Cant able to set Background color for panel..

[karthik tvn]

Hi to all,

I have three panel.. consider panel1 ,panel 2 and panel3
The panel1's & panel2's Layout is Border Layout.
The panel2 is added into panel1's Border Layout center..
The panel3 is added into panel2's Border Layout center...

Now i was not able to set the background color for panel3....
But if i add the panel3 into panel2's Border Layout east, (or west or south or north) then i can able to set background color..


only if i am put into border layout center then only i was not able to set background color...

whats reason? please anybody give solution...i will be thankful...

[Campbell Ritchie]

Don't know . . . but something makes me think you are adding the 3 panels on top of each other. If that is the case, then you have changed the colours, you just can't see them!

[G Estes]

Is this what you are trying? If so, this worked just fine for me...

 
   private void doColorPanel()
   {
      JFrame frame = new JFrame();
 
      JPanel p1 = new JPanel(new BorderLayout());
      JPanel p2 = new JPanel(new BorderLayout());
      JPanel p3 = new JPanel(new BorderLayout());
      p3.setBackground(Color.RED);
      p3.setPreferredSize(new Dimension(300,300));
 
      p2.add(p3, BorderLayout.EAST);
      p1.add(p2, BorderLayout.EAST);
      frame.add(p1);
 
      frame.setPreferredSize(new Dimension(400,400));
      frame.pack();
 
      frame.show();
   }

The reason yours may not be working is that the CENTER object will occupy all un-used space. The EAST and WEST are not the same. Give your panel 3 a preferred size and you will see it...
[ July 30, 2008: Message edited by: Gil Estes ]

[karthik tvn]

Thanks for reply...
i try this and i will pass comments...

Here you add panel p3 into Border Layout East...
p2.add(p3, BorderLayout.EAST);
but i need, add p3 into Border Layout CENTER...

[G Estes]

I tried that too and it worked. The issue you were having (I suspect) is no preferred size for the colorized panel.

Cheers!

[karthik tvn]

Thanks for reply...
i try this and i will pass comments...

Here you add panel p3 into Border Layout East...
p2.add(p3, BorderLayout.EAST);
but i need, add p3 into Border Layout CENTER...

[G Estes]

karthikkumar, did it work?

[Benjamin Kastelic]

Hello everbody!
I too have a similar problem like karthik...

   /*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package tetris;

/**
 *
 * @author Benjamin
 */
import java.awt.Color;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;

/**
 *
 * @author Benjamin
 */
public class TetrisOkvir extends JFrame {

    private JMenu meni = new JMenu();
    private JMenuItem izhod = new JMenuItem();
    private JMenuBar menivrstica = new JMenuBar();
    static JLabel labela = new JLabel();
    static JLabel labela2 = new JLabel();
    static JButton knof = new JButton();
    private static IgralnaPlata plata = new IgralnaPlata();
    private static PredogledPlata predogled = new PredogledPlata();

    /**
     *
     */
    public TetrisOkvir() {
        JPanel content = new JPanel();
        //labeli za izpis točk in stopnje             ///
        labela.setText("Točke:   " + Integer.toString(plata.padel));
        labela2.setText("Stopnja: " + Integer.toString(plata.stopnja));
        knof.setText("Začni");
        meni.setText("Meni");
        izhod.setText("Izhod");
        //****************************//
        plata.setFocusable(true);
        content.setLayout(null);
        content.setBackground(new Color(240,240,240));

        izhod.addActionListener(new java.awt.event.ActionListener() {

            public void actionPerformed(java.awt.event.ActionEvent evt) {
                System.exit(1);
            }
        });
        meni.add(izhod);
        menivrstica.add(meni);
        setJMenuBar(menivrstica);
        content.add(predogled);
        content.add(labela);
        content.add(labela2);
        content.add(knof);
        content.add(plata);
        predogled.setBounds(350, 50, 150, 150);
        labela.setBounds(350, 300, 300, 20);
        labela2.setBounds(350, 330, 300, 20);
        predogled.setBackground(Color.BLACK);
        plata.setBackground(Color.BLACK);
        //predogled.setOpaque(true);
        //predogled.setForeground(Color.BLACK);
        predogled.setPreferredSize(new Dimension(150,150));
        plata.setPreferredSize(new Dimension(299,600));


        //gumb Začni
        knof.setBounds(350, 360, 100, 20);
        knof.setEnabled(true);
        knof.setFocusable(false);
        knof.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent event) {
                plata.padel();
                System.out.println("pritisk gumba");
            }
        });
        //**************************************************//
        plata.setBounds(0, 0, 299, 600);
        setContentPane(content);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLocationRelativeTo(null);
        pack();
    }

    /**
     *
     * @param args
     */
    public static void main(String[] args) {
        JFrame okno = new TetrisOkvir();
        okno.setTitle("Tetris");
        okno.setSize(555, 650);
        okno.setLocationRelativeTo(null);
        okno.setResizable(false);
        okno.setVisible(true);
        while (plata.th.isAlive()) {
            predogled.repaint();

        }
    }
}
 

that my Frame class for tetrism and i can't seem to set the background color for any of the JPanels, the color is shown only ont the borders.
Please help if you can.

Benjamin

[Rob Spoor]

Please don't hijack month old threads.

[Benjamin Kastelic]

k, so i'll make a new one