Package org.jmule.ui.swing

Source Code of org.jmule.ui.swing.JSplashLabel

/*
*  JMule - Java file sharing client
*  Copyright (C) 2007-2008 JMule team ( jmule@jmule.org / http://jmule.org )
*
*  Any parts of this program derived from the Apache Commons,
*  Phex, Zeus-jscl, AspectJ or JDIC project, or contributed
*  by third-party developers are copyrighted by their
*  respective authors.
*
*  This program is free software; you can redistribute it and/or
*  modify it under the terms of the GNU General Public License
*  as published by the Free Software Foundation; either version 2
*  of the License, or (at your option) any later version.
*
*  This program 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 General Public License for more details.
*
*  You should have received a copy of the GNU General Public License
*  along with this program; if not, write to the Free Software
*  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*
*/
package org.jmule.ui.swing;

import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.MediaTracker;
import java.net.URL;
import javax.swing.ImageIcon;
import javax.swing.JLabel;

/**
* Extends JLabel to provide support for custom text drawing inside image used
* for JSplash component.
* <p>
* @author Gregory Kotsaftis
* @version $$Revision: 1.1 $$
* Last changed by $$Author: javajox $$ on $$Date: 2008/07/31 16:43:02 $$
*/
public final class JSplashLabel extends JLabel {
   
    /**
     * Used to draw the text string.
     */
    private String m_text = null;

    /**
     * Font to use when drawing the text.
     */
    private Font m_font = null;

    /**
     * Colour to use when drawing the text.
     */
    private Color m_color = null;
   
   
    /**
     * Constructor.
     * <p>
     * @param url   The location of the image (<b>it cannot be null</b>).
     * @param s     The string to draw (can be null).
     * @param f     The font to use (can be null).
     * @param c     The color to use (can be null).
     */
    public JSplashLabel(URL url, String s, Font f, Color c)
    {
        super();
       
        ImageIcon icon = new ImageIcon( url );
        if( icon.getImageLoadStatus()!=MediaTracker.COMPLETE )
        {
            System.err.println("Cannot load splash screen: " + url);
            setText("Cannot load splash screen: " + url);
        }
        else
        {
            setIcon( icon );
            m_text = s;
            m_font = f;
            m_color = c;
           
            if( m_font!=null )
            {
                setFont( m_font );
            }
        }
    }
   

    /**
     * Overrides paint in order to draw the version number on the splash screen.
     * <p>
     * @param g     The graphics context to use.
     */
    public void paint(Graphics g)
    {
        super.paint(g);
       
        if( m_text!=null )
        {
            if( m_color!=null )
            {
                g.setColor( m_color );
            }           
           
            FontMetrics fm = g.getFontMetrics();
            int width = fm.stringWidth(m_text) + 20;
            int height = fm.getHeight();
           
            g.drawString(m_text, getWidth() - width, getHeight() - height);
        }
    }
   
}
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