bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/TrayItem.java - platform/eclipse.platform.swt - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2008 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.swt.widgets;

 import org.eclipse.swt.*;
 import org.eclipse.swt.events.*;
 import org.eclipse.swt.graphics.*;
 import org.eclipse.swt.internal.*;
 import org.eclipse.swt.internal.gtk.*;

 /**
  * Instances of this class represent icons that can be placed on the
  * system tray or task bar status area.
  * <p>
  * <dl>
  * <dt><b>Styles:</b></dt>
  * <dd>(none)</dd>
  * <dt><b>Events:</b></dt>
  * <dd>DefaultSelection, MenuDetect, Selection</dd>
  * </dl>
  * </p><p>
  * IMPORTANT: This class is <em>not</em> intended to be subclassed.
  * </p>
  *
  * @see <a href="http://www.eclipse.org/swt/snippets/#tray">Tray, TrayItem snippets</a>
  * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
  *
  * @since 3.0
  * @noextend This class is not intended to be subclassed by clients.
  */
 public class TrayItem extends Item {
 	Tray parent;
 	ToolTip toolTip;
 	String toolTipText;
 	int /*long*/ imageHandle;
 	int /*long*/ tooltipsHandle;
 	ImageList imageList;

 /**
  * Constructs a new instance of this class given its parent
  * (which must be a <code>Tray</code>) and a style value
  * describing its behavior and appearance. The item is added
  * to the end of the items maintained by its parent.
  * <p>
  * The style value is either one of the style constants defined in
  * class <code>SWT</code> which is applicable to instances of this
  * class, or must be built by <em>bitwise OR</em>'ing together
  * (that is, using the <code>int</code> "|" operator) two or more
  * of those <code>SWT</code> style constants. The class description
  * lists the style constants that are applicable to the class.
  * Style bits are also inherited from superclasses.
  * </p>
  *
  * @param parent a composite control which will be the parent of the new instance (cannot be null)
  * @param style the style of control to construct
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
  * </ul>
  * @exception SWTException <ul>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
  *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
  * </ul>
  *
  * @see SWT
  * @see Widget#checkSubclass
  * @see Widget#getStyle
  */
 public TrayItem (Tray parent, int style) {
 	super (parent, style);
 	this.parent = parent;
 	createWidget (parent.getItemCount ());
 }

 /**
  * Adds the listener to the collection of listeners who will
  * be notified when the platform-specific context menu trigger
  * has occurred, by sending it one of the messages defined in
  * the <code>MenuDetectListener</code> interface.
  *
  * @param listener the listener which should be notified
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
  * </ul>
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  *
  * @see MenuDetectListener
  * @see #removeMenuDetectListener
  *
  * @since 3.3
  */
 public void addMenuDetectListener (MenuDetectListener listener) {
 	checkWidget ();
 	if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
 	TypedListener typedListener = new TypedListener (listener);
 	addListener (SWT.MenuDetect, typedListener);
 }

 /**
  * Adds the listener to the collection of listeners who will
  * be notified when the receiver is selected by the user, by sending
  * it one of the messages defined in the <code>SelectionListener</code>
  * interface.
  * <p>
  * <code>widgetSelected</code> is called when the receiver is selected
  * <code>widgetDefaultSelected</code> is called when the receiver is double-clicked
  * </p>
  *
  * @param listener the listener which should be notified when the receiver is selected by the user
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
  * </ul>
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  *
  * @see SelectionListener
  * @see #removeSelectionListener
  * @see SelectionEvent
  */
 public void addSelectionListener(SelectionListener listener) {
 	checkWidget ();
 	if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
 	TypedListener typedListener = new TypedListener (listener);
 	addListener (SWT.Selection, typedListener);
 	addListener (SWT.DefaultSelection, typedListener);
 }

 protected void checkSubclass () {
 	if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS);
 }

 void createWidget (int index) {
 	super.createWidget (index);
 	parent.createItem (this, index);
 }

