LCircleArc.java

/*
 * This file is part of LaTeXDraw.
 * Copyright (c) 2005-2017 Arnaud BLOUIN
 * LaTeXDraw is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later version.
 * LaTeXDraw is distributed without any warranty; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 */
package net.sf.latexdraw.models.impl;

import java.util.Arrays;
import java.util.List;
import javafx.beans.property.DoubleProperty;
import javafx.beans.property.ObjectProperty;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.beans.property.SimpleObjectProperty;
import net.sf.latexdraw.models.MathUtils;
import net.sf.latexdraw.models.ShapeFactory;
import net.sf.latexdraw.models.interfaces.prop.IArcProp;
import net.sf.latexdraw.models.interfaces.shape.ArcStyle;
import net.sf.latexdraw.models.interfaces.shape.IArrow;
import net.sf.latexdraw.models.interfaces.shape.ICircleArc;
import net.sf.latexdraw.models.interfaces.shape.ILine;
import net.sf.latexdraw.models.interfaces.shape.IPoint;
import net.sf.latexdraw.models.interfaces.shape.IShape;

/**
 * An implementation of the circle arc.
 * @author Arnaud Blouin
 */
class LCircleArc extends LSquaredShape implements ICircleArc, LArrowableShape {
	private final List<IArrow> arrows;
	/** The style of the arc. */
	private final ObjectProperty<ArcStyle> style;
	/** The start angle of the arc. In radian. */
	private final DoubleProperty startAngle;
	/** The end angle of the arc. In radian. */
	private final DoubleProperty endAngle;


	LCircleArc(final IPoint tl, final double width) {
		super(tl, width);
		arrows = Arrays.asList(ShapeFactory.INST.createArrow(this), ShapeFactory.INST.createArrow(this));
		style = new SimpleObjectProperty<>(ArcStyle.ARC);
		startAngle = new SimpleDoubleProperty(0d);
		endAngle = new SimpleDoubleProperty(3d * Math.PI / 2d);
	}

	@Override
	public void copy(final IShape sh) {
		super.copy(sh);
		if(sh instanceof IArcProp) {
			final IArcProp arc = (IArcProp) sh;
			startAngle.set(arc.getAngleStart());
			endAngle.set(arc.getAngleEnd());
			style.set(arc.getArcStyle());
		}
	}

	@Override
	public IPoint getCenter() {
		return getGravityCentre();
	}

	@Override
	public double getRadius() {
		return getWidth() / 2d;
	}

	@Override
	public ILine getArrowLine(final IArrow arrow) {
		if(getArrowAt(0) == arrow) {
			return MathUtils.INST.getTangenteAt(getTopLeftPoint(), getBottomRightPoint(), getGravityCentre(), getAngleStart(),
				getAngleStart() < Math.PI);
		}
		if(getArrowAt(1) == arrow) {
			return MathUtils.INST.getTangenteAt(getTopLeftPoint(), getBottomRightPoint(), getGravityCentre(), getAngleEnd(),
				getAngleEnd() >= Math.PI);
		}
		return null;
	}

	@Override
	public boolean isShowPtsable() {
		return true;
	}

	@Override
	public double getAngleEnd() {
		return endAngle.get();
	}

	@Override
	public double getAngleStart() {
		return startAngle.get();
	}

	@Override
	public IPoint getEndPoint() {
		final IPoint grav = getGravityCentre();
		return ShapeFactory.INST.createPoint(grav.getX() + Math.cos(getAngleEnd()) * getHeight() / 2d,
			grav.getY() - Math.sin(getAngleEnd()) * getHeight() / 2d);
	}

	@Override
	public IPoint getStartPoint() {
		final IPoint grav = getGravityCentre();
		return ShapeFactory.INST.createPoint(grav.getX() + Math.cos(getAngleStart()) * getWidth() / 2d,
			grav.getY() - Math.sin(getAngleStart()) * getWidth() / 2d);
	}

	@Override
	public ArcStyle getArcStyle() {
		return style.get();
	}

	@Override
	public void setAngleEnd(final double angle) {
		if(MathUtils.INST.isValidCoord(angle)) {
			endAngle.set(angle);
		}
	}

	@Override
	public void setAngleStart(final double angle) {
		if(MathUtils.INST.isValidCoord(angle)) {
			startAngle.set(angle);
		}
	}

	@Override
	public void setArcStyle(ArcStyle arcStyle) {
		if(arcStyle != null) {
			style.set(arcStyle);
		}
	}

	@Override
	public List<IArrow> getArrows() {
		return arrows;
	}

	@Override
	public ObjectProperty<ArcStyle> arcStyleProperty() {
		return style;
	}

	@Override
	public DoubleProperty angleStartProperty() {
		return startAngle;
	}

	@Override
	public DoubleProperty angleEndProperty() {
		return endAngle;
	}
}