Ćwiczenie 3
Dodać do programu 3 komponenty klasy JRadioButton w taki sposób, aby pozwalały one na dynamiczną zmianę stylu (LookAndFeel) okna.
Można wykorzystać fragmenty z poniższego przykładu:
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class Ch06_04 extends JFrame {
JRadioButton b1 = new JRadioButton("Metal"), b2 = new JRadioButton("Motif"), b3 = new JRadioButton("Windows");
public Ch06_04() {
super("Aplikacja Swing 2");
Container contentPane = getContentPane();
contentPane.add(new Panel(), BorderLayout.CENTER);
}
public static void main(String args[]) {
final JFrame f = new Ch06_04();
f.setBounds(100, 100, 300, 300);
f.setVisible(true);
f.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
class Panel extends JPanel implements ActionListener{
public Panel() {
add(new JButton("JButton"));
add(new JTextField("JTextField"));
add(new JCheckBox("JCheckBox"));
add(new JRadioButton("JRadioButton"));
add(new JLabel("JLabel"));
add(new JList(new String[] {"JList, poz. 1", "JList, poz. 2", "JList, poz. 3"}));
add(new JScrollBar(SwingConstants.HORIZONTAL));
ButtonGroup group = new ButtonGroup();
group.add(b1);
group.add(b2);
group.add(b3);
b1.addActionListener(this);
b2.addActionListener(this);
b3.addActionListener(this);
add(b1);
add(b2);
add(b3);
}
public void actionPerformed(ActionEvent e) {
JRadioButton src = (JRadioButton)e.getSource();
try {
if((JRadioButton)e.getSource() == b1) UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
else if((JRadioButton)e.getSource() == b2)UIManager.setLookAndFeel("com.sun.java.swing.plaf.motif.MotifLookAndFeel");
else if((JRadioButton)e.getSource() == b3)UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
} catch(Exception ex) {}
SwingUtilities.updateComponentTreeUI(getContentPane());
}
}
}
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