import {Circle} from '../math/circle';
import {Point2D} from '../math/point';
import {logger} from '../utils/logger';
import {defaults} from '../app/defaults';
import {
isNodeNameShape,
DRAW_DEBUG,
getDefaultAnchor,
getAnchorShape
} from './drawBounds';
import {LabelFactory} from './labelFactory';
// external
import Konva from 'konva';
// doc imports
/* eslint-disable no-unused-vars */
import {Style} from '../gui/style';
import {Annotation} from '../image/annotation';
/* eslint-enable no-unused-vars */
/**
* Circle factory.
*/
export class CircleFactory {
/**
* The name of the factory.
*
* @type {string}
*/
#name = 'circle';
/**
* The associated label factory.
*
* @type {LabelFactory}
*/
#labelFactory = new LabelFactory(this.#getDefaultLabelPosition);
/**
* Does this factory support the input math shape.
*
* @param {object} mathShape The mathematical shape.
* @returns {boolean} True if supported.
*/
static supports(mathShape) {
return mathShape instanceof Circle;
}
/**
* Get the name of the factory.
*
* @returns {string} The name.
*/
getName() {
return this.#name;
}
/**
* Get the name of the shape group.
*
* @returns {string} The name.
*/
getGroupName() {
return this.#name + '-group';
}
/**
* Get the number of points needed to build the shape.
*
* @returns {number} The number of points.
*/
getNPoints() {
return 2;
}
/**
* Get the timeout between point storage.
*
* @returns {number} The timeout in milliseconds.
*/
getTimeout() {
return 0;
}
/**
* Set an annotation math shape from input points.
*
* @param {Annotation} annotation The annotation.
* @param {Point2D[]} points The points.
*/
setAnnotationMathShape(annotation, points) {
annotation.mathShape = this.#calculateMathShape(points);
annotation.setTextExpr(this.#getDefaultLabel());
annotation.updateQuantification();
}
/**
* Create a circle shape to be displayed.
*
* @param {Annotation} annotation The associated annotation.
* @param {Style} style The drawing style.
* @returns {Konva.Group} The Konva group.
*/
createShapeGroup(annotation, style) {
// konva group
const group = new Konva.Group();
group.name(this.getGroupName());
group.visible(true);
group.id(annotation.id);
// konva shape
const shape = this.#createShape(annotation, style);
group.add(this.#createShape(annotation, style));
// konva label
const label = this.#labelFactory.create(annotation, style);
group.add(this.#labelFactory.create(annotation, style));
// label-shape connector
const connectorsPos = this.#getConnectorsPositions(shape);
group.add(this.#labelFactory.getConnector(connectorsPos, label, style));
// konva shadow (if debug)
if (DRAW_DEBUG) {
group.add(this.#getDebugShadow(annotation));
}
return group;
}
/**
* Get the connectors positions for the shape.
*
* @param {Konva.Circle} shape The associated shape.
* @returns {Point2D[]} The connectors positions.
*/
#getConnectorsPositions(shape) {
const centerX = shape.x();
const centerY = shape.y();
const radius = shape.radius() * Math.sqrt(2) / 2;
return [
new Point2D(centerX - radius, centerY - radius),
new Point2D(centerX + radius, centerY - radius),
new Point2D(centerX - radius, centerY + radius),
new Point2D(centerX + radius, centerY + radius),
];
}
/**
* Get the anchors positions for the shape.
*
* @param {Konva.Circle} shape The associated shape.
* @returns {Point2D[]} The anchor positions.
*/
#getAnchorsPositions(shape) {
const centerX = shape.x();
const centerY = shape.y();
const radius = shape.radius();
return [
new Point2D(centerX - radius, centerY),
new Point2D(centerX + radius, centerY),
new Point2D(centerX, centerY + radius),
new Point2D(centerX, centerY - radius),
];
}
/**
* Get anchors to update a circle shape.
*
* @param {Konva.Circle} shape The associated shape.
* @param {Style} style The application style.
* @returns {Konva.Ellipse[]} A list of anchors.
*/
getAnchors(shape, style) {
const positions = this.#getAnchorsPositions(shape);
const anchors = [];
for (let i = 0; i < positions.length; ++i) {
anchors.push(getDefaultAnchor(
positions[i].getX(),
positions[i].getY(),
'anchor' + i,
style
));
}
return anchors;
}
/**
* Constrain anchor movement.
