export interface KeyFilterEvent {
    key: string;
    ctrlKey: boolean;
    metaKey: boolean;
    altKey: boolean;
    currentValue?: string;
    selectionStart?: number;
}
export interface KeyFilterRule {
    pattern?: RegExp;
    key?: string;
    validate?: (e: KeyFilterEvent) => boolean;
    description?: string;
}
export type KeyFilter = (e: KeyFilterEvent) => boolean;
export declare const createKeyFilter: (rules: KeyFilterRule[]) => KeyFilter;
export declare const DEFAULT_NUMERIC_RULES: KeyFilterRule[];
export declare const createNumericKeyFilter: (extraRules?: KeyFilterRule[]) => KeyFilter;
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