code: function eventHover ( event ) {
  
              var proposal = calcPointToPercentage(event.calcPoint);
  
              var to = scope_Spectrum.getStep(proposal);
              var value = scope_Spectrum.fromStepping(to);
  
              Object.keys(scope_Events).forEach(function( targetEvent ) {
                  if ( 'hover' === targetEvent.split('.')[0] ) {
                      scope_Events[targetEvent].forEach(function( callback ) {
                          callback.call( scope_Self, value );
                      });
                  }
              });
          }
docs: Fires a 'hover' event for a hovered mouse/pen position.