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JavaTM 2 Platform Standard Ed. 5.0 |
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java.lang.Objectjava.awt.Component
java.awt.Container
java.awt.Window
public class Window
A Window object is a top-level window with no borders and no
menubar.
The default layout for a window is BorderLayout.
A window must have either a frame, dialog, or another window defined as its owner when it's constructed.
In a multi-screen environment, you can create a Window
on a different screen device by constructing the Window
with Window(Window, GraphicsConfiguration). The
GraphicsConfiguration object is one of the
GraphicsConfiguration objects of the target screen device.
In a virtual device multi-screen environment in which the desktop area could span multiple physical screen devices, the bounds of all configurations are relative to the virtual device coordinate system. The origin of the virtual-coordinate system is at the upper left-hand corner of the primary physical screen. Depending on the location of the primary screen in the virtual device, negative coordinates are possible, as shown in the following figure.
In such an environment, when calling setLocation,
you must pass a virtual coordinate to this method. Similarly,
calling getLocationOnScreen on a Window returns
virtual device coordinates. Call the getBounds method
of a GraphicsConfiguration to find its origin in the virtual
coordinate system.
The following code sets the location of a Window
at (10, 10) relative to the origin of the physical screen
of the corresponding GraphicsConfiguration. If the
bounds of the GraphicsConfiguration is not taken
into account, the Window location would be set
at (10, 10) relative to the virtual-coordinate system and would appear
on the primary physical screen, which might be different from the
physical screen of the specified GraphicsConfiguration.
Window w = new Window(Window owner, GraphicsConfiguration gc);
Rectangle bounds = gc.getBounds();
w.setLocation(10 + bounds.x, 10 + bounds.y);
Note: the location and size of top-level windows (including
Windows, Frames, and Dialogs)
are under the control of the desktop's window management system.
Calls to setLocation, setSize, and
setBounds are requests (not directives) which are
forwarded to the window management system. Every effort will be
made to honor such requests. However, in some cases the window
management system may ignore such requests, or modify the requested
geometry in order to place and size the Window in a way
that more closely matches the desktop settings.
Due to the asynchronous nature of native event handling, the results
returned by getBounds, getLocation,
getLocationOnScreen, and getSize might not
reflect the actual geometry of the Window on screen until the last
request has been processed. During the processing of subsequent
requests these values might change accordingly while the window
management system fulfills the requests.
Windows are capable of generating the following WindowEvents: WindowOpened, WindowClosed, WindowGainedFocus, WindowLostFocus.
WindowEvent,
addWindowListener(java.awt.event.WindowListener),
BorderLayout,
Serialized Form| Nested Class Summary | |
|---|---|
protected class |
Window.AccessibleAWTWindow
This class implements accessibility support for the Window class. |
| Nested classes/interfaces inherited from class java.awt.Container |
|---|
Container.AccessibleAWTContainer |
| Nested classes/interfaces inherited from class java.awt.Component |
|---|
Component.AccessibleAWTComponent, Component.BltBufferStrategy, Component.FlipBufferStrategy |
| Field Summary |
|---|
| Fields inherited from class java.awt.Component |
|---|
BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT |
| Fields inherited from interface java.awt.image.ImageObserver |
|---|
ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH |
| Constructor Summary | |
|---|---|
Window(Frame owner)
Constructs a new invisible window with the specified Frame as its owner. |
|
Window(Window owner)
Constructs a new invisible window with the specified Window as its owner. |
|
Window(Window owner,
GraphicsConfiguration gc)
Constructs a new invisible window with the specified window as its owner and a GraphicsConfiguration of a screen device. |
|
| Method Summary | ||
|---|---|---|
void |
addNotify()
