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java.lang.Object | +--java.awt.Component
Safe:
| Field Summary | |
(package private) AccessibleContext |
accessibleContext
|
(package private) static String |
actionListenerK
Internal, constants for serialization |
(package private) static String |
adjustmentListenerK
|
(package private) sun.awt.AppContext |
appContext
The AppContext of the component. |
(package private) Color |
background
The background color for this component. |
static float |
BOTTOM_ALIGNMENT
Enabled: Ease-of-use constant for getAlignmentY. |
(package private) java.awt.image.BufferStrategy |
bufferStrategy
A reference to a BufferStrategy object
used to manipulate the buffers on this component. |
static float |
CENTER_ALIGNMENT
Enabled: Ease-of-use constant for getAlignmentY and
getAlignmentX. |
private java.beans.PropertyChangeSupport |
changeSupport
If any PropertyChangeListeners have been registered,
the changeSupport field describes them. |
(package private) ComponentListener |
componentListener
|
(package private) static String |
componentListenerK
|
(package private) ComponentOrientation |
componentOrientation
The orientation for this component. |
private int |
componentSerializedDataVersion
Component Serialized Data Version. |
(package private) static String |
containerListenerK
|
(package private) Cursor |
cursor
The cursor displayed when pointer is over this component. |
private static sun.awt.DebugHelper |
dbg
|
(package private) DropTarget |
dropTarget
The DropTarget associated with this component. |
(package private) boolean |
enabled
True when the object is enabled. |
(package private) long |
eventMask
The eventMask is ONLY set by subclasses via
enableEvents. |
private static int |
FOCUS_TRAVERSABLE_DEFAULT
|
private static int |
FOCUS_TRAVERSABLE_SET
|
private static int |
FOCUS_TRAVERSABLE_UNKNOWN
|
private boolean |
focusable
Indicates whether this Component can be focused. |
(package private) FocusListener |
focusListener
|
(package private) static String |
focusListenerK
|
private static String[] |
focusTraversalKeyPropertyNames
|
(package private) Set[] |
focusTraversalKeys
The focus traversal keys. |
private boolean |
focusTraversalKeysEnabled
Indicates whether focus traversal keys are enabled for this Component. |
(package private) Font |
font
The font used by this component. |
(package private) Color |
foreground
The foreground color for this component. |
(package private) GraphicsConfiguration |
graphicsConfig
A reference to a GraphicsConfiguration object
used to describe the characteristics of a graphics
destination. |
(package private) int |
height
The height of the component. |
(package private) HierarchyBoundsListener |
hierarchyBoundsListener
|
(package private) static String |
hierarchyBoundsListenerK
|
(package private) HierarchyListener |
hierarchyListener
|
(package private) static String |
hierarchyListenerK
|
(package private) boolean |
ignoreRepaint
True when the object should ignore all repaint events. |
(package private) static int |
incRate
|
(package private) InputMethodListener |
inputMethodListener
|
(package private) static String |
inputMethodListenerK
|
private int |
isFocusTraversableOverridden
Tracks whether this Component is relying on default focus travesability. |
(package private) static boolean |
isInc
Static properties for incremental drawing. |
(package private) boolean |
isPacked
|
(package private) static String |
itemListenerK
|
(package private) KeyListener |
keyListener
|
(package private) static String |
keyListenerK
|
static float |
LEFT_ALIGNMENT
Enabled: Ease-of-use constant for getAlignmentX. |
(package private) Locale |
locale
The locale for the component. |
(package private) static Object |
LOCK
The locking object for AWT component-tree and layout operations. |
(package private) static Hashtable |
metrics
saves an internal cache of FontMetrics for better performance |
(package private) Dimension |
minSize
Internal, cached size information. |
(package private) MouseListener |
mouseListener
|
(package private) static String |
mouseListenerK
|
(package private) MouseMotionListener |
mouseMotionListener
|
(package private) static String |
mouseMotionListenerK
|
(package private) MouseWheelListener |
mouseWheelListener
|
(package private) static String |
mouseWheelListenerK
|
private String |
name
A component's name. |
private boolean |
nameExplicitlySet
A bool to determine whether the name has been set explicitly. |
(package private) boolean |
newEventsOnly
newEventsOnly will be true if the event is
one of the event types enabled for the component. |
(package private) static String |
ownedWindowK
|
(package private) Container |
parent
The parent of the object. |
(package private) java.awt.peer.ComponentPeer |
peer
The peer of the component. |
(package private) Font |
peerFont
The font which the peer is currently using. |
(package private) Vector |
popups
|
(package private) Dimension |
prefSize
Internal, cached size information (This field perhaps should have been transient). |
private Object |
privateKey
This object is used as a key for internal hashtables. |
static float |
RIGHT_ALIGNMENT
Enabled: Ease-of-use constant for getAlignmentX. |
private static long |
serialVersionUID
|
(package private) static String |
textListenerK
|
static float |
TOP_ALIGNMENT
Enabled: Ease-of-use constant for getAlignmentY(). |
(package private) boolean |
valid
True when the object is valid. |
(package private) boolean |
visible
True when the object is visible. |
(package private) int |
width
The width of the component. |
(package private) RuntimeException |
windowClosingException
|
(package private) static String |
windowFocusListenerK
|
(package private) static String |
windowListenerK
|
(package private) static String |
windowStateListenerK
|
(package private) int |
x
The x position of the component in the parent's coordinate system. |
(package private) int |
y
The y position of the component in the parent's coordinate system. |
| Constructor Summary | |
protected |
Component()
Constructs a new component. |
| Method Summary | |
boolean |
action(Event evt,
Object what)
Suppressed: @deprecated As of JDK version 1.1, should register this component as ActionListener on component which fires action events. |
void |
add(PopupMenu popup)
Enabled: Adds the specified popup menu to the component. |
void |
addComponentListener(ComponentListener l)
Enabled: Adds the specified component listener to receive component events from this component. |
void |
addFocusListener(FocusListener l)
Suppressed: Adds the specified focus listener to receive focus events from this component when this component gains input focus. |
void |
addHierarchyBoundsListener(HierarchyBoundsListener l)
Suppressed: Adds the specified hierarchy bounds listener to receive hierarchy bounds events from this component when the hierarchy to which this container belongs changes. |
void |
addHierarchyListener(HierarchyListener l)
Suppressed: Adds the specified hierarchy listener to receive hierarchy changed events from this component when the hierarchy to which this container belongs changes. |
void |
addInputMethodListener(InputMethodListener l)
Suppressed: Adds the specified input method listener to receive input method events from this component. |
void |
addKeyListener(KeyListener l)
Enabled: Adds the specified key listener to receive key events from this component. |
void |
addMouseListener(MouseListener l)
Enabled: Adds the specified mouse listener to receive mouse events from this component. |
void |
addMouseMotionListener(MouseMotionListener l)
Enabled: Adds the specified mouse motion listener to receive mouse motion events from this component. |
void |
addMouseWheelListener(MouseWheelListener l)
Enabled: Adds the specified mouse wheel listener to receive mouse wheel events from this component. |
void |
addNotify()
Suppressed: Makes this Component displayable by connecting it to a
native screen resource. |
void |
addPropertyChangeListener(java.beans.PropertyChangeListener listener)
Suppressed: Adds a PropertyChangeListener to the listener list. |
void |
addPropertyChangeListener(String propertyName,
java.beans.PropertyChangeListener listener)
Suppressed: Adds a PropertyChangeListener to the listener list for a specific property. |
(package private) void |
adjustListeningChildrenOnParent(long mask,
int num)
|
void |
applyComponentOrientation(ComponentOrientation orientation)
Suppressed: Sets the ComponentOrientation property of this component
and all components contained within it. |
boolean |
areFocusTraversalKeysSet(int id)
Suppressed: Returns whether the Set of focus traversal keys for the given focus traversal operation has been explicitly defined for this Component. |
(package private) boolean |
areInputMethodsEnabled()
|
(package private) void |
autoProcessMouseWheel(MouseWheelEvent e)
|
(package private) void |
autoTransferFocus(boolean clearOnFailure)
|
Rectangle |
bounds()
Suppressed: @deprecated As of JDK version 1.1, replaced by getBounds(). |
(package private) void |
checkGD(String stringID)
Checks that this component's GraphicsDevice
idString matches the string argument. |
int |
checkImage(Image image,
java.awt.image.ImageObserver observer)
Suppressed: Returns the status of the construction of a screen representation of the specified image. |
int |
checkImage(Image image,
int width,
int height,
java.awt.image.ImageObserver observer)
Suppressed: Returns the status of the construction of a screen representation of the specified image. |
(package private) boolean |
checkWindowClosingException()
|
(package private) void |
clearCurrentFocusCycleRootOnHide()
|
(package private) void |
clearMostRecentFocusOwnerOnHide()
|
protected AWTEvent |
coalesceEvents(AWTEvent existingEvent,
AWTEvent newEvent)
Potentially coalesce an event being posted with an existing event. |
(package private) String |
constructComponentName()
Constructs a name for this component. |
boolean |
contains(int x,
int y)
Enabled: Checks whether this component "contains" the specified point, where x and y are defined to be
relative to the coordinate system of this component. |
boolean |
contains(Point p)
Suppressed: Checks whether this component "contains" the specified point, where the point's x and y coordinates are defined to be relative to the coordinate system of this component. |
(package private) boolean |
containsFocus()
|
(package private) int |
countHierarchyMembers()
|
(package private) void |
createBufferStrategy(int numBuffers)
Creates a new strategy for multi-buffering on this component. |
(package private) void |
createBufferStrategy(int numBuffers,
BufferCapabilities caps)
Creates a new strategy for multi-buffering on this component with the required buffer capabilities. |
(package private) void |
createChildHierarchyEvents(int id,
long changeFlags,
boolean enabledOnToolkit)
|
(package private) int |
createHierarchyEvents(int id,
Component changed,
Container changedParent,
long changeFlags,
boolean enabledOnToolkit)
|
Image |
createImage(java.awt.image.ImageProducer producer)
Enabled: Creates an image from the specified image producer. |
Image |
createImage(int width,
int height)
Enabled: Creates an off-screen drawable image to be used for double buffering. |
java.awt.image.VolatileImage |
createVolatileImage(int width,
int height)
Suppressed: Creates a volatile off-screen drawable image to be used for double buffering. |
java.awt.image.VolatileImage |
createVolatileImage(int width,
int height,
ImageCapabilities caps)
Suppressed: Creates a volatile off-screen drawable image, with the given capabilities. |
void |
deliverEvent(Event e)
Suppressed: @deprecated As of JDK version 1.1, replaced by dispatchEvent(AWTEvent e). |
void |
disable()
Suppressed: @deprecated As of JDK version 1.1, replaced by setEnabled(boolean). |
protected void |
disableEvents(long eventsToDisable)
Disables the events defined by the specified event mask parameter from being delivered to this component. |
void |
dispatchEvent(AWTEvent e)
Suppressed: Dispatches an event to this component or one of its sub components. |
(package private) void |
dispatchEventImpl(AWTEvent e)
|
(package private) boolean |
dispatchMouseWheelToAncestor(MouseWheelEvent e)
|
private void |
doAutoTransfer(boolean clearOnFailure)
|
void |
doLayout()
Suppressed: Prompts the layout manager to lay out this component. |
void |
enable()
