sagacloud-web/saga-web-draw/src/SBrush.ts

import { SBrushType } from "./enums/SBrushType";
import { SColor, SGradient } from "./";

/**
 * 画刷
 *
 * @author  庞利祥(sybotan@126.com)
 */
export class SBrush {
    /** 画笔类型 */
    type: SBrushType = SBrushType.Color;

    /** 画刷颜色 */
    private _color = SColor.Black;
    get color(): SColor {
        return this._color;
    } // Get color
    set color(value: SColor) {
        this.type = SBrushType.Color;
        this._color = value;
    } // Set color

    /** 画刷渐变 */
    private _gradient: SGradient | null = null;
    get gradient(): SGradient | null {
        return this._gradient;
    } // Get gradient
    set gradient(value: SGradient | null) {
        this._gradient = value;
        this.type = SBrushType.Gradient;
    } // Set gradient

    /**
     * 构造函数
     */
    constructor();

    /**
     * 构造函数
     *
     * @param   brush       画刷
     */
    constructor(brush: SBrush);

    /**
     * 构造函数
     *
     * @param   color       颜色
     */
    constructor(color: SColor);

    /**
     * 构造函数
     *
     * @param   gradient    过渡
     */
    constructor(gradient: SGradient);

    /**
     * 构造函数（重载实现）
     *
     * @param   brush       画笔
     */
    constructor(brush?: SColor | SGradient | SBrush) {
        if (brush == undefined) {
            return;
        }

        // 如果是渐变类型
        if (brush instanceof SGradient) {
            this.gradient = brush;
        } else if (brush instanceof SBrush) {
            this.type = brush.type;
            this.color = new SColor(brush.color);
        } else {
            this.color = new SColor(brush);
        }
    } // Constructor()
} // Class SBrush