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