diff --git a/src/ofxEditorType.h b/src/ofxEditorType.h
new file mode 100644
index 0000000..cc0c1c8
--- /dev/null
+++ b/src/ofxEditorType.h
@@ -0,0 +1,12 @@
+#ifndef H_OFX_EDITOR_TYPE
+#define H_OFX_EDITOR_TYPE
+
+struct ofxEditorType
+{
+    enum {
+        TEXTURE,
+        PROJECTION
+    };
+};
+
+#endif
\ No newline at end of file
diff --git a/src/ofxGuiMode.h b/src/ofxGuiMode.h
new file mode 100644
index 0000000..a022b5c
--- /dev/null
+++ b/src/ofxGuiMode.h
@@ -0,0 +1,13 @@
+#ifndef H_OFX_GUI_MODE
+#define H_OFX_GUI_MODE
+
+struct ofxGuiMode
+{
+    enum {
+        NONE,
+        TEXTURE_MAPPING,
+        PROJECTION_MAPPING
+    };
+};
+
+#endif
\ No newline at end of file
diff --git a/src/ofxSurfaceManagerGui.cpp b/src/ofxSurfaceManagerGui.cpp
index b11b102..e9a39c8 100644
--- a/src/ofxSurfaceManagerGui.cpp
+++ b/src/ofxSurfaceManagerGui.cpp
@@ -3,6 +3,7 @@
 ofxSurfaceManagerGui::ofxSurfaceManagerGui()
 {
     surfaceManager = NULL;
+    guiMode = ofxGuiMode::NONE;
 }
 
 ofxSurfaceManagerGui::ofxSurfaceManagerGui(ofxSurfaceManager* newSurfaceManager)
diff --git a/src/ofxSurfaceManagerGui.h b/src/ofxSurfaceManagerGui.h
index 1ce3bd8..14cf333 100644
--- a/src/ofxSurfaceManagerGui.h
+++ b/src/ofxSurfaceManagerGui.h
@@ -5,6 +5,7 @@
 #include "ofxSurfaceManager.h"
 #include "ofxTextureEditor.h"
 #include "ofxProjectionEditor.h"
+#include "ofxGuiMode.h"
 
 class ofxSurfaceManagerGui
 {
@@ -19,6 +20,7 @@ private:
     ofxSurfaceManager* surfaceManager;
     ofxTextureEditor textureEditor;
     ofxProjectionEditor projectionEditor;
+    int guiMode;
 };
 
 #endif
\ No newline at end of file
diff --git a/src/ofxSurfaceType.h b/src/ofxSurfaceType.h
index 95c8e31..5914130 100644
--- a/src/ofxSurfaceType.h
+++ b/src/ofxSurfaceType.h
@@ -1,8 +1,11 @@
 #ifndef H_OFX_SURFACE_TYPE
 #define H_OFX_SURFACE_TYPE
 
-enum class SurfaceType {
-    TRIANGLE_SURFACE
+struct ofxSurfaceType
+{
+    enum {
+        TRIANGLE_SURFACE
+    };
 };
 
 #endif
\ No newline at end of file