#pragma once for our headers plus drive-by formatting

rtgui/imageareapanel.h

@@ -16,13 +16,14 @@
  *  You should have received a copy of the GNU General Public License
  *  along with RawTherapee.  If not, see <https://www.gnu.org/licenses/>.
  */
-#ifndef _IMAGEAREAPANEL_
-#define _IMAGEAREAPANEL_
+#pragma once
 
 #include "imagearea.h"
 
 class ImageArea;
-class ImageAreaPanel : public Gtk::VBox
+
+class ImageAreaPanel :
+    public Gtk::VBox
 {
 
 protected:
@@ -42,5 +43,3 @@ public:
     void setBeforeAfterViews (ImageAreaPanel* bef, ImageAreaPanel* aft);
     void syncBeforeAfterViews();
 };
-
-#endif