import { ImageSourcePropType } from 'react-native';
import { LogoHeaderConfig } from '../common/DeveloperConfig';
export declare const emitOptionsChanged: (options: LogoHeaderOptions) => void;
export declare const emitRestoreDefaults: () => void;
export declare const useHandleOptionEvents: (setOptions: (args: LogoHeaderOptions) => void, defaultOptions: LogoHeaderOptions) => void;
/**
 * Listens to react-navigation events and in turn emits LogoHeader events
 * to set the header options per screen at the developerConfig level.
 *
 * Pass into screenListeners prop for a <Stack.Navigator/>
 */
export declare const navigationScreenListeners: (headerOptions?: LogoHeaderConfig) => {
    focus: (e: any) => void;
    blur: () => void;
};
/**
 * Setup LogoHeader emitters on a single screen to pass in custom options.
 * Most the time a combination of navigationScreenListeners and developConfig
 * should be sufficient but this is probably useful in advanced cases where the
 * developerConfig does not have enough context.
 */
export declare const useEmitLogoHeaderOptions: (newOptions: LogoHeaderOptions) => void;
export type LogoHeaderOptions = {
    visible?: boolean;
    imageSource?: ImageSourcePropType;
    item?: JSX.Element;
    alignImage?: `${number}%`;
    alignItem?: `${number}%`;
};