Java Swing GridBagLayout Problem

hemanthjava · #1 (**permalink**) 06-29-2008, 07:13 PM

Hello All,

I have a problem with the GridBagLayout when it comes to laying out the components. I tried the gridbaglayout and ended up with a lot of spaces in between components. What I actually was looking for is as shown in the second pic.

Could you please help me. I have included the code also. I tried changing the ipadx, ipady values but it did not help. I am not sure how weightx, weighty work. I never really understand them

Code:

import java.awt.Container;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;

import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JRadioButton;
import javax.swing.JTextArea;
import javax.swing.JTextField;

public class GridBagLayoutDemo {

	private static JLabel jlbName;
	private static JLabel jlbAge;
	private static JLabel jlbSex;
	private static JLabel jlbAddress;
	private static JLabel jlbCity;
	private static JLabel jlbState;
	private static JTextField jtfName;
	private static JTextField jtfAge;
	private static JTextArea jtaAddress;
	private static JTextField jtfState;
	private static JTextField jtfCity;
	private static JRadioButton jrbMale;
	private static JRadioButton jrbFemale;
	private static Container pane = null;
	private static JButton jbtSubmit;

	public static void addComponentsToPane(JFrame frame) {

		pane = frame.getContentPane();
		ButtonGroup group = new ButtonGroup();
		group.add(jrbMale);
		group.add(jrbFemale);

		GridBagConstraints gBC = new GridBagConstraints();
		gBC.fill = GridBagConstraints.HORIZONTAL;
		gBC.insets = new Insets(5, 5, 0, 5);

		jlbName = new JLabel("Name : ");
		// gBC.weightx = 0.5;
		gBC.gridx = 0;
		gBC.gridy = 0;
		pane.add(jlbName, gBC);

		jtfName = new JTextField(20);
		gBC.gridx = 1;
		gBC.gridy = 0;
		pane.add(jtfName, gBC);

		jlbAge = new JLabel("Age : ");
		gBC.gridx = 0;
		gBC.gridy = 1;
		pane.add(jlbAge, gBC);

		jtfAge = new JTextField(5);
		gBC.gridx = 1;
		gBC.gridy = 1;
		gBC.fill = GridBagConstraints.NONE;
		pane.add(jtfAge, gBC);

		gBC.fill = GridBagConstraints.HORIZONTAL;

		jlbSex = new JLabel("Sex : ");
		gBC.gridx = 0;
		gBC.gridy = 2;
		pane.add(jlbSex, gBC);

		jrbMale = new JRadioButton("Male");
		gBC.gridx = 1;
		gBC.gridy = 2;
		pane.add(jrbMale, gBC);

		jrbFemale = new JRadioButton("Female");
		gBC.gridx = 2;
		gBC.gridy = 2;
		pane.add(jrbFemale, gBC);

		jlbAddress = new JLabel("Address : ");
		gBC.gridx = 0;
		gBC.gridy = 4;
		pane.add(jlbAddress, gBC);

		jtaAddress = new JTextArea(5, 10);
		gBC.gridx = 1;
		gBC.gridy = 4;
		pane.add(jtaAddress, gBC);

		jlbCity = new JLabel("City : ");
		gBC.gridx = 0;
		gBC.gridy = 5;
		pane.add(jlbCity, gBC);

		jtfCity = new JTextField(10);
		gBC.gridx = 1;
		gBC.gridy = 5;
		pane.add(jtfCity, gBC);

		jlbState = new JLabel("State : ");
		gBC.gridx = 2;
		gBC.gridy = 5;
		pane.add(jlbState, gBC);

		jtfState = new JTextField(10);
		gBC.gridx = 3;
		gBC.gridy = 5;
		pane.add(jtfState, gBC);

		jbtSubmit = new JButton("Submit");
		gBC.gridx = 3;
		gBC.gridy = 6;
		pane.add(jbtSubmit, gBC);

	}

	private static void createAndShowGUI() {

		JFrame frame = new JFrame("GridBagLayout Demo");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.getContentPane().setLayout(new GridBagLayout());
		// Set up the content pane.
		addComponentsToPane(frame);
		frame.pack();
		frame.setVisible(true);
	}

	public static void main(String[] args) {
		javax.swing.SwingUtilities.invokeLater(new Runnable() {
			public void run() {
				createAndShowGUI();
			}
		});
	}
}

Regards,
Hemanth

hardwired · #2 (**permalink**) 06-29-2008, 09:51 PM

You don't need to change weight or ipad constraints for this layout.
Works okay now.

