/*
* @(#)TriangleFigure.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.geom.GrowStroke;
import org.jhotdraw.geom.Geom;
import org.jhotdraw.geom.BezierPath;
import org.jhotdraw.draw.connector.ChopTriangleConnector;
import org.jhotdraw.draw.handle.OrientationHandle;
import org.jhotdraw.draw.handle.Handle;
import org.jhotdraw.draw.connector.Connector;
import java.awt.*;
import java.awt.geom.*;
import java.util.*;
import static org.jhotdraw.draw.AttributeKeys.*;
/**
* Implements a {@link Figure} with a triangular shape.
* <p>
* The tip of the triangle points in the direction specified by the attribute
* {@link org.jhotdraw.draw.AttributeKeys#ORIENTATION}.
* <p>
* This figure creates a {@link OrientationHandle} which allows to interactively change the
* orientation of the triangle.
*
* @author Werner Randelshofer
* @version $Id$
*/
public class TriangleFigure extends AbstractAttributedFigure {
private static final long serialVersionUID = 1L;
/**
* The bounds of the triangle figure.
*/
private Rectangle2D.Double rectangle;
/**
* Creates a new instance.
*/
public TriangleFigure() {
this(0, 0, 0, 0);
}
public TriangleFigure(Orientation direction) {
this(0, 0, 0, 0, direction);
}
public TriangleFigure(double x, double y, double width, double height) {
this(x, y, width, height, Orientation.NORTH);
}
public TriangleFigure(double x, double y, double width, double height, Orientation direction) {
rectangle = new Rectangle2D.Double(x, y, width, height);
set(ORIENTATION, direction);
}
// DRAWING
// SHAPE AND BOUNDS
// ATTRIBUTES
// EDITING
// CONNECTING
/**
* Returns the Figures connector for the specified location. By default a
* {@link org.jhotdraw.draw.connector.ChopTriangleConnector} is returned.
*/
@Override
public Connector findConnector(Point2D.Double p, ConnectionFigure prototype) {
return new ChopTriangleConnector(this);
}
/**
* Returns a compatible connector. By default a
* {@link org.jhotdraw.draw.connector.ChopTriangleConnector} is returned.
*/
@Override
public Connector findCompatibleConnector(Connector c, boolean isStartConnector) {
return new ChopTriangleConnector(this);
}
// COMPOSITE FIGURES
// CLONING
// EVENT HANDLING
@Override
public Rectangle2D.Double getBounds() {
Rectangle2D.Double bounds = (Rectangle2D.Double) rectangle.clone();
return bounds;
}
@Override
protected void drawFill(Graphics2D g) {
double scaleFactor = AttributeKeys.getScaleFactorFromGraphics(g);
Shape triangle = getBezierPath();
double grow = AttributeKeys.getPerpendicularFillGrowth(this, scaleFactor);
if (grow != 0d) {
GrowStroke gs = new GrowStroke((float) grow,
(float) (AttributeKeys.getStrokeTotalWidth(this, scaleFactor)
* get(STROKE_MITER_LIMIT))
);
triangle = gs.createStrokedShape(triangle);
}
g.fill(triangle);
}
@Override
protected void drawStroke(Graphics2D g) {
double scaleFactor = AttributeKeys.getScaleFactorFromGraphics(g);
Shape triangle = getBezierPath();
double grow = AttributeKeys.getPerpendicularDrawGrowth(this, scaleFactor);
if (grow != 0d) {
GrowStroke gs = new GrowStroke((float) grow,
(float) (AttributeKeys.getStrokeTotalWidth(this, scaleFactor)
* get(STROKE_MITER_LIMIT))
);
triangle = gs.createStrokedShape(triangle);
}
g.draw(triangle);
}
@Override
public Collection<Handle> createHandles(int detailLevel) {
LinkedList<Handle> handles = (LinkedList<Handle>) super.createHandles(detailLevel);
if (detailLevel == 0) {
handles.add(new OrientationHandle(this));
}
return handles;
}
public BezierPath getBezierPath() {
Rectangle2D.Double r = (Rectangle2D.Double) rectangle.clone();
