@Override
  public void keyPressed(KeyEvent arg0) {
    if (!arg0.isActionKey()) {

      char c = arg0.getKeyChar();

      if (c == ' ' || c == '\n') {
        uncommitedText += c;
        System.out.println("you typed the word: \"" + uncommitedText + "\"");

        /*
         * Code for communicating with PDStore here
         * 1. Create PDWord instance?
         * 2. Commit to PDStore?
         */
        PDWord word = new PDWord(store);
        word.addText(uncommitedText);
        PDOperation op = new PDOperation(store);
        op.setCommand(editor.INSERT);
        Date date = new Date();
        op.setTimeStamp(date.getTime());
        op.setUser(TextEditor.userName);
        PDInsert insert = new PDInsert(store);
        insert.setWord(word);
        insert.setAfter(word);
        op.setSuperParameter(insert);

        history.addOperation(op);

        store.commit();

        // this.repaint();

        uncommitedText = "";
      } else if (c == '\u0008') { // backspace character
        int i = uncommitedText.length();
        uncommitedText = uncommitedText.substring(0, i - 1);
      } else {
        uncommitedText += c;
      }
    }
  }
  public void paint(Graphics g) {
    super.paint(g);
    List<PDOperation> operations = null;

    operations = new ArrayList<PDOperation>(history.getOperations());
    Collections.sort(operations, new OperationComparatorByTime());
    System.out.println(operations.size() + " operations retrieved");
    editor.wordList.clear();
    editor.wordList.add(new WordAndPos(editor.originator, 0));
    if (operations != null) {
      for (PDOperation o : operations) {
        // System.out.println(o.toString());
        PDInstance superParameter = o.getSuperParameter();
        String command = o.getCommand();
        if (command == editor.COPY) {
          PDCopy c = (PDCopy) superParameter;
          for (WordAndPos wp : editor.wordList) {
            if (wp.word.getId() == c.getToAfter().getId()) {
              editor.wordList.add(
                  new WordAndPos(c.getNewWord(), wp.caretPos + wp.word.getText().length()));
              textArea.setText(
                  textArea.getText().substring(0, wp.caretPos + wp.word.getText().length())
                      + c.getNewWord().getText()
                      + textArea.getText().substring(wp.word.getText().length()));
              break;
            }
          }

        } else if (command == editor.DELETE || command == editor.CUT) {
          PDDelete d = (PDDelete) superParameter;
          for (WordAndPos wp : editor.wordList) {
            if (wp.word.getId() == d.getWord().getId()) {
              editor.wordList.remove(wp);
              textArea.setText(
                  textArea.getText().substring(0, wp.caretPos)
                      + textArea.getText().substring(wp.caretPos + wp.word.getText().length()));
              break;
            }
          }
        } else if (command == editor.INSERT) {
          PDInsert i = (PDInsert) superParameter;
          for (WordAndPos wp : editor.wordList) {
            if (wp.word.getId() == i.getAfter().getId()) {
              editor.wordList.add(
                  new WordAndPos(i.getWord(), wp.caretPos + wp.word.getText().length()));
              textArea.setText(
                  textArea.getText().substring(0, wp.caretPos + wp.word.getText().length())
                      + i.getWord().getText()
                      + textArea.getText().substring(wp.word.getText().length()));
              break;
            }
          }
        } /*else if(command == MOVE){
          	PDMove m = (PDMove)superParameter;

          }*/
      }
      ArrayList<PDOperation> parseOperations = new ArrayList<PDOperation>();
      for (PDOperation operation : operations) {
        if (operation.toString() != null) {
          parseOperations.add(operation);
        }
      }
      list.setListData(parseOperations.toArray());
    }
  }