- Qt 5.15
- Getting Started Programming with Qt Quick
- Qt 5.15.12 Reference Documentation

# 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)
                     }
                 }
             }
         }
     }