IDropTargetCallback Class Reference

#include <IDropTargetCallback.h>

Inheritance diagram for IDropTargetCallback:

Public Types
enum	eCallbackState { kTargetEntered = 0, kTargetWithin = 1, kTargetLeft = 2 }

Public Member Functions
virtual void	TrackingCallback (eCallbackState state, const PMPoint &localPt, PMRect &rect)=0
Public Member Functions inherited from IPMUnknown
virtual IPMUnknown *	QueryInterface (PMIID interfaceID) const =0
virtual void	AddRef () const =0
virtual void	Release () const =0

Detailed Description

IDropTargetCallback allows drag drop targets to directly notify other objects during the drag tracking process.

See Also

IDragDropTarget::RegisterTargetCallback, IDragDropTarget::ReleaseTargetCallback

Member Enumeration Documentation

enum IDropTargetCallback::eCallbackState

constants for indicating the current phase of the drag

Enumerator
kTargetEntered	drag has entered the target
kTargetWithin	drag is moving within the target
kTargetLeft	drag has left the target

Member Function Documentation

virtual void IDropTargetCallback::TrackingCallback ( eCallbackState  state, const PMPoint &  localPt, PMRect &  rect  )

pure virtual

Callback for drag tracking. The localPt parameter is only valid in the kTargetWithin state, which is called periodically as the mouse moves within the target.

Parameters

state	IN the current state of the drag
localPt	IN current mouse location within the target
rect	IN bounds of the drag feedback