import { ColumnRegular, ColumnTypes } from '@revolist/revogrid';
import { TimelineScale } from './timeline';
import { GanttVisualConfig } from './types';
/** Default task-table columns used when the host grid has no columns yet. */
export declare const DEFAULT_TASK_COLUMNS: readonly ColumnRegular[];
/**
 * Return task-table columns with enterprise-compatible date column wiring.
 *
 * Host applications may provide their own columns. This helper preserves those
 * columns while forcing `startDate` and `endDate` through
 * `@revolist/revogrid-column-date`, matching the enterprise Gantt convention.
 */
export declare function normalizeTaskColumns(columns: readonly ColumnRegular[]): ColumnRegular[];
/**
 * Build the complete column list managed by the plugin.
 *
 * The task table stays on the normal grid side and the timeline is appended as
 * a pinned-end column so RevoGrid owns horizontal scrolling and virtualization.
 */
export declare function createManagedGanttColumns(originalColumns: readonly ColumnRegular[], timelineWidth: number): ColumnRegular[];
/**
 * Build the column type registry required by the minimal Gantt renderer.
 *
 * Existing host column types are preserved. The date type is installed only
 * when absent, while the Gantt type is always refreshed so it reads the latest
 * timeline scale and visual configuration closures.
 */
export declare function createManagedColumnTypes(currentColumnTypes: ColumnTypes | undefined, getScale: () => TimelineScale | null, getVisuals: () => GanttVisualConfig | undefined): ColumnTypes;
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