import { KeyboardHelperWithArrowButtonBase } from '@devexpress/analytics-core/analytics-internal-native';
export declare abstract class PictureEditorKeyboardHelperBase extends KeyboardHelperWithArrowButtonBase {
    protected _leaveHandler: () => void;
    constructor(_leaveHandler: () => void);
    itemHandleUpArrowKey(e: any, index: any): boolean;
    itemHandleDownArrowKey(e: any, index: any): boolean;
    itemHandleLeftArrowKey(e: any, index: any): boolean;
    itemHandleRightArrowKey(e: any, index: any): boolean;
    itemHandleEnterKey(e: any, index: any): boolean;
    itemHandleSpaceKey(e: any, index: any): boolean;
    itemHandleEscKey(e: any, index: any): boolean;
}
export declare class PictureEditorToolbarKeyboardHelper extends PictureEditorKeyboardHelperBase {
    controlElementClassName: string;
    initialize(): void;
    itemHandleTabKey(e: any, index: any): boolean;
    itemHandleShiftTabKey(e: any, index: any): boolean;
    handleEscKey(e: any): boolean;
}
export declare class PictureEditorPopoverKeyboardHelper extends PictureEditorKeyboardHelperBase {
    static itemSelectors: string[];
    focusFirstFocusableDescendant: boolean;
    initialize(): void;
    getElements(predicate?: (elt: Element) => boolean): HTMLElement[];
    handleEscKey(e: any): boolean;
    protected _keyDownHandler(e: any): void;
}