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java.awt
Class Container
java.lang.Object
java.awt.Component
java.awt.Container
-
All Implemented Interfaces:
-
ImageObserver
,
MenuContainer
,
Serializable
-
Direct Known Subclasses:
-
BasicSplitPaneDivider
,
CellRendererPane
,
DefaultTreeCellEditor.EditorContainer
,
JComponent
,
Panel
,
ScrollPane
,
Window
-
public class
Container
-
extends
Component
A generic Abstract Window Toolkit(AWT) container object is a component that can contain other AWT components.
Components added to a container are tracked in a list. The order of the list will define the components' front-to-back stacking order within the container. If no index is specified when adding a component to a container, it will be added to the end of the list (and hence to the bottom of the stacking order).
Note
: For details on the focus subsystem, see
How to Use the Focus Subsystem
, a section in The Java Tutorial, and the
Focus Specification
for more information.
-
Since:
-
JDK1.0
-
See Also:
-
add(java.awt.Component, int)
,
getComponent(int)
,
LayoutManager
,
Serialized Form
Nested classes inherited from class java.awt.
Component
|
Component.AccessibleAWTComponent
,
Component.BltBufferStrategy
,
Component.FlipBufferStrategy
|
Fields inherited from interface java.awt.image.
ImageObserver
|
ABORT
,
ALLBITS
,
ERROR
,
FRAMEBITS
,
HEIGHT
,
PROPERTIES
,
SOMEBITS
,
WIDTH
|
Constructor Summary
|
Container
()
Constructs a new Container. |
Method Summary
|
Component
|
add
(
Component
comp)
Appends the specified component to the end of this container. |
Component
|
add
(
Component
comp, int index)
Adds the specified component to this container at the given position. |
void |
add
(
Component
comp,
Object
constraints)
Adds the specified component to the end of this container. |
void |
add
(
Component
comp,
Object
constraints, int index)
Adds the specified component to this container with the specified constraints at the specified index. |
Component
|
add
(
String
name,
Component
comp)
Adds the specified component to this container. |
void |
addContainerListener
(
ContainerListener
l)
Adds the specified container listener to receive container events from this container. |
protected void |
addImpl
(
Component
comp,
Object
constraints, int index)
Adds the specified component to this container at the specified index. |
void |
addNotify
()
Makes this Container displayable by connecting it to a native screen resource. |
void |
addPropertyChangeListener
(
PropertyChangeListener
listener)
Adds a PropertyChangeListener to the listener list. |
void |
addPropertyChangeListener
(
String
propertyName,
PropertyChangeListener
listener)
Adds a PropertyChangeListener to the listener list for a specific property. |
void |
applyComponentOrientation
(
ComponentOrientation
o)
Sets the ComponentOrientation property of this container and all components contained within it. |
boolean |
areFocusTraversalKeysSet
(int id)
Returns whether the Set of focus traversal keys for the given focus traversal operation has been explicitly defined for this Container. |
int |
countComponents
()
Deprecated.
As of JDK version 1.1, replaced by getComponentCount().
|
void |
deliverEvent
(
Event
e)
Deprecated.
As of JDK version 1.1, replaced by dispatchEvent(AWTEvent e)
|
void |
doLayout
()
Causes this container to lay out its components. |
Component
|
findComponentAt
(int x, int y)
Locates the visible child component that contains the specified position. |
Component
|
findComponentAt
(
Point
p)
Locates the visible child component that contains the specified point. |
float |
getAlignmentX
()
Returns the alignment along the x axis. |
float |
getAlignmentY
()
Returns the alignment along the y axis. |
Component
|
getComponent
(int n)
Gets the nth component in this container. |
Component
|
getComponentAt
(int x, int y)
Locates the component that contains the x,y position. |
Component
|
getComponentAt
(
Point
p)
Gets the component that contains the specified point. |
int |
getComponentCount
()
Gets the number of components in this panel. |
Component
[] |
getComponents
()
Gets all the components in this container. |
int
|
getComponentZOrder
(
Component
Returns the z-order index of the component inside the container.
|
ContainerListener
[] |
getContainerListeners
()
Returns an array of all the container listeners registered on this container. |
Set
|
getFocusTraversalKeys
(int id)
Returns the Set of focus traversal keys for a given traversal operation for this Container. |
FocusTraversalPolicy
|
getFocusTraversalPolicy
()
Returns the focus traversal policy that will manage keyboard traversal of this Container's children, or null if this Container is not a focus cycle root. |
Insets
|
getInsets
()
Determines the insets of this container, which indicate the size of the container's border. |
LayoutManager
|
getLayout
()
Gets the layout manager for this container. |
EventListener
[] |
getListeners
(
Class
listenerType)
Returns an array of all the objects currently registered as FooListeners upon this Container. |
Dimension
|
getMaximumSize
()
Returns the maximum size of this container. |
Dimension
|
getMinimumSize
()
Returns the minimum size of this container. |
Point
|
getMousePosition
(boolean allowChildren)
Returns the position of the mouse pointer in this Container's coordinate space if the Container is under the mouse pointer, otherwise returns null.
|
Dimension
|
getPreferredSize
()
Returns the preferred size of this container. |
Insets
|
insets
()
Deprecated.
As of JDK version 1.1, replaced by getInsets().
|
void |
invalidate
()
Invalidates the container. |
boolean |
isAncestorOf
(
Component
c)
Checks if the component is contained in the component hierarchy of this container. |
boolean |
isFocusCycleRoot
()
Returns whether this Container is the root of a focus traversal cycle. |
boolean |
isFocusCycleRoot
(
Container
container)
Returns whether the specified Container is the focus cycle root of this Container's focus traversal cycle. |
boolean
|
isFocusTraversalPolicyProvider
()
Returns whether this container provides focus traversal policy.
|
boolean |
isFocusTraversalPolicySet
()
Returns whether the focus traversal policy has been explicitly set for this Container. |
void |
layout
()
Deprecated.
As of JDK version 1.1, replaced by doLayout().
|
void |
list
(
PrintStream
out, int indent)
Prints a listing of this container to the specified output stream. |
void |
list
(
PrintWriter
Prints out a list, starting at the specified
indentation,
indention,
to the specified print writer. |
Component
|
locate
(int x, int y)
Deprecated.
As of JDK version 1.1, replaced by getComponentAt(int, int).
|
Dimension
|
minimumSize
()
Deprecated.