Suppressed: @deprecated As of JDK version 1.1, replaced by setEnabled(boolean). |
void |
enable(boolean b)
Suppressed: @deprecated As of JDK version 1.1, replaced by setEnabled(boolean). |
protected void |
enableEvents(long eventsToEnable)
Enables the events defined by the specified event mask parameter to be delivered to this component. |
void |
enableInputMethods(boolean enable)
Suppressed: Enables or disables input method support for this component. |
(package private) boolean |
eventEnabled(AWTEvent e)
|
(package private) boolean |
eventTypeEnabled(int type)
|
protected void |
firePropertyChange(String propertyName,
boolean oldValue,
boolean newValue)
Support for reporting bound property changes for boolean properties. |
protected void |
firePropertyChange(String propertyName,
int oldValue,
int newValue)
Support for reporting bound property changes for integer properties. |
protected void |
firePropertyChange(String propertyName,
Object oldValue,
Object newValue)
Support for reporting bound property changes for Object properties. |
AccessibleContext |
getAccessibleContext()
Suppressed: Gets the AccessibleContext associated
with this Component. |
(package private) int |
getAccessibleIndexInParent()
Gets the index of this object in its accessible parent. |
(package private) AccessibleStateSet |
getAccessibleStateSet()
Gets the current state set of this object. |
float |
getAlignmentX()
Enabled: Returns the alignment along the x axis. |
float |
getAlignmentY()
Enabled: Returns the alignment along the y axis. |
(package private) Image |
getBackBuffer()
|
Color |
getBackground()
Enabled: Gets the background color of this component. |
Rectangle |
getBounds()
Enabled: Gets the bounds of this component in the form of a Rectangle object. |
Rectangle |
getBounds(Rectangle rv)
Suppressed: Stores the bounds of this component into "return value" rv and return rv. |
(package private) java.awt.image.BufferStrategy |
getBufferStrategy()
|
java.awt.image.ColorModel |
getColorModel()
Suppressed: Gets the instance of ColorModel used to display
the component on the output device. |
Component |
getComponentAt(int x,
int y)
Enabled: Determines if this component or one of its immediate subcomponents contains the (x, y) location, and if so, returns the containing component. |
Component |
getComponentAt(Point p)
Suppressed: Returns the component or subcomponent that contains the specified point. |
ComponentListener[] |
getComponentListeners()
Suppressed: Returns an array of all the component listeners registered on this component. |
ComponentOrientation |
getComponentOrientation()
Suppressed: Retrieves the language-sensitive orientation that is to be used to order the elements or text within this component. |
Cursor |
getCursor()
Enabled: Gets the cursor set in the component. |
DropTarget |
getDropTarget()
Enabled: Gets the DropTarget associated with this
Component. |
Container |
getFocusCycleRootAncestor()
Suppressed: Returns the Container which is the focus cycle root of this Component's focus traversal cycle. |
FocusListener[] |
getFocusListeners()
Suppressed: Returns an array of all the focus listeners registered on this component. |
(package private) Set |
getFocusTraversalKeys_NoIDCheck(int id)
|
Set |
getFocusTraversalKeys(int id)
Suppressed: Returns the Set of focus traversal keys for a given traversal operation for this Component. |
boolean |
getFocusTraversalKeysEnabled()
Suppressed: Returns whether focus traversal keys are enabled for this Component. |
(package private) Font |
getFont_NoClientCode()
|
Font |
getFont()
Enabled: Gets the font of this component. |
FontMetrics |
getFontMetrics(Font font)
Enabled: Gets the font metrics for the specified font. |
Color |
getForeground()
Enabled: Gets the foreground color of this component. |
Graphics |
getGraphics()
Enabled: Creates a graphics context for this component. |
GraphicsConfiguration |
getGraphicsConfiguration()
Suppressed: Gets the GraphicsConfiguration associated with this
Component. |
int |
getHeight()
Enabled: Returns the current height of this component. |
HierarchyBoundsListener[] |
getHierarchyBoundsListeners()
Suppressed: Returns an array of all the hierarchy bounds listeners registered on this component. |
HierarchyListener[] |
getHierarchyListeners()
Suppressed: Returns an array of all the hierarchy listeners registered on this component. |
boolean |
getIgnoreRepaint()
Suppressed: @return whether or not paint messages received from the operating system should be ignored. |
java.awt.im.InputContext |
getInputContext()
Suppressed: Gets the input context used by this component for handling the communication with input methods when text is entered in this component. |
InputMethodListener[] |
getInputMethodListeners()
Suppressed: Returns an array of all the input method listeners registered on this component. |
java.awt.im.InputMethodRequests |
getInputMethodRequests()
Suppressed: Gets the input method request handler which supports requests from input methods for this component. |
KeyListener[] |
getKeyListeners()
Suppressed: Returns an array of all the key listeners registered on this component. |
EventListener[] |
getListeners(Class listenerType)
Suppressed: Returns an array of all the objects currently registered as FooListeners
upon this Component. |
Locale |
getLocale()
Suppressed: Gets the locale of this component. |
Point |
getLocation()
Enabled: Gets the location of this component in the form of a point specifying the component's top-left corner. |
Point |
getLocation(Point rv)
Suppressed: Stores the x,y origin of this component into "return value" rv and return rv. |
(package private) Point |
getLocationOnScreen_NoTreeLock()
|
Point |
getLocationOnScreen()
Enabled: Gets the location of this component in the form of a point specifying the component's top-left corner in the screen's coordinate space. |
Dimension |
getMaximumSize()
Enabled: Gets the maximum size of this component. |
Dimension |
getMinimumSize()
Enabled: Gets the mininimum size of this component. |
MouseListener[] |
getMouseListeners()
Suppressed: Returns an array of all the mouse listeners registered on this component. |
MouseMotionListener[] |
getMouseMotionListeners()
Suppressed: Returns an array of all the mouse motion listeners registered on this component. |
MouseWheelListener[] |
getMouseWheelListeners()
Suppressed: Returns an array of all the mouse wheel listeners registered on this component. |
String |
getName()
Enabled: Gets the name of the component. |
(package private) Container |
getNativeContainer()
|
(package private) Container |
getParent_NoClientCode()
|
Container |
getParent()
Suppressed: Gets the parent of this component. |
java.awt.peer.ComponentPeer |
getPeer()
Suppressed: @deprecated As of JDK version 1.1, programs should not directly manipulate peers; replaced by boolean isDisplayable(). |
Dimension |
getPreferredSize()
Enabled: Gets the preferred size of this component. |
java.beans.PropertyChangeListener[] |
getPropertyChangeListeners()
Suppressed: Returns an array of all the property change listeners registered on this component. |
java.beans.PropertyChangeListener[] |
getPropertyChangeListeners(String propertyName)
Suppressed: Returns an array of all the listeners which have been associated with the named property. |
Dimension |
getSize()
Enabled: Returns the size of this component in the form of a Dimension object. |
Dimension |
getSize(Dimension rv)
Suppressed: Stores the width/height of this component into "return value" rv and return rv. |
Toolkit |
getToolkit()
Suppressed: Gets the toolkit of this component. |
(package private) Toolkit |
getToolkitImpl()
|
Object |
getTreeLock()
Suppressed: Gets this component's locking object (the object that owns the thread sychronization monitor) for AWT component-tree and layout operations. |
int |
getWidth()
Enabled: Returns the current width of this component. |
int |
getX()
Enabled: Returns the current x coordinate of the components origin. |
int |
getY()
Enabled: Returns the current y coordinate of the components origin. |
boolean |
gotFocus(Event evt,
Object what)
Suppressed: @deprecated As of JDK version 1.1, replaced by processFocusEvent(FocusEvent). |
boolean |
handleEvent(Event evt)
Suppressed: @deprecated As of JDK version 1.1 replaced by processEvent(AWTEvent). |
boolean |
hasFocus()
Enabled: Returns true if this Component is the
focus owner. |
void |
hide()
Suppressed: @deprecated As of JDK version 1.1, replaced by setVisible(boolean). |
boolean |
imageUpdate(Image img,
int infoflags,
int x,
int y,
int w,
int h)
Enabled: Repaints the component when the image has changed. |
(package private) void |
initializeFocusTraversalKeys()
|
private static void |
initIDs()
Initialize JNI field and method IDs |
boolean |
inside(int x,
int y)
Suppressed: @deprecated As of JDK version 1.1, replaced by contains(int, int). |
void |
invalidate()
Enabled: Invalidates this component. |
boolean |
isBackgroundSet()
Enabled: Returns whether the background color has been explicitly set for this Component. |
boolean |
isCursorSet()
Enabled: Returns whether the cursor has been explicitly set for this Component. |
boolean |
isDisplayable()
Enabled: Determines whether this component is displayable. |
boolean |
isDoubleBuffered()
Enabled: Returns true if this component is painted to an offscreen image ("buffer") that's copied to the screen later. |
boolean |
isEnabled()
Enabled: Determines whether this component is enabled. |
(package private) boolean |
isEnabledImpl()
|
boolean |
isFocusable()
Suppressed: Returns whether this Component can be focused. |
boolean |
isFocusCycleRoot(Container container)
Suppressed: Returns whether the specified Container is the focus cycle root of this Component's focus traversal cycle. |
boolean |
isFocusOwner()
Suppressed: Returns true if this Component is the
focus owner. |
boolean |
isFocusTraversable()
Deprecated. As of 1.4, replaced by isFocusable(). |
(package private) boolean |
isFocusTraversableOverridden()
|
boolean |
isFontSet()
Enabled: Returns whether the font has been explicitly set for this Component. |
boolean |
isForegroundSet()
Enabled: Returns whether the foreground color has been explicitly set for this Component. |
boolean |
isLightweight()
Suppressed: A lightweight component doesn't have a native toolkit peer. |
boolean |
isOpaque()
Enabled: Returns true if this component is completely opaque, returns false by default. |
(package private) boolean |
isRecursivelyVisible()
Determines whether this component will be displayed on the screen if it's displayable. |
boolean |
isShowing()
Enabled: Determines whether this component is showing on screen. |
boolean |
isValid()
Enabled: Determines whether this component is valid. |
boolean |
isVisible()
Enabled: Determines whether this component should be visible when its parent is visible. |
void |
iterate(AssocFunc func)
Added: A Component enumerates no components, unless it's also a Container. |
boolean |
keyDown(Event evt,
int key)
Suppressed: @deprecated As of JDK version 1.1, replaced by processKeyEvent(KeyEvent). |
boolean |
keyUp(Event evt,
int key)
Suppressed: @deprecated As of JDK version 1.1, replaced by processKeyEvent(KeyEvent). |
void |
layout()
Suppressed: @deprecated As of JDK version 1.1, replaced by doLayout(). |
(package private) void |
lightweightPaint(Graphics g)
Simulates the peer callbacks into java.awt for painting of lightweight Components. |
(package private) void |
lightweightPrint(Graphics g)
Simulates the peer callbacks into java.awt for printing of lightweight Components. |
void |
list()
Suppressed: Prints a listing of this component to the standard system output stream System.out. |
void |
list(PrintStream out)
Suppressed: Prints a listing of this component to the specified output stream. |
void |
list(PrintStream out,
int indent)
Suppressed: Prints out a list, starting at the specified indentation, to the specified print stream. |
void |
list(PrintWriter out)
Suppressed: Prints a listing to the specified print writer. |
void |
list(PrintWriter out,
int indent)
Suppressed: Prints out a list, starting at the specified indentation, to the specified print writer. |
Component |
locate(int x,
int y)
Suppressed: @deprecated As of JDK version 1.1, replaced by getComponentAt(int, int). |
Point |
location()
Suppressed: @deprecated As of JDK version 1.1, replaced by getLocation(). |
boolean |
lostFocus(Event evt,
Object what)
