import { CSSProperties, ReactNode, ReactElement, DragEvent, PropsWithChildren } from 'react';
import TreeNode from './node';
import { AvailableVirtualListProps } from '../_class/VirtualList';
export declare type NodeInstance = ReactElement<PropsWithChildren<NodeProps>, typeof TreeNode>;
export declare type SHOW_ALL = 'all';
export declare type SHOW_PARENT = 'parent';
export declare type SHOW_CHILD = 'child';
export declare type ActionOnClick = 'select' | 'check' | 'expand';
export interface TreeState {
    treeData?: TreeProps['treeData'];
    nodeList?: NodeProps[];
    shouldUpdate?: boolean;
    selectedKeys?: string[];
    checkedKeys?: string[];
    expandedKeys?: string[];
    loadedKeys?: string[];
    loadingKeys?: string[];
    halfCheckedKeys?: string[];
    currentExpandKeys?: string[];
}
export declare type FieldNamesType = {
    key?: string;
    title?: string;
    disabled?: string;
    children?: string;
    isLeaf?: string;
    disableCheckbox?: string;
    checkable?: string;
};
export declare type TreeDataType = NodeProps & {
    key?: string;
    _index?: number;
    children?: TreeDataType[];
    [key: string]: any;
};
export declare type AllowDrop = (options: {
    dropNode: NodeInstance;
    dragNode: NodeInstance | null;
    dropPosition: number;
}) => boolean;
/**
 * @title Tree
 */
export interface TreeProps {
    style?: CSSProperties;
    className?: string | string[];
    height?: number;
    /**
     * @zh 不同尺寸
     * @en To set size
     */
    size?: 'mini' | 'small' | 'default' | 'large';
    /**
     * @zh 是否节点占据一行
     * @en Whether to occupy the remaining horizontal space
     */
    blockNode?: boolean;
    /**
     * @zh 是否自动展开父节点
     * @en Whether to automatically expand the parent node
     * @defaultValue true
     */
    autoExpandParent?: boolean;
    /**
     * @zh 是否支持多选
     * @en Whether to support multiple selection
     */
    multiple?: boolean;
    /**
     * @zh 是否在节点前添加选框
     * @en Whether to add a checkbox before the node
     */
    checkable?: boolean;
    /**
     * @zh 是否可拖拽
     * @en Whether the node can be dragged
     */
    draggable?: boolean;
    /**
     * @zh 是否允许拖拽时放置在该节点。 (`dragNode` in `2.23.0`)
     * @en Whether to allow dropping on node. (`dragNode` in `2.23.0`)
     * @defaultValue () => true
     * @version 2.7.0
     */
    allowDrop?: AllowDrop;
    /**
     * @zh 是否可以选择
     * @en Whether can be selected
     * @defaultValue true
     */
    selectable?: boolean;
    /**
     * @zh 是否取消父子节点关联
     * @en Whether to cancel the parent-child association
     */
    checkStrictly?: boolean;
    /**
     * @zh
     * 定制回填方式 <br/> all: 返回所有选中的节点  <br/> parent: 父子节点都选中时只返回父节点 <br/> child: 只返回子节点
     * @en
     * Customize the return value <br/> all: Return all selected nodes  <br/> parent:
     * Only return the parent node when both parent and child nodes are selected <br/> child: Return only child nodes
     * @defaultValue all
     */
    checkedStrategy?: SHOW_ALL | SHOW_PARENT | SHOW_CHILD;
    /**
     * @zh 默认选中的树节点
     * @en The key of node selected by default
     */
    defaultSelectedKeys?: string[];
    /**
     * @zh 选中的树节点。（受控）
     * @en The key of the selected node(controlled)
     */
    selectedKeys?: string[];
    /**
     * @zh 默认选中复选框的树节点
     * @en The key of node checked by default
     */
    defaultCheckedKeys?: string[];
    /**
     * @zh 选中复选框的树节点。（受控）
     * @en The key of the checked node(controlled)
     */
    checkedKeys?: string[];
    /**
     * @zh 半选状态的节点.仅在 checkable 且 checkStrictly 时生效
     * @en the keys of half checked
     * @version 2.27.0
     */
    halfCheckedKeys?: string[];
    /**
     * @zh 默认展开的节点。
     * @en The key of node expanded by default
     */
    defaultExpandedKeys?: string[];
    /**
     * @zh 展开的节点，(受控)。
     * @en The key of the expanded node (controlled)
     */
    expandedKeys?: string[];
    /**
     * @zh 可以通过传入`treeData`,生成对应的树结构
     * @en The tree structure can be generated by passing in `treeData`
     */
    treeData?: TreeDataType[];
    /**
     * @zh 指定 key，title，isLeaf，disabled，children 对应的字段
     * @en Custom field name for key, title, isLeaf, disabled and children
     * @version 2.11.0
     */
    fieldNames?: FieldNamesType;
    /**
     * @zh 定制节点图标
     * @en Customize node icon
     * @defaultValue FieldNamesType
     * @version 2.9.0
     */
    icons?: ((nodeProps: NodeProps) => {
        dragIcon?: ReactNode;
        switcherIcon?: ReactNode;
        loadingIcon?: ReactNode;
    }) | {
        dragIcon?: ReactNode;
        switcherIcon?: ReactNode;
        loadingIcon?: ReactNode;
    };
    /**
     * @zh 传递虚拟列表属性，传入此参数以开启虚拟滚动
     * @en Pass the virtual-list properties, pass in this parameter to turn on virtual scrolling
     * @version 2.11.0
     */
    virtualListProps?: AvailableVirtualListProps;
    /**
     * @zh 渲染额外节点
     * @en Render additional node
     */
    renderExtra?: (props: NodeProps) => ReactNode;
    /**
     * @zh 自定义 title 的渲染
     * @en Customize title rendering
     */
    renderTitle?: (props: NodeProps) => ReactNode;
    /**
     * @zh 是否展示连接线
     * @en Whether to display the connection line
     */
    showLine?: boolean;
    /**
     * @zh 点击节点时对应的操作，可以是选中，复选选中，展开/收起
     * @en The action when click node
     * @version select
     */
    actionOnClick?: ActionOnClick | ActionOnClick[];
    /**
     * @zh 异步加载数据的回调，返回一个 `Promise`。
     * @en Callback when loaded data asynchronously, returning a `Promise`.