As of JDK version 1.1, replaced by getMinimumSize().
|
void |
paint
(
Graphics
g)
Paints the container. |
void |
paintComponents
(
Graphics
g)
Paints each of the components in this container. |
protected
String
|
paramString
()
Returns a string representing the state of this Container. |
Dimension
|
preferredSize
()
Deprecated.
As of JDK version 1.1, replaced by getPreferredSize().
|
void |
print
(
Graphics
g)
Prints the container. |
void |
printComponents
(
Graphics
g)
Prints each of the components in this container. |
protected void |
processContainerEvent
(
ContainerEvent
e)
Processes container events occurring on this container by dispatching them to any registered ContainerListener objects. |
protected void |
processEvent
(
AWTEvent
e)
Processes events on this container. |
void |
remove
(
Component
comp)
Removes the specified component from this container. |
void |
remove
(int index)
Removes the component, specified by index, from this container. |
void |
removeAll
()
Removes all the components from this container. |
void |
removeContainerListener
(
ContainerListener
l)
Removes the specified container listener so it no longer receives container events from this container. |
void |
removeNotify
()
Makes this Container undisplayable by removing its connection to its native screen resource. |
void
|
setComponentZOrder
(
Component
Moves the specified component to the specified z-order index in the container.
|
void |
setFocusCycleRoot
(boolean focusCycleRoot)
Sets whether this Container is the root of a focus traversal cycle. |
void |
setFocusTraversalKeys
(int id,
Set
keystrokes)
Sets the focus traversal keys for a given traversal operation for this Container. |
void |
setFocusTraversalPolicy
(
FocusTraversalPolicy
policy)
Sets the focus traversal policy that will manage keyboard traversal of this Container's children, if this Container is a focus cycle root. |
void
|
setFocusTraversalPolicyProvider
(boolean provider)
Sets whether this container will be used to provide focus traversal policy.
|
void |
setFont
(
Font
f)
Sets the font of this container. |
void |
setLayout
(
LayoutManager
mgr)
Sets the layout manager for this container. |
void |
transferFocusBackward
()
Transfers the focus to the previous component, as though this Component were the focus owner. |
void |
transferFocusDownCycle
()
Transfers the focus down one focus traversal cycle. |
void |
update
(
Graphics
g)
Updates the container. |
void |
validate
()
Validates this container and all of its subcomponents. |
protected void |
validateTree
()
Recursively descends the container tree and recomputes the layout for any subtrees marked as needing it (those marked as invalid). |
Methods inherited from class java.awt.
Component
|
action
,
add
,
addComponentListener
,
addFocusListener
,
addHierarchyBoundsListener
,
addHierarchyListener
,
addInputMethodListener
,
addKeyListener
,
addMouseListener
,
addMouseMotionListener
,
addMouseWheelListener
,
bounds
,
checkImage
,
checkImage
,
coalesceEvents
,
contains
,
contains
,
createImage
,
createImage
,
createVolatileImage
,
createVolatileImage
,
disable
,
disableEvents
,
dispatchEvent
,
enable
,
enable
,
enableEvents
,
enableInputMethods
,
firePropertyChange
,
firePropertyChange
,
firePropertyChange
,
firePropertyChange
,
firePropertyChange
,
firePropertyChange
,
firePropertyChange
,
firePropertyChange
,
firePropertyChange
,
getAccessibleContext
,
getBackground
,
getBounds
,
getBounds
,
getColorModel
,
getComponentListeners
,
getComponentOrientation
,
getCursor
,
getDropTarget
,
getFocusCycleRootAncestor
,
getFocusListeners
,
getFocusTraversalKeysEnabled
,
getFont
,
getFontMetrics
,
getForeground
,
getGraphics
,
getGraphicsConfiguration
,
getHeight
,
getHierarchyBoundsListeners
,
getHierarchyListeners
,
getIgnoreRepaint
,
getInputContext
,
getInputMethodListeners
,
getInputMethodRequests
,
getKeyListeners
,
getLocale
,
getLocation
,
getLocation
,
getLocationOnScreen
,
getMouseListeners
,
getMouseMotionListeners
,
getMousePosition
,
getMouseWheelListeners
,
getName
,
getParent
,
getPeer
,
getPropertyChangeListeners
,
getPropertyChangeListeners
,
getSize
,
getSize
,
getToolkit
,
getTreeLock
,
getWidth
,
getX
,
getY
,
gotFocus
,
handleEvent
,
hasFocus
,
hide
,
imageUpdate
,
inside
,
isBackgroundSet
,
isCursorSet
,
isDisplayable
,
isDoubleBuffered
,
isEnabled
,
isFocusable
,
isFocusOwner
,
isFocusTraversable
,
isFontSet
,
isForegroundSet
,
isLightweight
,
isMaximumSizeSet
,
isMinimumSizeSet
,
isOpaque
,
isPreferredSizeSet
,
isShowing
,
isValid
,
isVisible
,
keyDown
,
keyUp
,
list
,
list
,
list
,
location
,
lostFocus
,
mouseDown
,
mouseDrag
,
mouseEnter
,
mouseExit
,
mouseMove
,
mouseUp
,
move
,
nextFocus
,
paintAll
,
postEvent
,
prepareImage
,
prepareImage
,
printAll
,
processComponentEvent
,
processFocusEvent
,
processHierarchyBoundsEvent
,
processHierarchyEvent
,
processInputMethodEvent
,
processKeyEvent
,
processMouseEvent
,
processMouseMotionEvent
,
processMouseWheelEvent
,
remove
,
removeComponentListener
,
removeFocusListener
,
removeHierarchyBoundsListener
,
removeHierarchyListener
,
removeInputMethodListener
,
removeKeyListener
,
removeMouseListener
,
removeMouseMotionListener
,
removeMouseWheelListener
,
removePropertyChangeListener
,
removePropertyChangeListener
,
repaint
,
repaint
,
repaint
,
repaint
,
requestFocus
,
requestFocus
,
requestFocusInWindow
,
requestFocusInWindow
,
reshape
,
resize
,
resize
,
setBackground
,
setBounds
,
setBounds
,
setComponentOrientation
,
setCursor
,
setDropTarget
,
setEnabled
,
setFocusable
,
setFocusTraversalKeysEnabled
,
setForeground
,
setIgnoreRepaint
,
setLocale
,
setLocation
,
setLocation
,
setMaximumSize
,
setMinimumSize
,
setName
,
setPreferredSize
,
setSize
,
setSize
,
setVisible
,
show
,
show
,
size
,
toString
,
transferFocus
,
transferFocusUpCycle
|
Container
public Container()
-
Constructs a new Container. Containers can be extended directly, but are lightweight in this case and must be contained by a parent somewhere higher up in the component tree that is native. (such as Frame for example).
getComponentCount
public int getComponentCount()
-
Gets the number of components in this panel.
