Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class TextLayout.CaretPolicy - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

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Java^TM 2 Platform
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java.awt.font
Class TextLayout.CaretPolicy

java.lang.Object
  |
  +--java.awt.font.TextLayout.CaretPolicy

Enclosing class:: TextLayout

public static class TextLayout.CaretPolicy
extends Object

Defines a policy for determining the strong caret location. This class contains one method, getStrongCaret, which is used to specify the policy that determines the strong caret in dual-caret text. The strong caret is used to move the caret to the left or right. Instances of this class can be passed to getCaretShapes, getNextLeftHit and getNextRightHit to customize strong caret selection.

To specify alternate caret policies, subclass CaretPolicy and override getStrongCaret. getStrongCaret should inspect the two TextHitInfo arguments and choose one of them as the strong caret.

Most clients do not need to use this class.

Constructor Summary

TextLayout.CaretPolicy()
Constructs a CaretPolicy.

Method Summary

TextHitInfo getStrongCaret(TextHitInfo hit1, TextHitInfo hit2, TextLayout layout)
Chooses one of the specified TextHitInfo instances as a strong caret in the specified TextLayout.

Methods inherited from class java.lang.Object

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

Constructor Detail

TextLayout.CaretPolicy

public TextLayout.CaretPolicy()

Constructs a CaretPolicy.

Method Detail

getStrongCaret

public TextHitInfo getStrongCaret(TextHitInfo hit1,
                                  TextHitInfo hit2,
                                  TextLayout layout)

Chooses one of the specified TextHitInfo instances as a strong caret in the specified TextLayout.

Parameters:: hit1 - a valid hit in layout; hit2 - a valid hit in layout; layout - the TextLayout in which hit1 and hit2 are used
Returns:: hit1 or hit2 (or an equivalent TextHitInfo), indicating the strong caret.