fix for potention crash when conversion fails

[wxWidgets.git] / src / msw / enhmeta.cpp

diff --git a/src/msw/enhmeta.cpp b/src/msw/enhmeta.cpp
index 621208202c3f19f1c3207e8adb9d543646e8d650..ce2ecc0ae846dc57f852c23bcdfbeb2171536c7a 100644 (file)
--- a/src/msw/enhmeta.cpp
+++ b/src/msw/enhmeta.cpp
@@ -1,5 +1,5 @@
 ///////////////////////////////////////////////////////////////////////////////
-// Name:        msw/enhmeta.cpp
+// Name:        src/msw/enhmeta.cpp
 // Purpose:     implementation of wxEnhMetaFileXXX classes
 // Author:      Vadim Zeitlin
 // Modified by:
@@ -17,10 +17,6 @@
 // headers
 // ----------------------------------------------------------------------------
 
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-    #pragma implementation "enhmeta.h"
-#endif
-
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
@@ -79,7 +75,7 @@ void wxEnhMetaFile::Init()
     }
     else // have valid file name, load metafile from it
     {
-        m_hMF = GetEnhMetaFile(m_filename);
+        m_hMF = (WXHANDLE)::GetEnhMetaFile(m_filename);
         if ( !m_hMF )
             wxLogSysError(_("Failed to load metafile from file \"%s\"."),
                           m_filename.c_str());
@@ -120,7 +116,7 @@ void wxEnhMetaFile::Free()
 bool wxEnhMetaFile::Play(wxDC *dc, wxRect *rectBound)
 {
     wxCHECK_MSG( Ok(), false, _T("can't play invalid enhanced metafile") );
-    wxCHECK_MSG( dc, FALSE, _T("invalid wxDC in wxEnhMetaFile::Play") );
+    wxCHECK_MSG( dc, false, _T("invalid wxDC in wxEnhMetaFile::Play") );
 
     RECT rect;
     if ( rectBound )
@@ -180,8 +176,8 @@ wxSize wxEnhMetaFile::GetSize() const
 
 bool wxEnhMetaFile::SetClipboard(int WXUNUSED(width), int WXUNUSED(height))
 {
-#if wxUSE_DRAG_AND_DROP
-    wxCHECK_MSG( m_hMF, FALSE, _T("can't copy invalid metafile to clipboard") );
+#if wxUSE_DRAG_AND_DROP && wxUSE_CLIPBOARD
+    wxCHECK_MSG( m_hMF, false, _T("can't copy invalid metafile to clipboard") );
 
     return wxTheClipboard->AddData(new wxEnhMetaFileDataObject(*this));
 #else // !wxUSE_DRAG_AND_DROP
@@ -198,7 +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 )
@@ -219,6 +217,7 @@ wxEnhMetaFileDC::wxEnhMetaFileDC(const wxString& filename,
         pRect = (LPRECT)NULL;
     }
 
+    ScreenHDC hdcRef;
     m_hDC = (WXHDC)::CreateEnhMetaFile(hdcRef, GetMetaFileName(filename),
                                        pRect, description);
     if ( !m_hDC )
@@ -227,6 +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") );
@@ -318,7 +325,7 @@ bool wxEnhMetaFileDataObject::GetDataHere(const wxDataFormat& format, void *buf)
 
         // first get the buffer size and alloc memory
         size_t size = ::GetWinMetaFileBits(hEMF, 0, NULL, MM_ANISOTROPIC, hdc);
-        wxCHECK_MSG( size, FALSE, _T("GetWinMetaFileBits() failed") );
+        wxCHECK_MSG( size, false, _T("GetWinMetaFileBits() failed") );
 
         BYTE *bits = (BYTE *)malloc(size);
 
@@ -366,7 +373,7 @@ bool wxEnhMetaFileDataObject::SetData(const wxDataFormat& format,
     {
         hEMF = *(HENHMETAFILE *)buf;
 
-        wxCHECK_MSG( hEMF, FALSE, _T("pasting invalid enh metafile") );
+        wxCHECK_MSG( hEMF, false, _T("pasting invalid enh metafile") );
     }
     else
     {
@@ -377,7 +384,7 @@ bool wxEnhMetaFileDataObject::SetData(const wxDataFormat& format,
 
         // first get the buffer size
         size_t size = ::GetMetaFileBitsEx(mfpict->hMF, 0, NULL);
-        wxCHECK_MSG( size, FALSE, _T("GetMetaFileBitsEx() failed") );
+        wxCHECK_MSG( size, false, _T("GetMetaFileBitsEx() failed") );
 
         // then get metafile bits
         BYTE *bits = (BYTE *)malloc(size);
@@ -441,7 +448,7 @@ bool wxEnhMetaFileSimpleDataObject::SetData(size_t WXUNUSED(len),
 {
     HENHMETAFILE hEMF = *(HENHMETAFILE *)buf;
 
-    wxCHECK_MSG( hEMF, FALSE, _T("pasting invalid enh metafile") );
+    wxCHECK_MSG( hEMF, false, _T("pasting invalid enh metafile") );
     m_metafile.SetHENHMETAFILE((WXHANDLE)hEMF);
 
     return true;