-
-
Returns:
-
the number of components in this panel.
-
Since:
-
JDK1.1
-
See Also:
-
getComponent(int)
countComponents
public int countComponents()
-
Deprecated.
As of JDK version 1.1, replaced by getComponentCount().
-
getComponent
public Component getComponent(int n)
-
Gets the nth component in this container.
-
-
Parameters:
-
n - the index of the component to get.
-
Returns:
-
the n
th
component in this container.
-
Throws:
-
ArrayIndexOutOfBoundsException
- if the n
th
value does not exist.
getComponents
public Component[] getComponents()
-
Gets all the components in this container.
-
-
Returns:
-
an array of all the components in this container.
getInsets
public Insets getInsets()
-
Determines the insets of this container, which indicate the size of the container's border.
A Frame object, for example, has a top inset that corresponds to the height of the frame's title bar.
-
-
Returns:
-
the insets of this container.
-
Since:
-
JDK1.1
-
See Also:
-
Insets
,
LayoutManager
insets
public Insets insets()
-
Deprecated.
As of JDK version 1.1, replaced by getInsets().
-
add
public Component add(Component comp)
-
Appends the specified component to the end of this container. This is a convenience method for
addImpl(java.awt.Component, java.lang.Object, int)
.
Note: If a component has been added to a container that has been displayed, validate must be called on that container to display the new component. If multiple components are being added, you can improve efficiency by calling validate only once, after all the components have been added.
-
-
Parameters:
-
comp - the component to be added
-
Returns:
-
the component argument
-
See Also:
-
addImpl(java.awt.Component, java.lang.Object, int)
,
validate()
,
JComponent.revalidate()
add
public Component add(String name,
Component comp)
-
Adds the specified component to this container. This is a convenience method for
addImpl(java.awt.Component, java.lang.Object, int)
.
This method is obsolete as of 1.1. Please use the method add(Component, Object) instead.
-
-
See Also:
-
add(Component, Object)
add
public Component add(Component comp,
int index)
-
Adds the specified component to this container at the given position. This is a convenience method for
addImpl(java.awt.Component, java.lang.Object, int)
.
Note: If a component has been added to a container that has been displayed, validate must be called on that container to display the new component. If multiple components are being added, you can improve efficiency by calling validate only once, after all the components have been added.
-
-
Parameters:
-
comp - the component to be added
-
index - the position at which to insert the component, or -1 to append the component to the end
-
Returns:
-
the component comp
-
See Also:
-
addImpl(java.awt.Component, java.lang.Object, int)
,
remove(int)
,
validate()
,
JComponent.revalidate()
setComponentZOrder
public final void setComponentZOrder ( Component comp,
int index)
-
Moves the specified component to the specified z-order index in the container. The z-order determines the order that components are painted; the component with the highest z-order paints first and the component with the lowest z-order paints last. Where components overlap, the component with the lower z-order paints over the component with the higher z-order.
If the component is a child of some other container, it is removed from that container before being added to this container. The important difference between this method and java.awt.Container.add(Component, int) is that this method doesn't call removeNotify on the component while removing it from its previous container unless necessary and when allowed by the underlying native windowing system. This way, if the component has the keyboard focus, it maintains the focus when moved to the new position.
This property is guaranteed to apply only to lightweight non-Container components.
Note
: Not all platforms support changing the z-order of heavyweight components from one container into another without the call to removeNotify. There is no way to detect whether a platform supports this, so developers shouldn't make any assumptions.
-
-
Parameters:
-
comp - the component to be moved
-
index - the position in the container's list to insert the component, where getComponentCount() appends to the end
-
Throws:
-
NullPointerException
- if comp is null
-
IllegalArgumentException
- if comp is one of the container's parents
-
IllegalArgumentException
- if index is not in the range [0, getComponentCount()] for moving between containers, or not in the range [0, getComponentCount()-1] for moving inside a container
-
IllegalArgumentException
- if adding a container to itself
-
IllegalArgumentException
- if adding a Window to a container
-
Since:
-
1.5
-
See Also:
-
getComponentZOrder(java.awt.Component)
getComponentZOrder
public final int getComponentZOrder ( Component comp)
-
Returns the z-order index of the component inside the container. The higher a component is in the z-order hierarchy, the lower its index. The component with the lowest z-order index is painted last, above all other child components.
-
-
Parameters:
-
comp - the component being queried
-
Returns:
-
the z-order index of the component; otherwise returns -1 if the component is null
Since:
-
1.5
-
See Also:
-
setComponentZOrder(java.awt.Component, int)
add
public void add(Component comp,
Object constraints)
-
Adds the specified component to the end of this container. Also notifies the layout manager to add the component to this container's layout using the specified constraints object. This is a convenience method for
addImpl(java.awt.Component, java.lang.Object, int)
.
Note: If a component has been added to a container that has been displayed, validate must be called on that container to display the new component. If multiple components are being added, you can improve efficiency by calling validate only once, after all the components have been added.
-
-
Parameters:
-
comp - the component to be added
-
constraints - an object expressing layout contraints for this component
-
Since:
-
JDK1.1
-
See Also:
-
addImpl(java.awt.Component, java.lang.Object, int)
,
validate()
,
JComponent.revalidate()
,
LayoutManager
add
public void add(Component comp,
Object constraints,
int index)
-
Adds the specified component to this container with the specified constraints at the specified index. Also notifies the layout manager to add the component to the this container's layout using the specified constraints object. This is a convenience method for
addImpl(java.awt.Component, java.lang.Object, int)
.
Note: If a component has been added to a container that has been displayed, validate must be called on that container to display the new component. If multiple components are being added, you can improve efficiency by calling validate only once, after all the components have been added.