Makes this Window displayable by creating the connection to its native screen resource. |
|
void |
addPropertyChangeListener(PropertyChangeListener listener)
Adds a PropertyChangeListener to the listener list. |
|
void |
addPropertyChangeListener(String propertyName,
PropertyChangeListener listener)
Adds a PropertyChangeListener to the listener list for a specific property. |
|
void |
addWindowFocusListener(WindowFocusListener l)
Adds the specified window focus listener to receive window events from this window. |
|
void |
addWindowListener(WindowListener l)
Adds the specified window listener to receive window events from this window. |
|
void |
addWindowStateListener(WindowStateListener l)
Adds the specified window state listener to receive window events from this window. |
|
void |
applyResourceBundle(ResourceBundle rb)
Deprecated. As of J2SE 1.4, replaced by Component.applyComponentOrientation. |
|
void |
applyResourceBundle(String rbName)
Deprecated. As of J2SE 1.4, replaced by Component.applyComponentOrientation. |
|
void |
createBufferStrategy(int numBuffers)
Creates a new strategy for multi-buffering on this component. |
|
void |
createBufferStrategy(int numBuffers,
BufferCapabilities caps)
Creates a new strategy for multi-buffering on this component with the required buffer capabilities. |
|
void |
dispose()
Releases all of the native screen resources used by this Window, its subcomponents, and all of its owned
children. |
|
protected void |
finalize()
Disposes of the input methods and context, and removes this Window from the GUI hierarchy. |
|
AccessibleContext |
getAccessibleContext()
Gets the AccessibleContext associated with this Window. |
|
BufferStrategy |
getBufferStrategy()
|
|
boolean |
getFocusableWindowState()
Returns whether this Window can become the focused Window if it meets the other requirements outlined in isFocusableWindow. |
|
Container |
getFocusCycleRootAncestor()
Always returns null because Windows have no ancestors; they
represent the top of the Component hierarchy. |
|
Component |
getFocusOwner()
Returns the child Component of this Window that has focus if this Window is focused; returns null otherwise. |
|
Set<AWTKeyStroke> |
getFocusTraversalKeys(int id)
Gets a focus traversal key for this Window. |
|
GraphicsConfiguration |
getGraphicsConfiguration()
This method returns the GraphicsConfiguration used by this Window. |
|
InputContext |
getInputContext()
Gets the input context for this window. |
|
|
getListeners(Class<T> listenerType)
Returns an array of all the objects currently registered as FooListeners
upon this Window. |
|
Locale |
getLocale()
Gets the Locale object that is associated
with this window, if the locale has been set. |
|
Component |
getMostRecentFocusOwner()
Returns the child Component of this Window that will receive the focus when this Window is focused. |
|
Window[] |
getOwnedWindows()
Return an array containing all the windows this window currently owns. |
|
Window |
getOwner()
Returns the owner of this window. |
|
Toolkit |
getToolkit()
Returns the toolkit of this frame. |
|
String |
getWarningString()
Gets the warning string that is displayed with this window. |
|
WindowFocusListener[] |
getWindowFocusListeners()
Returns an array of all the window focus listeners registered on this window. |
|
WindowListener[] |
getWindowListeners()
Returns an array of all the window listeners registered on this window. |
|
WindowStateListener[] |
getWindowStateListeners()
Returns an array of all the window state listeners registered on this window. |
|
void |
hide()
Deprecated. As of JDK 5, replaced by Component.setVisible(boolean). |
|
boolean |
isActive()
Returns whether this Window is active. |
|
boolean |
isAlwaysOnTop()
Returns whether this window is an always-on-top window. |
|
boolean |
isFocusableWindow()
Returns whether this Window can become the focused Window, that is, whether this Window or any of its subcomponents can become the focus owner. |
|
boolean |
isFocusCycleRoot()
Always returns true because all Windows must be roots of a
focus traversal cycle. |
|
boolean |
isFocused()
Returns whether this Window is focused. |
|
boolean |
isLocationByPlatform()
Returns true if this Window will appear at the default location
for the native windowing system the next time this Window is made visible. |
|
boolean |
isShowing()
Checks if this Window is showing on screen. |
