@inweb/markup/src/markup/Konva/KonvaEllipse.ts

JavaScript 2D markups

import Konva from "konva";
import { IMarkupEllipse, IMarkupEllipseParams } from "../IMarkupEllipse";

export class KonvaEllipse implements IMarkupEllipse {
  private _ref: Konva.Ellipse;

  constructor(params: IMarkupEllipseParams, ref = null) {
    if (ref) {
      this._ref = ref;
      return;
    }

    if (!params) params = {};
    if (!params.position) params.position = { x: 0, y: 0 };
    if (!params.radius) params.radius = { x: 25, y: 25 };

    this._ref = new Konva.Ellipse({
      stroke: params.color ?? "#ff0000",
      strokeWidth: params.lineWidth ?? 4,
      globalCompositeOperation: "source-over",
      lineCap: "round",
      lineJoin: "round",
      x: params.position.x,
      y: params.position.y,
      radiusX: params.radius.x,
      radiusY: params.radius.y,
      draggable: true,
      strokeScaleEnabled: false,
    });

    this._ref.on("transform", (e) => {
      const attrs = e.target.attrs;

      if (attrs.rotation !== this._ref.rotation()) this._ref.rotation(attrs.rotation);

      const scaleByX = Math.abs(attrs.scaleX - 1) > 10e-6;
      const scaleByY = Math.abs(attrs.scaleY - 1) > 10e-6;

      let newRadiusX = this._ref.radiusX();
      if (scaleByX) newRadiusX *= attrs.scaleX;
      let newRadiusY = this._ref.radiusY();
      if (scaleByY) newRadiusY *= attrs.scaleY;

      const minRadiusX = 25;
      const minRadiusY = 25;

      if (newRadiusX < minRadiusX) newRadiusX = minRadiusX;
      if (newRadiusY < minRadiusY) newRadiusY = minRadiusY;

      if (e.evt.ctrlKey || e.evt.shiftKey) {
        if (scaleByX) {
          this._ref.radius({ x: newRadiusX, y: newRadiusX });
        } else {
          this._ref.radius({ x: newRadiusY, y: newRadiusY });
        }
      } else {
        this._ref.radius({ x: newRadiusX, y: newRadiusY });
      }

      this._ref.scale({ x: 1, y: 1 });
    });

    this._ref.id(this._ref._id.toString());
  }

  getPosition(): { x: number; y: number } {
    return this._ref.position();
  }

  setPosition(x: number, y: number): void {
    this._ref.setPosition({ x, y });
  }

  getRadiusX(): number {
    return this._ref.radiusX();
  }

  setRadiusX(r: number): void {
    this._ref.radiusX(r);
  }

  getRadiusY(): number {
    return this._ref.radiusY();
  }

  setRadiusY(r: number): void {
    this._ref.radiusY(r);
  }

  getLineWidth(): number {
    return this._ref.strokeWidth();
  }

  setLineWidth(size: number): void {
    this._ref.strokeWidth(size);
  }

  ref() {
    return this._ref;
  }

  id(): string {
    return this._ref.id();
  }

  enableMouseEditing(value: boolean): void {
    this._ref.draggable(value);
  }

  type(): string {
    return "Ellipse";
  }

  getColor(): string {
    return this._ref.stroke() as string;
  }

  setColor(hex: string): void {
    this._ref.stroke(hex);
  }

  getRotation(): number {
    return this._ref.rotation();
  }

  setRotation(degrees: number): void {
    this._ref.rotation(degrees);
  }

  getZIndex(): number {
    return this._ref.zIndex();
  }

  setZIndex(zIndex: number): void {
    this._ref.zIndex(zIndex);
  }

  delete() {
    this._ref.destroy();
    this._ref = null;
  }
}