All Packages  Class Hierarchy  This Package  Previous  Next  Index

Class java.awt.event.FocusEvent

java.lang.Object
   |
   +----java.util.EventObject
           |
           +----java.awt.AWTEvent
                   |
                   +----java.awt.event.ComponentEvent
                           |
                           +----java.awt.event.FocusEvent

public class FocusEvent
extends ComponentEvent

The component-level focus event. There are two levels of focus change events: permanent and temporary. Permanent focus change events occur when focus is directly moved from one component to another, such as through calls to requestFocus() or as the user uses the Tab key to traverse components. Temporary focus change events occur when focus is temporarily gained or lost for a component as the indirect result of another operation, such as window deactivation or a scrollbar drag. In this case, the original focus state will automatically be restored once that operation is finished, or, for the case of window deactivation, when the window is reactivated. Both permanent and temporary focus events are delivered using the FOCUS_GAINED and FOCUS_LOST event ids; the levels may be distinguished in the event using the isTemporary() method.

FOCUS_FIRST: Marks the first integer id for the range of focus event ids.
FOCUS_GAINED: The focus gained event type.
FOCUS_LAST: Marks the last integer id for the range of focus event ids.
FOCUS_LOST: The focus lost event type.

FocusEvent(Component, int): Constructs a permanent-level FocusEvent object with the specified source component and type.
FocusEvent(Component, int, boolean): Constructs a FocusEvent object with the specified source component, type, and whether or not the focus event is a temporary level event.

isTemporary(): Returns whether or not this focus change event is a temporary change.
paramString()

FOCUS_FIRST

 public static final int FOCUS_FIRST

Marks the first integer id for the range of focus event ids.

FOCUS_LAST

 public static final int FOCUS_LAST

Marks the last integer id for the range of focus event ids.

FOCUS_GAINED

 public static final int FOCUS_GAINED

The focus gained event type.

FOCUS_LOST

 public static final int FOCUS_LOST

The focus lost event type.

FocusEvent

 public FocusEvent(Component source,
                   int id,
                   boolean temporary)

Constructs a FocusEvent object with the specified source component, type, and whether or not the focus event is a temporary level event.

Parameters:: source - the object where the event originated

FocusEvent

 public FocusEvent(Component source,
                   int id)

Constructs a permanent-level FocusEvent object with the specified source component and type.

Parameters:: source - the object where the event originated

isTemporary

 public boolean isTemporary()

Returns whether or not this focus change event is a temporary change.

paramString

 public String paramString()

Overrides:: paramString in class ComponentEvent

All Packages  Class Hierarchy  This Package  Previous  Next  Index

Submit a bug or feature