michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: #ifndef _nsNativeDragSource_h_
michael@0: #define _nsNativeDragSource_h_
michael@0: 
michael@0: #include "nscore.h"
michael@0: #include "nsIDOMDataTransfer.h"
michael@0: #include "nsCOMPtr.h"
michael@0: #include <ole2.h>
michael@0: #include <oleidl.h>
michael@0: #include "mozilla/Attributes.h"
michael@0: 
michael@0: //class nsIDragSource;
michael@0: 
michael@0: /*
michael@0:  * nsNativeDragSource implements the IDropSource interface and gets
michael@0:  * most of its behavior from the associated adapter (m_dragDrop).
michael@0:  */
michael@0: class nsNativeDragSource MOZ_FINAL : public IDropSource
michael@0: {
michael@0: public:
michael@0: 
michael@0:   // construct an nsNativeDragSource referencing adapter
michael@0:   // nsNativeDragSource(nsIDragSource * adapter);
michael@0:   nsNativeDragSource(nsIDOMDataTransfer* aDataTransfer);
michael@0:   ~nsNativeDragSource();
michael@0: 
michael@0:   // IUnknown methods - see iunknown.h for documentation
michael@0: 
michael@0:   STDMETHODIMP QueryInterface(REFIID, void**);
michael@0:   STDMETHODIMP_(ULONG) AddRef();
michael@0:   STDMETHODIMP_(ULONG) Release();
michael@0: 
michael@0:   // IDropSource methods - see idropsrc.h for documentation
michael@0: 
michael@0:   // Return DRAGDROP_S_USEDEFAULTCURSORS if this object lets OLE provide
michael@0:   // default cursors, otherwise return NOERROR. This method gets called in
michael@0:   // response to changes that the target makes to dEffect (DragEnter,
michael@0:   // DragOver).
michael@0:   STDMETHODIMP GiveFeedback(DWORD dEffect);
michael@0: 
michael@0:   // This method gets called if there is any change in the mouse or key
michael@0:   // state.  Return DRAGDROP_S_CANCEL to stop the drag, DRAGDROP_S_DROP
michael@0:   // to execute the drop, otherwise NOERROR.
michael@0:   STDMETHODIMP QueryContinueDrag(BOOL fESC, DWORD grfKeyState);
michael@0: 
michael@0:   bool UserCancelled() { return mUserCancelled; }
michael@0: 
michael@0: protected:
michael@0:   // Reference count
michael@0:   ULONG m_cRef;
michael@0: 
michael@0:   // Data object, hold information about cursor state
michael@0:   nsCOMPtr<nsIDOMDataTransfer> mDataTransfer;
michael@0: 
michael@0:   // Custom drag cursor
michael@0:   HCURSOR m_hCursor;
michael@0: 
michael@0:   // true if the user cancelled the drag by pressing escape
michael@0:   bool mUserCancelled;
michael@0: };
michael@0: 
michael@0: #endif // _nsNativeDragSource_h_
michael@0: