Package org.eclipse.swt.widgets

Class ToolTip

java.lang.Object

org.eclipse.swt.widgets.Widget

org.eclipse.swt.widgets.ToolTip

All Implemented Interfaces:

Adaptable

public class ToolTip
extends Widget

Instances of this class represent popup windows that are used to inform or warn the user.

Styles:

BALLOON, ICON_ERROR, ICON_INFORMATION, ICON_WARNING

Events:

Selection

Note: Only one of the styles ICON_ERROR, ICON_INFORMATION, and ICON_WARNING may be specified.

IMPORTANT: This class is not intended to be subclassed.

Since:

1.4

See Also:

• Tool Tips snippets
• SWT Example: ControlExample
• Sample code and further information

Constructor Summary

Constructors

Constructor	Description
ToolTip(Shell parent, int style)	Constructs a new instance of this class given its parent and a style value describing its behavior and appearance.

Method Summary

Modifier and Type	Method	Description
void	addSelectionListener(SelectionListener listener)	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 SelectionListener interface.
<T> T	getAdapter(Class<T> adapter)	Implementation of the Adaptable interface.
boolean	getAutoHide()	Returns true if the receiver is automatically hidden by the platform, and false otherwise.
String	getMessage()	Returns the receiver's message, which will be an empty string if it has never been set.
Shell	getParent()	Returns the receiver's parent, which must be a Shell.
String	getText()	Returns the receiver's text, which will be an empty string if it has never been set.
boolean	getVisible()	Returns true if the receiver is visible, and false otherwise.
boolean	isVisible()	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 by the user.
void	setAutoHide(boolean autoHide)	Makes the receiver hide automatically when true, and remain visible when false.
void	setData(String key, Object value)	Sets the application defined property of the receiver with the specified name to the given value.
void	setLocation(int x, int y)	Sets the location of the receiver, which must be a tooltip, to the point specified by the arguments which are relative to the display.
void	setLocation(Point location)	Sets the location of the receiver, which must be a tooltip, to the point specified by the argument which is relative to the display.
void	setMessage(String message)	Sets the receiver's message.
void	setText(String text)	Sets the receiver's text.
void	setVisible(boolean visible)	Marks the receiver as visible if the argument is true, and marks it invisible otherwise.

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

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

Methods inherited from class java.lang.Object

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

Constructor Details

ToolTip

public ToolTip(Shell parent,
 int style)

Constructs a new instance of this class given its parent and a style value describing its behavior and appearance.

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.BALLOON
• SWT.ICON_ERROR
• SWT.ICON_INFORMATION
• SWT.ICON_WARNING
• Widget.checkSubclass()
• Widget.getStyle()

Method Details

getAdapter

public <T> T getAdapter(Class<T> adapter)

Description copied from class: Widget

Implementation of the Adaptable interface.

IMPORTANT: This method is not part of the RWT public API. It is marked public only so that it can be shared within the packages provided by RWT. It should never be accessed from application code.

Specified by:

getAdapter in interface Adaptable

Overrides:

getAdapter in class Widget

Parameters:

adapter - the lookup class

Returns:

an object that can be cast to the given class or null if there is no adapter associated with the given class.

getParent

public Shell getParent()

Returns the receiver's parent, which must be a Shell.

Returns:

the receiver's parent

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

getAutoHide

public boolean getAutoHide()

Returns true if the receiver is automatically hidden by the platform, and false otherwise.

Returns:

the receiver's auto hide 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

setAutoHide

public void setAutoHide(boolean autoHide)

Makes the receiver hide automatically when true, and remain visible when false.

Parameters:

autoHide - the auto hide 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

See Also:

• getVisible()
• setVisible(boolean)

isVisible

public boolean isVisible()

Returns true if the receiver is visible, and false otherwise.

If one of the receiver's ancestors is not visible or some other condition makes the receiver not visible, this method may still indicate that it is considered visible even though it may not actually be showing.

Returns:

the receiver's 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

getVisible

public boolean getVisible()

Returns true if the receiver is visible, and false otherwise.

If one of the receiver's ancestors is not visible or some other condition makes the receiver not visible, this method may still indicate that it is considered visible even though it may not actually be showing.

Returns:

the receiver's 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

setVisible

public void setVisible(boolean visible)

Marks the receiver as visible if the argument is true, and marks it invisible otherwise.

If one of the receiver's ancestors is not visible or some other condition makes the receiver not visible, marking it visible may not actually cause it to be displayed.

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

getText

public String getText()

Returns the receiver's text, which will be an empty string if it has never been set.

Returns:

the receiver's 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

setText

public void setText(String text)

Sets the receiver's text.

Parameters:

text - the new text

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the text 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

getMessage

public String getMessage()

Returns the receiver's message, which will be an empty string if it has never been set.

Returns:

the receiver's message

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

setMessage

public void setMessage(String message)

Sets the receiver's message.

Parameters:

message - the new message

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the text 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

setLocation

public void setLocation(int x,
 int y)

Sets the location of the receiver, which must be a tooltip, to the point specified by the arguments which are relative to the display.

Note that this is different from most widgets where the location of the widget is relative to the parent.

Parameters:

x - the new x coordinate for the receiver

y - the new y coordinate for the receiver

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

setLocation

public void setLocation(Point location)

Sets the location of the receiver, which must be a tooltip, to the point specified by the argument which is relative to the display.

Note that this is different from most widgets where the location of the widget is relative to the parent.

Note that the platform window manager ultimately has control over the location of tooltips.

Parameters:

location - the new location for the receiver

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the point 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

addSelectionListener

public void addSelectionListener(SelectionListener listener)

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 SelectionListener interface.

widgetSelected is called when the receiver is selected. widgetDefaultSelected is not called.

Parameters:

listener - the listener which should be notified when the receiver is selected by the user

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

removeSelectionListener

public void removeSelectionListener(SelectionListener listener)

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

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)

setData

public void setData(String key,
 Object value)

Description copied from class: Widget

Sets the application defined property of the receiver with the specified name to the given value.

Applications may associate arbitrary objects with the receiver in this fashion. If the objects stored in the properties need to be notified when the widget is disposed of, it is the application's responsibility to hook the Dispose event on the widget and do so.

Overrides:

setData in class Widget

Parameters:

key - the name of the property

value - the new value for the property

See Also:

• Widget.getData(String)