DualYAxis


1   
2   /***********************************************************************************************
3    * File Info: $Id: DualYAxis.java,v 1.2 2003/08/28 01:18:02 nathaniel_auvil Exp $
4    * Copyright (C) 2002
5    * Author: Nathaniel G. Auvil
6    * Contributor(s):
7    *
8    * Copyright 2002 (C) Nathaniel G. Auvil. All Rights Reserved.
9    *
10   * Redistribution and use of this software and associated documentation ("Software"), with or
11   * without modification, are permitted provided that the following conditions are met:
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19   *
20   * 3. The name "jCharts" or "Nathaniel G. Auvil" must not be used to endorse or promote
21   *  products derived from this Software without prior written permission of Nathaniel G.
22   *  Auvil.  For written permission, please contact nathaniel_auvil@users.sourceforge.net
23   *
24   * 4. Products derived from this Software may not be called "jCharts" nor may "jCharts" appear
25   *  in their names without prior written permission of Nathaniel G. Auvil. jCharts is a
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40  
41  package org.krysalis.jcharts.demo.simpleservlet;
42  
43  
44  import org.krysalis.jcharts.axisChart.AxisChart;
45  import org.krysalis.jcharts.chartData.AxisChartDataSet;
46  import org.krysalis.jcharts.chartData.DataSeries;
47  import org.krysalis.jcharts.chartData.interfaces.IAxisDataSeries;
48  import org.krysalis.jcharts.encoders.ServletEncoderHelper;
49  import org.krysalis.jcharts.properties.AxisProperties;
50  import org.krysalis.jcharts.properties.ChartProperties;
51  import org.krysalis.jcharts.properties.ClusteredBarChartProperties;
52  import org.krysalis.jcharts.properties.DataAxisProperties;
53  import org.krysalis.jcharts.properties.LegendProperties;
54  import org.krysalis.jcharts.properties.LineChartProperties;
55  import org.krysalis.jcharts.properties.PointChartProperties;
56  import org.krysalis.jcharts.properties.util.ChartFont;
57  import org.krysalis.jcharts.types.ChartType;
58  
59  import javax.servlet.ServletException  ;
60  import javax.servlet.http.HttpServletRequest  ;
61  import javax.servlet.http.HttpServletResponse  ;
62  import java.awt.*;
63  import java.io.IOException  ;
64  
65  // Dual Y axis changes courtesy of St�phane NGUYEN integrated by CMC 25Aug03
66  // French translation courtesy of my good wife Jacki ...
67  public class DualYAxis extends ChartServlet {
68  
69  
70      //---all of the charts will have some properties.
71      private LineChartProperties lineChartProperties;
72      private ClusteredBarChartProperties clusteredBarChartProperties;
73  
74      protected LegendProperties legendProperties;
75      protected ChartProperties chartProperties;
76      protected AxisProperties axisProperties;
77  
78      //---all of the charts have the same size
79      protected int width = 750;
80      protected int height = 430;
81  
82  
83    public void init() {
84  
85  
86      //---------------------Font & Police----------------------------------------
87  
88      legendProperties = new LegendProperties();
89      chartProperties = new ChartProperties();
90      axisProperties = new AxisProperties(false);
91  
92      ChartFont axisScaleFont = new ChartFont(new Font("Arial Narrow", Font.PLAIN, 10), Color.black);
93      axisProperties.getXAxisProperties().setScaleChartFont(axisScaleFont);
94      axisProperties.getYAxisProperties().setScaleChartFont(axisScaleFont);
95  
96      ChartFont axisTitleFont = new ChartFont(new Font("Arial Narrow", Font.PLAIN, 13), Color.black);
97      axisProperties.getXAxisProperties().setTitleChartFont(axisTitleFont);
98      axisProperties.getYAxisProperties().setTitleChartFont(axisTitleFont);
99  
100     ChartFont titleFont = new ChartFont(new Font("Georgia Negreta cursiva", Font.PLAIN, 15), Color.black);
101     chartProperties.setTitleFont(titleFont);
102 
103     //On fixe la marge avec le cadre
104     // Set the margin within the frame
105     chartProperties.setEdgePadding(2f);
106 
107     //On met le graphe sur un fond gris clair
108     // Set the chart against a plain grey background
109     axisProperties.setBackgroundPaint(new Color (245, 245, 245)); 
