KivyのUI要素のshow/hide

main.py

#-*- coding: utf-8 -*-

from kivy.app import App
from kivy.uix.widget import Widget

from kivy.properties import NumericProperty 

class TestWidget(Widget):
    testTextInput2_Opacity = NumericProperty()
    testTextInput2_size_hint_y = NumericProperty()
    show_hide = 0

    def __init__(self, **kwargs):
        super(TestWidget, self).__init__(**kwargs)
        self.testTextInput2_Opacity = 1
        self.testTextInput2_size_hint_y = 0.2

    def buttonClicked(self):
        if self.show_hide == 0:
            self.ids.box.remove_widget(self.ids.testTextInput2)
            self.ids.box.add_widget(self.ids.testTextInput2, 0)
            self.testTextInput2_Opacity = 0
            self.show_hide = 1
        else:
            self.ids.box.remove_widget(self.ids.testTextInput3)
            self.ids.box.add_widget(self.ids.testTextInput3, 0)
            self.testTextInput2_Opacity = 1
            self.show_hide = 0

class TestApp(App):
    def __init__(self, **kwargs):
        super(TestApp, self).__init__(**kwargs)

    def build(self):
        return TestWidget()

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

test.kv

#-*- coding: utf-8 -*-

from kivy.app import App
from kivy.uix.widget import Widget

from kivy.properties import NumericProperty 

class TestWidget(Widget):
    testTextInput2_Opacity = NumericProperty()
    testTextInput2_size_hint_y = NumericProperty()
    show_hide = 0

    def __init__(self, **kwargs):
        super(TestWidget, self).__init__(**kwargs)
        self.testTextInput2_Opacity = 1
        self.testTextInput2_size_hint_y = 0.2

    def buttonClicked(self):
        if self.show_hide == 0:
            self.ids.box.remove_widget(self.ids.testTextInput2)
            self.ids.box.add_widget(self.ids.testTextInput2, 0)
            self.testTextInput2_Opacity = 0
            self.show_hide = 1
        else:
            self.ids.box.remove_widget(self.ids.testTextInput3)
            self.ids.box.add_widget(self.ids.testTextInput3, 0)
            self.testTextInput2_Opacity = 1
            self.show_hide = 0

class TestApp(App):
    def __init__(self, **kwargs):
        super(TestApp, self).__init__(**kwargs)

    def build(self):
        return TestWidget()

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

これで中間の要素をshow/hideできる
なんかあんまり使い方がしっくりこない
自分用メモ