 void createHandle (int index) {
 	state |= HANDLE;
 	if (OS.GTK_VERSION >= OS.VERSION (2, 10, 0)) {
 		handle = OS.gtk_status_icon_new ();
 		if (handle == 0) error (SWT.ERROR_NO_HANDLES);
 		imageHandle = OS.gtk_image_new ();
 		OS.gtk_status_icon_set_visible (handle,true);
 	} else {
 		handle = OS.gtk_plug_new (0);
 		if (handle == 0) error (SWT.ERROR_NO_HANDLES);
 		imageHandle = OS.gtk_image_new ();
 		if (imageHandle == 0) error (SWT.ERROR_NO_HANDLES);
 		OS.gtk_container_add (handle, imageHandle);
 		OS.gtk_widget_show (handle);
 		OS.gtk_widget_show (imageHandle);
 		int /*long*/ id = OS.gtk_plug_get_id (handle);
 		int monitor = 0;
 		int /*long*/ screen = OS.gdk_screen_get_default ();
 		if (screen != 0) {
 			monitor = OS.gdk_screen_get_number (screen);
 		}
 		byte [] trayBuffer = Converter.wcsToMbcs (null, "_NET_SYSTEM_TRAY_S" + monitor, true);
 		int /*long*/ trayAtom = OS.gdk_atom_intern (trayBuffer, true);
 		int /*long*/ xTrayAtom = OS.gdk_x11_atom_to_xatom (trayAtom);
 		int /*long*/ xDisplay = OS.GDK_DISPLAY ();
 		int /*long*/ trayWindow = OS.XGetSelectionOwner (xDisplay, xTrayAtom);
 		byte [] messageBuffer = Converter.wcsToMbcs (null, "_NET_SYSTEM_TRAY_OPCODE", true);
 		int /*long*/ messageAtom = OS.gdk_atom_intern (messageBuffer, true);
 		int /*long*/ xMessageAtom = OS.gdk_x11_atom_to_xatom (messageAtom);
 		XClientMessageEvent event = new XClientMessageEvent ();
 		event.type = OS.ClientMessage;
 		event.window = trayWindow;
 		event.message_type = xMessageAtom;
 		event.format = 32;
 		event.data [0] = OS.GDK_CURRENT_TIME;
 		event.data [1] = OS.SYSTEM_TRAY_REQUEST_DOCK;
 		event.data [2] = id;
 		int /*long*/ clientEvent = OS.g_malloc (XClientMessageEvent.sizeof);
 		OS.memmove (clientEvent, event, XClientMessageEvent.sizeof);
 		OS.XSendEvent (xDisplay, trayWindow, false, OS.NoEventMask, clientEvent);
 		OS.g_free (clientEvent);
 	}
 }

 void deregister () {
 	super.deregister ();
 	display.removeWidget (imageHandle);
 }

 void destroyWidget () {
 	parent.destroyItem (this);
 	releaseHandle ();
 }

 /**
  * Returns the receiver's parent, which must be a <code>Tray</code>.
  *
  * @return the receiver's parent
  *
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  *
  * @since 3.2
  */
 public Tray getParent () {
 	checkWidget ();
 	return parent;
 }

 /**
  * Returns the receiver's tool tip, or null if it has
  * not been set.
  *
  * @return the receiver's tool tip text
  *
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  *
  * @since 3.2
  */
 public ToolTip getToolTip () {
 	checkWidget ();
 	return toolTip;
 }

 /**
  * Returns the receiver's tool tip text, or null if it has
  * not been set.
  *
  * @return the receiver's tool tip text
  *
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  */
 public String getToolTipText () {
 	checkWidget ();
 	return toolTipText;
 }

 int /*long*/ gtk_activate (int /*long*/ widget) {
 	postEvent (SWT.Selection);
 	/*
 	* Feature in GTK. GTK will generate a single-click event before sending
 	* a double-click event. To know when to send a DefaultSelection, look for
 	* the single-click as the current event and for the double-click in the
 	* event queue.
 	*/
 	int /*long*/ nextEvent = OS.gdk_event_peek ();
 	if (nextEvent != 0) {
 		int nextEventType = OS.GDK_EVENT_TYPE (nextEvent);
 		int /*long*/ currEvent = OS.gtk_get_current_event ();
 		int currEventType = 0;
 		if (currEvent != 0) {
 			currEventType = OS.GDK_EVENT_TYPE (currEvent);
 			OS.gdk_event_free (currEvent);
 		}
 		OS.gdk_event_free (nextEvent);
 		if (currEventType == OS.GDK_BUTTON_PRESS && nextEventType == OS.GDK_2BUTTON_PRESS) {
 			postEvent (SWT.DefaultSelection);
 		}
 	}
 	return 0;
 }

 int /*long*/ gtk_button_press_event (int /*long*/ widget, int /*long*/ eventPtr) {
 	GdkEventButton gdkEvent = new GdkEventButton ();
 	OS.memmove (gdkEvent, eventPtr, GdkEventButton.sizeof);
 	if (gdkEvent.type == OS.GDK_3BUTTON_PRESS) return 0;
 	if (gdkEvent.button == 3 && gdkEvent.type == OS.GDK_BUTTON_PRESS) {
 		sendEvent (SWT.MenuDetect);
 		return 0;
 	}
 	if (gdkEvent.type == OS.GDK_2BUTTON_PRESS) {
 		postEvent (SWT.DefaultSelection);
 	} else {
 		postEvent (SWT.Selection);
 	}
 	return 0;
 }