Suppressed: @deprecated As of JDK version 1.1, replaced by processFocusEvent(FocusEvent). |
Dimension |
minimumSize()
Suppressed: @deprecated As of JDK version 1.1, replaced by getMinimumSize(). |
boolean |
mouseDown(Event evt,
int x,
int y)
Suppressed: @deprecated As of JDK version 1.1, replaced by processMouseEvent(MouseEvent). |
boolean |
mouseDrag(Event evt,
int x,
int y)
Suppressed: @deprecated As of JDK version 1.1, replaced by processMouseMotionEvent(MouseEvent). |
boolean |
mouseEnter(Event evt,
int x,
int y)
Suppressed: @deprecated As of JDK version 1.1, replaced by processMouseEvent(MouseEvent). |
boolean |
mouseExit(Event evt,
int x,
int y)
Suppressed: @deprecated As of JDK version 1.1, replaced by processMouseEvent(MouseEvent). |
boolean |
mouseMove(Event evt,
int x,
int y)
Suppressed: @deprecated As of JDK version 1.1, replaced by processMouseMotionEvent(MouseEvent). |
boolean |
mouseUp(Event evt,
int x,
int y)
Suppressed: @deprecated As of JDK version 1.1, replaced by processMouseEvent(MouseEvent). |
void |
move(int x,
int y)
Suppressed: @deprecated As of JDK version 1.1, replaced by setLocation(int, int). |
void |
nextFocus()
Suppressed: @deprecated As of JDK version 1.1, replaced by transferFocus(). |
(package private) boolean |
nextFocusHelper()
|
(package private) int |
numListening(long mask)
|
void |
paint(Graphics g)
Suppressed: Paints this component. |
void |
paintAll(Graphics g)
Suppressed: Paints this component and all of its subcomponents. |
(package private) void |
paintHeavyweightComponents(Graphics g)
Paints all the heavyweight subcomponents. |
protected String |
paramString()
Returns a string representing the state of this component. |
boolean |
postEvent(Event e)
Suppressed: @deprecated As of JDK version 1.1, replaced by dispatchEvent(AWTEvent). |
(package private) boolean |
postsOldMouseEvents()
|
Dimension |
preferredSize()
Suppressed: @deprecated As of JDK version 1.1, replaced by getPreferredSize(). |
boolean |
prepareImage(Image image,
java.awt.image.ImageObserver observer)
Suppressed: Prepares an image for rendering on this component. |
boolean |
prepareImage(Image image,
int width,
int height,
java.awt.image.ImageObserver observer)
Suppressed: Prepares an image for rendering on this component at the specified width and height. |
void |
print(Graphics g)
Suppressed: Prints this component. |
void |
printAll(Graphics g)
Suppressed: Prints this component and all of its subcomponents. |
(package private) void |
printHeavyweightComponents(Graphics g)
Prints all the heavyweight subcomponents. |
protected void |
processComponentEvent(ComponentEvent e)
Processes component events occurring on this component by dispatching them to any registered ComponentListener objects. |
protected void |
processEvent(AWTEvent e)
Processes events occurring on this component. |
protected void |
processFocusEvent(FocusEvent e)
Processes focus events occurring on this component by dispatching them to any registered FocusListener objects. |
protected void |
processHierarchyBoundsEvent(HierarchyEvent e)
Processes hierarchy bounds events occurring on this component by dispatching them to any registered HierarchyBoundsListener objects. |
protected void |
processHierarchyEvent(HierarchyEvent e)
Processes hierarchy events occurring on this component by dispatching them to any registered HierarchyListener objects. |
protected void |
processInputMethodEvent(InputMethodEvent e)
Processes input method events occurring on this component by dispatching them to any registered InputMethodListener objects. |
protected void |
processKeyEvent(KeyEvent e)
Processes key events occurring on this component by dispatching them to any registered KeyListener objects. |
protected void |
processMouseEvent(MouseEvent e)
Processes mouse events occurring on this component by dispatching them to any registered MouseListener objects. |
protected void |
processMouseMotionEvent(MouseEvent e)
Processes mouse motion events occurring on this component by dispatching them to any registered MouseMotionListener objects. |
protected void |
processMouseWheelEvent(MouseWheelEvent e)
Processes mouse wheel events occurring on this component by dispatching them to any registered MouseWheelListener objects. |
private void |
readObject(ObjectInputStream s)
Reads the ObjectInputStream and if it isn't
null adds a listener to receive a variety
of events fired by the component. |
void |
remove(MenuComponent popup)
Enabled: Removes the specified popup menu from the component. |
void |
removeComponentListener(ComponentListener l)
Enabled: Removes the specified component listener so that it no longer receives component events from this component. |
void |
removeFocusListener(FocusListener l)
Suppressed: Removes the specified focus listener so that it no longer receives focus events from this component. |
void |
removeHierarchyBoundsListener(HierarchyBoundsListener l)
Suppressed: Removes the specified hierarchy bounds listener so that it no longer receives hierarchy bounds events from this component. |
void |
removeHierarchyListener(HierarchyListener l)
Suppressed: Removes the specified hierarchy listener so that it no longer receives hierarchy changed events from this component. |
void |
removeInputMethodListener(InputMethodListener l)
Suppressed: Removes the specified input method listener so that it no longer receives input method events from this component. |
void |
removeKeyListener(KeyListener l)
Enabled: Removes the specified key listener so that it no longer receives key events from this component. |
void |
removeMouseListener(MouseListener l)
Enabled: Removes the specified mouse listener so that it no longer receives mouse events from this component. |
void |
removeMouseMotionListener(MouseMotionListener l)
Enabled: Removes the specified mouse motion listener so that it no longer receives mouse motion events from this component. |
void |
removeMouseWheelListener(MouseWheelListener l)
Enabled: Removes the specified mouse wheel listener so that it no longer receives mouse wheel events from this component. |
void |
removeNotify()
Suppressed: Makes this Component undisplayable by destroying it native
screen resource. |
void |
removePropertyChangeListener(java.beans.PropertyChangeListener listener)
Suppressed: Removes a PropertyChangeListener from the listener list. |
void |
removePropertyChangeListener(String propertyName,
java.beans.PropertyChangeListener listener)
Suppressed: Removes a PropertyChangeListener from the listener list for a specific property. |
void |
repaint()
Enabled: Repaints this component. |
void |
repaint(int x,
int y,
int width,
int height)
Enabled: Repaints the specified rectangle of this component. |
void |
repaint(long tm)
Suppressed: Repaints the component. |
void |
repaint(long tm,
int x,
int y,
int width,
int height)
Suppressed: Repaints the specified rectangle of this component within tm milliseconds. |
void |
requestFocus()
Suppressed: Requests that this Component get the input focus, and that this Component's top-level ancestor become the focused Window. |
protected boolean |
requestFocus(boolean temporary)
Requests that this Component get the input focus, and that this Component's top-level ancestor become the focused Window. |
(package private) boolean |
requestFocusHelper(boolean temporary,
boolean focusedWindowChangeAllowed)
|
boolean |
requestFocusInWindow()
Suppressed: Requests that this Component get the input focus, if this Component's top-level ancestor is already the focused Window. |
protected boolean |
requestFocusInWindow(boolean temporary)
Requests that this Component get the input focus, if this Component's top-level ancestor is already the focused Window. |
(package private) void |
resetGC()
Resets this Component's
GraphicsConfiguration back to a default
value. |
void |
reshape(int x,
int y,
int width,
int height)
Suppressed: @deprecated As of JDK version 1.1, replaced by setBounds(int, int, int, int). |
void |
resize(Dimension d)
Suppressed: @deprecated As of JDK version 1.1, replaced by setSize(Dimension). |
void |
resize(int width,
int height)
Suppressed: @deprecated As of JDK version 1.1, replaced by setSize(int, int). |
void |
setBackground(Color c)
Enabled: Sets the background color of this component. |
void |
setBounds(int x,
int y,
int width,
int height)
Enabled: Moves and resizes this component. |
void |
setBounds(Rectangle r)
Suppressed: Moves and resizes this component to conform to the new bounding rectangle r. |
void |
setComponentOrientation(ComponentOrientation o)
Suppressed: Sets the language-sensitive orientation that is to be used to order the elements or text within this component. |
void |
setCursor(Cursor cursor)
Enabled: Sets the cursor image to the specified cursor. |
void |
setDropTarget(DropTarget dt)
Enabled: Associate a DropTarget with this component. |
void |
setEnabled(boolean b)
Enabled: Enables or disables this component, depending on the value of the parameter b. |
void |
setFocusable(boolean focusable)
Suppressed: Sets the focusable state of this Component to the specified value. |
(package private) void |
setFocusTraversalKeys_NoIDCheck(int id,
Set keystrokes)
|
void |
setFocusTraversalKeys(int id,
Set keystrokes)
Suppressed: Sets the focus traversal keys for a given traversal operation for this Component. |
void |
setFocusTraversalKeysEnabled(boolean focusTraversalKeysEnabled)
Suppressed: Sets whether focus traversal keys are enabled for this Component. |
void |
setFont(Font f)
Enabled: Sets the font of this component. |
void |
setForeground(Color c)
Enabled: Sets the foreground color of this component. |
(package private) void |
setGCFromPeer()
|
void |
setIgnoreRepaint(boolean ignoreRepaint)
Suppressed: Sets whether or not paint messages received from the operating system should be ignored. |
void |
setLocale(Locale l)
Suppressed: Sets the locale of this component. |
void |
setLocation(int x,
int y)
Enabled: Moves this component to a new location. |
void |
setLocation(Point p)
Suppressed: Moves this component to a new location. |
void |
setName(String name)
Enabled: Sets the name of the component to the specified string. |
void |
setSize(Dimension d)
Suppressed: Resizes this component so that it has width d.width
and height d.height. |
void |
setSize(int width,
int height)
Enabled: Resizes this component so that it has width width
and height height. |
void |
setVisible(boolean b)
Enabled: Shows or hides this component depending on the value of parameter b. |
void |
show()
Suppressed: @deprecated As of JDK version 1.1, replaced by setVisible(boolean). |
void |
show(boolean b)
Suppressed: @deprecated As of JDK version 1.1, replaced by setVisible(boolean). |
Dimension |
size()
Suppressed: @deprecated As of JDK version 1.1, replaced by getSize(). |
String |
toString()
Suppressed: Returns a string representation of this component and its values. |
void |
transferFocus()
Suppressed: Transfers the focus to the next component, as though this Component were the focus owner. |
static boolean |
transferFocus(Component[] sources,
Component dest)
Added: If any of 'sources' currently has or contains the focus, then requests that 'dest' gets the focus. |
void |
transferFocusBackward()
Suppressed: Transfers the focus to the previous component, as though this Component were the focus owner. |
void |
transferFocusUpCycle()
Suppressed: Transfers the focus up one focus traversal cycle. |
void |
update(Graphics g)
Suppressed: Updates this component. |
(package private) void |
updateCursorImmediately()
Updates the cursor. |
void |
validate()
Enabled: Ensures that this component has a valid layout. |
private void |
writeObject(ObjectOutputStream s)
Writes default serializable fields to stream. |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
| Field Detail |
transient java.awt.peer.ComponentPeer peer
Component is
added to a container that also is a peer.
addNotify(),
removeNotify()transient Container parent
null
for top-level components.
getParent()transient sun.awt.AppContext appContext
AppContext of the component. This is set in
the constructor and never changes.
int x
getLocation()int y
getLocation()int width
getSize()int height
getSize()Color foreground
foreground can be null.
getForeground(),
setForeground(java.awt.Color)Color background
background can be null.
getBackground(),
setBackground(java.awt.Color)Font font
font can be null.
getFont(),
setFont(java.awt.Font)Font peerFont
null if no peer exists.)
