Name: mc57594 Date: 08/12/99


The application program:
-----------------------


import javax.swing.*;
import javax.swing.table.*;
import java.awt.print.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.awt.Dimension;

public class Report implements Printable
{
  JFrame frame;
  JTable tableView;

  public Report() {
    frame = new JFrame("Sales Report");
    frame.addWindowListener(new WindowAdapter() {
     public void windowClosing(WindowEvent e) {System.exit(0);}});

    final String[] headers = {"Index", "Icon", "Description", "Open Price",
        "Latest Price", "End Date", "Quantity"};
    final Object[][] data = new Object[200][7];

ImageIcon image = new ImageIcon("ok.gif");

int i;
for (i = 0; i < 200; ++i)
{
data[i][0] = new Integer(i);
data[i][1] = image;
data[i][2] = new String ("Blue Biro");
data[i][3] = new String ("0.10");
data[i][4] = new String ("0.123456789");
data[i][5] = new Date();
data[i][6] = new Boolean(true);
}

    TableModel dataModel = new AbstractTableModel() {
        public int getColumnCount() { return headers.length; }
        public int getRowCount() { return data.length;}
        public Object getValueAt(int row, int col) {
                return data[row][col];}
        public String getColumnName(int column) {
                return headers[column];}
        public Class getColumnClass(int col) {
                return getValueAt(0,col).getClass();}
        public boolean isCellEditable(int row, int col) {
                return (col==1);}
        public void setValueAt(Object aValue, int row, int column) {
                data[row][column] = aValue;
       }
     };

     tableView = new JTable(dataModel);
     JScrollPane scrollpane = new JScrollPane(tableView);

     scrollpane.setPreferredSize(new Dimension(500, 80));
     frame.getContentPane().setLayout(new BorderLayout());
     frame.getContentPane().add(BorderLayout.CENTER,scrollpane);
     frame.pack();
     JButton printButton= new JButton();

     printButton.setText("print me!");

     frame.getContentPane().add(BorderLayout.SOUTH,printButton);

     // for faster printing turn double buffering off
     //RepaintManager.currentManager(frame).setDoubleBufferingEnabled(false);

     printButton.addActionListener(
new ActionListener() {
          public void actionPerformed(ActionEvent evt) {

new Thread () {
public void run () {
                PrinterJob pj=PrinterJob.getPrinterJob();
                pj.setPrintable(Report.this);
          
                if (pj.printDialog()) {
try { pj.print(); } // ??? in the current thread
catch (Exception printEx) { printEx.printStackTrace (); }
                }
}
}.start();
}
        });

        frame.setVisible(true);
     }

     public int print(Graphics g,
PageFormat pageFormat,
                     int pageIndex) throws PrinterException {
        Graphics2D g2 = (Graphics2D) g;
        g2.setColor(Color.black);
        int fontHeight=g2.getFontMetrics().getHeight();
        int fontDescent=g2.getFontMetrics().getDescent();

        //leave room for page number
        double pageHeight = pageFormat.getImageableHeight()-fontHeight;
        double pageWidth = pageFormat.getImageableWidth();
        double tableWidth = (double)
                tableView.getColumnModel().getTotalColumnWidth();
        double scale = 1;
        if (tableWidth >= pageWidth) {
                scale = pageWidth / tableWidth;
        }

        double headerHeightOnPage =
tableView.getTableHeader().getHeight()*scale;
        double tableWidthOnPage=tableWidth*scale;

        double oneRowHeight=(tableView.getRowHeight()+
     tableView.getRowMargin())*scale;
        int numRowsOnAPage =
(int)((pageHeight-headerHeightOnPage)/oneRowHeight);
        double pageHeightForTable=oneRowHeight*numRowsOnAPage;
        int totalNumPages = (int)Math.ceil((
     (double)tableView.getRowCount())/numRowsOnAPage);
        if(pageIndex>=totalNumPages) {
     return NO_SUCH_PAGE;
        }

        g2.translate(pageFormat.getImageableX(),
                     pageFormat.getImageableY());
//bottom center
        g2.drawString("Page: "+(pageIndex+1),(int)pageWidth/2-35,
     (int)(pageHeight+fontHeight-fontDescent));

        g2.translate(0f,headerHeightOnPage);
        g2.translate(0f,-pageIndex*pageHeightForTable);

