Bearbeiten von „JTable Druckfunktion anpassen“

Dieses Beispiel zeigt, wie wir die JTable Print Funktion anpassen können.
Das Beispiel druckt eine Überschrift mit zwei Zeilen und einem Rand.
Siehe auch :
http://java.sun.com/docs/books/tutorial/uiswing/misc/printtable.html

<code=java>/*
 * TableReportDemo.java
 * This demo shows you how to customize the JTable print function.
 * As an example, we print a report header with two rows and a border.
 */
import java.awt.*;
import java.awt.event.*;
import java.awt.print.*;
import java.util.logging.*;
import javax.print.attribute.*;
import javax.swing.*;
import javax.swing.JTable.*;
import javax.swing.table.*;
public class TableReportDemo extends JFrame {
    private JTable table;
    private JButton btPrint;
    private Action printAction = new AbstractAction("Print...") {
        public void actionPerformed(final ActionEvent e) {
            try {
                printJTable();
            } catch (PrinterException ex) {
                Logger.getLogger(TableReportDemo.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
    };
    public TableReportDemo() {
        super("TableReportDemo");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        btPrint = new JButton();
        add(btPrint, BorderLayout.SOUTH);
        btPrint.setAction(printAction);
        add(new JScrollPane(createTable()), BorderLayout.CENTER);
        pack();
    }
    public JTable createTable() {
        String[] title = new String[]{"Title A", "Title B", "Title C", "Title D", "Title E"};
        String[][] data = new String[][]{};
        DefaultTableModel model = new DefaultTableModel(data, title);
        table = new JTable(model);
        table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
        for (int i = 0; i < 50; i++) {
            model.addRow(new String[]{String.valueOf(i), "", "", ""});
        }
        return table;
    }

    private void printJTable() throws PrinterException {
        // possibly prepare the table for printing here first
        // wrap in a try/finally so table can be restored even if something fails
        try {
            // fetch the printable
            Printable printable = new TableReport(table);
            PrinterJob job = PrinterJob.getPrinterJob();// fetch a PrinterJob
            job.setPrintable(printable);// set the Printable on the PrinterJob
            // create an attribute set to store attributes from the print dialog
            PrintRequestAttributeSet attr = new HashPrintRequestAttributeSet();
            // display a print dialog and record whether or not the user cancels it
            boolean printAccepted = job.printDialog(attr);
            if (printAccepted) {// if the user didn't cancel the dialog
                job.print(attr);// do the printing
            }
        } finally {
            // possibly restore the original table state here
        }
    }
    public static void main(final String[] args) {
        Runnable gui = new Runnable() {

            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (Exception ex) {
                    ex.printStackTrace();
                }
                new TableReportDemo().setVisible(true);
            }
        };
        //GUI must start on EventDispatchThread:
        SwingUtilities.invokeLater(gui);
    }
}
class TableReport implements Printable {
    private Printable tablePrintable;
    private PageFormat pageFormatJTable;
    public TableReport(final JTable table) {
        tablePrintable = table.getPrintable(JTable.PrintMode.FIT_WIDTH, null, null);
    }
    public int print(final Graphics graphics, final PageFormat pageFormat,
            final int pageIndex) throws PrinterException {
        Graphics2D g = (Graphics2D) graphics;
        int x1 = (int) pageFormat.getImageableX();
        int y1 = (int) pageFormat.getImageableY();
        int w1 = (int) pageFormat.getImageableWidth();
        int h1 = (int) pageFormat.getImageableHeight();
        if (pageFormatJTable == null) {
            pageFormatJTable = (PageFormat) pageFormat.clone();
            Paper paperJTable = pageFormatJTable.getPaper();
            if(pageFormatJTable.getOrientation() == PageFormat.PORTRAIT){
                paperJTable.setImageableArea(x1, y1 + 60,//skip header area
                        w1, h1 - 90);//reserve space for header and footer
            }else{
                paperJTable.setImageableArea(y1 + 60, x1,//skip header area
                        h1 - 90, w1);//reserve space for header and footer
            }
            pageFormatJTable.setPaper(paperJTable);
        }
        String title = "Title";
        String subtitle = "Subtitle";
        Font f = g.getFont();
        g.setFont(g.getFont().deriveFont(15f));
        FontMetrics fm = g.getFontMetrics();
        g.drawString(title, x1 + (w1-fm.stringWidth(title))/2, y1 + 15);
        g.setFont(f);
        fm = g.getFontMetrics();
        g.drawString(subtitle, x1 + (w1-fm.stringWidth(subtitle))/2, y1 + 30);
        g.drawRect(x1, y1, w1, 40);
        String footer = "Page " + (pageIndex + 1);
        g.drawString(footer, x1 + (w1-fm.stringWidth(footer))/2, y1 + h1 - 10);
        //print the table:
        Graphics gCopy = g.create();
        int retVal = tablePrintable.print(gCopy, pageFormatJTable, pageIndex);
        gCopy.dispose();
        //
        return retVal;
    }
}</code=java>
[[Kategorie:Java]]
[[Kategorie:Tutorials (Java)]]
[[Kategorie:Swing]]
[[Kategorie:Java-Codeschnipsel]]