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Eclipse Platform
Release 3.0

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org.eclipse.swt.widgets
Class TrayItem

java.lang.Object
  org.eclipse.swt.widgets.Widget
      org.eclipse.swt.widgets.Item
          org.eclipse.swt.widgets.TrayItem

public class TrayItem

extends Item

Instances of this class represent icons that can be placed on the system tray or task bar status area.

Styles:

(none)

Events:

DefaultSelection, MenuDetect, Selection

IMPORTANT: This class is not intended to be subclassed.

Since:

3.0

Constructor Summary

TrayItem(Tray parent, int style)
Constructs a new instance of this class given its parent (which must be a Tray) and a style value describing its behavior and appearance.

Method Summary

void	addSelectionListener(SelectionListener listener) Adds the listener to the collection of listeners who will be notified when the receiver is selected, by sending it one of the messages defined in the SelectionListener interface.
String	getToolTipText() Returns the receiver's tool tip text, or null if it has not been set.
boolean	getVisible() Returns true if the receiver is visible and false otherwise.
void	removeSelectionListener(SelectionListener listener) Removes the listener from the collection of listeners who will be notified when the receiver is selected.
void	setImage(Image image) Sets the receiver's image.
void	setToolTipText(String value) Sets the receiver's tool tip text to the argument, which may be null indicating that no tool tip text should be shown.
void	setVisible(boolean visible) Makes the receiver visible if the argument is true, and makes it invisible otherwise.

Methods inherited from class org.eclipse.swt.widgets.Item

checkSubclass, getImage, getText, setText

Methods inherited from class org.eclipse.swt.widgets.Widget

addDisposeListener, addListener, checkWidget, dispose, getData, getData, getDisplay, getStyle, isDisposed, isListening, notifyListeners, removeDisposeListener, removeListener, removeListener, setData, setData, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

TrayItem

public TrayItem(Tray parent,
                int style)

Constructs a new instance of this class given its parent (which must be a Tray) and a style value describing its behavior and appearance. The item is added to the end of the items maintained by its parent.

The style value is either one of the style constants defined in class SWT which is applicable to instances of this class, or must be built by bitwise OR'ing together (that is, using the int "|" operator) two or more of those SWT style constants. The class description lists the style constants that are applicable to the class. Style bits are also inherited from superclasses.

Parameters:

parent - a composite control which will be the parent of the new instance (cannot be null)

style - the style of control to construct

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the parent is null

SWTException -

• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent
• ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass

See Also:

SWT, Widget.checkSubclass(), Widget.getStyle()

Method Detail

addSelectionListener

public void addSelectionListener(SelectionListener listener)

Adds the listener to the collection of listeners who will be notified when the receiver is selected, by sending it one of the messages defined in the SelectionListener interface.

widgetSelected is called when the receiver is selected widgetDefaultSelected is called when the receiver is double-clicked

Parameters:

listener - the listener which should be notified

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the listener is null

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

See Also:

SelectionListener, removeSelectionListener(org.eclipse.swt.events.SelectionListener), SelectionEvent

getToolTipText

public String getToolTipText()

Returns the receiver's tool tip text, or null if it has not been set.

Returns:

the receiver's tool tip text

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

getVisible

public boolean getVisible()

Returns true if the receiver is visible and false otherwise.

Returns:

the receiver's visibility

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

removeSelectionListener

public void removeSelectionListener(SelectionListener listener)

Removes the listener from the collection of listeners who will be notified when the receiver is selected.

Parameters:

listener - the listener which should no longer be notified

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the listener is null

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

See Also:

SelectionListener, addSelectionListener(org.eclipse.swt.events.SelectionListener)

setImage

public void setImage(Image image)

Sets the receiver's image.

Overrides:

setImage in class Item

Parameters:

image - the new image

Throws:

IllegalArgumentException -

• ERROR_INVALID_ARGUMENT - if the image has been disposed

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

setToolTipText

public void setToolTipText(String value)

Sets the receiver's tool tip text to the argument, which may be null indicating that no tool tip text should be shown.

Parameters:

value - the new tool tip text (or null)

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

setVisible

public void setVisible(boolean visible)

Makes the receiver visible if the argument is true, and makes it invisible otherwise.

Parameters:

visible - the new visibility state

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver