GridBagLayout problem

[colin shuker]

Hi, I've written some code below to add some Buttons and JTextFields to a frame. The submit button is in the wrong place. I would like the submit button to be 2 cells taller, so that it begins at the top of 10 and ends at the bottom of 70, to create a rectangle with the JTextFields.
I've tried several ways but have only been able to do this using empty JPanels (but I don't like this method since it leaves small grey squares on the screen, which show up when you are using a background image).

The code is below, any ideas are appreciated

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
 
public class GB2 extends JPanel
{
   public GB2()
   {
 
      Font bigfont=new Font("Serif",Font.PLAIN,36);
      setLayout(new GridBagLayout());
      GridBagConstraints c=new GridBagConstraints();
         
      
 
      c.gridx=0; c.gridy=0;
      c.weightx=1; c.weighty=1;
      c.anchor=GridBagConstraints.SOUTHEAST;
      add(new JTextField("10",8),c);
 
      c.gridx=0; c.gridy=1;
      c.weightx=0; c.weighty=0;
      add(new JTextField("20",8),c);
 
      c.gridx=0; c.gridy=2;
      c.weightx=0; c.weighty=0;
      add(new JTextField("30",8),c);
 
      c.gridx=0; c.gridy=3;
      c.weightx=0; c.weighty=0;
      add(new JTextField("40",8),c);
 
      c.gridx=0; c.gridy=4;
      c.weightx=0; c.weighty=0;
      add(new JTextField("50",8),c);
 
      c.gridx=0; c.gridy=5;
      c.weightx=0; c.weighty=0;
      add(new JTextField("60",8),c);
 
      c.gridx=0; c.gridy=6;
      c.weightx=0; c.weighty=1;
      c.anchor=GridBagConstraints.NORTHEAST;
      add(new JTextField("70",8),c);
 

      // submit button
      c.gridx=1; c.gridy=1;
      c.weightx=0; c.weighty=0;
      c.fill=GridBagConstraints.VERTICAL; 
      c.gridheight=5;
      add(new Button("Submit"),c);
      c.fill=GridBagConstraints.NONE; 
 
      // back button
      c.gridx=2; c.gridy=7;
      c.weightx=0; c.weighty=0;      
      add(new Button("Back"),c);
 
      // next button
      c.gridx=3; c.gridy=7;
      c.weightx=0; c.weighty=0;
      add(new Button("Next"),c);
   }
 
  
 
   public static void main(String[] args)
   {
      JFrame f=new JFrame("GridBag Example 2");
      
      f.getContentPane().add(new GB2(),
        BorderLayout.CENTER);
      f.pack();
      f.setSize(500,500);
      f.setVisible(true);
   }
}
 

 

[Michael Dunn]

see if this is any closer to what you're trying to do

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
 
class GB2 extends JPanel
{
   public GB2()
   {
      JPanel tfPanel = new JPanel(new GridLayout(7,1));
      for(int x = 10; x <= 70; x+=10) tfPanel.add(new JTextField(""+x,8));
      setLayout(new GridBagLayout());
      GridBagConstraints c = new GridBagConstraints();
      c.fill = GridBagConstraints.BOTH;
      c.gridx=0;
      c.gridy=0;
      c.weightx = 2;
      add(tfPanel,c);
      c.gridx = 2;
      c.weightx = 1;
      add(new Button("Submit"),c);
   }
   public static void main(String[] args)
   {
      JFrame f=new JFrame("GridBag Example 2");
      f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      JPanel topPanel = new JPanel(new GridBagLayout());
      topPanel.add(new GB2(),new GridBagConstraints());
      JPanel bottomPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT));
      bottomPanel.add(new JButton("Back"));
      bottomPanel.add(new JButton("Next"));
      f.getContentPane().add(topPanel,BorderLayout.CENTER);
      f.getContentPane().add(bottomPanel,BorderLayout.SOUTH);
      f.pack();
      f.setSize(500,500);
      f.setVisible(true);
   }
}