sagacloud-web/saga-web-big/src/items/SRectSelectItem.ts

import { SGraphItem } from "@saga-web/graph/lib";
import { SPainter, SPoint, SRect } from "@saga-web/draw/lib";
import { SMouseEvent } from "@saga-web/base/lib";
import { ItemColor, ItemOrder } from "..";

/**
 * 矩形选择item
 *
 * @author  郝建龙
 */
export class SRectSelectItem extends SGraphItem {
    /** 起点  */
    startPoint: SPoint = new SPoint();
    /** 终点  */
    endPoint: SPoint = new SPoint();

    /**
     * 构造函数
     *
     * @param parent    指向父对象
     * @param point     起点数据
     */
    constructor(parent: SGraphItem | null, point: SPoint) {
        super(parent);
        this.startPoint = point;
        this.endPoint = new SPoint(point.x, point.y);
        this.update();
        this.zOrder = ItemOrder.rectSelectOrder;
    } // Constructor

    /**
     * Item对象边界区域
     *
     * @return SRect
     */
    boundingRect(): SRect {
        return new SRect(this.startPoint, this.endPoint);
    } // Function boundingRect()

    /**
     * 鼠标移动事件
     *
     * @param	event         事件参数
     * @return	boolean
     */
    onMouseMove(event: SMouseEvent): boolean {
        this.endPoint.x = event.x;
        this.endPoint.y = event.y;
        this.update();
        return true;
    } // Function onMouseMove()

    /**
     * Item绘制操作
     *
     * @param   painter       painter对象
     */
    onDraw(painter: SPainter): void {
        painter.pen.lineWidth = painter.toPx(2);
        painter.pen.color = ItemColor.rectSelectOutColor;
        painter.brush.color = ItemColor.rectSelectInColor;
        painter.drawRect(this.startPoint, this.endPoint);
    } // Function onDraw()
} // SRectSelectItem