sectors3dpanel.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.jaba.panels;

import jmt.engine.jaba.Sector3D;
import jmt.engine.jaba.newPoint;
import jmt.engine.jaba.grahamScan;

import javax.swing.*;
import java.awt.*;
import java.awt.event.MouseMotionAdapter;
import java.awt.event.MouseEvent;
import java.awt.geom.AffineTransform;
import java.awt.geom.Line2D;
import java.util.Vector;
import java.util.TreeSet;
import java.util.Iterator;
import java.text.DecimalFormat;

/**
 * <p>Title: Sectors 3D Panel</p>
 * <p>Description: This panel is used to show saturation sectors on 3-class models.</p>
 * <p>This was heavily modified by Bertoli Marco to allow smart label positioning and
 * skipping if too many labels must be shown on the image. Now it allows resizing too.</p>
 *
 * @author Bertoli Marco, Zanzottera Andrea
 *         Date: 8-feb-2006
 *         Time: 11.42.37
 */
public class Sectors3DPanel extends JPanel {
    // Colors for sectors and lines
    private static final Color SINGLE = new Color(255,200,0);
    private static final Color DOUBLE = new Color(255,150,75);
    private static final Color MORE = new Color(192,0,0);
    private static final Color LINESINGLE = Color.gray;
    private static final Color LINEDOUBLE = Color.CYAN;
    private static final Color LINEMORE = Color.BLUE;
    private static final Color BLACK  = new Color(0,0,0);
    private static final Color GREY = new Color(100,100,100);
    // Background
    private static final Color BGCOLOR = new Color(255,255,255);
    // Stroke styles
    private static final BasicStroke LABEL_LINE = new BasicStroke(2);
    private static final BasicStroke SECTORS = new BasicStroke(1);
    private static final BasicStroke LINES = new BasicStroke(1);
    // Constants
    private final double rad3 = Math.sqrt(3);
    private final double rad3d2 = Math.sqrt(3) / 2;
    private final double rad3d3 = Math.sqrt(3) / 3;
    // Used to format numbers
    private static final DecimalFormat formatter = new DecimalFormat("0.000");
    // Resulta data and class names
    private Vector s3d;
    private String[] classNames;

    // Used to immagazine traslation coordinates
    private double traslationX, traslationY;

    // Tells if graph is shown
    private boolean isShown = false;
    // Stores height of the graph
    private int height;

    // Label to show coordinates
    private JLabel coordLabel;

    /**
     * Builds a new Sectors3D Panel to show results of 3-class models
     * @param s3d results vector
     * @param classNames array with class names
     */
    public Sectors3DPanel(Vector s3d, String[] classNames){
        super(new BorderLayout());
        this.s3d = s3d;
        this.classNames = classNames;
        this.setBackground(BGCOLOR);
        this.setBorder(BorderFactory.createEtchedBorder());

        // Label to show coordinates
        coordLabel = new JLabel();
        coordLabel.setBorder(BorderFactory.createEtchedBorder());
        coordLabel.setVisible(false);
        coordLabel.setOpaque(true);
        // Puts label on south-east corner
        JPanel tmp = new JPanel(new BorderLayout());
        tmp.add(coordLabel, BorderLayout.EAST);
        tmp.setOpaque(false);
        this.add(tmp, BorderLayout.SOUTH);

        // Adds a mouseListener to show graph coordinates
        this.addMouseMotionListener(new MouseMotionAdapter() {
            public void mouseMoved(MouseEvent e) {
                if (isShown) {
                    String coord = getCoordinates(e.getX(), e.getY());
                    if (coord != null) {
                        coordLabel.setText(coord);
                        coordLabel.setVisible(true);
                        Sectors3DPanel.this.setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));
                    }
                    else {
                        coordLabel.setText("");
                        coordLabel.setVisible(false);
                        Sectors3DPanel.this.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
                    }
                }
            }
        });
    }

    /**
     * Overrides default paint method to draw graph
     * @param g graphic object. <b>Must</b> be an instance of Graphics2D
     */
    public void paint(Graphics g)
    {
        isShown = false;
        // This is the height of the graph

        super.paint(g);
        Graphics2D g2;

        // If g is not instance of Graphic2D, aborts method
        if (g instanceof Graphics2D)
            g2 = (Graphics2D) g;
        else
            return;

        Color sectorcolor;

        int maxStationNameWidth = (int)g2.getFontMetrics().getStringBounds("StationX", g2).getWidth();

        int limitHeight, limitWidth;

        limitHeight = (int)(getHeight()*7.5/10.0);
        limitWidth = (int)(((getWidth() / rad3) - maxStationNameWidth * 3 - 20)*.95);

        height = (limitHeight < limitWidth)? limitHeight: limitWidth;

        // If height is too small, aborts paint
        if (height < 20)
            return;

        // Sets traslation coordinates
        traslationX = .1 * height + 15;
        traslationY = getHeight() - height * 0.1 - 10;

        // Now traslates image
        AffineTransform aT = g2.getTransform();
        aT.setToTranslation(.1 * height + 15, getHeight() - height * 0.1 - 10);
        g2.transform(aT);

        // Cambia lo Stroke e il colore per evidenziare la linea
        g2.setStroke(SECTORS);

        // Disegna lo sfondo del triangolo
        int[] xt = {0,(int)Math.floor(rad3d2*height),(int)Math.floor(rad3*height)};
        int[] yt = {0,-1*height,0};
        g2.setColor(SINGLE);
        g2.fillPolygon(xt,yt,3);

        if (s3d != null) {
            // Used to sort label ascendingly by position
            TreeSet labels = new TreeSet();

            // per ogni settore
            for (int i=0;i<s3d.size();i++)
            {
                Sector3D sector = (Sector3D)s3d.get(i);
                //System.out.println("Totale: "+s3d.size()+", Parziale: "+i);
                // Sono le coordinate dei punti che saranno passati al metodo fillPolygon
                int[] xxp = new int[sector.CountPoint()];
                int[] yyp = new int[sector.CountPoint()];

                Vector points = new Vector();

                // per ogni punto di un settore
                for (int j=0;j<sector.CountPoint();j++)
                {

                    double pb11 = sector.getx(j);
                    double pb12 = sector.gety(j);

                    int pb1 = (int)Math.floor(pb11*height);
                    int pb2 = (int)Math.floor(pb12*height);

                    //Aggiungo il punto al vettore da passare al Grahamscan
                    newPoint temp = new newPoint(pb1,pb2);
                    points.addElement(temp);
                }

                //Coloro il settore in base al numero di stazioni che vi saturano
                int numstat = sector.getType();
                if (numstat>2)
                {
                    sectorcolor = MORE;
                }
                else if (numstat==2)
                {
                    sectorcolor = DOUBLE;
                }
                else sectorcolor = SINGLE;

                grahamScan gr = new grahamScan();
                Vector ordpoint = gr.doGraham(points);

                for (int j=0;j<ordpoint.size();j++)
                {
                    xxp[j]=((newPoint)ordpoint.get(j)).x;
                    yyp[j]=-((newPoint)ordpoint.get(j)).y;
                }