Link Label
/**
* The utillib library.
* More information is available at http://www.jinchess.com/.
* Copyright (C) 2002 Alexander Maryanovsky.
* All rights reserved.
*
* The utillib library is free software; you can redistribute
* it and/or modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* The utillib library is distributed in the hope that it will
* be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
* General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with utillib library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
import java.awt.Cursor;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import javax.swing.JLabel;
/**
* An extension of JLabel which looks like a link and responds appropriately
* when clicked. Note that this class will only work with Swing 1.1.1 and later.
* Note that because of the way this class is implemented, getText() will not
* return correct values, user <code>getNormalText</code> instead.
*/
public class LinkLabel extends JLabel{
/**
* The normal text set by the user.
*/
private String text;
/**
* Creates a new LinkLabel with the given text.
*/
public LinkLabel(String text){
super(text);
setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
enableEvents(MouseEvent.MOUSE_EVENT_MASK);
}
/**
* Sets the text of the label.
*/
public void setText(String text){
super.setText("<html><font color=\"#0000CF\"><u>"+text+"</u></font></html>"); //$NON-NLS-1$ //$NON-NLS-2$
this.text = text;
}
/**
* Returns the text set by the user.
*/
public String getNormalText(){
return text;
}
/**
* Processes mouse events and responds to clicks.
*/
protected void processMouseEvent(MouseEvent evt){
super.processMouseEvent(evt);
if (evt.getID() == MouseEvent.MOUSE_CLICKED)
fireActionPerformed(new ActionEvent(this, ActionEvent.ACTION_PERFORMED, getNormalText()));
}
/**
* Adds an ActionListener to the list of listeners receiving notifications
* when the label is clicked.
*/
public void addActionListener(ActionListener listener){
listenerList.add(ActionListener.class, listener);
}
/**
* Removes the given ActionListener from the list of listeners receiving
* notifications when the label is clicked.
*/
public void removeActionListener(ActionListener listener){
listenerList.remove(ActionListener.class, listener);
}
/**
* Fires an ActionEvent to all interested listeners.
*/
protected void fireActionPerformed(ActionEvent evt){
Object [] listeners = listenerList.getListenerList();
for (int i = 0; i < listeners.length; i += 2){
if (listeners[i] == ActionListener.class){
ActionListener listener = (ActionListener)listeners[i+1];
listener.actionPerformed(evt);
}
}
}
}
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