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