java.awt

Class FocusTraversalPolicy

Known Direct Subclasses:
ContainerOrderFocusTraversalPolicy, InternalFrameFocusTraversalPolicy

public abstract class FocusTraversalPolicy
extends Object

Since:
1.4

Constructor Summary

FocusTraversalPolicy()
Creates a FocusTraversalPolicy object.

Method Summary

abstract Component
getComponentAfter(Container root, Component current)
Returns the Component that should receive the focus after a Component.
abstract Component
getComponentBefore(Container root, Component current)
Returns the Component that should receive the focus before a Component.
abstract Component
getDefaultComponent(Container root)
Returns the default Component to focus.
abstract Component
getFirstComponent(Container root)
Returns the first Component in the traversal cycle.
Component
getInitialComponent(Window window)
Returns the Component that should receive the focus when a Window is made visible for the first time.
abstract Component
getLastComponent(Container root)
Returns the last Component in the traversal cycle.

Methods inherited from class java.lang.Object

clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

FocusTraversalPolicy

public FocusTraversalPolicy()
Creates a FocusTraversalPolicy object.

Method Details

getComponentAfter

public abstract Component getComponentAfter(Container root,
                                            Component current)
Returns the Component that should receive the focus after a Component.
Throws:
IllegalArgumentException - If root or current is null, or if root is not a focus cycle root of current.

getComponentBefore

public abstract Component getComponentBefore(Container root,
                                             Component current)
Returns the Component that should receive the focus before a Component.
Throws:
IllegalArgumentException - If root or current is null, or if root is not a focus cycle root of current.

getDefaultComponent

public abstract Component getDefaultComponent(Container root)
Returns the default Component to focus.
Throws:
IllegalArgumentException - If root is null.

getFirstComponent

public abstract Component getFirstComponent(Container root)
Returns the first Component in the traversal cycle.
Throws:
IllegalArgumentException - If root is null.

getInitialComponent

public Component getInitialComponent(Window window)
Returns the Component that should receive the focus when a Window is made visible for the first time.
Throws:
IllegalArgumentException - If window is null.

getLastComponent

public abstract Component getLastComponent(Container root)
Returns the last Component in the traversal cycle.
Throws:
IllegalArgumentException - If root is null.

FocusTraversalPolicy.java -- Copyright (C) 2002 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.