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Qt World Summit Conference App

 import Felgo 3.0
 import QtQuick 2.0
 import "."

 Item {
   id: ratingRow

   property int stars: 0
   property bool past: false
   property bool isRated: false
   property var talk

   height: col.height

   Component.onCompleted: {
     checkTimer.start()
     // the model will return -1 if nothing is stored, or 1-5 if a stored rating is successfully loaded
     var rating = dataModel.getRating(talk.id)
     isRated = rating > -1
     stars = rating
   }

   Column {
     id: col
     width: parent.width
     Item {
       width: parent.width
       height: dp(40)

       Row {
         anchors.centerIn: parent

         Repeater {
           model: 5

           Item {
             width: dp(50)
             height: dp(40)

             Image {
               source: stars > index ? "../../assets/Qt_logo.png" : "../../assets/Qt_logo_iOS_off.png"
               opacity: past ? stars > index ? 1 : 0.2 : 0
               width: parent.width - dp(20)
               fillMode: Image.PreserveAspectFit
               anchors.centerIn: parent
             }

             // the stars can only be clicked if the talk has ended and it is not yet rated
             MouseArea {
               anchors.fill: parent
               enabled: past && !isRated
               onClicked: starClicked(index+1)
             }
           }
         }
       }

       AppText {
         anchors.centerIn: parent
         visible: !past
         text: "Rating opens after talk ends at " + talk.end
         wrapMode: Text.WordWrap
         font.pixelSize: sp(14)
         width: parent.width
         horizontalAlignment: AppText.AlignHCenter
         font.italic: true
       }
     }

     Item {
       id: okButtonWrapper
       visible: false
       width: parent.width
       clip: true
       Behavior on height {NumberAnimation{duration: 250}}

       Item {
         width: parent.width
         height: dp(40)
         y: dp(20)

         AppButton {
           anchors.centerIn: parent
           flat: false
           enabled: past && !isRated
           text: "Rate"
           onClicked: {
             saveRating()
           }
         }
       }
     }
   }

   // just checking every 10 seconds if the talk end time is reached is surely enough
   Timer {
     id: checkTimer
     interval: 10000
     repeat: true
     triggeredOnStart: true
     onTriggered: checkIfPast()
   }

   function starClicked(rating) {
     stars = rating
     // if this was the first time the stars are clicked, we can show the rate button
     if(!okButtonWrapper.visible) {
       okButtonWrapper.visible = true
       okButtonWrapper.height = dp(60)
     }
   }

   function saveRating() {
     okButtonWrapper.height = 0
     isRated = true
     amplitude.logEvent("Rate Talk", {"title" : talk.title, "talkId" : talk.id, "rating" : stars})
     logic.storeRating(talk.id, stars)
     if(gameNetwork.userScoresInitiallySynced)
       gameNetwork.reportRelativeScore(1)
     else
       gameNetwork.addScoreWhenSynced += 1
   }

   function checkIfPast() {
     var nowTime = new Date().getTime()
     var utcDateStr = talk.day+"T"+talk.end+".000"+dataModel.timeZone
     var talkEndTime = new Date(utcDateStr).getTime() - (15 * 60 * 1000)

     if(nowTime > talkEndTime) {
       checkTimer.stop()
       past = true