persagy_topo_editer/src/components/editClass/edit/items/SBaseLineEdit.ts

/*
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 *      .&888888I                                          Copyright (c) 2016-2020.  博锐尚格科技股份有限公司
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 *
 * *********************************************************************************************************************
 */

import { SColor, SLine, SPainter, SPoint, SRect } from "@persagy-web/draw/";
import { SMouseButton, SMouseEvent, SUndoStack } from "@persagy-web/base";
import { SMathUtil } from "@persagy-web/big/lib/utils/SMathUtil";
import { SItemStatus } from "@persagy-web/big";
import {
    SGraphPointListInsert,
    SGraphPointListUpdate,
    SLineStyle,
    SGraphItem
} from "@persagy-web/graph/";
import { SGraphEdit } from ".."
import { Marker } from "../type/Marker";

/**
 * 直线编辑类
 *
 * @author  韩耀龙 <han_yao_long@163.com>
 */
export class SBaseLineEdit extends SGraphEdit {
    ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    //属性

    /** 编辑相关操作的数据 */
    data: Marker
    /** 起始锚点 */
    startItem: SGraphItem | null = null;
    /** 结束锚点 */
    endItem: SGraphItem | null = null;
    /** 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;
    /** 线段 */
    private _line: SPoint[] = [];
    get line(): SPoint[] {
        return this._line;
    } // Get line
    set line(arr: SPoint[]) {
        this._line = arr;
        this.update();
    } // Set line
    
    /** 是否垂直水平绘制 */
    private _verAndLeve: Boolean = false;
    get verAndLeve(): Boolean {
        return this._verAndLeve;
    } // Get verAndLeve
    set verAndLeve(bool: Boolean) {
        this._verAndLeve = bool;
        this.update();
    } // Set verAndLeve

    /** 是否完成绘制 */
    protected _status: SItemStatus = SItemStatus.Normal;
    get status(): SItemStatus {
        return this._status;
    } // Get status
    set status(v: SItemStatus) {
        this._status = v;
        this.undoStack.clear();
        this.update();
    } // Set status

    /** 线条颜色 */
    private _strokeColor: SColor = SColor.Black;
    get strokeColor(): SColor {
        return this._strokeColor;
    } // Get strokeColor
    set strokeColor(v: SColor) {
        this._strokeColor = v;
        this.update();
    }// Get strokeColor

    /** 线条样式 */
    private _lineStyle: SLineStyle = SLineStyle.Solid;
    get lineStyle(): SLineStyle {
        return this._lineStyle;
    } // Get lineStyle
    set lineStyle(v: SLineStyle) {
        this._lineStyle = v;
        this.update();
    } // Set lineStyle

    /** 端点填充色 */
    private _fillColor: SColor = SColor.White;
    get fillColor(): SColor {
        return this._fillColor;
    } // Get fillColor
    set fillColor(v: SColor) {
        this._fillColor = v;
        this.update();
    } //Set fillColor

    /** 选中端点填充色 */
    private _activeFillColor: SColor = new SColor("#2196f3");
    get activeFillColor(): SColor {
        return this._activeFillColor;
    } //Get activeFillColor
    set activeFillColor(v: SColor) {
        this._activeFillColor = v;
        this.update();
    } //Set activeFillColor

    /** 线条宽度 */
    private _lineWidth: number = 1;
    get lineWidth(): number {
        return this._lineWidth;
    } //Get lineWidth
    set lineWidth(v: number) {
        this._lineWidth = v;
        this.update();
    } //Set lineWidth

    /** 拖动灵敏度 */
    dis: number = 5;
    /** 拖动灵敏度 */
    protected sceneDis: number = 5;
    /** 当前点索引 */
    curIndex: number = -1;
    /** 当前点坐标 */
    private curPoint: SPoint | null = null;
    /** undo/redo 堆栈 */
    private undoStack: SUndoStack = new SUndoStack();

    /**
     * 构造函数
     *
     * @param parent    父级
     * @param data      坐标集合|第一个点坐标
     */
    constructor(parent: SGraphItem | null, data: Marker) {
        super(parent);
        this.showSelect = false;
        this.data = data;
        if (data.style && data.style.default) {
            // 关于顶点
            if (data.style.default.line) {
                let setPointList: SPoint[];
                setPointList = data.style.default.line.map((i: { x: number; y: number; }) => {
                    return new SPoint(i.x, i.y)
                });
                this.line = setPointList;
            }
            // 颜色
            if (data.style.default.strokeColor) {
                this.strokeColor = new SColor(data.style.default.strokeColor)
            }
            // 颜色
            if (data.style.default.fillColor) {
                this.fillColor = new SColor(data.style.default.fillColor)
            }
            // 线宽
            if (data.style.default.lineWidth) {
                this.lineWidth = data.style.default.lineWidth
            }

            // 线样式
            if (data.style.default.lineStyle) {
                this.lineStyle = data.style.default.lineStyle
            }
        }
    }

