export class PageModeAreaParameter { private _width: number; private _height: number; private _x: number = 0; private _y: number = 0; get width(): number { return this._width; } get height(): number { return this._height; } get x(): number { return this._x; } get y(): number { return this._y; } constructor(width: number, height: number) { this._width = width; this._height = height; } setX(x: number): PageModeAreaParameter { this._x = x; return this; } setY(y: number): PageModeAreaParameter { this._y = y; return this; } }