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//******************************************************************************
//
// File: ShapeItem.java
// Package: edu.rit.draw.item
// Unit: Class edu.rit.draw.item.ShapeItem
//
// This Java source file is copyright (C) 2008 by Alan Kaminsky. All rights
// reserved. For further information, contact the author, Alan Kaminsky, at
// ark@cs.rit.edu.
//
// This Java source file is part of the Parallel Java Library ("PJ"). PJ 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 3 of the License, or (at your option) any later version.
//
// PJ is distributed in the hope that it will be useful, but 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.
//
// Linking this library statically or dynamically with other modules is making a
// combined work based on this library. Thus, the terms and conditions of the
// GNU General Public License cover the whole combination.
//
// As a special exception, the copyright holders of this library give you
// permission to link this library with independent modules to produce an
// executable, regardless of the license terms of these independent modules, and
// to copy and distribute the resulting executable under terms of your choice,
// provided that you also meet, for each linked independent module, the terms
// and conditions of the license of that module. An independent module is a
// module which is not derived from or based on this library. If you modify this
// library, you may extend this exception to your version of the library, but
// you are not obligated to do so. If you do not wish to do so, delete this
// exception statement from your version.
//
// A copy of the GNU General Public License is provided in the file gpl.txt. You
// may also obtain a copy of the GNU General Public License on the World Wide
// Web at http://www.gnu.org/licenses/gpl.html.
//
//******************************************************************************
package edu.rit.draw.item;
import edu.rit.draw.Drawing;
import java.awt.Graphics2D;
import java.awt.Shape;
/**
* Class ShapeItem is the abstract base class for a {@linkplain DrawingItem}
* that consists of a single 2-D graphics shape with an outline and an interior.
*
* @author Alan Kaminsky
* @version 23-Jun-2008
*/
public abstract class ShapeItem
extends FilledItem
{
// Hidden data members.
private static final long serialVersionUID = -6592516179733916611L;
// Exported constructors.
/**
* Construct a new shape item.
*/
public ShapeItem()
{
super();
}
/**
* Construct a new shape item with the same outline and fill paint as the
* given shape item.
*
* @param theItem Shape item.
*
* @exception NullPointerException
* (unchecked exception) Thrown if <TT>theItem</TT> is null.
*/
public ShapeItem
(ShapeItem theItem)
{
super (theItem);
}
// Exported operations.
/**
* Set this shape item's outline.
*
* @param theOutline Outline, or <TT>Outline.NONE</TT>.
*
* @return This shape item.
*/
public ShapeItem outline
(Outline theOutline)
{
doOutline (theOutline);
return this;
}
/**
* Set this shape item's fill paint.
*
* @param theFill Fill paint, or <TT>Fill.NONE</TT>.
*
* @return This shape item.
*/
public ShapeItem fill
(Fill theFill)
{
doFill (theFill);
return this;
}
/**
* Add this shape item to the end of the default drawing's sequence of
* drawing items.
*
* @return This shape item.
*
* @exception NullPointerException
* (unchecked exception) Thrown if there is no default drawing.
*
* @see Drawing#defaultDrawing()
*/
public ShapeItem add()
{
doAdd (Drawing.defaultDrawing());
return this;
}
/**
* Add this shape item to the end of the given drawing's sequence of drawing
* items.
*
* @param theDrawing Drawing.
*
* @return This shape item.
*
* @exception NullPointerException
* (unchecked exception) Thrown if <TT>theDrawing</TT> is null.
*/
public ShapeItem add
(Drawing theDrawing)
{
doAdd (theDrawing);
return this;
}
/**
* Add this shape item to the beginning of the default drawing's sequence
* of drawing items.
*
* @return This shape item.
*
* @exception NullPointerException
* (unchecked exception) Thrown if there is no default drawing.
*
* @see Drawing#defaultDrawing()
*/
public ShapeItem addFirst()
{
doAddFirst (Drawing.defaultDrawing());
return this;
}
/**
* Add this shape item to the beginning of the given drawing's sequence of
* drawing items.
*
* @param theDrawing Drawing.
*
* @return This shape item.
*
* @exception NullPointerException
* (unchecked exception) Thrown if <TT>theDrawing</TT> is null.
*/
public ShapeItem addFirst
(Drawing theDrawing)
{
doAddFirst (theDrawing);
return this;
}
/**
* Draw this drawing item in the given graphics context. This method is
* allowed to change the graphics context's paint, stroke, and transform,
* and it doesn't have to change them back.
*
* @param g2d 2-D graphics context.
*/
public void draw
(Graphics2D g2d)
{
super.draw (g2d);
Shape shape = getShape();
if (myFill != null)
{
myFill.setGraphicsContext (g2d);
g2d.fill (shape);
}
if (myOutline != null)
{
myOutline.setGraphicsContext (g2d);
g2d.draw (shape);
}
}
// Hidden operations.
/**
* Determine the 2-D graphics shape that this shape object will draw.
*
* @return Shape.
*/
abstract Shape getShape();
}
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