DynamicReports: How to set the height/width/dimension of a sub-report?

Lets say that you have a subreport which displays a message. The length of the message can be from 0 to 20 lines. Following this message subreport, you have another subreport which displays some data and you would like it to be always displayed at the bottom one third of the page regardless the length of the message.

One way to make the second data subreport to be always displayed at a certain height of the page is to set the height of the first message subreport above it. The way to do it is to put the subreport in a vertical list or a horizontal list and set the height/width/dimension of that vertical list or horizontal list.


import java.util.ArrayList;
import java.util.List;
import net.sf.dynamicreports.jasper.builder.JasperReportBuilder;
import net.sf.dynamicreports.report.builder.DynamicReports;
import static net.sf.dynamicreports.report.builder.DynamicReports.cmp;
import static net.sf.dynamicreports.report.builder.DynamicReports.col;
import static net.sf.dynamicreports.report.builder.DynamicReports.exp;
import static net.sf.dynamicreports.report.builder.DynamicReports.stl;
import net.sf.dynamicreports.report.builder.component.SubreportBuilder;
import net.sf.dynamicreports.report.builder.datatype.DataTypes;
import net.sf.dynamicreports.report.exception.DRException;
import net.sf.jasperreports.engine.JRDataSource;
import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource;

public class ReportDimensionDemo {
    public static void main(String[] args){
        new ReportDimensionDemo();
    }
 
    public ReportDimensionDemo() {
        JasperReportBuilder report = DynamicReports.report();
        report.setDataSource(createDataSource());
     
        SubreportBuilder messageSubreport = cmp.subreport(buildMessageSubreport())
                .setDataSource(exp.subDatasourceBeanCollection("messageData"));
        SubreportBuilder dataSubreport = cmp.subreport(buildDataSubreport())
                .setDataSource(exp.subDatasourceBeanCollection("dataData"));
     
        report.detail(cmp.verticalList(messageSubreport).setFixedHeight(300),
               // .setFixedWidth(200)
                //.setFixedDimension(200, 300)
                dataSubreport );
        try {
            report.show(false);
        }catch(DRException de){
            de.printStackTrace(System.out);
        }
    }
 
    private JasperReportBuilder buildMessageSubreport() {
        JasperReportBuilder report = DynamicReports.report();
        report.columns(col.column("message", DataTypes.stringType()));
     
        return report;
    }
 
    private JasperReportBuilder buildDataSubreport() {
        JasperReportBuilder report = DynamicReports.report();
        report.columns(col.column("Name", "name", DataTypes.stringType())
                    .setStyle(stl.style(stl.pen1Point())),
                col.column("Price", "price", DataTypes.doubleType())
                        .setStyle(stl.style(stl.pen1Point()))
                        .setPattern("$##0.00"));
     
        return report;
    }
 
    private JRDataSource createDataSource() {
        List<ReportData> dataSource = new ArrayList<ReportData>();
        ReportData reportData = new ReportData();
        List<MessageData> messageList = new ArrayList<MessageData>();
        MessageData messageData = new MessageData();
        List<DataData> dataList = new ArrayList<DataData>();
        DataData dataData = new DataData();
     
        messageData.setMessage("The most useful report in the universe.");
        messageList.add(messageData);
        reportData.setMessageData(messageList);
     
        dataData.setName("Apple");
        dataData.setPrice(1.68);
        dataList.add(dataData);
        dataData = new DataData();
        dataData.setName("Papaya");
        dataData.setPrice(3.14);
        dataList.add(dataData);
        reportData.setDataData(dataList);
     
        dataSource.add(reportData);
        return new JRBeanCollectionDataSource(dataSource);
    }
 
    public class ReportData {
        private List<MessageData> messageData;
        private List<DataData> dataData;
     
        public List<MessageData> getMessageData() {return messageData;}
        public void setMessageData(List<MessageData> m) {messageData=m;}
        public List<DataData> getDataData() {return dataData;}
        public void setDataData(List<DataData> d) {dataData=d;}
    }
 
    public class MessageData{
        private String message;
     
        public String getMessage() {return message;}
        public void setMessage(String m) {message=m;}
    }
 
    public class DataData {
        private String name;
        private Double price;
     
        public String getName() {return name;}
        public void setName(String n) {name=n;}
        public Double getPrice() {return price;}
        public void setPrice(Double p) {price=p;}
    }
}
   
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