graphBonds.java

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package textoSecreto;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.util.Random;

import javax.swing.JPanel;

/**
 *
 * @author danielsalnikov
 */
public class graphBonds extends JPanel {

    private double [] values;
    private String [] names;
    private String title;

    Color colors []= new Color []{Color.BLUE,Color.CYAN,Color.GREEN,Color.MAGENTA,Color.YELLOW,Color.ORANGE};

    public graphBonds(double[] d, String [] n, String t) {
        this.values = d;
        this.names = n;
        this.title = t;
    }

    @Override
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        if (values == null || values.length == 0) {
      return;
    }
 
    double minValue = 0;
    double maxValue = 0;
    for (int i = 0; i < values.length; i++) {
      if (minValue > values[i]) {
        minValue = values[i];
      }
      if (maxValue < values[i]) {
        maxValue = values[i];
      }
    }
 
    Dimension dim = getSize();
    int panelWidth = dim.width;
    int panelHeight = dim.height;
    int barWidth = panelWidth / values.length;
 
    Font titleFont = new Font("Book Antiqua", Font.BOLD, 15);
    FontMetrics titleFontMetrics = g.getFontMetrics(titleFont);
 
    Font labelFont = new Font("Book Antiqua", Font.PLAIN, 14);
    FontMetrics labelFontMetrics = g.getFontMetrics(labelFont);
 
    int titleWidth = titleFontMetrics.stringWidth(title);
    int stringHeight = titleFontMetrics.getAscent();
    int stringWidth = (panelWidth - titleWidth) / 2;
    g.setFont(titleFont);
    g.drawString(title, stringWidth, stringHeight);
 
    int top = titleFontMetrics.getHeight();
    int bottom = labelFontMetrics.getHeight();
    if (maxValue == minValue) {
      return;
    }
    double scale = (panelHeight - top - bottom) / (maxValue - minValue);
    stringHeight = panelHeight - labelFontMetrics.getDescent();
    g.setFont(labelFont);
    for (int j = 0; j < values.length; j++) {
      int valueP = j * barWidth + 1;
      int valueQ = top;
      int height = (int) (values[j] * scale);
      if (values[j] >= 0) {
        valueQ += (int) ((maxValue - values[j]) * scale);
      } else {
        valueQ += (int) (maxValue * scale);
        height = -height;
      }
      int a=(int)(Math.random()*5+1);
      g.setColor(colors[a]);
      g.fillRect(valueP, valueQ, barWidth - 2, height);
      g.setColor(Color.black);
      g.drawRect(valueP, valueQ, barWidth - 2, height);
 
      
      int labelWidth = labelFontMetrics.stringWidth(names[j]);
      stringWidth = j * barWidth + (barWidth - labelWidth) / 2;
      g.drawString(names[j],stringWidth, stringHeight);
    }
  }

    }