from kivy.app import App
from kivy.lang import Builder
from kivy.uix.recycleview import RecycleView
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.gridlayout import GridLayout
from kivy.config import Config

Config.set("graphics", 'resizable', 0)
Config.set("graphics", 'height', 960)
Config.set("graphics", 'width', 640)

Builder.load_string("""

<Button1@Button>:
    background_color:255, 255, 255, 1
    size:300,150
    size_hint:None, None

<Image>:
    source:'фон.jpg'
    allow_stretch: True

<Label>:
    color:0,0,0,1
    font_size:30

<BoxLayout>:
    orientation:'vertical'
    spacing:200
    padding:170,200
    background_color:1,1,1,1

<GridLayout10@GridLayout>:
    cols:2
    spacing:10,40
    padding:15

<MainScreen>:
    name:"Menu"
    Image
    BoxLayout:
        Button1:
            on_press:root.manager.current="Subjects"
            text:"Subjects"
        Button1:
            text:"Special"
            on_press:root.manager.current="Special"


<SubjectsScreen>:
    name:"Subjects"
    Image
    BoxLayout:
        Button1:
            text:"10 class"
            on_press:root.manager.current="SubjectsScreen10"
        Button1:
            text:"11 class"
            on_press:root.manager.current="SubjectsScreen11"

<SubjectsScreen10>:
    name:"SubjectsScreen10"
    Image
    GridLayout10:
        Button1:
            text:"Геометрия"
        Button1:
            text:"Алгебра"
        Button1:
            text:"Химия"
        Button1:
            text:"Физика"
        Button1:
            text:"Русская литература"
        Button1:
            text:"Русский язык"
        Button1:
            text:"География"
        Button1:
            text:"Биология"
        Button1:
            text:"Белорусский язык"

<SubjectsScreen11>:
    name:"SubjectsScreen11"
    Image
    GridLayout10:
        Button1:
            text:"Алгебра"
        Button1:
            text:"Геометрия"
        Button1:
            text:"Физика"
        Button1:
            text:"Химия"
        Button1:
            text:"Русская литература"
        Button1:
            text:"Русский язык"
        Button1:
            text:"География"
        Button1:
            text:"Биология"
        Button1:
            text:"Белорусский язык"
        Button1:
            text:"Астрономия"

<SpecialSubjectsScreen>:
    name:"Special"
    Image
    AnchorLayout:
        Button1:
            text:"No material(Back)"
            on_press: root.manager.current='Menu'
""")


class MainScreen(Screen):
    pass


class SpecialSubjectsScreen(Screen):
    pass


class SubjectsScreen(Screen):
    pass


class SubjectsScreen10(Screen):
    pass


class SubjectsScreen11(Screen):
    pass


sm = ScreenManager()
sm.add_widget(MainScreen(name='Menu'))
sm.add_widget(SpecialSubjectsScreen(name='Special'))
sm.add_widget(SubjectsScreen(name="Subjects"))
sm.add_widget(SubjectsScreen10(name="SubjectsScreen10"))
sm.add_widget(SubjectsScreen11(name="SubjectsScreen11"))


class LibraryApp(App):
    def build(self):
        return sm


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