subsys/system/explorer/utility/treedroptarget.h

   1 /**************************************************************************
   2    THIS CODE AND INFORMATION IS PROVIDED 'AS IS' WITHOUT WARRANTY OF
   3    ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
   4    THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
   5    PARTICULAR PURPOSE.
   6    Author: Leon Finker  01/2001
   7    Modifications: removed ATL dependencies, Martin Fuchs 7/2003
   8 **************************************************************************/
   9
  10 #include "dragdropimpl.h"
  11
  12 class TreeDropTarget : public IDropTargetImpl
  13 {
  14 public:
  15         TreeDropTarget(HWND hTargetWnd) : IDropTargetImpl(hTargetWnd) {}
  16
  17         virtual bool OnDrop(FORMATETC* pFmtEtc, STGMEDIUM& medium, DWORD *pdwEffect)
  18         {
  19                 if (pFmtEtc->cfFormat == CF_HDROP && medium.tymed == TYMED_HGLOBAL)
  20                 {
  21                         HDROP hDrop = (HDROP)GlobalLock(medium.hGlobal);
  22                         if (hDrop != NULL)
  23                         {
  24                                 TCHAR szFileName[MAX_PATH];
  25
  26                                 UINT cFiles = DragQueryFile(hDrop, 0xFFFFFFFF, NULL, 0);
  27
  28                                 for(UINT i = 0; i < cFiles; ++i)
  29                                 {
  30                                         DragQueryFile(hDrop, i, szFileName, sizeof(szFileName));
  31
  32                                         if (DROPEFFECT_COPY & *pdwEffect)
  33                                         {
  34                                                  // copy the file or dir
  35
  36                                                 //TODO: Add the code to handle Copy
  37
  38                                         }
  39                                         else if (DROPEFFECT_MOVE & *pdwEffect)
  40                                         {
  41                                                  // move the file or dir
  42
  43                                                 //TODO: Add the code to handle Move
  44
  45                                         }
  46                                 }
  47                                 //DragFinish(hDrop); // base class calls ReleaseStgMedium
  48                         }
  49                         GlobalUnlock(medium.hGlobal);
  50                 }
  51                 TreeView_SelectDropTarget(m_hTargetWnd, NULL);
  52                 return true; //let base free the medium
  53         }
  54
  55         virtual HRESULT STDMETHODCALLTYPE DragOver(
  56         /* [in] */ DWORD grfKeyState,
  57         /* [in] */ POINTL pt,
  58         /* [out][in] */ DWORD __RPC_FAR *pdwEffect)
  59         {
  60                 TVHITTESTINFO hit;
  61                 hit.pt = (POINT&)pt;
  62                 ScreenToClient(m_hTargetWnd,&hit.pt);
  63                 hit.flags = TVHT_ONITEM;
  64                 HTREEITEM hItem = TreeView_HitTest(m_hTargetWnd,&hit);
  65
  66                 if (hItem != NULL)
  67                 {
  68                         TreeView_SelectDropTarget(m_hTargetWnd, hItem);
  69                 }
  70
  71                 return IDropTargetImpl::DragOver(grfKeyState, pt, pdwEffect);
  72         }
  73
  74         virtual HRESULT STDMETHODCALLTYPE DragLeave(void)
  75         {
  76                 TreeView_SelectDropTarget(m_hTargetWnd, NULL);
  77                 return IDropTargetImpl::DragLeave();
  78         }
  79 };