gecko-dev/widget/src/windows/nsDragService.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#include "nsDragService.h"
#include "nsIDragSource.h"
#include "nsITransferable.h"
#include "nsDragSource.h"
#include "nsDataObj.h"
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#include "nsTransferable.h"
#include "nsIServiceManager.h"
#include "nsWidgetsCID.h"
#include "nsIClipboard.h"
#include "nsClipboard.h"
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#include "OLEIDL.h"
#include "OLE2.h"
static NS_DEFINE_IID(kIDragServiceIID, NS_IDRAGSERVICE_IID);
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static NS_DEFINE_IID(kIClipboardIID, NS_ICLIPBOARD_IID);
static NS_DEFINE_CID(kCClipboardCID, NS_CLIPBOARD_CID);
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NS_IMPL_ADDREF(nsDragService)
NS_IMPL_RELEASE(nsDragService)
//-------------------------------------------------------------------------
//
// DragService constructor
//
//-------------------------------------------------------------------------
nsDragService::nsDragService()
{
NS_INIT_REFCNT();
mDragSource = nsnull;
}
//-------------------------------------------------------------------------
//
// DragService destructor
//
//-------------------------------------------------------------------------
nsDragService::~nsDragService()
{
NS_IF_RELEASE(mDragSource);
}
/**
* @param aIID The name of the class implementing the method
* @param _classiiddef The name of the #define symbol that defines the IID
* for the class (e.g. NS_ISUPPORTS_IID)
*
*/
nsresult nsDragService::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
if (NULL == aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
nsresult rv = NS_NOINTERFACE;
if (aIID.Equals(kIDragServiceIID)) {
*aInstancePtr = (void*) ((nsIDragService*)this);
NS_ADDREF_THIS();
return NS_OK;
}
return rv;
}
NS_IMETHODIMP nsDragService::StartDragSession (nsIDragSource * aDragSrc,
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nsPoint * aStartLocation,
nsPoint * aImageOffset,
nsIImage * aImage,
PRBool aDoFlyback)
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{
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NS_IF_RELEASE(mDragSource);
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mDragSource = aDragSrc;
NS_ADDREF(mDragSource);
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nsIClipboard* clipboard;
nsresult rv = nsServiceManager::GetService(kCClipboardCID,
kIClipboardIID,
(nsISupports **)&clipboard);
if (NS_OK == rv) {
nsITransferable * trans;
mDragSource->GetTransferable(&trans);
IDataObject * dataObj;
((nsClipboard *)clipboard)->CreateNativeDataObject(trans, &dataObj);
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DWORD dropRes;
HRESULT res = 0;
res = ::DoDragDrop(dataObj,
(IDropSource *)((nsDragSource *)mDragSource)->GetNativeDragSrc(),
DROPEFFECT_COPY | DROPEFFECT_MOVE | DROPEFFECT_SCROLL, &dropRes);
}
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return NS_OK;
}