-
-
Parameters:
-
comp - the component to be added
-
constraints - an object expressing layout contraints for this
-
index - the position in the container's list at which to insert the component; -1 means insert at the end component
-
See Also:
-
addImpl(java.awt.Component, java.lang.Object, int)
,
validate()
,
JComponent.revalidate()
,
remove(int)
,
LayoutManager
addImpl
protected void addImpl(Component comp,
Object constraints,
int index)
-
Adds the specified component to this container at the specified index. This method also notifies the layout manager to add the component to this container's layout using the specified constraints object via the addLayoutComponent method.
The constraints are defined by the particular layout manager being used. For example, the BorderLayout class defines five constraints: BorderLayout.NORTH, BorderLayout.SOUTH, BorderLayout.EAST, BorderLayout.WEST, and BorderLayout.CENTER.
The GridBagLayout class requires a GridBagConstraints object. Failure to pass the correct type of constraints object results in an IllegalArgumentException.
Note that if the component already exists in this container or a child of this container, it is removed from that container before being added to this container.
If the layout manager implements both the LayoutManager and LayoutManager2 interfaces, the LayoutManager2 methods are called.
Note that if the component already exists in this container or a child of this container, it is removed from that container before being added to this container.
This is the method to override if a program needs to track every add request to a container as all other add methods defer to this one. An overriding method should usually include a call to the superclass's version of the method:
super.addImpl(comp, constraints, index)
-
-
Parameters:
-
comp - the component to be added
-
constraints - an object expressing layout constraints for this component
-
index - the position in the container's list at which to insert the component, where -1 means append to the end
-
Throws:
-
IllegalArgumentException
- if index is invalid
-
IllegalArgumentException
- if adding the container's parent to itself
-
IllegalArgumentException
- if comp has been added to the Container more than once
-
IllegalArgumentException
- if adding a window to a container
-
Since:
-
JDK1.1
-
See Also:
-
add(Component)
,
add(Component, int)
,
add(Component, java.lang.Object)
,
LayoutManager
,
LayoutManager2
remove
public void remove(int index)
-
Removes the component, specified by index, from this container.
This method also notifies the layout manager to remove the component from this container's layout via the removeLayoutComponent method.
-
-
Parameters:
-
index - the index of the component to be
removed
removed.
-
Since:
-
JDK1.1
-
See Also:
-
add(java.awt.Component)
remove
public void remove(Component comp)
-
Removes the specified component from this container.
This method also notifies the layout manager to remove the component from this container's layout via the removeLayoutComponent method.
-
-
Parameters:
-
comp - the component to be removed
-
See Also:
-
add(java.awt.Component)
,
remove(int)
removeAll
public void removeAll()
-
Removes all the components from this container.
This method also notifies the layout manager to remove the components from this container's layout via the removeLayoutComponent method.
-
-
See Also:
-
add(java.awt.Component)
,
remove(int)
getLayout
public LayoutManager getLayout()
-
Gets the layout manager for this container.
-
-
See Also:
-
doLayout()
,
setLayout(java.awt.LayoutManager)
setLayout
public void setLayout(LayoutManager mgr)
-
Sets the layout manager for this container.
-
-
Parameters:
-
mgr - the specified layout manager
-
See Also:
-
doLayout()
,
getLayout()
doLayout
public void doLayout()
-
Causes this container to lay out its components. Most programs should not call this method directly, but should invoke the validate method instead.
-
-
Overrides:
-
doLayout
in class
Component
-
-
Since:
-
JDK1.1
-
See Also:
-
LayoutManager.layoutContainer(java.awt.Container)
,
setLayout(java.awt.LayoutManager)
,
validate()
layout
public void layout()
-
Deprecated.
As of JDK version 1.1, replaced by doLayout().
-
-
Overrides:
-
layout
in class
Component
-
invalidate
public void invalidate()
-
Invalidates the container. The container and all parents above it are marked as needing to be laid out. This method can be called often, so it needs to execute quickly.
-
-
Overrides:
-
invalidate
in class
Component
-
-
See Also:
-
validate()
,
layout()
,
LayoutManager
validate
public void validate()
-
Validates this container and all of its subcomponents.
The validate method is used to cause a container to lay out its subcomponents again. It should be invoked when this container's subcomponents are modified (added to or removed from the container, or layout-related information changed) after the container has been displayed.
-
-
Overrides:
-
validate
in class
Component
-
-
See Also:
-
add(java.awt.Component)
,
Component.invalidate()
,
JComponent.revalidate()
validateTree
protected void validateTree()
-
Recursively descends the container tree and recomputes the layout for any subtrees marked as needing it (those marked as invalid). Synchronization should be provided by the method that calls this one: validate.
-
setFont
public void setFont(Font f)
-
Sets the font of this container.
-
-
Overrides:
-
setFont
in class
Component
-
-
Parameters:
-
f - The font to become this container's font.
-
Since:
-
JDK1.0
-
See Also:
-
Component.getFont()
getPreferredSize
public Dimension getPreferredSize()
-
Returns the preferred size of this container.
-
-
Overrides:
-
getPreferredSize
in class
Component
-
-
Returns:
-
an instance of Dimension that represents the preferred size of this container.
-
See Also:
-
getMinimumSize()
,
getLayout()
,
LayoutManager.preferredLayoutSize(Container)
,
Component.getPreferredSize()
preferredSize
public Dimension preferredSize()
-
Deprecated.
As of JDK version 1.1, replaced by getPreferredSize().
-
-
Overrides:
-
preferredSize
in class
Component
-
getMinimumSize
public Dimension getMinimumSize()
-
Returns the minimum size of this container.
-
-
Overrides:
-
getMinimumSize
in class
Component
-
-
Returns:
-
an instance of Dimension that represents the minimum size of this container.
-
Since:
-
JDK1.1
-
See Also:
-
getPreferredSize()
,
getLayout()
,
LayoutManager.minimumLayoutSize(Container)
,
Component.getMinimumSize()
minimumSize
public Dimension minimumSize()
-
Deprecated.
As of JDK version 1.1, replaced by getMinimumSize().
-
-
Overrides:
-
minimumSize
in class
Component
-
getMaximumSize
public Dimension getMaximumSize()
-
Returns the maximum size of this container.
-
-
Overrides:
-
getMaximumSize
in class
Component
-
-
Returns:
-
a dimension object indicating this component's maximum size
-
See Also:
-
getPreferredSize()
getAlignmentX
public float getAlignmentX()
-
Returns the alignment along the x axis. This specifies how the component would like to be aligned relative to other components. The value should be a number between 0 and 1 where 0 represents alignment along the origin, 1 is aligned the furthest away from the origin, 0.5 is centered, etc.
