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+<template>
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+ <div>
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+ <el-button @click="show">展示</el-button>
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+ <el-button @click="create">创建</el-button>
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+ <el-button @click="edit">编辑</el-button>
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+ <canvas id="editPolygon" width="800" height="400" tabindex="0" />
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+ </div>
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+</template>
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+<script lang='ts'>
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+import { SGraphItem, SGraphView, SGraphScene } from "@saga-web/graph/";
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+import { SMouseEvent } from "@saga-web/base/";
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+import {
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+ SColor,
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+ SLineCapStyle,
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+ SPainter,
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+ SPath2D,
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+ SPoint,
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+ SPolygonUtil,
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+ SRect,
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+ SLine
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+} from "@saga-web/draw";
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+import { SRelationState } from "@saga-web/big/lib/enums/SRelationState";
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+import { SMathUtil } from "@saga-web/big/lib/utils/SMathUtil";
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+
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+export default {
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+ data() {
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+ return {
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+ scene: null,
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+ view: null
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+ };
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+ },
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+ mounted(): void {
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+ this.view = new SGraphView("editPolygon");
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+ },
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+ methods: {
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+ show() {
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+ const scene = new SGraphScene();
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+ this.view.scene = scene;
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+ const spolygonItem = new SPolygonItem(null);
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+ spolygonItem.setStatus = SRelationState.Normal;
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+ const PointList: SPoint[] = [
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+ new SPoint(0, 0),
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+ new SPoint(50, 0),
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+ new SPoint(50, 50),
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+ new SPoint(0, 50)
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+ ];
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+ spolygonItem.setPointList = PointList;
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+ scene.addItem(spolygonItem);
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+ this.view.fitSceneToView();
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+ },
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+ create() {
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+ const scene = new SGraphScene();
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+ this.view.scene = scene;
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+ const spolygonItem = new SPolygonItem(null);
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+ spolygonItem.setStatus = SRelationState.Create;
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+ scene.addItem(spolygonItem);
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+ scene.grabItem = spolygonItem;
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+ this.view.fitSceneToView();
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+ },
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+ edit() {
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+ const scene = new SGraphScene();
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+ this.view.scene = scene;
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+ const spolygonItem = new SPolygonItem(null);
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+ spolygonItem.setStatus = SRelationState.Edit;
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+ const PointList: SPoint[] = [
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+ new SPoint(0, 0),
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+ new SPoint(50, 0),
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+ new SPoint(50, 60),
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+ new SPoint(0, 50)
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+ ];
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+ spolygonItem.setPointList = PointList;
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+ scene.addItem(spolygonItem);
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+ scene.grabItem = spolygonItem;
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+ this.view.fitSceneToView();
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+ }
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+ }
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+};
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+
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+/**
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+ * @author hanyaolong
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+ */
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+
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+class SPolygonItem extends SGraphItem {
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+ /** X坐标最小值 */
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+ private minX = Number.MAX_SAFE_INTEGER;
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+ /** X坐标最大值 */
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+ private maxX = Number.MIN_SAFE_INTEGER;
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+ /** Y坐标最小值 */
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+ private minY = Number.MAX_SAFE_INTEGER;
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+ /** Y坐标最大值 */
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+ private maxY = Number.MIN_SAFE_INTEGER;
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+ /** 轮廓线坐标 */
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+ private pointList: SPoint[] = [];
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+ // 获取当前状态
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+ get getPointList(): SPoint[] {
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+ return this.pointList;
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+ }
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+ // 编辑当前状态
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+ set setPointList(arr: SPoint[]) {
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+ this.pointList = arr;
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+ if (arr) {
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+ this._xyzListToSPointList(arr);
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+ }
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+ this.update();
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+ }
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+ /** 是否闭合 */
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+ closeFlag: boolean = false;
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+ // 当前状态 1:show 2 创建中,3 编辑中
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+ _status: number = SRelationState.Normal;
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+ // 获取当前状态
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+ get getStatus(): number {
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+ return this._status;
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+ }
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+ // 编辑当前状态
