1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/widget/windows/nsNativeDragTarget.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,102 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +#ifndef _nsNativeDragTarget_h_
1.9 +#define _nsNativeDragTarget_h_
1.10 +
1.11 +#include "nsCOMPtr.h"
1.12 +#include "nsIDragSession.h"
1.13 +#include <ole2.h>
1.14 +#include <shlobj.h>
1.15 +
1.16 +#ifndef IDropTargetHelper
1.17 +#include <shobjidl.h> // Vista drag image interfaces
1.18 +#undef LogSeverity // SetupAPI.h #defines this as DWORD
1.19 +#endif
1.20 +
1.21 +#include "mozilla/Attributes.h"
1.22 +
1.23 +class nsIDragService;
1.24 +class nsIWidget;
1.25 +
1.26 +struct IDataObject;
1.27 +
1.28 +/*
1.29 + * nsNativeDragTarget implements the IDropTarget interface and gets most of its
1.30 + * behavior from the associated adapter (m_dragDrop).
1.31 + */
1.32 +
1.33 +class nsNativeDragTarget MOZ_FINAL : public IDropTarget
1.34 +{
1.35 +public:
1.36 + nsNativeDragTarget(nsIWidget * aWidget);
1.37 + ~nsNativeDragTarget();
1.38 +
1.39 + // IUnknown members - see iunknown.h for documentation
1.40 + STDMETHODIMP QueryInterface(REFIID, void**);
1.41 + STDMETHODIMP_(ULONG) AddRef();
1.42 + STDMETHODIMP_(ULONG) Release();
1.43 +
1.44 + // IDataTarget members
1.45 +
1.46 + // Set pEffect based on whether this object can support a drop based on
1.47 + // the data available from pSource, the key and mouse states specified
1.48 + // in grfKeyState, and the coordinates specified by point. This is
1.49 + // called by OLE when a drag enters this object's window (as registered
1.50 + // by Initialize).
1.51 + STDMETHODIMP DragEnter(LPDATAOBJECT pSource, DWORD grfKeyState,
1.52 + POINTL point, DWORD* pEffect);
1.53 +
1.54 + // Similar to DragEnter except it is called frequently while the drag
1.55 + // is over this object's window.
1.56 + STDMETHODIMP DragOver(DWORD grfKeyState, POINTL point, DWORD* pEffect);
1.57 +
1.58 + // Release the drag-drop source and put internal state back to the point
1.59 + // before the call to DragEnter. This is called when the drag leaves
1.60 + // without a drop occurring.
1.61 + STDMETHODIMP DragLeave();
1.62 +
1.63 + // If point is within our region of interest and pSource's data supports
1.64 + // one of our formats, get the data and set pEffect according to
1.65 + // grfKeyState (DROPEFFECT_MOVE if the control key was not pressed,
1.66 + // DROPEFFECT_COPY if the control key was pressed). Otherwise return
1.67 + // E_FAIL.
1.68 + STDMETHODIMP Drop(LPDATAOBJECT pSource, DWORD grfKeyState,
1.69 + POINTL point, DWORD* pEffect);
1.70 + /**
1.71 + * Cancel the current drag session, if any.
1.72 + */
1.73 + void DragCancel();
1.74 +
1.75 +protected:
1.76 +
1.77 + void GetGeckoDragAction(DWORD grfKeyState, LPDWORD pdwEffect,
1.78 + uint32_t * aGeckoAction);
1.79 + void ProcessDrag(uint32_t aEventType, DWORD grfKeyState,
1.80 + POINTL pt, DWORD* pdwEffect);
1.81 + void DispatchDragDropEvent(uint32_t aType, POINTL pt);
1.82 + void AddLinkSupportIfCanBeGenerated(LPDATAOBJECT aIDataSource);
1.83 +
1.84 + // Native Stuff
1.85 + ULONG m_cRef; // reference count
1.86 + HWND mHWnd;
1.87 + DWORD mEffectsAllowed;
1.88 + DWORD mEffectsPreferred;
1.89 + bool mTookOwnRef;
1.90 +
1.91 + // Gecko Stuff
1.92 + nsIWidget * mWidget;
1.93 + nsIDragService * mDragService;
1.94 + // Drag target helper
1.95 + IDropTargetHelper * GetDropTargetHelper();
1.96 +
1.97 +
1.98 +private:
1.99 + // Drag target helper
1.100 + IDropTargetHelper * mDropTargetHelper;
1.101 +};
1.102 +
1.103 +#endif // _nsNativeDragTarget_h_
1.104 +
1.105 +