Code:

import java.awt.Container;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;

import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JRadioButton;
import javax.swing.JTextArea;
import javax.swing.JTextField;

public class GblRx {
    private JTextField jtfName;
    private JTextField jtfAge;
    private JTextArea jtaAddress;
    private JTextField jtfState;
    private JTextField jtfCity;
    private JRadioButton jrbMale;
    private JRadioButton jrbFemale;
    private JButton jbtSubmit;

    public void addComponentsToPane(JFrame frame) {
        Container pane = frame.getContentPane();
        ButtonGroup group = new ButtonGroup();
        group.add(jrbMale);
        group.add(jrbFemale);

        GridBagConstraints gBC = new GridBagConstraints();
        gBC.fill = GridBagConstraints.HORIZONTAL;
        gBC.insets = new Insets(5, 5, 0, 5);

        JLabel jlbName = new JLabel("Name : ");
        gBC.gridx = 0;
        gBC.gridy = 0;
        pane.add(jlbName, gBC);

        jtfName = new JTextField(20);
        gBC.gridx = 1;
        gBC.gridy = 0;
        gBC.gridwidth = 2;
        pane.add(jtfName, gBC);

        JLabel jlbAge = new JLabel("Age : ");
        gBC.gridx = 0;
        gBC.gridy = 1;
        gBC.gridwidth = 1;
        pane.add(jlbAge, gBC);

        jtfAge = new JTextField(5);
        gBC.gridx = 1;
        gBC.gridy = 1;
        gBC.fill = GridBagConstraints.NONE;
        gBC.anchor = GridBagConstraints.WEST;
        gBC.gridwidth = 2;
        pane.add(jtfAge, gBC);

        gBC.fill = GridBagConstraints.HORIZONTAL;

        JLabel jlbSex = new JLabel("Sex : ");
        gBC.gridx = 0;
        gBC.gridy = 2;
        gBC.gridwidth = 1;
        pane.add(jlbSex, gBC);

        jrbMale = new JRadioButton("Male");
        gBC.gridx = 1;
        gBC.gridy = 2;
        pane.add(jrbMale, gBC);

        jrbFemale = new JRadioButton("Female");
        gBC.gridx = 2;
        gBC.gridy = 2;
        pane.add(jrbFemale, gBC);

        JLabel jlbAddress = new JLabel("Address : ");
        gBC.gridx = 0;
        gBC.gridy = 3;//4;
        pane.add(jlbAddress, gBC);

        jtaAddress = new JTextArea(5, 10);
        gBC.gridx = 1;
        gBC.gridy = 3;//4;
        gBC.gridwidth = 2;
        pane.add(jtaAddress, gBC);

        JLabel jlbCity = new JLabel("City : ");
        gBC.gridx = 0;
        gBC.gridy = 4;//5;
        gBC.gridwidth = 1;
        pane.add(jlbCity, gBC);

        jtfCity = new JTextField(10);
        gBC.gridx = 1;
        gBC.gridy = 4;//5;
        gBC.gridwidth = 2;
        pane.add(jtfCity, gBC);

        gBC.gridwidth = 1;

        JLabel jlbState = new JLabel("State : ");
        gBC.gridx = 3;//2;
        gBC.gridy = 4;//5;
        gBC.insets.right = 0;
        pane.add(jlbState, gBC);

        gBC.insets.right = 5;

        jtfState = new JTextField(10);
        gBC.gridx = 4;//3;
        gBC.gridy = 4;//5;
        pane.add(jtfState, gBC);

        jbtSubmit = new JButton("Submit");
        gBC.gridx = 4;//3;
        gBC.gridy = 5;//6;
        pane.add(jbtSubmit, gBC);
    }

    public static void main(String[] args) {
        GblRx test = new GblRx();
        JFrame frame = new JFrame("GridBagLayout Demo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.getContentPane().setLayout(new GridBagLayout());
        test.addComponentsToPane(frame);
        frame.pack();
        frame.setVisible(true);
    }
}