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+ set setStatus(value: number) {
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+ this._status = value;
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+ this.update();
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+ }
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+ /** 边框颜色 */
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+ borderColor: SColor = new SColor("#0091FF");
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+ /** 填充颜色 */
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+ brushColor: SColor = new SColor("#1EE887");
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+ /** border宽 只可输入像素宽*/
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+ borderLine: number = 4;
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+ /** 鼠标移动点 */
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+ private lastPoint = new SPoint();
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+ /** 当前鼠标获取顶点对应索引 */
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+ private curIndex: number = -1;
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+ /** 灵敏像素 */
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+ private len: number = 15;
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+ /** 场景像素 */
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+ private scenceLen: number = 15;
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+ /** 场景像素 */
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+ private isAlt: boolean = false;
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+
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+ /**
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+ * 构造函数
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+ *
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+ * @param parent 指向父对象
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+ */
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+
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+ constructor(parent: SGraphItem | null) {
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+ super(parent);
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+ }
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+
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+ ///////////////以下为对pointList 数组的操作方法
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+
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+ /**
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+ * 储存新的多边形顶点
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+ * @param x 点位得x坐标
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+ * @param y 点位得y坐标
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+ * @param i 储存所在索引
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+ * @return SPoint
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+ */
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+
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+ insertPoint(x: number, y: number, i: number | null = null): SPoint {
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+ const point = new SPoint(x, y);
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+ if (i == null) {
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+ this.pointList.push(point);
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+ } else {
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+ this.pointList.splice(i, 0, point);
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+ }
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+ this.update();
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+ return point;
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+ }
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+
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+ /**
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+ * 删除点位
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+ * @param i 删除点所在的索引
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+ * @return SPoint
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+ */
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+
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+ deletePoint(i: number | null = null): SPoint | null | undefined {
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+ let point = null;
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+ if (i != null) {
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+ if (this.pointList.length - 1 >= i) {
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+ point = this.pointList[i];
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+ this.pointList.splice(i, 1);
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+ } else {
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+ point = null;
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+ }
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+ } else {
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+ point = this.pointList.pop();
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+ }
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+ this.update();
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+ return point;
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+ }
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+
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+ /**
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+ * 多边形顶点的移动位置
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+ * @param x 点位得x坐标
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+ * @param y 点位得y坐标
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+ * @param i 点位得i坐标
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+ * @return SPoint
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+ */
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+
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+ movePoint(x: number, y: number, i: number): SPoint | null | undefined {
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+ let point = null;
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+ if (this.pointList.length) {
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+ this.pointList[i].x = x;
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+ this.pointList[i].y = y;
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+ }
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+ point = this.pointList[i];
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+ return point;
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+ }
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+
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+ /**
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+ * 打印出多边形数组
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+ * @return SPoint[]
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+ */
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+
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+ PrintPointList(): SPoint[] {
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+ return this.pointList;
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+ }
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+
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+ ///////////////////////////
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+
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+ /**
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+ * xyz数据转换为SPoint格式函数;获取外接矩阵参数
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+ *
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+ * @param arr 外层传入的数据PointList
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+ */
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+
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+ protected _xyzListToSPointList(arr: SPoint[]): void {
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+ if (arr.length) {
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+ this.pointList = arr.map(it => {
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+ let x = it.x,
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+ y = it.y;
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+ if (x < this.minX) {
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+ this.minX = x;
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+ }
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+ if (y < this.minY) {
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+ this.minY = y;
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+ }
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+ if (x > this.maxX) {
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+ this.maxX = x;
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+ }
