import {Ellipse} from '../math/ellipse';
import {Point2D} from '../math/point';
import {getFlags, replaceFlags} from '../utils/string';
import {logger} from '../utils/logger';
import {defaults} from '../app/defaults';
import {getDefaultAnchor} from './editor';
import {DRAW_DEBUG} from './draw';
// external
import Konva from 'konva';
// doc imports
/* eslint-disable no-unused-vars */
import {ViewController} from '../app/viewController';
import {Style} from '../gui/style';
/* eslint-enable no-unused-vars */
/**
* Ellipse factory.
*/
export class EllipseFactory {
/**
* Get the name of the shape group.
*
* @returns {string} The name.
*/
getGroupName() {
return 'ellipse-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;
}
/**
* Is the input group a group of this factory?
*
* @param {Konva.Group} group The group to test.
* @returns {boolean} True if the group is from this fcatory.
*/
isFactoryGroup(group) {
return this.getGroupName() === group.name();
}
/**
* Create an ellipse shape to be displayed.
*
* @param {Point2D[]} points The points from which to extract the ellipse.
* @param {Style} style The drawing style.
* @param {ViewController} viewController The associated view controller.
* @returns {Konva.Group} The Konva group.
*/
create(
points, style, viewController) {
// calculate radius
const a = Math.abs(points[0].getX() - points[1].getX());
const b = Math.abs(points[0].getY() - points[1].getY());
// physical shape
const ellipse = new Ellipse(points[0], a, b);
// draw shape
const radius = {x: ellipse.getA(), y: ellipse.getB()};
const kshape = new Konva.Ellipse({
x: ellipse.getCenter().getX(),
y: ellipse.getCenter().getY(),
radius: radius,
radiusX: radius.x,
radiusY: radius.y,
stroke: style.getLineColour(),
strokeWidth: style.getStrokeWidth(),
strokeScaleEnabled: false,
name: 'shape'
});
// quantification
const ktext = new Konva.Text({
fontSize: style.getFontSize(),
fontFamily: style.getFontFamily(),
fill: style.getLineColour(),
padding: style.getTextPadding(),
shadowColor: style.getShadowLineColour(),
shadowOffset: style.getShadowOffset(),
name: 'text'
});
let textExpr = '';
const modality = viewController.getModality();
if (typeof defaults.labelText.ellipse[modality] !== 'undefined') {
textExpr = defaults.labelText.ellipse[modality];
} else {
textExpr = defaults.labelText.ellipse['*'];
}
const quant = ellipse.quantify(
viewController,
getFlags(textExpr));
ktext.setText(replaceFlags(textExpr, quant));
// augment text with meta
// @ts-ignore
ktext.meta = {
textExpr: textExpr,
quantification: quant
};
// label
const klabel = new Konva.Label({
x: ellipse.getCenter().getX() - ellipse.getA(),
y: ellipse.getCenter().getY() + ellipse.getB(),
scale: style.applyZoomScale(1),
visible: textExpr.length !== 0,
name: 'label'
});
klabel.add(ktext);
klabel.add(new Konva.Tag({
fill: style.getLineColour(),
opacity: style.getTagOpacity()
}));
// debug shadow
let kshadow;
if (DRAW_DEBUG) {
kshadow = this.#getShadowEllipse(ellipse);
}
// return group
const group = new Konva.Group();
group.name(this.getGroupName());
if (kshadow) {
group.add(kshadow);
}
group.add(klabel);
group.add(kshape);
group.visible(true); // dont inherit
return group;
}
/**
* Get anchors to update an ellipse shape.
*
* @param {Konva.Ellipse} shape The associated shape.
* @param {Style} style The application style.
* @returns {Konva.Ellipse[]} A list of anchors.
*/
getAnchors(shape, style) {
const ellipseX = shape.x();
const ellipseY = shape.y();
const radius = shape.radius();
const anchors = [];
anchors.push(getDefaultAnchor(
ellipseX - radius.x, ellipseY, 'left', style
));
anchors.push(getDefaultAnchor(
ellipseX + radius.x, ellipseY, 'right', style
));
anchors.push(getDefaultAnchor(
ellipseX, ellipseY + radius.y, 'bottom', style
));
anchors.push(getDefaultAnchor(
ellipseX, ellipseY - radius.y, 'top', style
));
return anchors;
}
/**
* Update an ellipse shape.
*
* @param {Konva.Ellipse} anchor The active anchor.
* @param {Style} _style The app style.
* @param {ViewController} viewController The associated view controller.
