Re: GridBagLayout not behaving as specified

Qu0ll wrote:
"Ian Wilson" <scobloke2@xxxxxxxxxxxxx> wrote

[snip]

I think you could use fewer than 16 columns and this might make things more predictable. I suspect some columns are shrinking to zero width because no component STARTS in them.

I have indeed tried fewer columns and the results are identical. I have tried as few as 6 columns which is the minimum required to get the results I desire. It just doesn't seem to work as it should.

Personally I'd use MigLayout and have about 1/10th the code.

I have never used it but I really need to understand why this code is failing. Any other ideas?

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;

import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

public class GBTest extends JFrame {

private JPanel panel = new JPanel();
private JLabel userLabel = new JLabel("User:");
private JLabel passwordLabel = new JLabel("Password:");
private JLabel dbLabel = new JLabel("Database:");
private JTextField userTextField = new JTextField();
private JTextField dbTextField = new JTextField();
private JPasswordField passwordField = new JPasswordField(8);

private JButton dbButton = new JButton("...");

public GBTest() {
setLayout(new BorderLayout());
panel.setLayout(new GridBagLayout());

userLabel.setText("User:");
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
gbc.gridwidth = 1;
gbc.anchor = GridBagConstraints.EAST;
gbc.insets = new Insets(0, 4, 18, 0);
gbc.ipadx = 0;
panel.add(userLabel, gbc);

gbc.gridx = 1;
gbc.gridy = 0;
gbc.gridwidth = 1;
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.weightx = 0.5;
gbc.weighty = 0.0;
gbc.insets = new Insets(0, 4, 18, 4);
gbc.ipadx = 40;
panel.add(userTextField, gbc);

gbc = new GridBagConstraints();
gbc.gridx = 2;
gbc.gridy = 0;
gbc.gridwidth = 1;
gbc.anchor = GridBagConstraints.EAST;
gbc.insets = new Insets(0, 4, 18, 0);
gbc.ipadx = 0;
panel.add(passwordLabel, gbc);

gbc.gridx = 3;
gbc.gridy = 0;
gbc.gridwidth = 2;
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.weightx = 0.5;
gbc.weighty = 0.0;
gbc.insets = new Insets(0, 4, 18, 8);
gbc.ipadx = 0;
panel.add(passwordField, gbc);

gbc.gridx = 0;
gbc.gridy = 1;
gbc.gridwidth = 1;
gbc.anchor = GridBagConstraints.EAST;
gbc.insets = new Insets(0, 4, 18, 0);
gbc.ipadx = 0;
panel.add(dbLabel, gbc);

gbc.gridx = 1;
gbc.gridy = 1;
gbc.gridwidth = 3;
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.weightx = 10;
gbc.weighty = 0.0;
gbc.insets = new Insets(0, 4, 18, 0);
gbc.ipadx = 0;
panel.add(dbTextField, gbc);

gbc.gridx = 4;
gbc.gridy = 1;
gbc.gridwidth = 1;
gbc.fill = GridBagConstraints.NONE;
gbc.anchor = GridBagConstraints.EAST;
gbc.weightx = 0.0;
gbc.weighty = 0.0;
gbc.insets = new Insets(0, 4, 18, 8);
gbc.ipadx = 0;
panel.add(dbButton, gbc);

add(panel, BorderLayout.CENTER);

pack();
setPreferredSize(new Dimension(400, 250));
setSize(new Dimension(400, 250));
setLocationRelativeTo(null);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
new GBTest().setVisible(true);
}
});
}
}
.

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