com.klg.jclass.higrid
Class FocusManager

java.lang.Object
  |
  +--com.klg.jclass.higrid.FocusManager

All Implemented Interfaces:

FocusModel, Serializable

Direct Known Subclasses:

FocusManagerNew, FocusManagerOld

public abstract class FocusManager

extends Object

implements FocusModel, Serializable

Since in JDK1.4, a different focus mechanism is used, an object implementing the FocusModel interface is required to use the correct mechanism for the current environment.

See Also:

Serialized Form

Field Summary

protected com.klg.jclass.higrid.GridArea

gridArea

Method Summary

abstract Component	findFocusOwner(Component c) Return the child Component of the specified Component that is the focus owner, if any.
com.klg.jclass.higrid.GridArea	getGridArea() Return the gridArea for this focus manager
abstract boolean	isFocusTraversable(Component c) Can this component receive the focus
boolean	requestFocus() This method does nothing and is meant to be overridden
boolean	requestFocus(Component c) This method does nothing and is meant to be overridden
void	setGridArea(com.klg.jclass.higrid.GridArea gridArea) Set the gridArea that uses this focus manager

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

Method Detail

getGridArea

public com.klg.jclass.higrid.GridArea getGridArea()

Return the gridArea for this focus manager

Specified by:

getGridArea in interface FocusModel

Returns:

The gridArea that uses this focus manager

setGridArea

public void setGridArea(com.klg.jclass.higrid.GridArea gridArea)

Set the gridArea that uses this focus manager

Specified by:

setGridArea in interface FocusModel

Parameters:

gridArea - The new gridArea that uses this focus manager

requestFocus

public boolean requestFocus(Component c)

This method does nothing and is meant to be overridden

Specified by:

requestFocus in interface FocusModel

Parameters:

c - The component on which to request focus

Returns:

Always returns true

requestFocus

public boolean requestFocus()

This method does nothing and is meant to be overridden

Specified by:

requestFocus in interface FocusModel

Returns:

Always returns true

isFocusTraversable

public abstract boolean isFocusTraversable(Component c)

Can this component receive the focus

Specified by:

isFocusTraversable in interface FocusModel

Parameters:

c - The component whose focusability is in question

Returns:

Whether the component can receive focus

findFocusOwner

public abstract Component findFocusOwner(Component c)

Return the child Component of the specified Component that is the focus owner, if any.

Specified by:

findFocusOwner in interface FocusModel

Parameters:

c - the root of the Component hierarchy to search for the focus owner

Returns:

the focus owner, or null if there is no focus owner, or if the focus owner is not c, or a descendant of c