|
void |
pack()
Causes this Window to be sized to fit the preferred size and layouts of its subcomponents. |
|
boolean |
postEvent(Event e)
Deprecated. As of JDK version 1.1 replaced by dispatchEvent(AWTEvent). |
|
protected void |
processEvent(AWTEvent e)
Processes events on this window. |
|
protected void |
processWindowEvent(WindowEvent e)
Processes window events occurring on this window by dispatching them to any registered WindowListener objects. |
|
protected void |
processWindowFocusEvent(WindowEvent e)
Processes window focus event occuring on this window by dispatching them to any registered WindowFocusListener objects. |
|
protected void |
processWindowStateEvent(WindowEvent e)
Processes window state event occuring on this window by dispatching them to any registered WindowStateListener
objects. |
|
void |
removeWindowFocusListener(WindowFocusListener l)
Removes the specified window focus listener so that it no longer receives window events from this window. |
|
void |
removeWindowListener(WindowListener l)
Removes the specified window listener so that it no longer receives window events from this window. |
|
void |
removeWindowStateListener(WindowStateListener l)
Removes the specified window state listener so that it no longer receives window events from this window. |
|
void |
setAlwaysOnTop(boolean alwaysOnTop)
Changes the always-on-top window state. |
|
void |
setBounds(int x,
int y,
int width,
int height)
Moves and resizes this component. |
|
void |
setCursor(Cursor cursor)
Set the cursor image to a specified cursor. |
|
void |
setFocusableWindowState(boolean focusableWindowState)
Sets whether this Window can become the focused Window if it meets the other requirements outlined in isFocusableWindow. |
|
void |
setFocusCycleRoot(boolean focusCycleRoot)
Does nothing because Windows must always be roots of a focus traversal cycle. |
|
void |
setLocationByPlatform(boolean locationByPlatform)
Sets whether this Window should appear at the default location for the native windowing system or at the current location (returned by getLocation) the next time the Window is made visible. |
|
void |
setLocationRelativeTo(Component c)
Sets the location of the window relative to the specified component. |
|
void |
show()
Deprecated. As of JDK 5, replaced by Component.setVisible(boolean). |
|
void |
toBack()
If this Window is visible, sends this Window to the back and may cause it to lose focus or activation if it is the focused or active Window. |
|
void |
toFront()
If this Window is visible, brings this Window to the front and may make it the focused Window. |
|
| Methods inherited from class java.lang.Object |
|---|
clone, equals, getClass, hashCode, notify, notifyAll, wait, wait, wait |
| Constructor Detail |
|---|
public Window(Frame owner)
Frame as its owner. The Window will not be focusable
unless its owner is showing on the screen.
If there is a security manager, this method first calls
the security manager's checkTopLevelWindow
method with this
as its argument to determine whether or not the window
must be displayed with a warning banner.
owner - the Frame to act as owner
IllegalArgumentException - if the owner's
GraphicsConfiguration is not from a screen device
IllegalArgumentException - if
owner is null; this exception
is always thrown when GraphicsEnvironment.isHeadless
returns trueGraphicsEnvironment.isHeadless(),
SecurityManager.checkTopLevelWindow(java.lang.Object),
isShowing()public Window(Window owner)
Window as its owner. The Window will not be focusable
unless its nearest owning Frame or Dialog is showing on the screen.
If there is a security manager, this method first calls
the security manager's checkTopLevelWindow
method with this
as its argument to determine whether or not the window
must be displayed with a warning banner.
owner - the Window to act as owner
IllegalArgumentException - if the owner's
GraphicsConfiguration is not from a screen device
IllegalArgumentException - if owner
is null. This exception is always thrown
when GraphicsEnvironment.isHeadless() returns true.GraphicsEnvironment.isHeadless(),
SecurityManager.checkTopLevelWindow(java.lang.Object),
isShowing()
public Window(Window owner,
GraphicsConfiguration gc)
GraphicsConfiguration of a screen device. The Window will
not be focusable unless its nearest owning Frame or Dialog is showing on
the screen.
