subsys/system/explorer/Seashell/SeaShellExt/IEShellDragDrop.cpp

   1 //*******************************************************************************
   2 // COPYRIGHT NOTES
   3 // ---------------
   4 // You may use this source code, compile or redistribute it as part of your application
   5 // for free. You cannot redistribute it as a part of a software development
   6 // library without the agreement of the author. If the sources are
   7 // distributed along with the application, you should leave the original
   8 // copyright notes in the source code without any changes.
   9 // This code can be used WITHOUT ANY WARRANTIES at your own risk.
  10 //
  11 // For the latest updates to this code, check this site:
  12 // http://www.masmex.com
  13 // after Sept 2000
  14 //
  15 // Copyright(C) 2000 Philip Oldaker <email: philip@masmex.com>
  16 //*******************************************************************************
  17
  18 #include "stdafx.h"
  19 #include "IEShellDragDrop.h"
  20 #include "cbformats.h"
  21
  22 #ifndef OleStdGetDropEffect
  23 #define OleStdGetDropEffect(grfKeyState)    \
  24    ( (grfKeyState & MK_CONTROL) ?          \
  25       ( (grfKeyState & MK_SHIFT) ? DROPEFFECT_LINK : DROPEFFECT_COPY ) :  \
  26       ( (grfKeyState & MK_SHIFT) ? DROPEFFECT_MOVE : DROPEFFECT_NONE ) )
  27 #endif
  28
  29 bool CIEShellDragDrop::DragEnter(CDD_OleDropTargetInfo *pInfo,LPSHELLFOLDER psfFolder,LPITEMIDLIST pidl)
  30 {
  31 //      DWORD dwEffect = m_ShellPidl.GetDragDropAttributes(pInfo->GetDataObject()->m_lpDataObject);
  32         IDropTarget *pdt=NULL;
  33         if (psfFolder == NULL)
  34                 psfFolder = m_psfDesktop;
  35     HRESULT hr = psfFolder->GetUIObjectOf(pInfo->GetSafeHwnd(),1,(LPCITEMIDLIST*)&pidl, IID_IDropTarget, NULL, (LPVOID*)&pdt);
  36         if (FAILED(hr))
  37                 return false;
  38         DWORD dwKeyState = pInfo->GetKeyboardState();
  39         CPoint pt(pInfo->GetPoint());
  40         ::ClientToScreen(pInfo->GetSafeHwnd(),&pt);
  41         POINTL ptl;
  42         ptl.x = pt.x;
  43         ptl.y = pt.y;
  44         DWORD dwEffect=0;
  45     pdt->DragEnter(pInfo->GetDataObject()->m_lpDataObject, dwKeyState, ptl, &dwEffect);
  46         pdt->DragLeave();
  47         pInfo->SetDropEffect(dwEffect);
  48         pdt->Release();
  49         return true;
  50 }
  51
  52 bool CIEShellDragDrop::DragLeave(CDD_OleDropTargetInfo *pInfo)
  53 {
  54         return false;
  55 }
  56
  57 bool CIEShellDragDrop::DragOver(CDD_OleDropTargetInfo *pInfo,LPSHELLFOLDER psfFolder,LPITEMIDLIST pidl)
  58 {
  59         pInfo->SetDropEffect(DROPEFFECT_NONE);
  60
  61         IDropTarget *pdt=NULL;
  62         if (psfFolder == NULL)
  63                 psfFolder = m_psfDesktop;
  64     HRESULT hr = psfFolder->GetUIObjectOf(pInfo->GetSafeHwnd(),1,(LPCITEMIDLIST*)&pidl, IID_IDropTarget, NULL, (LPVOID*)&pdt);
  65         if (FAILED(hr))
  66                 return false;
  67
  68         DWORD dwKeyState = pInfo->GetKeyboardState();
