import { ITreeNode, IFlatTreeNode, IViewport } from '../lib/tree-utils';
export type TreeViewSelectionMode = 'none' | 'single' | 'multiple';
export type TreeViewState<T = Record<string, unknown>> = {
    data: ITreeNode<T>[];
    selectionMode: TreeViewSelectionMode;
    flatNodes: IFlatTreeNode<T>[];
    focusedId: string | undefined;
    expandedIds: ReadonlySet<string>;
    selectedIds: ReadonlySet<string>;
    loadingIds: ReadonlySet<string>;
    visibleNodeCount: number;
    viewport: IViewport;
};
export type TreeViewAction<T = Record<string, unknown>> = {
    type: 'focus-next';
} | {
    type: 'focus-previous';
} | {
    type: 'focus-first';
} | {
    type: 'focus-last';
} | {
    type: 'expand';
} | {
    type: 'collapse';
} | {
    type: 'toggle-expand';
} | {
    type: 'expand-all';
} | {
    type: 'collapse-all';
} | {
    type: 'select';
} | {
    type: 'focus-parent';
} | {
    type: 'focus-first-child';
} | {
    type: 'set-loading';
    nodeId: string;
    isLoading: boolean;
} | {
    type: 'set-children';
    nodeId: string;
    children: ITreeNode<T>[];
} | {
    type: 'expand-node';
    nodeId: string;
} | {
    type: 'collapse-node';
    nodeId: string;
} | {
    type: 'reset';
    state: TreeViewState<T>;
};
export declare function treeViewReducer<T>(state: TreeViewState<T>, action: TreeViewAction<T>): TreeViewState<T>;
export declare function createDefaultTreeViewState<T>(options: {
    data: ITreeNode<T>[];
    selectionMode?: TreeViewSelectionMode;
    defaultExpanded?: ReadonlySet<string> | 'all';
    defaultSelected?: ReadonlySet<string>;
    visibleNodeCount?: number;
}): TreeViewState<T>;
//# sourceMappingURL=tree-view.d.ts.map