Some More GridBagLayout Help!

[Shawn Rieger]

I can't get the controls to fill out properly. This is what Im going for...

column:
   1      2      3      4      5
[     ][     ][     ][     ][     ]
Blank label  TextField  Button

for some reason it fills the controls out as if there were only 3 columns? I don't understand. Even when I make the label occupy col 1 and 2 it does the same thing. AAm I missing something here?

import java.awt.*;
import javax.swing.*;
 
public class PaintTest extends JFrame {

public static void main(String[] args) {
PaintTest frame = new PaintTest();
frame.setSize(420, 380);
//frame.setResizable(false);
frame.setTitle("Paint Estimator");
frame.setVisible(true);
}

private JPanel pnlMid = new JPanel();
private JLabel lblWidth = new JLabel("Width",JLabel.RIGHT);
private JLabel lblHeight = new JLabel("Height",JLabel.RIGHT);
private JTextField txtWidth = new JTextField("0");
private JTextField txtHeight = new JTextField("0");
private JButton btnAdd = new JButton("Add");
private JButton btnInsert = new JButton("Insert");
private JButton btnModify = new JButton("Modify");
private JButton btnDelete = new JButton("Delete");

public PaintTest() {

Container con = getContentPane();
con.setLayout(new GridBagLayout());

GridBagConstraints gbc = new GridBagConstraints();
gbc.fill = GridBagConstraints.BOTH;
gbc.anchor = GridBagConstraints.EAST;
//gbc.insets = new Insets(2,2,2,2);

addComp(lblWidth,con,gbc,0,0,1,2,1,0);
addComp(txtWidth,con,gbc,0,2,1,2,5,0);
addComp(btnAdd,con,gbc,  0,4,1,1,5,0);

}
 
private void addComp(Component c, Container container, GridBagConstraints gbc, int row, int column,
int numberOfRows, int numberOfColumns,
double weightx, double weighty) {
gbc.gridx = column;
gbc.gridy = row;
gbc.gridwidth = numberOfColumns;
gbc.gridheight = numberOfRows;
gbc.weightx = weightx;
gbc.weighty = weighty;
container.add(c, gbc);
}
}

[ September 08, 2005: Message edited by: Shawn Rieger ]

[ September 08, 2005: Message edited by: Shawn Rieger ]

[ September 08, 2005: Message edited by: Shawn Rieger ]
[ September 08, 2005: Message edited by: Shawn Rieger ]

[Craig Wood]

You are adding three components so you will get three apparent columns showing. If you are
going to add components in all five columns somewhere in rows that follow, ie, if there will
be at least one component in each of the "5" columns somewhere in the layout, then
GridBagLayout will size the columns to show the components at their preferred size plus any
additional space as allocated by the judicious use of the weight constraints. If you must
fill out the first row with 5 columns you can add blank labels with or without setting their
preferred size. You might try adding all the components to the layout and then make
adjustemnts as you feel your way toward success. If you want all the cells to be equal width
you might consider using GridLayout for some (each row) or all of the layout.

[Shawn Rieger]

Yes, but with GridLayout I can't strech coponent across 2 or more cells can I?

[Stephen Boston]

Sure you can. I added your btnInsert button and made it 4 wide on the next row.

Is that what you were looking for?

Steve
[Edit} Sorry I miss read your question. Just ignore this.

import java.awt.*;
import javax.swing.*;
 
public class PaintTest extends JFrame {

public static void main(String[] args) {
PaintTest frame = new PaintTest();
frame.setSize(420, 380);
//frame.setResizable(false);
frame.setTitle("Paint Estimator");
frame.setVisible(true);
}

private JPanel pnlMid = new JPanel();
private JLabel lblWidth = new JLabel("Width",JLabel.RIGHT);
private JLabel lblHeight = new JLabel("Height",JLabel.RIGHT);
private JTextField txtWidth = new JTextField("0");
private JTextField txtHeight = new JTextField("0");
private JButton btnAdd = new JButton("Add");
private JButton btnInsert = new JButton("Insert");
private JButton btnModify = new JButton("Modify");
private JButton btnDelete = new JButton("Delete");

public PaintTest() {

Container con = getContentPane();
con.setLayout(new GridBagLayout());

GridBagConstraints gbc = new GridBagConstraints();
gbc.fill = GridBagConstraints.BOTH;
gbc.anchor = GridBagConstraints.EAST;
//gbc.insets = new Insets(2,2,2,2);

addComp(lblWidth,con,gbc,0,0,1,2,1,0);
addComp(txtWidth,con,gbc,0,2,1,2,5,0);
addComp(btnAdd,con,gbc,  0,4,1,1,5,0);
addComp(btnInsert,con,gbc,1,0,4,0,0,0);

}
 
private void addComp(Component c, Container container, GridBagConstraints gbc, int row, int column,
int numberOfRows, int numberOfColumns,
double weightx, double weighty) {
gbc.gridx = column;
gbc.gridy = row;
gbc.gridwidth = numberOfColumns;
gbc.gridheight = numberOfRows;
gbc.weightx = weightx;
gbc.weighty = weighty;
container.add(c, gbc);
}
  

[ September 09, 2005: Message edited by: Stephen Boston ]