InternalFrameFocusTraversalPolicy (Java 2 Platform SE 5.0) - JDK 5 Documentation v1.5.0, Java 2 SDK 英文文档

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Java^TM 2 Platform
Standard Ed. 5.0

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javax.swing
Class InternalFrameFocusTraversalPolicy

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

Direct Known Subclasses:: SortingFocusTraversalPolicy

public abstract class InternalFrameFocusTraversalPolicy
extends FocusTraversalPolicy
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

InternalFrameFocusTraversalPolicy()

Method Summary

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

Methods inherited from class java.awt.FocusTraversalPolicy

getComponentAfter, getComponentBefore, getDefaultComponent, getFirstComponent, getInitialComponent, getLastComponent

Methods inherited from class java.lang.Object

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

Constructor Summary
`InternalFrameFocusTraversalPolicy()`

Method Summary
`Component`	`getInitialComponent(JInternalFrame frame)` Returns the Component that should receive the focus when a JInternalFrame is selected for the first time.

Methods inherited from class java.awt.FocusTraversalPolicy
`getComponentAfter, getComponentBefore, getDefaultComponent, getFirstComponent, getInitialComponent, getLastComponent`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

InternalFrameFocusTraversalPolicy

public InternalFrameFocusTraversalPolicy()

Method Detail

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()