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132 lines
4.6 KiB
C++
132 lines
4.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef _nsNativeDragTarget_h_
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#define _nsNativeDragTarget_h_
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#include "nsCOMPtr.h"
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#include "nsIDragSession.h"
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#include <ole2.h>
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#include <shlobj.h>
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#ifndef IDropTargetHelper
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#include <shobjidl.h> // Vista drag image interfaces
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#endif
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class nsIDragService;
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class nsIWidget;
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struct IDataObject;
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/*
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* nsNativeDragTarget implements the IDropTarget interface and gets most of its
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* behavior from the associated adapter (m_dragDrop).
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*/
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class nsNativeDragTarget : public IDropTarget
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{
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public:
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nsNativeDragTarget(nsIWidget * aWnd);
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~nsNativeDragTarget();
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// IUnknown members - 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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// IDataTarget members
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// Set pEffect based on whether this object can support a drop based on
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// the data available from pSource, the key and mouse states specified
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// in grfKeyState, and the coordinates specified by point. This is
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// called by OLE when a drag enters this object's window (as registered
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// by Initialize).
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STDMETHODIMP DragEnter(LPDATAOBJECT pSource, DWORD grfKeyState,
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POINTL point, DWORD* pEffect);
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// Similar to DragEnter except it is called frequently while the drag
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// is over this object's window.
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STDMETHODIMP DragOver(DWORD grfKeyState, POINTL point, DWORD* pEffect);
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// Release the drag-drop source and put internal state back to the point
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// before the call to DragEnter. This is called when the drag leaves
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// without a drop occurring.
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STDMETHODIMP DragLeave();
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// If point is within our region of interest and pSource's data supports
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// one of our formats, get the data and set pEffect according to
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// grfKeyState (DROPEFFECT_MOVE if the control key was not pressed,
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// DROPEFFECT_COPY if the control key was pressed). Otherwise return
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// E_FAIL.
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STDMETHODIMP Drop(LPDATAOBJECT pSource, DWORD grfKeyState,
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POINTL point, DWORD* pEffect);
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/**
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* Cancel the current drag session, if any.
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*/
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void DragCancel();
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protected:
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void GetGeckoDragAction(DWORD grfKeyState, LPDWORD pdwEffect,
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PRUint32 * aGeckoAction);
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void ProcessDrag(PRUint32 aEventType, DWORD grfKeyState,
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POINTL pt, DWORD* pdwEffect);
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void DispatchDragDropEvent(PRUint32 aType, POINTL pt);
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void AddLinkSupportIfCanBeGenerated(LPDATAOBJECT aIDataSource);
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// Native Stuff
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ULONG m_cRef; // reference count
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HWND mHWnd;
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DWORD mEffectsAllowed;
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DWORD mEffectsPreferred;
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bool mTookOwnRef;
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// Gecko Stuff
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nsIWidget * mWindow;
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nsIDragService * mDragService;
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// Drag target helper
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IDropTargetHelper * GetDropTargetHelper();
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private:
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// Drag target helper
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IDropTargetHelper * mDropTargetHelper;
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};
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#endif // _nsNativeDragTarget_h_
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