-
-
Overrides:
-
getAlignmentX
in class
Component
-
getAlignmentY
public float getAlignmentY()
-
Returns the alignment along the y axis. This specifies how the component would like to be aligned relative to other components. The value should be a number between 0 and 1 where 0 represents alignment along the origin, 1 is aligned the furthest away from the origin, 0.5 is centered, etc.
-
-
Overrides:
-
getAlignmentY
in class
Component
-
paint
public void paint(Graphics g)
-
Paints the container. This forwards the paint to any lightweight components that are children of this container. If this method is reimplemented, super.paint(g) should be called so that lightweight components are properly rendered. If a child component is entirely clipped by the current clipping setting in g, paint() will not be forwarded to that child.
-
-
Overrides:
-
paint
in class
Component
-
-
Parameters:
-
g - the specified Graphics window
-
See Also:
-
Component.update(Graphics)
update
public void update(Graphics g)
-
Updates the container. This forwards the update to any lightweight components that are children of this container. If this method is reimplemented, super.update(g) should be called so that lightweight components are properly rendered. If a child component is entirely clipped by the current clipping setting in g, update() will not be forwarded to that child.
-
-
Overrides:
-
update
in class
Component
-
-
Parameters:
-
g - the specified Graphics window
-
See Also:
-
Component.update(Graphics)
print
public void print(Graphics g)
-
Prints the container. This forwards the print to any lightweight components that are children of this container. If this method is reimplemented, super.print(g) should be called so that lightweight components are properly rendered. If a child component is entirely clipped by the current clipping setting in g, print() will not be forwarded to that child.
-
-
Overrides:
-
print
in class
Component
-
-
Parameters:
-
g - the specified Graphics window
-
See Also:
-
Component.update(Graphics)
paintComponents
public void paintComponents(Graphics g)
-
Paints each of the components in this container.
-
-
Parameters:
-
g - the graphics context.
-
See Also:
-
Component.paint(java.awt.Graphics)
,
Component.paintAll(java.awt.Graphics)
printComponents
public void printComponents(Graphics g)
-
Prints each of the components in this container.
-
-
Parameters:
-
g - the graphics context.
-
See Also:
-
Component.print(java.awt.Graphics)
,
Component.printAll(java.awt.Graphics)
addContainerListener
public void addContainerListener(ContainerListener l)
-
Adds the specified container listener to receive container events from this container. If l is null, no exception is thrown and no action is performed.
-
-
Parameters:
-
l - the container listener
-
See Also:
-
removeContainerListener(java.awt.event.ContainerListener)
,
getContainerListeners()
removeContainerListener
public void removeContainerListener(ContainerListener l)
-
Removes the specified container listener so it no longer receives container events from this container. If l is null, no exception is thrown and no action is performed.
-
-
Parameters:
-
l - the container listener
-
See Also:
-
addContainerListener(java.awt.event.ContainerListener)
,
getContainerListeners()
getContainerListeners
public ContainerListener[] getContainerListeners()
-
Returns an array of all the container listeners registered on this container.
-
-
Returns:
-
all of this container's ContainerListeners or an empty array if no container listeners are currently registered
-
Since:
-
1.4
-
See Also:
-
addContainerListener(java.awt.event.ContainerListener)
,
removeContainerListener(java.awt.event.ContainerListener)
getListeners
public EventListener[] getListeners(Class listenerType)
-
Returns an array of all the objects currently registered as FooListeners upon this Container. 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 Container c for its container listeners with the following code:
ContainerListener[] cls = (ContainerListener[])(c.getListeners(ContainerListener.class));
If no such listeners exist, this method returns an empty array.
-
-
Overrides:
-
getListeners
in class
Component
-
-
Parameters:
-
listenerType - the type of listeners requested; this parameter should specify an interface that descends from java.util.EventListener
-
Returns:
-
an array of all objects registered as FooListeners on this container, or an empty array if no such listeners have been added
-
Throws:
-
ClassCastException
- if listenerType doesn't specify a class or interface that implements java.util.EventListener
-
Since:
-
1.3
-
See Also:
-
getContainerListeners()
processEvent
protected void processEvent(AWTEvent e)
-
Processes events on this container. If the event is a ContainerEvent, it invokes the processContainerEvent method, else it invokes its superclass's processEvent.
Note that if the event parameter is null the behavior is unspecified and may result in an exception.
-
-
Overrides:
-
processEvent
in class
Component
-
-
Parameters:
-
e - the event
-
See Also:
-
Component.processComponentEvent(java.awt.event.ComponentEvent)
,
Component.processFocusEvent(java.awt.event.FocusEvent)
,
Component.processKeyEvent(java.awt.event.KeyEvent)
,
Component.processMouseEvent(java.awt.event.MouseEvent)
,
Component.processMouseMotionEvent(java.awt.event.MouseEvent)
,
Component.processInputMethodEvent(java.awt.event.InputMethodEvent)
,
Component.processHierarchyEvent(java.awt.event.HierarchyEvent)
,
Component.processMouseWheelEvent(java.awt.event.MouseWheelEvent)
processContainerEvent
protected void processContainerEvent(ContainerEvent e)
-
Processes container events occurring on this container by dispatching them to any registered ContainerListener objects. NOTE: This method will not be called unless container events are enabled for this component; this happens when one of the following occurs:
-
A ContainerListener object is registered via addContainerListener
-
Container events are enabled via enableEvents
Note that if the event parameter is null the behavior is unspecified and may result in an exception.
-
-
Parameters:
-
e - the container event
-
See Also:
-
Component.enableEvents(long)
deliverEvent
public void deliverEvent(Event e)
-
Deprecated.
As of JDK version 1.1, replaced by dispatchEvent(AWTEvent e)
-
-
Overrides:
-
deliverEvent
in class
Component
-
getComponentAt
public Component getComponentAt(int x,
int y)
-
Locates the component that contains the x,y position. The top-most child component is returned in the case where there is overlap in the components. This is determined by finding the component closest to the index 0 that claims to contain the given point via Component.contains(), except that Components which have native peers take precedence over those which do not (i.e., lightweight Components).
