Method action_scroll_up

src/textual/scrollbar.py:343–346

Scroll vertical scrollbars up, horizontal scrollbars left.

(self)

            self.post_message(ScrollDown() if self.vertical else ScrollRight())

    def action_scroll_up(self) -> None:
        """Scroll vertical scrollbars up, horizontal scrollbars left."""
        if not self.grabbed:
            self.post_message(ScrollUp() if self.vertical else ScrollLeft())

    def action_grab(self) -> None:
        """Begin capturing the mouse cursor."""