1. added wxEnhMetaFileXXX classes

2. fixed/added copy/paste for metafiles


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5375 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/enhmeta.h

@@ -0,0 +1,130 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/msw/enhmeta.h
+// Purpose:     wxEnhMetaFile class for Win32
+// Author:      Vadim Zeitlin
+// Modified by:
+// Created:     13.01.00
+// RCS-ID:      $Id$
+// Copyright:   (c) 2000 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
+// Licence:     wxWindows license
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_MSW_ENHMETA_H_
+#define _WX_MSW_ENHMETA_H_
+
+#ifdef __GNUG__
+    #pragma interface "enhmeta.h"
+#endif
+
+#include "wx/dc.h"
+
+#if wxUSE_DRAG_AND_DROP
+    #include "wx/dataobj.h"
+#endif
+
+// ----------------------------------------------------------------------------
+// wxEnhMetaFile: encapsulation of Win32 HENHMETAFILE
+// ----------------------------------------------------------------------------
+
+class WXDLLEXPORT wxEnhMetaFile : public wxObject
+{
+public:
+    wxEnhMetaFile(const wxString& file = wxEmptyString) : m_filename(file)
+        { Init(); }
+    wxEnhMetaFile(const wxEnhMetaFile& metafile)
+        { Init(); Assign(metafile); }
+    wxEnhMetaFile& operator=(const wxEnhMetaFile& metafile)
+        { Free(); Assign(metafile); return *this; }
+
+    virtual ~wxEnhMetaFile()
+        { Free(); }
+
+    // display the picture stored in the metafile on the given DC
+    bool Play(wxDC *dc, wxRect *rectBound = (wxRect *)NULL);
+
+    // accessors
+    bool Ok() const { return m_hMF != 0; }
+
+    wxSize GetSize() const;
+    int GetWidth() const { return GetSize().x; }
+    int GetHeight() const { return GetSize().y; }
+
+    const wxString& GetFileName() const { return m_filename; }
+
+    // implementation
+    WXHANDLE GetHENHMETAFILE() const { return m_hMF; }
+    void SetHENHMETAFILE(WXHANDLE hMF) { Free(); m_hMF = hMF; }
+
+protected:
+    void Init() { m_hMF = 0; }
+    void Free();
+    void Assign(const wxEnhMetaFile& mf);
+
+private:
+    wxString m_filename;
+    WXHANDLE m_hMF;
+
+    DECLARE_DYNAMIC_CLASS(wxEnhMetaFile)
+};
+
+// ----------------------------------------------------------------------------
+// wxEnhMetaFileDC: allows to create a wxEnhMetaFile
+// ----------------------------------------------------------------------------
+
+class WXDLLEXPORT wxEnhMetaFileDC : public wxDC
+{
+public:
+    // the ctor parameters specify the filename (empty for memory metafiles),
+    // the metafile picture size and the optional description/comment
+    wxEnhMetaFileDC(const wxString& filename = wxEmptyString,
+                    int width = 0, int height = 0,
+                    const wxString& description = wxEmptyString);
+
+    virtual ~wxEnhMetaFileDC();
+
+    // obtain a pointer to the new metafile (caller should delete it)
+    wxEnhMetaFile *Close();
+
+private:
+    DECLARE_DYNAMIC_CLASS(wxEnhMetaFileDC)
+};
+
+// ----------------------------------------------------------------------------
+// wxEnhMetaFileDataObject is a specialization of wxDataObject for enh metafile
+// ----------------------------------------------------------------------------
+
+#if wxUSE_DRAG_AND_DROP
+
+// notice that we want to support both CF_METAFILEPICT and CF_ENHMETAFILE and
+// so we derive from and not from wxDataObjectSimple
+class WXDLLEXPORT wxEnhMetaFileDataObject : public wxDataObject
+{
+public:
+    // ctors
+    wxEnhMetaFileDataObject() { }
+    wxEnhMetaFileDataObject(const wxEnhMetaFile& metafile)
+        : m_metafile(metafile) { }
+
+    // virtual functions which you may override if you want to provide data on
+    // demand only - otherwise, the trivial default versions will be used
+    virtual void SetMetafile(const wxEnhMetaFile& metafile)
+        { m_metafile = metafile; }
+    virtual wxEnhMetaFile GetMetafile() const
+        { return m_metafile; }
+
+    // implement base class pure virtuals
+    virtual wxDataFormat GetPreferredFormat(Direction dir) const;
+    virtual size_t GetFormatCount(Direction dir) const;
+    virtual void GetAllFormats(wxDataFormat *formats, Direction dir) const;
+    virtual size_t GetDataSize(const wxDataFormat& format) const;
+    virtual bool GetDataHere(const wxDataFormat& format, void *buf) const;
+    virtual bool SetData(const wxDataFormat& format, size_t len,
+                         const void *buf);
+
+protected:
+    wxEnhMetaFile m_metafile;
+};
+
+#endif // wxUSE_DRAG_AND_DROP
+
+#endif // _WX_MSW_ENHMETA_H_