docs: def datetimeAt(self, x):
          """
          Returns the datetime at the inputed x position.
          
          :return     <QDateTime>
          """
          gantt = self.ganttWidget()
          dstart = gantt.dateTimeStart()
          distance = int(x / float(gantt.cellWidth()))
          
          # calculate the time for a minute
          if scale == gantt.Timescale.Minute:
              return dstart.addSecs(distance)
          
          # calculate the time for an hour
          elif scale == gantt.Timescale.Hour:
              return dstart.addSecs(distance * 2.0)
  
          # calculate the time for a day
          elif scale == gantt.Timescale.Day:
              dstart = QDateTime(gantt.dateStart(), QTime(0, 0, 0))
              return dstart.addSecs(distance * (60 * 2.0))
          
          # calculate the time off the date only
          else:
              date = self.dateAt(x)
              return QDateTime(date, QTime(0, 0, 0))