import type { Viewport } from '../Viewport.js';
import type { Props as ViewProps } from '../View.js';
import { View } from '../View.js';
import { Size } from '../geometry.js';
export interface LegendItem {
    key: string | string[];
    label: string;
}
export interface Props extends ViewProps {
    separator?: string;
}
export interface ComputedItem {
    keyText: string;
    keyWidth: number;
    label: string;
    labelWidth: number;
    totalWidth: number;
}
export declare abstract class AbstractLegend extends View {
    #private;
    constructor(props: Props);
    update(props: Props): void;
    computeItems(items: LegendItem[]): ComputedItem[];
    /**
     * called during render and naturalSize - subclasses cache the result.
     */
    abstract collectItems(): ComputedItem[];
    naturalSize(available: Size): Size;
    render(viewport: Viewport): void;
}