popupTest.py

from kivy.app import App
from kivy.lang import Builder
from kivy.properties import ObjectProperty
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.popup import Popup
from kivy.uix.textinput import TextInput


Builder.load_string("""
<LoadWalletPopup>:
    id: load_wallet_popup
    title: "Load Wallet Window"
    size_hint: 0.75, 0.75
    auto_dismiss: False
    wallet_path: wallet_path
    wallet_pw: wallet_pw
    repeat_wallet_pw: repeat_wallet_pw
    BoxLayout:
        padding: 60, 30, 60, 30
        orientation: 'vertical'
        Label:
            text: "Enter wallet keys path:"
        TabTextInput:
            id: wallet_path
            next: wallet_pw
        Label:
            text: "Enter wallet password:"
        TabTextInput:
            id: wallet_pw
            password: True
            next: repeat_wallet_pw
        Label:
            text: "Repeat wallet password:"
        TabTextInput:
            id: repeat_wallet_pw
            password: True
            next: wallet_path
        Button:
            text: "Click to load wallet"
            on_press: root.submitForm()

<RootWidget>
    BoxLayout:
        Button:
            text: "Press to launch popup"
            on_press: root.launchPopup()
""")


class TabTextInput(TextInput):
    """ Tab or enter to next TextInput class """
    def __init__(self, *args, **kwargs):
        self.next = kwargs.pop('next', None)
        super(TabTextInput, self).__init__(*args, **kwargs)
        self.multiline = False

    def set_next(self, next):
        self.next = next

    def _keyboard_on_key_down(self, window, keycode, text, modifiers):
        key, key_str = keycode
        print(key, key_str)
        if key == 9 and self.next is not None:
            self.next.focus = True
            self.next.select_all()
        else:
            super(TabTextInput, self)._keyboard_on_key_down(window, keycode, text, modifiers)


class LoadWalletPopup(Popup):
    """ Wallet creation screen popup """
    wallet_name = ObjectProperty()
    wallet_pw = ObjectProperty()
    repeat_wallet_pw = ObjectProperty()

    def __init__(self, *args, **kwargs):
        super(LoadWalletPopup, self).__init__(*args, **kwargs)

    def _keyboard_on_key_down(self, window, keycode, text, modifiers):
        key, key_str = keycode
        print(key, key_str)
        if key in (13, 271):
            self.submitForm()
        else:
            super(LoadWalletPopup, self)._keyboard_on_key_down(window, keycode, text, modifiers)

    def submitForm(self):
        self.dismiss()
        print("dismissed")

class RootWidget(BoxLayout):
    """Root Kivy accordion widget class"""
    def __init__(self, **kwargs):
        super(RootWidget, self).__init__(**kwargs)

    def launchPopup(self):
        p = LoadWalletPopup()
        p.open()

class lightWalletApp(App):
    def build(self):
        root = RootWidget()
        return root


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