-
-
Overrides:
-
getComponentAt
in class
Component
-
-
Parameters:
-
x - the
x
coordinate
-
y - the
y
coordinate
-
Returns:
-
null if the component does not contain the position. If there is no child component at the requested point and the point is within the bounds of the container the container itself is returned; otherwise the top-most child is returned.
-
Since:
-
JDK1.1
-
See Also:
-
Component.contains(int, int)
locate
public Component locate(int x,
int y)
-
Deprecated.
As of JDK version 1.1, replaced by getComponentAt(int, int).
-
-
Overrides:
-
locate
in class
Component
-
getComponentAt
public Component getComponentAt(Point p)
-
Gets the component that contains the specified point.
-
-
Overrides:
-
getComponentAt
in class
Component
-
-
Parameters:
-
p - the point.
-
Returns:
-
returns the component that contains the point, or null if the component does not contain the point.
-
Since:
-
JDK1.1
-
See Also:
-
Component.contains(int, int)
getMousePosition
public PointgetMousePosition (boolean allowChildren)
throws HeadlessException
-
Returns the position of the mouse pointer in this Container's coordinate space if the Container is under the mouse pointer, otherwise returns null. This method is similar to
Component.getMousePosition()
with the exception that it can take the Container's children into account. If allowChildren is false, this method will return a non-null value only if the mouse pointer is above the Container directly, not above the part obscured by children. If allowChildren is true, this method returns a non-null value if the mouse pointer is above Container or any of its descendants.
-
-
Parameters:
-
allowChildren - true if children should be taken into account
-
Returns:
-
mouse coordinates relative to this Component, or null
-
Throws:
-
HeadlessException
- if GraphicsEnvironment.isHeadless() returns true
-
Since:
-
1.5
-
See Also:
-
Component.getMousePosition()
findComponentAt
public Component findComponentAt(int x,
int y)
-
Locates the visible child component that contains the specified position. The top-most child component is returned in the case where there is overlap in the components. If the containing child component is a Container, this method will continue searching for the deepest nested child component. Components which are not visible are ignored during the search.
The findComponentAt method is different from getComponentAt in that getComponentAt only searches the Container's immediate children; if the containing component is a Container, findComponentAt will search that child to find a nested component.
-
-
Parameters:
-
x - the
x
coordinate
-
y - the
y
coordinate
-
Returns:
-
null if the component does not contain the position. If there is no child component at the requested point and the point is within the bounds of the container the container itself is returned.
-
Since:
-
1.2
-
See Also:
-
Component.contains(int, int)
,
getComponentAt(int, int)
findComponentAt
public Component findComponentAt(Point p)
-
Locates the visible child component that contains the specified point. The top-most child component is returned in the case where there is overlap in the components. If the containing child component is a Container, this method will continue searching for the deepest nested child component. Components which are not visible are ignored during the search.
The findComponentAt method is different from getComponentAt in that getComponentAt only searches the Container's immediate children; if the containing component is a Container, findComponentAt will search that child to find a nested component.
-
-
Parameters:
-
p - the point.
-
Returns:
-
null if the component does not contain the position. If there is no child component at the requested point and the point is within the bounds of the container the container itself is returned.
-
Since:
-
1.2
-
See Also:
-
Component.contains(int, int)
,
getComponentAt(int, int)
addNotify
public void addNotify()
-
Makes this Container displayable by connecting it to a native screen resource. Making a container displayable will cause all of its children to be made displayable. This method is called internally by the toolkit and should not be called directly by programs.
-
-
Overrides:
-
addNotify
in class
Component
-
-
See Also:
-
Component.isDisplayable()
,
removeNotify()
removeNotify
public void removeNotify()
-
Makes this Container undisplayable by removing its connection to its native screen resource. Making a container undisplayable will cause all of its children to be made undisplayable. This method is called by the toolkit internally and should not be called directly by programs.
-
-
Overrides:
-
removeNotify
in class
Component
-
-
See Also:
-
Component.isDisplayable()
,
addNotify()
isAncestorOf
public boolean isAncestorOf(Component c)
-
Checks if the component is contained in the component hierarchy of this container.
-
-
Parameters:
-
c - the component
-
Returns:
-
true if it is an ancestor; false otherwise.
-
Since:
-
JDK1.1
paramString
protected String paramString()
-
Returns a string representing the state of this Container. This method is intended to be used only for debugging purposes, and the content and format of the returned string may vary between implementations. The returned string may be empty but may not be null.
-
-
Overrides:
-
paramString
in class
Component
-
-
Returns:
-
the parameter string of this container
list
public void list(PrintStream out,
int indent)
-
Prints a listing of this container to the specified output stream. The listing starts at the specified indentation.
The immediate children of the container are printed with an indentation of indent+1. The children of those children are printed at indent+2 and so on.
-
-
Overrides:
-
list
in class
Component
-
-
Parameters:
-
out - a print
stream
stream.
-
indent - the number of spaces to
indent
indent.
-
Since:
-
JDK1.0
-
See Also:
-
Component.list(java.io.PrintStream, int)
list
public void list(PrintWriter out,
int indent)
-
Prints out a list, starting at the specified
indentation,
indention,
to the specified print writer.
The immediate children of the container are printed with an indentation of indent+1. The children of those children are printed at indent+2 and so on.
-
-
Overrides:
-
list
in class
Component
-
-
Parameters:
-
out -
a
the
print writer
to print to
-
indent - the number of spaces to indent
-
Since:
-
JDK1.1
-
See Also:
-
Component.list(java.io.PrintWriter, int)
PrintStream.println(java.lang.Object)
setFocusTraversalKeys
public void setFocusTraversalKeys(int id,
Set keystrokes)
-
Sets the focus traversal keys for a given traversal operation for this Container.
The default values for a Container'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 |
KeyboardFocusManager.DOWN_CYCLE_TRAVERSAL_KEYS |
|
Go down one focus traversal cycle |
none |
To disable a traversal key, use an empty Set; Collections.EMPTY_SET is recommended.
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 Container. 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 Container inherits the Set from its parent. If all ancestors of this Container have null specified for the Set, then the current KeyboardFocusManager's default Set is used.
