changing the width of bars

[Muneer]

package com.jrefinery.chart.demo;

import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.awt.image.*;
import java.io.*;
import java.util.*;
import javax.swing.*;


import javax.servlet.*;
import javax.servlet.http.*;

import com.sun.image.codec.jpeg.*;

import com.jrefinery.chart.*;
import com.jrefinery.chart.data.*;
import com.jrefinery.chart.ui.*;
import com.jrefinery.data.*;
import com.jrefinery.ui.*;

/**
* A servlet demonstration, contributed by Wolfgang Irler.
*/
public class JDemo extends HttpServlet {


/**
* Creates and returns a category dataset for the demo charts.
*/
public CategoryDataset createCategoryDataset() {


Number[][] data = new Integer[][] {

{ new Integer(10), new Integer(4), new Integer(35), new Integer(14), new Integer(20) }

};

return new DefaultCategoryDataset(data);

}

/**
* Creates and returns a sample high-low dataset for the demo. Added by Andrzej Porebski.
*/



protected JFreeChart createChart(int type, int initGradColor, int finalGradColor) {

CategoryDataset categoryData = createCategoryDataset();
JFreeChart chart = ChartFactory.createVerticalBarChart("Vertical Bar Chart",
"Categories",
"Values",
categoryData, true);


return chart;
}


ServletContext context = null;

/**
* Override init() to set up data used by invocations of this servlet.
*/
public void init(ServletConfig config) throws ServletException {
super.init(config);

// save servlet context
context = config.getServletContext();
}

/**
* Basic servlet method, answers requests fromt the browser.
* @param request HTTPServletRequest
* @param response HTTPServletResponse
*/
public void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {

response.setContentType("image/jpeg");
int type = 1;
try {
type = Integer.parseInt( request.getParameter( "type" ) );
}
catch (Exception e) {
}

int initGradColor= 0;
int finalGradColor= 0;
try {
initGradColor = Integer.parseInt( request.getParameter( "initGradColor" ) );
finalGradColor = Integer.parseInt( request.getParameter( "finalGradColor" ) );
}
catch (Exception e) {
}

JFreeChart chart = createChart( type, initGradColor, finalGradColor );

int width = 800;
int height = 500;
try {
width = Integer.parseInt( request.getParameter( "width" ) );
height = Integer.parseInt( request.getParameter( "height" ) );
}
catch (Exception e) {
}

//BufferedImage img = draw( chart, width, height );
OutputStream out = response.getOutputStream();
ChartUtilities.writeChartAsJPEG(out, chart, width, height);
out.close();
}

}

Above was the code of a program i was running, I am getting bars with big width,I want to shorten the width, Can anybody tell me how to make the width short as well how to change the labels,

Thanks,
Muneer

[David Gilbert]

Hi Muneer,

The bar widths are set automatically to use up the space remaining after deducting:

- the 'intro gap', which is the space to the left of the first bar;
- the 'trail gap', which is the space to the right of the last bar;
- the 'series gap', which is the space between series;
- the 'category gap', which is the space between categories;

There's methods in CategoryPlot for changing the default settings for all these attributes.

Regards,

DG.