import { type EventSubscription } from 'expo-modules-core';
import type { NavigationBarBehavior, NavigationBarButtonStyle, NavigationBarPosition, NavigationBarStyle, NavigationBarVisibility, NavigationBarVisibilityEvent } from './NavigationBar.types';
/**
 * Observe changes to the system navigation bar.
 * Due to platform constraints, this callback will also be triggered when the status bar visibility changes.
 *
 * @example
 * ```ts
 * NavigationBar.addVisibilityListener(({ visibility }) => {
 *   // ...
 * });
 * ```
 */
export declare function addVisibilityListener(listener: (event: NavigationBarVisibilityEvent) => void): EventSubscription;
/**
 * Changes the navigation bar's background color.
 *
 * @param color Any valid [CSS 3 (SVG) color](http://www.w3.org/TR/css3-color/#svg-color).
 * @deprecated Due to Android edge-to-edge enforcement, setting the navigation bar background color is deprecated and has no effect. This will be removed in a future release.
 *
 * @example
 * ```ts
 * NavigationBar.setBackgroundColorAsync("white");
 * ```
 */
export declare function setBackgroundColorAsync(color: string): Promise<void>;
/**
 * Gets the navigation bar's background color.
 *
 * @returns Current navigation bar color in hex format. Returns `#00000000` (transparent) on unsupported platforms (iOS, web).
 * @deprecated Due to Android edge-to-edge enforcement, getting the navigation bar background color is deprecated and always returns `#00000000` (transparent). This will be removed in a future release.
 *
 * @example
 * ```ts
 * const color = await NavigationBar.getBackgroundColorAsync();
 * ```
 */
export declare function getBackgroundColorAsync(): Promise<string>;
/**
 * Changes the navigation bar's border color.
 *
 * @param color Any valid [CSS 3 (SVG) color](http://www.w3.org/TR/css3-color/#svg-color).
 * @deprecated Due to Android edge-to-edge enforcement, setting the navigation bar border color is deprecated and has no effect. This will be removed in a future release.
 *
 * @example
 * ```ts
 * NavigationBar.setBorderColorAsync("red");
 * ```
 */
export declare function setBorderColorAsync(color: string): Promise<void>;
/**
 * Gets the navigation bar's top border color, also known as the "divider color".
 *
 * @returns Navigation bar top border color in hex format. Returns `#00000000` (transparent) on unsupported platforms (iOS, web).
 * @deprecated Due to Android edge-to-edge enforcement, getting the navigation bar border color is deprecated and always returns `#00000000` (transparent). This will be removed in a future release.
 *
 * @example
 * ```ts
 * const color = await NavigationBar.getBorderColorAsync();
 * ```
 */
export declare function getBorderColorAsync(): Promise<string>;
/**
 * Set the navigation bar's visibility.
 *
 * @param visibility Based on CSS visibility property.
 * @platform android
 *
 * @example
 * ```ts
 * NavigationBar.setVisibilityAsync("hidden");
 * ```
 */
export declare function setVisibilityAsync(visibility: NavigationBarVisibility): Promise<void>;
/**
 * Get the navigation bar's visibility.
 *
 * @returns Navigation bar's current visibility status. Returns `hidden` on unsupported platforms (iOS, web).
 *
 * @example
 * ```ts
 * const visibility = await NavigationBar.getVisibilityAsync();
 * ```
 */
export declare function getVisibilityAsync(): Promise<NavigationBarVisibility>;
/**
 * Changes the navigation bar's button colors between white (`light`) and a dark gray color (`dark`).
 *
 * @param style Dictates the color of the foreground element color.
 * @deprecated Use `setStyle` instead. This will be removed in a future release.
 *
 * @example
 * ```ts
 * NavigationBar.setButtonStyleAsync("light");
 * ```
 */
export declare function setButtonStyleAsync(style: NavigationBarButtonStyle): Promise<void>;
/**
 * Gets the navigation bar's button color style.
 *
 * @returns Navigation bar foreground element color settings. Returns `light` on unsupported platforms (iOS, web).
 * @deprecated Due to Android edge-to-edge enforcement, getting the navigation bar button color style is deprecated and always returns `light`. This will be removed in a future release.
 *
 * @example
 * ```ts
 * const style = await NavigationBar.getButtonStyleAsync();
 * ```
 */
export declare function getButtonStyleAsync(): Promise<NavigationBarButtonStyle>;
/**
 * Sets positioning method used for the navigation bar (and status bar).