Cursor cursor
null.
getCursor(),
setCursor(java.awt.Cursor)Locale locale
getLocale(),
setLocale(java.util.Locale)transient GraphicsConfiguration graphicsConfig
GraphicsConfiguration object
used to describe the characteristics of a graphics
destination.
This value can be null.
GraphicsConfiguration,
getGraphicsConfiguration()transient java.awt.image.BufferStrategy bufferStrategy
BufferStrategy object
used to manipulate the buffers on this component.
java.awt.image.BufferStrategy,
getBufferStrategy()boolean ignoreRepaint
setIgnoreRepaint(boolean),
getIgnoreRepaint()boolean visible
isVisible(),
setVisible(boolean)boolean enabled
isEnabled(),
setEnabled(boolean)boolean valid
isValid(),
validate(),
invalidate()DropTarget dropTarget
DropTarget associated with this component.
setDropTarget(java.awt.dnd.DropTarget),
getDropTarget()Vector popups
add(java.awt.PopupMenu)private String name
null.
getName(),
setName(String)private boolean nameExplicitlySet
nameExplicitlySet will
be false if the name has not been set and
true if it has.
getName(),
setName(String)private boolean focusable
setFocusable(boolean),
isFocusable()private static final int FOCUS_TRAVERSABLE_UNKNOWN
private static final int FOCUS_TRAVERSABLE_DEFAULT
private static final int FOCUS_TRAVERSABLE_SET
private int isFocusTraversableOverridden
isFocusTraversableOverriddenSet[] focusTraversalKeys
#setFocusTraversalKey,
#getFocusTraversalKeyprivate static final String[] focusTraversalKeyPropertyNames
private boolean focusTraversalKeysEnabled
setFocusTraversalKeysEnabled(boolean),
getFocusTraversalKeysEnabled()static final Object LOCK
getTreeLock()Dimension minSize
Dimension prefSize
transient ComponentOrientation componentOrientation
getComponentOrientation(),
setComponentOrientation(java.awt.ComponentOrientation)boolean newEventsOnly
newEventsOnly will be true if the event is
one of the event types enabled for the component.
It will then allow for normal processing to
continue. If it is false the event is passed
to the component's parent and up the ancestor
tree until the event has been consumed.
dispatchEvent(java.awt.AWTEvent)transient ComponentListener componentListener
transient FocusListener focusListener
transient HierarchyListener hierarchyListener
transient HierarchyBoundsListener hierarchyBoundsListener
transient KeyListener keyListener
transient MouseListener mouseListener
transient MouseMotionListener mouseMotionListener
transient MouseWheelListener mouseWheelListener
transient InputMethodListener inputMethodListener
transient RuntimeException windowClosingException
static final String actionListenerK
static final String adjustmentListenerK
static final String componentListenerK
static final String containerListenerK
static final String focusListenerK
static final String itemListenerK
static final String keyListenerK
static final String mouseListenerK
static final String mouseMotionListenerK
static final String mouseWheelListenerK
static final String textListenerK
static final String ownedWindowK
static final String windowListenerK
static final String inputMethodListenerK
static final String hierarchyListenerK
static final String hierarchyBoundsListenerK
static final String windowStateListenerK
static final String windowFocusListenerK
long eventMask
eventMask is ONLY set by subclasses via
enableEvents.
The mask should NOT be set when listeners are registered
so that we can distinguish the difference between when
listeners request events and subclasses request them.
One bit is used to indicate whether input methods are
enabled; this bit is set by enableInputMethods and is
on by default.
enableInputMethods(boolean),
AWTEventprivate static final sun.awt.DebugHelper dbg
static boolean isInc
imageUpdate(java.awt.Image, int, int, int, int, int)static int incRate
public static final float TOP_ALIGNMENT
getAlignmentY().
Specifies an alignment to the top of the component.
getAlignmentY()public static final float CENTER_ALIGNMENT
getAlignmentY and
getAlignmentX. Specifies an alignment to
the center of the component
getAlignmentX(),
getAlignmentY()public static final float BOTTOM_ALIGNMENT
getAlignmentY.
Specifies an alignment to the bottom of the component.
getAlignmentY()public static final float LEFT_ALIGNMENT
getAlignmentX.
Specifies an alignment to the left side of the component.
getAlignmentX()public static final float RIGHT_ALIGNMENT
getAlignmentX.
Specifies an alignment to the right side of the component.
getAlignmentX()private static final long serialVersionUID
private java.beans.PropertyChangeSupport changeSupport
PropertyChangeListeners have been registered,
the changeSupport field describes them.
addPropertyChangeListener(java.beans.PropertyChangeListener),
removePropertyChangeListener(java.beans.PropertyChangeListener),
firePropertyChange(java.lang.String, java.lang.Object, java.lang.Object)boolean isPacked
private transient Object privateKey
static Hashtable metrics
private int componentSerializedDataVersion
AccessibleContext accessibleContext
| Constructor Detail |
protected Component()
Component can be
extended directly to create a lightweight component that does not
utilize an opaque native window. A lightweight component must be
hosted by a native container somewhere higher up in the component
tree (for example, by a Frame object).
| Method Detail |
void initializeFocusTraversalKeys()
String constructComponentName()
getName
when the name is null.
public String getName()
setName(java.lang.String)public void setName(String name)
name - the string that is to be this
component's namegetName()public Container getParent()
final Container getParent_NoClientCode()
public java.awt.peer.ComponentPeer getPeer()
boolean isDisplayable().
public void setDropTarget(DropTarget dt)
DropTarget with this component.
The Component will receive drops only if it
is enabled.
dt - The DropTargetisEnabled()public DropTarget getDropTarget()
DropTarget associated with this
Component.
public GraphicsConfiguration getGraphicsConfiguration()
GraphicsConfiguration associated with this
Component.
If the Component has not been assigned a specific
GraphicsConfiguration,
the GraphicsConfiguration of the
Component object's top-level container is
returned.
If the Component has been created, but not yet added
to a Container, this method returns null.
GraphicsConfiguration used by this
Component or nullvoid resetGC()
Component's
GraphicsConfiguration back to a default
value. For most componenets, this is null.
Called from the Toolkit thread, so NO CLIENT CODE.
void setGCFromPeer()
void checkGD(String stringID)
GraphicsDevice
idString matches the string argument.
public final Object getTreeLock()
public Toolkit getToolkit()
final Toolkit getToolkitImpl()
public boolean isValid()
true if the component is valid, false
otherwisevalidate(),
invalidate()public boolean isDisplayable()
A component is made displayable either when it is added to a displayable containment hierarchy or when its containment hierarchy is made displayable. A containment hierarchy is made displayable when its ancestor window is either packed or made visible.
A component is made undisplayable either when it is removed from a displayable containment hierarchy or when its containment hierarchy is made undisplayable. A containment hierarchy is made undisplayable when its ancestor window is disposed.
true if the component is displayable,
false otherwiseContainer.add(Component),
Window.pack(),
Window.show(),
Container.remove(Component),
Window.dispose()public boolean isVisible()
Frame objects.
true if the component is visible,
false otherwisesetVisible(boolean)boolean isRecursivelyVisible()
true if the component and all of its ancestors
are visible, false otherwisepublic boolean isShowing()
true if the component is showing,
false otherwisesetVisible(boolean)public boolean isEnabled()
setEnabled method.
true if the component is enabled,
false otherwisesetEnabled(boolean)final boolean isEnabledImpl()
public void setEnabled(boolean b)
b. An enabled component can respond to user
input and generate events. Components are enabled initially by default.
Note: Disabling a lightweight component does not prevent it from receiving MouseEvents.
b - If true, this component is
enabled; otherwise this component is disabledisEnabled(),
isLightweight()public void enable()
setEnabled(boolean).
public void enable(boolean b)
setEnabled(boolean).
public void disable()
setEnabled(boolean).
public boolean isDoubleBuffered()
public void enableInputMethods(boolean enable)
enable - true to enable, false to disableprocessKeyEvent(java.awt.event.KeyEvent)public void setVisible(boolean b)
b.
b - if true, shows this component;
otherwise, hides this componentisVisible()public void show()
setVisible(boolean).
public void show(boolean b)
setVisible(boolean).
boolean containsFocus()
void clearMostRecentFocusOwnerOnHide()
void clearCurrentFocusCycleRootOnHide()
public void hide()
setVisible(boolean).
public Color getForeground()
setForeground(java.awt.Color)public void setForeground(Color c)
c - the color to become this component's
foreground color; if this parameter is null
then this component will inherit
the foreground color of its parentgetForeground()public boolean isForegroundSet()
false, this Component is
inheriting its foreground color from an ancestor.
true if the foreground color has been explicitly
set for this Component; false otherwise.public Color getBackground()
setBackground(java.awt.Color)public void setBackground(Color c)
The background color affects each component differently and the parts of the component that are affected by the background color may differ between operating systems.
c - the color to become this component's color;
if this parameter is null, then this
component will inherit the background color of its parentgetBackground()public boolean isBackgroundSet()
false, this Component is
inheriting its background color from an ancestor.
true if the background color has been explicitly
set for this Component; false otherwise.public Font getFont()
getFont in interface MenuContainersetFont(java.awt.Font)final Font getFont_NoClientCode()
public void setFont(Font f)
f - the font to become this component's font;
if this parameter is null then this
component will inherit the font of its parentgetFont()public boolean isFontSet()
false, this Component is inheriting its
font from an ancestor.
true if the font has been explicitly set for this
Component; false otherwise.public Locale getLocale()
setLocale(java.util.Locale)public void setLocale(Locale l)
l - the locale to become this component's localegetLocale()public java.awt.image.ColorModel getColorModel()
ColorModel used to display
the component on the output device.
java.awt.image.ColorModel,
java.awt.peer.ComponentPeer#getColorModel(),
Toolkit.getColorModel()public Point getLocation()
Due to the asynchronous nature of native event handling, this
method can return outdated values (for instance, after several calls
of setLocation() in rapid succession). For this
reason, the recommended method of obtaining a component's position is
within java.awt.event.ComponentListener.componentMoved(),
which is called after the operating system has finished moving the
component.
Point representing
the top-left corner of the component's bounds in
the coordinate space of the component's parentsetLocation(int, int),
getLocationOnScreen()public Point getLocationOnScreen()
Point representing
the top-left corner of the component's bounds in the
coordinate space of the screen
IllegalComponentStateExceptionsetLocation(int, int),
getLocation()final Point getLocationOnScreen_NoTreeLock()
public Point location()
getLocation().
public void setLocation(int x,
int y)
x and y
parameters in the coordinate space of this component's parent.
x - the x-coordinate of the new location's
top-left corner in the parent's coordinate spacey - the y-coordinate of the new location's
top-left corner in the parent's coordinate spacegetLocation(),
setBounds(int, int, int, int)
public void move(int x,
int y)
setLocation(int, int).
public void setLocation(Point p)
p. Point
p is given in the parent's coordinate space.
p - the point defining the top-left corner
of the new location, given in the coordinate space of this
component's parentgetLocation(),
setBounds(int, int, int, int)public Dimension getSize()
Dimension object. The height
field of the Dimension object contains
this component's height, and the width
field of the Dimension object contains
this component's width.