  69         TRACE1("dwKeyState=%u\n",dwKeyState);
  70         CPoint pt(pInfo->GetPoint());
  71         ::ClientToScreen(pInfo->GetSafeHwnd(),&pt);
  72         POINTL ptl;
  73         ptl.x = pt.x;
  74         ptl.y = pt.y;
  75         DWORD dwEffect=OleStdGetDropEffect(dwKeyState);
  76         if (dwEffect == DROPEFFECT_NONE)
  77                 dwEffect = DROPEFFECT_MOVE | DROPEFFECT_COPY | DROPEFFECT_LINK;
  78         TRACE1("dropEffect=%u\n",dwEffect);
  79         pdt->DragEnter(pInfo->GetDataObject()->m_lpDataObject, dwKeyState, ptl, &dwEffect);
  80         pdt->DragOver(dwKeyState, ptl, &dwEffect);
  81         pdt->DragLeave();
  82         pdt->Release();
  83         pInfo->SetDropEffect(dwEffect);
  84         return true;
  85 }
  86
  87 bool CIEShellDragDrop::DragDrop(CDD_OleDropTargetInfo *pInfo,LPSHELLFOLDER psfFolder,LPITEMIDLIST pidl)
  88 {
  89         IDropTarget *pdt=NULL;
  90         if (psfFolder == NULL)
  91                 psfFolder = m_psfDesktop;
  92     HRESULT hr = psfFolder->GetUIObjectOf(pInfo->GetSafeHwnd(),1,(LPCITEMIDLIST*)&pidl, IID_IDropTarget, NULL, (LPVOID*)&pdt);
  93         if (FAILED(hr))
  94                 return false;
  95         CPoint pt(pInfo->GetPoint());
  96         TRACE2("Drop received at point(client) %d,%d\n",pt.x,pt.y);
  97         ::ClientToScreen(pInfo->GetSafeHwnd(),&pt);
  98         TRACE2("Drop received at point(screen) %d,%d\n",pt.x,pt.y);
  99         CWDClipboardData::Instance()->IsDataAvailable(pInfo->GetDataObject());
 100 #ifdef _DEBUG
 101         if (pInfo->GetDataObject()->IsDataAvailable(CF_TEXT))
 102         {
 103                 CCF_String cfString;
 104                 if (CWDClipboardData::Instance()->GetData(pInfo->GetDataObject(),&cfString,CWDClipboardData::e_cfString))
 105                 {
 106                         TRACE1("Received CF_TEXT %s\n",cfString.GetString());
 107                 }
 108         }
 109         if (pInfo->GetDataObject()->IsDataAvailable(CF_HDROP))
 110         {
 111                 CCF_HDROP cfHDROP;
 112                 if (CWDClipboardData::Instance()->GetData(pInfo->GetDataObject(),&cfHDROP,CWDClipboardData::e_cfHDROP))
 113                 {
 114                         for(UINT i=0;i < cfHDROP.GetCount();i++)
 115                                 TRACE2("Received CF_HDROP %s (%u)\n",cfHDROP.GetFileName(i),i);
 116                 }
 117         }
 118 #endif
 119         POINTL ptl;
 120         ptl.x = pt.x;
 121         ptl.y = pt.y;
 122         DWORD dwKeyState = pInfo->GetKeyboardState();
 123     DWORD dw = DROPEFFECT_MOVE;
 124     pdt->DragEnter(pInfo->GetDataObject()->m_lpDataObject, dwKeyState, ptl, &dw);
 125     pdt->DragOver(dwKeyState, ptl, &dw);
 126         DWORD dwEffect = m_ShellPidl.GetDragDropAttributes(pInfo->GetDataObject());
 127         TRACE2("Keyboardstate=%u DragDropEffect=%u\n",dwKeyState,dwEffect);
 128     pdt->Drop(pInfo->GetDataObject()->m_lpDataObject, dwKeyState, ptl, &dwEffect);
 129         pdt->Release();
 130         return true;
 131 }