import React from 'react';
/**
 * 图片展示控件。
 */
export interface ImageSchema {
    /**
     * 指定为图片展示类型
     */
    type: 'image' | 'static-image';
    /**
     * 默认图片地址
     */
    defaultImage?: string;
    /**
     * 图片标题
     */
    title?: string;
    /**
     * 关联字段名，也可以直接配置 src
     */
    name?: string;
    /**
     * 图片描述信息
     */
    imageCaption?: string;
    /**
     * 图片地址，如果配置了 name，这个属性不用配置。
     */
    src?: string;
    /**
     * 大图地址，不设置用 src
     */
    originalSrc?: string;
    /**
     * 是否启动放大功能。
     */
    enlargeAble?: boolean;
    /**
     * 是否显示尺寸。
     */
    showDimensions?: boolean;
    /**
     * 图片无法显示时的替换文本
     */
    alt?: string;
    /**
     * 高度
     */
    height?: number;
    /**
     * 宽度
     */
    width?: number;
    /**
     * 图片 css 类名
     */
    imageClassName?: string;
    /**
     * 外层 css 类名
     */
    className?: string;
    /**
     * 图片缩率图外层 css 类名
     */
    thumbClassName?: string;
    caption?: string;
    /**
     * 预览图模式
     */
    thumbMode?: 'w-full' | 'h-full' | 'contain' | 'cover';
    /**
     * 预览图比率
     */
    thumbRatio?: '1:1' | '4:3' | '16:9';
}
export interface ImageThumbProps extends Omit<ImageSchema, 'type' | 'className'> {
    onEnlarge?: (info: ImageThumbProps) => void;
    index?: number;
    onLoad?: React.EventHandler<any>;
    overlays?: JSX.Element;
    className?: string;
}
export declare class ImageThumb extends React.Component<ImageThumbProps> {
    static contextType?: React.Context<any> | undefined;
    handleEnlarge(): void;
    render(): JSX.Element;
}
declare const ThemedImageThumb: typeof ImageThumb;
export default ThemedImageThumb;
export declare const imagePlaceholder = "data:image/png;base64,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";
export interface ImageFieldProps extends ImageSchema {
    className?: string;
    imageClassName?: string;
    placeholder: string;
    description?: string;
    enlargeTitle?: string;
    enlargeCaption?: string;
    thumbMode: 'w-full' | 'h-full' | 'contain' | 'cover';
    thumbRatio: '1:1' | '4:3' | '16:9';
    originalSrc?: string;
    enlargeAble?: boolean;
    name?: string;
    onImageEnlarge?: (info: {
        src: string;
        originalSrc: string;
        title?: string;
        caption?: string;
        thumbMode?: 'w-full' | 'h-full' | 'contain' | 'cover';
        thumbRatio?: '1:1' | '4:3' | '16:9';
    }, target: any) => void;
    showDimensions?: boolean;
}
export declare class ImageField extends React.Component<ImageFieldProps, object> {
    static defaultProps: Pick<ImageFieldProps, 'defaultImage' | 'thumbMode' | 'thumbRatio' | 'placeholder'>;
    handleEnlarge({ src, originalSrc, title, caption, thumbMode, thumbRatio }: ImageThumbProps): void;
    render(): JSX.Element;
}
export declare class ImageFieldRenderer extends ImageField {
}