/*=========================================================================

  Program:   FusionViewer
  Module:    $RCSfile: RectangleROIMouseTool.java,v $
  Language:  Java
  Date:      $Date: 2007/02/02 19:25:27 $
  Version:   $Revision: 1.2 $
  
  Copyright (c) Insightful Corporation.  All rights reserved.
  See Copyright.txt for details.
  
  This software is distributed WITHOUT ANY WARRANTY; without even
  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  PURPOSE.  See the above copyright notice for more information.

=========================================================================*/

package org.fusionviewer.display;

import java.awt.Point;
import java.awt.event.MouseEvent;

/**\class RectangleROIMouseTool
 *\brief Construct a rectagle ROI responding to Mouse events
 */
public class RectangleROIMouseTool implements MouseTool {
	private ImageSliceView m_parent;
	private Point m_anchor = new Point();
	private Point m_tempPoint = new Point();

	public RectangleROIMouseTool(ImageSliceView parent) {
		m_parent = parent;
	}
	
	public boolean canHandle(MouseEvent e) {
		m_tempPoint.setLocation(e.getX(), e.getY());
		m_parent.transformPoint(m_tempPoint);

		if ((m_tempPoint.x < 0) || (m_tempPoint.y < 0) ||
				(m_tempPoint.x >= m_parent.getViewWidth()) ||
				(m_tempPoint.y >= m_parent.getViewHeight()))
			return false;

		return true;
	}

	public void mousePressed(MouseEvent e) {
		m_anchor.setLocation(e.getX(), e.getY());
		m_parent.transformPoint(m_anchor);
		m_tempPoint.setLocation(m_anchor.x, m_anchor.y);
		dragCorner(m_tempPoint);
	}

	public void mouseReleased(MouseEvent e) {
		m_parent.releaseMouseTool();
	}

	public void mouseDragged(MouseEvent e) {
		m_tempPoint.setLocation(e.getX(), e.getY());
		m_parent.transformPoint(m_tempPoint);
		dragCorner(m_tempPoint);
	}

	public void mouseMoved(MouseEvent e) {
	}

	private void dragCorner(Point position) {
		float x = (float) position.getX();
		float y = (float) position.getY();
		
		if (x < 0)
			x = 0;
		if (y < 0)
			y = 0;
		if (x >= m_parent.getViewWidth())
			x = m_parent.getViewWidth() - 1;
		if (y >= m_parent.getViewHeight())
			y = m_parent.getViewHeight() - 1;
		
		m_tempPoint.setLocation(x, y);		
		m_parent.getParent().display();
	}
	
	public Point getAnchor1() {
		return new Point(m_anchor);
	}
	
	public Point getAnchor2() {
		return new Point(m_tempPoint);
	}
}