*/
update(anchor, _style, viewController) {
// parent group
const group = anchor.getParent();
if (!(group instanceof Konva.Group)) {
return;
}
// associated shape
const kellipse = group.getChildren(function (node) {
return node.name() === 'shape';
})[0];
if (!(kellipse instanceof Konva.Ellipse)) {
return;
}
// associated label
const klabel = group.getChildren(function (node) {
return node.name() === 'label';
})[0];
// find special points
const left = group.getChildren(function (node) {
return node.id() === 'left';
})[0];
const right = group.getChildren(function (node) {
return node.id() === 'right';
})[0];
const bottom = group.getChildren(function (node) {
return node.id() === 'bottom';
})[0];
const top = group.getChildren(function (node) {
return node.id() === 'top';
})[0];
// debug shadow
let kshadow;
if (DRAW_DEBUG) {
kshadow = group.getChildren(function (node) {
return node.name() === 'shadow';
})[0];
}
// ellipse center
const center = {
x: kellipse.x(),
y: kellipse.y()
};
let radiusX;
let radiusY;
// update 'self' (undo case) and special points
switch (anchor.id()) {
case 'left':
radiusX = center.x - anchor.x();
radiusY = top.y() - center.y;
// update self (while blocking y)
left.x(anchor.x());
left.y(right.y());
// update others
right.x(center.x + radiusX);
break;
case 'right':
radiusX = anchor.x() - center.x;
radiusY = top.y() - center.y;
// update self (while blocking y)
right.x(anchor.x());
right.y(left.y());
// update others
left.x(center.x - radiusX);
break;
case 'bottom':
radiusX = center.x - left.x();
radiusY = anchor.y() - center.y;
// update self (while blocking x)
bottom.x(top.x());
bottom.y(anchor.y());
// update others
top.y(center.y - radiusY);
break;
case 'top':
radiusX = center.x - left.x();
radiusY = center.y - anchor.y();
// update self (while blocking x)
top.x(bottom.x());
top.y(anchor.y());
// update others
bottom.y(center.y + radiusY);
break;
default :
logger.error('Unhandled anchor id: ' + anchor.id());
break;
}
// update shape
kellipse.position(center);
const radiusAbs = {
x: Math.abs(radiusX),
y: Math.abs(radiusY)
};
if (radiusAbs) {
kellipse.radius(radiusAbs);
}
// new ellipse
const centerPoint = new Point2D(
group.x() + center.x,
group.y() + center.y
);
const ellipse = new Ellipse(centerPoint, radiusAbs.x, radiusAbs.y);
// debug shadow
if (kshadow) {
// remove previous
kshadow.destroy();
// add new
group.add(this.#getShadowEllipse(ellipse, group));
}
// update label position
const textPos = {
x: center.x - radiusAbs.x,
y: center.y + radiusAbs.y
};
klabel.position(textPos);
// update quantification
this.#updateEllipseQuantification(group, viewController);
}
/**
* Update the quantification of an Ellipse.
*
* @param {Konva.Group} group The group with the shape.
* @param {ViewController} viewController The associated view controller.
*/
updateQuantification(group, viewController) {
this.#updateEllipseQuantification(group, viewController);
}
/**
* Update the quantification of an Ellipse (as a static
* function to be used in update).
*
* @param {Konva.Group} group The group with the shape.
* @param {ViewController} viewController The associated view controller.
*/
#updateEllipseQuantification(group, viewController) {
// associated shape
const kellipse = group.getChildren(function (node) {
return node.name() === 'shape';
})[0];
if (!(kellipse instanceof Konva.Ellipse)) {
return;
}
// associated label
const klabel = group.getChildren(function (node) {
return node.name() === 'label';
})[0];
if (!(klabel instanceof Konva.Label)) {
return;
}
// positions: add possible group offset
const centerPoint = new Point2D(
group.x() + kellipse.x(),
group.y() + kellipse.y()
);
// circle
const ellipse = new Ellipse(
centerPoint, kellipse.radius().x, kellipse.radius().y);
// update text
const ktext = klabel.getText();
// @ts-expect-error
const meta = ktext.meta;
const quantification = ellipse.quantify(
viewController,
getFlags(meta.textExpr));
ktext.setText(replaceFlags(meta.textExpr, quantification));
// update meta
meta.quantification = quantification;
}
/**
* Get the debug shadow.
*
* @param {Ellipse} ellipse The ellipse to shadow.
* @param {Konva.Group} [group] The associated group.
* @returns {Konva.Group} The shadow konva group.
*/
#getShadowEllipse(ellipse, group) {
// 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 = ellipse.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;
}
} // class EllipseFactory