Struct PrimitiveView 

pub struct PrimitiveView<'a> {
    pub series: SeriesId,
    pub study: Option<&'a dyn Indicator>,
    pub mapping: ChartMapping,
    pub bars: &'a [Bar],
    pub visible: Range<usize>,
}

The pane and scale a primitive draws on in the current frame.

Fields

series: SeriesId

The series the primitive is attached to.

study: Option<&'a dyn Indicator>

The study the primitive is attached to, whose values a custom series renderer draws. None for a bar series.

mapping: ChartMapping

Bar index to x on the time axis the panes share, and price to y on the series’ price scale. mapping.rect is the plot area of the pane.

bars: &'a [Bar]

The bars laid out on the time axis, oldest first: the main series, or the elements of a price-based chart type. Bar i is centred at index_to_x(i as f64).

visible: Range<usize>

The indices of bars in view.

Implementations

impl PrimitiveView<'_>

pub fn point_groups(&self, factor: usize) -> impl Iterator<Item = Range<usize>>

Aligned source ranges for a custom renderer’s merge hook. Groups start at multiples of factor, include the visible range’s edge groups and never exceed bars. A factor of zero is treated as one. Merge values in source order so open/close and extrema keep their meaning; host payload aggregation belongs to the renderer.

pub fn index_to_x(&self, index: f64) -> f32

The x of a fractional bar index, the centre of bar index when it is whole.

pub fn time_to_x(&self, time: DateTime<Utc>) -> Option<f32>

The x of a UTC time, interpolated between bars. Without a timeframe, whitespace extends the most common positive spacing among the outermost 16 bars (shorter spacing breaks ties, one second if none). None without bars.

Trait Implementations

impl<'a> Clone for PrimitiveView<'a>

fn clone(&self) -> PrimitiveView<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.