Struct LiquidityHeatmap 

pub struct LiquidityHeatmap {
    pub config: LiquidityHeatmapConfig,
    /* private fields */
}

A liquidity heatmap backed by bounded texture tiles. Retain it between frames.

Each column uses logarithmic contrast against its largest resting size unless Self::config sets a shared full-intensity size. A cell whose largest recorded order reaches a size tier of the OrderBookView takes that tier’s colour over its shading. Empty prices and missing time periods stay transparent. Old columns release their atlas slots; new or changed columns upload only their own texels. Changed colours, tiers or appearance upload every held column once. No texture side exceeds the backend’s limit.

Fields

config: LiquidityHeatmapConfig

Cell brightness and size range, applied on the next render. Unchanged effective settings upload nothing; changed settings redraw every held column once.

Implementations

impl LiquidityHeatmap

pub fn render( &mut self, painter: &Painter, mapping: &ChartMapping, history: &DepthHistory, step: f64, time_to_x: impl Fn(DateTime<Utc>) -> Option<f32>, view: &OrderBookView, colors: [Color32; 2], )

Draws the history using the pane’s price mapping and the host’s time-to-x conversion. step is the instrument tick size times the history’s ticks per row. view gives the size tiers and their colours, as for the book profile, from the painter’s active theme when the view sets none; its filter and profile do not apply, since the history sampled the orders of its own DepthHistoryConfig::orders. Buy and sell colours follow the painter’s host; call with the same colours as the price series.

Trait Implementations

impl Default for LiquidityHeatmap

fn default() -> LiquidityHeatmap

Returns the “default value” for a type.