 int /*long*/ gtk_size_allocate (int /*long*/ widget, int /*long*/ allocation) {
 	if (image != null && image.mask != 0) {
 		if (OS.gdk_drawable_get_depth (image.mask) == 1) {
 			int xoffset = (int) Math.floor (OS.GTK_WIDGET_X (widget) + ((OS.GTK_WIDGET_WIDTH (widget) - OS.GTK_WIDGET_REQUISITION_WIDTH (widget)) * 0.5) + 0.5);
 			int yoffset = (int) Math.floor (OS.GTK_WIDGET_Y (widget) + ((OS.GTK_WIDGET_HEIGHT (widget) - OS.GTK_WIDGET_REQUISITION_HEIGHT (widget)) * 0.5) + 0.5);
 			Rectangle b = image.getBounds();
 			int /*long*/ gdkImagePtr = OS.gdk_drawable_get_image (image.mask, 0, 0, b.width, b.height);
 			if (gdkImagePtr == 0) SWT.error(SWT.ERROR_NO_HANDLES);
 			GdkImage gdkImage = new GdkImage();
 			OS.memmove (gdkImage, gdkImagePtr);
 			byte[] maskData = new byte [gdkImage.bpl * gdkImage.height];
 			OS.memmove (maskData, gdkImage.mem, maskData.length);
 			OS.g_object_unref (gdkImagePtr);
 			Region region = new Region (display);
 			for (int y = 0; y < b.height; y++) {
 				for (int x = 0; x < b.width; x++) {
 					int index = (y * gdkImage.bpl) + (x >> 3);
 					int theByte = maskData [index] & 0xFF;
 					int mask = 1 << (x & 0x7);
 					if ((theByte & mask) != 0) {
 						region.add (xoffset + x, yoffset + y, 1, 1);
 					}
 				}
 			}
 			OS.gtk_widget_realize (handle);
 			int /*long*/ window = OS.GTK_WIDGET_WINDOW (handle);
 			OS.gdk_window_shape_combine_region (window, region.handle, 0, 0);
 			region.dispose ();
 		}
 	}
 	return 0;
 }

 int /*long*/ gtk_status_icon_popup_menu (int /*long*/ widget, int /*long*/ button, int /*long*/ activate_time) {
 	sendEvent (SWT.MenuDetect);
 	return 0;
 }

 void hookEvents () {
 	if (OS.GTK_VERSION >= OS.VERSION (2, 10, 0)) {
 		OS.g_signal_connect_closure (handle, OS.activate, display.closures [ACTIVATE], false);
 		OS.g_signal_connect_closure (handle, OS.popup_menu, display.closures [STATUS_ICON_POPUP_MENU], false);
 	} else {
 		int eventMask = OS.GDK_BUTTON_PRESS_MASK;
 		OS.gtk_widget_add_events (handle, eventMask);
 		OS.g_signal_connect_closure_by_id (handle, display.signalIds [BUTTON_PRESS_EVENT], 0, display.closures [BUTTON_PRESS_EVENT], false);
 		OS.g_signal_connect_closure_by_id (imageHandle, display.signalIds [SIZE_ALLOCATE], 0, display.closures [SIZE_ALLOCATE], false);
 	}
 }

 /**
  * Returns <code>true</code> if the receiver is visible and
  * <code>false</code> otherwise.
  *
  * @return the receiver's visibility
  *
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  */
 public boolean getVisible () {
 	checkWidget ();
 	if (OS.GTK_VERSION >= OS.VERSION (2, 10, 0)) {
 		return OS.gtk_status_icon_get_visible (handle);
 	}
 	return OS.GTK_WIDGET_VISIBLE (handle);
 }

 void register () {
 	super.register ();
 	display.addWidget (imageHandle, this);
 }

 void releaseHandle () {
 	if (handle != 0) {
 		if (OS.GTK_VERSION >= OS.VERSION (2, 10, 0)) {
 			OS.g_object_unref (handle);
 		} else {
 			OS.gtk_widget_destroy (handle);
 		}
 	}
 	handle = imageHandle = 0;
 	super.releaseHandle ();
 	parent = null;
 }

 void releaseWidget () {
 	super.releaseWidget ();
 	if (tooltipsHandle != 0) OS.g_object_unref (tooltipsHandle);
 	tooltipsHandle = 0;
 	if (imageList != null) imageList.dispose ();
 	imageList = null;
 	toolTipText = null;
 }

 /**
  * Removes the listener from the collection of listeners who will
  * be notified when the platform-specific context menu trigger has
  * occurred.
  *
  * @param listener the listener which should no longer be notified
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
  * </ul>
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  *
  * @see MenuDetectListener
  * @see #addMenuDetectListener
  *
  * @since 3.3
  */
 public void removeMenuDetectListener (MenuDetectListener listener) {
 	checkWidget ();
 	if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
 	if (eventTable == null) return;
 	eventTable.unhook (SWT.MenuDetect, listener);
 }

