charts API help

By: soujiro_as - soujiro_as
charts API help
2005-12-06 10:58
Hi, I try to instantiate a JRBasePiePlot but this needs an interface (JChartPlot) as parameter, later, I instantiate a JFreeChart but I can´t cast this for use in my JasperDesign object.

How can I implements charts with the JasperReports API?.

P.D. Sorry by my poor English.




By: Lucian Chirita - lucianc
RE: charts API help
2005-12-07 01:47
Hi

If you want to create a pie chart via API, you should do
JRDesignChart pieChart = new JRDesignChart(jasperDesign, JRChart.CHART_TYPE_PIE);
JRDesignPiePlot piePlot = (JRDesignPiePlot) pieChart.getPlot();
piePlot.set...

HTH,
Lucian




By: Bill Babcock - billbabcock
RE: charts API help
2006-02-01 07:55
When I look at the API for the JRDesignChart() method, it doesn't take a JasperDesign obj as a param.

I'm also needing to create charts via the API, and with only the noxml example, and the various java files spread out thru the demos as the only info (yes, I bought the Ultimate guide - but it doesn't talk about the API usage at all), it would be a great help to get a pointer at some working code that showed this start to finish.




By: soujiro_as - soujiro_as
RE: charts API help
2006-03-09 10:50
Yes, I agree with billbabcock, a complete example of a chart implemented through the chart API would be a good help.




By: Bill Babcock - billbabcock
RE: charts API help
2006-02-01 11:04
hrmmm...amazing what upgrading to the current release will do...ok - so the params are ok.

Any examples? :-)




By: soujiro_as - soujiro_as
RE: charts API help
2006-03-21 13:52
Here are my TimeSeries chart example:

private JRDesignChart createTimeSeriesReport(JasperDesign jasperDesign){
String dateIntType=ReportGeneratorConstants.FIELD_TYPE_DATEINT;
String dateExpression="String.valueOf(new com.jatun.titus.reportgenerator.reportfieldformatter.Formatter().format(String.valueOf($F{dateStart}),\""+dateIntType+"\",\"dd/MM/yy\",\"en\", TimeZone.getDefault().getID()))";
JRDesignChart timeSeriesChart = new JRDesignChart(jasperDesign, JRChart.CHART_TYPE_TIMESERIES);

JRDesignTimeSeriesDataset timeSeriesDataset= (JRDesignTimeSeriesDataset) timeSeriesChart.getDataset();
timeSeriesDataset.setTimePeriod(Year.class);

timeSeriesDataset.setIncrementType(JRVariable.RESET_TYPE_GROUP);
timeSeriesDataset.setIncrementGroup((JRGroup)jasperDesign.getGroupsMap().get("contactTypeGroup"));

JRDesignTimeSeries timeSeries=new JRDesignTimeSeries();
JRDesignExpression seriesExpression=new JRDesignExpression();
seriesExpression.setValueClassName("java.lang.String");
seriesExpression.setText("new String(\"contactType\")");
timeSeries.setSeriesExpression(seriesExpression);

JRDesignExpression timePeriodExpression=new JRDesignExpression();
timePeriodExpression.setValueClassName("java.util.Date");
timePeriodExpression.setText("new java.util.Date("+dateExpression+")");
timeSeries.setTimePeriodExpression(timePeriodExpression);

JRDesignExpression valueExpression=new JRDesignExpression();
valueExpression.setValueClassName("java.lang.Integer");
valueExpression.setText("$V{contactTypeGroup_COUNT}");
timeSeries.setValueExpression(valueExpression);

timeSeriesDataset.addTimeSeries(timeSeries);

timeSeriesChart.setDataset(timeSeriesDataset);
return(timeSeriesChart);
}

This code get's a Exception, because the "timeSeriesChart.getDataset()" returns null, then I give a look to the source code and found something interesting in the JRDesignChart class:
........
case CHART_TYPE_TIMESERIES:
//FIXME CHARTS why only one dataset?
//dataset = new JRDesignTimeSeriesDataset( dataset );
plot = new JRDesignTimeSeriesPlot( plot );
break;
......
case CHART_TYPE_XYBAR:
plot = new JRDesignBarPlot(plot);
break;

In the first case sentence, the creation of the dataset was commented, and in the second, the creation of the dataset don´t exists. I'm usign JasperReports 1.1.0. To fix this, I uncommented the line in the first case sentence, and in the second, I put the line "dataset = new JRDesignXyDataset(dataset);", this is o.k.? or I'm wrong. I generate the jar using ant, and the TimeSeries chart was finally generated.




By: soujiro_as - soujiro_as
RE: charts API help
2006-03-21 12:18
I have implemented an example of a some charts, i.e. for a pie chart:

private JRDesignChart createPieChart(JasperDesign jasperDesign){
JRDesignChart designChart=new JRDesignChart(jasperDesign,JRChart.CHART_TYPE_PIE);

JRDesignPieDataset pieDataset=(JRDesignPieDataset) designChart.getDataset();
pieDataset.setIncrementType(JRVariable.RESET_TYPE_GROUP);
pieDataset.setIncrementGroup((JRGroup)jasperDesign.getGroupsMap().get("contactTypeGroup"));
JRDesignExpression keyExpression=new JRDesignExpression();
keyExpression.setValueClassName("java.lang.Integer");
keyExpression.setText("$F{contactType}");
pieDataset.setKeyExpression(keyExpression);

JRDesignExpression valueExpression=new JRDesignExpression();
valueExpression.setValueClassName("java.lang.Integer");
valueExpression.setText("$V{contactTypeGroup_COUNT}");
pieDataset.setValueExpression(valueExpression);
designChart.setDataset(pieDataset);
return(designChart);
}

This work similarly for tyhe other types of charts, only the dataset changes, but for a XYBar or a TimeSeries chart, the "designChart.getDataset()" function returns null.

How I have to get the dataset for a XYBar and a TimeSeries chart?




By: jokrasa - jokrasa
RE: charts API help
2006-06-16 08:13
Trying to figure out how to use this code(below):

The question is how do I pass/feed the actual HashMap (or values) into the dataset.

Can't find this anywhere!

Where does the return value (designChart) go?

private JRDesignChart createPieChart(JasperDesign jasperDesign){
JRDesignChart designChart=new JRDesignChart(jasperDesign,JRChart.CHART_TYPE_PIE);

JRDesignPieDataset pieDataset=(JRDesignPieDataset) designChart.getDataset();
pieDataset.setIncrementType(JRVariable.RESET_TYPE_GROUP);
pieDataset.setIncrementGroup((JRGroup)jasperDesign.getGroupsMap().get("contactTypeGroup"));
JRDesignExpression keyExpression=new JRDesignExpression();
keyExpression.setValueClassName("java.lang.Integer");
keyExpression.setText("$F{contactType}");
pieDataset.setKeyExpression(keyExpression);

JRDesignExpression valueExpression=new JRDesignExpression();
valueExpression.setValueClassName("java.lang.Integer");
valueExpression.setText("$V{contactTypeGroup_COUNT}");
pieDataset.setValueExpression(valueExpression);
designChart.setDataset(pieDataset);
return(designChart);
}

any help greatly appreciated!