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...

rtgui/indclippedpanel.h

@@ -0,0 +1,42 @@
+/*
+ *  This file is part of RawTherapee.
+ *
+ *
+ *  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 _INDCLIPPEDPANEL_
+#define _INDCLIPPEDPANEL_
+
+#include <gtkmm.h>
+
+class ImageArea;
+class IndicateClippedPanel : public Gtk::HBox {
+
+	protected:
+        Gtk::ToggleButton* indclippedh;
+        Gtk::ToggleButton* indclippeds;
+		ImageArea* imageArea;
+		
+	public:
+		IndicateClippedPanel (ImageArea* ia);
+
+		void buttonToggled   ();
+		
+        void toggleClipped (bool highlights);  // inverts a toggle programmatically
+
+		bool showClippedShadows    () { return indclippeds->get_active (); }
+		bool showClippedHighlights () { return indclippedh->get_active (); }
+};
+
+#endif