kivy/examples/widgets/tabbed_panel_test.py

'''
TabbedPannel
======

Test of the widget TabbedPannel.
'''

from kivy.app import App
from kivy.animation import Animation
from kivy.clock import Clock
from kivy.uix.button import Button
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.tabbedpannel import TabbedPannel
from kivy.properties import ObjectProperty

from kivy.lang import Builder
Builder.load_string('''
<cut_copy_paste>
    size_hint: (None, None)
    size: (350, 250)
    pos_hint: {'center_x': .25, 'y': .55}
    tab_pos: 'top_left'
    tab_height: 20
    tab_width: 70
    default_tab_text: 'tab1'
    default_content: cut
    FloatLayout:
        BoxLayout
            id: cut
            pos:self.parent.pos
            size: self.parent.size
            padding: 3
            TextInput:
                text: 'everything is relative!'
            BubbleButton:
                text:'dummy'
        Image:
            id: copy
            color: 1, 1, 1, 0
            pos:self.parent.pos
            size: self.parent.size
            source: 'data/images/defaulttheme-0.png'
        Image:
            id: paste
            color: 1, 1, 1, 0
            pos:self.parent.pos
            size: self.parent.size
            source: 'data/images/image-loading.gif'
    Tab_Heading:
        text: 'tab2'
        on_release: root.change_tab_contents(copy)
    Tab_Heading:
        text: 'tab3'
        on_release: root.change_tab_contents(paste)
    #Tab_Heading:
    #    text: 'tab4'
    #    on_release: root.clear_widgets()
    #Tab_Heading:
    #    text: 'tab5'
    #    on_release: root.clear_widgets()
''')


class cut_copy_paste(TabbedPannel):

    default_content = ObjectProperty(None)

    def on_default_tab(self, *l):
        self.change_tab_contents(self.default_content)

    def change_tab_contents(self, *l):
        anim = Animation(color=(1, 1, 1, 0), d =.24, t = 'in_back')

        def start_anim(_anim, child, in_complete, *lt):
            if hasattr(child, 'color'):
                _anim.start(child)
            elif not in_complete:
                _on_complete()

        def _on_complete(*lt):
            if l[0].parent:
                l[0].parent.remove_widget(l[0])
            self.clear_widgets()
            self.add_widget(l[0])
            anim = Animation(color = (1, 1, 1, 1), d =.23, t = 'in_quad')
            start_anim(anim, l[0], True)

        anim.bind(on_complete = _on_complete)
        start_anim(anim, self.content.children[0], False)


class TabShowcase(FloatLayout):

    def __init__(self, **kwargs):
        super(TabShowcase, self).__init__(**kwargs)
        self.but = Button(text='Press to show Tabbed Pannel')
        self.but.bind(on_release=self.show_tab)
        self.add_widget(self.but)

    def show_tab(self, *l):
        if not hasattr(self, 'tab'):
            self.tab = tab = cut_copy_paste()
            self.add_widget(tab)
        else:
            values = ('left_top', 'left_mid', 'left_bottom', 'top_left',
                'top_mid', 'top_right', 'right_top', 'right_mid',
                'right_bottom', 'bottom_left', 'bottom_mid', 'bottom_right')
            index = values.index(self.tab.tab_pos)
            self.tab.tab_pos = values[(index + 1) % len(values)]
        self.but.text = 'Tabs in\'%s\' position,\n press to change to next pos'\
                %self.tab.tab_pos


class TestTabApp(App):

    def build(self):
        return TabShowcase()

if __name__ in ('__main__', '__android__'):
    TestTabApp().run()