Can't display border (extends JPanel)

[Uwe Pfeifer]

Hi. I'm trying to make a border around a picture I display:

        picPanel.setBackground(Color.darkGray);
        picPanel.setBorder(BorderFactory.createEmptyBorder(10,10,10,2));

The border is not displayed my picture always uses the full width and height of the panel.
and

    class picturePanel extends JPanel {
        public void paintComponent(Graphics g) {
            java.net.URL coffeeFull = MyCoffee.class.getResource("/coffeefull.jpg");
            java.net.URL coffeeEmpty = MyCoffee.class.getResource("/coffeeempty.jpg");
            //java.net.URL coffeeFull = MyCoffee.class.getResource("coffeefull.jpg");
            //java.net.URL coffeeEmpty = MyCoffee.class.getResource("coffeeempty.jpg");
            Image image;
            Image newImage = null;

            System.out.println(picPanel.getHeight());
            if(coffeeFull == null && coffeeEmpty == null) {
                System.out.println("Pic URL References empty.");
            }

            if(coffee == 1 && coffeeFull != null) {
                image = new ImageIcon(coffeeFull).getImage();
                newImage = image.getScaledInstance(picPanel.getWidth(), picPanel.getHeight(),  java.awt.Image.SCALE_SMOOTH);
                image = new ImageIcon(newImage).getImage();
            } else if(coffee == 0 && coffeeEmpty != null) {
                image = new ImageIcon(coffeeEmpty).getImage();
                newImage = image.getScaledInstance(picPanel.getWidth(), picPanel.getHeight(),  java.awt.Image.SCALE_SMOOTH);
                image = new ImageIcon(newImage).getImage();
            } else {
                image = null;
            }
            g.drawImage(image,0,0,this);
        }
    }

As you can see I use: picPanel.getWidth(), picPanel.getHeight(), java.awt.Image.SCALE_SMOOTH to get the height and width for my picture and it uses full size of the panel. But I want the panel to have a 10px border like the menu has.

Can anyone help me with this? Thank you!

[Uwe Pfeifer]

I already tried:

newImage = image.getScaledInstance(picPanel.getWidth()-10, picPanel.getHeight(), java.awt.Image.SCALE_SMOOTH);

so -10 of the width but then it only shows a border in not the dark gray color of the panel on the rigth side of the panel, or an empty space or what it is.

[Rob Spoor]

Query the panel's insets and use its left and top to start painting. You can also clip the graphics object:

Graphics g2 = g.create(insets.left, insets.top, insets.right - insets.left, insets.bottom - insets.top);
try {
    // draw on g2; nothing can be painted outside of the clipped region
} finally {
    g2.dispose();
}

Just remember that after clipping like this, you should use 0,0 to start painting. Apart from clipping, the create method also translates the graphics object.

[Uwe Pfeifer]

How do I get insets? And what is to clip the graphics object? I don't really get this. And with draw on g2 do you mean i should do: g2.drawImage(image,0,0,this);?
Sorry, I'm totally new to this.

[Uwe Pfeifer]

maybe i should ask again in the beginning java forum?

[Rob Spoor]

Uwe Pfeifer wrote:How do I get insets?

Perhaps using the getInsets() method?

And what is to clip the graphics object? I don't really get this.

http://docs.oracle.com/javase/tutorial/2d/advanced/clipping.html
But you should probably read all of http://docs.oracle.com/javase/tutorial/2d/index.html.

And with draw on g2 do you mean i should do: g2.drawImage(image,0,0,this);?

Yes.

[Uwe Pfeifer]

ok thank you very much for your help, I'll have a look into all that ;D