import { WidgetBaseHandler } from './WidgetBaseHandler';
export declare class TimeDiffHandler extends WidgetBaseHandler {
    layout(): void;
    private resolveLabel;
    private calcTimeDiffLabel;
    private shouldUsePlaceholder;
    /** 按当前格式生成占位，如 --天--时--分--秒 */
    private formatPlaceholder;
    private resolveTimeMs;
    private buildValuePath;
    /**
     * 解析字段父路径：布局时优先用当前单元格 subRenderer（二维表交叉/横向/纵向、动态表等），
     * 与 InsertField / LayoutContext.getValuePath 行为一致。
     */
    private resolveFieldParentKey;
    private formatDiff;
}
