vis.js is a dynamic, browser-based visualization library
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'use strict';
import CircleImageBase from '../util/CircleImageBase'
class Image extends CircleImageBase {
constructor (options, body, labelModule, imageObj) {
super(options, body, labelModule);
this.imageObj = imageObj;
}
resize() {
this._resizeImage();
}
draw(ctx, x, y, selected, hover) {
this.resize();
this.left = x - this.width / 2;
this.top = y - this.height / 2;
if (this.options.shapeProperties.useBorderWithImage === true) {
let borderWidth = this.options.borderWidth;
let selectionLineWidth = this.options.borderWidthSelected || 2 * this.options.borderWidth;
ctx.beginPath();
// setup the line properties.
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);
// set a fillstyle
ctx.fillStyle = selected ? this.options.color.highlight.background : hover ? this.options.color.hover.background : this.options.color.background;
// draw a rectangle to form the border around. This rectangle is filled so the opacity of a picture (in future vis releases?) can be used to tint the image
ctx.rect(this.left - 0.5 * ctx.lineWidth,
this.top - 0.5 * ctx.lineWidth,
this.width + ctx.lineWidth,
this.height + ctx.lineWidth);
ctx.fill();
//draw dashed border if enabled, save and restore is required for firefox not to crash on unix.
ctx.save();
this.enableBorderDashes(ctx);
//draw the border
ctx.stroke();
//disable dashed border for other elements
this.disableBorderDashes(ctx);
ctx.restore();
ctx.closePath();
}
this._drawImageAtPosition(ctx);
this._drawImageLabel(ctx, x, y, selected || hover);
this.updateBoundingBox(x,y);
}
updateBoundingBox(x,y) {
this.resize();
this.left = x - this.width / 2;
this.top = y - this.height / 2;
this.boundingBox.top = this.top;
this.boundingBox.left = this.left;
this.boundingBox.right = this.left + this.width;
this.boundingBox.bottom = this.top + this.height;
if (this.options.label !== undefined && this.labelModule.size.width > 0) {
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.labelOffset);
}
}
distanceToBorder(ctx, angle) {
this.resize(ctx);
var a = this.width / 2;
var b = this.height / 2;
var w = (Math.sin(angle) * a);
var h = (Math.cos(angle) * b);
return a * b / Math.sqrt(w * w + h * h);
}
}
export default Image;