Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class DnDConstants - 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.dnd
Class DnDConstants

java.lang.Object
  |
  +--java.awt.dnd.DnDConstants

public final class DnDConstants
extends Object

This class contains constant values representing the type of action(s) to be performed by a Drag and Drop operation.

Since:: JDK1.2

Field Summary

static int ACTION_COPY
          An int representing a "copy" action.

static int ACTION_COPY_OR_MOVE
          An int representing a "copy" or "move" action.

static int ACTION_LINK
          An int representing a "link" action.

static int ACTION_MOVE
          An int representing a "move" action.

static int ACTION_NONE
          An int representing no action.

static int ACTION_REFERENCE
          An int representing a "reference" action (synonym for ACTION_LINK).

Methods inherited from class java.lang.Object

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

Field Detail

ACTION_NONE

public static final int ACTION_NONE

An int representing no action.

ACTION_COPY

public static final int ACTION_COPY

An int representing a "copy" action.

ACTION_MOVE

public static final int ACTION_MOVE

An int representing a "move" action.

ACTION_COPY_OR_MOVE

public static final int ACTION_COPY_OR_MOVE

An int representing a "copy" or "move" action.

ACTION_LINK

public static final int ACTION_LINK

An int representing a "link" action. The link verb is found in many, if not all native DnD platforms, and the actual interpretation of LINK semantics is both platform and application dependent. Broadly speaking, the semantic is "do not copy, or move the operand, but create a reference to it". Defining the meaning of "reference" is where ambiguity is introduced. The verb is provided for completeness, but its use is not recommended for DnD operations between logically distinct applications where misinterpretation of the operations semantics could lead to confusing results for the user.

ACTION_REFERENCE

public static final int ACTION_REFERENCE

An int representing a "reference" action (synonym for ACTION_LINK).