     */
    loadMore?: (node: NodeInstance) => Promise<void>;
    /**
     * @zh 点击树节点的回调
     * @en Callback when selected node
     */
    onSelect?: (selectedKeys: string[], extra: {
        selected: boolean;
        selectedNodes: NodeInstance[];
        node: NodeInstance;
        e: Event;
    }) => void;
    /**
     * @zh 点击树节点复选框的回调
     * @en Callback when checked node
     */
    onCheck?: (checkedKeys: string[], extra: {
        node: NodeInstance;
        checkedNodes: NodeInstance[];
        checked: boolean;
        halfCheckedKeys: string[];
        halfCheckedNodes: NodeInstance[];
        e: Event;
    }) => void;
    /**
     * @zh 点击展开/关闭的回调
     * @en Callback when expanded or collapsed node
     */
    onExpand?: (expandedKeys: string[], exra?: {
        expanded: boolean;
        node: NodeInstance;
        expandedNodes: NodeInstance[];
    }) => void;
    /**
     * @zh 节点开始拖拽的回调
     * @en Callback when the node starts dragging
     */
    onDragStart?: (e: DragEvent<HTMLSpanElement>, node: NodeInstance) => void;
    /**
     * @zh 节点结束拖拽的回调
     * @en Callback when the node ends drag
     */
    onDragEnd?: (e: DragEvent<HTMLSpanElement>, node: NodeInstance) => void;
    /**
     * @zh 节点被拖拽至可释放目标上时的回调
     * @en Callback when the node is dragged onto a valid target
     */
    onDragOver?: (e: DragEvent<HTMLSpanElement>, node: NodeInstance) => void;
    /**
     * @zh 节点离开可释放目标上时的回调
     * @en Callback when the node leaves a valid target
     */
    onDragLeave?: (e: DragEvent<HTMLSpanElement>, node: NodeInstance) => void;
    /**
     * @zh 节点在可释放目标上释放时的回调
     * @en Callback when the node is dropped on the valid target
     */
    onDrop?: (info: {
        e: DragEvent<HTMLSpanElement>;
        dragNode: NodeInstance | null;
        dropNode: NodeInstance | null;
        dropPosition: number;
    }) => void;
    filterNode?: (node: NodeProps) => boolean;
    children?: ReactNode;
    onMouseDown?: (e: any) => void;
}
/**
 * @title Tree.Node
 */
export interface NodeProps {
    style?: CSSProperties;
    className?: string | string[];
    blockNode?: boolean;
    /**
     * @zh 该节点显示的标题
     * @en Title for node
     */
    title?: string | ReactNode;
    /**
     * @zh 是否允许选中
     * @en Whether it can be selected
     * @defaultValue true
     */
    selectable?: boolean;
    /**
     * @zh 是否禁用节点
     * @en Whether to disable node
     */
    disabled?: boolean;
    /**
     * @zh 是否禁用复选框
     * @en Whether to disable check
     */
    disableCheckbox?: boolean;
    /**
     * @zh 该节点个性化显示的图标
     * @en Custom icon
     */
    icon?: ReactNode;
    /**
     * @zh 是否显示多选框
     * @en Whether to show checkbox
     */
    checkable?: boolean;
    /**
     * @zh 是否是叶子节点。动态加载时有效
     * @en Is it a leaf node. Effective when loading dynamically
     */
    isLeaf?: boolean;
    /**
     * @zh 定制节点图标，优先级高于 Tree。同时设置 Tree 上的 icons 属性时候，将会进行合并。
     * @en Customize node icons, it have higher priority than Tree. When the icons property on the Tree is set at the same time, will be merged.
     */
    icons?: TreeProps['icons'];
    /**
     * @zh 当前节点是否可拖拽
     * @en Whether the current node can be dragged
     */
    draggable?: boolean;
    showLine?: boolean;
    checked?: boolean;
    selected?: boolean;
    parentKey?: string;
    pathParentKeys?: string[];
    indeterminated?: boolean;
    _key?: string;
    _level?: number;
    _lineless?: boolean[];
    visible?: boolean;
    selectedKeys?: string[];
    checkedKeys?: string[];
    expandedKeys?: string[];
    loading?: boolean;
    loaded?: boolean;
    autoExpandParent?: boolean;
    expanded?: boolean;
    childrenData?: NodeProps[];
    dataRef?: TreeDataType;
    loadMore?: (node: NodeProps) => void;
}