CollectionViewValidateDropProposedIndexDropOperationMessage Method (collectionView, draggingInfo, proposedDropIndex, proposedDropOperation)

Invoked to determine a valid drop target.

Original signature is '- (NSDragOperation)collectionView:(NSCollectionView *)collectionView validateDrop:(id < NSDraggingInfo >)draggingInfo proposedIndex:(NSInteger *)proposedDropIndex dropOperation:(NSCollectionViewDropOperation *)proposedDropOperation'

Available in Mac OS X v10.6 and later.

Declaration Syntax

Visual Basic

Visual C++

public NSDragOperation CollectionViewValidateDropProposedIndexDropOperationMessage(
	NSCollectionView collectionView,
	INSDraggingInfo draggingInfo,
	ref NSInteger proposedDropIndex,
	ref NSCollectionViewDropOperation proposedDropOperation
)

Public Function CollectionViewValidateDropProposedIndexDropOperationMessage ( _
	collectionView As NSCollectionView, _
	draggingInfo As INSDraggingInfo, _
	ByRef proposedDropIndex As NSInteger, _
	ByRef proposedDropOperation As NSCollectionViewDropOperation _
) As NSDragOperation

public:
NSDragOperation CollectionViewValidateDropProposedIndexDropOperationMessage(
	NSCollectionView^ collectionView, 
	INSDraggingInfo^ draggingInfo, 
	NSInteger% proposedDropIndex, 
	NSCollectionViewDropOperation% proposedDropOperation
)

Parameters

collectionView (NSCollectionView): The collection view that send the message.

draggingInfo (INSDraggingInfo): An object containing details about this dragging operation.

proposedDropIndex (NSInteger%): The proposed drop index. This parameter is passed by-reference and can be modified retarget the drop operation.

proposedDropOperation (NSCollectionViewDropOperation%): The proposed drop operation. This parameter is passed by-reference and can be modified to change the drop operation.

Return Value

A value that indicates which dragging operation the data source will perform. It must return something other than NSDragOperationNone to accept the drop

Version Information

Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later)

Assembly: Monobjc.AppKit (Module: Monobjc.AppKit)