Printing jPanel prints the panel and the frame with a grey background

[mes123]

Ok, solved the original problem but now have a new one thats totally got me.

The story so far: A jFrame containing two jPanels. Panel one has a button labeled 'print'. Panel two has a nice picture of a square and a circle.

When the print button is pressed the printer springs to life and out pops a printed page.

Two problems.

The page has a double image on it. The jpanel with the picture is printed and over the top of this the whole jframe has been printed.

Why is this, since (see code below) the printerjob object has only had the jpanel set as it's printable?

The second problem is that the background is grey and not white.

Help!

public class ggtest extends javax.swing.JFrame {
    
    /** Creates new form  */
    public ggtest() {
        initComponents();
    }
 
    private void initComponents() {
        control = new javax.swing.JPanel();
        jButton1 = new javax.swing.JButton();
        contentx = new TestCanvas();

        getContentPane().setLayout(new org.netbeans.lib.awtextra.AbsoluteLayout());

        addWindowListener(new java.awt.event.WindowAdapter() {
            public void windowClosed(java.awt.event.WindowEvent evt) {
                exiting(evt);
            }
            public void windowClosing(java.awt.event.WindowEvent evt) {
                exitForm(evt);
            }
        });

        control.setBorder(new javax.swing.border.LineBorder(new java.awt.Color(0, 0, 0)));
        jButton1.setText("Print");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        control.add(jButton1);
    
        getContentPane().add(control, new org.netbeans.lib.awtextra.AbsoluteConstraints(0, 0, 410, 50));

        contentx.setBorder(new javax.swing.border.LineBorder(new java.awt.Color(0, 0, 0)));
        getContentPane().add(contentx, new org.netbeans.lib.awtextra.AbsoluteConstraints(0, 50, 410, 400));

        pack();
    }

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
        PrinterJob printjob = PrinterJob.getPrinterJob();
        printjob.setPrintable(contentx);
        try {
            printjob.print();
        } catch (Exception e){};

    }

    public static void main(String args[]) {
        new ggtest().show();
    }

    // Variables declaration 
    private TestCanvas contentx;
    private javax.swing.JPanel control;
    private javax.swing.JButton jButton1;
    // End of variables declaration
  
    class TestCanvas extends JPanel implements Printable {
        private Rectangle2D.Double square, square2;
        private Ellipse2D.Double circle;
        
        public TestCanvas (){
            super();
            this.setBackground(Color.white);
        }
        
        public void paintComponent(Graphics g) {
            Graphics2D g2d = (Graphics2D)g;
            square =  new Rectangle2D.Double(5,5, 390, 390);
            square2 =  new Rectangle2D.Double(177, 177, 50, 50);
            circle =  new Ellipse2D.Double(5, 5, 390, 390);
            
            g2d.setStroke(new BasicStroke(4));
            g2d.draw(square2);
            g2d.draw(square);
            g2d.draw(circle);
            
        }
        
        public int print(Graphics g, PageFormat pageFormat, int pageIndex) {
            
            int x = (int)pageFormat.getImageableX();
            int y = (int)pageFormat.getImageableY();
            Graphics2D g2d = (Graphics2D)g;
            g2d.translate(x, y);
            if (pageIndex == 0) {
                paint(g2d);
                return Printable.PAGE_EXISTS;
            } else {
                return Printable.NO_SUCH_PAGE;
            }
        }
        
    }

    
}

 

[mes123]

we now have a white background
getContentPane.setBAckground(Color.white);

But I still get the two images on top of each other.

 

[Diancecht]

Maybe this helps you:

http://java.sun.com/developer/JDCTechTips/2004/tt0611.html#2

Cheers,
Dian

 

[mes123]

the solutions were as follows:

The grey background. Although the jpanel has its background set to white, the contentpane was still grey so

getContentPane().setBackground(Color.white);

solved the problem

Fram printing over the jpanel:
This was because my extended jPanel had a method paintComponent. When I renamed this method to paint the problem dissappeared. Not entiry sure why but it worked!