Java java.awt.dnd Class DropTargetContext（JDK8）

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Java™ Platform
Standard Ed. 8

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java.lang.Object
- java.awt.dnd.DropTargetContext

All Implemented Interfaces:

Serializable
```
public class DropTargetContext
extends Object
implements Serializable
```
A DropTargetContext is created whenever the logical cursor associated with a Drag and Drop operation coincides with the visible geometry of a Component associated with a DropTarget. The DropTargetContext provides the mechanism for a potential receiver of a drop operation to both provide the end user with the appropriate drag under feedback, but also to effect the subsequent data transfer if appropriate.

Since:

1.2

See Also:

Serialized Form

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`protected class`	`DropTargetContext.TransferableProxy` `TransferableProxy` is a helper inner class that implements `Transferable` interface and serves as a proxy for another `Transferable` object which represents data transfer for a particular drag-n-drop operation.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`protected void`	`acceptDrag(int dragOperation)` accept the Drag.
`protected void`	`acceptDrop(int dropOperation)` called to signal that the drop is acceptable using the specified operation.
`void`	`addNotify(java.awt.dnd.peer.DropTargetContextPeer dtcp)` Called when associated with the `DropTargetContextPeer`.
`protected Transferable`	`createTransferableProxy(Transferable t, boolean local)` Creates a TransferableProxy to proxy for the specified Transferable.
`void`	`dropComplete(boolean success)` This method signals that the drop is completed and if it was successful or not.
`Component`	`getComponent()` This method returns the `Component` associated with this `DropTargetContext`.
`protected DataFlavor[]`	`getCurrentDataFlavors()` get the available DataFlavors of the `Transferable` operand of this operation.
`protected List<DataFlavor>`	`getCurrentDataFlavorsAsList()` This method returns a the currently available DataFlavors of the `Transferable` operand as a `java.util.List`.
`DropTarget`	`getDropTarget()` This method returns the `DropTarget` associated with this `DropTargetContext`.
`protected int`	`getTargetActions()` This method returns an `int` representing the current actions this `DropTarget` will accept.
`protected Transferable`	`getTransferable()` get the Transferable (proxy) operand of this operation
`protected boolean`	`isDataFlavorSupported(DataFlavor df)` This method returns a `boolean` indicating if the given `DataFlavor` is supported by this `DropTargetContext`.
`protected void`	`rejectDrag()` reject the Drag.
`protected void`	`rejectDrop()` called to signal that the drop is unacceptable.
`void`	`removeNotify()` Called when disassociated with the `DropTargetContextPeer`.
`protected void`	`setTargetActions(int actions)` This method sets the current actions acceptable to this `DropTarget`.

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

- Method Detail
  - getDropTarget
```
public DropTarget getDropTarget()
```
    This method returns the DropTarget associated with this DropTargetContext.
    
    Returns:
    
    the DropTarget associated with this DropTargetContext
  - getComponent
```
public Component getComponent()
```
    This method returns the Component associated with this DropTargetContext.
    
    Returns:
    
    the Component associated with this Context
  - addNotify
```
public void addNotify(java.awt.dnd.peer.DropTargetContextPeer dtcp)
```
    Called when associated with the DropTargetContextPeer.
    
    Parameters:
    
    dtcp - the DropTargetContextPeer
  - removeNotify
```
public void removeNotify()
```
    Called when disassociated with the DropTargetContextPeer.
  - setTargetActions
```
protected void setTargetActions(int actions)
```
    This method sets the current actions acceptable to this DropTarget.
    
    Parameters:
    
    actions - an int representing the supported action(s)
  - getTargetActions
```
protected int getTargetActions()
```
    This method returns an int representing the current actions this DropTarget will accept.
    
    Returns:
    
    the current actions acceptable to this DropTarget
  - dropComplete
```
public void dropComplete(boolean success)
                  throws InvalidDnDOperationException
```
    This method signals that the drop is completed and if it was successful or not.
    
    Parameters:
    
    success - true for success, false if not
    
    Throws:
    
    InvalidDnDOperationException - if a drop is not outstanding/extant
  - acceptDrag
```
protected void acceptDrag(int dragOperation)
```
    accept the Drag.
    
    Parameters:
    
    dragOperation - the supported action(s)
  - rejectDrag
```
protected void rejectDrag()
```
    reject the Drag.
  - acceptDrop
```
protected void acceptDrop(int dropOperation)
```
    called to signal that the drop is acceptable using the specified operation. must be called during DropTargetListener.drop method invocation.
    
    Parameters:
    
    dropOperation - the supported action(s)
  - rejectDrop
```
protected void rejectDrop()
```
    called to signal that the drop is unacceptable. must be called during DropTargetListener.drop method invocation.
  - getCurrentDataFlavors
```
protected DataFlavor[] getCurrentDataFlavors()
```
    get the available DataFlavors of the Transferable operand of this operation.
    
    Returns:
    
    a DataFlavor[] containing the supported DataFlavors of the Transferable operand.
  - getCurrentDataFlavorsAsList
```
protected List<DataFlavor> getCurrentDataFlavorsAsList()
```
    This method returns a the currently available DataFlavors of the Transferable operand as a java.util.List.
    
    Returns:
    
    the currently available DataFlavors as a java.util.List
  - isDataFlavorSupported
```
protected boolean isDataFlavorSupported(DataFlavor df)
```
    This method returns a boolean indicating if the given DataFlavor is supported by this DropTargetContext.
    
    Parameters:
    
    df - the DataFlavor
    
    Returns:
    
    if the DataFlavor specified is supported
  - getTransferable
```
protected Transferable getTransferable()
                                throws InvalidDnDOperationException
```
    get the Transferable (proxy) operand of this operation
    
    Returns:
    
    the Transferable
    
    Throws:
    
    InvalidDnDOperationException - if a drag is not outstanding/extant
  - createTransferableProxy
```
protected Transferable createTransferableProxy(Transferable t,
                                               boolean local)
```
    Creates a TransferableProxy to proxy for the specified Transferable.
    
    Parameters:
    
    t - the Transferable to be proxied
    
    local - true if t represents the result of a local drag-n-drop operation.
    
    Returns:
    
    the new TransferableProxy instance.

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Java java.awt.dnd Class DropTargetContext（JDK8）

Class DropTargetContext

Nested Class Summary

Method Summary

Methods inherited from class java.lang.Object

Method Detail

getDropTarget

getComponent

addNotify

removeNotify

setTargetActions

getTargetActions

dropComplete

acceptDrag

rejectDrag

acceptDrop

rejectDrop

getCurrentDataFlavors

getCurrentDataFlavorsAsList

isDataFlavorSupported

getTransferable

createTransferableProxy