    /**
     * 添加点至数组中
     *
     * @param p       添加的点
     */
    private addPoint(p: SPoint): void {
        if (this.line.length < 2) {
            this.line.push(p);
            this.recordAction(SGraphPointListInsert, [this.line, p]);
        } else {
            this.line[1] = p;
            this.recordAction(SGraphPointListInsert, [this.line, p, 1]);
            this.status = SItemStatus.Normal;
            this.releaseItem();
            this.$emit("finishCreated");
            this.pointChange();
        }

        this.update();
    } // Function addPoint()

    /**
     * 鼠标双击事件
     *
     * @param	event       事件参数
     * @return	该事件是否被处理
     */
    onDoubleClick(event: SMouseEvent): boolean {
        if (this.status == SItemStatus.Normal) {
            this.status = SItemStatus.Edit;
            this.grabItem(this);
        } else if (this.status == SItemStatus.Edit) {
            this.status = SItemStatus.Normal;
            this.releaseItem();
        }

        this.update();
        return true;
    } // Function onDoubleClick()

    /**
     * 鼠标按下事件
     *
     * @param event   鼠标事件
     * @return  是否处理事件
     */
    onMouseDown(event: SMouseEvent): boolean {
        this.curIndex = -1;
        this.curPoint = null;
        if (event.shiftKey || this._verAndLeve) {
            event = this.compare(event);
        }

        if (event.buttons == SMouseButton.LeftButton) {
            if (this.status == SItemStatus.Normal) {
                // return super.onMouseDown(event);
                super.onMouseDown(event);
                return true;
            } else if (this.status == SItemStatus.Edit) {
                // 判断是否点击到端点上(获取端点索引值)
                this.findNearestPoint(new SPoint(event.x, event.y));
            } else if (this.status == SItemStatus.Create) {
                this.addPoint(new SPoint(event.x, event.y));
                return true;
            }
        }

        return true;
    } // Function onMouseDown()

    /**
     * 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 (this.curIndex > -1) {
                const p = new SPoint(
                    this.line[this.curIndex].x,
                    this.line[this.curIndex].y
                );
                this.recordAction(SGraphPointListUpdate, [
                    this.line,
                    this.curPoint,
                    p,
                    this.curIndex
                ]);
            }
        } else if (this.status == SItemStatus.Normal) {
            super.onMouseUp(event);
            return true
        }

        this.curIndex = -1;
        this.curPoint = null;
        return true;
    } // Function onMouseUp()

    /**
      * 鼠标抬起事件
      *
      * @param event     事件参数
      * @return	 是否处理该事件
      */
    onKeyUp(event: KeyboardEvent): void {
        // 当 ESC 时
        if (27 == event.keyCode) {
            if (this.status == SItemStatus.Edit) {
                this.status = SItemStatus.Normal;
                this.releaseItem();
            } else if (this.status == SItemStatus.Create) {
                this.update()
                this.releaseItem();
                this.parent = null;
            }
        }
    } // Function onKeyUp()

    /**
     * 鼠标移动事件
     *
     * @param event   鼠标事件
     * @return 是否处理事件
     */
    onMouseMove(event: SMouseEvent): boolean {
        if (event.shiftKey || this._verAndLeve) {
            event = this.compare(event);
        }

        if (this.status == SItemStatus.Create) {
            if (this.line[0] instanceof SPoint) {
                this.line[1] = new SPoint(event.x, event.y);
                this.pointChange();
            }
        } else if (this.status == SItemStatus.Edit) {
            if (-1 != this.curIndex) {
                this.line[this.curIndex].x = event.x;
                this.line[this.curIndex].y = event.y;
                this.pointChange();
            }
        } else {
            return super.onMouseMove(event);
        }

        this.update();
        return true;
    } // Function onMouseMove()

     /**
     * 点发生变化
     */
    protected pointChange(): void {
        // do nothing
    } // Function pointChange()

    /**
     * 获取点击点与 Point[] 中的点距离最近点
     *
     * @param p   鼠标点击点
     */
    findNearestPoint(p: SPoint): void {
        let len = this.sceneDis;
        for (let i = 0; i < this.line.length; i++) {
            let dis = SMathUtil.pointDistance(
                p.x,
                p.y,
                this.line[i].x,
                this.line[i].y
            );
            if (dis < len) {
                len = dis;
                this.curIndex = i;
                this.curPoint = new SPoint(this.line[this.curIndex]);
            }
        }
    } // Function findNearestPoint()

    /**
     * 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 command = new SGraphCommand(this.scene, this, ...any);
        this.undoStack.push(command);
    } // Function recordAction()

    /**
     * 移动后处理所有坐标,并肩原点置为场景原点
     *
     * @param x   x 坐标
     * @param y   y 坐标
     */
    moveToOrigin(): void {
        this.line = this.line.map(t => {
            t.x = t.x + this.x;
            t.y = t.y + this.y;
            return t;
        });

        this.x = 0;
        this.y = 0;
    } // Function moveToOrigin()

