/*
* @(#)SVGEllipse.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.samples.svg.figures;
import org.jhotdraw.geom.Geom;
import org.jhotdraw.geom.GrowStroke;
import javax.annotation.Nullable;
import org.jhotdraw.draw.handle.TransformHandleKit;
import org.jhotdraw.draw.handle.ResizeHandleKit;
import org.jhotdraw.draw.handle.Handle;
import java.awt.*;
import java.awt.geom.*;
import java.util.*;
import org.jhotdraw.draw.*;
import org.jhotdraw.draw.handle.BoundsOutlineHandle;
import static org.jhotdraw.samples.svg.SVGAttributeKeys.*;
import org.jhotdraw.samples.svg.Gradient;
import org.jhotdraw.samples.svg.SVGAttributeKeys;
/**
* SVGEllipse represents a SVG ellipse and a SVG circle element.
*
* @author Werner Randelshofer
* @version $Id$
*/
public class SVGEllipseFigure extends SVGAttributedFigure implements SVGFigure {
private static final long serialVersionUID = 1L;
private Ellipse2D.Double ellipse;
/**
* This is used to perform faster drawing and hit testing.
*/
@Nullable private transient Shape cachedTransformedShape;
/**
* This is used to perform faster hit testing.
*/
@Nullable private transient Shape cachedHitShape;
/** Creates a new instance. */
public SVGEllipseFigure() {
this(0, 0, 0, 0);
}
public SVGEllipseFigure(double x, double y, double width, double height) {
ellipse = new Ellipse2D.Double(x, y, width, height);
SVGAttributeKeys.setDefaults(this);
setConnectable(false);
}
// DRAWING
@Override
protected void drawFill(Graphics2D g) {
if (ellipse.width > 0 && ellipse.height > 0) {
g.fill(ellipse);
}
}
@Override
protected void drawStroke(Graphics2D g) {
if (ellipse.width > 0 && ellipse.height > 0) {
g.draw(ellipse);
}
}
// SHAPE AND BOUNDS
public double getX() {
return ellipse.x;
}
public double getY() {
return ellipse.y;
}
public double getWidth() {
return ellipse.getWidth();
}
public double getHeight() {
return ellipse.getHeight();
}
@Override
public Rectangle2D.Double getBounds() {
return (Rectangle2D.Double) ellipse.getBounds2D();
}
@Override
public Rectangle2D.Double getDrawingArea() {
Rectangle2D rx = getTransformedShape().getBounds2D();
Rectangle2D.Double r = (rx instanceof Rectangle2D.Double) ? (Rectangle2D.Double) rx : new Rectangle2D.Double(rx.getX(), rx.getY(), rx.getWidth(), rx.getHeight());
if (get(TRANSFORM) == null) {
double g = SVGAttributeKeys.getPerpendicularHitGrowth(this, 1.0) * 2d + 1;
Geom.grow(r, g, g);
} else {
double strokeTotalWidth = AttributeKeys.getStrokeTotalWidth(this, 1.0);
double width = strokeTotalWidth / 2d;
width *= Math.max(get(TRANSFORM).getScaleX(), get(TRANSFORM).getScaleY()) + 1;
Geom.grow(r, width, width);
}
return r;
}
/**
* Checks if a Point2D.Double is inside the figure.