        //If this piece of the table is smaller than the size available,
        //clip to the appropriate bounds.
        if (pageIndex + 1 == totalNumPages) {
           int lastRowPrinted = numRowsOnAPage * pageIndex;
           int numRowsLeft = tableView.getRowCount() - lastRowPrinted;
           g2.setClip(0, (int)(pageHeightForTable * pageIndex),
             (int) Math.ceil(tableWidthOnPage),
             (int) Math.ceil(oneRowHeight * numRowsLeft));
        }
        //else clip to the entire area available.
        else{
             g2.setClip(0, (int)(pageHeightForTable*pageIndex),
             (int) Math.ceil(tableWidthOnPage),
             (int) Math.ceil(pageHeightForTable));
        }

      // for faster printing turn double buffering off
      RepaintManager.currentManager(frame).setDoubleBufferingEnabled(false);

        g2.scale(scale,scale);
        tableView.paint(g2);
        g2.scale(1/scale,1/scale);
        g2.translate(0f,pageIndex*pageHeightForTable);
        g2.translate(0f, -headerHeightOnPage);
        g2.setClip(0, 0,(int) Math.ceil(tableWidthOnPage),
          (int)Math.ceil(headerHeightOnPage));
        g2.scale(scale,scale);
        tableView.getTableHeader().paint(g2);//paint header at top

      // return double buffering on
      RepaintManager.currentManager(frame).setDoubleBufferingEnabled(true);

        return Printable.PAGE_EXISTS;
   }

   public static void main(String[] args) {
        new Report();
   }
}


The exception:
-------------
java.lang.IllegalArgumentException: Zero length string passed to TextLayout constructor.
        at java.lang.Throwable.fillInStackTrace(Native Method)
        at java.lang.Throwable.fillInStackTrace(Compiled Code)
        at java.lang.Throwable.<init>(Compiled Code)
        at java.lang.Exception.<init>(Compiled Code)
        at java.lang.RuntimeException.<init>(RuntimeException.java:47)
        at java.lang.IllegalArgumentException.<init>(IllegalArgumentException.java:43)
        at java.awt.font.TextLayout.<init>(TextLayout.java:337)
        at sun.java2d.PeekGraphics.drawString(PeekGraphics.java:845)
        at javax.swing.plaf.basic.BasicGraphicsUtils.drawString(Compiled Code)
        at javax.swing.plaf.basic.BasicLabelUI.paintEnabledText(Compiled Code)
        at javax.swing.plaf.basic.BasicLabelUI.paint(Compiled Code)
        at javax.swing.plaf.ComponentUI.update(Compiled Code)
        at javax.swing.JComponent.paintComponent(Compiled Code)
        at javax.swing.JComponent.paint(Compiled Code)
        at javax.swing.CellRendererPane.paintComponent(Compiled Code)
        at javax.swing.plaf.basic.BasicTableUI.paintCell(Compiled Code)
        at javax.swing.plaf.basic.BasicTableUI.paintRow(Compiled Code)
        at javax.swing.plaf.basic.BasicTableUI.paint(Compiled Code)
        at javax.swing.plaf.ComponentUI.update(Compiled Code)
        at javax.swing.JComponent.paintComponent(Compiled Code)
        at javax.swing.JComponent.paint(Compiled Code)
        at Report.print(Report.java:183)
        at sun.java2d.RasterPrinterJob.printPage(Compiled Code)
        at sun.java2d.RasterPrinterJob.print(Compiled Code)
        at Report$4.run(Report.java:110)
(Review ID: 93772)
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