Dimension object that indicates the
size of this componentsetSize(int, int)public Dimension size()
getSize().
public void setSize(int width,
int height)
width
and height height.
width - the new width of this component in pixelsheight - the new height of this component in pixelsgetSize(),
setBounds(int, int, int, int)
public void resize(int width,
int height)
setSize(int, int).
public void setSize(Dimension d)
d.width
and height d.height.
d - the dimension specifying the new size
of this componentsetSize(int, int),
setBounds(int, int, int, int)public void resize(Dimension d)
setSize(Dimension).
public Rectangle getBounds()
Rectangle object. The bounds specify this
component's width, height, and location relative to
its parent.
setBounds(int, int, int, int),
getLocation(),
getSize()public Rectangle bounds()
getBounds().
public void setBounds(int x,
int y,
int width,
int height)
x and y, and the
new size is specified by width and height.
x - 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
componentgetBounds(),
setLocation(int, int),
setLocation(Point),
setSize(int, int),
setSize(Dimension)
public void reshape(int x,
int y,
int width,
int height)
setBounds(int, int, int, int).
public void setBounds(Rectangle r)
r. This component's new
position is specified by r.x and r.y,
and its new size is specified by r.width and
r.height
r - the new bounding rectangle for this componentgetBounds(),
setLocation(int, int),
setLocation(Point),
setSize(int, int),
setSize(Dimension)public int getX()
component.getBounds().x,
or component.getLocation().x because it doesn't
cause any heap allocations.
public int getY()
component.getBounds().y,
or component.getLocation().y because it
doesn't cause any heap allocations.
public int getWidth()
component.getBounds().width,
or component.getSize().width because it
doesn't cause any heap allocations.
public int getHeight()
component.getBounds().heightcomponent.getSize().height because it
doesn't cause any heap allocations.
public Rectangle getBounds(Rectangle rv)
null a new
Rectangle is allocated.
This version of getBounds is useful if the caller
wants to avoid allocating a new Rectangle object
on the heap.
rv - the return value, modified to the components bounds
public Dimension getSize(Dimension rv)
null a new
Dimension object is allocated. This version of
getSize is useful if the caller wants to avoid
allocating a new Dimension object on the heap.
rv - the return value, modified to the components size
public Point getLocation(Point rv)
null a new
Point is allocated.
This version of getLocation is useful if the
caller wants to avoid allocating a new Point
object on the heap.
rv - the return value, modified to the components location
public boolean isOpaque()
An opaque component paints every pixel within its rectangular region. A non-opaque component paints only some of its pixels, allowing the pixels underneath it to "show through". A component that does not fully paint its pixels therefore provides a degree of transparency. Only lightweight components can be transparent.
Subclasses that guarantee to always completely paint their contents should override this method and return true. All of the "heavyweight" AWT components are opaque.
isLightweight()public boolean isLightweight()
Component and Container,
other than the ones defined in this package like Button
or Scrollbar, are lightweight.
All of the Swing components are lightweights.
This method will always return false if this component
is not displayable because it is impossible to determine the
weight of an undisplayable component.
isDisplayable()public Dimension getPreferredSize()
getMinimumSize(),
LayoutManagerpublic Dimension preferredSize()
getPreferredSize().
public Dimension getMinimumSize()
getPreferredSize(),
LayoutManagerpublic Dimension minimumSize()
getMinimumSize().
public Dimension getMaximumSize()
getMinimumSize(),
getPreferredSize(),
LayoutManagerpublic float getAlignmentX()
public float getAlignmentY()
public void doLayout()
validate(),
LayoutManagerpublic void layout()
doLayout().
public void validate()
Container.
invalidate(),
doLayout(),
LayoutManager,
Container.validate()public void invalidate()
validate(),
doLayout(),
LayoutManagerpublic Graphics getGraphics()
null if this component is currently not
displayable.
null
if it has nonepaint(java.awt.Graphics)public FontMetrics getFontMetrics(Font font)
font - the font for which font metrics is to be
obtained
fontgetFont(),
getPeer(),
java.awt.peer.ComponentPeer#getFontMetrics(Font),
Toolkit.getFontMetrics(Font)public void setCursor(Cursor cursor)
contains method for
this component returns true for the current cursor location, and
this Component is visible, displayable, and enabled. Setting the
cursor of a Container causes that cursor to be displayed
within all of the container's subcomponents, except for those
that have a non-null cursor.
cursor - One of the constants defined
by the Cursor class;
if this parameter is null
then this component will inherit
the cursor of its parentisEnabled(),
isShowing(),
getCursor(),
contains(int, int),
Toolkit.createCustomCursor(java.awt.Image, java.awt.Point, java.lang.String),
Cursorfinal void updateCursorImmediately()
public Cursor getCursor()
Cursor.DEFAULT_CURSOR is returned.
setCursor(java.awt.Cursor)public boolean isCursorSet()
false, this Component is inheriting
its cursor from an ancestor.
true if the cursor has been explicitly set for this
Component; false otherwise.public void paint(Graphics g)
This method is called when the contents of the component should
be painted; such as when the component is first being shown or
is damaged and in need of repair. The clip rectangle in the
Graphics parameter is set to the area
which needs to be painted.
Subclasses of Component that override this
method need not call super.paint(g).
For performance reasons, Components with zero width
or height aren't considered to need painting when they are first shown,
and also aren't considered to need repair.
Note: For more information on the paint mechanisms utilitized by AWT and Swing, including information on how to write the most efficient painting code, see Painting in AWT and Swing.
g - the graphics context to use for paintingupdate(java.awt.Graphics)public void update(Graphics g)
If this component is not a lightweight component, the
AWT calls the update method in response to
a call to repaint. You can assume that
the background is not cleared.
The updatemethod of Component
calls this component's paint method to redraw
this component. This method is commonly overridden by subclasses
which need to do additional work in response to a call to
repaint.
Subclasses of Component that override this method should either
call super.update(g), or call paint directly.
The origin of the graphics context, its
(0, 0) coordinate point, is the
top-left corner of this component. The clipping region of the
graphics context is the bounding rectangle of this component.
Note: For more information on the paint mechanisms utilitized by AWT and Swing, including information on how to write the most efficient painting code, see Painting in AWT and Swing.
g - the specified context to use for updatingpaint(java.awt.Graphics),
repaint()public void paintAll(Graphics g)
The origin of the graphics context, its
(0, 0) coordinate point, is the
top-left corner of this component. The clipping region of the
graphics context is the bounding rectangle of this component.
g - the graphics context to use for paintingpaint(java.awt.Graphics)void lightweightPaint(Graphics g)
g - the graphics context to use for paintingpaintAll(java.awt.Graphics)void paintHeavyweightComponents(Graphics g)
public void repaint()
If this component is a lightweight component, this method
causes a call to this component's paint
method as soon as possible. Otherwise, this method causes
a call to this component's update method as soon
as possible.
Note: For more information on the paint mechanisms utilitized by AWT and Swing, including information on how to write the most efficient painting code, see Painting in AWT and Swing.
update(Graphics)public void repaint(long tm)
paint
within tm milliseconds.
Note: For more information on the paint mechanisms utilitized by AWT and Swing, including information on how to write the most efficient painting code, see Painting in AWT and Swing.
tm - maximum time in milliseconds before updatepaint(java.awt.Graphics),
update(Graphics)
public void repaint(int x,
int y,
int width,
int height)
If this component is a lightweight component, this method
causes a call to this component's paint method
as soon as possible. Otherwise, this method causes a call to
this component's update method as soon as possible.
Note: For more information on the paint mechanisms utilitized by AWT and Swing, including information on how to write the most efficient painting code, see Painting in AWT and Swing.
x - the x coordinatey - the y coordinatewidth - the widthheight - the heightupdate(Graphics)
public void repaint(long tm,
int x,
int y,
int width,
int height)
tm milliseconds.
If this component is a lightweight component, this method causes
a call to this component's paint method.
Otherwise, this method causes a call to this component's
update method.
Note: For more information on the paint mechanisms utilitized by AWT and Swing, including information on how to write the most efficient painting code, see Painting in AWT and Swing.
tm - maximum time in milliseconds before updatex - the x coordinatey - the y coordinatewidth - the widthheight - the heightupdate(Graphics)public void print(Graphics g)
The default implementation of this method calls the
paint method.
The origin of the graphics context, its
(0, 0) coordinate point, is the
top-left corner of this component. The clipping region of the
graphics context is the bounding rectangle of this component.
g - the graphics context to use for printingpaint(Graphics)public void printAll(Graphics g)
The origin of the graphics context, its
(0, 0) coordinate point, is the
top-left corner of this component. The clipping region of the
graphics context is the bounding rectangle of this component.
g - the graphics context to use for printingprint(Graphics)void lightweightPrint(Graphics g)
g - the graphics context to use for printingprintAll(java.awt.Graphics)void printHeavyweightComponents(Graphics g)
public boolean imageUpdate(Image img,
int infoflags,
int x,
int y,
int w,
int h)
imageUpdate method of an ImageObserver
is called when more information about an
image which had been previously requested using an asynchronous
routine such as the drawImage method of
Graphics becomes available.
See the definition of imageUpdate for
more information on this method and its arguments.
The imageUpdate method of Component
incrementally draws an image on the component as more of the bits
of the image are available.
If the system property awt.image.incrementaldraw
is missing or has the value true, the image is
incrementally drawn. If the system property has any other value,
then the image is not drawn until it has been completely loaded.
Also, if incremental drawing is in effect, the value of the
system property awt.image.redrawrate is interpreted
as an integer to give the maximum redraw rate, in milliseconds. If
the system property is missing or cannot be interpreted as an
integer, the redraw rate is once every 100ms.
The interpretation of the x, y,
width, and height arguments depends on
the value of the infoflags argument.
img - the image being observedinfoflags - see imageUpdate for more informationx - the x coordinatey - the y coordinatew - the widthh - the height
false if the infoflags indicate that the
image is completely loaded; true otherwise.java.awt.image.ImageObserver,
Graphics.drawImage(Image, int, int, Color, java.awt.image.ImageObserver),
Graphics.drawImage(Image, int, int, java.awt.image.ImageObserver),
Graphics.drawImage(Image, int, int, int, int, Color, java.awt.image.ImageObserver),
Graphics.drawImage(Image, int, int, int, int, java.awt.image.ImageObserver),
java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)public Image createImage(java.awt.image.ImageProducer producer)
producer - the image producer
public Image createImage(int width,
int height)
width - the specified widthheight - the specified height
null if the
component is not displayable. This will always happen if
GraphicsEnvironment.isHeadless() returns
true.isDisplayable(),
GraphicsEnvironment.isHeadless()
public java.awt.image.VolatileImage createVolatileImage(int width,
int height)
width - the specified width.height - the specified height.
null if the
component is not displayable. This will always happen if
GraphicsEnvironment.isHeadless() returns
true.java.awt.image.VolatileImage,
isDisplayable(),
GraphicsEnvironment.isHeadless()
public java.awt.image.VolatileImage createVolatileImage(int width,
int height,
ImageCapabilities caps)
throws AWTException
VolatileImage interface.
width - the specified width.height - the specified height.caps - the image capabilities
AWTExceptionjava.awt.image.VolatileImage
public boolean prepareImage(Image image,
java.awt.image.ImageObserver observer)
image - the Image for which to
prepare a screen representationobserver - the ImageObserver object
to be notified as the image is being prepared
true if the image has already been fully
prepared; false otherwise
public boolean prepareImage(Image image,
int width,
int height,
java.awt.image.ImageObserver observer)
The image data is downloaded asynchronously in another thread, and an appropriately scaled screen representation of the image is generated.
image - the instance of Image
for which to prepare a screen representationwidth - the width of the desired screen representationheight - the height of the desired screen representationobserver - the ImageObserver object
to be notified as the image is being prepared
true if the image has already been fully
prepared; false otherwisejava.awt.image.ImageObserver
public int checkImage(Image image,
java.awt.image.ImageObserver observer)
This method does not cause the image to begin loading. An
application must use the prepareImage method
to force the loading of an image.
