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import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JMenuItem;
import javax.swing.JPopupMenu;
public class PopUpColorMenu implements ActionListener {
Component selectedComponent;
public PopUpColorMenu() {
JFrame frame = new JFrame();
final JPopupMenu colorMenu = new JPopupMenu("Color");
colorMenu.add(makeMenuItem("Red"));
colorMenu.add(makeMenuItem("Green"));
colorMenu.add(makeMenuItem("Blue"));
MouseListener mouseListener = new MouseAdapter() {
public void mousePressed(MouseEvent e) {
checkPopup(e);
}
public void mouseClicked(MouseEvent e) {
checkPopup(e);
}
public void mouseReleased(MouseEvent e) {
checkPopup(e);
}
private void checkPopup(MouseEvent e) {
if (e.isPopupTrigger()) {
selectedComponent = e.getComponent();
colorMenu.show(e.getComponent(), e.getX(), e.getY());
}
}
};
frame.setLayout(new FlowLayout());
JButton button = new JButton("Uno");
button.addMouseListener(mouseListener);
frame.add(button);
button = new JButton("Due");
button.addMouseListener(mouseListener);
frame.add(button);
button = new JButton("Tre");
button.addMouseListener(mouseListener);
frame.add(button);
frame.getContentPane().addMouseListener(mouseListener);
frame.setSize(200, 50);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
public void actionPerformed(ActionEvent e) {
String color = e.getActionCommand();
if (color.equals("Red"))
selectedComponent.setBackground(Color.red);
else if (color.equals("Green"))
selectedComponent.setBackground(Color.green);
else if (color.equals("Blue"))
selectedComponent.setBackground(Color.blue);
}
private JMenuItem makeMenuItem(String label) {
JMenuItem item = new JMenuItem(label);
item.addActionListener(this);
return item;
}
public static void main(String[] args) {
new PopUpColorMenu();
}
}
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