/*
  File: ShrinkExpandGraph.java

  Copyright (c) 2006, The Cytoscape Consortium (www.cytoscape.org)

  The Cytoscape Consortium is:
  - Institute for Systems Biology
  - University of California San Diego
  - Memorial Sloan-Kettering Cancer Center
  - Institut Pasteur
  - Agilent Technologies

  This library is free software; you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as published
  by the Free Software Foundation; either version 2.1 of the License, or
  any later version.

  This library 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.  The software and
  documentation provided hereunder is on an "as is" basis, and the
  Institute for Systems Biology and the Whitehead Institute
  have no obligations to provide maintenance, support,
  updates, enhancements or modifications.  In no event shall the
  Institute for Systems Biology and the Whitehead Institute
  be liable to any party for direct, indirect, special,
  incidental or consequential damages, including lost profits, arising
  out of the use of this software and its documentation, even if the
  Institute for Systems Biology and the Whitehead Institute
  have been advised of the possibility of such damage.  See
  the GNU Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with this library; if not, write to the Free Software Foundation,
  Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/

// ShrinkExpandGraph plugin

//--------------------------------------------------------------------------
// $Revision: 9565 $
// $Date: 2007-02-13 13:36:50 -0600 (Tue, 13 Feb 2007) $
// $Author: mes $
//--------------------------------------------------------------------------
package cytoscape.dialogs;

import cytoscape.Cytoscape;

import cytoscape.util.CytoscapeAction;

import cytoscape.view.CyNetworkView;

import giny.view.*;

//--------------------------------------------------------------------------
import java.awt.event.ActionEvent;

import java.util.*;

import javax.swing.AbstractAction;


/**
 * This class shifts the nodes to shrink or expand the graph:
 * it averages the coordinates of all the nodes to find the center
 * it translates the graph to a center at (0,0)
 * it multiplies each node coordinate by a factor m
 * it translates the graph back to the original center
 */
public class ShrinkExpandGraph extends CytoscapeAction {
	protected double m;

	ShrinkExpandGraph(String change, double m) {
		super(change);
		setPreferredMenu("Layout");
		this.m = m;
	}

	/**
	 *  DOCUMENT ME!
	 *
	 * @param e DOCUMENT ME!
	 */
	public void actionPerformed(ActionEvent e) {
		// sum of coordinates
		double sx = 0;
		double sy = 0;

		// coordinates of center of graph
		double cx = 0;
		double cy = 0;

		// coordinates with graph centered at (0,0)
		double nx;
		double ny;

		CyNetworkView parent = Cytoscape.getCurrentNetworkView();

		//loop through each node to add up all x and all y coordinates
		for (Iterator i = parent.getNodeViewsIterator(); i.hasNext();) {
			NodeView nodeView = (NodeView) i.next();

			// get coordinates of node
			double ax = nodeView.getXPosition();
			double ay = nodeView.getYPosition();
			// sum up coordinates of all the nodes
			sx += ax;
			sy += ay;
		}

		// set new coordinates of each node at center (0,0), shrink, then return to
		// original center at (cx, cy)
		for (Iterator i = parent.getNodeViewsIterator(); i.hasNext();) {
			NodeView nodeView = (NodeView) i.next();
			nodeView.setXPosition((m * ((nodeView.getXPosition()) - cx)) + cx);
			nodeView.setYPosition((m * ((nodeView.getYPosition()) - cy)) + cy);
		}

		// remove bends
		for (Iterator i = parent.getEdgeViewsIterator(); i.hasNext();) {
			EdgeView edgeView = (EdgeView) i.next();
			edgeView.getBend().removeAllHandles();
		}
	} //Action Performed
} //ShrinkExpandGraph class