import type { CheckStrategy } from 'treemate';
import type { Key, TmNode, TreeOption } from './interface';
import { type ComputedRef } from 'vue';
export declare function useMergedCheckStrategy(props: {
    leafOnly: boolean;
    checkStrategy: CheckStrategy;
}): ComputedRef<CheckStrategy>;
export declare function isNodeDisabled(node: TmNode, disabledField: string): boolean;
export declare function keysWithFilter(nodes: TreeOption[], pattern: string, keyField: string, childrenField: string, filter: (pattern: string, node: TreeOption) => boolean): {
    expandedKeys: Key[];
    highlightKeySet: Set<Key>;
};
declare const emptyImage: HTMLImageElement | null;
export { emptyImage };
export declare function filterTree(tree: TreeOption[], filter: (pattern: string, v: TreeOption) => boolean, pattern: string, keyField: string, childrenField: string): {
    filteredTree: TreeOption[];
    expandedKeys: Key[];
    highlightKeySet: Set<Key>;
};
export declare function treeGetClickTarget(e: MouseEvent): 'checkbox' | 'switcher' | 'node';