import {DRAW_DEBUG} from './draw';
import {getDefaultAnchor} from './editor';
import {Ellipse} from '../math/ellipse';
import {Point2D} from '../math/point';
import {logger} from '../utils/logger';
import {getFlags, replaceFlags} from '../utils/string';
// external
import Konva from 'konva';
/**
* Default draw label text.
*/
const defaultEllipseLabelText = '{surface}';
/**
* 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 {object} 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 {Array} points The points from which to extract the ellipse.
* @param {object} style The drawing style.
* @param {object} viewController The associated view controller.
* @returns {object} 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 = '';
// TODO: allow override?
// if (typeof ellipseLabelText !== 'undefined') {
// textExpr = ellipseLabelText;
// } else {
textExpr = defaultEllipseLabelText;
// }
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(),
y: ellipse.getCenter().getY(),
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 {object} shape The associated shape.
* @param {object} style The application style.
* @returns {Array} 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 - radius.y, 'topLeft', style
));
anchors.push(getDefaultAnchor(
ellipseX + radius.x, ellipseY - radius.y, 'topRight', style
));
anchors.push(getDefaultAnchor(
ellipseX + radius.x, ellipseY + radius.y, 'bottomRight', style
));
anchors.push(getDefaultAnchor(
ellipseX - radius.x, ellipseY + radius.y, 'bottomLeft', style
));
return anchors;
}
/**
* Update an ellipse shape.
*
* @param {object} anchor The active anchor.
* @param {object} _style The app style.
* @param {object} viewController The associated view controller.
*/
update(anchor, _style, viewController) {
// parent group
const group = anchor.getParent();
// associated shape
const kellipse = group.getChildren(function (node) {
return node.name() === 'shape';
})[0];
// associated label
const klabel = group.getChildren(function (node) {
return node.name() === 'label';
})[0];
// find special points
const topLeft = group.getChildren(function (node) {
return node.id() === 'topLeft';
})[0];
const topRight = group.getChildren(function (node) {
return node.id() === 'topRight';
})[0];
const bottomRight = group.getChildren(function (node) {
return node.id() === 'bottomRight';
})[0];
const bottomLeft = group.getChildren(function (node) {
return node.id() === 'bottomLeft';
})[0];
// debug shadow
let kshadow;
if (DRAW_DEBUG) {
kshadow = group.getChildren(function (node) {
return node.name() === 'shadow';
})[0];
}
// update 'self' (undo case) and special points
switch (anchor.id()) {
case 'topLeft':
topLeft.x(anchor.x());
topLeft.y(anchor.y());
topRight.y(anchor.y());
bottomLeft.x(anchor.x());
break;
case 'topRight':
topRight.x(anchor.x());
topRight.y(anchor.y());
topLeft.y(anchor.y());
bottomRight.x(anchor.x());
break;
case 'bottomRight':
bottomRight.x(anchor.x());
bottomRight.y(anchor.y());
bottomLeft.y(anchor.y());
topRight.x(anchor.x());
break;
case 'bottomLeft':
bottomLeft.x(anchor.x());
bottomLeft.y(anchor.y());
bottomRight.y(anchor.y());
topLeft.x(anchor.x());
break;
default :
logger.error('Unhandled anchor id: ' + anchor.id());
break;
}
// update shape
const radiusX = (topRight.x() - topLeft.x()) / 2;
const radiusY = (bottomRight.y() - topRight.y()) / 2;
const center = {
x: topLeft.x() + radiusX,
y: topRight.y() + radiusY
};
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, y: center.y};
klabel.position(textPos);
// update quantification
this.#updateEllipseQuantification(group, viewController);
}
/**
* Update the quantification of an Ellipse.
*
* @param {object} group The group with the shape.
* @param {object} 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 {object} group The group with the shape.
* @param {object} viewController The associated view controller.
*/
#updateEllipseQuantification(group, viewController) {
// associated shape
const kellipse = group.getChildren(function (node) {
return node.name() === 'shape';
})[0];
// associated label
const klabel = group.getChildren(function (node) {
return node.name() === 'label';
})[0];
// 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();
const quantification = ellipse.quantify(
viewController,
getFlags(ktext.meta.textExpr));
ktext.setText(replaceFlags(ktext.meta.textExpr, quantification));
// update meta
ktext.meta.quantification = quantification;
}
/**
* Get the debug shadow.
*
* @param {Ellipse} ellipse The ellipse to shadow.
* @param {object} group The associated group.
* @returns {object} 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