Pipette and "On Preview Widgets" branch. See issue 227

The pipette part is already working quite nice but need to be finished. The widgets part needs more work...

rtengine/mytime.h

@@ -0,0 +1,72 @@
+/*
+ *  This file is part of RawTherapee.
+ *
+ *  Copyright (c) 2004-2010 Gabor Horvath <hgabor@rawtherapee.com>
+ *
+ *  RawTherapee is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ * 
+ *  RawTherapee is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with RawTherapee.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _MYTIME_
+#define _MYTIME_
+
+#ifdef WIN32
+#include <windows.h>
+#elif defined __APPLE__
+#include <sys/time.h>
+#else
+#include <ctime>
+#endif 
+
+class MyTime {
+
+	public:
+#ifndef WIN32
+        timespec t;
+#else
+        LONGLONG t;
+        LONGLONG baseFrequency;
+        MyTime(){
+    		LARGE_INTEGER ulf;
+    		QueryPerformanceFrequency(&ulf);
+    		baseFrequency = ulf.QuadPart;
+    		QueryPerformanceCounter(&ulf);
+    		t = ulf.QuadPart;
+        }
+#endif
+
+	void set () {
+#ifdef WIN32
+		LARGE_INTEGER ulf;
+		QueryPerformanceCounter(&ulf);
+		t = ulf.QuadPart;
+#elif defined __APPLE__
+   struct timeval tv;
+   gettimeofday(&tv, NULL);
+   t.tv_sec = tv.tv_sec;
+   t.tv_nsec = tv.tv_usec*1000;
+#else
+   clock_gettime (CLOCK_REALTIME, &t); 
+#endif 	
+}
+
+	int etime (MyTime a) {
+#ifndef WIN32
+		return (t.tv_sec-a.t.tv_sec)*1000000 + (t.tv_nsec-a.t.tv_nsec)/1000;
+#else
+		return (t - a.t)*1000/(baseFrequency/1000);
+#endif
+	}
+};
+
+
+#endif