vis.js is a dynamic, browser-based visualization library
 
 
 

82 lines
2.5 KiB

'use strict';
import NodeBase from '../util/NodeBase'
class Icon extends NodeBase {
constructor(options, body, labelModule) {
super(options, body, labelModule);
}
resize(ctx) {
if (this.width === undefined) {
var margin = 5;
var iconSize = {
width: Number(this.options.icon.size),
height: Number(this.options.icon.size)
};
this.width = iconSize.width + 2 * margin;
this.height = iconSize.height + 2 * margin;
this.radius = 0.5*this.width;
}
}
draw(ctx, x, y, selected, hover) {
this.resize(ctx);
this.options.icon.size = this.options.icon.size || 50;
this.left = x - this.width * 0.5;
this.top = y - this.height * 0.5;
this._icon(ctx, x, y, selected);
if (this.options.label !== undefined) {
var iconTextSpacing = 5;
this.labelModule.draw(ctx, x, y + this.height * 0.5 + iconTextSpacing, selected);
}
this.updateBoundingBox(x,y)
}
updateBoundingBox(x,y) {
this.boundingBox.top = y - this.options.icon.size * 0.5;
this.boundingBox.left = x - this.options.icon.size * 0.5;
this.boundingBox.right = x + this.options.icon.size * 0.5;
this.boundingBox.bottom = y + this.options.icon.size * 0.5;
if (this.options.label !== undefined && this.labelModule.size.width > 0) {
var iconTextSpacing = 5;
this.boundingBox.left = Math.min(this.boundingBox.left, this.labelModule.size.left);
this.boundingBox.right = Math.max(this.boundingBox.right, this.labelModule.size.left + this.labelModule.size.width);
this.boundingBox.bottom = Math.max(this.boundingBox.bottom, this.boundingBox.bottom + this.labelModule.size.height + iconTextSpacing);
}
}
_icon(ctx, x, y, selected) {
let iconSize = Number(this.options.icon.size);
if (this.options.icon.code !== undefined) {
ctx.font = (selected ? "bold " : "") + iconSize + "px " + this.options.icon.face;
// draw icon
ctx.fillStyle = this.options.icon.color || "black";
ctx.textAlign = "center";
ctx.textBaseline = "middle";
// draw shadow if enabled
this.enableShadow(ctx);
ctx.fillText(this.options.icon.code, x, y);
// disable shadows for other elements.
this.disableShadow(ctx);
}
else {
console.error('When using the icon shape, you need to define the code in the icon options object. This can be done per node or globally.')
}
}
distanceToBorder(ctx, angle) {
return this._distanceToBorder(ctx,angle);
}
}
export default Icon;