import { utils } from "pixi.js";
import { DButtonBase } from "./d-button-base";
import { DOnOptions } from "./d-on-options";
/**
 * {@link DButtonGroup} events.
 */
export interface DButtonGroupEvents<BUTTON, EMITTER> {
    /**
     * Triggered when the active button is changed.
     *
     * @param emitter an emitter
     */
    active(newActive: BUTTON | null, oldActive: BUTTON | null, emitter: EMITTER): void;
}
/**
 * {@link DButtonGroup} "on" options.
 */
export interface DButtonGroupOnOptions<BUTTON, EMITTER> extends Partial<DButtonGroupEvents<BUTTON, EMITTER>>, DOnOptions {
}
export interface DButtonGroupOptions<BUTTON extends DButtonBase<any, any, any> = DButtonBase<any, any, any>, EMITTER = any> {
    on?: DButtonGroupOnOptions<BUTTON, EMITTER>;
}
export declare class DButtonGroup<BUTTON extends DButtonBase<any, any, any> = DButtonBase<any, any, any>, OPTIONS extends DButtonGroupOptions<BUTTON> = DButtonGroupOptions<BUTTON>> extends utils.EventEmitter {
    protected _buttons: BUTTON[];
    protected _active: BUTTON | null;
    protected _onActiveBound: (button: BUTTON) => void;
    protected _isEnabled?: boolean;
    constructor(options?: OPTIONS);
    add(button: BUTTON): void;
    get active(): BUTTON | null;
    set active(newActive: BUTTON | null);
    remove(button: BUTTON): void;
    contains(button: BUTTON): boolean;
    clear(): void;
    size(): number;
    each(iteratee: (button: BUTTON) => boolean | void): void;
    disable(): void;
    enable(): void;
    destroy(): void;
}