 /**
  * Removes the listener from the collection of listeners who will
  * be notified when the receiver is selected by the user.
  *
  * @param listener the listener which should no longer be notified
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
  * </ul>
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  *
  * @see SelectionListener
  * @see #addSelectionListener
  */
 public void removeSelectionListener (SelectionListener listener) {
 	checkWidget ();
 	if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
 	if (eventTable == null) return;
 	eventTable.unhook (SWT.Selection, listener);
 	eventTable.unhook (SWT.DefaultSelection, listener);
 }

 /**
  * Sets the receiver's image.
  *
  * @param image the new image
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li>
  * </ul>
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  */
 public void setImage (Image image) {
 	checkWidget ();
 	if (image != null && image.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
 	this.image = image;
 	if (image != null) {
 		if (imageList == null) imageList = new ImageList ();
 		int imageIndex = imageList.indexOf (image);
 		if (imageIndex == -1) {
 			imageIndex = imageList.add (image);
 		} else {
 			imageList.put (imageIndex, image);
 		}
 		int /*long*/ pixbuf = imageList.getPixbuf (imageIndex);
 		if (OS.GTK_VERSION >= OS.VERSION (2, 10, 0)) {
 			OS.gtk_status_icon_set_from_pixbuf (handle, pixbuf);
 			OS.gtk_status_icon_set_visible (handle, true);
 		} else {
 			Rectangle rect = image.getBounds ();
 			OS.gtk_widget_set_size_request (handle, rect.width, rect.height);
 			OS.gtk_image_set_from_pixbuf (imageHandle, pixbuf);
 			OS.gtk_widget_show (imageHandle);
 		}
 	} else {
 		OS.gtk_widget_set_size_request (handle, 1, 1);
 		if (OS.GTK_VERSION >= OS.VERSION (2, 10, 0)) {
 			OS.gtk_status_icon_set_from_pixbuf (handle, 0);
 			OS.gtk_status_icon_set_visible (handle, false);
 		} else {
 			OS.gtk_image_set_from_pixbuf (imageHandle, 0);
 			OS.gtk_widget_hide (imageHandle);
 		}
 	}
 }

 /**
  * Sets the receiver's tool tip to the argument, which
  * may be null indicating that no tool tip should be shown.
  *
  * @param toolTip the new tool tip (or null)
  *
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  *
  * @since 3.2
  */
 public void setToolTip (ToolTip toolTip) {
 	checkWidget ();
 	ToolTip oldTip = this.toolTip, newTip = toolTip;
 	if (oldTip != null) oldTip.item = null;
 	this.toolTip = newTip;
 	if (newTip != null) newTip.item = this;
 }

 /**
  * Sets the receiver's tool tip text to the argument, which
  * may be null indicating that the default tool tip for the
  * control will be shown. For a control that has a default
  * tool tip, such as the Tree control on Windows, setting
  * the tool tip text to an empty string replaces the default,
  * causing no tool tip text to be shown.
  * <p>
  * The mnemonic indicator (character '&amp;') is not displayed in a tool tip.
  * To display a single '&amp;' in the tool tip, the character '&amp;' can be
  * escaped by doubling it in the string.
  * </p>
  *
  * @param string the new tool tip text (or null)
  *
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  */
 public void setToolTipText (String string) {
 	checkWidget ();
 	toolTipText = string;
 	byte [] buffer = null;
 	if (string != null && string.length () > 0) {
 		buffer = Converter.wcsToMbcs (null, string, true);
 	}
 	if (tooltipsHandle == 0) {
 		tooltipsHandle = OS.gtk_tooltips_new ();
 		if (tooltipsHandle == 0) error (SWT.ERROR_NO_HANDLES);
 		OS.g_object_ref (tooltipsHandle);
 		OS.gtk_object_sink (tooltipsHandle);
 	}
 	if (OS.GTK_VERSION >= OS.VERSION (2, 10, 0)) {
 		OS.gtk_status_icon_set_tooltip (handle, buffer);
 	} else
 		OS.gtk_tooltips_set_tip (tooltipsHandle, handle, buffer, null);
 }

 /**
  * Makes the receiver visible if the argument is <code>true</code>,
  * and makes it invisible otherwise.
  *
  * @param visible the new visibility state
  *
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  */
 public void setVisible (boolean visible) {
 	checkWidget ();
 	if (OS.GTK_VERSION >= OS.VERSION (2, 10, 0)) {
 		if(OS.gtk_status_icon_get_visible (handle) == visible) return;
 	} else {
 		if (OS.GTK_WIDGET_VISIBLE (handle) == visible) return;
 	}
 	if (visible) {
 		/*
 		* It is possible (but unlikely), that application
 		* code could have disposed the widget in the show
 		* event.  If this happens, just return.
 		*/
 		sendEvent (SWT.Show);
 		if (isDisposed ()) return;
 		if (OS.GTK_VERSION >= OS.VERSION (2, 10, 0)) {
 			OS.gtk_status_icon_set_visible (handle, visible);
 		} else
 			OS.gtk_widget_show (handle);
 	} else {
 		if (OS.GTK_VERSION >= OS.VERSION (2, 10, 0)) {
 			OS.gtk_status_icon_set_visible (handle, visible);
 		} else
 			OS.gtk_widget_hide (handle);
 		sendEvent (SWT.Hide);
 	}
 }
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2008 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.swt.widgets;

