Getting Started Programming with Qt Quick

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  import QtQuick 2.11
  import QtQuick.Controls 2.4
  import QtQuick.Layouts 1.11
  import QtQuick.Window 2.11

  Dialog {
      id: alarmDialog
      title: "Add new alarm"
      modal: true
      standardButtons: DialogButtonBox.Ok | DialogButtonBox.Cancel

      property AlarmModel alarmModel

      function formatNumber(number) {
          return number < 10 && number >= 0 ? "0" + number : number.toString()
      }

      onAccepted: {
          alarmModel.append({
              "hour": hoursTumbler.currentIndex,
              "minute": minutesTumbler.currentIndex,
              "day": dayTumbler.currentIndex + 1,
              "month": monthTumbler.currentIndex + 1,
              "year": yearTumbler.years[yearTumbler.currentIndex],
              "activated": true,
              "label": "",
              "repeat": false,
              "daysToRepeat": [
                  { "dayOfWeek": 0, "repeat": false },
                  { "dayOfWeek": 1, "repeat": false },
                  { "dayOfWeek": 2, "repeat": false },
                  { "dayOfWeek": 3, "repeat": false },
                  { "dayOfWeek": 4, "repeat": false },
                  { "dayOfWeek": 5, "repeat": false },
                  { "dayOfWeek": 6, "repeat": false }
              ],
          })
      }
      onRejected: alarmDialog.close()

      contentItem: RowLayout {
          RowLayout {
              id: rowTumbler

              Tumbler {
                  id: hoursTumbler
                  model: 24
                  delegate: TumblerDelegate {
                      text: formatNumber(modelData)
                  }
              }
              Tumbler {
                  id: minutesTumbler
                  model: 60
                  delegate: TumblerDelegate {
                      text: formatNumber(modelData)
                  }
              }
          }

          RowLayout {
              id: datePicker

              Layout.leftMargin: 20

              property alias dayTumbler: dayTumbler
              property alias monthTumbler: monthTumbler
              property alias yearTumbler: yearTumbler

              readonly property var days: [31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]

              Tumbler {
                  id: dayTumbler

                  function updateModel() {
                      // Populate the model with days of the month. For example: [0, ..., 30]
                      var previousIndex = dayTumbler.currentIndex
                      var array = []
                      var newDays = datePicker.days[monthTumbler.currentIndex]
                      for (var i = 1; i <= newDays; ++i)
                          array.push(i)
                      dayTumbler.model = array
                      dayTumbler.currentIndex = Math.min(newDays - 1, previousIndex)
                  }

                  Component.onCompleted: updateModel()

                  delegate: TumblerDelegate {
                      text: formatNumber(modelData)
                  }
              }
              Tumbler {
                  id: monthTumbler

                  onCurrentIndexChanged: dayTumbler.updateModel()

                  model: 12
                  delegate: TumblerDelegate {
                      text: window.locale.standaloneMonthName(modelData, Locale.ShortFormat)
                  }
              }
              Tumbler {
                  id: yearTumbler

                  // This array is populated with the next three years. For example: [2018, 2019, 2020]
                  readonly property var years: (function() {
                      var currentYear = new Date().getFullYear()
                      return [0, 1, 2].map(function(value) { return value + currentYear; })
                  })()

                  model: years
                  delegate: TumblerDelegate {
                      text: formatNumber(modelData)
                  }
              }
          }
      }
  }