gecko/widget/windows/nsNativeDragSource.h

98 lines
3.4 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
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*
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* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
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* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
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*
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#ifndef _nsNativeDragSource_h_
#define _nsNativeDragSource_h_
#include "nscore.h"
#include "nsIDOMDataTransfer.h"
#include "nsCOMPtr.h"
#include <ole2.h>
#include <oleidl.h>
//class nsIDragSource;
/*
* nsNativeDragSource implements the IDropSource interface and gets
* most of its behavior from the associated adapter (m_dragDrop).
*/
class nsNativeDragSource : public IDropSource
{
public:
// construct an nsNativeDragSource referencing adapter
// nsNativeDragSource(nsIDragSource * adapter);
nsNativeDragSource(nsIDOMDataTransfer* aDataTransfer);
~nsNativeDragSource();
// IUnknown methods - see iunknown.h for documentation
STDMETHODIMP QueryInterface(REFIID, void**);
STDMETHODIMP_(ULONG) AddRef();
STDMETHODIMP_(ULONG) Release();
// IDropSource methods - see idropsrc.h for documentation
// Return DRAGDROP_S_USEDEFAULTCURSORS if this object lets OLE provide
// default cursors, otherwise return NOERROR. This method gets called in
// response to changes that the target makes to dEffect (DragEnter,
// DragOver).
STDMETHODIMP GiveFeedback(DWORD dEffect);
// This method gets called if there is any change in the mouse or key
// state. Return DRAGDROP_S_CANCEL to stop the drag, DRAGDROP_S_DROP
// to execute the drop, otherwise NOERROR.
STDMETHODIMP QueryContinueDrag(BOOL fESC, DWORD grfKeyState);
bool UserCancelled() { return mUserCancelled; }
protected:
// Reference count
ULONG m_cRef;
// Data object, hold information about cursor state
nsCOMPtr<nsIDOMDataTransfer> mDataTransfer;
// Custom drag cursor
HCURSOR m_hCursor;
// true if the user cancelled the drag by pressing escape
bool mUserCancelled;
};
#endif // _nsNativeDragSource_h_