	import org.eclipse.swt.*;
	import org.eclipse.swt.events.*;
	import org.eclipse.swt.graphics.*;
	import org.eclipse.swt.internal.*;
	import org.eclipse.swt.internal.gtk.*;

	/**
	* Instances of this class represent icons that can be placed on the
	* system tray or task bar status area.
	* <p>
	* <dl>
	* <dt><b>Styles:</b></dt>
	* <dd>(none)</dd>
	* <dt><b>Events:</b></dt>
	* <dd>DefaultSelection, MenuDetect, Selection</dd>
	* </dl>
	* </p><p>
	* IMPORTANT: This class is <em>not</em> intended to be subclassed.
	* </p>
	*
	* @see <a href="http://www.eclipse.org/swt/snippets/#tray">Tray, TrayItem snippets</a>
	* @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
	*
	* @since 3.0
	* @noextend This class is not intended to be subclassed by clients.
	*/
	public class TrayItem extends Item {
	Tray parent;
	ToolTip toolTip;
	String toolTipText;
	int /long/ imageHandle;
	int /long/ tooltipsHandle;
	ImageList imageList;

	/**
	* Constructs a new instance of this class given its parent
	* (which must be a <code>Tray</code>) and a style value
	* describing its behavior and appearance. The item is added
	* to the end of the items maintained by its parent.
	* <p>
	* The style value is either one of the style constants defined in
	* class <code>SWT</code> which is applicable to instances of this
	* class, or must be built by <em>bitwise OR</em>'ing together
	* (that is, using the <code>int</code> "\|" operator) two or more
	* of those <code>SWT</code> style constants. The class description
	* lists the style constants that are applicable to the class.
	* Style bits are also inherited from superclasses.
	* </p>
	*
	* @param parent a composite control which will be the parent of the new instance (cannot be null)
	* @param style the style of control to construct
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
	* </ul>
	* @exception SWTException <ul>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
	* <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
	* </ul>
	*
	* @see SWT
	* @see Widget#checkSubclass
	* @see Widget#getStyle
	*/
	public TrayItem (Tray parent, int style) {
	super (parent, style);
	this.parent = parent;
	createWidget (parent.getItemCount ());
	}

	/**
	* Adds the listener to the collection of listeners who will
	* be notified when the platform-specific context menu trigger
	* has occurred, by sending it one of the messages defined in
	* the <code>MenuDetectListener</code> interface.
	*
	* @param listener the listener which should be notified
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
	* </ul>
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*
	* @see MenuDetectListener
	* @see #removeMenuDetectListener
	*
	* @since 3.3
	*/
	public void addMenuDetectListener (MenuDetectListener listener) {
	checkWidget ();
	if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
	TypedListener typedListener = new TypedListener (listener);
	addListener (SWT.MenuDetect, typedListener);
	}

	/**
	* Adds the listener to the collection of listeners who will
	* be notified when the receiver is selected by the user, by sending
	* it one of the messages defined in the <code>SelectionListener</code>
	* interface.
	* <p>
	* <code>widgetSelected</code> is called when the receiver is selected
	* <code>widgetDefaultSelected</code> is called when the receiver is double-clicked
	* </p>
	*
	* @param listener the listener which should be notified when the receiver is selected by the user
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
	* </ul>
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*
	* @see SelectionListener
	* @see #removeSelectionListener
	* @see SelectionEvent
	*/
	public void addSelectionListener(SelectionListener listener) {
	checkWidget ();
	if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
	TypedListener typedListener = new TypedListener (listener);
	addListener (SWT.Selection, typedListener);
	addListener (SWT.DefaultSelection, typedListener);
	}

	protected void checkSubclass () {
	if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS);
	}

	void createWidget (int index) {
	super.createWidget (index);
	parent.createItem (this, index);
	}

