design.kv

<WelcomeScreen>:
    MDFloatLayout:
        canvas.before:
            Color:
                rgba: 0,0,0,1
            Rectangle:
                pos: self.pos
                size: self.size
        Label:
            text:"Welcome to FilterGram..."
            color: 1,1,1,1
            pos_hint: {"center_x":.5, "center_y":.6}
            font_size: "30sp"

<SelectImage>:
    MDFloatLayout:
        MDFillRoundFlatButton:
            text: "Choose image..."
            font_size: "35sp"
            md_bg_color: app.theme_cls.accent_color
            radius:[30]
            pos_hint: {"center_x": .5, "center_y":.5}
            on_release: root.ChooseImage()

<Loading>:
    MDFloatLayout:
        MDProgressBar:
            id:progress
            type: "indeterminate"
            pos_hint: {"center_x":.5, "center_y": .5}
            running_duration: 0.5
            catching_duration: 1

<ShowResult>:
    MDBoxLayout:
        orientation:"horizontal"
        MDSwiper:
            id: ResultList
            pos_hint: {"center_x":.5, "center_y":.5}
           


<WindowsManager>:
    id: manager
    WelcomeScreen:
        manager: manager
        name:"welcomescreen"
    SelectImage:
        manager: manager
        name:"selectimage"
    Loading:
        manager: manager
        name:"loading"
    ShowResult:
        manager: manager
        name:"showresult"