vis.js is a dynamic, browser-based visualization library
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'use strict';
import NodeBase from '../util/NodeBase'
class Ellipse extends NodeBase {
constructor(options, body, labelModule) {
super(options, body, labelModule);
}
resize(ctx, selected) {
if (this.width === undefined) {
var textSize = this.labelModule.getTextSize(ctx, selected);
this.height = textSize.height * 2;
this.width = textSize.width + this.height;
this.radius = 0.5*this.width;
}
}
draw(ctx, x, y, selected, hover) {
this.resize(ctx, selected);
this.left = x - this.width * 0.5;
this.top = y - this.height * 0.5;
var neutralborderWidth = this.options.borderWidth;
var selectionLineWidth = this.options.borderWidthSelected || 2 * this.options.borderWidth;
var borderWidth = (selected ? selectionLineWidth : neutralborderWidth) / this.body.view.scale;
ctx.lineWidth = Math.min(this.width, borderWidth);
ctx.strokeStyle = selected ? this.options.color.highlight.border : hover ? this.options.color.hover.border : this.options.color.border;
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);
// draw shadow if enabled
this.enableShadow(ctx);
// draw the background
ctx.fill();
// disable shadows for other elements.
this.disableShadow(ctx);
//draw dashed border if enabled, save and restore is required for firefox not to crash on unix.
ctx.save();
// if borders are zero width, they will be drawn with width 1 by default. This prevents that
if (borderWidth > 0) {
this.enableBorderDashes(ctx);
//draw the border
ctx.stroke();
//disable dashed border for other elements
this.disableBorderDashes(ctx);
}
ctx.restore();
this.updateBoundingBox(x, y, ctx, selected);
this.labelModule.draw(ctx, x, y, selected);
}
updateBoundingBox(x, y, ctx, selected) {
this.resize(ctx, selected); // just in case
this.left = x - this.width * 0.5;
this.top = y - this.height * 0.5;
this.boundingBox.left = this.left;
this.boundingBox.top = this.top;
this.boundingBox.bottom = this.top + this.height;
this.boundingBox.right = this.left + this.width;
}
distanceToBorder(ctx, angle) {
this.resize(ctx);
var a = this.width * 0.5;
var b = this.height * 0.5;
var w = (Math.sin(angle) * a);
var h = (Math.cos(angle) * b);
return a * b / Math.sqrt(w * w + h * h);
}
}
export default Ellipse;