main.kv

MDFloatLayout:
    MDLabel:
        id: task_label
        halign: 'center'
        markup: True
        text: "[u][size=48][b]My Tasks[/b][/size][/u]"
        pos_hint: {'y': .45}

    ScrollView:
        pos_hint: {'center_y': .5, 'center_x': .5}
        size_hint: .9, .8

        MDList:
            id: container


    MDFloatingActionButton:
        icon: 'plus-thick'
        on_release: app.show_task_dialog()
        elevation_normal: 12
        pos_hint: {'x': .8, 'y':.05}

<DialogContent>:
    orientation: "vertical"
    spacing: "10dp"
    size_hint: 1, None
    height: "130dp"

    GridLayout:
        rows: 1

        MDTextField:
            id: task_text
            hint_text: "Add Task..."
            pos_hint: {"center_y": .4}
            max_text_length: 50
            on_text_validate: (app.add_task(task_text, date_text.text), app.close_dialog())

        MDIconButton:
            icon: 'calendar'
            on_release: root.show_date_picker()
            padding: '10dp'

    MDLabel:
        spacing: '10dp'
        id: date_text

    BoxLayout:
        orientation: 'horizontal'

        MDRaisedButton:
            text: "SAVE"
            on_release: (app.add_task(task_text, date_text.text), app.close_dialog())
        MDFlatButton:
            text: 'CANCEL'
            on_release: app.close_dialog()


<ListItemWithCheckbox>:
    id: the_list_item
    markup: True

    LeftCheckbox:
        id: check
        on_release: 
            root.mark(check, the_list_item)



    IconRightWidget:
        icon: 'trash-can-outline'
        theme_text_color: "Custom"
        text_color: 1, 0, 0, 1
        on_release:
            root.delete_item(the_list_item)