Kivy ContextualActionView example

ContextualActionView.py

from kivy.base import runTouchApp
from kivy.uix.floatlayout import FloatLayout
from kivy.factory import Factory
from kivy.lang import Builder
from kivy.uix.actionbar import ContextualActionView

if __name__ == "__main__":

    # XXX clean the first registration done from '__main__' here.
    # otherwise kivy.uix.actionbar.ActionPrevious != __main__.ActionPrevious
    # Factory.unregister('ActionPrevious')

    Builder.load_string('''

<Project>:
    id: contextual
    ActionPrevious:
        title: "Project"
        width: 100
        with_previous: True
    ActionOverflow:
    ActionButton:
        text: 'Run...'
        on_release: root.show_contextual_options()
    ActionButton:
        text: 'Save'
    ActionButton:
        text: 'Export'

<RunOptions>:
    id: contextual
    ActionPrevious:
        title: "Run"
        width: 100
        with_previous: True
    ActionOverflow:
    ActionButton:
        text: 'Run'
        on_release: print('run')
    ActionButton:
        text: 'Stop'
    ActionButton:
        text: 'Restart'

<MainWindow>:
    action_bar: action_bar
    ActionBar:
        id: action_bar
        pos_hint: {'top':1}
        ActionView:
            use_separator: True
            ActionPrevious:
                title: 'Action Bar'
                with_previous: False
            ActionOverflow:
            ActionButton:
                text: 'Project'
                on_release: root.show_contextual_run()
            ActionButton:
                text: 'Exit'
''')

    class Project(ContextualActionView):
        
        def show_contextual_options(self, *args):
            self.parent.add_widget(RunOptions())

    class RunOptions(ContextualActionView):
        pass

    class MainWindow(FloatLayout):
        
        def show_contextual_run(self, *args):
            self.action_bar.add_widget(Project())


    float_layout = MainWindow()
    runTouchApp(float_layout)