visjs-network
Version:
A dynamic, browser-based network visualization library.
78 lines (68 loc) • 1.85 kB
JavaScript
'use strict'
import NodeBase from '../util/NodeBase'
/**
* A text-based replacement for the default Node shape.
*
* @extends NodeBase
*/
class Text extends NodeBase {
/**
* @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, hover) {
if (this.needsRefresh(selected, hover)) {
this.textSize = this.labelModule.getTextSize(ctx, selected, hover)
this.width = this.textSize.width + this.margin.right + this.margin.left
this.height = this.textSize.height + this.margin.top + this.margin.bottom
this.radius = 0.5 * this.width
}
}
/**
*
* @param {CanvasRenderingContext2D} ctx
* @param {number} x width
* @param {number} y height
* @param {boolean} selected
* @param {boolean} hover
* @param {ArrowOptions} 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
// draw shadow if enabled
this.enableShadow(ctx, values)
this.labelModule.draw(
ctx,
this.left + this.textSize.width / 2 + this.margin.left,
this.top + this.textSize.height / 2 + this.margin.top,
selected,
hover
)
// disable shadows for other elements.
this.disableShadow(ctx, values)
this.updateBoundingBox(x, y, ctx, selected, hover)
}
/**
*
* @param {CanvasRenderingContext2D} ctx
* @param {number} angle
* @returns {number}
*/
distanceToBorder(ctx, angle) {
return this._distanceToBorder(ctx, angle)
}
}
export default Text