conectedmouseeventhandler.java

NetGUI v0.4.1 INSTALL Instructions Pedro de la

/*
 * Copyright (C) 2005, 2006 
 * Santiago Carot Nemesio
 *
 * This file is part of NetGUI.
 *
 * NetGUI is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * NetGUI 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.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with NetGUI; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *  
 */

import java.awt.*;
import java.awt.Dimension;
import java.awt.event.InputEvent;
import java.awt.event.MouseEvent;
import java.awt.geom.Point2D;
import java.util.*;

import javax.swing.*;

import edu.umd.cs.piccolo.*;
import edu.umd.cs.piccolo.PCanvas;
import edu.umd.cs.piccolo.nodes.*;
import edu.umd.cs.piccolox.*;
import edu.umd.cs.piccolox.nodes.*;
import edu.umd.cs.piccolo.event.*;
import edu.umd.cs.piccolo.util.*;

public class ConectedMouseEventHandler extends PBasicInputEventHandler
{
	private LayersHandler handler;
	private PCanvas canvas;
	private boolean iconClicked = false;
	private boolean block = false;
	private PPath line;	
	private NKNode node1, node2;
	
	public ConectedMouseEventHandler (PCanvas aCanvas, LayersHandler lHandler)
	{
		super();
		canvas = aCanvas;
		handler = lHandler;
	}
	
	public void mouseClicked (PInputEvent e)
		{
			super.mouseClicked(e);
			if (e.getButton() == MouseEvent.BUTTON1) 
				processClick (e);
			else if (e.getButton() == MouseEvent.BUTTON3)
				cancelCurrentConexion();
		}
	
	public void mouseMoved (PInputEvent e)
	{
		super.mouseMoved(e);
		if (iconClicked && !block){
			updateLine(e);
			}
	}
	
	public void mouseEntered(PInputEvent e) 
		{
			super.mouseEntered(e);
			//canvas.setCursor(new Cursor(Cursor.CROSSHAIR_CURSOR));
			if (e.getPickedNode() instanceof NKNode)
				{				
				if (iconClicked)
					processCurrentSituation(e, false);
				else
					((NKNode)e.getPickedNode()).setSelectedImage();
				}
				
		}
	
	public void mouseExited(PInputEvent e)
		{
			super.mouseExited(e);
			if ((!iconClicked) && (e.getPickedNode() instanceof NKNode))
				((NKNode)e.getPickedNode()).setNormalImage();
			if ((iconClicked) && (e.getPickedNode() instanceof NKNode))
				if (!node1.equals((NKNode)e.getPickedNode()))
					{
					((NKNode)e.getPickedNode()).setNormalImage();
					updateLine(e);
					block = false;
					}
		}
		
	public void cancelCurrentConexion ()
	{
		if (iconClicked)
			{
				canvas.getLayer().removeChild(line);
				node1.setNormalImage();
				line = null;
				iconClicked = false;
				block = false;
			}
	}
	
	private void updateLine (PInputEvent aEvent)
	{
		Point2D start = node1.getFullBoundsReference().getCenter2D();
		Point2D end = aEvent.getPosition();
		line.reset();
		line.moveTo((float)start.getX(), (float)start.getY());
		line.lineTo((float)end.getX(), (float)end.getY());
	}
	
	private void updateNodeLine (PInputEvent aEvent)
	{
		Point2D start = node1.getFullBoundsReference().getCenter2D();
		Point2D end = ((NKNode)aEvent.getPickedNode()).getFullBoundsReference().getCenter2D();
		line.reset();
		line.moveTo((float)start.getX(), (float)start.getY());
		line.lineTo((float)end.getX(), (float)end.getY());
	}
	
	private void firstClickSate (PInputEvent event)
	{
		node1 = (NKNode)event.getPickedNode();
		iconClicked = true;
		line = new PPath();
		updateLine(event);
		canvas.getLayer().addChild(line);
	}
	
	private void secondClickSate (PInputEvent event)
	{
		node2 = (NKNode)event.getPickedNode();
		canvas.getLayer().removeChild(line);
		line = null;
		iconClicked = false;
		block = false;
	}
	
	private void processClick (PInputEvent aEvent)
	{
		if (aEvent.getPickedNode() instanceof NKNode )
			if (!iconClicked)
				//Primer click
				firstClickSate(aEvent);
			else
				//segundo click (creamos una conexion) 
				processCurrentSituation(aEvent, true);
	}
	
	private void processConnectNormalSituation (PInputEvent aEvent, boolean click)
	{
		if (aEvent.getPickedNode() instanceof NKHub)
		{
			if (!click){ 
				((NKNode)aEvent.getPickedNode()).setSelectedImage();
				blockLine(aEvent);
				}
			else {
				secondClickSate(aEvent);
				handler.addConnection(node1,node2);
				}
		}
	}
	
	private void processRoutersConnectSituation (PInputEvent aEvent, boolean click)
	{
		if (aEvent.getPickedNode() instanceof NKRouter)
			if (!click){ 
				((NKNode)aEvent.getPickedNode()).setSelectedImage();
				blockLine(aEvent);
				}
			else {
				secondClickSate(aEvent);
				handler.addConnection(node1,node2);
				}
		else processConnectNormalSituation (aEvent, click);
	}

	private void processCurrentSituation (PInputEvent aEvent, boolean click)
	{
		if (!node1.equals((NKNode)aEvent.getPickedNode()))
			//El nodo seleccionado es distinto del que se ha "pinchado" anteriormente
			if (node1 instanceof NKCompaq)
			    	//Es un terminal, en tal caso s�o se permite su conexion a un hub
				processConnectNormalSituation(aEvent, click);
			if (node1 instanceof NKRouter)
				//Los routers pueden conectarse tanto a hubs como a otros routers
				processRoutersConnectSituation(aEvent, click);
			else if (node1 instanceof NKHub)
				{
				//El elemento seleccionado anteriormente es un Hub, en tal caso s�o se
				//permite su conexion a un router o a un terminal
				if ((aEvent.getPickedNode() instanceof NKRouter) ||
					(aEvent.getPickedNode() instanceof NKCompaq))
					if (!click) {
						blockLine(aEvent);
						((NKNode)aEvent.getPickedNode()).setSelectedImage();
						}
					else {
						secondClickSate(aEvent);
						handler.addConnection(node1, node2);
						}
				}
	}
	
	private void blockLine(PInputEvent aEvent)
	{
		block = true;
		updateNodeLine(aEvent);
	}
}