Require Help with Layout (GridBag)

Hello All,

I need help with GridBagLayout. I get stuck until this stage many times and would not know how to proceed further. I need help on laying out the components according to the Layout as attached. WIth the solution given this time I will look into it more deeply and analyse where I went wrong. Please help.

Code is Shown Below

Code:

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

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

public class XCurrencyNumberFormatDemo {

        static JPanel jplMain = new JPanel();
        static JLabel jlbCurrencyIn = new JLabel();
        static JLabel jlbLocale = new JLabel();
        static JTextField jtfCurrencyIn = new JTextField();
        static JTextField jtfLocale = new JTextField();
        static JLabel jlbCurrencyOut = new JLabel();
        static JTextField jtfCurrencyOut = new JTextField();
        static JButton jbnCancel = new JButton("Cancel");
        static JButton jbnConvert = new JButton("Convert");

        public static void main(String args[]) {

                createGUI();

        }

        public static void createGUI() {
                JFrame frame = new JFrame("XNumberFormat Demo");

                frame.setLayout(new GridBagLayout());
                frame.setContentPane(jplMain);
                jplMain.setLayout(new GridBagLayout());
                GridBagConstraints gc = new GridBagConstraints();
                gc.gridx = 0;
                gc.gridy = 0;
                gc.fill = GridBagConstraints.BOTH;
                gc.weightx = 0.3;
                gc.weighty = 0.3;
                jplMain.add(jlbCurrencyIn, gc);

                gc.gridx = 1;
                gc.gridy = 0;
                jplMain.add(jtfCurrencyIn, gc);

                gc.gridx = 0;
                gc.gridy = 1;
                jplMain.add(jlbLocale, gc);

                gc.gridx = 1;
                gc.gridy = 1;
                jplMain.add(jtfLocale, gc);

                gc.gridx = 2;
                gc.gridy = 1;
                jplMain.add(jbnConvert, gc);
               
                gc.gridx = 0;
                gc.gridy = 2;
                jplMain.add(jlbCurrencyOut, gc);

                gc.gridx = 1;
                gc.gridy = 2;
                jplMain.add(jtfCurrencyOut, gc);
                jtfCurrencyOut.setEnabled(false);

                gc.gridx = 2;
                gc.gridy = 2;
                jplMain.add(jbnCancel, gc);

                frame.setVisible(true);
                frame.setSize(300, 400);
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        }

}

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Regards,
Hemanth

Code:

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import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;

public class XCurrencyNumberFormatDemo {

  static JPanel jplMain = new JPanel();
  //static JLabel jlbCurrencyIn = new JLabel();
  static JLabel jlbCurrencyIn = new JLabel("In Currency");
  //static JLabel jlbLocale = new JLabel();
  static JLabel jlbLocale = new JLabel("In Locale");
  //static JTextField jtfCurrencyIn = new JTextField();
  static JTextField jtfCurrencyIn = new JTextField(10);
  //static JTextField jtfLocale = new JTextField();
  static JTextField jtfLocale = new JTextField(10);
  //static JLabel jlbCurrencyOut = new JLabel();
  static JLabel jlbCurrencyOut = new JLabel("Out Currency");
  //static JTextField jtfCurrencyOut = new JTextField();
  static JTextField jtfCurrencyOut = new JTextField(10);
  static JButton jbnConvert = new JButton("Convert");
  static JButton jbnCancel = new JButton("Cancel");

  public static void main(String args[]) {
      SwingUtilities.invokeLater(new Runnable() {

        public void run() {
            new XCurrencyNumberFormatDemo().createGUI();
        }
      });
  }

  public void createGUI() {
      jbnCancel.setPreferredSize(jbnConvert.getPreferredSize());
     
      JFrame frame = new JFrame("XNumberFormat Demo");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.setSize(400, 400);
     
      //frame.setLayout(new GridBagLayout());
      jplMain.setLayout(new GridBagLayout());
      frame.setContentPane(jplMain);
     
