PopupShower.java

package aima.gui.swing.framework;

import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JPopupMenu;

/**
 * Useful helper class for showing popup menus. The idea is taken from the
 * java tutorial "How to Use Menus".
 * 
 * @author Ruediger Lunde
 */
public class PopupShower extends MouseAdapter {
	JPopupMenu popup;

	public PopupShower(JPopupMenu popup) {
		this.popup = popup;
	}

	public void mousePressed(MouseEvent e) {
		maybeShowPopup(e);
	}

	public void mouseReleased(MouseEvent e) {
		maybeShowPopup(e);
	}

	private void maybeShowPopup(MouseEvent e) {
		if (e.isPopupTrigger()) {
			popup.show(e.getComponent(), e.getX(), e.getY());
		}
	}
}