org.apache.cayenne.swing.control.ActionLink Maven / Gradle / Ivy
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* https://www.apache.org/licenses/LICENSE-2.0
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package org.apache.cayenne.swing.control;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JLabel;
/**
* A label that works like an HTML hyperlink, generating ActionEvents on click.
*
*/
public class ActionLink extends JLabel {
static final Color LINK_FONT_COLOR = Color.BLUE;
static final Color LINK_MOUSEOVER_FONT_COLOR = Color.RED;
public ActionLink(String text) {
super(text);
// due to this bug (that is marked as fixed, but stil doesn't work on JDK
// 1.4.2), we can't build underlined font:
// http://bugs.sun.com/bugdatabase/view_bug.do;:YfiG?bug_id=4296952
setForeground(LINK_FONT_COLOR);
addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
fireActionPerformed();
}
public void mouseEntered(MouseEvent e) {
setForeground(LINK_MOUSEOVER_FONT_COLOR);
}
public void mouseExited(MouseEvent e) {
setForeground(LINK_FONT_COLOR);
}
});
}
protected void fireActionPerformed() {
Object[] listeners = listenerList.getListenerList();
ActionEvent e = null;
for (int i = listeners.length - 2; i >= 0; i -= 2) {
if (listeners[i] == ActionListener.class) {
if (e == null) {
e = new ActionEvent(this, ActionEvent.ACTION_PERFORMED, null);
}
((ActionListener) listeners[i + 1]).actionPerformed(e);
}
}
}
public void addActionListener(ActionListener l) {
listenerList.add(ActionListener.class, l);
}
public void removeActionListener(ActionListener l) {
listenerList.remove(ActionListener.class, l);
}
}