/* $Id: SelectionMessage.java 18860 2010-11-30 07:22:31Z mvw $
 *****************************************************************************
 * Copyright (c) 2009-2010 Contributors - see below
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Bob Tarling
 *    Christian L\u00f3pez Esp\u00ednola
 *****************************************************************************
 *
 * Some portions of this file was previously release using the BSD License:
 */

// Copyright (c) 2007 The Regents of the University of California. All
// Rights Reserved. Permission to use, copy, modify, and distribute this
// software and its documentation without fee, and without a written
// agreement is hereby granted, provided that the above copyright notice
// and this paragraph appear in all copies. This software program and
// documentation are copyrighted by The Regents of the University of
// California. The software program and documentation are supplied "AS
// IS", without any accompanying services from The Regents. The Regents
// does not warrant that the operation of the program will be
// uninterrupted or error-free. The end-user understands that the program
// was developed for research purposes and is advised not to rely
// exclusively on the program for any reason. IN NO EVENT SHALL THE
// UNIVERSITY OF CALIFORNIA 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 UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
// SUCH DAMAGE. THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
// PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
// CALIFORNIA HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT,
// UPDATES, ENHANCEMENTS, OR MODIFICATIONS.

package org.argouml.sequence2.diagram;

import java.awt.event.KeyEvent;
import java.awt.event.MouseEvent;
import java.util.List;

import org.apache.log4j.Logger;
import org.argouml.uml.diagram.ui.FigEdgeModelElement;
import org.argouml.uml.diagram.ui.SelectionRerouteEdge;
import org.tigris.gef.presentation.Fig;
import org.tigris.gef.presentation.Handle;

/**
 * A custom select object to handle the special requirements of
 * rerouting, reshaping or dragging a message.
 * @author penyaskito
 */
class SelectionMessage extends SelectionRerouteEdge {

    /**
     * Logger.
     */
    private static final Logger LOG =
        Logger.getLogger(SelectionMessage.class);

    /**
     * The constructor
     * @param feme the fig.
     */
    public SelectionMessage(FigEdgeModelElement feme) {
        super(feme);
    }
    
    @Override
    public void keyPressed(KeyEvent ke) {
        if (ke.getKeyCode() == KeyEvent.VK_LEFT 
                || ke.getKeyCode() == KeyEvent.VK_RIGHT) {
            // we don't let the user move the messages horizontally.
            ke.consume();
        } else {
            handleMovement();
        }
    }       
    
    @Override
    public void mousePressed(MouseEvent me) {
	FigMessage message = (FigMessage) getContent(); 
	if (!message.isSelfMessage()) {
	    super.mousePressed(me);
	}
    }

    @Override
    public void dragHandle(int x, int y, int w, int h, Handle handle) {
        FigMessage message = (FigMessage) getContent(); 
        if (message.isSelfMessage()) {
            message.translate(0, y - message.getY());
        } else {
            super.dragHandle(x, y, w, h, handle);
            handleMovement();
        }
        
    }
    
    private void handleMovement() {
        FigMessage figMessage = (FigMessage) getContent();
        FigClassifierRole source = 
            (FigClassifierRole) figMessage.getSourceFigNode();
        FigClassifierRole dest = 
            (FigClassifierRole) figMessage.getDestFigNode();
        
        // if the edge is near the bottom of the classifier roles,
        // we enlarge all the FigClassifierRoles in the diagram.
        if (figMessage.getFinalY() > 
                source.getY() + source.getHeight() - 10) {
            final int newHeight = source.getHeight() + 10;
            final List<Fig> figs = getContent().getLayer().getContents();
                        
            for (Fig workOnFig : figs) {
                if (workOnFig instanceof FigClassifierRole) {
                    workOnFig.setHeight(newHeight);
                }
            }
        }
        
        dest.positionHead(figMessage);
        
        // we recalculate all the activations        
        source.createActivations();        
        if (!figMessage.isSelfMessage()) {
            dest.createActivations();
        }
    }
    
}