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Qt World Summit Conference App

 import Felgo
 import QtQuick

 QtObject {
   id: _

   // url of locally stored event data in assets
   readonly property string fallbackScheduleUrl: Qt.resolvedUrl("../../assets/data/data.json")

   property bool loading: false

   Component.onCompleted: {
     HttpNetworkActivityIndicator.activationDelay = 0
   }

   signal eventDataLoaded(var eventData)

   // sendGetRequest - load data from url with success handler
   function sendGetRequest(url, successHandler, errorHandler) {
     // prepare and send request
     HttpRequest
     .get(url)
     .set("Accept", 'application/json')
     .then(function(res) {
       loading = false
       successHandler(JSON.parse(res.text))
     })
     .catch(function(err) {
       loading = false
       console.warn(JSON.stringify(err))
       console.error("Error: Failed to load data from "+url+", error = "+err.message)
       if(errorHandler !== undefined)
         errorHandler()
       else
         dataModel.loadingFailed()
     })
     loading = true
   }

   // loadData - loads event data from API
   function loadData() {
     _.sendGetRequest(_.fallbackScheduleUrl , function(eventData) {
       dataModel.eventData = eventData
       localStorage.setValue("eventData", dataModel.eventData)
       eventDataLoaded(eventData)
     }, function() {
       // error handler
       dataModel.loadingFailed()