Java JPanel tiled background image

Question

I currently have the code for creating a JOptionPane that tiles an image to the background no matter the size I set it to :)

package test;
import java.awt.*;         


        

Answer 1

To correct the issue you're currently having, you can set your TiledImage object as the content pane of your JFrame, and then ensure any panels that get added onto it are not opaque.

That is,

public static void main(String[] args) throws IOException {  
    mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    BufferedImage image = ImageIO.read(new File("./resource/patterngrey.png"));  
    TiledImage backgroundImage = new TiledImage(image);  
    // Make backgroundImage the content pane.
    mainFrame.setContentPane(backgroundImage);
    mainFrame.setLayout(new BorderLayout());
    // Make the userDetailsPanel not opaque.
    userDetailsPanel.setOpaque(false);
    mainFrame.add(userDetailsPanel, BorderLayout.CENTER);

    mainFrame.setSize(400,400);
    mainFrame.setVisible(true);
}  

Answer 2

You state:

Any and all help is appreciated if there is a better way of doing it that is a lot less code that would also be great.

That's not a lot of code actually. The only thing else I could suggest is that if the JPanel is not going to vary in size, create a background BufferedImage, draw your tiled images in that, and then draw the one background image in either your JPanel's paintComponent method, or in a JLabel's icon. If you go the latter route, then give the JLabel a layout manager so that it can act as a well-behaved container for your components. And make sure that anything on top of your tiled containers is not opaque if the image needs to show through, especially JPanels.

Answer 3

An instance of java.awt.TexturePaint provides a convenient way to tile a BufferedImage. Related examples may be seen here. Given a TexturePaint, you can fill a component's background fairly easily, as shown here.

    private TexturePaint paint;

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        Graphics2D g2d = (Graphics2D) g;
        g2d.setPaint(paint);
        g2d.fillRect(0, 0, getWidth(), getHeight());
    }