import { HeatmapTooltip, TooltipTemplate, TooltipMeasurement, TooltipPosition, TooltipTheme, TooltipType } from '../types';

/**
 * Heatmap Template
 *
 * Visual layout:
 * ┌────────────────────────────╮
 * │  Grid [45, 128]            │
 * │  ──────────────────────────│
 * │  ████ Value: 0.847         │
 * │       Min: 0.0 Max: 1.0    │
 * │                            │
 * │  X: 100.0 Hz               │
 * │  Y: 2.50 s                 │
 * ╰────────────────────────────╯
 */
export declare class HeatmapTooltipTemplate implements TooltipTemplate<HeatmapTooltip> {
    readonly id = "heatmap";
    readonly name = "Heatmap Value";
    readonly supportedTypes: TooltipType[];
    private readonly swatchSize;
    private readonly swatchGap;
    private cachedKey;
    private cachedMeasurement;
    /**
     * Measure tooltip dimensions
     */
    measure(ctx: CanvasRenderingContext2D, data: HeatmapTooltip, theme: TooltipTheme): TooltipMeasurement;
    /**
     * Render the tooltip
     */
    render(ctx: CanvasRenderingContext2D, data: HeatmapTooltip, position: TooltipPosition, measurement: TooltipMeasurement, theme: TooltipTheme): void;
}
export declare const heatmapTooltipTemplate: HeatmapTooltipTemplate;