win32_dragdrop.cpp
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上传日期:2009-03-27
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- /*****************************************************************************
- * win32_dragdrop.cpp
- *****************************************************************************
- * Copyright (C) 2003 VideoLAN
- * $Id: win32_dragdrop.cpp 6961 2004-03-05 17:34:23Z sam $
- *
- * Authors: Cyril Deguet <asmax@via.ecp.fr>
- * Olivier Teuli鑢e <ipkiss@via.ecp.fr>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- #ifdef WIN32_SKINS
- #include <windows.h>
- #include "win32_dragdrop.hpp"
- #include "../commands/cmd_add_item.hpp"
- Win32DragDrop::Win32DragDrop( intf_thread_t *pIntf, bool playOnDrop ):
- SkinObject( pIntf ), IDropTarget(), m_references( 1 ),
- m_playOnDrop( playOnDrop )
- {
- }
- STDMETHODIMP Win32DragDrop::QueryInterface( REFIID iid, void FAR* FAR* ppv )
- {
- // Tell other objects about our capabilities
- if( iid == IID_IUnknown || iid == IID_IDropTarget )
- {
- *ppv = this;
- AddRef();
- return S_OK;
- }
- *ppv = NULL;
- return ResultFromScode( E_NOINTERFACE );
- }
- STDMETHODIMP_(ULONG) Win32DragDrop::AddRef()
- {
- return ++m_references;
- }
- STDMETHODIMP_(ULONG) Win32DragDrop::Release()
- {
- if( --m_references == 0 )
- {
- delete this;
- return 0;
- }
- return m_references;
- }
- STDMETHODIMP Win32DragDrop::DragEnter( LPDATAOBJECT pDataObj,
- DWORD grfKeyState, POINTL pt, DWORD *pdwEffect )
- {
- FORMATETC fmtetc;
- fmtetc.cfFormat = CF_HDROP;
- fmtetc.ptd = NULL;
- fmtetc.dwAspect = DVASPECT_CONTENT;
- fmtetc.lindex = -1;
- fmtetc.tymed = TYMED_HGLOBAL;
- // Check that the drag source provides CF_HDROP,
- // which is the only format we accept
- if( pDataObj->QueryGetData( &fmtetc ) == S_OK )
- {
- *pdwEffect = DROPEFFECT_COPY;
- }
- else
- {
- *pdwEffect = DROPEFFECT_NONE;
- }
- return S_OK;
- }
- STDMETHODIMP Win32DragDrop::DragOver( DWORD grfKeyState, POINTL pt,
- DWORD *pdwEffect )
- {
- // For visual feedback
- return S_OK;
- }
- STDMETHODIMP Win32DragDrop::DragLeave()
- {
- // Remove visual feedback
- return S_OK;
- }
- STDMETHODIMP Win32DragDrop::Drop( LPDATAOBJECT pDataObj, DWORD grfKeyState,
- POINTL pt, DWORD *pdwEffect )
- {
- // User has dropped on us -- get the CF_HDROP data from drag source
- FORMATETC fmtetc;
- fmtetc.cfFormat = CF_HDROP;
- fmtetc.ptd = NULL;
- fmtetc.dwAspect = DVASPECT_CONTENT;
- fmtetc.lindex = -1;
- fmtetc.tymed = TYMED_HGLOBAL;
- STGMEDIUM medium;
- HRESULT hr = pDataObj->GetData( &fmtetc, &medium );
- if( !FAILED(hr) )
- {
- // Grab a pointer to the data
- HGLOBAL HFiles = medium.hGlobal;
- HDROP HDrop = (HDROP)GlobalLock( HFiles );
- // Notify VLC of the drop
- HandleDrop( HDrop );
- // Release the pointer to the memory
- GlobalUnlock( HFiles );
- // ReleaseStgMedium( &medium );
- }
- else
- {
- *pdwEffect = DROPEFFECT_NONE;
- return hr;
- }
- return S_OK;
- }
- void Win32DragDrop::HandleDrop( HDROP HDrop )
- {
- // Get the number of dropped files
- int nbFiles = DragQueryFile( HDrop, 0xFFFFFFFF, NULL, 0 );
- // For each dropped file
- for( int i = 0; i < nbFiles; i++ )
- {
- // Get the name of the file
- int nameLength = DragQueryFile( HDrop, i, NULL, 0 ) + 1;
- char *psz_fileName = new char[nameLength];
- DragQueryFile( HDrop, i, psz_fileName, nameLength );
- // Add the file
- CmdAddItem cmd( getIntf(), psz_fileName, m_playOnDrop );
- cmd.execute();
- delete[] psz_fileName;
- }
- DragFinish( HDrop );
- }
- #endif