From 0f1ded7ba30b1c439b1ae9240bbd82a3a47d32ad Mon Sep 17 00:00:00 2001
From: Krisjanis Rijnieks <krisjanis.rijnieks@gmail.com>
Date: Wed, 3 Feb 2016 21:39:50 +0100
Subject: [PATCH] Add `selectNextSurface` and `selectPrevSurface` methods to
 `SurfaceManager`

---
 src/Surfaces/SurfaceManager.cpp | 54 +++++++++++++++++++++++++++++++++
 src/Surfaces/SurfaceManager.h   |  4 ++-
 2 files changed, 57 insertions(+), 1 deletion(-)

diff --git a/src/Surfaces/SurfaceManager.cpp b/src/Surfaces/SurfaceManager.cpp
index c2463fd..4b86ec4 100644
--- a/src/Surfaces/SurfaceManager.cpp
+++ b/src/Surfaces/SurfaceManager.cpp
@@ -93,6 +93,60 @@ BaseSurface * SurfaceManager::selectSurface(BaseSurface * surface){
 	return 0;
 }
 
+BaseSurface * SurfaceManager::selectNextSurface(){
+	int next;
+	
+	if(selectedSurface == 0){
+		next = 0;
+		selectedSurface = selectSurface(next);
+		ofNotifyEvent(surfaceSelectedEvent, next, this);
+		return selectedSurface;
+	}
+	
+	for(int i = 0; i < _surfaces.size(); ++i){
+		if(_surfaces[i] == selectedSurface){
+			if(i < _surfaces.size() - 1){
+				next = i + 1;
+			}else{
+				next = 0;
+			}
+			
+			selectedSurface = _surfaces[next];
+			ofNotifyEvent(surfaceSelectedEvent, next, this);
+			return selectedSurface;
+		}
+	}
+	
+	return 0;
+}
+
+BaseSurface * SurfaceManager::selectPrevSurface(){
+	int prev;
+	
+	if(selectedSurface == 0){
+		prev = _surfaces.size() - 1;
+		selectedSurface = selectSurface(prev);
+		ofNotifyEvent(surfaceSelectedEvent, prev, this);
+		return selectedSurface;
+	}
+	
+	for(int i = 0; i < _surfaces.size(); ++i){
+		if(_surfaces[i] == selectedSurface){
+			if(i > 0){
+				prev = i - 1;
+			}else{
+				prev = _surfaces.size() - 1;
+			}
+			
+			selectedSurface = _surfaces[prev];
+			ofNotifyEvent(surfaceSelectedEvent, prev, this);
+			return selectedSurface;
+		}
+	}
+	
+	return 0;
+}
+
 BaseSurface * SurfaceManager::getSelectedSurface(){
 	return selectedSurface;
 }
diff --git a/src/Surfaces/SurfaceManager.h b/src/Surfaces/SurfaceManager.h
index 76c4c31..c8f2932 100644
--- a/src/Surfaces/SurfaceManager.h
+++ b/src/Surfaces/SurfaceManager.h
@@ -39,6 +39,8 @@ class SurfaceManager {
 		BaseSurface * getSurface(int index);
 		BaseSurface * selectSurface(int index);
 		BaseSurface * selectSurface(BaseSurface * surface);
+		BaseSurface * selectNextSurface();
+		BaseSurface * selectPrevSurface();
 		BaseSurface * getSelectedSurface();
 	
 		int size();
@@ -46,7 +48,7 @@ class SurfaceManager {
 		ofEvent <ofVec3f> vertexChangedEvent;
 		ofEvent <vector<ofVec3f>> verticesChangedEvent;
 		ofEvent <int> surfaceSelectedEvent;
-	
+
 		void onVertexChanged(ofVec3f & vertex);
 		void onVerticesChanged(vector<ofVec3f> & vertices);