Information on the flags returned by this method can be found
with the discussion of the ImageObserver interface.
image - the Image object whose status
is being checkedobserver - the ImageObserver
object to be notified as the image is being prepared
ImageObserver flags indicating what
information about the image is currently availableprepareImage(Image, int, int, java.awt.image.ImageObserver),
Toolkit.checkImage(Image, int, int, java.awt.image.ImageObserver),
java.awt.image.ImageObserver
public int checkImage(Image image,
int width,
int height,
java.awt.image.ImageObserver observer)
This method does not cause the image to begin loading. An
application must use the prepareImage method
to force the loading of an image.
The checkImage method of Component
calls its peer's checkImage method to calculate
the flags. If this component does not yet have a peer, the
component's toolkit's checkImage method is called
instead.
Information on the flags returned by this method can be found
with the discussion of the ImageObserver interface.
image - the Image object whose status
is being checkedwidth - the width of the scaled version
whose status is to be checkedheight - the height of the scaled version
whose status is to be checkedobserver - the ImageObserver object
to be notified as the image is being prepared
ImageObserver flags indicating what
information about the image is currently availableprepareImage(Image, int, int, java.awt.image.ImageObserver),
Toolkit.checkImage(Image, int, int, java.awt.image.ImageObserver),
java.awt.image.ImageObservervoid 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, including the front bufferisDisplayable(),
getBufferStrategy()
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 createcaps - the required capabilities for creating the buffer strategy;
cannot be null
AWTExceptiongetBufferStrategy()java.awt.image.BufferStrategy getBufferStrategy()
Window.createBufferStrategy(int),
Canvas.createBufferStrategy(int)Image getBackBuffer()
public void setIgnoreRepaint(boolean ignoreRepaint)
This is useful, for example, if running under full-screen mode and better performance is desired, or if page-flipping is used as the buffer strategy.
getIgnoreRepaint(),
Canvas.createBufferStrategy(int),
Window.createBufferStrategy(int),
java.awt.image.BufferStrategy,
GraphicsDevice.setFullScreenWindow(java.awt.Window)public boolean getIgnoreRepaint()
setIgnoreRepaint(boolean)
public boolean contains(int x,
int y)
x and y are defined to be
relative to the coordinate system of this component.
x - the x coordinate of the pointy - the y coordinate of the pointgetComponentAt(int, int)
public boolean inside(int x,
int y)
public boolean contains(Point p)
p - the pointgetComponentAt(Point)
public Component getComponentAt(int x,
int y)
The locate method of Component simply
returns the component itself if the (x, y)
coordinate location is inside its bounding box, and null
otherwise.
x - the x coordinatey - the y coordinate
null if the location
is outside this componentcontains(int, int)
public Component locate(int x,
int y)
public Component getComponentAt(Point p)
p - the pointjava.awt.Component#containspublic void deliverEvent(Event e)
dispatchEvent(AWTEvent e).
public final void dispatchEvent(AWTEvent e)
processEvent before returning for 1.1-style
events which have been enabled for the Component.
e - the eventvoid dispatchEventImpl(AWTEvent e)
void autoProcessMouseWheel(MouseWheelEvent e)
boolean dispatchMouseWheelToAncestor(MouseWheelEvent e)
boolean checkWindowClosingException()
boolean areInputMethodsEnabled()
boolean eventEnabled(AWTEvent e)
boolean eventTypeEnabled(int type)
public boolean postEvent(Event e)
postEvent in interface MenuContainerpublic void addComponentListener(ComponentListener l)
l is null,
no exception is thrown and no action is performed.
l - the component listene.java.awt.event.ComponentEvent,
java.awt.event.ComponentListener,
removeComponentListener(java.awt.event.ComponentListener),
getComponentListeners()public void removeComponentListener(ComponentListener l)
l is null,
no exception is thrown and no action is performed.
l - the component listenerjava.awt.event.ComponentEvent,
java.awt.event.ComponentListener,
addComponentListener(java.awt.event.ComponentListener),
getComponentListeners()public ComponentListener[] getComponentListeners()
ComponentListeners
or an empty array if no component
listeners are currently registeredaddComponentListener(java.awt.event.ComponentListener),
removeComponentListener(java.awt.event.ComponentListener)public void addFocusListener(FocusListener l)
l is null,
no exception is thrown and no action is performed.
l - the focus listenerjava.awt.event.FocusEvent,
java.awt.event.FocusListener,
removeFocusListener(java.awt.event.FocusListener),
getFocusListeners()public void removeFocusListener(FocusListener l)
l is null,
no exception is thrown and no action is performed.
l - the focus listenerjava.awt.event.FocusEvent,
java.awt.event.FocusListener,
addFocusListener(java.awt.event.FocusListener),
getFocusListeners()public FocusListener[] getFocusListeners()
FocusListeners
or an empty array if no component
listeners are currently registeredaddFocusListener(java.awt.event.FocusListener),
removeFocusListener(java.awt.event.FocusListener)public void addHierarchyListener(HierarchyListener l)
l is null,
no exception is thrown and no action is performed.
l - the hierarchy listenerjava.awt.event.HierarchyEvent,
java.awt.event.HierarchyListener,
removeHierarchyListener(java.awt.event.HierarchyListener),
getHierarchyListeners()public void removeHierarchyListener(HierarchyListener l)
l is null,
no exception is thrown and no action is performed.
l - the hierarchy listenerjava.awt.event.HierarchyEvent,
java.awt.event.HierarchyListener,
addHierarchyListener(java.awt.event.HierarchyListener),
getHierarchyListeners()public HierarchyListener[] getHierarchyListeners()
HierarchyListeners
or an empty array if no hierarchy
listeners are currently registeredaddHierarchyListener(java.awt.event.HierarchyListener),
removeHierarchyListener(java.awt.event.HierarchyListener)public void addHierarchyBoundsListener(HierarchyBoundsListener l)
l is null,
no exception is thrown and no action is performed.
l - the hierarchy bounds listenerjava.awt.event.HierarchyEvent,
java.awt.event.HierarchyBoundsListener,
removeHierarchyBoundsListener(java.awt.event.HierarchyBoundsListener),
getHierarchyBoundsListeners()public void removeHierarchyBoundsListener(HierarchyBoundsListener l)
l is null,
no exception is thrown and no action is performed.
l - the hierarchy bounds listenerjava.awt.event.HierarchyEvent,
java.awt.event.HierarchyBoundsListener,
addHierarchyBoundsListener(java.awt.event.HierarchyBoundsListener),
getHierarchyBoundsListeners()int numListening(long mask)
int countHierarchyMembers()
int createHierarchyEvents(int id,
Component changed,
Container changedParent,
long changeFlags,
boolean enabledOnToolkit)
public HierarchyBoundsListener[] getHierarchyBoundsListeners()
HierarchyBoundsListeners
or an empty array if no hierarchy bounds
listeners are currently registeredaddHierarchyBoundsListener(java.awt.event.HierarchyBoundsListener),
removeHierarchyBoundsListener(java.awt.event.HierarchyBoundsListener)
void createChildHierarchyEvents(int id,
long changeFlags,
boolean enabledOnToolkit)
void adjustListeningChildrenOnParent(long mask,
int num)
public void addKeyListener(KeyListener l)
l - the key listener.java.awt.event.KeyEvent,
java.awt.event.KeyListener,
removeKeyListener(java.awt.event.KeyListener),
getKeyListeners()public void removeKeyListener(KeyListener l)
l is null,
no exception is thrown and no action is performed.
l - the key listenerjava.awt.event.KeyEvent,
java.awt.event.KeyListener,
addKeyListener(java.awt.event.KeyListener),
getKeyListeners()public KeyListener[] getKeyListeners()
KeyListeners
or an empty array if no key
listeners are currently registeredaddKeyListener(java.awt.event.KeyListener),
removeKeyListener(java.awt.event.KeyListener)public void addMouseListener(MouseListener l)
l is null,
no exception is thrown and no action is performed.
l - the mouse listenerjava.awt.event.MouseEvent,
java.awt.event.MouseListener,
removeMouseListener(java.awt.event.MouseListener),
getMouseListeners()public void removeMouseListener(MouseListener l)
l is null,
no exception is thrown and no action is performed.
l - the mouse listenerjava.awt.event.MouseEvent,
java.awt.event.MouseListener,
addMouseListener(java.awt.event.MouseListener),
getMouseListeners()public MouseListener[] getMouseListeners()
MouseListeners
or an empty array if no mouse
listeners are currently registeredaddMouseListener(java.awt.event.MouseListener),
removeMouseListener(java.awt.event.MouseListener)public void addMouseMotionListener(MouseMotionListener l)
l is null,
no exception is thrown and no action is performed.
l - the mouse motion listenerjava.awt.event.MouseEvent,
java.awt.event.MouseMotionListener,
removeMouseMotionListener(java.awt.event.MouseMotionListener),
getMouseMotionListeners()public void removeMouseMotionListener(MouseMotionListener l)
l is null,
no exception is thrown and no action is performed.
l - the mouse motion listenerjava.awt.event.MouseEvent,
java.awt.event.MouseMotionListener,
addMouseMotionListener(java.awt.event.MouseMotionListener),
getMouseMotionListeners()public MouseMotionListener[] getMouseMotionListeners()
MouseMotionListeners
or an empty array if no mouse motion
listeners are currently registeredaddMouseMotionListener(java.awt.event.MouseMotionListener),
removeMouseMotionListener(java.awt.event.MouseMotionListener)public void addMouseWheelListener(MouseWheelListener l)
l - the mouse wheel listener.java.awt.event.MouseWheelEvent,
java.awt.event.MouseWheelListener,
removeMouseWheelListener(java.awt.event.MouseWheelListener),
getMouseWheelListeners()public void removeMouseWheelListener(MouseWheelListener l)
l - the mouse wheel listener.java.awt.event.MouseWheelEvent,
java.awt.event.MouseWheelListener,
addMouseWheelListener(java.awt.event.MouseWheelListener),
getMouseWheelListeners()public MouseWheelListener[] getMouseWheelListeners()
MouseWheelListeners
or an empty array if no mouse wheel
listeners are currently registeredaddMouseWheelListener(java.awt.event.MouseWheelListener),
removeMouseWheelListener(java.awt.event.MouseWheelListener)public void addInputMethodListener(InputMethodListener l)
getInputMethodRequests to return an
InputMethodRequests instance.
If listener l is null,
no exception is thrown and no action is performed.
l - the input method listenerjava.awt.event.InputMethodEvent,
java.awt.event.InputMethodListener,
removeInputMethodListener(java.awt.event.InputMethodListener),
getInputMethodListeners(),
getInputMethodRequests()public void removeInputMethodListener(InputMethodListener l)
l is null,
no exception is thrown and no action is performed.
l - the input method listenerjava.awt.event.InputMethodEvent,
java.awt.event.InputMethodListener,
addInputMethodListener(java.awt.event.InputMethodListener),
getInputMethodListeners()public InputMethodListener[] getInputMethodListeners()
InputMethodListeners
or an empty array if no input method
listeners are currently registeredaddInputMethodListener(java.awt.event.InputMethodListener),
removeInputMethodListener(java.awt.event.InputMethodListener)public EventListener[] getListeners(Class listenerType)
FooListeners
upon this Component.
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
Component c
for its mouse listeners with the following code:
MouseListener[] mls = (MouseListener[])(c.getListeners(MouseListener.class));If no such listeners exist, this method returns an empty array.
listenerType - the type of listeners requested; this parameter
should specify an interface that descends from
java.util.EventListener
FooListeners on this component,
or an empty array if no such listeners have been addedgetComponentListeners(),
getFocusListeners(),
getHierarchyListeners(),
getHierarchyBoundsListeners(),
getKeyListeners(),
getMouseListeners(),
getMouseMotionListeners(),
getMouseWheelListeners(),
getInputMethodListeners(),
getPropertyChangeListeners()public java.awt.im.InputMethodRequests getInputMethodRequests()
InputMethodRequests instance.
