KivyMD

from kivy.lang import Builder

from kivymd.app import MDApp
from kivymd.uix.taptargetview import MDTapTargetView

KV = '''
Screen:
    id: screen

    MDFloatingActionButton:
        id: button
        icon: "plus"
        pos: 10, 10
        on_release: app.tap_target_start()
        on_press: app.printIds()

    MDCard:
        id: card
        size_hint: None, None
        size: "280dp", "180dp"
        pos_hint: {"center_x": .5, "center_y": .5}

        MDLabel:
            id: label
            text: "MDLabel"
            halign: "left"


        MDIconButton:
            id: button2
            icon: "android"
            theme_text_color: "Custom"
            text_color: app.theme_cls.primary_color
            on_press: app.printIds()
'''


class TapTargetViewDemo(MDApp):
    def build(self):
        screen = Builder.load_string(KV)
        self.tap_target_view = MDTapTargetView(
            widget=screen.ids.button,
            title_text="This is an add button",
            description_text="This is a description of the button",
            widget_position="left_bottom",
        )

        return screen

    def tap_target_start(self):
        if self.tap_target_view.state == "close":
            self.tap_target_view.start()
        else:
            self.tap_target_view.stop()

    def printIds(self):
        self.root.ids.label.text = "e che cazzo"


TapTargetViewDemo().run()