BezierPath triangle = new BezierPath();
switch (get(ORIENTATION)) {
case NORTH:
default:
triangle.moveTo((float) (r.x + r.width / 2), (float) r.y);
triangle.lineTo((float) (r.x + r.width), (float) (r.y + r.height));
triangle.lineTo((float) r.x, (float) (r.y + r.height));
break;
case NORTH_EAST:
triangle.moveTo((float) (r.x), (float) r.y);
triangle.lineTo((float) (r.x + r.width), (float) (r.y));
triangle.lineTo((float) (r.x + r.width), (float) (r.y + r.height));
break;
case EAST:
triangle.moveTo((float) (r.x), (float) (r.y));
triangle.lineTo((float) (r.x + r.width), (float) (r.y + r.height / 2d));
triangle.lineTo((float) r.x, (float) (r.y + r.height));
break;
case SOUTH_EAST:
triangle.moveTo((float) (r.x + r.width), (float) (r.y));
triangle.lineTo((float) (r.x + r.width), (float) (r.y + r.height));
triangle.lineTo((float) (r.x), (float) (r.y + r.height));
break;
case SOUTH:
triangle.moveTo((float) (r.x + r.width / 2), (float) (r.y + r.height));
triangle.lineTo((float) r.x, (float) r.y);
triangle.lineTo((float) (r.x + r.width), (float) r.y);
break;
case SOUTH_WEST:
triangle.moveTo((float) (r.x + r.width), (float) (r.y + r.height));
triangle.lineTo((float) (r.x), (float) (r.y + r.height));
triangle.lineTo((float) (r.x), (float) (r.y));
break;
case WEST:
triangle.moveTo((float) (r.x), (float) (r.y + r.height / 2));
triangle.lineTo((float) (r.x + r.width), (float) (r.y));
triangle.lineTo((float) (r.x + r.width), (float) (r.y + r.height));
break;
case NORTH_WEST:
triangle.moveTo((float) (r.x), (float) (r.y + r.height));
triangle.lineTo((float) (r.x), (float) (r.y));
triangle.lineTo((float) (r.x + r.width), (float) (r.y));
break;
}
triangle.setClosed(true);
return triangle;
}
/**
* Checks if a Point2D.Double is inside the figure.
*/
@Override
public boolean contains(Point2D.Double p) {
Shape triangle = getBezierPath();
double grow = AttributeKeys.getPerpendicularHitGrowth(this, 1.0);
if (grow != 0d) {
GrowStroke gs = new GrowStroke((float) grow,
(float) (AttributeKeys.getStrokeTotalWidth(this, 1.0)
* get(STROKE_MITER_LIMIT))
);
triangle = gs.createStrokedShape(triangle);
}
return triangle.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));
}
@Override
public Rectangle2D.Double getDrawingArea() {
double totalStrokeWidth = AttributeKeys.getStrokeTotalWidth(this, 1.0);
double width = 0d;
if (get(STROKE_COLOR) != null) {
switch (get(STROKE_PLACEMENT)) {
case INSIDE:
width = 0d;
break;
case OUTSIDE:
if (get(STROKE_JOIN) == BasicStroke.JOIN_MITER) {
width = totalStrokeWidth * get(STROKE_MITER_LIMIT);
} else {
width = totalStrokeWidth;
}
break;
case CENTER:
if (get(STROKE_JOIN) == BasicStroke.JOIN_MITER) {
width = totalStrokeWidth / 2d * get(STROKE_MITER_LIMIT);
} else {
width = totalStrokeWidth / 2d;
}
break;
}
}
width++;
Rectangle2D.Double r = getBounds();
Geom.grow(r, width, width);
return r;
}
public Point2D.Double chop(Point2D.Double p) {
Shape triangle = getBezierPath();
double grow = AttributeKeys.getPerpendicularHitGrowth(this, 1.0);
if (grow != 0d) {
GrowStroke gs = new GrowStroke((float) grow,
(float) (AttributeKeys.getStrokeTotalWidth(this, 1.0)
* get(STROKE_MITER_LIMIT))
);
triangle = gs.createStrokedShape(triangle);
}
return Geom.chop(triangle, p);
}
/**
* 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 TriangleFigure clone() {
TriangleFigure that = (TriangleFigure) super.clone();
that.rectangle = (Rectangle2D.Double) this.rectangle.clone();
return that;
}
@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();
}
}