windowstrayicon.java

JAVA程序的系统托盘

// This happens when C++ is out of memory
	public static final int NOTENOUGHMEM = -3;

// Each icon has one unique id number
	public static final int WRONGICONID = -4;

// The native code can't locate the DLL
// Try moving it to C:/WINDOWS/SYSTEM or something like that
	public static final int DLLNOTFOUND = -5;

// Invocation code can't find your Java VM during callback
	public static final int NOVMS = -6;

// Invocation API can't attach native thread to your Java VM
	public static final int ERRTHREAD = -7;

// Error in lookup of the notifyListeners() method in this class
// The DLL has to do this when the user clicks one of your icons
	public static final int METHODID = -8;

// Not really an error..
// This happens when the user clicks an icon that has no ActionListener yet
	public static final int NOLISTENER = -9;

// One of the Invocation JNI Functions returned an error
	public static final int JNIERR = -10;

/****************************************************************************************************************
 *                                                                                                              *
 * Windows messaging code for detecting previous instance                                                       *
 *                                                                                                              *
 ****************************************************************************************************************/

/**
 * Checks if there's an instance with hidden window title = appName running
 * Can be used to detect that another instance of your app is already running (so exit..)
 *
 * Param appName = the title of the hidden window to search for
 */
	public static native boolean isRunning(String appName);

/**
 * Send a message to another app (message can contain an integer)
 * Can be used to detect that another instance of your app is already running
 * That instance can for example restore it's window after it receives the windows
 * message - see demo app for more info
 *
 * Param appName = the title of the hidden window to search for
 * Param message = the integer message to send (only native int size supported)
 */
	public static native int sendWindowsMessage(String appName, int message);

/**
 * Set callback method for receiving windows messages
 * See sendWindowsMessage() for more information or take a look at the demo app
 *
 * Param callback = the callback method for this app
 */
	public static void setWindowsMessageCallback(TrayIconCallback callback) {
		mWindowsMessageCallback = callback;
	}

/****************************************************************************************************************
 *                                                                                                              *
 * Next section is for inter use only -- or for hackers :O)                                                     *
 *                                                                                                              *
 ****************************************************************************************************************/

// Each icon has a unique id ranging from 0..99
	private int my_id;
// Each icon can have a popup menu - activated when user right clicks the icon
	private TrayIconPopup mPopup;
// Each icon can have any number of ActionListeners - notified when user clicks (left/right) the icon
	private Vector listeners;
// Each application can have one WindowsMessageCallback - notified when another app uses sendWindowsMessage
	private static TrayIconCallback mWindowsMessageCallback;

/**
 * Private method called by native library when user clicks mouse button
 *
 * Param button = "Left" or "Right"
 */
	private void notifyMouseListeners(int button) {
		if (listeners != null) {
			ActionEvent evt = null;
			if (button == 0) evt = new ActionEvent(this,0,"Left");
			else evt = new ActionEvent(this,0,"Right");
			for (Enumeration enum = listeners.elements(); enum.hasMoreElements(); ) {
				ActionListener listener = (ActionListener)enum.nextElement();
				listener.actionPerformed(evt);
			}
		}
	}

/**
 * Private method called by native library when user selects popup menu item
 *
 * Param id = id of menu item (each menu item has unique id)
 */
	private void notifyMenuListeners(int id) {
		if (mPopup != null) mPopup.onSelected(id);
	}

/**
 * Private method called by native library when it receives a sendWindowsMessage event
 * See sendWindowsMessage() for more information or take a look at the demo app
 *
 * Param lParam = parameter send along with windows message
 */
	private static int callWindowsMessage(int lParam) {
		if (mWindowsMessageCallback != null) return mWindowsMessageCallback.callback(lParam);
		else return 0;
	}

