Hmm intersting. I'm getting a lot of compile errors. For instance
No member named 'load' in 'ofTrueTypeFont'
font_large->load(fontName,size,true, true, false, 0.0,resolution);
and
Use of undeclared identifier 'nullptr'
singleSelected = nullptr;
and
Use of undeclared identifier 'ofDrawCircle'
ofDrawCircle(position.x,position.y, radius);
Which specific examples work for you?