blockingregion.java

一个用于排队系统仿真的开源软件,有非常形象的图象仿真过程!

/**
 * Copyright (C) 2006, Laboratorio di Valutazione delle Prestazioni - Politecnico di Milano

 * This program 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.

 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
package jmt.gui.jmodel.JGraphMod;

import jmt.gui.jmodel.controller.Mediator;
import org.jgraph.graph.DefaultGraphCell;
import org.jgraph.graph.GraphConstants;

import javax.swing.*;
import javax.swing.border.TitledBorder;
import java.awt.*;


/**
 * <p>Title: Blocking Region Component</p>
 * <p>Description: This component is used to describe a blocking region inside a graph.
 * </p>
 *
 * @author Bertoli Marco
 *         Date: 23-mar-2006
 *         Time: 14.15.00
 */
public class BlockingRegion extends DefaultGraphCell {
    // Reference to Mediator
    private Mediator mediator;
    // Search's key for this blocking region
    private Object key;
    // Name of this region
    private String name;
    // border with name of this region
    private TitledBorder titledBorder;

    /**
     * Creates a new blocking region cell to be placed inside current graph
     * @param mediator reference to current mediator
     * @param key search's key for this region
     */
    public BlockingRegion(Mediator mediator, Object key) {
        this.mediator = mediator;
        this.key = key;
        name = mediator.getBlockingRegionDefinition().getRegionName(key);
        setLayout();
    }

    /**
     * Define apparence of this component
     */
    private void setLayout() {
        GraphConstants.setSizeable(attributes, false);
        GraphConstants.setGroupOpaque(attributes, true);
        GraphConstants.setOpaque(attributes, true);
        GraphConstants.setGradientColor(attributes, new Color(.1F, .1F, .9F, .3F));
        titledBorder = BorderFactory.createTitledBorder(" "+name+" ");
        GraphConstants.setBorder(attributes, titledBorder);
        GraphConstants.setInset(attributes, 15);
        GraphConstants.setEditable(attributes, false);
    }

    /**
     * Adds a list of station to this blocking region and inserts this into current graph
     * @param cells cells to be added
     */
    public void addStations(Object[] cells) {
        mediator.getGraph().getGraphLayoutCache().insertGroup(this, cells);
        // Resets parent for added cells
        for (int i=0; i<cells.length; i++)
            if (cells[i] instanceof JmtCell)
                ((JmtCell)cells[i]).resetParent();
    }

    /**
     * Return search's key for this component
     * @return search's key for this blocking station
     */
    public Object getKey() {
        return key;
    }

    /**
     * Whenever name of this cell is asked, controls if displayed name is correct.
     * if it's not, changes it. This is a bit dirty but avoids to add a special listener
     * to this component that will be even more dirty.
     * @return an empty String
     */
    public String toString() {
        String newName = mediator.getBlockingRegionDefinition().getRegionName(key);
        if (newName != null && !newName.equals(name)) {
            titledBorder.setTitle(" "+newName+" ");
            name = newName;
        }

        return "";
    }
}