Add ofxPiMapper::moveSelection method

src/ofxPiMapper.cpp

@@ -60,6 +60,10 @@ void ofxPiMapper::togglePauseForSurface(unsigned int i){
 	}
 }
 
+void ofxPiMapper::moveSelection(ofVec2f by){
+	_application.getState()->moveSelection(&_application, by);
+}
+
 bool ofxPiMapper::loadXmlSettings(string fileName){
 	return _application.loadXmlSettings(fileName);
 }

src/ofxPiMapper.h

@@ -60,6 +60,7 @@ class ofxPiMapper {
 		void selectNextSurface();
 		void selectPrevSurface();
 		void togglePauseForSurface(unsigned int i);
+		void moveSelection(ofVec2f by);
 
 		bool loadXmlSettings(string fileName);