from __future__ import absolute_import, division, print_function, unicode_literals
__metaclass__ = type

import os
os.environ['KIVY_VIDEO'] = 'ffpyplayer'
# os.environ['KIVY_VIDEO'] = 'gstplayer'

from kivy.app import App
from kivy.clock import Clock
from kivy.uix.floatlayout import FloatLayout


class RootWidget(FloatLayout):
    def __init__(self, **kwargs):
        super(RootWidget, self).__init__(**kwargs)
        Clock.schedule_once(self._bind, -1)

    def _bind(self, *args):
        self.file_chooser.bind(selection=self.selection_changed)
        # Progress:
        self.video.bind(position=self.progress.setter('value'))
        self.video.bind(duration=self.progress.setter('max'))
        # Seek on grabbing:
        self.progress.bind(on_touch_down=self.down)
        self.progress.bind(on_touch_move=self.move)
        self.progress.bind(on_touch_up=self.up)

    def selection_changed(self, *args):
        self.video.source = self.file_chooser.selection[0]
        self.video.state = 'play'

    def down(self, _, touch):
        if self.progress.collide_point(*touch.pos):
            touch.grab(self.progress)
            self.video.state = 'pause'

    def move(self, _, touch):
        if touch.grab_current == self.progress:
            x, y = self.progress.to_widget(*touch.pos, relative=True)
            percent = x / self.progress.width
            self.video.seek(percent)

    def up(self, _, touch):
        if touch.grab_current == self.progress:
            touch.ungrab(self.progress)
            self.video.state = 'play'


class TestApp(App):
    def build(self):
        return RootWidget()


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