textlabeling.kv

MainScreen:

<MainScreen>:
    text_input_url: text_input_url
    button_positive: button_positive
    button_negative: button_negative
    button_skip: button_skip
    text_comment: comment
    skip_interval: skip_interval
    text_comment_count: text_comment_count

    orientation: 'vertical'

    BoxLayout:
        orientation: "horizontal"
        height: "40dp"
        size_hint_y: None

        Label:
            text: "Enter Youtube URL: "
            size_hint_x: 1
        TextInput:
            id: text_input_url
            multiline: False
            size_hint_x: 3
        Button:
            text: "Crawl"
            size_hint_x: 1
            on_press: root.start()

    TextInput:
        id: comment
        text: "Enter a valid Youtube URL first"
        font_size: "30dp"
        disabled: True

    BoxLayout:
        orientation: "horizontal"
        height: "40dp"
        size_hint_y: None

        Button:
            id: button_positive
            text: "Positive"
            disabled: True
            on_press: root.label("pos")

        Button:
            id: button_negative
            text: "Negative"
            disabled: True
            on_press: root.label("neg")

    
    BoxLayout:
        orientation: "horizontal"
        height: "40dp"
        size_hint_y: None

        Label:
            size_hint_x: 2
            id: text_comment_count
        Button:
            id: button_skip
            text: "Skip"
            disabled: True
            on_press: root.get_next_comment()
            size_hint_x: 2
        
        Label:
            text: "Skip interval:"
            size_hint_x: 1
        TextInput:
            id: skip_interval
            input_filter: "int"
            text: "1"
            size_hint_x: 1
        


<ErrorPopup>:
    auto_dismiss: False
    size_hint: None, None
    size: 200, 200
    title: ""

    BoxLayout:
        orientation: "vertical"
        Label:
            text: "Invalid URL"
        Button:
            size_hint_y: None
            height: "40dp"
            text: "Close"
            on_press: root.dismiss()

<ScaleLabel@Label>:
    _scale: 1. if self.texture_size[0] < self.width else float(self.width) / self.texture_size[0]
    canvas.before:
        PushMatrix
        Scale:
            origin: self.center
            x: self._scale or 1.
            y: self._scale or 1.
    canvas.after:
        PopMatrix