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+ if (y > this.maxY) {
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+ this.maxY = y;
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+ }
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+ return new SPoint(x, y);
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+ });
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+ } else {
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+ this.pointList = [];
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+ }
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+ }
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+
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+ ////////////以下为三种状态下的绘制多边形方法
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+
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+ /**
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+ * 展示状态 --绘制多边形数组
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+ * @param painter 绘制类
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+ * @param pointList 绘制多边形数组
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+ *
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+ */
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+
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+ protected drawShowPolygon(painter: SPainter, pointList: SPoint[]): void {
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+ painter.pen.lineCapStyle = SLineCapStyle.Square;
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+ painter.pen.color = this.borderColor;
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+ painter.pen.lineWidth = painter.toPx(this.borderLine);
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+ painter.brush.color = this.brushColor;
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+ painter.drawPolygon([...pointList]);
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+ }
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+
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+ /**
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+ *
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+ * 创建状态 --绘制多边形数组
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+ * @param painter 绘制类
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+ * @param pointList 绘制多边形数组
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+ *
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+ */
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+
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+ protected drawCreatePolygon(painter: SPainter, pointList: SPoint[]): void {
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+ painter.pen.lineCapStyle = SLineCapStyle.Square;
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+ painter.pen.color = this.borderColor;
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+ painter.pen.lineWidth = painter.toPx(4);
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+ painter.drawPolyline(pointList);
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+ if (this.lastPoint) {
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+ painter.drawLine(pointList[pointList.length - 1], this.lastPoint);
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+ }
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+ painter.pen.color = SColor.Transparent;
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+ painter.brush.color = this.brushColor;
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+ painter.pen.lineWidth = painter.toPx(4);
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+ painter.drawPolygon([...pointList, this.lastPoint]);
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+ }
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+
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+ /**
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+ *
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+ * 编辑状态 --绘制多边形数组
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+ *
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+ * @param painter 绘制类
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+ * @param pointList 绘制多边形数组
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+ *
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+ * */
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+
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+ protected drawEditPolygon(painter: SPainter, pointList: SPoint[]): void {
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+ // 展示多边形
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+ this.drawShowPolygon(painter, pointList);
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+ // 绘制顶点块
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+ pointList.forEach((item, index) => {
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+ painter.drawCircle(item.x, item.y, painter.toPx(8));
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+ });
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+ }
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+
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+ ////////////////////////////////
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+
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+ /**
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+ * 编辑状态操作多边形数组
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+ *
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+ * @param event 鼠标事件
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+ *
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+ *
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+ * */
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+
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+ protected editPolygonPoint(event: SMouseEvent): void {
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+ // 判断是否为删除状态 isAlt = true为删除状态
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+ if (this.isAlt) {
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+ // 1 判断是否点击在多边形顶点
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+ let lenIndex = -1; // 当前点击到的点位索引;
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+ let curenLen = this.scenceLen; // 当前的灵敏度
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+ this.pointList.forEach((item, index) => {
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+ let dis = SMathUtil.pointDistance(event.x, event.y, item.x, item.y);
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+ if (dis < curenLen) {
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+ curenLen = dis;
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+ lenIndex = index;
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+ }
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+ });
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+ // 若点击到,对该索引对应的点做删除
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+ if (lenIndex != -1) {
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+ if (this.pointList.length <= 3) {
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+ return;
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+ }
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+ this.deletePoint(lenIndex);
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+ }
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+ } else {
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+ // 1 判断是否点击在多边形顶点
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+ this.curIndex = -1;
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+ let lenIndex = -1; // 当前点击到的点位索引;
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+ let curenLen = this.scenceLen; // 当前的灵敏度
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+ this.pointList.forEach((item, index) => {
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+ let dis = SMathUtil.pointDistance(event.x, event.y, item.x, item.y);
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+ if (dis < curenLen) {
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+ curenLen = dis;
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+ lenIndex = index;
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+ }
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+ });
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+ this.curIndex = lenIndex;
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+
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+ // 2判断是否点击在多边形得边上
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+ if (-1 == lenIndex) {
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+ let len = SMathUtil.pointToLine(
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+ new SPoint(event.x, event.y),
