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

 /*******************************************************************************
  * Copyright (c) 2000, 2017 IBM Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
  * https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * 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.
  * <dl>
  * <dt><b>Styles:</b></dt>
  * <dd>(none)</dd>
  * <dt><b>Events:</b></dt>
  * <dd>DefaultSelection, MenuDetect, Selection</dd>
  * </dl>
  * <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;
 	long imageHandle;
 	long tooltipsHandle;
 	ImageList imageList;
 	Image highlightImage;

 /**
  * 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);
 }

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

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

 @Override
 void createHandle (int index) {
 	state |= HANDLE;
 	handle = GTK.gtk_status_icon_new ();
 	if (handle == 0) error (SWT.ERROR_NO_HANDLES);
 	imageHandle = GTK.gtk_image_new ();
 	GTK.gtk_status_icon_set_visible (handle,true);
 }

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

 @Override
 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 highlight image if it has one, or null
  * if it does not.
  *
  * @return the receiver's highlight image
  *
  * @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 3.8
  */
 public Image getHighlightImage () {
 	checkWidget ();
 	return highlightImage;
 }

 /**
  * 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;
 }

 @Override
 long gtk_activate (long widget) {
 	sendSelectionEvent (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.
 	*/
 	long nextEvent = GDK.gdk_event_peek();
 	if (nextEvent != 0) {
 		int nextEventType = GDK.GDK_EVENT_TYPE (nextEvent);
 		long currEvent = GTK.gtk_get_current_event ();
 		int currEventType = 0;
 		if (currEvent != 0) {
 			currEventType = GDK.GDK_EVENT_TYPE (currEvent);
 			gdk_event_free(currEvent);
 		}
 		gdk_event_free (nextEvent);
 		currEventType = Control.fixGdkEventTypeValues(currEventType);
 		nextEventType = Control.fixGdkEventTypeValues(nextEventType);
 		if (currEventType == GDK.GDK_BUTTON_PRESS && nextEventType == GDK.GDK_2BUTTON_PRESS) {
 			sendSelectionEvent (SWT.DefaultSelection);
 		}
 	}
 	return 0;
 }

 @Override
 long gtk_button_press_event (long widget, long event) {
 	int eventType = GDK.gdk_event_get_event_type(event);

 	int [] eventButton = new int [1];
 	GDK.gdk_event_get_button(event, eventButton);


 	if (eventType == GDK.GDK_3BUTTON_PRESS) return 0;
 	if (eventButton[0] == 3 && eventType == GDK.GDK_BUTTON_PRESS) {
 		sendEvent (SWT.MenuDetect);
 		return 0;
 	}
 	if (eventType == GDK.GDK_2BUTTON_PRESS) {
 		sendSelectionEvent (SWT.DefaultSelection);
 	} else {
 		sendSelectionEvent (SWT.Selection);
 	}
 	return 0;
 }

 @Override
 long gtk_gesture_press_event(long gesture, int n_press, double x, double y, long event) {
 	switch (n_press) {
 		case 1: {
 			int eventButton = GDK.gdk_button_event_get_button(event);
 			if (eventButton == 3) {
 				sendEvent(SWT.MenuDetect);
 			} else {
 				sendEvent(SWT.Selection);
 			}
 			break;
 		}
 		case 2: {
 			sendSelectionEvent(SWT.DefaultSelection);
 			break;
 		}
 		default:
 			break;
 	}

 	return 0;
 }

 @Override
 long gtk_size_allocate (long widget, long allocation) {
 	return 0;
 }

 @Override
 long gtk_status_icon_popup_menu (long widget, long button, long activate_time) {
 	/*
 	* GTK provides a MenuPositionFunc for GtkStatusIcon in order
 	* to set the popup-menu aligned to the tray.
 	*/
 	Display display = this.display;
 	display.currentTrayItem = this;
 	sendEvent (SWT.MenuDetect);
 	if (!isDisposed ()) display.runPopups();
 	display.currentTrayItem = null;
 	return 0;
 }