      GridBagConstraints gbc = new GridBagConstraints();
      // Added
      Insets insets = new Insets(0, 10, 0, 10);
      gbc.insets = insets;
      //
      //gc.gridx = 0;
      //gc.gridy = 0;
      gbc.weightx = 0.3;
      gbc.weighty = 0.3;
      //gc.fill = GridBagConstraints.BOTH;
     
      jplMain.add(jlbCurrencyIn, gbc);

      gbc.gridx = 1;
      //gc.gridy = 0;
      jplMain.add(jtfCurrencyIn, gbc);

      gbc.gridx = 0;
      gbc.gridy = 1;
      jplMain.add(jlbLocale, gbc);

      gbc.gridx = 1;
      //gc.gridy = 1;
      jplMain.add(jtfLocale, gbc);

      gbc.gridx = 2;
      //gc.gridy = 1;
      jplMain.add(jbnConvert, gbc);

      gbc.gridx = 0;
      gbc.gridy = 2;
      jplMain.add(jlbCurrencyOut, gbc);

      gbc.gridx = 1;
      //gc.gridy = 2;
      jplMain.add(jtfCurrencyOut, gbc);
      jtfCurrencyOut.setEnabled(false);

      gbc.gridx = 2;
      //gc.gridy = 2;
      jplMain.add(jbnCancel, gbc);

      frame.setVisible(true);
  }
}

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db

My recommendation is to skip the gridbag whenever possible and do it with other nested layouts:

Code:

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import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.util.HashMap;
import java.util.Map;

import javax.swing.BorderFactory;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JComponent;
import javax.swing.JTextArea;
import javax.swing.JTextField;

public class XCur2
{
  private static final String[] LABELS = {"In Currency", "In Locale", "Out Currency"};
  private static final String CONVERT = "CONVERT";
  private static final String CANCEL = "CANCEL";
  private static final String[] BTN_STRINGS = {CONVERT, CANCEL};
  private static final Dimension MAIN_PANEL_SIZE = new Dimension(450, 160);
  private JPanel mainPanel = new JPanel();
  private Map<String, JTextField> textFieldMap = new HashMap<String, JTextField>();

  public XCur2()
  {
    JPanel labelPanel = createLabelPanel();
    JPanel textPanel = createTextPanel();
    JPanel buttonPanel = createButtonPanel();
    mainPanel.setPreferredSize(MAIN_PANEL_SIZE);
    mainPanel.setLayout(new BoxLayout(mainPanel, BoxLayout.LINE_AXIS));
    mainPanel.add(labelPanel);
    mainPanel.add(textPanel);
    mainPanel.add(buttonPanel);
  }
 
  private JPanel createLabelPanel()
  {
    JPanel labelPanel2 = new JPanel(new GridLayout(3, 1));
    labelPanel2.setBorder(BorderFactory.createLineBorder(Color.black));
    int leftBorder = 10;
    for (String labelString : LABELS)
    {
      JLabel label = new JLabel(labelString);
      label.setBorder(BorderFactory.createCompoundBorder(
          BorderFactory.createLineBorder(Color.black),
          BorderFactory.createEmptyBorder(0, leftBorder, 0, 0)));
      labelPanel2.add(label);
    }
    return labelPanel2;
  }
 
  private JPanel createTextPanel()
  {
    JPanel textPanel2 = new JPanel(new GridLayout(3, 1));
    textPanel2.setBorder(BorderFactory.createLineBorder(Color.black));
    int textareaSize = 12;
    for (String labelString : LABELS)
    {
      JTextField textfield = new JTextField(textareaSize);
      textFieldMap.put(labelString, textfield);
      JPanel tfpane = new JPanel(new GridBagLayout());
      tfpane.add(textfield, new GridBagConstraints());
      tfpane.setBorder(BorderFactory.createLineBorder(Color.black));
      textPanel2.add(tfpane);
    }
    return textPanel2;
  }
 
  private JPanel createButtonPanel()
  {
    Dimension btnSize = new Dimension(100, 28);
    JPanel bp = new JPanel(new GridLayout(3, 1));
    bp.setBorder(BorderFactory.createLineBorder(Color.black));
    JPanel emptyPanel = new JPanel();
    emptyPanel.setBorder(BorderFactory.createLineBorder(Color.black));
    bp.add(emptyPanel);
    for (String btnString : BTN_STRINGS)
    {
      JButton btn = new JButton(btnString);
      btn.setPreferredSize(btnSize);
      JPanel btnPane = new JPanel(new GridBagLayout());
      btnPane.add(btn, new GridBagConstraints());
      btnPane.setBorder(BorderFactory.createLineBorder(Color.black));
      bp.add(btnPane);
    }
    return bp;
  }

  public JComponent getComponent()
  {
    return mainPanel;
  }

  private static void createAndShowUI()
  {
    JFrame frame = new JFrame("XNumber Format Demo");
    frame.getContentPane().add(new XCur2().getComponent());
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.pack();
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);
  }

  public static void main(String[] args)
  {
    java.awt.EventQueue.invokeLater(new Runnable()
    {
      public void run()
      {
        createAndShowUI();
      }
    });
  }
}

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