If there is a security manager, this method first calls
the security manager's checkTopLevelWindow
method with this
as its argument to determine whether or not the window
must be displayed with a warning banner.
owner - the window to act as ownergc - the GraphicsConfiguration
of the target screen device; if gc is
null, the system default
GraphicsConfiguration is assumed
IllegalArgumentException - if
owner is null
IllegalArgumentException - if gc is not from
a screen device; this exception is always thrown when
GraphicsEnvironment.isHeadless returns
trueGraphicsEnvironment.isHeadless(),
SecurityManager.checkTopLevelWindow(java.lang.Object),
GraphicsConfiguration.getBounds(),
isShowing()| Method Detail |
|---|
protected void finalize()
throws Throwable
finalize in class ObjectThrowable - the Exception raised by this methodpublic void addNotify()
addNotify in class ContainerComponent.isDisplayable(),
Container.removeNotify()public void pack()
Component.isDisplayable()@Deprecated public void show()
Component.setVisible(boolean).
show in class Component@Deprecated public void hide()
Component.setVisible(boolean).
hide in class Componentpublic void dispose()
Window, its subcomponents, and all of its owned
children. That is, the resources for these Components
will be destroyed, any memory they consume will be returned to the
OS, and they will be marked as undisplayable.
The Window and its subcomponents can be made displayable
again by rebuilding the native resources with a subsequent call to
pack or show. The states of the recreated
Window and its subcomponents will be identical to the
states of these objects at the point where the Window
was disposed (not accounting for additional modifications between
those actions).
Note: When the last displayable window within the Java virtual machine (VM) is disposed of, the VM may terminate. See AWT Threading Issues for more information.
Component.isDisplayable(),
pack(),
show()public void toFront()
Places this Window at the top of the stacking order and shows it in front of any other Windows in this VM. No action will take place if this Window is not visible. Some platforms do not allow Windows which own other Windows to appear on top of those owned Windows. Some platforms may not permit this VM to place its Windows above windows of native applications, or Windows of other VMs. This permission may depend on whether a Window in this VM is already focused. Every attempt will be made to move this Window as high as possible in the stacking order; however, developers should not assume that this method will move this Window above all other windows in every situation.
Because of variations in native windowing systems, no guarantees about changes to the focused and active Windows can be made. Developers must never assume that this Window is the focused or active Window until this Window receives a WINDOW_GAINED_FOCUS or WINDOW_ACTIVATED event. On platforms where the top-most window is the focused window, this method will probably focus this Window, if it is not already focused. On platforms where the stacking order does not typically affect the focused window, this method will probably leave the focused and active Windows unchanged.
If this method causes this Window to be focused, and this Window is a Frame or a Dialog, it will also become activated. If this Window is focused, but it is not a Frame or a Dialog, then the first Frame or Dialog that is an owner of this Window will be activated.
toBack()public void toBack()
Places this Window at the bottom of the stacking order and shows it behind any other Windows in this VM. No action will take place is this Window is not visible. Some platforms do not allow Windows which are owned by other Windows to appear below their owners. Every attempt will be made to move this Window as low as possible in the stacking order; however, developers should not assume that this method will move this Window below all other windows in every situation.
Because of variations in native windowing systems, no guarantees about changes to the focused and active Windows can be made. Developers must never assume that this Window is no longer the focused or active Window until this Window receives a WINDOW_LOST_FOCUS or WINDOW_DEACTIVATED event. On platforms where the top-most window is the focused window, this method will probably cause this Window to lose focus. In that case, the next highest, focusable Window in this VM will receive focus. On platforms where the stacking order does not typically affect the focused window, this method will probably leave the focused and active Windows unchanged.
toFront()public Toolkit getToolkit()
getToolkit in class ComponentToolkit,
Toolkit.getDefaultToolkit(),
Component.getToolkit()public final String getWarningString()
checkTopLevelWindow method returns
false when this window is passed to it as an
argument.
