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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef _nsNativeDragSource_h_
#define _nsNativeDragSource_h_
#include "nscore.h"
#include <ole2.h>
#include <oleidl.h>
#include "mozilla/Attributes.h"
#include "mozilla/RefPtr.h"
namespace mozilla {
namespace dom {
class DataTransfer;
} // namespace dom
} // namespace mozilla
// class nsIDragSource;
/*
* nsNativeDragSource implements the IDropSource interface and gets
* most of its behavior from the associated adapter (m_dragDrop).
*/
class nsNativeDragSource final : public IDropSource {
public:
// construct an nsNativeDragSource referencing adapter
// nsNativeDragSource(nsIDragSource * adapter);
explicit nsNativeDragSource(mozilla::dom::DataTransfer* 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
RefPtr<mozilla::dom::DataTransfer> mDataTransfer;
// Custom drag cursor
HCURSOR m_hCursor;
// true if the user cancelled the drag by pressing escape
bool mUserCancelled;
};
#endif // _nsNativeDragSource_h_