 @Override
 void hookEvents () {
 	OS.g_signal_connect_closure (handle, OS.activate, display.getClosure (ACTIVATE), false);
 	OS.g_signal_connect_closure (handle, OS.popup_menu, display.getClosure (STATUS_ICON_POPUP_MENU), 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 ();
 	return GTK.gtk_status_icon_get_visible (handle);
 }

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

 @Override
 void releaseHandle () {
 	if (handle != 0) {
 		OS.g_object_unref (handle);
 	}
 	handle = imageHandle = 0;
 	super.releaseHandle ();
 	parent = null;
 }

 @Override
 void releaseWidget () {
 	super.releaseWidget ();
 	if (tooltipsHandle != 0) OS.g_object_unref (tooltipsHandle);
 	tooltipsHandle = 0;
 	if (imageList != null) imageList.dispose ();
 	imageList = null;
 	toolTipText = null;
 	highlightImage = 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 highlight image.
  *
  * @param image the new highlight 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>
  *
  * @since 3.8
  */
 public void setHighlightImage (Image image) {
 	checkWidget ();
 	if (image != null && image.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
 	highlightImage = image;
 }

 /**
  * 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>
  */
 @Override
 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);
 		}
 		long pixbuf = imageList.getPixbuf (imageIndex);
 		GTK.gtk_status_icon_set_from_pixbuf (handle, pixbuf);
 		GTK.gtk_status_icon_set_visible (handle, true);
 	} else {
 		GTK.gtk_widget_set_size_request (handle, 1, 1);
 		GTK.gtk_status_icon_set_from_pixbuf (handle, 0);
 		GTK.gtk_status_icon_set_visible (handle, false);
 	}
 }

 /**
  * 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>
  * <p>
  * NOTE: This operation is a hint and behavior is platform specific, on Windows
  * for CJK-style mnemonics of the form " (&amp;C)" at the end of the tooltip text
  * are not shown in tooltip.
  * </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 (string, true);
 	}
 	GTK.gtk_status_icon_set_tooltip_text (handle, buffer);
 }

 /**
  * 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(GTK.gtk_status_icon_get_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;
 		GTK.gtk_status_icon_set_visible (handle, visible);
 	} else {
 		GTK.gtk_status_icon_set_visible (handle, visible);
 		sendEvent (SWT.Hide);
 	}
 }
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2017 IBM Corporation and others.
	*
	* This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License 2.0
	* which accompanies this distribution, and is available at
	* https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* 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.
	* <dl>
	* <dt><b>Styles:</b></dt>
	* <dd>(none)</dd>
	* <dt><b>Events:</b></dt>
	* <dd>DefaultSelection, MenuDetect, Selection</dd>
	* </dl>
	* <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;
	long imageHandle;
	long tooltipsHandle;
	ImageList imageList;
	Image highlightImage;

	/**
	* 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);
	}

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

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

	@Override
	void createHandle (int index) {
	state \|= HANDLE;
	handle = GTK.gtk_status_icon_new ();
	if (handle == 0) error (SWT.ERROR_NO_HANDLES);
	imageHandle = GTK.gtk_image_new ();
	GTK.gtk_status_icon_set_visible (handle,true);
	}

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

	@Override
	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 highlight image if it has one, or null
	* if it does not.
	*
	* @return the receiver's highlight image
	*
	* @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 3.8
	*/
	public Image getHighlightImage () {
	checkWidget ();
	return highlightImage;
	}

	/**
	* 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;
	}

	@Override
	long gtk_activate (long widget) {
	sendSelectionEvent (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.
	*/
	long nextEvent = GDK.gdk_event_peek();
	if (nextEvent != 0) {
	int nextEventType = GDK.GDK_EVENT_TYPE (nextEvent);
	long currEvent = GTK.gtk_get_current_event ();
	int currEventType = 0;
	if (currEvent != 0) {
	currEventType = GDK.GDK_EVENT_TYPE (currEvent);
	gdk_event_free(currEvent);
	}
	gdk_event_free (nextEvent);
	currEventType = Control.fixGdkEventTypeValues(currEventType);
	nextEventType = Control.fixGdkEventTypeValues(nextEventType);
	if (currEventType == GDK.GDK_BUTTON_PRESS && nextEventType == GDK.GDK_2BUTTON_PRESS) {
	sendSelectionEvent (SWT.DefaultSelection);
	}
	}
	return 0;
	}

