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JavaTM 2 Platform Std. Ed. v1.3.1 |
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java.lang.Object | +--com.apple.mrj.dnd.Drag | +--com.apple.mrj.dnd.OutgoingDrag
The context for the source of a Mac OS drag-and-drop operation. It extends the Drag class to add the ability to create items and flavors.
How an OutgoingDrag is obtained depends on the host framework. When
a user gesture occurs that can initiate a drag, the framework will present
you with an OutgoingDrag object. If you want to initiate a drag, you then
call addFlavor
one or more times to add items and data "flavors".
The framework will take care of tracking the drag for you.
Specifically, if using AWT, you add a DragInitiatorListener to a Component
to be notified of drag gestures within that Component -- the listener's
dragGesture
method will be called upon such a gesture, and you can
get an OutgoingDrag instance from the DragInitiatorEvent parameter.
Method Summary | |
void |
addItem(Transferable item)
Deprecated. |
void |
dispose()
Deprecated. Marks this Drag as no longer usable. |
void |
finalize()
Deprecated. Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. |
Cursor |
getCursor()
Deprecated. |
void |
setCursor(Cursor c)
Deprecated. |
void |
setImage(Image image,
com.apple.mrj.macos.generated.PointStruct globalLocation)
Deprecated. Sets the image used for the drag and draws it starting from the given location. |
Methods inherited from class com.apple.mrj.dnd.Drag |
allItemsContainFlavors, check, equals, equals, findItemFlavor, getDestination, getHasLeftSource, getInsideSenderWindow, getItem, getItemCount, getRef, getSource, hashCode, isDisposed, isDropAccepted, toString |
Methods inherited from class java.lang.Object |
clone, getClass, notify, notifyAll, wait, wait, wait |
Method Detail |
public void finalize()
Object
finalize
method to dispose of
system resources or to perform other cleanup.
The general contract of finalize is that it is invoked if and when the JavaTM virtual machine has determined that there is no longer any means by which this object can be accessed by any thread that has not yet died, except as a result of an action taken by the finalization of some other object or class which is ready to be finalized. The finalize method may take any action, including making this object available again to other threads; the usual purpose of finalize, however, is to perform cleanup actions before the object is irrevocably discarded. For example, the finalize method for an object that represents an input/output connection might perform explicit I/O transactions to break the connection before the object is permanently discarded.
The finalize method of class Object performs no special action; it simply returns normally. Subclasses of Object may override this definition.
The Java programming language does not guarantee which thread will invoke the finalize method for any given object. It is guaranteed, however, that the thread that invokes finalize will not be holding any user-visible synchronization locks when finalize is invoked. If an uncaught exception is thrown by the finalize method, the exception is ignored and finalization of that object terminates.
After the finalize method has been invoked for an object, no further action is taken until the Java virtual machine has again determined that there is no longer any means by which this object can be accessed by any thread that has not yet died, including possible actions by other objects or classes which are ready to be finalized, at which point the object may be discarded.
The finalize method is never invoked more than once by a Java virtual machine for any given object.
Any exception thrown by the finalize
method causes
the finalization of this object to be halted, but is otherwise
ignored.
finalize
in class Object
java.lang.Object
Throwable
- the Exception
raised by this methodpublic void dispose()
Drag
dispose
in class Drag
public void addItem(Transferable item)
public void setCursor(Cursor c)
public Cursor getCursor()
public void setImage(Image image, com.apple.mrj.macos.generated.PointStruct globalLocation)
image
- The image to use for the dragglobalLocation
- The location, in global coordinates, at which
to initially draw the image
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JavaTM 2 Platform Std. Ed. v1.3.1 |
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