Class WindowEvent
java.lang.Object
java.util.EventObject
java.awt.AWTEvent
java.awt.event.ComponentEvent
java.awt.event.WindowEvent
- All Implemented Interfaces:
- Serializable
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
 transferred 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.
 
 An unspecified behavior will be caused if the id parameter
 of any particular WindowEvent instance is not
 in the range from WINDOW_FIRST to WINDOW_LAST.
- Since:
- 1.1
- See Also:
- 
Field SummaryFieldsModifier and TypeFieldDescriptionstatic final intThe window-activated event type.static final intThe window closed event.static final intThe "window is closing" event.static final intThe window-deactivated event type.static final intThe window deiconified event type.static final intThe first number in the range of ids used for window events.static final intThe window-gained-focus event type.static final intThe window iconified event.static final intThe last number in the range of ids used for window events.static final intThe window-lost-focus event type.static final intThe window opened event.static final intThe window-state-changed event type.Fields declared in class java.awt.event.ComponentEventCOMPONENT_FIRST, COMPONENT_HIDDEN, COMPONENT_LAST, COMPONENT_MOVED, COMPONENT_RESIZED, COMPONENT_SHOWNFields declared in class java.awt.AWTEventACTION_EVENT_MASK, ADJUSTMENT_EVENT_MASK, COMPONENT_EVENT_MASK, consumed, CONTAINER_EVENT_MASK, FOCUS_EVENT_MASK, HIERARCHY_BOUNDS_EVENT_MASK, HIERARCHY_EVENT_MASK, id, INPUT_METHOD_EVENT_MASK, INVOCATION_EVENT_MASK, ITEM_EVENT_MASK, KEY_EVENT_MASK, MOUSE_EVENT_MASK, MOUSE_MOTION_EVENT_MASK, MOUSE_WHEEL_EVENT_MASK, PAINT_EVENT_MASK, RESERVED_ID_MAX, TEXT_EVENT_MASK, WINDOW_EVENT_MASK, WINDOW_FOCUS_EVENT_MASK, WINDOW_STATE_EVENT_MASKFields declared in class java.util.EventObjectsource
- 
Constructor SummaryConstructorsConstructorDescriptionWindowEvent(Window source, int id) Constructs aWindowEventobject.WindowEvent(Window source, int id, int oldState, int newState) Constructs aWindowEventobject with the specified previous and new window states.WindowEvent(Window source, int id, Window opposite) Constructs aWindowEventobject with the specified oppositeWindow.WindowEvent(Window source, int id, Window opposite, int oldState, int newState) Constructs aWindowEventobject.
- 
Method SummaryModifier and TypeMethodDescriptionintForWINDOW_STATE_CHANGEDevents returns the new state of the window.intForWINDOW_STATE_CHANGEDevents returns the previous state of the window.Returns the other Window involved in this focus or activation change.Returns the originator of the event.Returns a parameter string identifying this event.Methods declared in class java.awt.event.ComponentEventgetComponentMethods declared in class java.util.EventObjectgetSource
- 
Field Details- 
WINDOW_FIRSTpublic static final int WINDOW_FIRSTThe first number in the range of ids used for window events.- See Also:
 
- 
WINDOW_OPENEDThe window opened event. This event is delivered only the first time a window is made visible.- See Also:
 
- 
WINDOW_CLOSINGThe "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.- See Also:
 
- 
WINDOW_CLOSEDThe window closed event. This event is delivered after the displayable window has been closed as the result of a call to dispose.- See Also:
 
- 
WINDOW_ICONIFIEDThe 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.- See Also:
 
- 
WINDOW_DEICONIFIEDThe window deiconified event type. This event is delivered when the window has been changed from a minimized to a normal state.- See Also:
 
- 
WINDOW_ACTIVATEDThe 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.- See Also:
 
- 
WINDOW_DEACTIVATEDThe 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.- See Also:
 
- 
WINDOW_GAINED_FOCUSThe 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.- See Also:
 
- 
WINDOW_LOST_FOCUSThe 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.- See Also:
 
- 
WINDOW_STATE_CHANGEDThe window-state-changed event type. This event is delivered when a Window's state is changed by virtue of it being iconified, maximized etc.- Since:
- 1.4
- See Also:
 
- 
WINDOW_LASTpublic static final int WINDOW_LASTThe last number in the range of ids used for window events.- See Also:
 
 
- 
- 
Constructor Details- 
WindowEventConstructs aWindowEventobject.This method throws an IllegalArgumentExceptionifsourceisnull.- Parameters:
- source- The- Windowobject 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- #getOldState()for allowable values
- newState- New state of the window for window state change event. See- #getNewState()for allowable values
- Throws:
- IllegalArgumentException- if- sourceis null
- Since:
- 1.4
- See Also:
 
- 
WindowEventConstructs aWindowEventobject with the specified oppositeWindow. The oppositeWindowis the otherWindowinvolved in this focus or activation change. For aWINDOW_ACTIVATEDorWINDOW_GAINED_FOCUSevent, this is theWindowthat lost activation or focus. For aWINDOW_DEACTIVATEDorWINDOW_LOST_FOCUSevent, this is theWindowthat gained activation or focus. If this focus change occurs with a native application, with a Java application in a different VM, or with no otherWindow, then the opposite Window isnull.This method throws an IllegalArgumentExceptionifsourceisnull.- Parameters:
- source- The- Windowobject 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- WINDOW_ACTIVATED,- WINDOW_DEACTIVATED,- WINDOW_GAINED_FOCUS, or- WINDOW_LOST_FOCUS.- WindowEventtypes, because the opposite- Windowof other event types will always be- null.
- opposite- The other- Windowinvolved in the focus or activation change, or- null
- Throws:
- IllegalArgumentException- if- sourceis null
- Since:
- 1.4
- See Also:
 
- 
WindowEventConstructs aWindowEventobject with the specified previous and new window states.This method throws an IllegalArgumentExceptionifsourceisnull.- Parameters:
- source- The- Windowobject 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- WINDOW_STATE_CHANGED- WindowEventtypes, because the previous and new window states are meaningless for other event types.
- oldState- An integer representing the previous window state. See- #getOldState()for allowable values
- newState- An integer representing the new window state. See- #getNewState()for allowable values
- Throws:
- IllegalArgumentException- if- sourceis null
- Since:
- 1.4
- See Also:
 
- 
WindowEventConstructs aWindowEventobject.This method throws an IllegalArgumentExceptionifsourceisnull.- Parameters:
- source- The- Windowobject 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- sourceis null
- See Also:
 
 
- 
- 
Method Details- 
getWindowReturns the originator of the event.- Returns:
- the Window object that originated the event
 
- 
getOppositeWindowReturns 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.- Returns:
- the other Window involved in the focus or activation change, or null
- Since:
- 1.4
 
- 
getOldStatepublic int getOldState()ForWINDOW_STATE_CHANGEDevents 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_HORIZand- MAXIMIZED_VERT.
 - Returns:
- a bitwise mask of the previous window state
- Since:
- 1.4
- See Also:
 
- 
getNewStatepublic int getNewState()ForWINDOW_STATE_CHANGEDevents 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_HORIZand- MAXIMIZED_VERT.
 - Returns:
- a bitwise mask of the new window state
- Since:
- 1.4
- See Also:
 
- 
paramStringReturns a parameter string identifying this event. This method is useful for event-logging and for debugging.- Overrides:
- paramStringin class- ComponentEvent
- Returns:
- a string identifying the event and its attributes
 
 
-