Struct ScrollTracker 

pub struct ScrollTracker { /* private fields */ }

Implementations

impl ScrollTracker

pub fn new() -> Self

Create a new scroll tracker.

pub fn track(&self, scroll: Scroll) -> Scroll

Wrap a Scroll view to track its viewport changes.

pub fn has_scrolled(&self) -> bool

Returns true if any scroll events have been recorded.

pub fn scroll_count(&self) -> usize

Returns the number of scroll events recorded.

pub fn last_offset(&self) -> Option<Vec2>

Returns the last recorded viewport, if any.

pub fn offsets(&self) -> Vec<Vec2>

Returns all recorded viewports in order.

pub fn scroll_position(&self) -> Option<Point>

Returns the current scroll position (top-left of viewport).

pub fn reset(&self)

Reset the tracker, clearing all recorded viewports.

Trait Implementations

impl Clone for ScrollTracker

fn clone(&self) -> ScrollTracker

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Default for ScrollTracker

fn default() -> ScrollTracker

Returns the “default value” for a type.