110 
111     //Param�trage de la bo�te de l�gende
112     //Parameters for the legend box
113     //legendProperties.setPlacement(LegendAreaProperties.RIGHT);
114     //legendProperties.setNumColumns(1);
115     //legendProperties.setFont( new Font("Arial Narrow", Font.PLAIN, 13) );
116     //legendProperties.setFontPaint(Color.black);
117     ChartFont legendFont = new ChartFont(new Font("Arial Narrow", Font.PLAIN, 13), Color.black);
118     legendProperties.setChartFont(legendFont);
119     legendProperties.setChartPadding(10);
120 
121     //Arrondi � la puissance 10
122     //Round up to the power of 10
123     DataAxisProperties dataAxisProperties= (DataAxisProperties) axisProperties.getYAxisProperties();
124     dataAxisProperties.setRoundToNearest(1);
125 
126     //Parametrage du nombre de graduation sur l'axe des ordonn�es
127     //Set the number of ticks(?) for the ordinal axis
128     dataAxisProperties.setNumItems(6);
129 
130     //utilisation de la virgule s'il y a lieu (normalement non)
131     // Set the use of the comma if there are any (usually not)
132     dataAxisProperties.setUseCommas(false);
133 
134     //Ne pas afficher les bordures sup�rieur et droite du chart
135     // Don't attach upper borders and the right of the chart
136     axisProperties.getYAxisProperties().setShowEndBorder(false);
137     axisProperties.getXAxisProperties().setShowEndBorder(false);
138 
139 
140     Stroke[] strokes = {LineChartProperties.DEFAULT_LINE_STROKE};
141     //Shape[] shapes = {null};
142     Shape[] shapes= { PointChartProperties.SHAPE_TRIANGLE };
143     lineChartProperties = new LineChartProperties(strokes, shapes);
144 
145     clusteredBarChartProperties = new ClusteredBarChartProperties();
146 
147     //Param�trage de la largeur des barres de l'histogramme et non affichage des contours
148     //Set the width of the bars and don't show the outline
149     clusteredBarChartProperties.setWidthPercentage( 0.70f );
150     clusteredBarChartProperties.setShowOutlinesFlag( false );
151   }
152 
153     /**********************************************************************************************
154      *
155      **********************************************************************************************/
156   public void service( HttpServletRequest   req, HttpServletResponse   httpServletResponse ) throws ServletException  , IOException  
157   {
158     //---Some charts will need a second scale to render some values and then will
159     //---need to render an axis at the right of the charts with it
160     long secondScale=1;
161 
162     //---specific variable use to render negative value in all case
163     double maxDataClustAbs = 0;
164     double maxDataLineAbs = 0;
165     int numberOfNegativ=0;
166     int numberOfZero=0;
167 
168     try {
169 
170       String  [] xAxisLabels = {"MAR", "APR", "MAY", "JUN", "JUL", "AUG", "SEP", "OCT", "NOV", "DEC", "JAN", "FEB"};
171       
172 
173       double[][] dataClust = new double[][]{
174         {3533, 101265, 76076, 86664, 135567, 87729, 85309, 143423, 18732, 111842, 39534, 11980}
175       , {0, 103400, 65000, 88500, 143000, 80000, 88500, 143500, 99000, 118500, 38500, 18000}
176                                     };
177       double[][] dataLine = new double[][]{
178         {21, 4, 1, 2, 3, 2, 3, 2, 93, 18, 54, 0}
179                                       };          
180 
181       String   title = "Chart Title";
182       String   legendLabel1 = "Legend Label 1";
183       String   legendLabel2 = "Legend Label 2";
184       String   legendLabel3 = "Legend Label 3";
185 
186       //IAxisDataSeries dataSeries = new DataSeries( xAxisLabels, null, null, title );
187       IAxisDataSeries dataSeries = new DataSeries( xAxisLabels, "X Axis title", "Left Y Axis title", title );
188 
189       String  [] legendLabelsClust = {legendLabel1, legendLabel2};
190       Paint[] clustPaints = new Paint[]{Color.pink, Color.blue};
191 
192       String  [] legendLabelsLine = {legendLabel3};
193       Paint[] linePaints = new Paint[]{Color.green};
194 
195       //------------On r�cup�re une 2�me �chelle "secondScale"------------------
196       //------------et on fait un traitement pour les nombres n�gatifs----------
