Add `duplicateSurface()` method to `SurfaceManager`

src/Surfaces/SurfaceManager.cpp

@@ -42,6 +42,15 @@ void SurfaceManager::removeSurface(){
 	_surfaces.pop_back();
 }
 
+void SurfaceManager::deleteSurface(ofx::piMapper::BaseSurface * surface){
+	for(int i = 0; i < _surfaces.size(); ++i){
+		if(_surfaces[i] == surface){
+			_surfaces.erase(i);
+			break;
+		}
+	}
+}
+
 void SurfaceManager::clear(){
 	while(_surfaces.size()){
 		delete _surfaces.back();
@@ -157,6 +166,12 @@ BaseSurface * SurfaceManager::getSelectedSurface(){
 	return selectedSurface;
 }
 
+BaseSurface * SurfaceManager::duplicateSurface(BaseSurface * surface){
+	BaseSurface * duplicate = surface->clone();
+	addSurface(duplicate);
+	return duplicate;
+}
+
 // TODO: select vertex should be implemented ad BaseSurface level
 void SurfaceManager::selectNextVertex(){
 	if(selectedSurface == 0){

src/Surfaces/SurfaceManager.h

@@ -29,6 +29,7 @@ class SurfaceManager {
 		void addSurface(BaseSurface * surface);
 		void removeSelectedSurface();
 		void removeSurface();
+		void deleteSurface(BaseSurface * surface);
 		void deselectSurface();
 		void saveXmlSettings(string fileName);
 		void setMediaServer(MediaServer * newMediaServer);
@@ -42,6 +43,7 @@ class SurfaceManager {
 		BaseSurface * selectNextSurface();
 		BaseSurface * selectPrevSurface();
 		BaseSurface * getSelectedSurface();
+		BaseSurface * duplicateSurface(BaseSurface * surface);
 	
 		// These should trigger an event for the GUI layer to catch
 		void selectNextVertex();