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| import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class Exemple extends JFrame {
public static void main(final String[] pArgs) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new Exemple().setVisible(true);
}
});
}
public Exemple() {
super("Exemple");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// Le fond bleu
final JPanel lBackground = new JPanel(new FlowLayout(FlowLayout.CENTER, 20, 20));
lBackground.setOpaque(true);
lBackground.setBackground(Color.BLUE);
setContentPane(lBackground);
// Le parent rouge translucide
final JPanel lParent = new JPanel(new FlowLayout(FlowLayout.CENTER, 20, 20));
lParent.setOpaque(true);
lParent.setBackground(new Color(128, 0, 0, 64));
getContentPane().add(lParent);
// Le composant sur fond translucide
final JPanel lComponent = new JPanel() {
@Override
public void paintComponent(final Graphics pGraph) {
pGraph.setColor(getForeground());
pGraph.fillOval(10, 10, 180, 180);
}
};
lComponent.addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(final MouseEvent pE) {
lComponent.setForeground(Color.GREEN);
}
@Override
public void mouseExited(final MouseEvent pE) {
lComponent.setForeground(Color.PINK);
}
});
lComponent.setOpaque(false);
lComponent.setPreferredSize(new Dimension(200, 200));
lParent.add(lComponent);
// Le composant sur fond non translucide
final JPanel lComponent2 = new JPanel() {
@Override
public void paintComponent(final Graphics pGraph) {
pGraph.setColor(getForeground());
pGraph.fillOval(10, 10, 180, 180);
}
};
lComponent2.addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(final MouseEvent pE) {
lComponent2.setForeground(Color.GREEN);
}
@Override
public void mouseExited(final MouseEvent pE) {
lComponent2.setForeground(Color.PINK);
}
});
lComponent2.setOpaque(false);
lComponent2.setPreferredSize(new Dimension(200, 200));
lBackground.add(lComponent2);
pack();
setLocationRelativeTo(null);
}
} |
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