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.
An unspecified behavior will be caused if the {@code id} parameter
of any particular {@code WindowEvent} instance is not
in the range from {@code WINDOW_FIRST} to {@code WINDOW_LAST}.
Field Summary |
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public static final int | WINDOW_FIRST | The first number in the range of ids used for window events. |
public static final int | WINDOW_OPENED | The window opened event. This event is delivered only
the first time a window is made visible. |
public static final int | WINDOW_CLOSING | The "window is closing" event. This event is delivered when
the user attempts to close the window from the window's system menu.
If the program does not explicitly hide or dispose the window
while processing this event, the window close operation will be
cancelled. |
public static final int | WINDOW_CLOSED | The window closed event. This event is delivered after
the window has been closed as the result of a call to dispose. |
public static final int | WINDOW_ICONIFIED | The window iconified event. This event is delivered when
the window has been changed from a normal to a minimized state.
For many platforms, a minimized window is displayed as
the icon specified in the window's iconImage property.Also see:
- java.awt.Frame#setIconImage
|
public static final int | WINDOW_DEICONIFIED | The window deiconified event type. This event is delivered when
the window has been changed from a minimized to a normal state. |
public static final int | WINDOW_ACTIVATED | The window-activated event type. This event is delivered when the Window
becomes the active Window. Only a Frame or a Dialog can be the active
Window. The native windowing system may denote the active Window or its
children with special decorations, such as a highlighted title bar. The
active Window is always either the focused Window, or the first Frame or
Dialog that is an owner of the focused Window. |
public static final int | WINDOW_DEACTIVATED | The window-deactivated event type. This event is delivered when the
Window is no longer the active Window. Only a Frame or a Dialog can be
the active Window. The native windowing system may denote the active
Window or its children with special decorations, such as a highlighted
title bar. The active Window is always either the focused Window, or the
first Frame or Dialog that is an owner of the focused Window. |
public static final int | WINDOW_GAINED_FOCUS | The window-gained-focus event type. This event is delivered when the
Window becomes the focused Window, which means that the Window, or one
of its subcomponents, will receive keyboard events. |
public static final int | WINDOW_LOST_FOCUS | The window-lost-focus event type. This event is delivered when a Window
is no longer the focused Window, which means keyboard events will no
longer be delivered to the Window or any of its subcomponents. |
public static final int | WINDOW_STATE_CHANGED | The window-state-changed event type. This event is delivered
when a Window's state is changed by virtue of it being
iconified, maximized etc. |
public static final int | WINDOW_LAST | The last number in the range of ids used for window events. |
transient Window | opposite | 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. For any other
type of WindowEvent, or if the focus or activation change occurs with a
native application, a Java application in a different VM, or with no
other Window, null is returned. |
int | oldState | TBS |
int | newState | |
Fields inherited from java.awt.AWTEvent: |
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id, consumed, focusManagerIsDispatching, isPosted, COMPONENT_EVENT_MASK, CONTAINER_EVENT_MASK, FOCUS_EVENT_MASK, KEY_EVENT_MASK, MOUSE_EVENT_MASK, MOUSE_MOTION_EVENT_MASK, WINDOW_EVENT_MASK, ACTION_EVENT_MASK, ADJUSTMENT_EVENT_MASK, ITEM_EVENT_MASK, TEXT_EVENT_MASK, INPUT_METHOD_EVENT_MASK, INPUT_METHODS_ENABLED_MASK, PAINT_EVENT_MASK, INVOCATION_EVENT_MASK, HIERARCHY_EVENT_MASK, HIERARCHY_BOUNDS_EVENT_MASK, MOUSE_WHEEL_EVENT_MASK, WINDOW_STATE_EVENT_MASK, WINDOW_FOCUS_EVENT_MASK, RESERVED_ID_MAX |
Constructor: |
public WindowEvent(Window source,
int id) {
this(source, id, null, 0, 0);
}
Parameters:
source - The Window object that originated the event
id - An integer indicating the type of event.
For information on allowable values, see
the class description for WindowEvent .
Throws:
IllegalArgumentException - if source is null
Also see:
- getWindow()
- getID()
|
public WindowEvent(Window source,
int id,
Window opposite) {
this(source, id, opposite, 0, 0);
}
Parameters:
source - The Window object that
originated the event
id - An integer indicating the type of event.
For information on allowable values, see
the class description for WindowEvent .
It is expected that this constructor will not
be used for other then
{@code WINDOW_ACTIVATED},{@code WINDOW_DEACTIVATED},
{@code WINDOW_GAINED_FOCUS}, or {@code WINDOW_LOST_FOCUS}.