	void createHandle (int index) {
	state \|= HANDLE;
	if (OS.GTK_VERSION >= OS.VERSION (2, 10, 0)) {
	handle = OS.gtk_status_icon_new ();
	if (handle == 0) error (SWT.ERROR_NO_HANDLES);
	imageHandle = OS.gtk_image_new ();
	OS.gtk_status_icon_set_visible (handle,true);
	} else {
	handle = OS.gtk_plug_new (0);
	if (handle == 0) error (SWT.ERROR_NO_HANDLES);
	imageHandle = OS.gtk_image_new ();
	if (imageHandle == 0) error (SWT.ERROR_NO_HANDLES);
	OS.gtk_container_add (handle, imageHandle);
	OS.gtk_widget_show (handle);
	OS.gtk_widget_show (imageHandle);
	int /long/ id = OS.gtk_plug_get_id (handle);
	int monitor = 0;
	int /long/ screen = OS.gdk_screen_get_default ();
	if (screen != 0) {
	monitor = OS.gdk_screen_get_number (screen);
	}
	byte [] trayBuffer = Converter.wcsToMbcs (null, "_NET_SYSTEM_TRAY_S" + monitor, true);
	int /long/ trayAtom = OS.gdk_atom_intern (trayBuffer, true);
	int /long/ xTrayAtom = OS.gdk_x11_atom_to_xatom (trayAtom);
	int /long/ xDisplay = OS.GDK_DISPLAY ();
	int /long/ trayWindow = OS.XGetSelectionOwner (xDisplay, xTrayAtom);
	byte [] messageBuffer = Converter.wcsToMbcs (null, "_NET_SYSTEM_TRAY_OPCODE", true);
	int /long/ messageAtom = OS.gdk_atom_intern (messageBuffer, true);
	int /long/ xMessageAtom = OS.gdk_x11_atom_to_xatom (messageAtom);
	XClientMessageEvent event = new XClientMessageEvent ();
	event.type = OS.ClientMessage;
	event.window = trayWindow;
	event.message_type = xMessageAtom;
	event.format = 32;
	event.data [0] = OS.GDK_CURRENT_TIME;
	event.data [1] = OS.SYSTEM_TRAY_REQUEST_DOCK;
	event.data [2] = id;
	int /long/ clientEvent = OS.g_malloc (XClientMessageEvent.sizeof);
	OS.memmove (clientEvent, event, XClientMessageEvent.sizeof);
	OS.XSendEvent (xDisplay, trayWindow, false, OS.NoEventMask, clientEvent);
	OS.g_free (clientEvent);
	}
	}

	void deregister () {
	super.deregister ();
	display.removeWidget (imageHandle);
	}

	void destroyWidget () {
	parent.destroyItem (this);
	releaseHandle ();
	}

	/**
	* Returns the receiver's parent, which must be a <code>Tray</code>.
	*
	* @return the receiver's parent
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*
	* @since 3.2
	*/
	public Tray getParent () {
	checkWidget ();
	return parent;
	}

	/**
	* Returns the receiver's tool tip, or null if it has
	* not been set.
	*
	* @return the receiver's tool tip text
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*
	* @since 3.2
	*/
	public ToolTip getToolTip () {
	checkWidget ();
	return toolTip;
	}

	/**
	* Returns the receiver's tool tip text, or null if it has
	* not been set.
	*
	* @return the receiver's tool tip text
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public String getToolTipText () {
	checkWidget ();
	return toolTipText;
	}

	int /long/ gtk_activate (int /long/ widget) {
	postEvent (SWT.Selection);
	/*
	* Feature in GTK. GTK will generate a single-click event before sending
	* a double-click event. To know when to send a DefaultSelection, look for
	* the single-click as the current event and for the double-click in the
	* event queue.
	*/
	int /long/ nextEvent = OS.gdk_event_peek ();
	if (nextEvent != 0) {
	int nextEventType = OS.GDK_EVENT_TYPE (nextEvent);
	int /long/ currEvent = OS.gtk_get_current_event ();
	int currEventType = 0;
	if (currEvent != 0) {
	currEventType = OS.GDK_EVENT_TYPE (currEvent);
	OS.gdk_event_free (currEvent);
	}
	OS.gdk_event_free (nextEvent);
	if (currEventType == OS.GDK_BUTTON_PRESS && nextEventType == OS.GDK_2BUTTON_PRESS) {
	postEvent (SWT.DefaultSelection);
	}
	}
	return 0;
	}

	int /long/ gtk_button_press_event (int /long/ widget, int /long/ eventPtr) {
	GdkEventButton gdkEvent = new GdkEventButton ();
	OS.memmove (gdkEvent, eventPtr, GdkEventButton.sizeof);
	if (gdkEvent.type == OS.GDK_3BUTTON_PRESS) return 0;
	if (gdkEvent.button == 3 && gdkEvent.type == OS.GDK_BUTTON_PRESS) {
	sendEvent (SWT.MenuDetect);
	return 0;
	}
	if (gdkEvent.type == OS.GDK_2BUTTON_PRESS) {
	postEvent (SWT.DefaultSelection);
	} else {
	postEvent (SWT.Selection);
	}
	return 0;
	}

