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Kivy.uix.screenmanager

The screen manager is a widget dedicated to managing multiple screens for your application. The default ScreenManager displays only one Screen at a time and uses a TransitionBase to switch from one Screen to another.

Multiple transitions are supported based on changing the screen coordinates / scale or even performing fancy animation using custom shaders.

Basic Usage

Let’s construct a Screen Manager with 4 named screens. When you are creating a screen, you absolutely need to give a name to it: 

from kivy.uix.screenmanager import ScreenManager, Screen

# Create the manager
sm = ScreenManager()

# Add few screens
for i in range(4):
    screen = Screen(name='Title %d' % i)
    sm.add_widget(screen)

# By default, the first screen added into the ScreenManager will be
# displayed. You can then change to another screen.

# Let's display the screen named 'Title 2'
# A transition will automatically be used.
sm.current = 'Title 2'

Example 2

Here is an example with a ‘Menu Screen’ and a ‘Settings Screen’: 

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

# Create both screens. Please note the root.manager.current: this is how
# you can control the ScreenManager from kv. Each screen has by default a
# property manager that gives you the instance of the ScreenManager used.
Builder.load_string("""
<MenuScreen>:
    BoxLayout:
        Button:
            text: 'Goto settings'
            on_press: root.manager.current = 'settings'
        Button:
            text: 'Quit'

<SettingsScreen>:
    BoxLayout:
        Button:
            text: 'My settings button'
        Button:
            text: 'Back to menu'
            on_press: root.manager.current = 'menu'
""")

# Declare both screens
class MenuScreen(Screen):
    pass

class SettingsScreen(Screen):
    pass

class TestApp(App):

    def build(self):
        # Create the screen manager
        sm = ScreenManager()
        sm.add_widget(MenuScreen(name='menu'))
        sm.add_widget(SettingsScreen(name='settings'))

        return sm

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

See also

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