Java 仅打印 Swing 中的特定部分

Question

我想打印 Java GUI swing 中的某个部分。所以基本上我有一个框架，然后是其他 View ，如文本字段、标签、表格，然后是面板。面板内部有两个按钮。我想在打印时排除包含两个按钮的面板。我怎样才能做到这一点？到目前为止，这是我完成的代码:

  setTitle("VMS Sales Invoice");
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setBounds(100, 100, 397, 628);
    getContentPane().setLayout(null);

  JLabel lblVatable = new JLabel("VATable");
    lblVatable.setFont(new Font("SansSerif", Font.BOLD, 12));
    lblVatable.setBounds(158, 468, 55, 16);
    getContentPane().add(lblVatable);

    txtTotalDiscount = new JTextField();
    txtTotalDiscount.setFont(new Font("SansSerif", Font.BOLD, 12));
    txtTotalDiscount.setEditable(false);
    txtTotalDiscount.setBounds(256, 485, 122, 28);
    getContentPane().add(txtTotalDiscount);
    txtTotalDiscount.setColumns(10);

    JLabel lblTotalDiscount = new JLabel("Total Discount");
    lblTotalDiscount.setFont(new Font("SansSerif", Font.BOLD, 12));
    lblTotalDiscount.setBounds(158, 496, 86, 16);
    getContentPane().add(lblTotalDiscount);

  setResizable(false);
    setLocationRelativeTo(null); // THIS WILL CENTRE THE POSITION OF WINDOW
    setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);


  public class btnPrintAction implements ActionListener, Printable{
    public int print(Graphics gx, PageFormat pf, int page) throws PrinterException {

        if (page > 0){
            return NO_SUCH_PAGE;
        } // Only one page
        Graphics2D g = (Graphics2D)gx; // Cast to Graphics2D object
        g.translate(pf.getImageableX(), pf.getImageableY()); // Match origins to imageable area
        //g.drawString ("Hello world", 100, 100); // Print Hello World at offset (100, 100)

        Graphics2D g2d = (Graphics2D)g;
        g2d.translate(pf.getImageableX(), pf.getImageableY());

        // Print the entire visible contents of a
        // java.awt.Frame.
        getContentPane().printAll(g);


        return PAGE_EXISTS; // Page exists (offsets start at zero!)

    }
    public void actionPerformed(ActionEvent e) {

        PrinterJob job = PrinterJob.getPrinterJob(); // Get the printer's job list
        job.setPrintable(this); // We print with this class (btnPrintAction, which implements Printable)
        if (job.printDialog() == true) { // If we clicked OK in the print dialog
            try {
                job.print();
            } catch (PrinterException ex){
                // It did not work (PrinterException thrown), so add any error handling routines.
                JOptionPane.showMessageDialog(null, ex.toString(), "Printing Error",
                        JOptionPane.WARNING_MESSAGE);
            }
        }

    }
}

您对如何实现这一目标有什么想法吗？我需要让这个工作。非常感谢您的帮助。谢谢。

Answer 1

定义用于打印的图形的剪辑区域。

g.setClip(int x, int y, int width, int height)

其中剪辑参数是面板边界。