	int /long/ gtk_size_allocate (int /long/ widget, int /long/ allocation) {
	if (image != null && image.mask != 0) {
	if (OS.gdk_drawable_get_depth (image.mask) == 1) {
	int xoffset = (int) Math.floor (OS.GTK_WIDGET_X (widget) + ((OS.GTK_WIDGET_WIDTH (widget) - OS.GTK_WIDGET_REQUISITION_WIDTH (widget)) * 0.5) + 0.5);
	int yoffset = (int) Math.floor (OS.GTK_WIDGET_Y (widget) + ((OS.GTK_WIDGET_HEIGHT (widget) - OS.GTK_WIDGET_REQUISITION_HEIGHT (widget)) * 0.5) + 0.5);
	Rectangle b = image.getBounds();
	int /long/ gdkImagePtr = OS.gdk_drawable_get_image (image.mask, 0, 0, b.width, b.height);
	if (gdkImagePtr == 0) SWT.error(SWT.ERROR_NO_HANDLES);
	GdkImage gdkImage = new GdkImage();
	OS.memmove (gdkImage, gdkImagePtr);
	byte[] maskData = new byte [gdkImage.bpl * gdkImage.height];
	OS.memmove (maskData, gdkImage.mem, maskData.length);
	OS.g_object_unref (gdkImagePtr);
	Region region = new Region (display);
	for (int y = 0; y < b.height; y++) {
	for (int x = 0; x < b.width; x++) {
	int index = (y * gdkImage.bpl) + (x >> 3);
	int theByte = maskData [index] & 0xFF;
	int mask = 1 << (x & 0x7);
	if ((theByte & mask) != 0) {
	region.add (xoffset + x, yoffset + y, 1, 1);
	}
	}
	}
	OS.gtk_widget_realize (handle);
	int /long/ window = OS.GTK_WIDGET_WINDOW (handle);
	OS.gdk_window_shape_combine_region (window, region.handle, 0, 0);
	region.dispose ();
	}
	}
	return 0;
	}

	int /long/ gtk_status_icon_popup_menu (int /long/ widget, int /long/ button, int /long/ activate_time) {
	sendEvent (SWT.MenuDetect);
	return 0;
	}

	void hookEvents () {
	if (OS.GTK_VERSION >= OS.VERSION (2, 10, 0)) {
	OS.g_signal_connect_closure (handle, OS.activate, display.closures [ACTIVATE], false);
	OS.g_signal_connect_closure (handle, OS.popup_menu, display.closures [STATUS_ICON_POPUP_MENU], false);
	} else {
	int eventMask = OS.GDK_BUTTON_PRESS_MASK;
	OS.gtk_widget_add_events (handle, eventMask);
	OS.g_signal_connect_closure_by_id (handle, display.signalIds [BUTTON_PRESS_EVENT], 0, display.closures [BUTTON_PRESS_EVENT], false);
	OS.g_signal_connect_closure_by_id (imageHandle, display.signalIds [SIZE_ALLOCATE], 0, display.closures [SIZE_ALLOCATE], false);
	}
	}

	/**
	* Returns <code>true</code> if the receiver is visible and
	* <code>false</code> otherwise.
	*
	* @return the receiver's visibility
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public boolean getVisible () {
	checkWidget ();
	if (OS.GTK_VERSION >= OS.VERSION (2, 10, 0)) {
	return OS.gtk_status_icon_get_visible (handle);
	}
	return OS.GTK_WIDGET_VISIBLE (handle);
	}

	void register () {
	super.register ();
	display.addWidget (imageHandle, this);
	}

	void releaseHandle () {
	if (handle != 0) {
	if (OS.GTK_VERSION >= OS.VERSION (2, 10, 0)) {
	OS.g_object_unref (handle);
	} else {
	OS.gtk_widget_destroy (handle);
	}
	}
	handle = imageHandle = 0;
	super.releaseHandle ();
	parent = null;
	}

	void releaseWidget () {
	super.releaseWidget ();
	if (tooltipsHandle != 0) OS.g_object_unref (tooltipsHandle);
	tooltipsHandle = 0;
	if (imageList != null) imageList.dispose ();
	imageList = null;
	toolTipText = null;
	}

	/**
	* Removes the listener from the collection of listeners who will
	* be notified when the platform-specific context menu trigger has
	* occurred.
	*
	* @param listener the listener which should no longer be notified
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
	* </ul>
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*
	* @see MenuDetectListener
	* @see #addMenuDetectListener
	*
	* @since 3.3
	*/
	public void removeMenuDetectListener (MenuDetectListener listener) {
	checkWidget ();
	if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
	if (eventTable == null) return;
	eventTable.unhook (SWT.MenuDetect, listener);
	}

