Add ofxPiMapper::setActivePreset and getNumPresets

src/Surfaces/SurfaceManager.cpp

@@ -427,5 +427,17 @@ void SurfaceManager::setNextPreset(){
 	// TODO: Create command for this.
 }
 
+void SurfaceManager::setActivePreset(unsigned int i){
+	if(_presets.size() <= 1){
+		throw runtime_error("ofxPiMapper: No presets to set.");
+	}
+	
+	if(i >= _presets.size()){
+		throw runtime_error("ofxPiMapper: Preset index out of bounds.");
+	}
+	
+	_activePresetIndex = i;
+}
+
 } // namespace piMapper
 } // namespace ofx

src/Surfaces/SurfaceManager.h

@@ -77,6 +77,7 @@ class SurfaceManager {
 		SurfaceStack * getPresetAt(unsigned int i);
 	
 		void setNextPreset();
+		void setActivePreset(unsigned int i);
 	
 	private:
 		BaseSurface * selectedSurface;

src/ofxPiMapper.cpp

@@ -22,6 +22,14 @@ void ofxPiMapper::registerFboSource(ofx::piMapper::FboSource * fboSource){
 	_application.addFboSource(fboSource);
 }
 
+void ofxPiMapper::setActivePreset(unsigned int i){
+	_application.getSurfaceManager()->setActivePreset(i);
+}
+
 bool ofxPiMapper::loadXmlSettings(string fileName){
 	return _application.loadXmlSettings(fileName);
 }
+
+unsigned int ofxPiMapper::getNumPresets(){
+	return _application.getSurfaceManager()->getNumPresets();
+}

src/ofxPiMapper.h

@@ -27,8 +27,12 @@ class ofxPiMapper {
 	
 		void registerFboSource(ofx::piMapper::FboSource & fboSource);
 		void registerFboSource(ofx::piMapper::FboSource * fboSource);
+		void setActivePreset(unsigned int i);
+
 		bool loadXmlSettings(string fileName);
 	
+		unsigned int getNumPresets();
+
 	private:
 		ofx::piMapper::Application _application;
 };