*
* @param {Konva.Ellipse} anchor The active anchor.
*/
constrainAnchorMove(anchor) {
// parent group
const group = anchor.getParent();
if (!(group instanceof Konva.Group)) {
return;
}
// find special points
const left = getAnchorShape(group, 0);
const right = getAnchorShape(group, 1);
const bottom = getAnchorShape(group, 2);
const top = getAnchorShape(group, 3);
// update 'self' (undo case) and special points
switch (anchor.id()) {
case 'anchor0':
// block y
left.y(right.y());
break;
case 'anchor1':
// block y
right.y(left.y());
break;
case 'anchor2':
// block x
bottom.x(top.x());
break;
case 'anchor3':
// block x
top.x(bottom.x());
break;
default :
logger.error('Unhandled anchor id: ' + anchor.id());
break;
}
}
/**
* Update shape and label on anchor move taking the updated
* annotation as input.
*
* @param {Annotation} annotation The associated annotation.
* @param {Konva.Ellipse} anchor The active anchor.
* @param {Style} style The application style.
*/
updateShapeGroupOnAnchorMove(annotation, anchor, style) {
// parent group
const group = anchor.getParent();
if (!(group instanceof Konva.Group)) {
return;
}
// update shape and anchors
this.#updateShape(annotation, anchor, style);
// update label
this.updateLabelContent(annotation, group, style);
// label position
if (typeof annotation.labelPosition === 'undefined') {
// update label position if default position
this.#labelFactory.updatePosition(annotation, group);
} else {
// update connector if not default position
this.updateConnector(group);
}
// update shadow
if (DRAW_DEBUG) {
this.#updateDebugShadow(annotation, group);
}
}
/**
* Update an annotation on anchor move.
*
* @param {Annotation} annotation The annotation.
* @param {Konva.Shape} anchor The anchor.
*/
updateAnnotationOnAnchorMove(annotation, anchor) {
// math shape
const circle = annotation.mathShape;
const center = new Point2D(
circle.getCenter().getX(),
circle.getCenter().getY()
);
const anchorPoint = new Point2D(anchor.x(), anchor.y());
const newRadius = center.getDistance(anchorPoint);
annotation.mathShape = new Circle(center, newRadius);
// quantification
annotation.updateQuantification();
}
/**
* Update an annotation on translation (shape move).
*
* @param {Annotation} annotation The annotation.
* @param {object} translation The translation.
*/
updateAnnotationOnTranslation(annotation, translation) {
// math shape
const circle = annotation.mathShape;
const center = circle.getCenter();
const newCenter = new Point2D(
center.getX() + translation.x,
center.getY() + translation.y
);
annotation.mathShape = new Circle(newCenter, circle.getRadius());
// quantification
annotation.updateQuantification();
}
/**
* Update the shape label.
*
* @param {Annotation} annotation The associated annotation.
* @param {Konva.Group} group The shape group.
* @param {Style} _style The application style.
*/
updateLabelContent(annotation, group, _style) {
this.#labelFactory.updateContent(annotation, group);
}
/**
* Update the shape connector.
*
* @param {Konva.Group} group The shape group.
*/
updateConnector(group) {
const kshape = this.#getShape(group);
const connectorsPos = this.#getConnectorsPositions(kshape);
this.#labelFactory.updateConnector(group, connectorsPos);
}
/**
* Calculate the mathematical shape from a list of points.
*
* @param {Point2D[]} points The points that define the shape.
* @returns {Circle} The mathematical shape.
*/
#calculateMathShape(points) {
// calculate radius
const a = Math.abs(points[0].getX() - points[1].getX());
const b = Math.abs(points[0].getY() - points[1].getY());
const radius = Math.round(Math.sqrt(a * a + b * b));
// physical shape
return new Circle(points[0], radius);
}
/**
* Get the default labels.
*
* @returns {object} The label list.
*/
#getDefaultLabel() {
return defaults.labelText.circle;
}
/**
* Creates the konva shape.
*
* @param {Annotation} annotation The associated annotation.
* @param {Style} style The drawing style.
* @returns {Konva.Circle} The konva shape.