	/**
	* Removes the listener from the collection of listeners who will
	* be notified when the receiver is selected by the user.
	*
	* @param listener the listener which should no longer be notified
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
	* </ul>
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*
	* @see SelectionListener
	* @see #addSelectionListener
	*/
	public void removeSelectionListener (SelectionListener listener) {
	checkWidget ();
	if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
	if (eventTable == null) return;
	eventTable.unhook (SWT.Selection, listener);
	eventTable.unhook (SWT.DefaultSelection, listener);
	}

	/**
	* Sets the receiver's image.
	*
	* @param image the new image
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li>
	* </ul>
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public void setImage (Image image) {
	checkWidget ();
	if (image != null && image.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
	this.image = image;
	if (image != null) {
	if (imageList == null) imageList = new ImageList ();
	int imageIndex = imageList.indexOf (image);
	if (imageIndex == -1) {
	imageIndex = imageList.add (image);
	} else {
	imageList.put (imageIndex, image);
	}
	int /long/ pixbuf = imageList.getPixbuf (imageIndex);
	if (OS.GTK_VERSION >= OS.VERSION (2, 10, 0)) {
	OS.gtk_status_icon_set_from_pixbuf (handle, pixbuf);
	OS.gtk_status_icon_set_visible (handle, true);
	} else {
	Rectangle rect = image.getBounds ();
	OS.gtk_widget_set_size_request (handle, rect.width, rect.height);
	OS.gtk_image_set_from_pixbuf (imageHandle, pixbuf);
	OS.gtk_widget_show (imageHandle);
	}
	} else {
	OS.gtk_widget_set_size_request (handle, 1, 1);
	if (OS.GTK_VERSION >= OS.VERSION (2, 10, 0)) {
	OS.gtk_status_icon_set_from_pixbuf (handle, 0);
	OS.gtk_status_icon_set_visible (handle, false);
	} else {
	OS.gtk_image_set_from_pixbuf (imageHandle, 0);
	OS.gtk_widget_hide (imageHandle);
	}
	}
	}

	/**
	* Sets the receiver's tool tip to the argument, which
	* may be null indicating that no tool tip should be shown.
	*
	* @param toolTip the new tool tip (or null)
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*
	* @since 3.2
	*/
	public void setToolTip (ToolTip toolTip) {
	checkWidget ();
	ToolTip oldTip = this.toolTip, newTip = toolTip;
	if (oldTip != null) oldTip.item = null;
	this.toolTip = newTip;
	if (newTip != null) newTip.item = this;
	}

	/**
	* Sets the receiver's tool tip text to the argument, which
	* may be null indicating that the default tool tip for the
	* control will be shown. For a control that has a default
	* tool tip, such as the Tree control on Windows, setting
	* the tool tip text to an empty string replaces the default,
	* causing no tool tip text to be shown.
	* <p>
	* The mnemonic indicator (character '&') is not displayed in a tool tip.
	* To display a single '&' in the tool tip, the character '&' can be
	* escaped by doubling it in the string.
	* </p>
	*
	* @param string the new tool tip text (or null)
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public void setToolTipText (String string) {
	checkWidget ();
	toolTipText = string;
	byte [] buffer = null;
	if (string != null && string.length () > 0) {
	buffer = Converter.wcsToMbcs (null, string, true);
	}
	if (tooltipsHandle == 0) {
	tooltipsHandle = OS.gtk_tooltips_new ();
	if (tooltipsHandle == 0) error (SWT.ERROR_NO_HANDLES);
	OS.g_object_ref (tooltipsHandle);
	OS.gtk_object_sink (tooltipsHandle);
	}
	if (OS.GTK_VERSION >= OS.VERSION (2, 10, 0)) {
	OS.gtk_status_icon_set_tooltip (handle, buffer);
	} else
	OS.gtk_tooltips_set_tip (tooltipsHandle, handle, buffer, null);
	}

	/**
	* Makes the receiver visible if the argument is <code>true</code>,
	* and makes it invisible otherwise.
	*
	* @param visible the new visibility state
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public void setVisible (boolean visible) {
	checkWidget ();
	if (OS.GTK_VERSION >= OS.VERSION (2, 10, 0)) {
	if(OS.gtk_status_icon_get_visible (handle) == visible) return;
	} else {
	if (OS.GTK_WIDGET_VISIBLE (handle) == visible) return;
	}
	if (visible) {
	/*
	* It is possible (but unlikely), that application
	* code could have disposed the widget in the show
	* event. If this happens, just return.
	*/
	sendEvent (SWT.Show);
	if (isDisposed ()) return;
	if (OS.GTK_VERSION >= OS.VERSION (2, 10, 0)) {
	OS.gtk_status_icon_set_visible (handle, visible);
	} else
	OS.gtk_widget_show (handle);
	} else {
	if (OS.GTK_VERSION >= OS.VERSION (2, 10, 0)) {
	OS.gtk_status_icon_set_visible (handle, visible);
	} else
	OS.gtk_widget_hide (handle);
	sendEvent (SWT.Hide);
	}
	}
	}