use wxWindowIDRef to transparently implement auto-generated ids ref-counting (slightl...

[wxWidgets.git] / include / wx / msw / enhmeta.h

diff --git a/include/wx/msw/enhmeta.h b/include/wx/msw/enhmeta.h
index 88f7cfa8a9cedea476e904b95be4e67291cef571..2e894bbbb55e58dec16adb0ba0d94298d6d94317 100644 (file)
--- a/include/wx/msw/enhmeta.h
+++ b/include/wx/msw/enhmeta.h
@@ -6,17 +6,14 @@
 // Created:     13.01.00
 // RCS-ID:      $Id$
 // Copyright:   (c) 2000 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
-// Licence:     wxWindows license
+// Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////
 
 #ifndef _WX_MSW_ENHMETA_H_
 #define _WX_MSW_ENHMETA_H_
 
-#ifdef __GNUG__
-    #pragma interface "enhmeta.h"
-#endif
-
 #include "wx/dc.h"
+#include "wx/gdiobj.h"
 
 #if wxUSE_DRAG_AND_DROP
     #include "wx/dataobj.h"
@@ -26,12 +23,12 @@
 // wxEnhMetaFile: encapsulation of Win32 HENHMETAFILE
 // ----------------------------------------------------------------------------
 
-class WXDLLEXPORT wxEnhMetaFile : public wxObject
+class WXDLLEXPORT wxEnhMetaFile : public wxGDIObject
 {
 public:
     wxEnhMetaFile(const wxString& file = wxEmptyString) : m_filename(file)
         { Init(); }
-    wxEnhMetaFile(const wxEnhMetaFile& metafile)
+    wxEnhMetaFile(const wxEnhMetaFile& metafile) : wxGDIObject()
         { Init(); Assign(metafile); }
     wxEnhMetaFile& operator=(const wxEnhMetaFile& metafile)
         { Free(); Assign(metafile); return *this; }
@@ -43,7 +40,7 @@ public:
     bool Play(wxDC *dc, wxRect *rectBound = (wxRect *)NULL);
 
     // accessors
-    bool Ok() const { return m_hMF != 0; }
+    virtual bool IsOk() const { return m_hMF != 0; }
 
     wxSize GetSize() const;
     int GetWidth() const { return GetSize().x; }
@@ -61,10 +58,15 @@ public:
     void SetHENHMETAFILE(WXHANDLE hMF) { Free(); m_hMF = hMF; }
 
 protected:
-    void Init() { m_hMF = 0; }
+    void Init();
     void Free();
     void Assign(const wxEnhMetaFile& mf);
 
+    // we don't use these functions (but probably should) but have to implement
+    // them as they're pure virtual in the base class
+    virtual wxGDIRefData *CreateGDIRefData() const;
+    virtual wxGDIRefData *CloneGDIRefData(const wxGDIRefData *data) const;
+
 private:
     wxString m_filename;
     WXHANDLE m_hMF;
@@ -85,21 +87,15 @@ public:
                     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)
+    DECLARE_DYNAMIC_CLASS_NO_COPY(wxEnhMetaFileDC)
 };
 
+#if wxUSE_DRAG_AND_DROP
+
 // ----------------------------------------------------------------------------
 // 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 wxDataObject and not from wxDataObjectSimple
 class WXDLLEXPORT wxEnhMetaFileDataObject : public wxDataObject
@@ -128,6 +124,51 @@ public:
 
 protected:
     wxEnhMetaFile m_metafile;
+
+    DECLARE_NO_COPY_CLASS(wxEnhMetaFileDataObject)
+};
+
+
+// ----------------------------------------------------------------------------
+// wxEnhMetaFileSimpleDataObject does derive from wxDataObjectSimple which
+// makes it more convenient to use (it can be used with wxDataObjectComposite)
+// at the price of not supoprting any more CF_METAFILEPICT but only
+// CF_ENHMETAFILE
+// ----------------------------------------------------------------------------
+
+class WXDLLEXPORT wxEnhMetaFileSimpleDataObject : public wxDataObjectSimple
+{
+public:
+    // ctors
+    wxEnhMetaFileSimpleDataObject() : wxDataObjectSimple(wxDF_ENHMETAFILE) { }
+    wxEnhMetaFileSimpleDataObject(const wxEnhMetaFile& metafile)
+        : wxDataObjectSimple(wxDF_ENHMETAFILE), 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 SetEnhMetafile(const wxEnhMetaFile& metafile)
+        { m_metafile = metafile; }
+    virtual wxEnhMetaFile GetEnhMetafile() const
+        { return m_metafile; }
+
+    // implement base class pure virtuals
+    virtual size_t GetDataSize() const;
+    virtual bool GetDataHere(void *buf) const;
+    virtual bool SetData(size_t len, const void *buf);
+
+    virtual size_t GetDataSize(const wxDataFormat& WXUNUSED(format)) const
+        { return GetDataSize(); }
+    virtual bool GetDataHere(const wxDataFormat& WXUNUSED(format),
+                             void *buf) const
+        { return GetDataHere(buf); }
+    virtual bool SetData(const wxDataFormat& WXUNUSED(format),
+                         size_t len, const void *buf)
+        { return SetData(len, buf); }
+
+protected:
+    wxEnhMetaFile m_metafile;
+
+    DECLARE_NO_COPY_CLASS(wxEnhMetaFileSimpleDataObject)
 };
 
 #endif // wxUSE_DRAG_AND_DROP