If the window is secure, then getWarningString
returns null. If the window is insecure, this
method checks for the system property
awt.appletWarning
and returns the string value of that property.
SecurityManager.checkTopLevelWindow(java.lang.Object)public Locale getLocale()
Locale object that is associated
with this window, if the locale has been set.
If no locale has been set, then the default locale
is returned.
getLocale in class ComponentLocalepublic InputContext getInputContext()
getInputContext in class Componentnull if no context can be determinedComponent.getInputContext()public void setCursor(Cursor cursor)
setCursor in class Componentcursor - One of the constants defined
by the Cursor class. If this parameter is null
then the cursor for this window will be set to the type
Cursor.DEFAULT_CURSOR.Component.getCursor(),
Cursorpublic Window getOwner()
public Window[] getOwnedWindows()
public void addWindowListener(WindowListener l)
l - the window listenerremoveWindowListener(java.awt.event.WindowListener),
getWindowListeners()public void addWindowStateListener(WindowStateListener l)
l is null,
no exception is thrown and no action is performed.
l - the window state listenerremoveWindowStateListener(java.awt.event.WindowStateListener),
getWindowStateListeners()public void addWindowFocusListener(WindowFocusListener l)
l - the window focus listenerremoveWindowFocusListener(java.awt.event.WindowFocusListener),
getWindowFocusListeners()public void removeWindowListener(WindowListener l)
l - the window listeneraddWindowListener(java.awt.event.WindowListener),
getWindowListeners()public void removeWindowStateListener(WindowStateListener l)
l is null, no exception is thrown and
no action is performed.
l - the window state listeneraddWindowStateListener(java.awt.event.WindowStateListener),
getWindowStateListeners()public void removeWindowFocusListener(WindowFocusListener l)
l - the window focus listeneraddWindowFocusListener(java.awt.event.WindowFocusListener),
getWindowFocusListeners()public WindowListener[] getWindowListeners()
WindowListeners
or an empty array if no window
listeners are currently registeredaddWindowListener(java.awt.event.WindowListener),
removeWindowListener(java.awt.event.WindowListener)public WindowFocusListener[] getWindowFocusListeners()
WindowFocusListeners
or an empty array if no window focus
listeners are currently registeredaddWindowFocusListener(java.awt.event.WindowFocusListener),
removeWindowFocusListener(java.awt.event.WindowFocusListener)public WindowStateListener[] getWindowStateListeners()
WindowStateListeners
or an empty array if no window state
listeners are currently registeredaddWindowStateListener(java.awt.event.WindowStateListener),
removeWindowStateListener(java.awt.event.WindowStateListener)public <T extends EventListener> T[] getListeners(Class<T> listenerType)
FooListeners
upon this Window.
FooListeners are registered using the
addFooListener method.
You can specify the listenerType argument
with a class literal, such as
FooListener.class.
For example, you can query a
Window w
for its window listeners with the following code:
WindowListener[] wls = (WindowListener[])(w.getListeners(WindowListener.class));If no such listeners exist, this method returns an empty array.
getListeners in class ContainerlistenerType - the type of listeners requested; this parameter
should specify an interface that descends from
java.util.EventListener
FooListeners on this window,
or an empty array if no such
listeners have been added
ClassCastException - if listenerType
doesn't specify a class or interface that implements
java.util.EventListenergetWindowListeners()protected void processEvent(AWTEvent e)
WindowEvent, it invokes the
processWindowEvent method, else it invokes its
superclass's processEvent.
