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java.lang.Object java.util.EventObject java.awt.AWTEvent java.awt.event.ComponentEvent java.awt.event.WindowEvent
A low-level event that indicates that a window has changed its status. This low-level event is generated by a Window object when it is opened, closed, activated, deactivated, iconified, or deiconified, or when focus is transfered into or out of the Window.
The event is passed to every WindowListener
or WindowAdapter
object which registered to receive such
events using the window's addWindowListener
method.
(WindowAdapter
objects implement the
WindowListener
interface.) Each such listener object
gets this WindowEvent
when the event occurs.
WindowAdapter
,
WindowListener
,
Tutorial: Writing a Window Listener,
Reference: The Java Class Libraries (update file),
Serialized FormField Summary | |
static int |
WINDOW_ACTIVATED
The window-activated event type. |
static int |
WINDOW_CLOSED
The window closed event. |
static int |
WINDOW_CLOSING
The "window is closing" event. |
static int |
WINDOW_DEACTIVATED
The window-deactivated event type. |
static int |
WINDOW_DEICONIFIED
The window deiconified event type. |
static int |
WINDOW_FIRST
The first number in the range of ids used for window events. |
static int |
WINDOW_GAINED_FOCUS
The window-gained-focus event type. |
static int |
WINDOW_ICONIFIED
The window iconified event. |
static int |
WINDOW_LAST
The last number in the range of ids used for window events. |
static int |
WINDOW_LOST_FOCUS
The window-lost-focus event type. |
static int |
WINDOW_OPENED
The window opened event. |
Fields inherited from class java.awt.event.ComponentEvent |
COMPONENT_FIRST, COMPONENT_HIDDEN, COMPONENT_LAST, COMPONENT_MOVED, COMPONENT_RESIZED, COMPONENT_SHOWN |
Fields inherited from class java.util.EventObject |
source |
Constructor Summary | |
WindowEvent(Window source,
int id)
Constructs a WindowEvent object. |
|
WindowEvent(Window source,
int id,
Window opposite)
Constructs a WindowEvent object with the
specified opposite Window . |
Method Summary | |
Window |
getOppositeWindow()
Returns the other Window involved in this focus or activation change. |
Window |
getWindow()
Returns the originator of the event. |
String |
paramString()
Returns a parameter string identifying this event. |
Methods inherited from class java.awt.event.ComponentEvent |
getComponent |
Methods inherited from class java.awt.AWTEvent |
consume, getID, isConsumed, toString |
Methods inherited from class java.util.EventObject |
getSource |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
public static final int WINDOW_FIRST
public static final int WINDOW_OPENED
public static final int WINDOW_CLOSING
public static final int WINDOW_CLOSED
public static final int WINDOW_ICONIFIED
Frame.setIconImage(java.awt.Image)
,
Constant Field Valuespublic static final int WINDOW_DEICONIFIED
public static final int WINDOW_ACTIVATED
public static final int WINDOW_DEACTIVATED
public static final int WINDOW_GAINED_FOCUS
public static final int WINDOW_LOST_FOCUS
public static final int WINDOW_LAST
Constructor Detail |
public WindowEvent(Window source, int id, Window opposite)
WindowEvent
object with the
specified opposite Window
. The opposite
Window
is the other Window
involved in this focus or activation change.
For a WINDOW_ACTIVATED
or
WINDOW_GAINED_FOCUS
event, this is the
Window
that lost activation or focus.
For a WINDOW_DEACTIVATED
or
WINDOW_LOST_FOCUS
event, this is the
Window
that gained activation or focus.
If this focus change occurs with a native application, with a
Java application in a different VM, or with no other
Window
, then the opposite Window is null
.
Note that passing in an invalid id
results in
unspecified behavior.
source
- the Window
object that
originated the eventid
- WINDOW_ACTIVATED
,
WINDOW_DEACTIVATED
,
WINDOW_GAINED_FOCUS
,
or WINDOW_LOST_FOCUS
. It is
expected that this constructor will not be used for
other WindowEvent
types because the
opposite Window
of such events
will always be null
opposite
- the other Window
involved in the
focus or activation change, or null
public WindowEvent(Window source, int id)
WindowEvent
object.
Note that passing in an invalid id
results in
unspecified behavior.
source
- the Window
object that originated the eventid
- an integer indicating the type of eventMethod Detail |
public Window getWindow()
public Window getOppositeWindow()
public String paramString()
paramString
in class ComponentEvent
|
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