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+ new SLine(this.pointList[0], this.pointList[1])
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+ ),
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+ index = 0;
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+ if (this.pointList.length > 2) {
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+ for (let i = 1; i < this.pointList.length; i++) {
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+ let dis = SMathUtil.pointToLine(
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+ new SPoint(event.x, event.y),
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+ new SLine(this.pointList[i], this.pointList[i + 1])
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+ );
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+ if (i + 1 == this.pointList.length) {
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+ dis = SMathUtil.pointToLine(
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+ new SPoint(event.x, event.y),
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+ new SLine(this.pointList[i], this.pointList[0])
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+ );
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+ }
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+ if (dis.MinDis < len.MinDis) {
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+ len = dis;
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+ index = i;
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+ }
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+ }
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+ }
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+ // 如果再线上则为新增点
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+ if (len.Point) {
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+ if (len.MinDis <= this.scenceLen) {
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+ this.pointList.splice(index + 1, 0, len.Point);
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+ }
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+ }
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+ }
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+ // 刷新视图
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+ this.update();
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+ }
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+ }
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+
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+ ///////////////////////////////以下为鼠标事件
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+
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+ /**
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+ * 鼠标双击事件
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+ *
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+ * @param event 事件参数
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+ * @return boolean
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+ */
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+
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+ onDoubleClick(event: SMouseEvent): boolean {
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+ // 如果位show状态 双击改对象则需改为编辑状态
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+ if (SRelationState.Normal == this._status) {
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+ this._status = SRelationState.Edit;
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+ } else if (SRelationState.Edit == this._status) {
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+ this._status = SRelationState.Normal;
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+ }
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+ this.update();
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+ return true;
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+ } // Function onDoubleClick()
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+
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+ /**
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+ * 键盘事件
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+ *
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+ * @param event 事件参数
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+ * @return boolean
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+ */
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+
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+ onKeyDown(event: KeyboardEvent): boolean {
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+ console.log(event);
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+ if (this._status == SRelationState.Normal) {
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+ return false;
|
|
|
+ } else if (this._status == SRelationState.Create) {
|
|
|
+ if (event.code == "Enter") {
|
|
|
+ this._status = SRelationState.Normal;
|
|
|
+ }
|
|
|
+ } else if (this._status == SRelationState.Edit) {
|
|
|
+ if (event.key == "Alt") {
|
|
|
+ this.isAlt = true;
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ }
|
|
|
+ this.update();
|
|
|
+ return true;
|
|
|
+ } // Function onKeyDown()
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 键盘键抬起事件
|
|
|
+ *
|
|
|
+ * @param event 事件参数
|
|
|
+ * @return boolean
|
|
|
+ */
|
|
|
+ onKeyUp(event: KeyboardEvent): boolean {
|
|
|
+ if (this._status == SRelationState.Edit) {
|
|
|
+ if (event.key == "Alt") {
|
|
|
+ this.isAlt = false;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ this.update();
|
|
|
+ return true;
|
|
|
+ } // Function onKeyUp()
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 鼠标按下事件
|
|
|
+ *
|
|
|
+ * @param event 事件参数
|
|
|
+ * @return boolean
|
|
|
+ */
|
|
|
+ onMouseDown(event: SMouseEvent): boolean {
|
|
|
+ console.log("aaaaaa");
|
|
|
+ // 如果状态为编辑状态则添加点
|
|
|
+ if (this._status == SRelationState.Create) {
|
|
|
+ // 新增顶点
|
|
|
+ this.insertPoint(event.x, event.y);
|
|
|
+ } else if (this._status == SRelationState.Edit) {
|
|
|
+ // 对多边形数组做编辑操作
|
|
|
+ this.editPolygonPoint(event);
|
|
|
+ }
|
|
|
+ return true;
|
|
|
+ } // Function onMouseDown()
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 鼠标移入事件
|
|
|
+ *
|
|
|
+ * @param event 事件参数
|
|
|
+ * @return boolean
|
|
|
+ */
|
|
|
+ onMouseEnter(event: SMouseEvent): boolean {
|
|
|
+ return true;
|
|
|
+ } // Function onMouseEnter()
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 鼠标移出事件
|
|
|
+ *
|
|
|
+ * @param event 事件参数
|
|
|
+ * @return boolean
|
|
|
+ */
|
|
|
+
|
|
|
+ onMouseLeave(event: SMouseEvent): boolean {
|
|
|
+ return true;
|
|
|
+ } // Function onMouseLeave()
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 鼠标移动事件
|
|
|
+ *
|
|
|
+ * @param event 事件参数
|
|
|
+ * @return boolean
|
|
|
+ */
|
|
|
+
|
|
|
+ onMouseMove(event: SMouseEvent): boolean {
|
|
|
+ if (this._status == SRelationState.Create) {
|
|
|
+ this.lastPoint.x = event.x;
|
|
|
+ this.lastPoint.y = event.y;
|
|
|
+ } else if (this._status == SRelationState.Edit) {
|
|
|
+ if (-1 != this.curIndex) {
|
|
|
+ this.pointList[this.curIndex].x = event.x;
|
|
|
+ this.pointList[this.curIndex].y = event.y;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ this.update();
|
|
|
+ return true;
|
|
|
+ } // Function onMouseMove()
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 鼠标抬起事件
|
|
|
+ *
|
|
|
+ * @param event 事件参数
|
|
|
+ * @return boolean
|
|
|
+ */
|
|
|
+
|
|
|
+ onMouseUp(event: SMouseEvent): boolean {
|
|
|
+ if (this._status == SRelationState.Edit) {
|
|
|
+ this.curIndex = -1;
|
|
|
+ }
|
|
|
+ return true;
|
|
|
+ } // Function onMouseUp()
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 适配事件
|
|
|
+ *
|
|
|
+ * @param event 事件参数
|
|
|
+ * @return boolean
|
|
|
+ */
|
|
|
+
|
|
|
+ onResize(event: SMouseEvent): boolean {
|
|
|
+ return true;
|
|
|
+ } // Function onResize()
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Item对象边界区域
|
|
|
+ *
|
|
|
+ * @return SRect
|
|
|
+ */
|
|
|
+ boundingRect(): SRect {
|
|
|
+ return new SRect(
|
|
|
+ this.minX,
|
|
|
+ this.minY,
|
|
|
+ this.maxX - this.minX,
|
|
|
+ this.maxY - this.minY
|
|
|
+ );
|
|
|
+ } // Function boundingRect()
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Item绘制操作
|
|
|
+ *
|
|
|
+ * @param painter painter对象
|
|
|
+ */
|
|
|
+
|
|
|
+ onDraw(painter: SPainter): void {
|
|
|
+ this.scenceLen = painter.toPx(this.len);
|
|
|
+ // 当状态为展示状态
|
|
|
+ if (this._status == SRelationState.Normal) {
|
|
|
+ // 闭合多边形
|
|
|
+ this.drawShowPolygon(painter, this.pointList);
|
|
|
+ } else if (this._status == SRelationState.Create) {
|
|
|
+ // 创建状态
|
|
|
+ this.drawCreatePolygon(painter, this.pointList);
|
|
|
+ } else {
|
|
|
+ // 编辑状态
|
|
|
+ this.drawEditPolygon(painter, this.pointList);
|
|
|
+ }
|
|
|
+ } // Function onDraw()
|
|
|
+}
|
|
|
+</script>
|