added wxLogBuffer which collects all log messages in a string buffer

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@34556 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/log.cpp

@@ -522,6 +522,22 @@ void wxLog::Flush()
     return false;
 }
 
+// ----------------------------------------------------------------------------
+// wxLogBuffer implementation
+// ----------------------------------------------------------------------------
+
+void wxLogBuffer::Flush()
+{
+    wxMessageOutputBest out;
+    out.Printf(_T("%s"), m_str.c_str());
+    m_str.clear();
+}
+
+void wxLogBuffer::DoLogString(const wxChar *szString, time_t WXUNUSED(t))
+{
+    m_str << szString << _T("\n");
+}
+
 // ----------------------------------------------------------------------------
 // wxLogStderr class implementation
 // ----------------------------------------------------------------------------