/**
* Copyright 2011 Marco Berri - marcoberri@gmail.com
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*
*/
package it.marcoberri.mbmeteo.action.chart;
import it.marcoberri.mbmeteo.model.Meteolog;
import it.marcoberri.mbmeteo.utils.Default;
import java.awt.Color;
import java.awt.Font;
import java.awt.GradientPaint;
import java.awt.Point;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.HashMap;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.dial.DialBackground;
import org.jfree.chart.plot.dial.DialPlot;
import org.jfree.chart.plot.dial.DialPointer;
import org.jfree.chart.plot.dial.StandardDialScale;
import org.jfree.data.general.DefaultValueDataset;
import org.jfree.ui.GradientPaintTransformType;
import org.jfree.ui.RectangleInsets;
import org.jfree.ui.StandardGradientPaintTransformer;
/**
*
* @author Marco Berri <marcoberri@gmail.com>
*/
public class GetLastUDial extends Base {
/**
* Processes requests for both HTTP
* <code>GET</code> and
* <code>POST</code> methods.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
log.debug("start : " + this.getClass().getName());
final HashMap<String, String> params = getParams(request.getParameterMap());
final Integer dimy = Default.toInteger(params.get("dimy"), 600);
final Integer dimx = Default.toInteger(params.get("dimx"), 800);
Meteolog meteolog = ds.find(Meteolog.class).order("-time").limit(1).get();
DefaultValueDataset dataset = new DefaultValueDataset(meteolog.getOutdoorHumidity());
// get data for diagrams
DialPlot plot = new DialPlot();
plot.setInsets(RectangleInsets.ZERO_INSETS);
//plot.setView(0.1, 0.1, 0.9, 0.9);
// plot.set
plot.setDataset(0, dataset);
GradientPaint gp = new GradientPaint(new Point(),
new Color(255, 255, 255), new Point(),
new Color(170, 170, 220));
DialBackground db = new DialBackground(gp);
db.setGradientPaintTransformer(new StandardGradientPaintTransformer(
GradientPaintTransformType.CENTER_HORIZONTAL));
plot.setBackground(db);
StandardDialScale scale = new StandardDialScale();
scale.setLowerBound(0);
scale.setUpperBound(100);
scale.setTickLabelOffset(0.14);
scale.setTickLabelFont(new Font("Dialog", Font.PLAIN, 10));
plot.addScale(0, scale);
plot.setInsets( RectangleInsets.ZERO_INSETS);
DialPointer needle = new DialPointer.Pointer(0);
plot.addLayer(needle);
JFreeChart chart1 = new JFreeChart(plot);
chart1.setTitle("Humidity %");
final File f = File.createTempFile("mbmeteo", ".jpg");
ChartUtilities.saveChartAsJPEG(f, chart1, dimx, dimy);
response.setContentType("image/jpeg");
response.setHeader("Content-Length", "" + f.length());
response.setHeader("Content-Disposition", "inline; filename=\"" + f.getName() + "\"");
final OutputStream out = response.getOutputStream();
final FileInputStream in = new FileInputStream(f.toString());
final int size = in.available();
final byte[] content = new byte[size];
in.read(content);
out.write(content);
in.close();
out.close();
}
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
/**
* Handles the HTTP
* <code>GET</code> method.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Handles the HTTP
* <code>POST</code> method.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
}