Add `getProjectionEditor` method to `SurfaceManagerGui`

src/Surfaces/SurfaceManagerGui.cpp

@@ -318,5 +318,9 @@ void SurfaceManagerGui::stopDrag(){
 	bDrag = false;
 }
 
+ProjectionEditor * SurfaceManagerGui::getProjectionEditor(){
+	return &projectionEditor;
+}
+
 } // namespace piMapper
 } // namespace ofx

src/Surfaces/SurfaceManagerGui.h

@@ -44,6 +44,8 @@ class SurfaceManagerGui {
 		void drawSelectedSurfaceTextureHighlight();
 		void startDrag();
 		void stopDrag();
+	
+		ProjectionEditor * getProjectionEditor();
 
 	private:
 		SurfaceManager * surfaceManager;