import { Component } from "./Component";
/**
 * 控制布局
 * 当添加了控制布局组件后，原本的position、size和scale可能会被自动管控手动设置将不会生效
 * ```ts
 * const node = GameObject.instantiate(Group, parent, {
 *   width: 100,
 *   height: 100,
 *   anchorX: 0.5,
 *   anchorY: 0.5,
 * });
 * node.addComponent(Layout, { centerX: 0, centerY: 0 });
 * ```
 */
export declare class Layout extends Component {
    private preferredWidth;
    private preferredHeight;
    private _markResize;
    private _active;
    private _applyingLayout;
    private resizeLater;
    private handleAdded;
    private handleRemoved;
    private handleParentResize;
    private handleSelfResize;
    private _left?;
    /**
     * 相对左边的距离
     */
    get left(): number | undefined;
    set left(val: number | undefined);
    private _top?;
    /**
     * 相对顶部的距离
     */
    get top(): number | undefined;
    set top(val: number | undefined);
    private _right?;
    /**
     * 相对右边的距离
     */
    get right(): number | undefined;
    set right(val: number | undefined);
    private _bottom?;
    /**
     * 相对底部的距离
     */
    get bottom(): number | undefined;
    set bottom(val: number | undefined);
    private _centerX?;
    /**
     * 水平居中偏移。
     * left 和 right 将失效
     * 注意：如果要让节点真正实现水平居中，需要设置 `anchorX`
     * ```ts
     * const node = GameObject.instantiate(Group, parent, { anchorX: 0.5 });
     * node.addComponent(Layout, { centerX: 0 });
     * ```
     */
    get centerX(): number | undefined;
    set centerX(val: number | undefined);
    /**
     * @deprecated 使用 `centerX`。旧命名保留用于兼容。
     */
    get vertical(): number | undefined;
    set vertical(val: number | undefined);
    private _centerY?;
    /**
     * 垂直居中偏移。
     * top 和 bottom 将失效
     * 注意：如果要让节点真正实现垂直居中，需要设置 `anchorY`
     * ```ts
     * const node = GameObject.instantiate(Group, parent, { anchorY: 0.5 });
     * node.addComponent(Layout, { centerY: 0 });
     * ```
     */
    get centerY(): number | undefined;
    set centerY(val: number | undefined);
    /**
     * @deprecated 使用 `centerY`。旧命名保留用于兼容。
     */
    get horizontal(): number | undefined;
    set horizontal(val: number | undefined);
    private _minWidth;
    get minWidth(): number;
    set minWidth(val: number);
    private _minHeight;
    get minHeight(): number;
    set minHeight(val: number);
    awake(): void;
    private markResize;
    /**
     * 当挂载节点尺寸发生变化，且需要重新动态计算时调用
     * 将保存当前组件的位置和大小状态
     */
    saveNewSize(): void;
    private savePreferredSize;
    private clampWidth;
    private clampHeight;
    /**
     * 重新计算布局/矫正布局
     * ```ts
     * const node = new Transform();
     * const layout = node.addComponent(Layout);
     * node.anchor.set(0.5, 0.5);
     * layout.resize();
     * ```
     */
    /**
     * 矫正布局
     */
    resize(): void;
    onDestroy(): void;
}