*/
#createShape(annotation, style) {
const circle = annotation.mathShape;
// konva circle
return new Konva.Circle({
x: circle.getCenter().getX(),
y: circle.getCenter().getY(),
radius: circle.getRadius(),
stroke: annotation.colour,
strokeWidth: style.getStrokeWidth(),
strokeScaleEnabled: false,
name: 'shape'
});
}
/**
* Get the associated shape from a group.
*
* @param {Konva.Group} group The group to look into.
* @returns {Konva.Circle|undefined} The shape.
*/
#getShape(group) {
const kshape = group.getChildren(isNodeNameShape)[0];
if (!(kshape instanceof Konva.Circle)) {
return;
}
return kshape;
}
/**
* Get the default annotation label position.
*
* @param {Annotation} annotation The annotation.
* @returns {Point2D} The position.
*/
#getDefaultLabelPosition(annotation) {
const circle = annotation.mathShape;
const center = circle.getCenter();
const radius = circle.getRadius();
return new Point2D(
center.getX() - radius,
center.getY() + radius,
);
}
/**
* Update shape and label on anchor move taking the updated
* annotation as input.
*
* @param {Annotation} annotation The associated annotation.
* @param {Konva.Ellipse} anchor The active anchor.
* @param {Style} _style The application style.
*/
#updateShape(annotation, anchor, _style) {
const circle = annotation.mathShape;
const center = circle.getCenter();
const radius = circle.getRadius();
// parent group
const group = anchor.getParent();
if (!(group instanceof Konva.Group)) {
return;
}
// associated shape
const kcircle = this.#getShape(group);
// update shape: just update the radius
kcircle.radius(radius);
// find anchors
const left = getAnchorShape(group, 0);
const right = getAnchorShape(group, 1);
const bottom = getAnchorShape(group, 2);
const top = getAnchorShape(group, 3);
const swapX = right.x() < left.x() ? -1 : 1;
const swapY = top.y() < bottom.y() ? 1 : -1;
// update 'self' (undo case) and other anchors
switch (anchor.id()) {
case 'anchor0':
// update self
left.x(anchor.x());
// update others
right.x(center.getX() + swapX * radius);
bottom.y(center.getY() + radius);
top.y(center.getY() - radius);
break;
case 'anchor1':
// update self
right.x(anchor.x());
// update others
left.x(center.getX() - swapX * radius);
bottom.y(center.getY() + radius);
top.y(center.getY() - radius);
break;
case 'anchor2':
// update self
bottom.y(anchor.y());
// update others
left.x(center.getX() - radius);
right.x(center.getX() + radius);
top.y(center.getY() - swapY * radius);
break;
case 'anchor3':
// update self
top.y(anchor.y());
// update others
left.x(center.getX() - radius);
right.x(center.getX() + radius);
bottom.y(center.getY() + swapY * radius);
break;
default :
logger.error('Unhandled anchor id: ' + anchor.id());
break;
}
}
/**
* Get the debug shadow.
*
* @param {Annotation} annotation The annotation to shadow.
* @param {Konva.Group} [group] The associated group.
* @returns {Konva.Group|undefined} The shadow konva group.
*/
#getDebugShadow(annotation, group) {
const circle = annotation.mathShape;
// possible group offset
let offsetX = 0;
let offsetY = 0;
if (typeof group !== 'undefined') {
offsetX = group.x();
offsetY = group.y();
}
const kshadow = new Konva.Group();
kshadow.name('shadow');
const regions = circle.getRound();
for (let i = 0; i < regions.length; ++i) {
const region = regions[i];
const minX = region[0][0];
const minY = region[0][1];
const maxX = region[1][0];
const pixelLine = new Konva.Rect({
x: minX - offsetX,
y: minY - offsetY,
width: maxX - minX,
height: 1,
fill: 'grey',
strokeWidth: 0,
strokeScaleEnabled: false,
opacity: 0.3,
name: 'shadow-element'
});
kshadow.add(pixelLine);
}
return kshadow;
}
/**
* Update the debug shadow.
*
* @param {Annotation} annotation The annotation to shadow.
* @param {Konva.Group} group The associated group.
*/
#updateDebugShadow(annotation, group) {
const kshadow = group.getChildren(function (node) {
return node.name() === 'shadow';
})[0];
if (typeof kshadow !== 'undefined') {
// remove previous
kshadow.destroy();
// add new
group.add(this.#getDebugShadow(annotation, group));
}
}
} // class CircleFactory