*/
@Override
public boolean contains(Point2D.Double p) {
return getHitShape().contains(p);
}
private Shape getTransformedShape() {
if (cachedTransformedShape == null) {
if (get(TRANSFORM) == null) {
cachedTransformedShape = ellipse;
} else {
cachedTransformedShape = get(TRANSFORM).createTransformedShape(ellipse);
}
}
return cachedTransformedShape;
}
private Shape getHitShape() {
if (cachedHitShape == null) {
if (get(FILL_COLOR) != null || get(FILL_GRADIENT) != null) {
cachedHitShape = new GrowStroke(
(float) SVGAttributeKeys.getStrokeTotalWidth(this, 1.0) / 2f,
(float) SVGAttributeKeys.getStrokeTotalMiterLimit(this, 1.0)).createStrokedShape(getTransformedShape());
} else {
cachedHitShape = SVGAttributeKeys.getHitStroke(this, 1.0).createStrokedShape(getTransformedShape());
}
}
return cachedHitShape;
}
@Override
public void setBounds(Point2D.Double anchor, Point2D.Double lead) {
ellipse.x = Math.min(anchor.x, lead.x);
ellipse.y = Math.min(anchor.y, lead.y);
ellipse.width = Math.max(0.1, Math.abs(lead.x - anchor.x));
ellipse.height = Math.max(0.1, Math.abs(lead.y - anchor.y));
invalidate();
}
/**
* Transforms the figure.
*
* @param tx the transformation.
*/
@Override
public void transform(AffineTransform tx) {
if (get(TRANSFORM) != null ||
(tx.getType() & (AffineTransform.TYPE_TRANSLATION)) != tx.getType()) {
if (get(TRANSFORM) == null) {
TRANSFORM.setClone(this, tx);
} else {
AffineTransform t = TRANSFORM.getClone(this);
t.preConcatenate(tx);
set(TRANSFORM, t);
}
} else {
Point2D.Double anchor = getStartPoint();
Point2D.Double lead = getEndPoint();
setBounds(
(Point2D.Double) tx.transform(anchor, anchor),
(Point2D.Double) tx.transform(lead, lead));
if (get(FILL_GRADIENT) != null &&
!get(FILL_GRADIENT).isRelativeToFigureBounds()) {
Gradient g = FILL_GRADIENT.getClone(this);
g.transform(tx);
set(FILL_GRADIENT, g);
}
if (get(STROKE_GRADIENT) != null &&
!get(STROKE_GRADIENT).isRelativeToFigureBounds()) {
Gradient g = STROKE_GRADIENT.getClone(this);
g.transform(tx);
set(STROKE_GRADIENT, g);
}
}
invalidate();
}
@Override
public void restoreTransformTo(Object geometry) {
Object[] restoreData = (Object[]) geometry;
ellipse = (Ellipse2D.Double) ((Ellipse2D.Double) restoreData[0]).clone();
TRANSFORM.setClone(this, (AffineTransform) restoreData[1]);
FILL_GRADIENT.setClone(this, (Gradient) restoreData[2]);
STROKE_GRADIENT.setClone(this, (Gradient) restoreData[3]);
invalidate();
}
@Override
public Object getTransformRestoreData() {
return new Object[]{
ellipse.clone(),
TRANSFORM.getClone(this),
FILL_GRADIENT.getClone(this),
STROKE_GRADIENT.getClone(this),};
}
// ATTRIBUTES
// EDITING
@Override
public Collection<Handle> createHandles(int detailLevel) {
LinkedList<Handle> handles = new LinkedList<Handle>();
switch (detailLevel % 2) {
case -1: // Mouse hover handles
handles.add(new BoundsOutlineHandle(this, false, true));
break;
case 0:
ResizeHandleKit.addResizeHandles(this, handles);
handles.add(new LinkHandle(this));
break;
case 1:
TransformHandleKit.addTransformHandles(this, handles);
break;
default:
break;
}
return handles;
}
// CONNECTING
// COMPOSITE FIGURES
// CLONING
@Override
public SVGEllipseFigure clone() {
SVGEllipseFigure that = (SVGEllipseFigure) super.clone();
that.ellipse = (Ellipse2D.Double) this.ellipse.clone();
that.cachedTransformedShape = null;
return that;
}
// EVENT HANDLING
@Override
public boolean isEmpty() {
Rectangle2D.Double b = getBounds();
return b.width <= 0 || b.height <= 0;
}
@Override
public void invalidate() {
super.invalidate();
cachedTransformedShape = null;
cachedHitShape = null;
}
}