import { SKeyCode, SMouseEvent, SUndoStack } from "@persagy-web/base/lib"; import { ItemOrder, SItemStatus } from "@persagy-web/big/lib"; import { SMathUtil } from "@persagy-web/big/lib/utils/SMathUtil"; import { SColor, SLine, SLineCapStyle, SPainter, SPoint, SPolygonUtil, SRect, SSize } from "@persagy-web/draw/lib"; import { SGraphItem, SGraphPointListDelete, SGraphPointListInsert, SGraphPointListUpdate, SGraphStyleItem, SLineStyle } from "@persagy-web/graph/lib"; export class DrawZoneItem extends SGraphStyleItem { /** X 坐标最小值 */ private minX = Number.MAX_SAFE_INTEGER; /** X 坐标最大值 */ private maxX = Number.MIN_SAFE_INTEGER; /** Y 坐标最小值 */ private minY = Number.MAX_SAFE_INTEGER; /** Y 坐标最大值 */ private maxY = Number.MIN_SAFE_INTEGER; /** 轮廓线坐标 */ pointList: SPoint[] = []; /** 当前状态 */ protected _status: number = SItemStatus.Normal; get status(): SItemStatus { return this._status; } set status(value: SItemStatus) { this._status = value; this.undoStack.clear(); this.update(); } /** 是否闭合 */ closeFlag: boolean = false; /** 鼠标移动点 */ private lastPoint: SPoint | null = null; /** 当前鼠标获取顶点对应索引 */ private curIndex: number = -1; /** 当前鼠标获取顶点对应坐标 */ private curPoint: null | SPoint = null; /** 灵敏像素 */ private len: number = 10; /** 场景像素内部将灵敏像素换算为场景实际距离 */ private scenceLen: number = 15; /** 场景像素 */ private isShift: boolean = false; /** undo/redo 堆栈 */ protected undoStack: SUndoStack = new SUndoStack(); /** * 构造函数 * * @param parent 指向父对象 * @param data 图例节点对象数据 */ constructor(parent: SGraphItem | null, data: any) { super(parent); this.zOrder = ItemOrder.polygonOrder; this.data = data; if (data instanceof Array) { this.pointList = data; } else { this.pointList.push(data); this.lastPoint = data; } this.showSelect = false; this.fillColor = new SColor('#2cd1f780') } ////////////////// // 以下为对pointList 数组的操作方法 /** * 储存新的多边形顶点 * * @param x 点位得 x 坐标 * @param y 点位得 y 坐标 * @param i 储存所在索引 * @return 添加的顶点 */ insertPoint(x: number, y: number, i: number | null = null): SPoint { const point = new SPoint(x, y); if (i == null) { this.pointList.push(point); } else { this.pointList.splice(i, 0, point); } this.update(); return point; } /** * 删除点位 * * @param i 删除点所在的索引 * @return 索引不在数组范围则返回 null */ deletePoint(i: number | null = null): SPoint | null { let point; if (i != null) { if (i >= this.pointList.length || i < 0) { point = null; } else { point = new SPoint(this.pointList[i].x, this.pointList[i].y); this.pointList.splice(i, 1); } } else { if (this.pointList.length) { point = this.pointList[this.pointList.length - 1]; this.pointList.pop(); } else { point = null; } } this.curIndex = -1; this.curPoint = null; this.update(); return point; } /** * 多边形顶点的移动位置 * * @param x 点位得 x 坐标 * @param y 点位得 y 坐标 * @param i 点位得 i 坐标 * @return 移动对应得点。如果索引无法找到移动顶点,则返回 null */ movePoint(x: number, y: number, i: number): SPoint | null { let point if (i >= this.pointList.length || i < 0) { return null; } if (this.pointList.length) { this.pointList[i].x = x; this.pointList[i].y = y; } point = this.pointList[i]; return point; } /** * 展示状态 -- 绘制多边形数组 * * @param painter 绘制类 * @param pointList 绘制多边形数组 */ protected drawShowPolygon(painter: SPainter, pointList: SPoint[]): void { painter.save(); const eachPx = painter.toPx(1) painter.pen.lineCapStyle = SLineCapStyle.Square; painter.pen.color = this.strokeColor; painter.brush.color = this.fillColor; painter.pen.lineWidth = eachPx * this.lineWidth; if (this.lineStyle == SLineStyle.Dashed) { painter.pen.lineDash = [3 * eachPx, 7 * eachPx]; } else if (this.lineStyle == SLineStyle.Dotted) { painter.pen.lineDash = [eachPx * this.lineWidth, eachPx * this.lineWidth]; } painter.drawPolygon([...pointList]); painter.restore(); } /** * 创建状态 -- 绘制多边形数组 * * @param painter 绘制类 * @param pointList 绘制多边形数组 */ protected drawCreatePolygon(painter: SPainter, pointList: SPoint[]): void { painter.pen.lineCapStyle = SLineCapStyle.Square; painter.pen.color = this.strokeColor; painter.pen.lineWidth = painter.toPx(this.lineWidth); if (this.lastPoint && pointList.length) { painter.drawLine( pointList[pointList.length - 1].x, pointList[pointList.length - 1].y, this.lastPoint.x, this.lastPoint.y ); } painter.drawPolyline(pointList); painter.pen.color = SColor.Transparent; painter.brush.color = new SColor(this.fillColor.value); painter.pen.lineWidth = painter.toPx(this.lineWidth); if (this.lastPoint) { painter.drawPolygon([...pointList, this.lastPoint]); // 绘制顶点块 painter.pen.color = SColor.Black; painter.brush.color = SColor.White; pointList.forEach(item => { painter.drawCircle(item.x, item.y, painter.toPx(this.len / 2)); }); // 如果最后一个点在第一个点的灵敏度范围内,第一个点填充变红 if (this.pointList.length) { if ( SMathUtil.pointDistance( this.lastPoint.x, this.lastPoint.y, this.pointList[0].x, this.pointList[0].y ) < this.scenceLen ) { // 绘制第一个点的顶点块 painter.pen.color = SColor.Black; painter.brush.color = SColor.Red; painter.drawCircle( this.pointList[0].x, this.pointList[0].y, painter.toPx(this.len / 2) ); } } } else { painter.drawPolygon(pointList); } } /** * * 编辑状态 -- 绘制多边形数组 * * @param painter 绘制类 * @param pointList 绘制多边形数组 */ protected drawEditPolygon(painter: SPainter, pointList: SPoint[]): void { // 展示多边形 painter.pen.lineCapStyle = SLineCapStyle.Square; painter.pen.color = this.strokeColor; painter.pen.lineWidth = painter.toPx(this.lineWidth); painter.brush.color = new SColor(this.fillColor.value); painter.drawPolygon([...pointList]); // 绘制顶点块 painter.pen.color = SColor.Black; painter.brush.color = SColor.White; pointList.forEach((item, index) => { painter.brush.color = SColor.White; if (index == this.curIndex) { painter.brush.color = new SColor("#2196f3"); } painter.drawCircle(item.x, item.y, painter.toPx(this.len / 2)); }); } /** * 编辑状态操作多边形数组 * * @param event 鼠标事件 */ protected editPolygonPoint(event: SMouseEvent): void { // 判断是否为删除状态 isShift = true为删除状态 if (this.isShift) { // 1 判断是否点击在多边形顶点 let lenIndex = -1; // 当前点击到的点位索引; let curenLen = this.scenceLen; // 当前的灵敏度 this.pointList.forEach((item, index) => { let dis = SMathUtil.pointDistance( event.x, event.y, item.x, item.y ); if (dis < curenLen) { curenLen = dis; lenIndex = index; } }); // 若点击到,对该索引对应的点做删除 if (lenIndex != -1) { if (this.pointList.length <= 3) { return; } const delePoint = new SPoint( this.pointList[lenIndex].x, this.pointList[lenIndex].y ); this.deletePoint(lenIndex); // 记录顶点操作记录压入堆栈 this.recordAction(SGraphPointListDelete, [ this.pointList, delePoint, lenIndex ]); } } else { // 1 判断是否点击在多边形顶点 this.curIndex = -1; this.curPoint = null; let lenIndex = -1; // 当前点击到的点位索引; let curenLen = this.scenceLen; // 当前的灵敏度 this.pointList.forEach((item, index) => { let