-
-
Overrides:
-
setFocusTraversalKeys
in class
Component
-
-
Parameters:
-
id - one of KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS, KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS, or KeyboardFocusManager.DOWN_CYCLE_TRAVERSAL_KEYS
-
keystrokes - the Set of AWTKeyStroke for the specified operation
-
Throws:
-
IllegalArgumentException
- if id is not one of KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS, KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS, or KeyboardFocusManager.DOWN_CYCLE_TRAVERSAL_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 Container
-
Since:
-
1.4
-
See Also:
-
getFocusTraversalKeys(int)
,
KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS
,
KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS
,
KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS
,
KeyboardFocusManager.DOWN_CYCLE_TRAVERSAL_KEYS
getFocusTraversalKeys
public Set getFocusTraversalKeys(int id)
-
Returns the Set of focus traversal keys for a given traversal operation for this Container. (See setFocusTraversalKeys for a full description of each key.)
If a Set of traversal keys has not been explicitly defined for this Container, then this Container's parent's Set is returned. If no Set has been explicitly defined for any of this Container's ancestors, then the current KeyboardFocusManager's default Set is returned.
-
-
Overrides:
-
getFocusTraversalKeys
in class
Component
-
-
Parameters:
-
id - one of KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS, KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS, or KeyboardFocusManager.DOWN_CYCLE_TRAVERSAL_KEYS
-
Returns:
-
the Set of AWTKeyStrokes for the specified operation. The Set will be unmodifiable, and may be empty. null will never be returned.
-
Throws:
-
IllegalArgumentException
- if id is not one of KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS, KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS, or KeyboardFocusManager.DOWN_CYCLE_TRAVERSAL_KEYS
-
Since:
-
1.4
-
See Also:
-
setFocusTraversalKeys(int, java.util.Set)
,
KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS
,
KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS
,
KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS
,
KeyboardFocusManager.DOWN_CYCLE_TRAVERSAL_KEYS
areFocusTraversalKeysSet
public boolean areFocusTraversalKeysSet(int id)
-
Returns whether the Set of focus traversal keys for the given focus traversal operation has been explicitly defined for this Container. If this method returns false, this Container is inheriting the Set from an ancestor, or from the current KeyboardFocusManager.
-
-
Overrides:
-
areFocusTraversalKeysSet
in class
Component
-
-
Parameters:
-
id - one of KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS, KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS, or KeyboardFocusManager.DOWN_CYCLE_TRAVERSAL_KEYS
-
Returns:
-
true if the the Set of focus traversal keys for the given focus traversal operation has been explicitly defined for this Component; false otherwise.
-
Throws:
-
IllegalArgumentException
- if id is not one of KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS, KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS, or KeyboardFocusManager.DOWN_CYCLE_TRAVERSAL_KEYS
-
Since:
-
1.4
isFocusCycleRoot
public boolean isFocusCycleRoot(Container container)
-
Returns whether the specified Container is the focus cycle root of this Container's focus traversal cycle. Each focus traversal cycle has only a single focus cycle root and each Container which is not a focus cycle root belongs to only a single focus traversal cycle. Containers which are focus cycle roots belong to two cycles: one rooted at the Container itself, and one rooted at the Container's nearest focus-cycle-root ancestor. This method will return true for both such Containers in this case.
-
-
Overrides:
-
isFocusCycleRoot
in class
Component
-
-
Parameters:
-
container - the Container to be tested
-
Returns:
-
true if the specified Container is a focus-cycle- root of this Container; false otherwise
-
Since:
-
1.4
-
See Also:
-
isFocusCycleRoot()
transferFocusBackward
public void transferFocusBackward()
-
Description copied from class:
Component
-
Transfers the focus to the previous component, as though this Component were the focus owner.
-
-
Overrides:
-
transferFocusBackward
in class
Component
-
-
See Also:
-
Component.requestFocus()
setFocusTraversalPolicy
public void setFocusTraversalPolicy(FocusTraversalPolicy policy)
-
Sets the focus traversal policy that will manage keyboard traversal of this Container's children, if this Container is a focus cycle root. If the argument is null, this Container inherits its policy from its focus- cycle-root ancestor. If the argument is non-null, this policy will be inherited by all focus-cycle-root children that have no keyboard- traversal policy of their own (as will, recursively, their focus-cycle- root children).
If this Container is not a focus cycle root, the policy will be remembered, but will not be used or inherited by this or any other Containers until this Container is made a focus cycle root.
-
-
Parameters:
-
policy - the new focus traversal policy for this Container
-
Since:
-
1.4
-
See Also:
-
getFocusTraversalPolicy()
,
setFocusCycleRoot(boolean)
,
isFocusCycleRoot(java.awt.Container)
getFocusTraversalPolicy
public FocusTraversalPolicy getFocusTraversalPolicy()
-
Returns the focus traversal policy that will manage keyboard traversal of this Container's children, or null if this Container is not a focus cycle root. If no traversal policy has been explicitly set for this Container, then this Container's focus-cycle-root ancestor's policy is returned.
-
-
Returns:
-
this Container's focus traversal policy, or null if this Container is not a focus cycle root.
-
Since:
-
1.4
-
See Also:
-
setFocusTraversalPolicy(java.awt.FocusTraversalPolicy)
,
setFocusCycleRoot(boolean)
,
isFocusCycleRoot(java.awt.Container)
isFocusTraversalPolicySet
public boolean isFocusTraversalPolicySet()
-
Returns whether the focus traversal policy has been explicitly set for this Container. If this method returns false, this Container will inherit its focus traversal policy from an ancestor.
-
-
Returns:
-
true if the focus traversal policy has been explicitly set for this Container; false otherwise.
-
Since:
-
1.4
setFocusCycleRoot
public void setFocusCycleRoot(boolean focusCycleRoot)
-
Sets whether this Container is the root of a focus traversal cycle. Once focus enters a traversal cycle, typically it cannot leave it via focus traversal unless one of the up- or down-cycle keys is pressed. Normal traversal is limited to this Container, and all of this Container's descendants that are not descendants of inferior focus cycle roots. Note that a FocusTraversalPolicy may bend these restrictions, however. For example, ContainerOrderFocusTraversalPolicy supports implicit down-cycle traversal.
The alternative way to specify the traversal order of this Container's children is to make this Container a
focus traversal policy provider
.