At the same time, it also has to handle input method events.
null by defaultaddInputMethodListener(java.awt.event.InputMethodListener)public java.awt.im.InputContext getInputContext()
null if no context can be determinedprotected final void enableEvents(long eventsToEnable)
Event types are automatically enabled when a listener for that event type is added to the component.
This method only needs to be invoked by subclasses of
Component which desire to have the specified event
types delivered to processEvent regardless of whether
or not a listener is registered.
eventsToEnable - the event mask defining the event typesprocessEvent(java.awt.AWTEvent),
disableEvents(long),
AWTEventprotected final void disableEvents(long eventsToDisable)
eventsToDisable - the event mask defining the event typesenableEvents(long)
protected AWTEvent coalesceEvents(AWTEvent existingEvent,
AWTEvent newEvent)
EventQueue.postEvent
if an event with the same ID as the event to be posted is found in
the queue (both events must have this component as their source).
This method either returns a coalesced event which replaces
the existing event (and the new event is then discarded), or
null to indicate that no combining should be done
(add the second event to the end of the queue). Either event
parameter may be modified and returned, as the other one is discarded
unless null is returned.
This implementation of coalesceEvents coalesces
two event types: mouse move (and drag) events,
and paint (and update) events.
For mouse move events the last event is always returned, causing
intermediate moves to be discarded. For paint events, the new
event is coalesced into a complex RepaintArea in the peer.
The new AWTEvent is always returned.
existingEvent - the event already on the EventQueuenewEvent - the event being posted to the
EventQueue
null indicating that no
coalescing was doneprotected void processEvent(AWTEvent e)
process<event type>Event
method for the given class of event.
Note that if the event parameter is null
the behavior is unspecified and may result in an
exception.
e - the eventprocessComponentEvent(java.awt.event.ComponentEvent),
processFocusEvent(java.awt.event.FocusEvent),
processKeyEvent(java.awt.event.KeyEvent),
processMouseEvent(java.awt.event.MouseEvent),
processMouseMotionEvent(java.awt.event.MouseEvent),
processInputMethodEvent(java.awt.event.InputMethodEvent),
processHierarchyEvent(java.awt.event.HierarchyEvent),
processMouseWheelEvent(java.awt.event.MouseWheelEvent)protected void processComponentEvent(ComponentEvent e)
ComponentListener objects.
This method is not called unless component events are enabled for this component. Component events are enabled when one of the following occurs:
ComponentListener object is registered
via addComponentListener.
enableEvents.
Note that if the event parameter is null
the behavior is unspecified and may result in an
exception.
e - the component eventjava.awt.event.ComponentEvent,
java.awt.event.ComponentListener,
addComponentListener(java.awt.event.ComponentListener),
enableEvents(long)protected void processFocusEvent(FocusEvent e)
FocusListener objects.
This method is not called unless focus events are enabled for this component. Focus events are enabled when one of the following occurs:
FocusListener object is registered
via addFocusListener.
enableEvents.
Note that if the event parameter is null
the behavior is unspecified and may result in an
exception.
e - the focus eventjava.awt.event.FocusEvent,
java.awt.event.FocusListener,
addFocusListener(java.awt.event.FocusListener),
enableEvents(long)protected void processKeyEvent(KeyEvent e)
KeyListener objects.
This method is not called unless key events are enabled for this component. Key events are enabled when one of the following occurs:
KeyListener object is registered
via addKeyListener.
enableEvents.
Note that this method is not called by the event
dispatch thread if the component is not the focus
owner of if the component is not showing. This method
is called when key events are
registered via the addKeyListener or
enableEvents methods but, as of release 1.4,
the implementation of the AWT event dispatching thread
redirects KeyEvent to the focus owner.
Please see the
Focus Specification for further information.
If the event parameter is null
the behavior is unspecified and may result in an
exception.
e - the key eventjava.awt.event.KeyEvent,
java.awt.event.KeyListener,
addKeyListener(java.awt.event.KeyListener),
enableEvents(long),
isShowing()protected void processMouseEvent(MouseEvent e)
MouseListener objects.
This method is not called unless mouse events are enabled for this component. Mouse events are enabled when one of the following occurs:
MouseListener object is registered
via addMouseListener.
enableEvents.
Note that if the event parameter is null
the behavior is unspecified and may result in an
exception.
e - the mouse eventjava.awt.event.MouseEvent,
java.awt.event.MouseListener,
addMouseListener(java.awt.event.MouseListener),
enableEvents(long)protected void processMouseMotionEvent(MouseEvent e)
MouseMotionListener objects.
This method is not called unless mouse motion events are enabled for this component. Mouse motion events are enabled when one of the following occurs:
MouseMotionListener object is registered
via addMouseMotionListener.
enableEvents.
Note that if the event parameter is null
the behavior is unspecified and may result in an
exception.
e - the mouse motion eventjava.awt.event.MouseEvent,
java.awt.event.MouseMotionListener,
addMouseMotionListener(java.awt.event.MouseMotionListener),
enableEvents(long)protected void processMouseWheelEvent(MouseWheelEvent e)
MouseWheelListener objects.
This method is not called unless mouse wheel events are enabled for this component. Mouse wheel events are enabled when one of the following occurs:
MouseWheelListener object is registered
via addMouseWheelListener.
enableEvents.
Note that if the event parameter is null
the behavior is unspecified and may result in an
exception.
e - the mouse wheel event.java.awt.event.MouseWheelEvent,
java.awt.event.MouseWheelListener,
addMouseWheelListener(java.awt.event.MouseWheelListener),
enableEvents(long)boolean postsOldMouseEvents()
protected void processInputMethodEvent(InputMethodEvent e)
InputMethodListener objects.
This method is not called unless input method events are enabled for this component. Input method events are enabled when one of the following occurs:
InputMethodListener object is registered
via addInputMethodListener.
enableEvents.
Note that if the event parameter is null
the behavior is unspecified and may result in an
exception.
e - the input method eventjava.awt.event.InputMethodEvent,
java.awt.event.InputMethodListener,
addInputMethodListener(java.awt.event.InputMethodListener),
enableEvents(long)protected void processHierarchyEvent(HierarchyEvent e)
HierarchyListener objects.
This method is not called unless hierarchy events are enabled for this component. Hierarchy events are enabled when one of the following occurs:
HierarchyListener object is registered
via addHierarchyListener.
enableEvents.
Note that if the event parameter is null
the behavior is unspecified and may result in an
exception.
e - the hierarchy eventjava.awt.event.HierarchyEvent,
java.awt.event.HierarchyListener,
addHierarchyListener(java.awt.event.HierarchyListener),
enableEvents(long)protected void processHierarchyBoundsEvent(HierarchyEvent e)
HierarchyBoundsListener objects.
This method is not called unless hierarchy bounds events are enabled for this component. Hierarchy bounds events are enabled when one of the following occurs:
HierarchyBoundsListener object is registered
via addHierarchyBoundsListener.
enableEvents.
Note that if the event parameter is null
the behavior is unspecified and may result in an
exception.
e - the hierarchy eventjava.awt.event.HierarchyEvent,
java.awt.event.HierarchyBoundsListener,
addHierarchyBoundsListener(java.awt.event.HierarchyBoundsListener),
enableEvents(long)public boolean handleEvent(Event evt)
public boolean mouseDown(Event evt,
int x,
int y)
public boolean mouseDrag(Event evt,
int x,
int y)
public boolean mouseUp(Event evt,
int x,
int y)
public boolean mouseMove(Event evt,
int x,
int y)
public boolean mouseEnter(Event evt,
int x,
int y)
public boolean mouseExit(Event evt,
int x,
int y)
public boolean keyDown(Event evt,
int key)
public boolean keyUp(Event evt,
int key)
public boolean action(Event evt,
Object what)
public void addNotify()
Component displayable by connecting it to a
native screen resource.
This method is called internally by the toolkit and should
not be called directly by programs.
isDisplayable(),
removeNotify()public void removeNotify()
Component undisplayable by destroying it native
screen resource.
This method is called by the toolkit internally and should
not be called directly by programs.
isDisplayable(),
addNotify()
public boolean gotFocus(Event evt,
Object what)
public boolean lostFocus(Event evt,
Object what)
public boolean isFocusTraversable()
isFocusable().
Component can become the focus
owner.
true if this Component is
focusable; false otherwisesetFocusable(boolean)public boolean isFocusable()
true if this Component is focusable;
false otherwise.setFocusable(boolean)public void setFocusable(boolean focusable)
focusable - indicates whether this Component is focusableisFocusable()final boolean isFocusTraversableOverridden()
public void setFocusTraversalKeys(int id,
Set keystrokes)
The default values for a Component's focus traversal keys are implementation-dependent. Sun recommends that all implementations for a particular native platform use the same default values. The recommendations for Windows and Unix are listed below. These recommendations are used in the Sun AWT implementations.
| Identifier | Meaning | Default |
|---|---|---|
| KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS | Normal forward keyboard traversal | TAB on KEY_PRESSED, CTRL-TAB on KEY_PRESSED |
| KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS | Normal reverse keyboard traversal | SHIFT-TAB on KEY_PRESSED, CTRL-SHIFT-TAB on KEY_PRESSED |
| KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS | Go up one focus traversal cycle | none |
Using the AWTKeyStroke API, client code can specify on which of two specific KeyEvents, KEY_PRESSED or KEY_RELEASED, the focus traversal operation will occur. Regardless of which KeyEvent is specified, however, all KeyEvents related to the focus traversal key, including the associated KEY_TYPED event, will be consumed, and will not be dispatched to any Component. It is a runtime error to specify a KEY_TYPED event as mapping to a focus traversal operation, or to map the same event to multiple default focus traversal operations.
If a value of null is specified for the Set, this Component inherits the Set from its parent. If all ancestors of this Component have null specified for the Set, then the current KeyboardFocusManager's default Set is used.
id - one of KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS,
KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, or
KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYSkeystrokes - the Set of AWTKeyStroke for the specified operation
IllegalArgumentException - if id is not one of
KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS,
KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, or
KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS, or if keystrokes
contains null, or if any Object in keystrokes is not an
AWTKeyStroke, or if any keystroke represents a KEY_TYPED event,
or if any keystroke already maps to another focus traversal
operation for this ComponentgetFocusTraversalKeys(int),
KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS,
KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS,
KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYSpublic Set getFocusTraversalKeys(int id)
setFocusTraversalKeys for a full description of each key.)
If a Set of traversal keys has not been explicitly defined for this Component, then this Component's parent's Set is returned. If no Set has been explicitly defined for any of this Component's ancestors, then the current KeyboardFocusManager's default Set is returned.
id - one of KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS,
KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, or
KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS
IllegalArgumentException - if id is not one of
KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS,
KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, or
KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYSsetFocusTraversalKeys(int, java.util.Set),
KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS,
KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS,
KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS
final void setFocusTraversalKeys_NoIDCheck(int id,
Set keystrokes)
final Set getFocusTraversalKeys_NoIDCheck(int id)
public boolean areFocusTraversalKeysSet(int id)
false, this Component is inheriting the
Set from an ancestor, or from the current KeyboardFocusManager.
id - one of KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS,
KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, or
KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS
true if the the Set of focus traversal keys for the
given focus traversal operation has been explicitly defined for
this Component; false otherwise.
