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

/**
 * Crosshair Multi-Series Template
 *
 * Visual layout:
 * ┌──────────────────────────────────╮
 * │  ⌖ X = 0.234                     │
 * ├──────────────────────────────────┤
 * │  ● Forward:   45.67 µA           │
 * │  ● Reverse:  -32.10 µA           │
 * │  ○ Baseline:   0.05 µA           │
 * ╰──────────────────────────────────╯
 */
export declare class CrosshairTooltipTemplate implements TooltipTemplate<CrosshairTooltip> {
    readonly id = "crosshair";
    readonly name = "Multi-Series Crosshair";
    readonly supportedTypes: TooltipType[];
    private cachedKey;
    private cachedMeasurement;
    private formattedData;
    /**
     * Generate cache key from data and theme
     */
    private getCacheKey;
    /**
     * Format data for rendering
     */
    private formatData;
    /**
     * Measure tooltip dimensions
     */
    measure(ctx: CanvasRenderingContext2D, data: CrosshairTooltip, theme: TooltipTheme): TooltipMeasurement;
    /**
     * Render the tooltip
     */
    render(ctx: CanvasRenderingContext2D, data: CrosshairTooltip, position: TooltipPosition, measurement: TooltipMeasurement, theme: TooltipTheme): void;
}
export declare const crosshairTooltipTemplate: CrosshairTooltipTemplate;