Class InternalFrameFocusTraversalPolicy

java.lang.Object

java.awt.FocusTraversalPolicy

javax.swing.InternalFrameFocusTraversalPolicy

Direct Known Subclasses:

SortingFocusTraversalPolicy

public abstract class InternalFrameFocusTraversalPolicy
extends FocusTraversalPolicy

A FocusTraversalPolicy which can optionally provide an algorithm for determining a JInternalFrame's initial Component. The initial Component is the first to receive focus when the JInternalFrame is first selected. By default, this is the same as the JInternalFrame's default Component to focus.

Since:

1.4

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	InternalFrameFocusTraversalPolicy()	Constructor for subclasses to call.

Method Summary

Modifier and Type	Method	Description
Component	getInitialComponent(JInternalFrame frame)	Returns the Component that should receive the focus when a JInternalFrame is selected for the first time.

Methods declared in class java.awt.FocusTraversalPolicy

getComponentAfter, getComponentBefore, getDefaultComponent, getFirstComponent, getInitialComponent, getLastComponent

Methods declared in class java.lang.Object

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

Constructor Details

InternalFrameFocusTraversalPolicy

protected InternalFrameFocusTraversalPolicy()

Constructor for subclasses to call.

Method Details

getInitialComponent

public Component getInitialComponent(JInternalFrame frame)

Returns the Component that should receive the focus when a JInternalFrame is selected for the first time. Once the JInternalFrame has been selected by a call to setSelected(true), the initial Component will not be used again. Instead, if the JInternalFrame loses and subsequently regains selection, or is made invisible or undisplayable and subsequently made visible and displayable, the JInternalFrame's most recently focused Component will become the focus owner. The default implementation of this method returns the JInternalFrame's default Component to focus.

Parameters:

frame - the JInternalFrame whose initial Component is to be returned

Returns:

the Component that should receive the focus when frame is selected for the first time, or null if no suitable Component can be found

Throws:

IllegalArgumentException - if window is null

See Also:

• JInternalFrame.getMostRecentFocusOwner()