Nested Layouts

[Erik Dark]

I tried to nest 2 GridLayouts in a BorderLayout which was nested in another BorderLayout but can't seem to make it work....
Does anyone have suggestions?
Erik Dark

[Joe Gilvary]

It should work. I have nested lots of things in
GridBagLayout before.
Can you post an example of your code?
Thanks,
Joe

[Erik Dark]

 import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class Scribble1 extends JFrame
{
  JButton btnRed    = new JButton("Red");
  JButton btnGreen  = new JButton("Green");
  JButton btnBlue   = new JButton("Blue");
  JButton btnBlack  = new JButton("Black");
  JButton btnErase  = new JButton("Erase");
  JScrollBar sbrRed   = new JScrollBar(JScrollBar.HORIZONTAL,56,1,0,256);
  JScrollBar sbrGreen = new JScrollBar(JScrollBar.HORIZONTAL,128,1,0,256);
  JScrollBar sbrBlue  = new JScrollBar(JScrollBar.HORIZONTAL,200,1,0,256);
  JLabel labelRed = new JLabel("RED");
  JLabel labelGreen = new JLabel("GREEN");
  JLabel labelBlue = new JLabel("BLUE");
  JPanel panCanvas  = new JPanel();
  JPanel panDraw    = new JPanel();
  JPanel panSouth   = new JPanel();
  JPanel panEast    = new JPanel();
  JPanel panSouthWest = new JPanel();
  JPanel panSouthCenter = new JPanel();
  public Scribble1()
  {
    initGUI();
  }
  private void initGUI()
  {
    panEast.setLayout(new GridLayout(6,1));
panSouth.setLayout(new BorderLayout() );
    panEast.add(btnRed);
    panEast.add(btnGreen);
    panEast.add(btnBlue);
    panEast.add(btnBlack);
    panEast.add(btnErase);
    panEast.add(panCanvas);
    getContentPane().add(panDraw, BorderLayout.CENTER);
    getContentPane().add(panSouth, BorderLayout.SOUTH);
    getContentPane().add(panEast, BorderLayout.EAST);
getContentPane().add(panSouth, BorderLayout.SOUTH);
getContentPane().add(panSouthCenter, BorderLayout.CENTER);
    getContentPane().add(panSouthWest, BorderLayout.WEST);
    panSouthWest.setLayout(new GridLayout(3,1));
panSouthCenter.setLayout(new GridLayout(3,1));
panSouthWest.add(labelRed);
panSouthWest.add(labelGreen);
panSouthWest.add(labelBlue);
panSouthCenter.add(sbrRed);sbrRed.setBackground(Color.red) ;
panSouthCenter.add(sbrGreen);sbrGreen.setBackground(Color.green) ;
    panSouthCenter.add(sbrBlue);sbrBlue.setBackground(Color.blue) ;
    setSize(400,400);
    setVisible(true);
  }
// startup
    public static void main ( String[] argv )
    {
Scribble1 scribble1 = new Scribble1();
    }
} 

The labels should be besides the scrollbars in the south...

[Paul Stevens]

You didn't place anything in the south. You create a panSouth panel add it to your main layout but do not add anything to it. You place 2 items in the center. I have reformatted your code a little and placed some comments in it. Updated to what I think you wanted.

private void initGUI()
{
//set layouts
panEast.setLayout(new GridLayout(6,1));
panSouth.setLayout(new BorderLayout() );
panSouthWest.setLayout(new GridLayout(3,1));
panSouthCenter.setLayout(new GridLayout(3,1));
//add to east panel
panEast.add(btnRed);
panEast.add(btnGreen);
panEast.add(btnBlue);
panEast.add(btnBlack);
panEast.add(btnErase);
panEast.add(panCanvas);
//add to south west panel   
panSouthWest.add(labelRed);
panSouthWest.add(labelGreen);
panSouthWest.add(labelBlue);
//add to south center panel  
panSouthCenter.add(sbrRed); 
sbrRed.setBackground(Color.red) ;
panSouthCenter.add(sbrGreen); 
sbrGreen.setBackground(Color.green) ;
panSouthCenter.add(sbrBlue); 
sbrBlue.setBackground(Color.blue) ;
//add to south
panSouth.add(panSouthWest, BorderLayout.WEST);
panSouth.add(panSouthCenter, BorderLayout.CENTER);
//add to main frame
getContentPane().add(panDraw, BorderLayout.CENTER);
getContentPane().add(panEast, BorderLayout.EAST);
getContentPane().add(panSouth, BorderLayout.SOUTH);         

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

[ January 29, 2002: Message edited by: Paul Stevens ]

[Erik Dark]

Thanks a lot Paul!
I'm quite new to awt/swing and puzzled my brain out to get what you seem to have done in...
It's not only the result but I see where I was mistaken. Thanks.

Erik Dark

[Paul Stevens]

If you wanted more normal sized buttons, you could place a panel with vertical box layout in the east and place your buttons on it. You were close.