import { IItemsIterator } from "./items-iterator";
export interface IScaleColumn {
    id: string;
    date: Date;
    index: number;
    groups?: IScaleGroup[];
}
export interface IScaleGroup {
    id: string;
    date: Date;
    coverageInPercents: number;
}
export interface IScale {
    startDate: Date;
    endDate: Date;
    columns: IScaleColumn[];
}
export interface IScaleGeneratorConfig {
    /**
     * Text formatter for dates in the header.
     */
    formatter: IScaleFormatter;
    /**
     * Sets the first date when the scale is starting.
     */
    getStartDate?: (iterator: IItemsIterator) => Date;
    /**
     * Sets the last date in the scale.
     */
    getEndDate?: (iterator: IItemsIterator) => Date;
}
export interface IScaleFormatter {
    formatColumn(column: IScaleColumn, columnWidth: number, locale: string): string;
    formatGroup?(group: IScaleGroup, locale: string): string;
}
export interface IScaleGenerator {
    /**
     * Formatter transforms date object into text in the header of timeline
     */
    formatter: IScaleFormatter;
    /**
     * Generate the scale with start date, end date, and columns. Groups are not required.
     */
    generateScale(startDate: Date, endDate: Date): IScale;
    /**
     * Returns the date when the scale starts depending on the items list.
     * By default, it takes the date of the first item and subtracts some time for free space.
     */
    getStartDate(itemsBuilder: IItemsIterator): Date;
    /**
     * Returns the date when the scale ends depending on the items list.
     * By default, it takes the date of the last item and adds some time for free space.
     */
    getEndDate(itemsBuilder: IItemsIterator): Date;
}