| NSDraggingDestination |
Mac OS X 10.0 |
This informal protocol declares methods for objects to implement if
they need to receive dragging operations. Several of the methods of
NSDraggingDestination are implemented to respond
to the movement of the drag operation of an destination
object, while the remainder are implemented to execute and complete
the dragging operation. Completing a drag operation involves
retrieving and handling the data appropriately. To retrieve the data
one must first obtain the NSPasteboard object in
which the data is stored, for a dragging operation only knows about
this pasteboard, not the data itself. The pasteboard may be obtained
with the draggingPasteboard method. This is
declared by the NSDraggingInfo protocol, and all
dragging operation objects conform to this protocol. See the
NSDraggingInfo protocol description and
NSPasteboard class description for more
information.
@interface NSObject (NSDraggingDestination)
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// Instance Methods |
- (NSDragOperation)draggingEntered:(id <NSDraggingInfo>)sender;
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- (NSDragOperation)draggingUpdated:(id <NSDraggingInfo>)sender;
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- (void)draggingExited:(id <NSDraggingInfo>)sender;
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- (BOOL)prepareForDragOperation:(id <NSDraggingInfo>)sender;
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- (BOOL)performDragOperation:(id <NSDraggingInfo>)sender;
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- (void)concludeDragOperation:(id <NSDraggingInfo>)sender;
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- (void)draggingEnded:(id <NSDraggingInfo>)sender;
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@end
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