jrtechs-vis/lib/network/modules/components/nodes/ellipse.js

/**
 * Created by Alex on 3/18/2015.
 */
'use strict';

class Ellipse {
  constructor(options, body, labelModule) {
    this.body = body;
    this.labelModule = labelModule;
    this.setOptions(options);
    this.top = undefined;
    this.left = undefined;
    this.height = undefined;
    this.height = undefined;
    this.boundingBox = {top: 0, left: 0, right: 0, bottom: 0};
  }

  setOptions(options) {
    this.options = options;
  }

  resize(ctx, selected) {
    if (this.width === undefined) {
      var textSize = this.labelModule.getTextSize(ctx, selected);

      this.width = textSize.width * 1.5;
      this.height = textSize.height * 2;
      if (this.width < this.height) {
        this.width = this.height;
      }
    }
  }

  draw(ctx, x, y, selected, hover) {
    this.resize(ctx, selected);
    this.left = x - this.width / 2;
    this.top = y - this.height / 2;

    var borderWidth = this.options.borderWidth;
    var selectionLineWidth = this.options.borderWidthSelected || 2 * this.options.borderWidth;

    ctx.strokeStyle = selected ? this.options.color.highlight.border : hover ? this.options.color.hover.border : this.options.color.border;

    ctx.lineWidth = (selected ? selectionLineWidth : borderWidth);
    ctx.lineWidth /= this.body.view.scale;
    ctx.lineWidth = Math.min(this.width, ctx.lineWidth);

    ctx.fillStyle = selected ? this.options.color.highlight.background : hover ? this.options.color.hover.background : this.options.color.background;
    ctx.ellipse(this.left, this.top, this.width, this.height);
    ctx.fill();
    ctx.stroke();

    this.boundingBox.left = this.left;
    this.boundingBox.top = this.top;
    this.boundingBox.bottom = this.top + this.height;
    this.boundingBox.right = this.left + this.width;


    this.labelModule.draw(ctx, x, y, selected);
  }

  distanceToBorder(ctx, angle) {
    this.resize(ctx);
    var a = this.width / 2;
    var b = this.height / 2;
    var w = (Math.sin(angle) * a);
    var h = (Math.cos(angle) * b);
    return a * b / Math.sqrt(w * w + h * h);
  }
}

export default Ellipse;