File Listing Order

Processing Coding Questions
6

some rearrangement

// https://discourse.processing.org/t/file-listing-order/7148
// @philspitler  @Architector_4

ArrayList<File> myfiles;
String path = "/home/pi/projects/processing/sketchbook";
boolean piconly = true;

void setup() {
  println("\nListing info about all files in a directory and all subdirectories \n _filter_ piconly: "+piconly);
  myfiles = listFilesRecursive(path,piconly);
  for (File afile : myfiles)  println("File: "+afile );                       // afile.getAbsolutePath());
}

void draw() {
}

// Function to get a list of all files in a directory and all subdirectories // with piconly filter
ArrayList<File> listFilesRecursive(String dir,boolean piconly) {
  ArrayList<File> fileList = new ArrayList<File>(); 
  recurseDir(fileList, dir, piconly);                       // ( file array , root_directory , pictures only )
  return fileList;
}

// Recursive function to traverse subdirectories
void recurseDir(ArrayList<File> a, String dir, boolean piconly) {
  boolean showdirs = false;
  File file = new File(dir);
  if (file.isDirectory()) {
    if ( showdirs ) a.add(file);                                          // only if you want to include directories in the list
    File[] subfiles = file.listFiles();
    java.util.Arrays.sort(subfiles);     //Sorts all files by name
    for (int i = 0; i < subfiles.length; i++)   recurseDir(a, subfiles[i].getAbsolutePath(), piconly ); // Call this function on all files in this directory
  } else {
    String fileName = file.getName();
    if ( piconly ) {
    if ( //fileName.endsWith(".other-random-formats")||
      fileName.endsWith(".gif")   ||
      fileName.endsWith(".jpg")   ||
      fileName.endsWith(".jpeg")  ||
      fileName.endsWith(".tga")   ||
      fileName.endsWith(".png")   ||
      fileName.endsWith(".svg") 
      )      a.add(file);          // if picture for piconly
    } else { a.add(file); }        // all
  }
}