vis.js is a dynamic, browser-based visualization library
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'use strict';
import NodeBase from '../util/NodeBase'
class Box extends NodeBase {
constructor (options, body, labelModule) {
super(options,body,labelModule);
}
resize(ctx, selected) {
if (this.width === undefined) {
let margin = 5;
let textSize = this.labelModule.getTextSize(ctx,selected);
this.width = textSize.width + 2 * margin;
this.height = textSize.height + 2 * margin;
this.radius = 0.5*this.width;
}
}
draw(ctx, x, y, selected, hover) {
this.resize(ctx, selected);
this.left = x - this.width / 2;
this.top = y - this.height / 2;
let borderWidth = this.options.borderWidth;
let 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;
let borderRadius = this.options.shapeProperties.borderRadius; // only effective for box
ctx.roundRect(this.left, this.top, this.width, this.height, borderRadius);
// 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);
this.left = x - this.width * 0.5;
this.top = y - this.height * 0.5;
let borderRadius = this.options.shapeProperties.borderRadius; // only effective for box
this.boundingBox.left = this.left - borderRadius;
this.boundingBox.top = this.top - borderRadius;
this.boundingBox.bottom = this.top + this.height + borderRadius;
this.boundingBox.right = this.left + this.width + borderRadius;
}
distanceToBorder(ctx, angle) {
this.resize(ctx);
let borderWidth = this.options.borderWidth;
return Math.min(
Math.abs((this.width) / 2 / Math.cos(angle)),
Math.abs((this.height) / 2 / Math.sin(angle))) + borderWidth;
}
}
export default Box;