197       //------------We get back the 2nd scale "secondScale"---------------------
198       //-------------and we handle the negative numbers---------------------
199      //On identifie la valeur maximum absolue des data Clustered Bar
200       //et on compte le nombre de z�ro et le nombre de chiffres n�gatifs
201       // We identify the absolute maximum value of the data in the Clustered Bar
202       // and we count the number of zero and negative digits
203       for (int k=0; k<2; k++) {
204 
205         for (int j=0; j<xAxisLabels.length; j++) {
206           if (maxDataClustAbs < (Math.abs(dataClust[k][j])) && (dataClust[k][j]!=0) ) {
207             maxDataClustAbs=(Math.abs(dataClust[k][j]));
208           }
209           if (dataClust[k][j]<0) {
210             numberOfNegativ+=1;
211           }
212           if (dataClust[k][j]==0) {
213             numberOfZero+=1;  
214           }
215         }
216       }
217 
218       //On identifie la valeur maximum absolue des data Line
219       //et on compte le nombre de z�ro et le nombre de chiffres n�gatifs
220       // We identify the absolute maximum value of the data lines
221       // and we count the number of zero and negative digits
222       for (int j=0; j<xAxisLabels.length; j++) {
223         if (maxDataLineAbs < (Math.abs(dataLine[0][j])) && (dataLine[0][j]!=0) ) {
224           maxDataLineAbs=(Math.abs(dataLine[0][j]));
225         }
226         if (dataLine[0][j]<0) {
227             numberOfNegativ+=1;
228         }
229         if (dataLine[0][j]==0) {
230             numberOfZero+=1;  
231         }
232       }
233 
234       //On d�finit la valeur de la seconde �chelle si les ordres de grandeurs
235       //sont tr�s diff�rent (de l'ordre de 10).
236       //We define the value of the second scale if the increment is an order of
237       //magnitude greater
238       if (maxDataClustAbs>10*maxDataLineAbs) {    
239         axisProperties.getYAxisProperties().setShowRightAxis(true);
240         secondScale=Math.round(maxDataClustAbs/(maxDataLineAbs));
241         axisProperties.getYAxisProperties().setSecondScaleRight((float) (secondScale) );
242         ChartFont axisScaleFontRight = new ChartFont( new Font("Arial Narrow", Font.PLAIN, 10), Color.green.darker() );
243         axisProperties.getYAxisProperties().setScaleChartFontRight( axisScaleFontRight );
244       }
245 
246       //On v�rifie s'il y a des valeurs n�gatives
247       // Check if there are negative numbers
248       if (numberOfNegativ>0) {
249         if ((maxDataLineAbs*secondScale)>maxDataClustAbs) {
250           axisProperties.getYAxisProperties().setMinRightAxis((double) (-maxDataLineAbs*secondScale));
251           //Si les valeurs ne sont pas toutes n�gatives on affiche l'axe des ordonn�es
252           //de mani�re a ce que le z�ro soit centr�
253           // If the numbers are not all negative we center the ordinal axis around zero
254           if (numberOfNegativ!=(3*xAxisLabels.length-numberOfZero)) {
255             axisProperties.getYAxisProperties().setMaxRightAxis((double) (maxDataLineAbs*secondScale));
256           }
257         } else {
258           axisProperties.getYAxisProperties().setMinRightAxis((double) (-maxDataClustAbs));
259             if (numberOfNegativ!=(3*xAxisLabels.length-numberOfZero)) {
260               axisProperties.getYAxisProperties().setMaxRightAxis((double) (maxDataClustAbs));
261             }
262         }
263       }
264 
265       dataSeries.addIAxisPlotDataSet( new AxisChartDataSet( dataClust, legendLabelsClust, clustPaints, ChartType.BAR_CLUSTERED, clusteredBarChartProperties ) );
266       dataSeries.addIAxisPlotDataSet( new AxisChartDataSet( dataLine, legendLabelsLine, linePaints, ChartType.LINE, lineChartProperties ) );
267       AxisChart axisChart = new AxisChart( dataSeries, chartProperties, axisProperties, legendProperties, width, height );
268  
269       ServletEncoderHelper.encodeJPEG13( axisChart, 1.0f, httpServletResponse );
270     }
271     catch( Throwable   throwable ) {
272       //HACK do your error handling here...
273       throwable.printStackTrace();
274     }
275   }
276 
277 }
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