import { utils } from "pixi.js";
import { DControllerFocus, DFocusable, DFocusableContainer, DFocusableMightBe } from "./d-controller-focus";
export declare class DControllerFocusImpl extends utils.EventEmitter implements DControllerFocus {
    private _focused;
    focus(focusable: DFocusable | null): DFocusable | null;
    blur(focusable: DFocusable | null): DFocusable | null;
    clear(): DFocusable | null;
    set(focusable: DFocusable | null, isFocused: boolean): DFocusable | null;
    get(): DFocusable | null;
    findParent(mightBeFocusable: DFocusableMightBe | null): DFocusable | null;
    find(target: DFocusableMightBe, includesTarget: boolean, includesTargetChildren: boolean, direction: boolean, root?: unknown): DFocusable | null;
    protected findNext(target: DFocusableMightBe, includesTarget: boolean, includesTargetChildren: boolean): DFocusable | null;
    protected findPrevious(target: DFocusableMightBe, includesTarget: boolean, includesTargetChildren: boolean): DFocusable | null;
    protected isFocusable(target: any): target is DFocusable;
    protected isFocusableContainer(target: any): target is DFocusableContainer;
    protected isFocusRoot(target: any, root: unknown): target is DFocusable;
    protected isFocusReverse(target: any): boolean;
}