import { ContextManager, Context } from '../context';
import { Event } from '../event';
import { Observable } from '../observable';
export declare enum Orientation {
    Portrait = "portrait",
    Landscape = "landscape",
    PortraitSecondary = "portrait-secondary",
    LandscapeSecondary = "landscape-secondary"
}
/**
 * Manages and tracks orientation changes in the application context.
 * @zcontext
 */
export declare class OrientationContext extends Context {
    /**
     * Observable indicating whether the current orientation is portrait.
     * @zui
     */
    readonly isPortrait: Observable<boolean>;
    /**
     * Observable indicating whether the current orientation is landscape.
     * @zui
     */
    readonly isLandscape: Observable<boolean>;
    /**
     * Observable indicating whether the current orientation is secondary portrait.
     * @zui
     */
    readonly isPortraitSecondary: Observable<boolean>;
    /**
     * Observable indicating whether the current orientation is secondary landscape.
     * @zui
     */
    readonly isLandscapeSecondary: Observable<boolean>;
    /**
     * Observable representing the current orientation.
     */
    readonly orientation: Observable<Orientation>;
    /**
     * Event triggered when the orientation changes to portrait.
     */
    readonly onPortrait: Event<[void]>;
    /**
     * Event triggered when the orientation changes to landscape.
     */
    readonly onLandscape: Event<[void]>;
    /**
     * Event triggered when the orientation changes to secondary portrait.
     */
    readonly onPortraitSecondary: Event<[void]>;
    /**
     * Event triggered when the orientation changes to secondary landscape.
     */
    readonly onLandscapeSecondary: Event<[void]>;
    /**
     * Event triggered when there is any orientation change.
     */
    readonly onOrientationChange: Event<[Orientation]>;
    /**
     * Creates an instance of OrientationContext.
     * @param contextManager - The current ContextManager
     */
    constructor(contextManager: ContextManager);
    private attachListeners;
    private _onOrientationChange;
    private orientationChangeHandler;
    private getOrientation;
    private getOrientationFromScreen;
    private getOrientationFromWindow;
    private getOrientationFromDimensions;
    dispose: () => never;
}
/**
 * Returns an observable that notifies when the orientation changes.
 * @param mgr The ContextManager instance to access the OrientationContext.
 * @returns Observable for orientation change events.
 */
export declare function useOnOrientationChange(mgr: ContextManager): Event<[Orientation]>;
/**
 * Retrieves the current orientation value.
 * @param mgr The ContextManager instance to access the OrientationContext.
 * @returns The current orientation as an Orientation enum value.
 */
export declare function getOrientation(mgr: ContextManager): Orientation;
/**
 * Determines if the current orientation is portrait.
 * @param mgr The ContextManager instance to access the OrientationContext.
 * @returns True if the orientation is portrait, false otherwise.
 */
export declare function isPortrait(mgr: ContextManager): boolean;
/**
 * Determines if the current orientation is landscape.
 * @param mgr The ContextManager instance to access the OrientationContext.
 * @returns True if the orientation is landscape, false otherwise.
 */
export declare function isLandscape(mgr: ContextManager): boolean;
/**
 * Determines if the current orientation is secondary portrait.
 * @param mgr The ContextManager instance to access the OrientationContext.
 * @returns True if the orientation is secondary portrait, false otherwise.
 */
export declare function isPortraitSecondary(mgr: ContextManager): boolean;
/**
 * Determines if the current orientation is secondary landscape.
 * @param mgr The ContextManager instance to access the OrientationContext.
 * @returns True if the orientation is secondary landscape, false otherwise.
 */
export declare function isLandscapeSecondary(mgr: ContextManager): boolean;