include/wx/msw/ole/dropsrc.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  16     #pragma interface
  17 #endif
  18
  19 #if !wxUSE_DRAG_AND_DROP
  20   #error  "You should #define wxUSE_DRAG_AND_DROP to 1 to compile this file!"
  21 #endif  //WX_DRAG_DROP
  22
  23 // ----------------------------------------------------------------------------
  24 // forward declarations
  25 // ----------------------------------------------------------------------------
  26
  27 class wxIDropSource;
  28 class WXDLLEXPORT wxDataObject;
  29 class WXDLLEXPORT wxWindow;
  30
  31 // ----------------------------------------------------------------------------
  32 // macros
  33 // ----------------------------------------------------------------------------
  34
  35 // this macro may be used instead for wxDropSource ctor arguments: it will use
  36 // the cursor 'name' from the resources under MSW, but will expand to
  37 // something else under GTK. If you don't use it, you will have to use #ifdef
  38 // in the application code.
  39 #define wxDROP_ICON(name)   wxCursor(_T(#name))
  40
  41 // ----------------------------------------------------------------------------
  42 // wxDropSource is used to start the drag-&-drop operation on associated
  43 // wxDataObject object. It's responsible for giving UI feedback while dragging.
  44 // ----------------------------------------------------------------------------
  45
  46 class WXDLLEXPORT wxDropSource : public wxDropSourceBase
  47 {
  48 public:
  49     // ctors: if you use default ctor you must call SetData() later!
  50     //
  51     // NB: the "wxWindow *win" parameter is unused and is here only for wxGTK
  52     //     compatibility, as well as both icon parameters
  53     wxDropSource(wxWindow *win = NULL,
  54                  const wxCursor &cursorCopy = wxNullCursor,
  55                  const wxCursor &cursorMove = wxNullCursor,
  56                  const wxCursor &cursorStop = wxNullCursor);
  57     wxDropSource(wxDataObject& data,
  58                  wxWindow *win = NULL,
  59                  const wxCursor &cursorCopy = wxNullCursor,
  60                  const wxCursor &cursorMove = wxNullCursor,
  61                  const wxCursor &cursorStop = wxNullCursor);
  62
  63     virtual ~wxDropSource();
  64
  65     // do it (call this in response to a mouse button press, for example)
  66     // params: if bAllowMove is false, data can be only copied
  67     virtual wxDragResult DoDragDrop(int flags = wxDrag_CopyOnly);
  68
  69     // overridable: you may give some custom UI feedback during d&d operation
  70     // in this function (it's called on each mouse move, so it shouldn't be
  71     // too slow). Just return false if you want default feedback.
  72     virtual bool GiveFeedback(wxDragResult effect);
  73
  74 protected:
  75     void Init();
  76
  77 private:
  78     wxIDropSource *m_pIDropSource;  // the pointer to COM interface
  79
  80     DECLARE_NO_COPY_CLASS(wxDropSource)
  81 };
  82
  83 #endif  //_WX_OLEDROPSRC_H