/*
* RolloverButton.java - Class for buttons that implement rollovers
* :tabSize=8:indentSize=8:noTabs=false:
* :folding=explicit:collapseFolds=1:
*
* Copyright (C) 2002 Kris Kopicki
* Portions copyright (C) 2003 Slava Pestov
*
* 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
package org.gjt.sp.jedit.gui;
//{{{ Imports
import java.awt.*;
import java.awt.event.*;
import java.lang.reflect.Method;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.plaf.basic.BasicButtonUI;
import org.gjt.sp.jedit.OperatingSystem;
import org.gjt.sp.util.Log;
//}}}
/**
* If you wish to have rollovers on your buttons, use this class.
*
* Unlike the Swing rollover support, this class works outside of
* <code>JToolBar</code>s, and does not require undocumented client
* property hacks or JDK1.4-specific API calls.<p>
*
* Note: You should not call <code>setBorder()</code> on your buttons,
* as they probably won't work properly.
*/
public class RolloverButton extends JButton
{
//{{{ RolloverButton constructor
/**
* Setup the border (invisible initially)
*/
public RolloverButton()
{
if(OperatingSystem.hasJava15())
setContentAreaFilled(false);
if(method != null)
{
try
{
method.invoke(this,new Boolean[] { Boolean.TRUE });
}
catch(Exception e)
{
Log.log(Log.ERROR,this,e);
}
}
else
{
addMouseListener(new MouseOverHandler());
}
} //}}}
//{{{ RolloverButton constructor
/**
* Setup the border (invisible initially)
*/
public RolloverButton(Icon icon)
{
this();
setIcon(icon);
} //}}}
//{{{ updateUI() method
public void updateUI()
{
if(OperatingSystem.isWindows())
{
/* Workaround for uncooperative Windows L&F */
setUI(new BasicButtonUI());
}
else
super.updateUI();
setBorder(new EtchedBorder());
setBorderPainted(false);
setMargin(new Insets(1,1,1,1));
setRequestFocusEnabled(false);
} //}}}
//{{{ isOpaque() method
public boolean isOpaque()
{
return false;
} //}}}
//{{{ setEnabled() method
public void setEnabled(boolean b)
{
super.setEnabled(b);
if(method == null)
{
setBorderPainted(false);
repaint();
}
} //}}}
//{{{ setBorderPainted() method
public void setBorderPainted(boolean b)
{
try
{
revalidateBlocked = true;
super.setBorderPainted(b);
}
finally
{
revalidateBlocked = false;
}
} //}}}
//{{{ revalidate() method
/**
* We block calls to revalidate() from a setBorderPainted(), for
* performance reasons.
*/
public void revalidate()
{
if(!revalidateBlocked)
super.revalidate();
} //}}}
//{{{ paint() method
public void paint(Graphics g)
{
if(method != null || isEnabled())
super.paint(g);
else
{
Graphics2D g2 = (Graphics2D)g;
g2.setComposite(c);
super.paint(g2);
}
} //}}}
//{{{ Private members
private static AlphaComposite c = AlphaComposite.getInstance(
AlphaComposite.SRC_OVER, 0.5f);
private static Method method;
private boolean revalidateBlocked;
static
{
/* if(OperatingSystem.hasJava14())
{
try
{
method = RolloverButton.class
.getMethod("setRolloverEnabled",new Class[]
{ boolean.class });
Log.log(Log.DEBUG,RolloverButton.class,
"Java 1.4 setRolloverEnabled() method enabled");
}
catch(Exception e)
{
Log.log(Log.ERROR,RolloverButton.class,e);
}
} */
} //}}}
//{{{ MouseHandler class
/**
* Make the border visible/invisible on rollovers
*/
class MouseOverHandler extends MouseAdapter
{
public void mouseEntered(MouseEvent e)
{
if (isEnabled())
setBorderPainted(true);
}
public void mouseExited(MouseEvent e)
{
setBorderPainted(false);
}
} //}}}
}