///////////////////////////////////////////////////////////////////////////////
-// Name: ole/droptgt.h
+// Name: wx/msw/ole/droptgt.h
// Purpose: declaration of the wxDropTarget class
// Author: Vadim Zeitlin
-// Modified by:
+// Modified by:
// Created: 06.03.98
-// RCS-ID: $Id$
// Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
-// ============================================================================
-// prolog
-// ============================================================================
#ifndef _WX_OLEDROPTGT_H
#define _WX_OLEDROPTGT_H
-#ifdef __GNUG__
-#pragma interface "droptgt.h"
-#endif
-
-#if !USE_DRAG_AND_DROP
- #error "You should #define USE_DRAG_AND_DROP to 1 to compile this file!"
-#endif //WX_DRAG_DROP
+#if wxUSE_DRAG_AND_DROP
// ----------------------------------------------------------------------------
// forward declarations
// ----------------------------------------------------------------------------
+
class wxIDropTarget;
+struct wxIDropTargetHelper;
struct IDataObject;
// ----------------------------------------------------------------------------
// An instance of the class wxDropTarget may be associated with any wxWindow
// derived object via SetDropTarget() function. If this is done, the virtual
// methods of wxDropTarget are called when something is dropped on the window.
-//
+//
// Note that wxDropTarget is an abstract base class (ABC) and you should derive
// your own class from it implementing pure virtual function in order to use it
// (all of them, including protected ones which are called by the class itself)
// ----------------------------------------------------------------------------
-class WXDLLEXPORT wxDropTarget
+
+class WXDLLIMPEXP_CORE wxDropTarget : public wxDropTargetBase
{
public:
- // ctor & dtor
- wxDropTarget();
- virtual ~wxDropTarget();
-
- // normally called by wxWindow on window creation/destruction, but might be
- // called `manually' as well. Register() returns true on success.
- bool Register(WXHWND hwnd);
- void Revoke(WXHWND hwnd);
-
- // do we accept this kind of data?
- virtual bool IsAcceptedData(IDataObject *pIDataSource) const;
-
- // called when mouse enters/leaves the window: might be used to give
- // some visual feedback to the user
- virtual void OnEnter() { }
- virtual void OnLeave() { }
-
- // this function is called when data is dropped.
- // (x, y) are the coordinates of the drop
- virtual bool OnDrop(long x, long y, const void *pData) = 0;
-
-protected:
- // Override these to indicate what kind of data you support: the first
- // format to which data can be converted is used. The classes below show
- // how it can be done in the simplest cases.
- // how many different (clipboard) formats do you support?
- virtual size_t GetFormatCount() const = 0;
- // return the n-th supported format
- virtual wxDataFormat GetFormat(size_t n) const = 0;
+ // ctor & dtor
+ wxDropTarget(wxDataObject *dataObject = NULL);
+ virtual ~wxDropTarget();
+
+ // normally called by wxWindow on window creation/destruction, but might be
+ // called `manually' as well. Register() returns true on success.
+ bool Register(WXHWND hwnd);
+ void Revoke(WXHWND hwnd);
+
+ // provide default implementation for base class pure virtuals
+ virtual bool OnDrop(wxCoord x, wxCoord y);
+ virtual bool GetData();
+
+ // Can only be called during OnXXX methods.
+ wxDataFormat GetMatchingPair();
+
+ // implementation only from now on
+ // -------------------------------
+
+ // do we accept this kind of data?
+ bool MSWIsAcceptedData(IDataObject *pIDataSource) const;
+
+ // give us the data source from IDropTarget::Drop() - this is later used by
+ // GetData() when it's called from inside OnData()
+ void MSWSetDataSource(IDataObject *pIDataSource);
+
+ // These functions take care of all things necessary to support native drag
+ // images.
+ //
+ // {Init,End}DragImageSupport() are called during Register/Revoke,
+ // UpdateDragImageOnXXX() functions are called on the corresponding drop
+ // target events.
+ void MSWInitDragImageSupport();
+ void MSWEndDragImageSupport();
+ void MSWUpdateDragImageOnData(wxCoord x, wxCoord y, wxDragResult res);
+ void MSWUpdateDragImageOnDragOver(wxCoord x, wxCoord y, wxDragResult res);
+ void MSWUpdateDragImageOnEnter(wxCoord x, wxCoord y, wxDragResult res);
+ void MSWUpdateDragImageOnLeave();
private:
- wxIDropTarget *m_pIDropTarget; // the pointer to COM interface
-};
+ // helper used by IsAcceptedData() and GetData()
+ wxDataFormat MSWGetSupportedFormat(IDataObject *pIDataSource) const;
-// ----------------------------------------------------------------------------
-// A simple wxDropTarget derived class for text data: you only need to
-// override OnDropText() to get something working
-// ----------------------------------------------------------------------------
-class WXDLLEXPORT wxTextDropTarget : public wxDropTarget
-{
-public:
- virtual bool OnDrop(long x, long y, const void *pData);
- virtual bool OnDropText(long x, long y, const char *psz) = 0;
+ wxIDropTarget *m_pIDropTarget; // the pointer to our COM interface
+ IDataObject *m_pIDataSource; // the pointer to the source data object
+ wxIDropTargetHelper *m_dropTargetHelper; // the drop target helper
-protected:
- virtual size_t GetFormatCount() const;
- virtual wxDataFormat GetFormat(size_t n) const;
+ wxDECLARE_NO_COPY_CLASS(wxDropTarget);
};
-// ----------------------------------------------------------------------------
-// A drop target which accepts files (dragged from File Manager or Explorer)
-// ----------------------------------------------------------------------------
-class WXDLLEXPORT wxFileDropTarget : public wxDropTarget
-{
-public:
- virtual bool OnDrop(long x, long y, const void *pData);
-
- // params: the number of files and the array of file names
- virtual bool OnDropFiles(long x, long y,
- size_t nFiles, const char * const aszFiles[]) = 0;
-
-protected:
- virtual size_t GetFormatCount() const;
- virtual wxDataFormat GetFormat(size_t n) const;
-};
+#endif //wxUSE_DRAG_AND_DROP
-// ============================================================================
#endif //_WX_OLEDROPTGT_H
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