Note that if the event parameter is null
the behavior is unspecified and may result in an
exception.
processEvent in class Containere - the eventComponent.processComponentEvent(java.awt.event.ComponentEvent),
Component.processFocusEvent(java.awt.event.FocusEvent),
Component.processKeyEvent(java.awt.event.KeyEvent),
Component.processMouseEvent(java.awt.event.MouseEvent),
Component.processMouseMotionEvent(java.awt.event.MouseEvent),
Component.processInputMethodEvent(java.awt.event.InputMethodEvent),
Component.processHierarchyEvent(java.awt.event.HierarchyEvent),
Component.processMouseWheelEvent(java.awt.event.MouseWheelEvent)protected void processWindowEvent(WindowEvent e)
addWindowListener
enableEvents
Note that if the event parameter is null
the behavior is unspecified and may result in an
exception.
e - the window eventComponent.enableEvents(long)protected void processWindowFocusEvent(WindowEvent e)
addWindowFocusListener
enableEvents
Note that if the event parameter is null
the behavior is unspecified and may result in an
exception.
e - the window focus eventComponent.enableEvents(long)protected void processWindowStateEvent(WindowEvent e)
WindowStateListener
objects.
NOTE: this method will not be called unless window state events
are enabled for this window. This happens when one of the
following occurs:
WindowStateListener is registered via
addWindowStateListener
enableEvents
Note that if the event parameter is null
the behavior is unspecified and may result in an
exception.
e - the window state eventComponent.enableEvents(long)
public final void setAlwaysOnTop(boolean alwaysOnTop)
throws SecurityException
If some other window already is always-on-top then the relative order between these windows is unspecified (depends on platform). No window can be brought to be over always-on-top window except maybe another always-on-top window.
All owned windows of an always-on-top window automatically become always-on-top windows. If a window ceases to be always-on-top its owned windows cease to be always-on-top.
When an always-on-top window is sent toBack
its always-on-top state is set to false.
This method makes the window always-on-top if
alwaysOnTop is true. If the window is
visible, this includes bringing window toFront, then
"sticking" it to the top-most position. If the window is not
visible it does nothing other than setting the always-on-top
property. If later the window is shown, it will be always-on-top.
If the Window is already always-on-top, this call does nothing.
If alwaysOnTop is false this
method changes the state from always-on-top to normal. The window
remains top-most but its z-order can be changed in the normal way
as for any other window. Does nothing if this Window is not
always-on-top. Has no effect on relative z-order of windows if
there are no other always-on-top windows.
Note: some platforms might not support always-on-top windows. There is no public API to detect if the platform supports always-on-top at runtime.
If a SecurityManager is installed, the calling thread must be granted the AWTPermission "setWindowAlwaysOnTop" in order to set the value of this property. If this permission is not granted, this method will throw a SecurityException, and the current value of the property will be left unchanged.
alwaysOnTop - new value of always-on-top state of the
window
SecurityException - if the calling thread does not have permission
to set the value of always-on-top propertyisAlwaysOnTop(),
toFront(),
toBack(),
AWTPermissionpublic final boolean isAlwaysOnTop()
true, if the window is in always-on-top state,
false otherwisesetAlwaysOnTop(boolean)public Component getFocusOwner()
getMostRecentFocusOwner(),
isFocused()public Component getMostRecentFocusOwner()
getFocusOwner(). If
this Window is not focused, then the child Component that most recently
requested focus will be returned. If no child Component has ever
requested focus, and this is a focusable Window, then this Window's
initial focusable Component is returned. If no child Component has ever
requested focus, and this is a non-focusable Window, null is returned.
getFocusOwner(),
isFocused(),
isFocusableWindow()public boolean isActive()
isFocused()public boolean isFocused()
If the focused Window is a Frame or a Dialog it is also the active Window. Otherwise, the active Window is the first Frame or Dialog that is an owner of the focused Window.
isActive()public Set<AWTKeyStroke> getFocusTraversalKeys(int id)
setFocusTraversalKeys for a full description of each key.)
