javax.swing
Class LegacyGlueFocusTraversalPolicy

java.lang.Object
  java.awt.FocusTraversalPolicy
      javax.swing.LegacyGlueFocusTraversalPolicy

All Implemented Interfaces:

Serializable

final class LegacyGlueFocusTraversalPolicy

extends FocusTraversalPolicy

implements Serializable

A FocusTraversalPolicy which provides support for legacy applications which handle focus traversal via JComponent.setNextFocusableComponent or by installing a custom DefaultFocusManager. If a specific traversal has not been hard coded, then that traversal is provided either by the custom DefaultFocusManager, or by a wrapped FocusTraversalPolicy instance.

Author:

David Mendenhall

Field Summary

private HashMap	backwardMap
private DefaultFocusManager	delegateManager
private FocusTraversalPolicy	delegatePolicy
private HashMap	forwardMap

Constructor Summary

(package private)	LegacyGlueFocusTraversalPolicy(DefaultFocusManager delegateManager)
(package private)	LegacyGlueFocusTraversalPolicy(FocusTraversalPolicy delegatePolicy)

Method Summary

private boolean	accept(Component aComponent)
Component	getComponentAfter(Container focusCycleRoot, Component aComponent) Returns the Component that should receive the focus after aComponent.
Component	getComponentBefore(Container focusCycleRoot, Component aComponent) Returns the Component that should receive the focus before aComponent.
Component	getDefaultComponent(Container focusCycleRoot) Returns the default Component to focus.
Component	getFirstComponent(Container focusCycleRoot) Returns the first Component in the traversal cycle.
Component	getLastComponent(Container focusCycleRoot) Returns the last Component in the traversal cycle.
private void	readObject(ObjectInputStream in)
(package private) void	setNextFocusableComponent(Component left, Component right)
(package private) void	unsetNextFocusableComponent(Component left, Component right)
private void	writeObject(ObjectOutputStream out)

Methods inherited from class java.awt.FocusTraversalPolicy

getInitialComponent

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

delegatePolicy

private transient FocusTraversalPolicy delegatePolicy

delegateManager

private transient DefaultFocusManager delegateManager

forwardMap

private HashMap forwardMap

backwardMap

private HashMap backwardMap

Constructor Detail

LegacyGlueFocusTraversalPolicy

LegacyGlueFocusTraversalPolicy(FocusTraversalPolicy delegatePolicy)

LegacyGlueFocusTraversalPolicy

LegacyGlueFocusTraversalPolicy(DefaultFocusManager delegateManager)

Method Detail

setNextFocusableComponent

void setNextFocusableComponent(Component left,
                               Component right)

unsetNextFocusableComponent

void unsetNextFocusableComponent(Component left,
                                 Component right)

getComponentAfter

public Component getComponentAfter(Container focusCycleRoot,
                                   Component aComponent)

Description copied from class: FocusTraversalPolicy

Returns the Component that should receive the focus after aComponent. focusCycleRoot must be a focus cycle root of aComponent.

Specified by:

getComponentAfter in class FocusTraversalPolicy

Parameters:

focusCycleRoot - a focus cycle root of aComponent

aComponent - a (possibly indirect) child of focusCycleRoot, or focusCycleRoot itself

Returns:

the Component that should receive the focus after aComponent, or null if no suitable Component can be found

getComponentBefore

public Component getComponentBefore(Container focusCycleRoot,
                                    Component aComponent)

Description copied from class: FocusTraversalPolicy

Returns the Component that should receive the focus before aComponent. focusCycleRoot must be a focus cycle root of aComponent.

Specified by:

getComponentBefore in class FocusTraversalPolicy

Parameters:

focusCycleRoot - a focus cycle root of aComponent

aComponent - a (possibly indirect) child of focusCycleRoot, or focusCycleRoot itself

Returns:

the Component that should receive the focus before aComponent, or null if no suitable Component can be found

getFirstComponent

public Component getFirstComponent(Container focusCycleRoot)

Description copied from class: FocusTraversalPolicy

Returns the first Component in the traversal cycle. This method is used to determine the next Component to focus when traversal wraps in the forward direction.

Specified by:

getFirstComponent in class FocusTraversalPolicy

Parameters:

focusCycleRoot - the focus cycle root whose first Component is to be returned

Returns:

the first Component in the traversal cycle when focusCycleRoot is the focus cycle root, or null if no suitable Component can be found

getLastComponent

public Component getLastComponent(Container focusCycleRoot)

Description copied from class: FocusTraversalPolicy

Returns the last Component in the traversal cycle. This method is used to determine the next Component to focus when traversal wraps in the reverse direction.

Specified by:

getLastComponent in class FocusTraversalPolicy

Parameters:

focusCycleRoot - the focus cycle root whose last Component is to be returned

Returns:

the last Component in the traversal cycle when focusCycleRoot is the focus cycle root, or null if no suitable Component can be found

getDefaultComponent

public Component getDefaultComponent(Container focusCycleRoot)

Description copied from class: FocusTraversalPolicy

Returns the default Component to focus. This Component will be the first to receive focus when traversing down into a new focus traversal cycle rooted at focusCycleRoot.

Specified by:

getDefaultComponent in class FocusTraversalPolicy

Parameters:

focusCycleRoot - the focus cycle root whose default Component is to be returned

Returns:

the default Component in the traversal cycle when focusCycleRoot is the focus cycle root, or null if no suitable Component can be found

accept

private boolean accept(Component aComponent)

writeObject

private void writeObject(ObjectOutputStream out)
                  throws IOException

Throws:

IOException

readObject

private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException

Throws:

IOException

ClassNotFoundException