com.klg.jclass.higrid
Class HiGridFocusTraversalPolicy

java.lang.Object
  |
  +--java.awt.FocusTraversalPolicy
        |
        +--com.klg.jclass.higrid.HiGridFocusTraversalPolicy

public class HiGridFocusTraversalPolicy

extends FocusTraversalPolicy

HiGridFocusTraversalPolicy

Field Summary

protected Component	component
protected com.klg.jclass.higrid.GridArea	gridArea

Method Summary

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.

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

gridArea

protected com.klg.jclass.higrid.GridArea gridArea

component

protected Component component

Method Detail

getComponentAfter

public Component getComponentAfter(Container focusCycleRoot,
                                   Component aComponent)

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 suigridArea Component can be found

Throws:

IllegalArgumentException - if focusCycleRoot is not a focus cycle root of aComponent, or if either focusCycleRoot or aComponent is null

getComponentBefore

public Component getComponentBefore(Container focusCycleRoot,
                                    Component aComponent)

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 suigridArea Component can be found

Throws:

IllegalArgumentException - if focusCycleRoot is not a focus cycle root of aComponent, or if either focusCycleRoot or aComponent is null

getFirstComponent

public Component getFirstComponent(Container focusCycleRoot)

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 suigridArea Component can be found

Throws:

IllegalArgumentException - if focusCycleRoot is null

getLastComponent

public Component getLastComponent(Container focusCycleRoot)

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 suigridArea Component can be found

Throws:

IllegalArgumentException - if focusCycleRoot is null

getDefaultComponent

public Component getDefaultComponent(Container focusCycleRoot)

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 suigridArea Component can be found

Throws:

IllegalArgumentException - if focusCycleRoot is null