Added option (#define CAPTURE_STDERR)

if set then the DebugTrace calls only for failing tests are shown

JGE/include/DebugRoutines.h

@@ -4,6 +4,8 @@
 // dirty, but I get OS header includes this way
 #include "JGE.h"
 
+#include "OutputCapturer.h"
+
 #include <ostream>
 #include <iostream>
 #include <iomanip>
@@ -29,12 +31,23 @@ std::string ToHex(T* pointer)
 #if defined (WIN32) || defined (LINUX)
 
 #ifdef QT_CONFIG
+
+#ifdef CAPTURE_STDERR
 #define DebugTrace(inString)								\
 {															\
   std::ostringstream stream;								\
   stream << inString;					    \
-  qDebug("%s", stream.str().c_str());	                        \
+  OutputCapturer::add(stream.str()); \
 }
+#else // CAPTURE_STDERR
+#define DebugTrace(inString)								\
+{															\
+  std::ostringstream stream;								\
+  stream << inString;					    \
+  qDebug("%s", stream.str().c_str()); \
+}
+#endif // CAPTURE_STDERR
+
 #elif defined (ANDROID)
 #include <android/log.h>
 #define DebugTrace(inString)								\

JGE/include/OutputCapturer.h

@@ -0,0 +1,28 @@
+#ifndef OUTPUTCAPTURER_H
+#define OUTPUTCAPTURER_H
+
+#if defined(QT_CONFIG)
+#include <Qt>
+#include <string>
+#include <sstream>
+
+class OutputCapturer
+{
+private:
+    static std::ostringstream stream;
+public:
+    static void add(const std::string& s) {
+        stream << s << "\n";
+    }
+    static void debugAndClear() {
+        stream.flush();
+        qDebug("%s", stream.str().c_str());
+        stream.str("");
+    }
+    static void clear() {
+        stream.str("");
+    }
+};
+#endif
+
+#endif // OUTPUTCAPTURER_H