vis.js is a dynamic, browser-based visualization library
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'use strict';
import CircleImageBase from '../util/CircleImageBase'
class CircularImage extends CircleImageBase {
constructor (options, body, labelModule, imageObj, imageObjAlt) {
super(options, body, labelModule);
this.setImages(imageObj, imageObjAlt);
this._swapToImageResizeWhenImageLoaded = true;
}
resize(ctx, selected = this.selected, hover = this.hover) {
if ((this.imageObj.src === undefined) ||
(this.imageObj.width === undefined) ||
(this.imageObj.height === undefined) ||
(this.labelModule.differentState(selected, hover))) {
var diameter = this.options.size * 2;
this.width = diameter;
this.height = diameter;
this._swapToImageResizeWhenImageLoaded = true;
this.radius = 0.5*this.width;
} else {
if (this._swapToImageResizeWhenImageLoaded) {
this.width = undefined;
this.height = undefined;
this._swapToImageResizeWhenImageLoaded = false;
}
this._resizeImage();
}
}
draw(ctx, x, y, selected, hover, values) {
// switch images depending on 'selected' if imageObjAlt exists
if (this.imageObjAlt) {
this.switchImages(selected);
}
this.resize();
this.left = x - this.width / 2;
this.top = y - this.height / 2;
let size = Math.min(0.5*this.height, 0.5*this.width);
// draw the background circle. IMPORTANT: the stroke in this method is used by the clip method below.
this._drawRawCircle(ctx, x, y, selected, hover, values);
// now we draw in the circle, we save so we can revert the clip operation after drawing.
ctx.save();
// clip is used to use the stroke in drawRawCircle as an area that we can draw in.
ctx.clip();
// draw the image
this._drawImageAtPosition(ctx, values);
// restore so we can again draw on the full canvas
ctx.restore();
this._drawImageLabel(ctx, x, y, selected, hover);
this.updateBoundingBox(x,y);
}
updateBoundingBox(x,y) {
this.boundingBox.top = y - this.options.size;
this.boundingBox.left = x - this.options.size;
this.boundingBox.right = x + this.options.size;
this.boundingBox.bottom = y + this.options.size;
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);
return this.width * 0.5;
}
}
export default CircularImage;