	@Override
	long gtk_button_press_event (long widget, long event) {
	int eventType = GDK.gdk_event_get_event_type(event);

	int [] eventButton = new int [1];
	GDK.gdk_event_get_button(event, eventButton);


	if (eventType == GDK.GDK_3BUTTON_PRESS) return 0;
	if (eventButton[0] == 3 && eventType == GDK.GDK_BUTTON_PRESS) {
	sendEvent (SWT.MenuDetect);
	return 0;
	}
	if (eventType == GDK.GDK_2BUTTON_PRESS) {
	sendSelectionEvent (SWT.DefaultSelection);
	} else {
	sendSelectionEvent (SWT.Selection);
	}
	return 0;
	}

	@Override
	long gtk_gesture_press_event(long gesture, int n_press, double x, double y, long event) {
	switch (n_press) {
	case 1: {
	int eventButton = GDK.gdk_button_event_get_button(event);
	if (eventButton == 3) {
	sendEvent(SWT.MenuDetect);
	} else {
	sendEvent(SWT.Selection);
	}
	break;
	}
	case 2: {
	sendSelectionEvent(SWT.DefaultSelection);
	break;
	}
	default:
	break;
	}

	return 0;
	}

	@Override
	long gtk_size_allocate (long widget, long allocation) {
	return 0;
	}

	@Override
	long gtk_status_icon_popup_menu (long widget, long button, long activate_time) {
	/*
	* GTK provides a MenuPositionFunc for GtkStatusIcon in order
	* to set the popup-menu aligned to the tray.
	*/
	Display display = this.display;
	display.currentTrayItem = this;
	sendEvent (SWT.MenuDetect);
	if (!isDisposed ()) display.runPopups();
	display.currentTrayItem = null;
	return 0;
	}

	@Override
	void hookEvents () {
	OS.g_signal_connect_closure (handle, OS.activate, display.getClosure (ACTIVATE), false);
	OS.g_signal_connect_closure (handle, OS.popup_menu, display.getClosure (STATUS_ICON_POPUP_MENU), 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 ();
	return GTK.gtk_status_icon_get_visible (handle);
	}

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

	@Override
	void releaseHandle () {
	if (handle != 0) {
	OS.g_object_unref (handle);
	}
	handle = imageHandle = 0;
	super.releaseHandle ();
	parent = null;
	}

	@Override
	void releaseWidget () {
	super.releaseWidget ();
	if (tooltipsHandle != 0) OS.g_object_unref (tooltipsHandle);
	tooltipsHandle = 0;
	if (imageList != null) imageList.dispose ();
	imageList = null;
	toolTipText = null;
	highlightImage = 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 highlight image.
	*
	* @param image the new highlight 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>
	*
	* @since 3.8
	*/
	public void setHighlightImage (Image image) {
	checkWidget ();
	if (image != null && image.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
	highlightImage = image;
	}

	/**
	* 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>
	*/
	@Override
	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);
	}
	long pixbuf = imageList.getPixbuf (imageIndex);
	GTK.gtk_status_icon_set_from_pixbuf (handle, pixbuf);
	GTK.gtk_status_icon_set_visible (handle, true);
	} else {
	GTK.gtk_widget_set_size_request (handle, 1, 1);
	GTK.gtk_status_icon_set_from_pixbuf (handle, 0);
	GTK.gtk_status_icon_set_visible (handle, false);
	}
	}

	/**
	* 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>
	* <p>
	* NOTE: This operation is a hint and behavior is platform specific, on Windows
	* for CJK-style mnemonics of the form " (&C)" at the end of the tooltip text
	* are not shown in tooltip.
	* </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 (string, true);
	}
	GTK.gtk_status_icon_set_tooltip_text (handle, buffer);
	}

	/**
	* 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(GTK.gtk_status_icon_get_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;
	GTK.gtk_status_icon_set_visible (handle, visible);
	} else {
	GTK.gtk_status_icon_set_visible (handle, visible);
	sendEvent (SWT.Hide);
	}
	}
	}