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[wxWidgets.git] / include / wx / msw / ole / dataobj.h

diff --git a/include/wx/msw/ole/dataobj.h b/include/wx/msw/ole/dataobj.h
index 9ffe673ffe8dc2c0ea0da4eb3963e90745d92c7a..6490e67f82babe1fbcab7b4842988e9fb33a4fc7 100644 (file)
--- a/include/wx/msw/ole/dataobj.h
+++ b/include/wx/msw/ole/dataobj.h
@@ -12,6 +12,53 @@
 #ifndef   _WX_OLEDATAOBJ_H
 #define   _WX_OLEDATAOBJ_H
 
+// ----------------------------------------------------------------------------
+// wxDataFormat identifies the single format of data
+// ----------------------------------------------------------------------------
+
+class WXDLLEXPORT wxDataFormat
+{
+public:
+    // the clipboard formats under Win32 are UINTs
+    typedef unsigned int NativeFormat;
+
+    wxDataFormat(NativeFormat format = wxDF_INVALID) { m_format = format; }
+    wxDataFormat& operator=(NativeFormat format)
+        { m_format = format; return *this; }
+
+    // defautl copy ctor/assignment operators ok
+
+    // comparison (must have both versions)
+    bool operator==(wxDataFormatId format) const
+        { return m_format == (NativeFormat)format; }
+    bool operator!=(wxDataFormatId format) const
+        { return m_format != (NativeFormat)format; }
+    bool operator==(const wxDataFormat& format) const
+        { return m_format == format.m_format; }
+    bool operator!=(const wxDataFormat& format) const
+        { return m_format != format.m_format; }
+
+    // explicit and implicit conversions to NativeFormat which is one of
+    // standard data types (implicit conversion is useful for preserving the
+    // compatibility with old code)
+    NativeFormat GetFormatId() const { return m_format; }
+    operator NativeFormat() const { return m_format; }
+
+    // this only works with standard ids
+    void SetId(wxDataFormatId format) { m_format = format; }
+
+    // string ids are used for custom types - this SetId() must be used for
+    // application-specific formats
+    wxString GetId() const;
+    void SetId(const wxChar *format);
+
+private:
+    // returns TRUE if the format is one of those defined in wxDataFormatId
+    bool IsStandard() const { return m_format > 0 && m_format < wxDF_MAX; }
+
+    NativeFormat m_format;
+};
+
 // ----------------------------------------------------------------------------
 // forward declarations
 // ----------------------------------------------------------------------------
@@ -20,49 +67,26 @@ struct IDataObject;
 // ----------------------------------------------------------------------------
 // wxDataObject is a "smart" and polymorphic piece of data.
 //
-// @@@ it's currently "read-only" from COM point of view, i.e. we don't support
-//     SetData. We don't support all advise functions neither (but it's easy to
-//     do if we really want them)
+// TODO it's currently "read-only" from COM point of view, i.e. we don't support
+//      SetData. We don't support all advise functions neither (but it's easy to
+//      do if we really want them)
 // ----------------------------------------------------------------------------
 
 class WXDLLEXPORT wxDataObject
 {
 public:
-  // all data formats (values are the same as in windows.h, do not change!)
-  enum StdFormat
-  {
-    Invalid,
-    Text,
-    Bitmap,
-    MetafilePict,
-    Sylk,
-    Dif,
-    Tiff,
-    OemText,
-    Dib,
-    Palette,
-    Pendata,
-    Riff,
-    Wave,
-    UnicodeText,
-    EnhMetafile,
-    Hdrop,
-    Locale,
-    Max
-  };
-
   // function to return symbolic name of clipboard format (debug messages)
   static const char *GetFormatName(wxDataFormat format);
 
   // ctor & dtor
   wxDataObject();
-  ~wxDataObject();
+  virtual ~wxDataObject();
 
   // pure virtuals to override
     // get the best suited format for our data
   virtual wxDataFormat GetPreferredFormat() const = 0;
     // decide if we support this format (should be one of values of
-    // StdFormat enumerations or a user-defined format)
+    // wxDataFormatId enumerations or a user-defined format)
   virtual bool IsSupportedFormat(wxDataFormat format) const = 0;
     // get the (total) size of data
   virtual size_t GetDataSize() const = 0;
@@ -93,9 +117,9 @@ public:
 
   // implement base class pure virtuals
   virtual wxDataFormat GetPreferredFormat() const
-    { return (wxDataFormat) wxDataObject::Text; }
+    { return wxDF_TEXT; }
   virtual bool IsSupportedFormat(wxDataFormat format) const
-    { return format == wxDataObject::Text || format == wxDataObject::Locale; }
+    { return format == wxDF_TEXT || format == wxDF_LOCALE; }
   virtual size_t GetDataSize() const
     { return m_strText.Len() + 1; } // +1 for trailing '\0'of course
   virtual void GetDataHere(void *pBuf) const
@@ -131,17 +155,15 @@ public:
 
   virtual wxDataFormat GetFormat() const { return wxDF_BITMAP; }
 
-/* ??
   // implement base class pure virtuals
   virtual wxDataFormat GetPreferredFormat() const
-    { return (wxDataFormat) wxDataObject::Text; }
+    { return wxDF_BITMAP; }
   virtual bool IsSupportedFormat(wxDataFormat format) const
-    { return format == wxDataObject::Text || format == wxDataObject::Locale; }
+    { return format == wxDF_BITMAP; }
   virtual size_t GetDataSize() const
-    { return m_strText.Len() + 1; } // +1 for trailing '\0'of course
+    { wxASSERT(FALSE); return 0; } // BEMIMP
   virtual void GetDataHere(void *pBuf) const
-    { memcpy(pBuf, m_strText.c_str(), GetDataSize()); }
-*/
+    { wxASSERT(FALSE); } // BEMIMP
 
 private:
   wxBitmap  m_bitmap;