos: self.pos
                size: self.size

        Button:
            text: 'Switch screen'

            size_hint: 1 / 3., 1 / 5.
            center: self.parent.center

            on_release:
                self.parent.parent.transition.direction = 'left'
                self.parent.parent.current = 'Test2'

    Screen:
        name: 'Test2'

        canvas:
            Color:
                rgb: .5, .5, .5
            Rectangle:
                pos: self.pos
                size: self.size

        Button:
            text: 'Switch screen'

            size_hint: 1 / 3., 1 / 5.
            center: self.parent.center

            on_release:
                self.parent.parent.transition.direction = 'right'
                self.parent.parent.current = 'Test1'
"""

Builder.load_string(kv)

class TestWidget(ScreenManager):
    pass

class TestApp(App):
    def build(self):
        return TestWidget()



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