Struct IndicatorItem 

pub struct IndicatorItem {
    pub index: usize,
    pub start_offset: f32,
    pub size: f32,
}

One row of a ScalingLazyColumn, as ScalingLazyListItemInfo reports it.

Device pixels. Wear’s adapter reads a layout that has already been resolved onto the pixel grid — item heights are whole pixels, the viewport’s centre line is an integer halving — and it divides by those integers. Doing the same arithmetic in points quietly loses the halves, and the halves are what decide which item index the thumb’s ends land on.

scaling_list_items builds these from a laid-out list; a caller that already holds a real ScalingLazyListLayoutInfo can fill them in directly.

Fields

index: usize

The row’s index in the whole list.

start_offset: f32

ScalingLazyListItemInfo.startOffset(ItemCenter): the row’s top edge measured from the viewport’s centre line, after scaling.

size: f32

ScalingLazyListItemInfo.size: the row’s height after scaling, rounded to a whole pixel. Not the height the row is drawn at — the graphics layer scales by the unrounded scale — but this rounded one is what the layout info reports and therefore what the indicator divides by.

Trait Implementations

impl Clone for IndicatorItem

fn clone(&self) -> IndicatorItem

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for IndicatorItem

impl Debug for IndicatorItem

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for IndicatorItem

fn eq(&self, other: &IndicatorItem) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for IndicatorItem