Enum Scroller 

pub enum Scroller {
    Pane(ScrollHandle),
    List(ListState),
}

What a bar, a follow or a drag region reads and moves: a scrolling div’s ScrollHandle or a gpui::list’s ListState, in the handle’s terms — offset negative going down, max_offset the overflow.

A list counts only the items it has measured: one never laid out adds nothing to max_offset, so both readings grow as the list is scrolled through. A list’s offset is vertical only.

offset never reads past max_offset. A div’s wheel handler moves its handle past the end and the div clamps it when next laid out, so a raw read before that layout is where the content will not be drawn.

Variants

Pane(ScrollHandle)

List(ListState)

Implementations

impl Scroller

pub fn bounds(&self) -> Bounds<Pixels>

The viewport as last laid out, in window coordinates.

pub fn offset(&self) -> Point<Pixels>

pub fn max_offset(&self) -> Point<Pixels>

pub fn set_offset(&self, offset: Point<Pixels>)

Takes effect at the next layout. A list clamps to what it has measured.

pub fn scroll_to_end(&self)

Past the last of the content. A list anchors on its last item and lays out backwards from it, so the end is reached in one frame however much of it is unmeasured.

Trait Implementations

impl Clone for Scroller

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl From<&ListState> for Scroller

fn from(state: &ListState) -> Self

Converts to this type from the input type.

impl From<&ScrollHandle> for Scroller

fn from(handle: &ScrollHandle) -> Self

Converts to this type from the input type.

impl From<ListState> for Scroller

fn from(state: ListState) -> Self

Converts to this type from the input type.

impl From<ScrollHandle> for Scroller

fn from(handle: ScrollHandle) -> Self

Converts to this type from the input type.