-
-
Parameters:
-
focusCycleRoot - indicates whether this Container is the root of a focus traversal cycle
-
Since:
-
1.4
-
See Also:
-
isFocusCycleRoot()
,
setFocusTraversalPolicy(java.awt.FocusTraversalPolicy)
,
getFocusTraversalPolicy()
,
ContainerOrderFocusTraversalPolicy
,
setFocusTraversalPolicyProvider(boolean)
isFocusCycleRoot
public boolean isFocusCycleRoot()
-
Returns whether this Container is the root of a focus traversal cycle. Once focus enters a traversal cycle, typically it cannot leave it via focus traversal unless one of the up- or down-cycle keys is pressed. Normal traversal is limited to this Container, and all of this Container's descendants that are not descendants of inferior focus cycle roots. Note that a FocusTraversalPolicy may bend these restrictions, however. For example, ContainerOrderFocusTraversalPolicy supports implicit down-cycle traversal.
-
-
Returns:
-
whether this Container is the root of a focus traversal cycle
-
Since:
-
1.4
-
See Also:
-
setFocusCycleRoot(boolean)
,
setFocusTraversalPolicy(java.awt.FocusTraversalPolicy)
,
getFocusTraversalPolicy()
,
ContainerOrderFocusTraversalPolicy
setFocusTraversalPolicyProvider
public final void setFocusTraversalPolicyProvider (boolean provider)
-
Sets whether this container will be used to provide focus traversal policy. Container with this property as true will be used to acquire focus traversal policy instead of closest focus cycle root ancestor.
-
-
Parameters:
-
provide - indicates whether this container will be used to provide focus traversal policy
-
Since:
-
1.5
-
See Also:
-
setFocusTraversalPolicy(java.awt.FocusTraversalPolicy)
,
getFocusTraversalPolicy()
,
isFocusTraversalPolicyProvider()
isFocusTraversalPolicyProvider
public final boolean isFocusTraversalPolicyProvider ()
-
Returns whether this container provides focus traversal policy. If this property is set to true then when keyboard focus manager searches container hierarchy for focus traversal policy and encounters this container before any other container with this property as true or focus cycle roots then its focus traversal policy will be used instead of focus cycle root's policy.
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-
Returns:
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true if this container provides focus traversal policy, false otherwise
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Since:
-
1.5
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See Also:
-
setFocusTraversalPolicy(java.awt.FocusTraversalPolicy)
,
getFocusTraversalPolicy()
,
setFocusCycleRoot(boolean)
,
setFocusTraversalPolicyProvider(boolean)
transferFocusDownCycle
public void transferFocusDownCycle()
-
Transfers the focus down one focus traversal cycle. If this Container is a focus cycle root, then the focus owner is set to this Container's default Component to focus, and the current focus cycle root is set to this Container. If this Container is not a focus cycle root, then no focus traversal operation occurs.
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Since:
-
1.4
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See Also:
-
Component.requestFocus()
,
isFocusCycleRoot(java.awt.Container)
,
setFocusCycleRoot(boolean)
applyComponentOrientation
public void applyComponentOrientation(ComponentOrientation o)
-
Sets the ComponentOrientation property of this container and all components contained within it.
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-
Overrides:
-
applyComponentOrientation
in class
Component
-
-
Parameters:
-
o - the new component orientation of this container and the components contained within it.
-
Throws:
-
NullPointerException
- if orientation is null.
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Since:
-
1.4
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See Also:
-
Component.setComponentOrientation(java.awt.ComponentOrientation)
,
Component.getComponentOrientation()
addPropertyChangeListener
public void addPropertyChangeListener(PropertyChangeListener listener)
-
Adds a PropertyChangeListener to the listener list. The listener is registered for all bound properties of this class, including the following:
-
this Container's font ("font")
-
this Container's background color ("background")
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this Container's foreground color ("foreground")
-
this Container's focusability ("focusable")
-
this Container's focus traversal keys enabled state ("focusTraversalKeysEnabled")
-
this Container's Set of FORWARD_TRAVERSAL_KEYS ("forwardFocusTraversalKeys")
-
this Container's Set of BACKWARD_TRAVERSAL_KEYS ("backwardFocusTraversalKeys")
-
this Container's Set of UP_CYCLE_TRAVERSAL_KEYS ("upCycleFocusTraversalKeys")
-
this Container's Set of DOWN_CYCLE_TRAVERSAL_KEYS ("downCycleFocusTraversalKeys")
-
this Container's focus traversal policy ("focusTraversalPolicy")
-
this Container's focus-cycle-root state ("focusCycleRoot")
Note that if this Container is inheriting a bound property, then no event will be fired in response to a change in the inherited property.
If listener is null, no exception is thrown and no action is performed.
-
-
Overrides:
-
addPropertyChangeListener
in class
Component
-
-
Parameters:
-
listener - the PropertyChangeListener to be added
-
See Also:
-
Component.removePropertyChangeListener(java.beans.PropertyChangeListener)
,
addPropertyChangeListener(java.lang.String,java.beans.PropertyChangeListener)
addPropertyChangeListener
public void addPropertyChangeListener(String propertyName,
PropertyChangeListener listener)
-
Adds a PropertyChangeListener to the listener list for a specific property. The specified property may be user-defined, or one of the following defaults:
-
this Container's font ("font")
-
this Container's background color ("background")
-
this Container's foreground color ("foreground")
-
this Container's focusability ("focusable")
-
this Container's focus traversal keys enabled state ("focusTraversalKeysEnabled")
-
this Container's Set of FORWARD_TRAVERSAL_KEYS ("forwardFocusTraversalKeys")
-
this Container's Set of BACKWARD_TRAVERSAL_KEYS ("backwardFocusTraversalKeys")
-
this Container's Set of UP_CYCLE_TRAVERSAL_KEYS ("upCycleFocusTraversalKeys")
-
this Container's Set of DOWN_CYCLE_TRAVERSAL_KEYS ("downCycleFocusTraversalKeys")
-
this Container's focus traversal policy ("focusTraversalPolicy")
-
this Container's focus-cycle-root state ("focusCycleRoot")
-
this Container's focus-traversal-policy-provider state("focusTraversalPolicyProvider")
-
this Container's focus-traversal-policy-provider state("focusTraversalPolicyProvider")
Note that if this Container is inheriting a bound property, then no event will be fired in response to a change in the inherited property.
If listener is null, no exception is thrown and no action is performed.
-
-
Overrides:
-
addPropertyChangeListener
in class
Component
-
-
Parameters:
-
propertyName - one of the property names listed above
-
listener - the PropertyChangeListener to be added
-
See Also:
-
addPropertyChangeListener(java.beans.PropertyChangeListener)
,
Component.removePropertyChangeListener(java.beans.PropertyChangeListener)