Implement `SurfaceManager` `selectNextVertex` and `selectPrevVertex` methods

src/Surfaces/SurfaceManager.cpp

@@ -8,6 +8,7 @@ SurfaceManager::SurfaceManager(){
 	selectedSurface = 0;
 	ofAddListener(_surfaces.vertexChangedEvent, this, &SurfaceManager::onVertexChanged);
 	ofAddListener(_surfaces.verticesChangedEvent, this, &SurfaceManager::onVerticesChanged);
+	_selectedVertexIndex = 0;
 }
 
 void SurfaceManager::draw(){
@@ -151,12 +152,38 @@ BaseSurface * SurfaceManager::getSelectedSurface(){
 	return selectedSurface;
 }
 
-int SurfaceManager::selectNextVertex(){
-	//
+// TODO: select vertex should be implemented ad BaseSurface level
+void SurfaceManager::selectNextVertex(){
+	if(selectedSurface == 0){
+		return;
+	}
+	
+	int numVertices = selectedSurface->getVertices().size();
+	
+	if(_selectedVertexIndex < numVertices - 1){
+		_selectedVertexIndex += 1;
+	}else{
+		_selectedVertexIndex = 0;
+	}
+	
+	ofNotifyEvent(vertexSelectedEvent, _selectedVertexIndex, this);
 }
 
-int SurfaceManager::selectPrevVertex(){
-	//
+// TODO: select vertex should be implemented at BaseSurface level
+void SurfaceManager::selectPrevVertex(){
+	if(selectedSurface == 0){
+		return;
+	}
+	
+	int numVertices = selectedSurface->getVertices().size();
+	
+	if(_selectedVertexIndex > 0){
+		_selectedVertexIndex -= 1;
+	}else{
+		_selectedVertexIndex = numVertices - 1;
+	}
+	
+	ofNotifyEvent(vertexSelectedEvent, _selectedVertexIndex, this);
 }
 
 void SurfaceManager::deselectSurface(){

src/Surfaces/SurfaceManager.h

@@ -44,14 +44,15 @@ class SurfaceManager {
 		BaseSurface * getSelectedSurface();
 	
 		// These should trigger an event for the GUI layer to catch
-		int selectNextVertex();
-		int selectPrevVertex();
+		void selectNextVertex();
+		void selectPrevVertex();
 	
 		int size();
 	
 		ofEvent <ofVec3f> vertexChangedEvent;
 		ofEvent <vector<ofVec3f>> verticesChangedEvent;
 		ofEvent <int> surfaceSelectedEvent;
+		ofEvent <int> vertexSelectedEvent;
 
 		void onVertexChanged(ofVec3f & vertex);
 		void onVerticesChanged(vector<ofVec3f> & vertices);
@@ -61,6 +62,8 @@ class SurfaceManager {
 		ofxXmlSettings xmlSettings;
 		MediaServer * mediaServer;
 		SurfaceStack _surfaces;
+	
+		int _selectedVertexIndex;
 };
 
 } // namespace piMapper