/*
* @(#)DiamondFigure.java
*
* Copyright (c) 1996-2010 The authors and contributors of JHotDraw.
* You may not use, copy or modify this file, except in compliance with the
* accompanying license terms.
*/
package org.jhotdraw.draw;
import org.jhotdraw.draw.connector.ChopDiamondConnector;
import org.jhotdraw.draw.connector.Connector;
import java.awt.*;
import java.awt.geom.*;
import org.jhotdraw.geom.Geom;
/**
* A {@link Figure} with a diamond shape.
* <p>
* The diamond vertices are located at the midpoints of its enclosing rectangle.
*
*
* @author Werner Randelshofer
* @version $Id$
*/
public class DiamondFigure extends AbstractAttributedFigure {
private static final long serialVersionUID = 1L;
/**
* If the attribute IS_QUADRATIC is put to true, all sides of the diamond have the same length.
*/
public static final AttributeKey<Boolean> IS_QUADRATIC = new AttributeKey<Boolean>("isQuadratic", Boolean.class, false);
/**
* The bounds of the diamond figure.
*/
private Rectangle2D.Double rectangle;
/**
* Creates a new instance.
*/
public DiamondFigure() {
this(0, 0, 0, 0);
}
public DiamondFigure(double x, double y, double width, double height) {
rectangle = new Rectangle2D.Double(x, y, width, height);
/*
setFillColor(Color.white);
setStrokeColor(Color.black);
*/
}
// DRAWING
@Override
protected void drawFill(Graphics2D g) {
Rectangle2D.Double r = (Rectangle2D.Double) rectangle.clone();
if (get(IS_QUADRATIC)) {
double side = Math.max(r.width, r.height);
r.x -= (side - r.width) / 2;
r.y -= (side - r.height) / 2;
r.width = r.height = side;
}
double grow = AttributeKeys.getPerpendicularFillGrowth(this, AttributeKeys.getScaleFactorFromGraphics(g));
if (grow != 0d) {
double w = r.width / 2d;
double h = r.height / 2d;
double lineLength = Math.sqrt(w * w + h * h);
double scale = grow / lineLength;
double yb = scale * w;
double xa = scale * h;
double growx, growy;
growx = ((yb * yb) / xa + xa);
growy = ((xa * xa) / yb + yb);
Geom.grow(r, growx, growy);
}
Path2D.Double diamond = new Path2D.Double();
diamond.moveTo((r.x + r.width / 2), r.y);
diamond.lineTo((r.x + r.width), (r.y + r.height / 2));
diamond.lineTo((r.x + r.width / 2), (r.y + r.height));
diamond.lineTo(r.x, (r.y + r.height / 2));
diamond.closePath();
g.fill(diamond);
}
@Override
protected void drawStroke(Graphics2D g) {
Rectangle2D.Double r = (Rectangle2D.Double) rectangle.clone();
if (get(IS_QUADRATIC)) {
double side = Math.max(r.width, r.height);
r.x -= (side - r.width) / 2;
r.y -= (side - r.height) / 2;
r.width = r.height = side;
}
double grow = AttributeKeys.getPerpendicularDrawGrowth(this, AttributeKeys.getScaleFactorFromGraphics(g));
if (grow != 0d) {
double growx, growy;
double w = r.width / 2d;
double h = r.height / 2d;
double lineLength = Math.sqrt(w * w + h * h);
double scale = grow / lineLength;
double yb = scale * w;
double xa = scale * h;
growx = ((yb * yb) / xa + xa);
growy = ((xa * xa) / yb + yb);
Geom.grow(r, growx, growy);
}
Path2D.Double diamond = new Path2D.Double();
diamond.moveTo((r.x + r.width / 2), r.y);
diamond.lineTo((r.x + r.width), (r.y + r.height / 2));
diamond.lineTo((r.x + r.width / 2), (r.y + r.height));
diamond.lineTo(r.x, (r.y + r.height / 2));
diamond.closePath();
g.draw(diamond);
}
// SHAPE AND BOUNDS
@Override
public Rectangle2D.Double getBounds() {
Rectangle2D.Double bounds = (Rectangle2D.Double) rectangle.clone();
return bounds;
}
@Override
public Rectangle2D.Double getDrawingArea() {
Rectangle2D.Double r = (Rectangle2D.Double) rectangle.clone();
if (get(IS_QUADRATIC)) {
double side = Math.max(r.width, r.height);
r.x -= (side - r.width) / 2;
r.y -= (side - r.height) / 2;
r.width = r.height = side;
}
double grow = AttributeKeys.getPerpendicularHitGrowth(this, 1.0);
if (grow != 0d) {
double w = r.width / 2d;
double h = r.height / 2d;
double lineLength = Math.sqrt(w * w + h * h);
double scale = grow / lineLength;
double yb = scale * w;
double xa = scale * h;
double growx, growy;
growx = ((yb * yb) / xa + xa);
growy = ((xa * xa) / yb + yb);
Geom.grow(r, growx, growy);
}
return r;
}
/**
* Checks if a Point2D.Double is inside the figure.
