jrtechs-vis/lib/network/modules/components/nodes/shapes/Circle.js

'use strict';

import CircleImageBase from '../util/CircleImageBase'

/**
 * A Circle Node/Cluster shape.
 *
 * @extends CircleImageBase
 */
class Circle extends CircleImageBase {
  /**
   * @param {Object} options
   * @param {Object} body
   * @param {Label} labelModule
   */
  constructor(options, body, labelModule) {
    super(options, body, labelModule);
    this._setMargins(labelModule);
  }

  /**
   *
   * @param {CanvasRenderingContext2D} ctx
   * @param {boolean} [selected]
   * @param {boolean} [hover]
   */
  resize(ctx, selected = this.selected, hover = this.hover) {
    if (this.needsRefresh(selected, hover)) {
      var dimensions = this.getDimensionsFromLabel(ctx, selected, hover);

      var diameter = Math.max(dimensions.width  + this.margin.right + this.margin.left,
                              dimensions.height + this.margin.top   + this.margin.bottom);

      this.options.size = diameter / 2; // NOTE: this size field only set here, not in Ellipse, Database, Box
      this.width = diameter;
      this.height = diameter;
      this.radius = this.width / 2;
    }
  }

  /**
   *
   * @param {CanvasRenderingContext2D} ctx
   * @param {number} x width
   * @param {number} y height
   * @param {boolean} selected
   * @param {boolean} hover
   * @param {{toArrow: boolean, toArrowScale: (allOptions.edges.arrows.to.scaleFactor|{number}|allOptions.edges.arrows.middle.scaleFactor|allOptions.edges.arrows.from.scaleFactor|Array|number), toArrowType: *, middleArrow: boolean, middleArrowScale: (number|allOptions.edges.arrows.middle.scaleFactor|{number}|Array), middleArrowType: (allOptions.edges.arrows.middle.type|{string}|string|*), fromArrow: boolean, fromArrowScale: (allOptions.edges.arrows.to.scaleFactor|{number}|allOptions.edges.arrows.middle.scaleFactor|allOptions.edges.arrows.from.scaleFactor|Array|number), fromArrowType: *, arrowStrikethrough: (*|boolean|allOptions.edges.arrowStrikethrough|{boolean}), color: undefined, inheritsColor: (string|string|string|allOptions.edges.color.inherit|{string, boolean}|Array|*), opacity: *, hidden: *, length: *, shadow: *, shadowColor: *, shadowSize: *, shadowX: *, shadowY: *, dashes: (*|boolean|Array|allOptions.edges.dashes|{boolean, array}), width: *}} values
   */
  draw(ctx, x, y, selected, hover, values) {
    this.resize(ctx, selected, hover);
    this.left = x - this.width / 2;
    this.top = y - this.height / 2;

    this._drawRawCircle(ctx, x, y, values);

    this.updateBoundingBox(x,y);
    this.labelModule.draw(ctx, this.left + this.textSize.width / 2 + this.margin.left,
                               y, selected, hover);
  }

  /**
   *
   * @param {number} x width
   * @param {number} y height
   */
  updateBoundingBox(x, y) {
    this.boundingBox.top = y - this.options.size;
    this.boundingBox.left = x - this.options.size;
    this.boundingBox.right = x + this.options.size;
    this.boundingBox.bottom = y + this.options.size;
  }

  /**
   *
   * @param {CanvasRenderingContext2D} ctx
   * @param {number} angle - Unused
   * @returns {number}
   */
  distanceToBorder(ctx, angle) {  // eslint-disable-line no-unused-vars
    this.resize(ctx);
    return this.width * 0.5;
  }
}

export default Circle;