include/wx/msw/ole/dropsrc.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/msw/ole/dropsrc.h
   3 // Purpose:     declaration of the wxDropSource class
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     06.03.98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef   _WX_OLEDROPSRC_H
  13 #define   _WX_OLEDROPSRC_H
  14
  15 #if wxUSE_DRAG_AND_DROP
  16
  17 // ----------------------------------------------------------------------------
  18 // forward declarations
  19 // ----------------------------------------------------------------------------
  20
  21 class wxIDropSource;
  22 class WXDLLIMPEXP_FWD_CORE wxDataObject;
  23 class WXDLLIMPEXP_FWD_CORE wxWindow;
  24
  25 // ----------------------------------------------------------------------------
  26 // macros
  27 // ----------------------------------------------------------------------------
  28
  29 // this macro may be used instead for wxDropSource ctor arguments: it will use
  30 // the cursor 'name' from the resources under MSW, but will expand to
  31 // something else under GTK. If you don't use it, you will have to use #ifdef
  32 // in the application code.
  33 #define wxDROP_ICON(name)   wxCursor(wxT(#name))
  34
  35 // ----------------------------------------------------------------------------
  36 // wxDropSource is used to start the drag-&-drop operation on associated
  37 // wxDataObject object. It's responsible for giving UI feedback while dragging.
  38 // ----------------------------------------------------------------------------
  39
  40 class WXDLLIMPEXP_CORE wxDropSource : public wxDropSourceBase
  41 {
  42 public:
  43     // ctors: if you use default ctor you must call SetData() later!
  44     //
  45     // NB: the "wxWindow *win" parameter is unused and is here only for wxGTK
  46     //     compatibility, as well as both icon parameters
  47     wxDropSource(wxWindow *win = NULL,
  48                  const wxCursor &cursorCopy = wxNullCursor,
  49                  const wxCursor &cursorMove = wxNullCursor,
  50                  const wxCursor &cursorStop = wxNullCursor);
  51     wxDropSource(wxDataObject& data,
  52                  wxWindow *win = NULL,
  53                  const wxCursor &cursorCopy = wxNullCursor,
  54                  const wxCursor &cursorMove = wxNullCursor,
  55                  const wxCursor &cursorStop = wxNullCursor);
  56
  57     virtual ~wxDropSource();
  58
  59     // do it (call this in response to a mouse button press, for example)
  60     // params: if bAllowMove is false, data can be only copied
  61     virtual wxDragResult DoDragDrop(int flags = wxDrag_CopyOnly);
  62
  63     // overridable: you may give some custom UI feedback during d&d operation
  64     // in this function (it's called on each mouse move, so it shouldn't be
  65     // too slow). Just return false if you want default feedback.
  66     virtual bool GiveFeedback(wxDragResult effect);
  67
  68 protected:
  69     void Init();
  70
  71 private:
  72     wxIDropSource *m_pIDropSource;  // the pointer to COM interface
  73
  74     wxDECLARE_NO_COPY_CLASS(wxDropSource);
  75 };
  76
  77 #endif  //wxUSE_DRAG_AND_DROP
  78
  79 #endif  //_WX_OLEDROPSRC_H