/**
 * Set check mark for TrayIconPopupCheckItem
 * Used by TrayIconPopupCheckItem.setCheck()
 *
 * Param menuId = the id of the menu item
 * Param selected = true if check mark
 */
	void checkPopup(int menuId, boolean selected) {
		checkPopup(my_id, menuId, selected);
	}

/**
 * Init new popup menu - used by setPopup()
 *
 * Param id = the icon's id
 * Param nblevels = the submenu depth of the new popup
 */
	static native void initPopup(int id, int nblevels);

// Constants for builing a popup menu
// Used by subclasses of TrayIconPopupItem
	final static int POPUP_TYPE_ITEM        = 0;	// Simple item
	final static int POPUP_TYPE_SEPARATOR   = 1;	// Separator
	final static int POPUP_TYPE_CHECKBOX    = 2;	// Checkbox item
	final static int POPUP_TYPE_INIT_LEVEL  = 3;	// First item of submenu
	final static int POPUP_TYPE_DONE_LEVEL  = 4;	// Last item of submenu

/**
 * Add popup menu item - used by setTrayIcon() in subclasses of TrayIconPopupItem
 *
 * Param id = the icon's id
 * Param level = the submenu level
 * Param name = the name of the menu item
 * Param type = POPUP_TYPE_ITEM or POPUP_TYPE_SEPARATOR or..
 */
	static native int subPopup(int id, int level, String name, int type);

/**
 * Set check mark for TrayIconPopupCheckItem
 * Used by checkPopup(int menuId, boolean selected)
 *
 * Param id = the icon's id
 * Param menuId = the id of the menu item
 * Param selected = true if check mark
 */
	private static native void checkPopup(int id, int menuId, boolean selected);

/**
 * Allocate a new id for icon - used in constructor
 */
	private static native int getFreeId();

/**
 * Set bitmap data for icon - used in constructor and setImage()
 *
 * Param id = the icon's id
 * Param w, h = the images size
 * Param pixels = the pixel array
 */
	private static native void setIconData(int id, int w, int h, int pixels[]);

/**
 * Make Tray Icon visible/invisible - used by setVisible()
 *
 * Param id = the icon's id
 * Param hide = visible/invisible?
 */
	private static native void showIcon(int id, boolean hide);

/**
 * Test if Tray Icon is in the system tray - used by isVisible()
 *
 * Param id = the icon's id
 */
	private static native int testVisible(int id);

/**
 * Enable mouse/menu messages for icon - used by addActionListener() and setPopup()
 *
 * Param ico = the icons class (this)
 * Param id = the icon's id
 * Param enable = enable/disable mouse events?
 */
	private static native void clickEnable(WindowsTrayIcon ico, int id, boolean enable);

/**
 * Set tooltip - used by setToolTip(String tip)
 *
 * Param id = the icon's id
 * Param tip = the new tooltip
 */
	private static native void setToolTip(int id, String tip);

/**
 * Free all native resources for this icon - used by freeIcon()
 *
 * Param id = the icon's id
 */
	private static native void freeIcon(int id);
	
	private static native void detectAllClicks(int id);
	
/**
 * Get coordinates of last mouse click 
 */
	private static native int getMouseX();
	private static native int getMouseY();
	
/**
 * Keep TrayIcon alive
 */
    public static void keepAlive() {
        if (m_Keeper == null) {
            m_Keeper = new TrayIconKeeper();
            m_Keeper.start();
        }
    } 	

	// Init the native library
	static {
		boolean ok = false;
		String version = System.getProperty("java.version");
		if (version.length() >= 3) {
			String v1 = version.substring(0,3);
			if (v1.equals("1.1")) {
				System.loadLibrary("TrayIcon11");
				ok = true;
			}
			if (v1.equals("1.2") || v1.equals("1.3") || v1.equals("1.4")) {
				System.loadLibrary("TrayIcon12");
				ok = true;
			}
		}
		if (!ok) {
			System.out.println("Wrong Java VM version: "+version);
			System.exit(-1);
		}
	}
}