If the traversal key has not been explicitly set for this Window, then this Window's parent's traversal key is returned. If the traversal key has not been explicitly set for any of this Window's ancestors, then the current KeyboardFocusManager's default traversal key is returned.
getFocusTraversalKeys in class Containerid - one of KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS,
KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS,
KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS, or
KeyboardFocusManager.DOWN_CYCLE_TRAVERSAL_KEYS
IllegalArgumentException - if id is not one of
KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS,
KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS,
KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS, or
KeyboardFocusManager.DOWN_CYCLE_TRAVERSAL_KEYSContainer.setFocusTraversalKeys(int, java.util.Set extends java.awt.AWTKeyStroke>),
KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS,
KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS,
KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS,
KeyboardFocusManager.DOWN_CYCLE_TRAVERSAL_KEYSpublic final void setFocusCycleRoot(boolean focusCycleRoot)
setFocusCycleRoot in class ContainerfocusCycleRoot - this value is ignoredisFocusCycleRoot(),
Container.setFocusTraversalPolicy(java.awt.FocusTraversalPolicy),
Container.getFocusTraversalPolicy()public final boolean isFocusCycleRoot()
true because all Windows must be roots of a
focus traversal cycle.
isFocusCycleRoot in class ContainertruesetFocusCycleRoot(boolean),
Container.setFocusTraversalPolicy(java.awt.FocusTraversalPolicy),
Container.getFocusTraversalPolicy()public final Container getFocusCycleRootAncestor()
null because Windows have no ancestors; they
represent the top of the Component hierarchy.
getFocusCycleRootAncestor in class ComponentnullContainer.isFocusCycleRoot()public final boolean isFocusableWindow()
true. For a Window which is not a Frame or
Dialog to be focusable, its focusable Window state must be set to
true, its nearest owning Frame or Dialog must be
showing on the screen, and it must contain at least one Component in
its focus traversal cycle. If any of these conditions is not met, then
neither this Window nor any of its subcomponents can become the focus
owner.
true if this Window can be the focused Window;
false otherwisegetFocusableWindowState(),
setFocusableWindowState(boolean),
isShowing(),
Component.isFocusable()public boolean getFocusableWindowState()
isFocusableWindow. If
this method returns false, then
isFocusableWindow will return false as well.
If this method returns true, then
isFocusableWindow may return true or
false depending upon the other requirements which must be
met in order for a Window to be focusable.
By default, all Windows have a focusable Window state of
true.
isFocusableWindow(),
setFocusableWindowState(boolean),
isShowing(),
Component.setFocusable(boolean)public void setFocusableWindowState(boolean focusableWindowState)
isFocusableWindow. If
this Window's focusable Window state is set to false, then
isFocusableWindow will return false. If this
Window's focusable Window state is set to true, then
isFocusableWindow may return true or
false depending upon the other requirements which must be
met in order for a Window to be focusable.
Setting a Window's focusability state to false is the
standard mechanism for an application to identify to the AWT a Window
which will be used as a floating palette or toolbar, and thus should be
a non-focusable Window.
Setting the focusability state on a visible Window
can have a delayed effect on some platforms the actual
change may happen only when the Window becomes
hidden and then visible again. To ensure consistent behavior
across platforms, set the Window's focusable state
when the WIndow is invisible and then show it.
focusableWindowState - whether this Window can be the focused
WindowisFocusableWindow(),
getFocusableWindowState(),
isShowing(),
Component.setFocusable(boolean)public void addPropertyChangeListener(PropertyChangeListener listener)
If listener is null, no exception is thrown and no action is performed.
addPropertyChangeListener in class Containerlistener - the PropertyChangeListener to be addedComponent.removePropertyChangeListener(java.beans.PropertyChangeListener),
addPropertyChangeListener(java.lang.String,java.beans.PropertyChangeListener)
public void addPropertyChangeListener(String propertyName,
PropertyChangeListener listener)
If listener is null, no exception is thrown and no action is performed.
addPropertyChangeListener in class ContainerpropertyName - one of the property names listed abovelistener - the PropertyChangeListener to be addedaddPropertyChangeListener(java.beans.PropertyChangeListener),
Component.removePropertyChangeListener(java.beans.PropertyChangeListener)@Deprecated public boolean postEvent(Event e)
dispatchEvent(AWTEvent).
postEvent in interface MenuContainerpostEvent in class Componentpublic boolean isShowing()
isShowing in class Componenttrue if the component is showing,
false otherwiseComponent.setVisible(boolean)@Deprecated public void applyResourceBundle(ResourceBundle rb)
Component.applyComponentOrientation.
