Add wxImage::CanRead, wasn't in 1.59 ?

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4047 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/include/wx/image.h b/include/wx/image.h
index 0b7cc551b26ae61151b57ad4a5a501a7edfb984d..18ac41ad0f1361ba01157c555b082e4c8a1e02f2 100644 (file)
--- a/include/wx/image.h
+++ b/include/wx/image.h
@@ -290,10 +290,12 @@ public:
   unsigned char GetGreen( int x, int y );
   unsigned char GetBlue( int x, int y );
 
+  static bool CanRead( const wxString& name );
   virtual bool LoadFile( const wxString& name, long type = wxBITMAP_TYPE_ANY );
   virtual bool LoadFile( const wxString& name, const wxString& mimetype );
 
 #if wxUSE_STREAMS
+  static bool CanRead( wxInputStream& stream );
   virtual bool LoadFile( wxInputStream& stream, long type = wxBITMAP_TYPE_ANY );
   virtual bool LoadFile( wxInputStream& stream, const wxString& mimetype );
 #endif

diff --git a/src/common/image.cpp b/src/common/image.cpp
index 3679c78d0377ece78988b8a3e4a9be95072ca5b2..05344a678fc2f928c108393d1b2af8623b8988dd 100644 (file)
--- a/src/common/image.cpp
+++ b/src/common/image.cpp
@@ -437,8 +437,32 @@ bool wxImage::SaveFile( const wxString& filename, const wxString& mimetype )
         return FALSE;
 }
 
+bool wxImage::CanRead( const wxString &name )
+{
+#if wxUSE_STREAMS
+  wxFileInputStream stream(name);
+  return CanRead(stream);
+#else
+  return FALSE;
+#endif
+}
+
 #if wxUSE_STREAMS
 
+bool wxImage::CanRead( wxInputStream &stream )
+{
+  wxList &list=GetHandlers();
+  
+  for ( wxList::Node *node = list.GetFirst(); node; node = node->GetNext() )
+    {  
+      wxImageHandler *handler=(wxImageHandler*)node->GetData();
+      if (handler->CanRead( stream ))
+       return TRUE;
+    }
+
+  return FALSE;
+}
+
 bool wxImage::LoadFile( wxInputStream& stream, long type )
 {
     UnRef();