/*
*
*
* Copyright 1990-2007 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* This program 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 version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*/
package com.sun.perseus.model;
import com.sun.perseus.j2d.Transform;
import com.sun.perseus.j2d.Box;
import com.sun.perseus.j2d.PaintDef;
import com.sun.perseus.j2d.PaintServer;
import com.sun.perseus.j2d.PaintTarget;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Vector;
/**
* Abstract base class for all elements which are paint server implementations.
*
* @version $Id: PaintElement.java,v 1.7 2006/06/29 10:47:33 ln156897 Exp $
*/
public abstract class PaintElement extends ElementNode {
/**
* Defines whether the paint is in objectBoundingBox
* space or in userSpaceOnUse space.
*/
boolean isObjectBBox = false;
/**
* An array holding all current references (References instances) to this
* PaintElement.
*/
Vector references = new Vector(1);
/**
* @ownerDocument the DocumentNode this element belongs to.
*/
public PaintElement(final DocumentNode ownerDocument) {
super(ownerDocument);
}
/**
* @param paintType the type of paint for which a PaintServer should be
* computed. (e.g., "fill" or "stroke");
* @param paintTarget the PaintTarget for which the PaintServer should be
* computed.
* @return the PaintDef generated by the server.
*/
public PaintServer getPaintServer(final String paintType,
final PaintTarget paintTarget) {
Reference ref = new Reference();
ref.setPaintTarget(paintType, paintTarget);
return ref;
}
/**
* Notifies all references that the Paint definitions has been modified.
*/
protected void notifyPaintChange() {
final int n = references.size();
for (int i = 0; i < n; i++) {
Reference ref = (Reference) references.elementAt(i);
ref.paintTarget.onPaintServerUpdate(ref.paintType, ref);
}
}
/**
* Computes the paint in user space on use.
*
* @return the computed PaintDef.
*/
protected abstract PaintDef computePaint();
/**
* The Reference class is used to bind a paint property (e.g., fill or
* stroke) to its related PaintElement.
*/
class Reference implements PaintServer {
/**
* The referencing node.
*/
protected PaintTarget paintTarget;
/**
* The referencing paintType.
*/
protected String paintType;
/**
* @return the PaintDef generated by the server.
*/
public PaintDef getPaintDef() {
return computePaint();
}
/**
* @param paintType a key that the PaintTarget can use to characterize
* its interest in the PaintServer. For example, a PaintTarget
* may be interested in the Paint both for stroking and filling
* purposes.
* @param paintTarget the PaintServerTarget listening to changes to the
* paint generated by this PaintServer.
*/
public void setPaintTarget(final String paintType,
final PaintTarget paintTarget) {
this.paintType = paintType;
this.paintTarget = paintTarget;
references.addElement(this);
}
/**
* Called when the PaintServer is no longer used.
*/
public void dispose() {
references.removeElement(this);
}
}
}
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