allow passing wx[W]CharBuffer to wx vararg templates

[wxWidgets.git] / include / wx / msgout.h

diff --git a/include/wx/msgout.h b/include/wx/msgout.h
index f5bee59ac8d1051faf5dd480c69e92a8e29beecd..0445407d28dd9780d441be8369f4f5a3c7564dda 100755 (executable)
--- a/include/wx/msgout.h
+++ b/include/wx/msgout.h
@@ -5,7 +5,7 @@
 // Modified by:
 // Created:     17.07.02
 // RCS-ID:      $Id$
-// Copyright:   (c) wxWindows team
+// Copyright:   (c) Mattia Barbon
 // Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////
 
@@ -16,27 +16,46 @@
 // headers
 // ----------------------------------------------------------------------------
 
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-    #pragma interface "msgout.h"
-#endif
-
 #include "wx/defs.h"
-#include "wx/wxchar.h"
+#include "wx/chartype.h"
+#include "wx/strvararg.h"
 
 // ----------------------------------------------------------------------------
 // wxMessageOutput is a class abstracting formatted output target, i.e.
 // something you can printf() to
 // ----------------------------------------------------------------------------
 
-class WXDLLIMPEXP_BASE wxMessageOutput
+// NB: VC6 has a bug that causes linker errors if you have template methods
+//     in a class using __declspec(dllimport). The solution is to split such
+//     class into two classes, one that contains the template methods and does
+//     *not* use WXDLLIMPEXP_BASE and another class that contains the rest
+//     (with DLL linkage).
+class wxMessageOutputBase
 {
 public:
-    virtual ~wxMessageOutput() { }
+    virtual ~wxMessageOutputBase() { }
 
     // show a message to the user
-    virtual void Printf(const wxChar* format, ...)  ATTRIBUTE_PRINTF_2 = 0;
+    // void Printf(const wxChar* format, ...)  ATTRIBUTE_PRINTF_2 = 0;
+    WX_DEFINE_VARARG_FUNC_VOID(Printf, DoPrintf)
+
+protected:
+    virtual void DoPrintf(const wxChar* format, ...)  ATTRIBUTE_PRINTF_2 = 0;
+};
+
+#ifdef __VISUALC__
+    // "non dll-interface class 'wxStringPrintfMixin' used as base interface
+    // for dll-interface class 'wxString'" -- this is OK in our case
+    #pragma warning (disable:4275)
+#endif
+
+class WXDLLIMPEXP_BASE wxMessageOutput : public wxMessageOutputBase
+{
+public:
+    virtual ~wxMessageOutput() { }
 
-    // gets the current wxMessageOutput object
+    // gets the current wxMessageOutput object (may be NULL during
+    // initialization or shutdown)
     static wxMessageOutput* Get();
 
     // sets the global wxMessageOutput instance; returns the previous one
@@ -46,6 +65,25 @@ private:
     static wxMessageOutput* ms_msgOut;
 };
 
+#ifdef __VISUALC__
+    #pragma warning (default:4275)
+#endif
+
+// ----------------------------------------------------------------------------
+// implementation showing the message to the user in "best" possible way: uses
+// native message box if available (currently only under Windows) and stderr
+// otherwise; unlike wxMessageOutputMessageBox this class is always safe to use
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_BASE wxMessageOutputBest : public wxMessageOutput
+{
+public:
+    wxMessageOutputBest() { }
+
+protected:
+    virtual void DoPrintf(const wxChar* format, ...) ATTRIBUTE_PRINTF_2;
+};
+
 // ----------------------------------------------------------------------------
 // implementation which sends output to stderr
 // ----------------------------------------------------------------------------
@@ -55,7 +93,8 @@ class WXDLLIMPEXP_BASE wxMessageOutputStderr : public wxMessageOutput
 public:
     wxMessageOutputStderr() { }
 
-    virtual void Printf(const wxChar* format, ...) ATTRIBUTE_PRINTF_2;
+protected:
+    virtual void DoPrintf(const wxChar* format, ...) ATTRIBUTE_PRINTF_2;
 };
 
 // ----------------------------------------------------------------------------
@@ -69,7 +108,8 @@ class WXDLLIMPEXP_CORE wxMessageOutputMessageBox : public wxMessageOutput
 public:
     wxMessageOutputMessageBox() { }
 
-    virtual void Printf(const wxChar* format, ...) ATTRIBUTE_PRINTF_2;
+protected:
+    virtual void DoPrintf(const wxChar* format, ...) ATTRIBUTE_PRINTF_2;
 };
 
 #endif // wxUSE_GUI
@@ -83,7 +123,8 @@ class WXDLLIMPEXP_BASE wxMessageOutputDebug : public wxMessageOutput
 public:
     wxMessageOutputDebug() { }
 
-    virtual void Printf(const wxChar* format, ...) ATTRIBUTE_PRINTF_2;
+protected:
+    virtual void DoPrintf(const wxChar* format, ...) ATTRIBUTE_PRINTF_2;
 };
 
 // ----------------------------------------------------------------------------
@@ -95,7 +136,8 @@ class WXDLLIMPEXP_BASE wxMessageOutputLog : public wxMessageOutput
 public:
     wxMessageOutputLog() { }
 
-    virtual void Printf(const wxChar* format, ...) ATTRIBUTE_PRINTF_2;
+protected:
+    virtual void DoPrintf(const wxChar* format, ...) ATTRIBUTE_PRINTF_2;
 };
 
 #endif