gistfile1.txt

  /**
    Call by your subclass anytime you want the view to pick up the current 
    value from the form and post it out. 
  
    @param partialChange (optional) YES if this is a partial change.
    @returns result of validation.
  */
  fieldValueDidChange: function(partialChange) {

    // get the field value and set it.
    // if ret is an error, use that instead of the field value.
    var ret = this.performValidate(partialChange) ;
    if (ret == SC.Validator.NO_CHANGE) return ret ;

    // if the validator says everything is OK, then in addition to posting
    // out the value, go ahead and pass the value back through itself.
    // This way if you have a formatter applied, it will reformat.
    //
    // Do this BEFORE we set the value so that the valueObserver will not
    // overreact.
    //
    var value = ($ok(ret)) ? this._getFieldValue() : ret ;
    if (!partialChange && $ok(ret)) this._setFieldValue(value) ;
    if (value != this.get('value')) this.set('value',value) ;
    return ret ;
  },

gistfile2.txt

  // when we lose first responder, blur the text field if needed and show
  // the hint text if needed.
  /** @private */
  willLoseFirstResponder: function() {
    
    if (this._isFocused) {
      this._isFocused = false ;
      this._updateFieldHint() ;
      return this.rootElement.blur() ;
    } else {
      this._value = this.rootElement.value ;
      this.fieldValueDidChange() ;
      this._updateFieldHint() ;
      return true;
    }
  },