#pragma once for our headers plus drive-by formatting

rtgui/previewmodepanel.h

@@ -15,14 +15,16 @@
  *  You should have received a copy of the GNU General Public License
  *  along with RawTherapee.  If not, see <https://www.gnu.org/licenses/>.
  */
-#ifndef _PREVIEWMODEPANEL_
-#define _PREVIEWMODEPANEL_
+#pragma once
 
 #include <gtkmm.h>
-#include "adjuster.h"//dev
+
+#include "adjuster.h"
 
 class ImageArea;
-class PreviewModePanel : public Gtk::HBox
+
+class PreviewModePanel :
+    public Gtk::HBox
 {
 
 protected:
@@ -83,5 +85,3 @@ public:
     int GetbackColor();
 
 };
-
-#endif