@Deprecated public void applyResourceBundle(String rbName)
Component.applyComponentOrientation.
public AccessibleContext getAccessibleContext()
getAccessibleContext in interface AccessiblegetAccessibleContext in class Componentpublic GraphicsConfiguration getGraphicsConfiguration()
getGraphicsConfiguration in class ComponentGraphicsConfiguration used by this
Component or nullpublic void setLocationRelativeTo(Component c)
c is null, the
window is centered on the screen. If the bottom of the
component is offscreen, the window is placed to the
side of the Component that is closest
to the center of the screen. So if the
Component is on the right part of the
screen, the Window is placed to its left,
and visa versa.
c - the component in relation to which the window's location
is determinedpublic void createBufferStrategy(int numBuffers)
BufferStrategy
with that number of buffers.
A page-flipping strategy is attempted first, then a blitting strategy
using accelerated buffers. Finally, an unaccelerated blitting
strategy is used.
Each time this method is called, the existing buffer strategy for this component is discarded.
numBuffers - number of buffers to create
IllegalArgumentException - if numBuffers is less than 1.
IllegalStateException - if the component is not displayableComponent.isDisplayable(),
getBufferStrategy()
public void createBufferStrategy(int numBuffers,
BufferCapabilities caps)
throws AWTException
Each time this method is called, the existing buffer strategy for this component is discarded.
numBuffers - number of buffers to create, including the front buffercaps - the required capabilities for creating the buffer strategy;
cannot be null
AWTException - if the capabilities supplied could not be
supported or met; this may happen, for example, if there is not enough
accelerated memory currently available, or if page flipping is specified
but not possible.
IllegalArgumentException - if numBuffers is less than 1, or if
caps is nullgetBufferStrategy()public BufferStrategy getBufferStrategy()
createBufferStrategy(int)public void setLocationByPlatform(boolean locationByPlatform)
getLocation) the next time the Window is made visible.
This behavior resembles a native window shown without programmatically
setting its location. Most windowing systems cascade windows if their
locations are not explicitly set. The actual location is determined once the
window is shown on the screen.
This behavior can also be enabled by setting the System Property "java.awt.Window.locationByPlatform" to "true", though calls to this method take precedence.
Calls to setVisible, setLocation and
setBounds after calling setLocationByPlatform clear
this property of the Window.
For example, after the following code is executed:
The window will be shown at platform's default location andsetLocationByPlatform(true); setVisible(true); boolean flag = isLocationByPlatform();
flag will be false.
In the following sample:
The window will be shown at (10, 10) andsetLocationByPlatform(true); setLocation(10, 10); boolean flag = isLocationByPlatform(); setVisible(true);
flag will be
false.
locationByPlatform - true if this Window should appear
at the default location, false if at the current location
IllegalComponentStateException - if the window
is showing on screen and locationByPlatform is true.Component.setLocation(int, int),
isShowing(),
Component.setVisible(boolean),
isLocationByPlatform(),
System.getProperty(String)public boolean isLocationByPlatform()
true if this Window will appear at the default location
for the native windowing system the next time this Window is made visible.
This method always returns false if the Window is showing on the
screen.
setLocationByPlatform(boolean),
isShowing()
public void setBounds(int x,
int y,
int width,
int height)
Componentx and y, and the
new size is specified by width and height.
setBounds in class Componentx - the new x-coordinate of this componenty - the new y-coordinate of this componentwidth - the new width of this componentheight - the new height of this
componentsetLocationByPlatform(boolean),
isLocationByPlatform()
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Copyright 2004 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.