{@code WindowEvent} types,
because the opposite Window of other event types
will always be {@code null}.
opposite - The other Window involved in the
focus or activation change, or null
Throws:
IllegalArgumentException - if source is null
Also see:
- getWindow()
- getID()
- getOppositeWindow()
- since:
1.4 -
|
public WindowEvent(Window source,
int id,
int oldState,
int newState) {
this(source, id, null, oldState, newState);
}
Parameters:
source - The Window object
that originated the event
id - An integer indicating the type of event.
For information on allowable values, see
the class description for WindowEvent .
It is expected that this constructor will not
be used for other then
{@code WINDOW_STATE_CHANGED}
{@code WindowEvent}
types, because the previous and new window
states are meaningless for other event types.
oldState - An integer representing the previous window state.
See {@code #getOldState()} for allowable values
newState - An integer representing the new window state.
See {@code #getNewState()} for allowable values
Throws:
IllegalArgumentException - if source is null
Also see:
- getWindow()
- getID()
- getOldState()
- getNewState()
- since:
1.4 -
|
public WindowEvent(Window source,
int id,
Window opposite,
int oldState,
int newState) {
super(source, id);
this.opposite = opposite;
this.oldState = oldState;
this.newState = newState;
}
Parameters:
source - The Window object
that originated the event
id - An integer indicating the type of event.
For information on allowable values, see
the class description for WindowEvent
opposite - The other window involved in the focus or activation
change, or null
oldState - Previous state of the window for window state change event.
See {@code #getOldState()} for allowable values
newState - New state of the window for window state change event.
See {@code #getNewState()} for allowable values
Throws:
IllegalArgumentException - if source is null
Also see:
- getWindow()
- getID()
- getOppositeWindow()
- getOldState()
- getNewState()
- since:
1.4 -
|
Methods from java.lang.Object: |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Method from java.awt.event.WindowEvent Detail: |
public int getNewState() {
return newState;
}
For WINDOW_STATE_CHANGED events returns the
new state of the window. The state is
represented as a bitwise mask.
NORMAL
Indicates that no state bits are set.
ICONIFIED
MAXIMIZED_HORIZ
MAXIMIZED_VERT
MAXIMIZED_BOTH
Concatenates MAXIMIZED_HORIZ
and MAXIMIZED_VERT .
|
public int getOldState() {
return oldState;
}
For WINDOW_STATE_CHANGED events returns the
previous state of the window. The state is
represented as a bitwise mask.
NORMAL
Indicates that no state bits are set.
ICONIFIED
MAXIMIZED_HORIZ
MAXIMIZED_VERT
MAXIMIZED_BOTH
Concatenates MAXIMIZED_HORIZ
and MAXIMIZED_VERT .
|
public Window getOppositeWindow() {
if (opposite == null) {
return null;
}
return (SunToolkit.targetToAppContext(opposite) ==
AppContext.getAppContext())
? opposite
: null;
}
Returns 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. For any other type of WindowEvent, or if the focus or activation
change occurs with a native application, with a Java application in a
different VM or context, or with no other Window, null is returned. |
public Window getWindow() {
return (source instanceof Window) ? (Window)source : null;
}
Returns the originator of the event. |
public String paramString() {
String typeStr;
switch(id) {
case WINDOW_OPENED:
typeStr = "WINDOW_OPENED";
break;
case WINDOW_CLOSING:
typeStr = "WINDOW_CLOSING";
break;
case WINDOW_CLOSED:
typeStr = "WINDOW_CLOSED";
break;
case WINDOW_ICONIFIED:
typeStr = "WINDOW_ICONIFIED";
break;
case WINDOW_DEICONIFIED:
typeStr = "WINDOW_DEICONIFIED";
break;
case WINDOW_ACTIVATED:
typeStr = "WINDOW_ACTIVATED";
break;
case WINDOW_DEACTIVATED:
typeStr = "WINDOW_DEACTIVATED";
break;
case WINDOW_GAINED_FOCUS:
typeStr = "WINDOW_GAINED_FOCUS";
break;
case WINDOW_LOST_FOCUS:
typeStr = "WINDOW_LOST_FOCUS";
break;
case WINDOW_STATE_CHANGED:
typeStr = "WINDOW_STATE_CHANGED";
break;
default:
typeStr = "unknown type";
}
typeStr += ",opposite=" + getOppositeWindow()
+ ",oldState=" + oldState + ",newState=" + newState;
return typeStr;
}
Returns a parameter string identifying this event.
This method is useful for event-logging and for debugging. |