import { VegaChart } from "./chart_base";
import { type VegaLiteSpec } from "./specs";
import type { ChartTheme } from "./theme";
import type { AxisConfig, ThemeMode } from "./types";
export interface GanttTask {
    /** Stable identifier — surfaced in click events. */
    id: string;
    /** Y-axis label; tasks with the same label collapse onto one row. */
    label: string;
    start: Date | string | number;
    end: Date | string | number;
    /** Bucket key into {@link GanttChartConfig.statusColors}. */
    statusGroup: string;
    /** Optional inline hover text; falls back to a default if omitted. */
    hover?: string;
    /** Free-form payload echoed back in click events. */
    customdata?: unknown;
}
export interface GanttChartConfig {
    tasks: GanttTask[];
    /** Map ``statusGroup`` → CSS colour. Missing keys fall back to ``#a3a3a3``. */
    statusColors: Record<string, string>;
    /** Optional friendly label per status group used in the legend. */
    statusLabels?: Record<string, string>;
    /** Optional per-status opacity (0–1) to fade pending/queued bars. */
    statusOpacity?: Record<string, number>;
    /** Order in which legend groups appear. Unknown keys are appended. */
    statusOrder?: string[];
    /** Bar thickness in pixels. Default 18. */
    barWidth?: number;
    /** Per-row spacing in pixels — drives total height. Default 28. */
    rowHeight?: number;
    /** Show the legend strip. Default true. */
    showLegend?: boolean;
    xAxis?: AxisConfig;
    modebar?: boolean;
    theme?: ThemeMode;
    /** Named preset from presets/*.json. Default "molplot". */
    preset?: string;
}
export interface GanttClickEvent {
    taskId: string;
    label: string;
    customdata?: unknown;
}
type ClickListener = (e: GanttClickEvent) => void;
/**
 * Gantt chart drawn as one time-spanning bar per task (Vega-Lite bar with
 * `x`/`x2`), coloured by status group. Cleaner than the former plotly
 * line-segment recipe while keeping the same config surface and the
 * `onTaskClick` contract.
 */
export declare class GanttChart extends VegaChart {
    private config;
    private readonly clickListeners;
    constructor(container: HTMLElement, config: GanttChartConfig);
    update(partial: Partial<GanttChartConfig>): Promise<void>;
    onTaskClick(cb: ClickListener): () => void;
    private rows;
    protected datasets(): Record<string, unknown[]>;
    protected buildSpec(theme: ChartTheme, sizeHint: {
        width: number;
        height: number;
    }): VegaLiteSpec;
    protected onDatum(datum: Record<string, unknown>): void;
}
export {};