GroupLayout Demo

Wir werden mittels GroupLayout in Verbindung mit GridLayout und BorderLayout 3 verschiedene Login-Dialoge erzeugen.

<code=java> import java.awt.*; import javax.swing.*;

public class GroupLayoutTest {

   public static void main(String[] args) {
       int n = 0;
       showFrame(setSingleGroupLayout(new JFrame("Group Layout Test")), n++);
       showFrame(setSingleGroupLayoutButtonsSeparated(new JFrame("Group Layout Test")), n++);
       showFrame(setMixedLayout(new JFrame("Group Layout Test")), n++);
   }

   private static void showFrame(JFrame jFrame, int n) {
       jFrame.pack();
       jFrame.setLocation(n * 200, n * 150);
       jFrame.setVisible(true);
   }

   private static JFrame setSingleGroupLayout(JFrame jFrame) {
       JPanel jPanel = new JPanel();
       GroupLayout groupLayout = new GroupLayout(jPanel);
       groupLayout.setAutoCreateGaps(true);
       groupLayout.setAutoCreateContainerGaps(true);
       jPanel.setLayout(groupLayout);

       JLabel nameLable = new JLabel("Name:");
       JTextField nameInput = new JTextField(30);
       JLabel passLable = new JLabel("Passwort:");
       JTextField pasInput = new JPasswordField(20);
       JButton loginButton = new JButton("login");
       JButton cancelButton = new JButton("cancel");

       groupLayout.setHorizontalGroup(groupLayout
               .createSequentialGroup()
               .addGroup(
                       groupLayout.createParallelGroup().addComponent(nameLable).addComponent(passLable)
                               .addComponent(loginButton))
               .addGroup(
                       groupLayout.createParallelGroup().addComponent(nameInput).addComponent(pasInput)
                               .addComponent(cancelButton)));

       groupLayout.setVerticalGroup(groupLayout.createSequentialGroup()
               .addGroup(groupLayout.createParallelGroup().addComponent(nameLable).addComponent(nameInput))
               .addGroup(groupLayout.createParallelGroup().addComponent(passLable).addComponent(pasInput))
               .addGroup(groupLayout.createParallelGroup().addComponent(loginButton).addComponent(cancelButton)));

       jFrame.add(jPanel);
       return jFrame;
   }

   private static JFrame setSingleGroupLayoutButtonsSeparated(JFrame jFrame) {
       JPanel jPanel = new JPanel();
       GroupLayout groupLayout = new GroupLayout(jPanel);
       groupLayout.setAutoCreateGaps(true);
       groupLayout.setAutoCreateContainerGaps(true);
       jPanel.setLayout(groupLayout);

       JLabel nameLable = new JLabel("Name:");
       JTextField nameInput = new JTextField(30);
       JLabel passLable = new JLabel("Passwort:");
       JTextField pasInput = new JPasswordField(20);
       JButton loginButton = new JButton("login");
       JButton cancelButton = new JButton("cancel");

       JPanel buttonGroup = new JPanel(new GridLayout(1, 0, 5, 5));
       buttonGroup.add(loginButton);
       buttonGroup.add(cancelButton);

       constructGroupLayout(groupLayout, nameLable, nameInput, passLable, pasInput, buttonGroup);

       jFrame.add(jPanel);
       return jFrame;
   }

   private static void constructGroupLayout(GroupLayout groupLayout, JLabel nameLable, JTextField nameInput,
           JLabel passLable, JTextField pasInput, JPanel buttonGroup) {
       groupLayout.setHorizontalGroup(groupLayout
               .createSequentialGroup()
               .addGroup(groupLayout.createParallelGroup().addComponent(nameLable).addComponent(passLable).addGap(0))
               .addGroup(
                       groupLayout.createParallelGroup().addComponent(nameInput).addComponent(pasInput)
                               .addComponent(buttonGroup)));

       groupLayout.setVerticalGroup(groupLayout.createSequentialGroup()
               .addGroup(groupLayout.createParallelGroup().addComponent(nameLable).addComponent(nameInput))
               .addGroup(groupLayout.createParallelGroup().addComponent(passLable).addComponent(pasInput))
               .addGroup(groupLayout.createParallelGroup().addGap(0).addComponent(buttonGroup)));
   }

   private static JFrame setMixedLayout(JFrame jFrame) {
       JPanel jPanel = new JPanel();
       GroupLayout groupLayout = new GroupLayout(jPanel);
       groupLayout.setAutoCreateGaps(true);
       groupLayout.setAutoCreateContainerGaps(true);
       jPanel.setLayout(groupLayout);

       JLabel nameLable = new JLabel("Name:");
       JTextField nameInput = new JTextField(30);
       JLabel passLable = new JLabel("Passwort:");
       JTextField pasInput = new JPasswordField(20);
       JButton loginButton = new JButton("login");
       JButton cancelButton = new JButton("cancel");

       JPanel buttonGroup = new JPanel(new GridLayout(1, 0, 5, 5));
       buttonGroup.add(loginButton);
       buttonGroup.add(cancelButton);
       JPanel bottomPanel = new JPanel(new BorderLayout());
       bottomPanel.add(buttonGroup, BorderLayout.EAST);
       jFrame.add(bottomPanel, BorderLayout.SOUTH);

       constructGroupLayout(groupLayout, nameLable, nameInput, passLable, pasInput, bottomPanel);

       jFrame.add(jPanel);
       return jFrame;
   }

} </code=java>