implemented wxDC::DoGetSize() correctly for metafile DC classes

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@36566 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/enhmeta.h

@@ -87,6 +87,12 @@ public:
     wxEnhMetaFile *Close();
 
 private:
+    virtual void DoGetSize(int *width, int *height) const;
+
+    // size passed to ctor and returned by DoGetSize()
+    int m_width,
+        m_height;
+
     DECLARE_DYNAMIC_CLASS_NO_COPY(wxEnhMetaFileDC)
 };
 

include/wx/msw/metafile.h

@@ -107,6 +107,8 @@ public:
     void SetWindowsMappingMode(int mm) { m_windowsMappingMode = mm; }
 
 protected:
+    virtual void DoGetSize(int *width, int *height) const;
+
     int           m_windowsMappingMode;
     wxMetafile*   m_metaFile;
 

src/msw/enhmeta.cpp

@@ -194,7 +194,9 @@ wxEnhMetaFileDC::wxEnhMetaFileDC(const wxString& filename,
                                  int width, int height,
                                  const wxString& description)
 {
-    ScreenHDC hdcRef;
+    m_width = width;
+    m_height = height;
+
     RECT rect;
     RECT *pRect;
     if ( width && height )
@@ -215,6 +217,7 @@ wxEnhMetaFileDC::wxEnhMetaFileDC(const wxString& filename,
         pRect = (LPRECT)NULL;
     }
 
+    ScreenHDC hdcRef;
     m_hDC = (WXHDC)::CreateEnhMetaFile(hdcRef, GetMetaFileName(filename),
                                        pRect, description);
     if ( !m_hDC )
@@ -223,6 +226,14 @@ wxEnhMetaFileDC::wxEnhMetaFileDC(const wxString& filename,
     }
 }
 
+void wxEnhMetaFileDC::DoGetSize(int *width, int *height) const
+{
+    if ( width )
+        *width = m_width;
+    if ( height )
+        *height = m_height;
+}
+
 wxEnhMetaFile *wxEnhMetaFileDC::Close()
 {
     wxCHECK_MSG( Ok(), NULL, _T("invalid wxEnhMetaFileDC") );

src/msw/metafile.cpp

@@ -243,6 +243,16 @@ void wxMetafileDC::GetTextExtent(const wxString& string, long *x, long *y,
         *externalLeading = tm.tmExternalLeading;
 }
 
+void wxMetafileDC::DoGetSize(int *width, int *height) const
+{
+    wxCHECK_RET( m_refData, _T("invalid wxMetafileDC") );
+
+    if ( width )
+        *width = M_METAFILEDATA->m_width;
+    if ( height )
+        *height = M_METAFILEDATA->m_height;
+}
+
 wxMetafile *wxMetafileDC::Close()
 {
     SelectOldObjects(m_hDC);