Recursive directory search in openframeworks

of_dir_search.cpp

const string allowed_ext[] = {"jpg", "png", "gif", "jpeg"}; //File types detected by the search
vector<ofFile> files;

void ofApp::scan_dir(ofDirectory dir){
    ofDirectory new_dir;
    int size = dir.listDir();
    for (int i = 0; i < size; i++){
        if (dir.getFile(i).isDirectory()){
            new_dir = ofDirectory(dir.getFile(i).getAbsolutePath());
            new_dir.listDir();
            new_dir.sort();
            scan_dir(new_dir);
        } else if (std::find(std::begin(allowed_ext),
                             std::end(allowed_ext),
                             dir.getFile(i).getExtension()) != std::end(allowed_ext)) {
            files.push_back(dir.getFile(i));
        }
    }
}