IllegalArgumentException - if id is not one of
KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS,
KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, or
KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYSpublic void setFocusTraversalKeysEnabled(boolean focusTraversalKeysEnabled)
focusTraversalKeysEnabled - whether focus traversal keys are
enabled for this ComponentgetFocusTraversalKeysEnabled(),
setFocusTraversalKeys(int, java.util.Set),
getFocusTraversalKeys(int)public boolean getFocusTraversalKeysEnabled()
setFocusTraversalKeysEnabled(boolean),
setFocusTraversalKeys(int, java.util.Set),
getFocusTraversalKeys(int)public void requestFocus()
This method cannot be used to set the focus owner to no Component at
all. Use KeyboardFocusManager.clearGlobalFocusOwner()
instead.
Because the focus behavior of this method is platform-dependent,
developers are strongly encouraged to use
requestFocusInWindow when possible.
requestFocusInWindow(),
java.awt.event.FocusEvent,
addFocusListener(java.awt.event.FocusListener),
isFocusable(),
isDisplayable(),
KeyboardFocusManager.clearGlobalFocusOwner()protected boolean requestFocus(boolean temporary)
This method returns a boolean value. If false is returned,
the request is guaranteed to fail. If true is
returned, the request will succeed unless it is vetoed, or an
extraordinary event, such as disposal of the Component's peer, occurs
before the request can be granted by the native windowing system. Again,
while a return value of true indicates that the request is
likely to succeed, developers must never assume that this Component is
the focus owner until this Component receives a FOCUS_GAINED event.
This method cannot be used to set the focus owner to no Component at
all. Use KeyboardFocusManager.clearGlobalFocusOwner()
instead.
Because the focus behavior of this method is platform-dependent,
developers are strongly encouraged to use
requestFocusInWindow when possible.
Every effort will be made to ensure that FocusEvents generated as a result of this request will have the specified temporary value. However, because specifying an arbitrary temporary state may not be implementable on all native windowing systems, correct behavior for this method can be guaranteed only for lightweight Components. This method is not intended for general use, but exists instead as a hook for lightweight Component libraries, such as Swing.
false if the focus change request is guaranteed to
fail; true if it is likely to succeedjava.awt.event.FocusEvent,
addFocusListener(java.awt.event.FocusListener),
isFocusable(),
isDisplayable(),
KeyboardFocusManager.clearGlobalFocusOwner()public boolean requestFocusInWindow()
This method returns a boolean value. If false is returned,
the request is guaranteed to fail. If true is
returned, the request will succeed unless it is vetoed, or an
extraordinary event, such as disposal of the Component's peer, occurs
before the request can be granted by the native windowing system. Again,
while a return value of true indicates that the request is
likely to succeed, developers must never assume that this Component is
the focus owner until this Component receives a FOCUS_GAINED event.
This method cannot be used to set the focus owner to no Component at
all. Use KeyboardFocusManager.clearGlobalFocusOwner()
instead.
The focus behavior of this method can be implemented uniformly across
platforms, and thus developers are strongly encouraged to use this
method over requestFocus when possible. Code which relies
on requestFocus may exhibit different focus behavior on
different platforms.
false if the focus change request is guaranteed to
fail; true if it is likely to succeedrequestFocus(),
java.awt.event.FocusEvent,
addFocusListener(java.awt.event.FocusListener),
isFocusable(),
isDisplayable(),
KeyboardFocusManager.clearGlobalFocusOwner()protected boolean requestFocusInWindow(boolean temporary)
This method returns a boolean value. If false is returned,
the request is guaranteed to fail. If true is
returned, the request will succeed unless it is vetoed, or an
extraordinary event, such as disposal of the Component's peer, occurs
before the request can be granted by the native windowing system. Again,
while a return value of true indicates that the request is
likely to succeed, developers must never assume that this Component is
the focus owner until this Component receives a FOCUS_GAINED event.
This method cannot be used to set the focus owner to no Component at
all. Use KeyboardFocusManager.clearGlobalFocusOwner()
instead.
The focus behavior of this method can be implemented uniformly across
platforms, and thus developers are strongly encouraged to use this
method over requestFocus when possible. Code which relies
on requestFocus may exhibit different focus behavior on
different platforms.
Every effort will be made to ensure that FocusEvents generated as a result of this request will have the specified temporary value. However, because specifying an arbitrary temporary state may not be implementable on all native windowing systems, correct behavior for this method can be guaranteed only for lightweight Components. This method is not intended for general use, but exists instead as a hook for lightweight Component libraries, such as Swing.
false if the focus change request is guaranteed to
fail; true if it is likely to succeedrequestFocus(),
java.awt.event.FocusEvent,
addFocusListener(java.awt.event.FocusListener),
isFocusable(),
isDisplayable(),
KeyboardFocusManager.clearGlobalFocusOwner()
final boolean requestFocusHelper(boolean temporary,
boolean focusedWindowChangeAllowed)
final void autoTransferFocus(boolean clearOnFailure)
private void doAutoTransfer(boolean clearOnFailure)
public void transferFocus()
requestFocus()public Container getFocusCycleRootAncestor()
Container.isFocusCycleRoot()public boolean isFocusCycleRoot(Container container)
container - the Container to be tested
true if the specified Container is a focus-cycle-
root of this Component; false otherwiseContainer.isFocusCycleRoot()public void nextFocus()
boolean nextFocusHelper()
public void transferFocusBackward()
requestFocus()public void transferFocusUpCycle()
requestFocus(),
Container.isFocusCycleRoot(),
Container.setFocusCycleRoot(boolean)public boolean hasFocus()
true if this Component is the
focus owner. This method is obsolete, and has been replaced by
isFocusOwner().
true if this Component is the
focus owner; false otherwisepublic boolean isFocusOwner()
true if this Component is the
focus owner.
true if this Component is the
focus owner; false otherwisepublic void add(PopupMenu popup)
popup - the popup menu to be added to the component.remove(MenuComponent)public void remove(MenuComponent popup)
remove in interface MenuContainerpopup - the popup menu to be removedadd(PopupMenu)protected String paramString()
null.
public String toString()
toString in class Objectpublic void list()
System.out.
java.lang.System#outpublic void list(PrintStream out)
out - a print stream
public void list(PrintStream out,
int indent)
out - a print streamindent - number of spaces to indentjava.io.PrintStream#println(java.lang.Object)public void list(PrintWriter out)
out - the print writer to print to
public void list(PrintWriter out,
int indent)
out - the print writer to print toindent - the number of spaces to indentjava.io.PrintStream#println(java.lang.Object)Container getNativeContainer()
public void addPropertyChangeListener(java.beans.PropertyChangeListener listener)
If listener is null, no exception is thrown and no action is performed.
listener - the PropertyChangeListener to be addedremovePropertyChangeListener(java.beans.PropertyChangeListener),
getPropertyChangeListeners(),
addPropertyChangeListener(java.lang.String, java.beans.PropertyChangeListener)public void removePropertyChangeListener(java.beans.PropertyChangeListener listener)
If listener is null, no exception is thrown and no action is performed.
listener - the PropertyChangeListener to be removedaddPropertyChangeListener(java.beans.PropertyChangeListener),
getPropertyChangeListeners(),
removePropertyChangeListener(java.lang.String,java.beans.PropertyChangeListener)public java.beans.PropertyChangeListener[] getPropertyChangeListeners()
PropertyChangeListeners
or an empty array if no property change
listeners are currently registeredaddPropertyChangeListener(java.beans.PropertyChangeListener),
removePropertyChangeListener(java.beans.PropertyChangeListener),
getPropertyChangeListeners(java.lang.String),
java.beans.PropertyChangeSupport#getPropertyChangeListeners
public void addPropertyChangeListener(String propertyName,
java.beans.PropertyChangeListener listener)
If listener is null, no exception is thrown and no action is performed.
propertyName - one of the property names listed abovelistener - the PropertyChangeListener to be addedremovePropertyChangeListener(java.lang.String, java.beans.PropertyChangeListener),
getPropertyChangeListeners(java.lang.String),
addPropertyChangeListener(java.lang.String, java.beans.PropertyChangeListener)
public void removePropertyChangeListener(String propertyName,
java.beans.PropertyChangeListener listener)
If listener is null, no exception is thrown and no action is performed.
propertyName - a valid property namelistener - the PropertyChangeListener to be removedaddPropertyChangeListener(java.lang.String, java.beans.PropertyChangeListener),
getPropertyChangeListeners(java.lang.String),
removePropertyChangeListener(java.beans.PropertyChangeListener)public java.beans.PropertyChangeListener[] getPropertyChangeListeners(String propertyName)
PropertyChangeListeners associated with
the named property or an empty array if no listeners have
been addedaddPropertyChangeListener(java.lang.String, java.beans.PropertyChangeListener),
removePropertyChangeListener(java.lang.String, java.beans.PropertyChangeListener),
getPropertyChangeListeners()
protected void firePropertyChange(String propertyName,
Object oldValue,
Object newValue)
propertyName - the property whose value has changedoldValue - the property's previous valuenewValue - the property's new value
protected void firePropertyChange(String propertyName,
boolean oldValue,
boolean newValue)
propertyName - the property whose value has changedoldValue - the property's previous valuenewValue - the property's new value
protected void firePropertyChange(String propertyName,
int oldValue,
int newValue)
propertyName - the property whose value has changedoldValue - the property's previous valuenewValue - the property's new value
private void writeObject(ObjectOutputStream s)
throws IOException
s - the ObjectOutputStream to write
IOExceptionAWTEventMulticaster.save(java.io.ObjectOutputStream, java.lang.String, java.util.EventListener),
componentListenerK,
focusListenerK,
keyListenerK,
mouseListenerK,
mouseMotionListenerK,
#inputListenerK,
hierarchyListenerK,
hierarchyBoundsListenerK,
mouseWheelListenerK,
readObject(java.io.ObjectInputStream)
private void readObject(ObjectInputStream s)
throws ClassNotFoundException,
IOException
ObjectInputStream and if it isn't
null adds a listener to receive a variety
of events fired by the component.
Unrecognized keys or values will be ignored.
s - the ObjectInputStream to read
ClassNotFoundException
IOExceptionwriteObject(java.io.ObjectOutputStream)public void setComponentOrientation(ComponentOrientation o)
LayoutManager and Component
subclasses will use this property to
determine how to lay out and draw components.
At construction time, a component's orientation is set to
ComponentOrientation.UNKNOWN,
indicating that it has not been specified
explicitly. The UNKNOWN orientation behaves the same as
ComponentOrientation.LEFT_TO_RIGHT.
To set the orientation of a single component, use this method.
To set the orientation of an entire component
hierarchy, use
applyComponentOrientation.
ComponentOrientationpublic ComponentOrientation getComponentOrientation()
LayoutManager
and Component
subclasses that wish to respect orientation should call this method to
get the component's orientation before performing layout or drawing.
ComponentOrientationpublic void applyComponentOrientation(ComponentOrientation orientation)
ComponentOrientation property of this component
and all components contained within it.
orientation - the new component orientation of this component and
the components contained within it.setComponentOrientation(java.awt.ComponentOrientation),
getComponentOrientation()private static void initIDs()
public AccessibleContext getAccessibleContext()
AccessibleContext associated
with this Component.
The method implemented by this base
class returns null. Classes that extend Component
should implement this method to return the
AccessibleContext associated with the subclass.
AccessibleContext of this
Componentint getAccessibleIndexInParent()
AccessibleStateSet getAccessibleStateSet()
AccessibleStateSet
containing the current state set of the objectAccessibleStatepublic void iterate(AssocFunc func)
public static boolean transferFocus(Component[] sources,
Component dest)
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