dis = SMathUtil.pointDistance( event.x, event.y, item.x, item.y ); if (dis < curenLen) { curenLen = dis; lenIndex = index; } }); this.curIndex = lenIndex; // 2判断是否点击在多边形得边上 if (-1 == lenIndex) { let len = SMathUtil.pointToLine( new SPoint(event.x, event.y), new SLine(this.pointList[0], this.pointList[1]) ), index = 0; if (this.pointList.length > 2) { for (let i = 1; i < this.pointList.length; i++) { let dis = SMathUtil.pointToLine( new SPoint(event.x, event.y), new SLine(this.pointList[i], this.pointList[i + 1]) ); if (i + 1 == this.pointList.length) { dis = SMathUtil.pointToLine( new SPoint(event.x, event.y), new SLine(this.pointList[i], this.pointList[0]) ); } if (dis.MinDis < len.MinDis) { len = dis; index = i; } } } // 判断是否有点 if (len.Point) { // 点在了多边形的边上 if (len.MinDis <= this.scenceLen) { this.pointList.splice(index + 1, 0, len.Point); // 记录新增顶点操作记录压入堆栈 this.recordAction(SGraphPointListInsert, [ this.pointList, len.Point, index + 1 ]); } else { //没点在多边形边上也没点在多边形顶点上 super.onMouseDown(event); } } } else { // 当捕捉到顶点后 ,记录当前点的xy坐标,用于undo、redo操作 this.curPoint = new SPoint( this.pointList[this.curIndex].x, this.pointList[this.curIndex].y ); } // 刷新视图 this.update(); } } /** * 记录相关动作并推入栈中 * * @param SGraphCommand 相关命令类 * @param any 对应传入参数 */ protected recordAction(SGraphCommand: any, any: any[]): void { // 记录相关命令并推入堆栈中 const sgraphcommand = new SGraphCommand(this.scene, this, ...any); this.undoStack.push(sgraphcommand); } /** * 执行取消操作执行 */ undo(): void { if (this.status == SItemStatus.Normal) { return; } this.undoStack.undo(); } /** * 执行重做操作执行 */ redo(): void { if (this.status == SItemStatus.Normal) { return; } this.undoStack.redo(); } /** * 键盘事件 * * @param event 事件参数 * @return 是否处理该事件 */ onKeyUp(event: KeyboardEvent): boolean { if (this.status == SItemStatus.Normal) { return false; } else if (this.status == SItemStatus.Create) { if (event.code == "Enter") { // 当顶点大于二个时才又条件执行闭合操作并清空堆栈 if (this.pointList.length > 2) { this.status = SItemStatus.Normal; //3 传递完成事件状态 this.$emit("finishCreated"); //1 grabItem 置为null this.releaseItem(); } } } else if (this.status == SItemStatus.Edit) { if (event.keyCode == SKeyCode.Delete) { // 当多边形的顶点大于三个允许删除点 if (this.pointList.length > 3) { this.deletePoint(this.curIndex); } } } this.update(); return true; } /** * 鼠标按下事件 * * @param event 事件参数 * @return 是否处理该事件 */ onMouseDown(event: SMouseEvent): boolean { if (event.shiftKey) { event = this.compare(event); } // 如果状态为编辑状态则添加点 if (this.status == SItemStatus.Create) { // 新增顶点 let len = -1; if (this.pointList.length) { len = SMathUtil.pointDistance( event.x, event.y, this.pointList[0].x, this.pointList[0].y ); } if (this.pointList.length > 2 && len > 0 && len < this.scenceLen) { this.$emit("finishCreated"); this.status = SItemStatus.Normal; this.releaseItem(); } else { this.insertPoint(event.x, event.y); // 记录新增顶点操作记录压入堆栈 let pos = new SPoint(event.x, event.y); this.recordAction(SGraphPointListInsert, [this.pointList, pos]); } } else if (this.status == SItemStatus.Edit) { // 对多边形数组做编辑操作 this.editPolygonPoint(event); } else { super.onMouseDown(event); } return true; } /** * 鼠标移入事件 * * @param event 事件参数 * @return 是否处理该事件 */ onMouseEnter(event: SMouseEvent): boolean { return true; } /** * 鼠标移出事件 * * @param event 事件参数 * @return 是否处理该事件 */ onMouseLeave(event: SMouseEvent): boolean { return true; } /** * 鼠标移动事件 * * @param event 事件参数 * @return 是否处理该事件 */ onMouseMove(event: SMouseEvent): boolean { if (event.shiftKey) { event = this.compare(event); } if (this.status == SItemStatus.Create) { this.lastPoint = new SPoint(); this.lastPoint.x = event.x; this.lastPoint.y = event.y; this.update(); } else if (this.status == SItemStatus.Edit) { if (event.buttons == 1) { if (-1 != this.curIndex) { this.pointList[this.curIndex].x = event.x; this.pointList[this.curIndex].y = event.y; } } this.update(); } else { return super.onMouseMove(event); } return true; } /** * shift 垂直水平创建或编辑 * * @param event 事件 */ compare(event: SMouseEvent): SMouseEvent { if (this.pointList.length) { let last = new SPoint(event.x, event.y); if (this.status == SItemStatus.Create) { last = this.pointList[this.pointList.length - 1]; } else if (this.status == SItemStatus.Edit) { if (this.curIndex > 0) { last = this.pointList[this.curIndex - 1]; } } const dx = Math.abs(event.x - last.x); const dy = Math.abs(event.y - last.y); if (dy > dx) { event.x = last.x; } else { event.y = last.y; } } return event; } /** * 鼠标抬起事件 * * @param event 事件参数 * @return 是否处理该事件 */ onMouseUp(event: SMouseEvent): boolean { if (this.status == SItemStatus.Edit) { if (-1 != this.curIndex) { const pos = new SPoint( this.pointList[this.curIndex].x, this.pointList[this.curIndex].y ); this.recordAction(SGraphPointListUpdate, [ this.pointList, this.curPoint, pos, this.curIndex ]); } } else if (this.status == SItemStatus.Normal) { return super.onMouseUp(event); } else if (this.status == SItemStatus.Create) { } return true; } /** * 取消操作 */ cancelOperate(): void { // 当状态为展示状态 if (this.status == SItemStatus.Create) { // 闭合多边形 this.parent = null; } else if (this.status == SItemStatus.Edit) { // 编辑状态 this.status = SItemStatus.Normal; } this.update(); } /** * Item 对象边界区域 * * @return 边界区域 */ boundingRect(): SRect { if (this.pointList.length) { this.minX = this.pointList[0].x; this.maxX = this.pointList[0].x; this.minY = this.pointList[0].y; this.maxY = this.pointList[0].y; this.pointList.forEach(it => { let x = it.x, y = it.y; if (x < this.minX) { this.minX = x; } if (y < this.minY) { this.minY = y; } if (x > this.maxX) { this.maxX = x; } if (y > this.maxY) { this.maxY = y; } }); } return new SRect( this.minX, this.minY, this.maxX - this.minX, this.maxY - this.minY ); } /** * 判断点是否在区域内 * * @param x x 坐标 * @param y y 坐标 * @return 是否在该区域内 */ contains(x: number, y: number): boolean { let arr = this.pointList; if (arr.length < 3 || !SPolygonUtil.pointIn(x, y, arr)) { return false; } return true; } /** * 选择器放缩控制大小变化' * * @param old 旧的大小 * @param newS 新的大小 */ resize(old: SSize, newS: SSize): void { const xs = newS.width / old.width; const ys = newS.height / old.height; this.pointList = this.pointList.map(item => { item.x = item.x * xs; item.y = item.y * ys; return item }); } /** * Item 绘制操作 * * @param painter 绘制对象 */ onDraw(painter: SPainter): void { this.scenceLen = painter.toPx(this.len); // 当状态为展示状态 if (this.status == SItemStatus.Normal) { // 闭合多边形 this.drawShowPolygon(painter, this.pointList); } else if (this.status == SItemStatus.Create) { // 创建状态 this.drawCreatePolygon(painter, this.pointList); } else { // 编辑状态 this.drawEditPolygon(painter, this.pointList); } } }