igeom/src/app/components/line-segment-component/drawers/line-segment-drawer.js

import { Drawer } from "../../../core/drawers/drawer";
import { ELEMENTS_CLASS } from "../../../core/enums/elements-class-enum";
import { label as Label } from "../../../component-registry/label";
import { DrawerAggregator } from "../../../core/drawers/drawer-aggregator";
import { selector as Selector } from "../../../core/application/selector";
import { LineSegmentModel } from "../models/line-segment-model";
import { PointDrawer } from "../../point-component/drawers/point-drawer";
import { objects as Objects } from "../../../core/application/objects";
import { app as App } from "../../../app";
import { stageManager as StageManager } from "../../../core/application/stage-manager";
const HOVER_STYLE = {
  fill: "#33BCFF",
  strokeWidth: 4,
  stroke: "#33BCFF"
};
const STYLE = {
  fill: "grey",
  strokeWidth: 2,
  stroke: "grey"
};
export class LineSegmentDrawer extends Drawer {
  static FIRST_POINT_STATE() {
    return "FIRST_POINT";
  }
  static SECOND_POINT_STATE() {
    return "SECOND_POINT";
  }
  constructor() {
    super();
    this.pointA;
    this.pointB;
    this.aggregatorA;
    this.aggregatorB;
    this.label;
    this.states = [
      LineSegmentDrawer.FIRST_POINT_STATE,
      LineSegmentDrawer.SECOND_POINT_STATE
    ];
    this.lineSegment;
    this.pointDrawer = new PointDrawer();
    super.setElementClass(ELEMENTS_CLASS.LINE_SEGMENT);
  }
  setPointA(point) {
    this.pointA = point;
  }
  setPointB(point) {
    this.pointB = point;
  }
  setAggregatorA(aggregator) {
    this.aggregatorA = aggregator;
    this.setPointA(aggregator.genericObject);
  }
  setAggregatorB(aggregator) {
    this.aggregatorB = aggregator;
    this.setPointB(aggregator.genericObject);
  }

  draw() {
    const points = Selector.getSelectedPoints();
    if (points == undefined || points.length == 0) {
      this.drawByState();
    }
    this.drawByPoints(points);
  }
  drawByState() {
    if (this.state == undefined) {
      super.setState(LineSegmentDrawer.FIRST_POINT_STATE);
    } else if (this.state == LineSegmentDrawer.FIRST_POINT_STATE) {
      const aggregator = this.pointDrawer.drawPoint();
      this.setAggregatorA(aggregator);
      super.setState(LineSegmentDrawer.SECOND_POINT_STATE);
    } else if (this.state == LineSegmentDrawer.SECOND_POINT_STATE) {
      const aggregator = this.pointDrawer.drawPoint();
      this.setAggregatorB(aggregator);
      this.drawByPoints(
        [this.pointA, this.pointB],
        [this.aggregatorA, this.aggregatorB]
      );
      super.setState(undefined);
    }
  }

  drawByPoints(points, aggregators) {
    if (points == undefined || points.length < 1) return;
    this.setPointA(points[0]);
    this.setPointB(points[1]);
    if (aggregators == undefined)
      aggregators = Selector.getSelectedPointsAggregators();
    else {
      aggregators = [
        Objects.getByGenericObject(this.pointA)[0],
        Objects.getByGenericObject(this.pointB)[0]
      ];
    }

    this.label = Label.draw();
    this.lineSegment = new LineSegmentModel(
      this.pointA,
      this.pointB,
      this.label
    );
    const konvaObject = LineSegmentDrawer.getKonvaLine(
      this.pointA,
      this.pointB
    );
    super.setKonvaObject(konvaObject);
    const aggregator = new DrawerAggregator(
      this,
      this.lineSegment,
      this.konvaObject,
      ELEMENTS_CLASS.LINE_SEGMENT
    );
    super.addAggregator(aggregator);
    aggregators[1].addAggregator(aggregator);
    aggregators[0].addAggregator(aggregator);
    Drawer.drawObject(this.konvaObject);
    this.konvaObject.zIndex(0);
    super.batchDraw();
  }

  update(aggregator) {
    const pointA = aggregator.genericObject.pointA;
    const pointB = aggregator.genericObject.pointB;
    aggregator.konvaObject.points([
      pointA.posX,
      pointA.posY,
      pointB.posX,
      pointB.posY
    ]);
    super.batchDraw();
  }

  insertPoint(aggregator) {
    const pointA = aggregator.genericObject.pointA;
    const pointB = aggregator.genericObject.pointB;
    const pointCAggregator = this.pointDrawer.drawPoint();
    const pointC = pointCAggregator.genericObject;
    aggregator.konvaObject.points([
      pointA.posX,
      pointA.posY,
      pointB.posX,
      pointB.posY,
      pointC.posX,
      pointC.posY
    ]);
    super.batchDraw();
  }

  static getKonvaLine(pointA, pointB, useLabel) {
    const points = [pointA.posX, pointA.posY, pointB.posX, pointB.posY];
    const line = new Konva.Line({
      points: points,
      stroke: "grey",
      strokeWidth: 2,
      lineJoin: "round",
      draggable: false,
      strokeScaleEnabled: false,
      class: ELEMENTS_CLASS.LINE_SEGMENT,
      connections: [],
      index: 0,
      selectable: false,
      draggable: false
    });
    LineSegmentDrawer.configureLineEvents(line);
    return line;
  }
  static configureLineEvents(line) {
    line.on("mouseover", function() {
      const selectedTool = App.getSelectedTool();
      if (
        selectedTool != undefined &&
        selectedTool.drawer != undefined &&
        selectedTool.drawer.elementClass == ELEMENTS_CLASS.INTERSECTION_POINT
      ) {
        this.strokeWidth(HOVER_STYLE.strokeWidth);
        this.stroke(HOVER_STYLE.stroke);
        StageManager.getCurrentKonvaStage().draw();
      }
    });
    line.on("mouseout", function() {
      this.strokeWidth(STYLE.strokeWidth);
      this.stroke(STYLE.stroke);
      StageManager.getCurrentKonvaStage().draw();
    });

    return line;
  }

  static drawKonvaLine(pointA, pointB) {
    const line = LineSegmentDrawer.getKonvaLine(pointA, pointB);
    return line;
  }
}