org.piccolo2d.extras.util.PNodeLocator Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2011, Piccolo2D project, http://piccolo2d.org
* Copyright (c) 1998-2008, University of Maryland
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*
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* Redistributions of source code must retain the above copyright notice, this list of conditions
* and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice, this list of conditions
* and the following disclaimer in the documentation and/or other materials provided with the
* distribution.
*
* None of the name of the University of Maryland, the name of the Piccolo2D project, or the names of its
* contributors may be used to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
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package org.piccolo2d.extras.util;
import org.piccolo2d.PNode;
/**
* PNodeLocator provides an abstraction for locating points on a node.
* Points are located in the local corrdinate system of the node. The default
* behavior is to locate the center point of the nodes bounds. The node where
* the point is located is stored internal to this locator (as an instance
* varriable). If you want to use the same locator to locate center points on
* many different nodes you will need to call setNode() before asking for each
* location.
*
*
* @version 1.0
* @author Jesse Grosjean
*/
public class PNodeLocator extends PLocator {
private static final long serialVersionUID = 1L;
/** Node being located by this locator. */
protected PNode node;
/**
* Constructs a locator responsible for locating the given node.
*
* @param node node to be located
*/
public PNodeLocator(final PNode node) {
setNode(node);
}
/**
* Returns the node being located by this locator.
*
* @return node being located by this locator
*/
public PNode getNode() {
return node;
}
/**
* Changes the node being located by this locator.
*
* @param node new node to have this locator locate.
*/
public void setNode(final PNode node) {
this.node = node;
}
/**
* Locates the left of the target node's bounds.
*
* @return left of target node's bounds
*/
public double locateX() {
return node.getBoundsReference().getCenterX();
}
/**
* Locates the top of the target node's bounds.
*
* @return top of target node's bounds
*/
public double locateY() {
return node.getBoundsReference().getCenterY();
}
}