base/shell/explorer/desktop/desktop.h

   1 /*
   2  * Copyright 2003, 2004 Martin Fuchs
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18
  19
  20  //
  21  // Explorer clone
  22  //
  23  // desktop.h
  24  //
  25  // Martin Fuchs, 09.08.2003
  26  //
  27
  28
  29 #define PM_SET_ICON_ALGORITHM   (WM_APP+0x19)
  30 #define PM_GET_ICON_ALGORITHM   (WM_APP+0x1A)
  31 #define PM_DISPLAY_VERSION              (WM_APP+0x24)
  32
  33
  34  /// subclassed background window behind the visible desktop window
  35 struct BackgroundWindow : public SubclassedWindow
  36 {
  37         typedef SubclassedWindow super;
  38
  39         BackgroundWindow(HWND hwnd);
  40
  41 protected:
  42         LRESULT WndProc(UINT nmsg, WPARAM wparam, LPARAM lparam);
  43
  44         void    DrawDesktopBkgnd(HDC hdc);
  45
  46         int             _display_version;
  47 };
  48
  49
  50  /// Implementation of the Explorer desktop window
  51 struct DesktopWindow : public PreTranslateWindow, public IShellBrowserImpl
  52 {
  53         typedef PreTranslateWindow super;
  54
  55         DesktopWindow(HWND hwnd);
  56         ~DesktopWindow();
  57
  58         static HWND Create();
  59
  60         virtual HRESULT STDMETHODCALLTYPE GetWindow(HWND* lphwnd)
  61         {
  62                 *lphwnd = _hwnd;
  63                 return S_OK;
  64         }
  65
  66         virtual HRESULT STDMETHODCALLTYPE QueryActiveShellView(IShellView** ppshv)
  67         {
  68                 _pShellView->AddRef();
  69                 *ppshv = _pShellView;
  70                 return S_OK;
  71         }
  72
  73         virtual HRESULT STDMETHODCALLTYPE GetControlWindow(UINT id, HWND* lphwnd)
  74         {
  75                 return E_NOTIMPL;
  76         }
  77
  78         virtual HRESULT STDMETHODCALLTYPE SendControlMsg(UINT id, UINT uMsg, WPARAM wParam, LPARAM lParam, LRESULT* pret)
  79         {
  80                 return E_NOTIMPL;
  81         }
  82
  83 protected:
  84         LRESULT Init(LPCREATESTRUCT pcs);
  85         LRESULT WndProc(UINT nmsg, WPARAM wparam, LPARAM lparam);
  86
  87         IShellView*     _pShellView;
  88         WindowHandle _desktopBar;
  89
  90         virtual HRESULT OnDefaultCommand(LPIDA pida);
  91 };
  92
  93
  94  /// OLE drop target for the desktop window
  95 class DesktopDropTarget : public IDropTargetImpl
  96 {
  97         typedef IDropTargetImpl super;
  98
  99 public:
 100         DesktopDropTarget(HWND hTargetWnd) : super(hTargetWnd) {}
 101
 102         virtual bool OnDrop(FORMATETC* pFmtEtc, STGMEDIUM& medium, DWORD *pdwEffect)
 103         {
 104                 if (pFmtEtc->cfFormat==CF_HDROP && medium.tymed==TYMED_HGLOBAL) {
 105                         HDROP hDrop = (HDROP)GlobalLock(medium.hGlobal);
 106
 107                         if (hDrop) {
 108                                 TCHAR szFileName[MAX_PATH];
 109
 110                                 UINT cFiles = DragQueryFile(hDrop, 0xFFFFFFFF, NULL, 0);
 111
 112                                 for(UINT i=0; i<cFiles; ++i) {
 113                                         DragQueryFile(hDrop, i, szFileName, sizeof(szFileName) / sizeof(szFileName[0]));
 114
 115                                         if (DROPEFFECT_COPY & *pdwEffect) {
 116                                                  // copy the file or dir
 117
 118                                                 ///@todo Add the code to handle Copy
 119
 120                                         } else if (DROPEFFECT_MOVE & *pdwEffect) {
 121                                                  // move the file or dir
 122
 123                                                 ///@todo Add the code to handle Move
 124
 125                                         }
 126                                 }
 127                                 //DragFinish(hDrop); // base class calls ReleaseStgMedium
 128                         }
 129
 130                         GlobalUnlock(medium.hGlobal);
 131                 }
 132
 133                 //@@TreeView_SelectDropTarget(m_hTargetWnd, NULL);
 134
 135                 return true; //let base free the medium
 136         }
 137
 138         virtual HRESULT STDMETHODCALLTYPE DragOver(
 139         /* [in] */ DWORD grfKeyState,
 140         /* [in] */ POINTL pt,
 141         /* [out][in] */ DWORD __RPC_FAR *pdwEffect)
 142         {
 143                 TVHITTESTINFO hit;
 144                 hit.pt.x = pt.x;
 145                 hit.pt.y = pt.y;
 146                 ScreenToClient(m_hTargetWnd, &hit.pt);
 147                 hit.flags = TVHT_ONITEM;
 148
 149                 /*@@
 150                 HTREEITEM hItem = TreeView_HitTest(m_hTargetWnd,&hit);
 151
 152                 if (hItem != NULL)
 153                         TreeView_SelectDropTarget(m_hTargetWnd, hItem);
 154                 */
 155
 156                 return super::DragOver(grfKeyState, pt, pdwEffect);
 157         }
 158
 159         virtual HRESULT STDMETHODCALLTYPE DragLeave(void)
 160         {
 161                 //@@ TreeView_SelectDropTarget(m_hTargetWnd, NULL);
 162
 163                 return super::DragLeave();
 164         }
 165 };
 166
 167
 168  /// subclassed ShellView window
 169 struct DesktopShellView : public ExtContextMenuHandlerT<SubclassedWindow>
 170 {
 171         typedef ExtContextMenuHandlerT<SubclassedWindow> super;
 172
 173         DesktopShellView(HWND hwnd, IShellView* pShellView);
 174         ~DesktopShellView();
 175
 176         bool    InitDragDrop();
 177
 178 protected:
 179         IShellView* _pShellView;
 180
 181         LRESULT WndProc(UINT nmsg, WPARAM wparam, LPARAM lparam);
 182         int             Command(int id, int code);
 183         int             Notify(int id, NMHDR* pnmh);
 184
 185         bool    DoContextMenu(int x, int y);
 186         HRESULT DoDesktopContextMenu(int x, int y);
 187         void    PositionIcons(int dir=1);
 188
 189         void    refresh();
 190
 191         HWND    _hwndListView;
 192         int             _icon_algo;
 193 };