*/
@Override
public boolean contains(Point2D.Double p) {
Rectangle2D.Double r = (Rectangle2D.Double) rectangle.clone();
if (get(IS_QUADRATIC)) {
double side = Math.max(r.width, r.height);
r.x -= (side - r.width) / 2;
r.y -= (side - r.height) / 2;
r.width = r.height = side;
}
// if (r.contains(p)) {
double grow = AttributeKeys.getPerpendicularFillGrowth(this, 1.0);
if (grow != 0d) {
double w = r.width / 2d;
double h = r.height / 2d;
double lineLength = Math.sqrt(w * w + h * h);
double scale = grow / lineLength;
double yb = scale * w;
double xa = scale * h;
double growx, growy;
growx = ((yb * yb) / xa + xa);
growy = ((xa * xa) / yb + yb);
Geom.grow(r, growx, growy);
}
Path2D.Double diamond = new Path2D.Double();
diamond.moveTo((r.x + r.width / 2), r.y);
diamond.lineTo((r.x + r.width), (r.y + r.height / 2));
diamond.lineTo((r.x + r.width / 2), (r.y + r.height));
diamond.lineTo(r.x, (r.y + r.height / 2));
diamond.closePath();
return diamond.contains(p);
}
@Override
public void setBounds(Point2D.Double anchor, Point2D.Double lead) {
rectangle.x = Math.min(anchor.x, lead.x);
rectangle.y = Math.min(anchor.y, lead.y);
rectangle.width = Math.max(0.1, Math.abs(lead.x - anchor.x));
rectangle.height = Math.max(0.1, Math.abs(lead.y - anchor.y));
}
/**
* Moves the Figure to a new location.
*
* @param tx the transformation matrix.
*/
@Override
public void transform(AffineTransform tx) {
Point2D.Double anchor = getStartPoint();
Point2D.Double lead = getEndPoint();
setBounds(
(Point2D.Double) tx.transform(anchor, anchor),
(Point2D.Double) tx.transform(lead, lead));
}
@Override
public void restoreTransformTo(Object geometry) {
Rectangle2D.Double r = (Rectangle2D.Double) geometry;
rectangle.x = r.x;
rectangle.y = r.y;
rectangle.width = r.width;
rectangle.height = r.height;
}
@Override
public Object getTransformRestoreData() {
return rectangle.clone();
}
// ATTRIBUTES
// EDITING
// CONNECTING
/**
* Returns the Figures connector for the specified location. By default a ChopDiamondConnector
* is returned.
*
* @see ChopDiamondConnector
*/
@Override
public Connector findConnector(Point2D.Double p, ConnectionFigure prototype) {
return new ChopDiamondConnector(this);
}
@Override
public Connector findCompatibleConnector(Connector c, boolean isStart) {
return new ChopDiamondConnector(this);
}
// COMPOSITE FIGURES
// CLONING
@Override
public DiamondFigure clone() {
DiamondFigure that = (DiamondFigure) super.clone();
that.rectangle = (Rectangle2D.Double) this.rectangle.clone();
return that;
}
// EVENT HANDLING
}