Method setContentSize

packages/fairygui/src/scroll/ScrollPane.ts:481–488

* Set content size * 设置内容尺寸

(width: number, height: number)

     * 设置内容尺寸
     */
    public setContentSize(width: number, height: number): void {
        if (this._contentWidth === width && this._contentHeight === height) {
            return;
        }
        this._contentWidth = width;
        this._contentHeight = height;
        this.handleSizeChanged();
    }

    private handleSizeChanged(): void {
        if (this._scrollType === EScrollType.Horizontal || this._scrollType === EScrollType.Both) {