 * Setting position `absolute` will float the navigation bar above the content,
 * whereas position `relative` will shrink the screen to inline the navigation bar.
 *
 * When drawing behind the status and navigation bars, ensure the safe area insets are adjusted accordingly.
 *
 * @param position Based on CSS position property.
 * @deprecated Due to Android edge-to-edge enforcement, setting the navigation bar position is deprecated and has no effect. This will be removed in a future release.
 *
 * @example
 * ```ts
 * // enables edge-to-edge mode
 * await NavigationBar.setPositionAsync('absolute')
 * // transparent backgrounds to see through
 * await NavigationBar.setBackgroundColorAsync('#ffffff00')
 * ```
 */
export declare function setPositionAsync(position: NavigationBarPosition): Promise<void>;
/**
 * Whether the navigation and status bars float above the app (absolute) or sit inline with it (relative).
 * This value can be incorrect if `androidNavigationBar.visible` is used instead of the config plugin `position` property.
 *
 * This method is unstable because the position can be set via another native module and get out of sync.
 * Alternatively, you can get the position by measuring the insets returned by `react-native-safe-area-context`.
 *
 * @returns Navigation bar positional rendering mode. Returns `relative` on unsupported platforms (iOS, web).
 * @deprecated Due to Android edge-to-edge enforcement, getting the navigation bar position is deprecated and always returns `relative`. This will be removed in a future release.
 *
 * @example
 * ```ts
 * await NavigationBar.unstable_getPositionAsync()
 * ```
 */
export declare function unstable_getPositionAsync(): Promise<NavigationBarPosition>;
/**
 * Sets the behavior of the status bar and navigation bar when they are hidden and the user wants to reveal them.
 *
 * For example, if the navigation bar is hidden (`setVisibilityAsync(false)`) and the behavior
 * is `'overlay-swipe'`, the user can swipe from the bottom of the screen to temporarily reveal the navigation bar.
 *
 * - `'overlay-swipe'`: Temporarily reveals the System UI after a swipe gesture (bottom or top) without insetting your App's content.
 * - `'inset-swipe'`: Reveals the System UI after a swipe gesture (bottom or top) and insets your App's content (Safe Area). The System UI is visible until you explicitly hide it again.
 * - `'inset-touch'`: Reveals the System UI after a touch anywhere on the screen and insets your App's content (Safe Area). The System UI is visible until you explicitly hide it again.
 *
 * @param behavior Dictates the interaction behavior of the navigation bar.
 * @deprecated Due to Android edge-to-edge enforcement, setting the navigation bar behavior is deprecated and has no effect. This will be removed in a future release.
 *
 * @example
 * ```ts
 * await NavigationBar.setBehaviorAsync('overlay-swipe')
 * ```
 */
export declare function setBehaviorAsync(behavior: NavigationBarBehavior): Promise<void>;
/**
 * Gets the behavior of the status and navigation bars when the user swipes or touches the screen.
 *
 * @returns Navigation bar interaction behavior. Returns `inset-touch` on unsupported platforms (iOS, web).
 * @deprecated Due to Android edge-to-edge enforcement, getting the navigation bar behavior is deprecated and always returns `inset-touch`. This will be removed in a future release.
 *
 * @example
 * ```ts
 * await NavigationBar.getBehaviorAsync()
 * ```
 */
export declare function getBehaviorAsync(): Promise<NavigationBarBehavior>;
/**
 * Sets the style of the navigation bar.
 * > This will have an effect when the following conditions are met:
 * > - The `enforceContrast` option of the `expo-navigation-bar` plugin is set to `false`.
 * > - The device is using the three-button navigation bar.
 *
 * > Due to a bug in the Android 15 emulator this function may have no effect. Try a physical device or an emulator with a different version of Android.
 *
 * @platform android
 */
export declare function setStyle(style: NavigationBarStyle): void;
/**
 * React hook that statefully updates with the visibility of the system navigation bar.
 *
 * @returns Visibility of the navigation bar, `null` during async initialization.
 *
 * @example
 * ```ts
 * function App() {
 *   const visibility = NavigationBar.useVisibility()
 *   // React Component...
 * }
 * ```
 */
export declare function useVisibility(): NavigationBarVisibility | null;
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