progressBar value from for loop?

[filipdns]

Hello,

I have value change inside for loop and I want to use it to change my progressbar value in QML, How can I do that?

Thank you for your help!!

function tableupdate()
        {
            for( var i =listView.currentRow ; i > 0; i--)
            {

                JS.dbimmat(stringVariable4)
                var j = i-1
                var date_etape_readed1 = listView.model.get(j).date_etape
                var date_etape_readed2 = listView.model.get(i).date_etape
                var heure_depart_readed1 = listView.model.get(j).heure_depart
                var heure_depart_readed2 = listView.model.get(i).heure_depart
                var heure_arrivee_readed1 = listView.model.get(j).heure_arrivee
                var heure_arrivee_readed2 = listView.model.get(i).heure_arrivee
                var hour = parseFloat(listView.model.get(j).temps_bloc_etape)
                var cycle = parseInt(listView.model.get(j).cycle_etape)
                var sunsetofday
                var sunriseofday

                    sunsetofday = Qt.formatDateTime(new Date(date_etape_readed1).sunset(49.264063, 2.513419),"hh:mm")
                    sunriseofday= Qt.formatDateTime(new Date(date_etape_readed1).sunrise(49.264063, 2.513419),"hh:mm")
                    var nighttime = JS1.nighttime(heure_depart_readed1,heure_arrivee_readed1,sunsetofday, sunriseofday)
                    var temps_bloc_etape = JS1.substractionhours(heure_arrivee_readed1,heure_depart_readed1)
                    var temps_bloc_jour = JS1.hourtodec(JS1.substractionhours(temps_bloc_etape,JS1.decimalToHour(nighttime)))


                JS.dbtimeUpdateflightlog(
                            sunriseofday,
                            sunsetofday,
                            JS1.precisionRound(JS1.hourtodec(temps_bloc_etape),3),
                            JS1.precisionRound(temps_bloc_jour,3),
                            JS1.precisionRound(nighttime,3),
                            JS1.precisionRound(parseFloat(listView.model.get(i).heurecellule)+hour,3),
                            parseInt(listView.model.get(i).cyclecellule)+cycle,
                            JS1.precisionRound(parseFloat(listView.model.get(i).heure_SN_moteur_1)+hour,3),
                            parseInt(listView.model.get(i).cycle_SN_moteur_1)+cycle,
                            JS1.precisionRound(parseFloat(listView.model.get(i).heure_SN_moteur_2)+hour,3),
                            parseInt(listView.model.get(i).cycle_SN_moteur_2)+cycle,
                            listView.model.get(j).id
                            )
                listView.model.clear()
                JS.dbimmat(stringVariable4)
               progressbar.value=((listView.currentRow-i)/(listView.currentRow-1))
            }
        }

ProgressBar{
    id:progressbar
    value:0
}

[raven-worx]

@filipdns
like in C++ your operation blocks the painting thread and thus there is no update of the screen.
In QML you can use so called WorkerScripts to move a long running operation into the background. See this example.

[filipdns]

@raven-worx thanks a lot for your reply but it's not working...

using console.log to see the result, without workerScript, I got only the last result of the calculation, then only one line. The only difference with the WorkerScript that is I get all line but in one time and stay at the end of the loop...
here the qml file:

 WorkerScript {
                id: myWorker
                source: "timecalculation.js"
                onMessage: {console.log(messageObject.reply)}
        }




        function tableupdate()
        {
            for( var i =listView.currentRow ; i > 0; i--)
            {

                JS.dbimmat(stringVariable4)
                var j = i-1
                var date_etape_readed1 = listView.model.get(j).date_etape
                var date_etape_readed2 = listView.model.get(i).date_etape
                var heure_depart_readed1 = listView.model.get(j).heure_depart
                var heure_depart_readed2 = listView.model.get(i).heure_depart
                var heure_arrivee_readed1 = listView.model.get(j).heure_arrivee
                var heure_arrivee_readed2 = listView.model.get(i).heure_arrivee
                var hour = parseFloat(listView.model.get(j).temps_bloc_etape)
                var cycle = parseInt(listView.model.get(j).cycle_etape)
                var sunsetofday
                var sunriseofday

                    sunsetofday = Qt.formatDateTime(new Date(date_etape_readed1).sunset(49.264063, 2.513419),"hh:mm")
                    sunriseofday= Qt.formatDateTime(new Date(date_etape_readed1).sunrise(49.264063, 2.513419),"hh:mm")
                    var nighttime = JS1.nighttime(heure_depart_readed1,heure_arrivee_readed1,sunsetofday, sunriseofday)
                    var temps_bloc_etape = JS1.substractionhours(heure_arrivee_readed1,heure_depart_readed1)
                    var temps_bloc_jour = JS1.hourtodec(JS1.substractionhours(temps_bloc_etape,JS1.decimalToHour(nighttime)))

                JS.dbtimeUpdateflightlog(
                            sunriseofday,
                            sunsetofday,
                            JS1.precisionRound(JS1.hourtodec(temps_bloc_etape),3),
                            JS1.precisionRound(temps_bloc_jour,3),
                            JS1.precisionRound(nighttime,3),
                            JS1.precisionRound(parseFloat(listView.model.get(i).heurecellule)+hour,3),
                            parseInt(listView.model.get(i).cyclecellule)+cycle,
                            JS1.precisionRound(parseFloat(listView.model.get(i).heure_SN_moteur_1)+hour,3),
                            parseInt(listView.model.get(i).cycle_SN_moteur_1)+cycle,
                            JS1.precisionRound(parseFloat(listView.model.get(i).heure_SN_moteur_2)+hour,3),
                            parseInt(listView.model.get(i).cycle_SN_moteur_2)+cycle,
                            listView.model.get(j).id
                            )
                myWorker.sendMessage({'val':String((listView.currentRow-i)/(listView.currentRow-1))})
                    listView.model.clear()
                    JS.dbimmat(stringVariable4)
            }
        }

here the timecalculation.js:

WorkerScript.onMessage = function(message) {
    //Send result back to main thread
    WorkerScript.sendMessage( {'reply': message.val} );
}