NSCollectionView / index of NSImageView

Question

Hello everybody,
I am going to try to describe simply my problem.
Context :
I manage a list of images (NSImage in correlation with a NSArrayController).
These images are drawn in a NSCollectionView (-> NSBox - > NSImageView).
OK.
The images are added in the NSCollectionView either by "Drag and Drop", or by adding items ( NSImage) in my list of images.
Theses images  are not "selectables"  (and it is a will of my part).
The problem :
When I put down by "Drag and Drop" an image ("on" a NSImageView of my NSCollectionView), I do not manage to get back the index of this NSImageView in the NSCollectionView !
The problem would be different if the items of the NSCollectionViex were "selectables" but it is not the case.
Is it possible or not to get back in this context the index of the NSImageView concerned during "Drag and Drop"?
Thank you in advance for your help.

Answer 1

Yes something like this.
This is how I solved it
  private static final String WORD_DELIM = " \t\n\r\f,.;:";
  private int getIndexOfWord(String str, String text) {
    StringTokenizer tokenizer     = new StringTokenizer(str, WORD_DELIM, true);
    String token;
    StringBuffer previousContents = new StringBuffer();
    while(tokenizer.hasMoreTokens()) {
      token = tokenizer.nextToken();
      if(startsWithWord(text, token)) {
        break;
      previousContents.append(token);
    if(previousContents.length() == 0) {
      return -1;
    } else {
      return previousContents.length();
  private boolean startsWithWord(String word, String token) {
    //The token must start with "word"
    if(!token.startsWith(word)) {
      return false;
    //Now rplace all delimiters by blanks
    int delimCount = WORD_DELIM.length();
    char c;
    for(int i = delimCount - 1; i >= 0; i--) {
      c     = WORD_DELIM.charAt(i);
      token = token.replace(c, ' ');
    //Finally get rid of the blanks.
    token = token.trim();
    if(token.equals(word)) {
      return true;
    return false;