DesktopIndicator.java
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phex.gui.common |
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Phex |
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/*
* PHEX - The pure-java Gnutella-servent.
* Copyright (C) 2001 - 2006 Phex Development Group
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* --- CVS Information ---
* $Id: DesktopIndicator.java 4227 2008-07-13 10:24:03Z gregork $
*/
package phex.gui.common;
import java.util.ArrayList;
import java.util.Iterator;
import phex.gui.actions.ExitPhexAction;
import phex.utils.Localizer;
/**
* A JNI wrapper for desktop indicators (also called tray icons and taskbar icons).
* <br><br>
*
* The actual implementation is platform specific. Currently only Win32 is supported.
* For unsupported platforms, the desktop indicator doesn't do anything, and is
* otherwise harmless. Likewise, some platforms may not support the tooltip
* feature.
* <br><br>
*
* IMPORTANT!
* <br><br>
*
* Relying on this feature will make your applet or application platform-
* dependant. If possible, treat is as an "added benefit", not a required feature.
**/
public class DesktopIndicator
{
private static boolean isNativeLibLoaded;
/**
* Loads the JNI library, if available.
* <br><br>
* Must be called before images are loaded and instances are created.
**/
static
{
// Assume everything works
isNativeLibLoaded = true;
// Load JNI library
try
{
System.loadLibrary( "Phex" );
}
catch( UnsatisfiedLinkError x )
{
// we failed, so unset success flag
isNativeLibLoaded = false;
}
}
private int image;
private String tooltip;
private final ArrayList listeners = new ArrayList();
/**
* Native handler field. Even though it appears to be unused, don't delete!
*/
private int handler = 0;
/**
* Creates a desktop indicator, initially hidden.
* <br><br>
* The image handle is the return value of a previous call to loadImage.
* @exception UnsupportedOperationException is thrown when library cant
* be initialized.
**/
public DesktopIndicator()
throws UnsupportedOperationException
{
if ( !isNativeLibLoaded )
{
throw new UnsupportedOperationException( "Cant load Phex.dll" );
}
image = nativeLoadImageIDStrFromResource( "Phex" );
tooltip = Localizer.getString( "TTTSysTray" );
// show and hide once to make it go faster when done the first time.
showIndicator();
hideIndicator();
}
/**
* Frees memory used by a image previously loaded with loadImage.
* <br><br>
*
* The memory is freed in any case when the VM is closed.
**/
public static void freeImage( int image )
{
try
{
nativeFreeImage( image );
}
catch( UnsatisfiedLinkError x )
{
}
}
/**
* Loads an image file to memory.
* <br><br>
*
* The image is loaded from the filename parameter, while the tooltip is
* supplied in the tooltip parameter. The image file must be in a format
* recognized by the native platform (for example, a .ico file for Win32).
* <br><br>
*
* A return value of -1 indicates failure. Otherwise, it is the handle of
* the image to be used for desktop indicators.
**/
public static int loadImage( String filename )
{
try
{
return nativeLoadImage( filename );
}
catch( UnsatisfiedLinkError x )
{
return -1;
}
}
/**
* Enables the desktop indicator.
* <br><br>
*
* If the indicator is already active, it is "refreshed" with the filename and tooltip.
**/
public void showIndicator()
{
setNativeMenuText( Localizer.getString( "OpenPhex" ),
Localizer.getString( "ExitPhex" ) );
nativeEnable( image, tooltip );
}
/**
* Hides the desktop indicator.
**/
public void hideIndicator()
{
nativeHide();
}
/**
* Makes sure that the desktop indicator is hidden before calling.
**/
public void removeIndicator()
{
nativeDisable();
}
/**
* Updates the desktop indicator with an image and tooltip.
**/
public void update( int image, String tooltip )
{
this.image = image;
this.tooltip = tooltip;
try
{
nativeEnable( image, tooltip );
}
catch( UnsatisfiedLinkError x )
{
}
}
///////////////////// START native methods ////////////////////////
private synchronized native void setNativeMenuText( String openStr, String exitStr )
throws UnsatisfiedLinkError;
private synchronized native void nativeEnable( int image, String tooltip )
throws UnsatisfiedLinkError;
private synchronized native void nativeHide()
throws UnsatisfiedLinkError;
private synchronized native void nativeDisable()
throws UnsatisfiedLinkError;
private synchronized static native int nativeLoadImage( String filename )
throws UnsatisfiedLinkError;
private synchronized static native void nativeFreeImage( int image )
throws UnsatisfiedLinkError;
private synchronized static native int nativeLoadImageIDFromResource( int inResource )
throws UnsatisfiedLinkError;
private synchronized static native int nativeLoadImageIDStrFromResource( String inResource )
throws UnsatisfiedLinkError;
///////////////////// END native methods ////////////////////////
///////////////////// START event handling methods ////////////////////////
/**
* Adds a listener for clicks.
**/
public void addDesktopIndicatorListener( DesktopIndicatorListener listener )
{
listeners.add( listener );
}
/**
* Removes a listener for clicks.
**/
public void removeDesktopIndicatorListener( DesktopIndicatorListener listener )
{
listeners.remove( listener );
}
/**
* Notifies all listeners that the desktop indicator was clicked.
**/
public void fireClicked()
{
DesktopIndicatorListener listener;
Iterator iterator = listeners.iterator();
while( iterator.hasNext() )
{
listener = (DesktopIndicatorListener) iterator.next();
listener.onDesktopIndicatorClicked( this );
}
}
/**
* Notifies all listeners that the application was closed
**/
public void exitApplication()
{
// Set a valid ClassLoader. Since we experience troubles
// with class loader when in Thread comming from native (using JAXBContext)
// we make sure here that there is a valid class loader.
if ( Thread.currentThread().getContextClassLoader() == null )
{
Thread.currentThread().setContextClassLoader(
ClassLoader.getSystemClassLoader());
}
ExitPhexAction.shutdown();
}
///////////////////// END event handling methods ////////////////////////
}
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