test_split_container_on_a_box_toga.py

import toga

class StartApp(toga.App):
    def startup(self):
        self.main_window = toga.MainWindow(self.name)
        self.main_window.app = self

        outer_box = toga.Box()
        box1 = toga.Box(children=[toga.Label('test')])
        box2 = toga.Box(children=[toga.Label('split_container')])

        split_container = toga.SplitContainer()
        split_container.content = [box1, box2]

        outer_box.add(split_container)

        self.main_window.content = outer_box
        self.main_window.show()

def main():
    app = StartApp('SplitContainer Test', 'org.pybee.test')
    app.main_loop()

if __name__ == '__main__':
    main()