    /**
     * shift 垂直水平创建或编辑
     *
     * @param event   事件
     * @return 鼠标事件
     */
    compare(event: SMouseEvent): SMouseEvent {
        if (this.line.length) {
            let last = new SPoint(event.x, event.y);
            if (this.status == SItemStatus.Create) {
                last = this.line[0];
            } else if (this.status == SItemStatus.Edit) {
                if (this.curIndex == 1) {
                    last = this.line[0];
                } else if (this.curIndex == 0) {
                    last = this.line[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;
    } // Function compare()

    /**
     * 判断点是否在区域内
     *
     * @param x     x 坐标
     * @param y     y 坐标
     * @return 是否在区域内
     */
    contains(x: number, y: number): boolean {
        if (this.line.length == 2) {
            let p = new SPoint(x, y);            
            if (
                SMathUtil.pointToLine(p, new SLine(this.line[0], this.line[1]))
                    .MinDis < this.sceneDis
            ) {
                return true;
            }
        }

        return false;
    } // Function contains()

    /**
     * 撤销操作
     */
    undo(): void {
        if (this.status != SItemStatus.Normal) {
            this.undoStack.undo();
        }
    } // Function undo()

    /**
     * 重做操作
     */
    redo(): void {
        if (this.status != SItemStatus.Normal) {
            this.undoStack.redo();
        }
    } // Function redo()

    /**
     * 取消操作 item 事件
     */
    cancelOperate(): void {
        if (this.status == SItemStatus.Create) {
            this.parent = null;
            this.releaseItem();
        } else if (this.status == SItemStatus.Edit) {
            this.status = SItemStatus.Normal;
            this.releaseItem();
        }
    } // Function cancelOperate()

    /**
     * Item 对象边界区域
     *
     * @return	边界区域
     */
    boundingRect(): SRect {
        if (this.line.length) {
            this.minX = this.line[0].x;
            this.maxX = this.line[0].x;
            this.minY = this.line[0].y;
            this.maxY = this.line[0].y;
            this.line.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
        );
    } // Function boundingRect()

    /**
     * 返回对象储存的相关数据
     *
     * @return	对象数据
     */
    toData(): any {
        this.moveToOrigin()
        const Line = [{ x: this.line[0].x, y: this.line[0].y }, { x: this.line[1].x, y: this.line[1].y }];
        this.data.style.default.line = Line;
        this.data.style.default.lineWidth = this.lineWidth;
        this.data.style.default.lineStyle = this.lineStyle;
        this.data.style.default.strokeColor = this.strokeColor.value;
        this.data.style.default.fillColor = this.fillColor.value;
        return this.data
    } // Function toData()

    /**
     * Item 绘制操作
     *
     * @param painter    绘制对象
     */
    onDraw(painter: SPainter): void {
        this.sceneDis = painter.toPx(this.dis);
        painter.pen.lineWidth = painter.toPx(this.lineWidth);
        painter.pen.color = this.strokeColor;
        if (this.line.length == 2) {
            // 绘制直线
            painter.pen.color = this.strokeColor;
            if (this.lineStyle == SLineStyle.Dashed) {
                painter.pen.lineDash = [
                    painter.toPx(this.lineWidth * 3),
                    painter.toPx(this.lineWidth * 7)
                ];
            } else if (this.lineStyle == SLineStyle.Dotted) {
                painter.pen.lineDash = [
                    painter.toPx(2 * this.lineWidth),
                    painter.toPx(2 * this.lineWidth)
                ];
            }

            if (this.selected && this.status == SItemStatus.Normal) {
                painter.pen.lineWidth = painter.toPx(this.lineWidth * 2);
                painter.shadow.shadowBlur = 10;
                painter.shadow.shadowColor = new SColor(`#00000033`);
                painter.shadow.shadowOffsetX = 5;
                painter.shadow.shadowOffsetY = 5;
            }

            painter.drawLine(this.line[0], this.line[1]);
            if (
                this.status == SItemStatus.Edit ||
                this.status == SItemStatus.Create
            ) {
                // 绘制端点
                this.line.forEach((p, i): void => {
                    painter.brush.color = this.fillColor;
                    if (i == this.curIndex) {
                        painter.brush.color = this.activeFillColor;
                    }
                    painter.drawCircle(p.x, p.y, painter.toPx(5));
                });
            }
        } else if (this.line.length == 1) {
            if (
                this.status == SItemStatus.Edit ||
                this.status == SItemStatus.Create
            ) {
                // 绘制端点
                painter.brush.color = this.fillColor;
                painter.drawCircle(
                    this.line[0].x,
                    this.line[0].y,
                    painter.toPx(5)
                );
            }
        }
    } // Function onDraw()
} // Class SBaseLineEdit