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

  Program:   FusionViewer
  Module:    $RCSfile: WindowLevelMouseTool.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.event.MouseEvent;

import org.fusionviewer.model.ImageDisplayModel;



/**\class WindowLevelMouseTool
 *\brief Changes the window and level settings in response to mouse drags horizontally
 * and vertically.
 */
public class WindowLevelMouseTool implements MouseTool {
	private ImageSliceView m_parent;
	
	public WindowLevelMouseTool(ImageSliceView parent) {
		m_parent = parent;
	}
	
	public boolean canHandle(MouseEvent e) {
		if ((e.getButton() == MouseEvent.BUTTON1) && e.isShiftDown())
			return true;
		else
			return false;
	}

	public void mousePressed(MouseEvent e) {
		setWindowLevel(e);
	}

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

	public void mouseDragged(MouseEvent e) {
		setWindowLevel(e);
	}
	
	private void setWindowLevel(MouseEvent e) {
		ImageDisplayModel model = m_parent.getViewModel();
		int plane = e.isAltDown() ? 1 : 0;

		float window = (float) e.getX() / (float) (m_parent.getViewWidth() - 1) * model.getPixelRange(plane);
		float level = (float) e.getY() / (float) (m_parent.getViewHeight() - 1) *
						model.getPixelRange(plane) + model.getMinValue(plane);
		
		model.setWindowLevel(plane, window, level);
	}

	public void mouseMoved(MouseEvent e) {
	}

}