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Progress bar is not smooth

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qtquickqmlprogress bar
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  • D dan1973

    Try this in xml

    import QtQuick 2.15
    import QtQuick.Controls 2.15
    
    ApplicationWindow {
        id: root
        visible: true
        minimumWidth: 840
        minimumHeight: 600
    
        property real prgVal1:100
    
        function updateProgress(){
                if(prgVal1>0){
                    prgVal1 -= 0.1
                }
                else{
                    prgVal1 = 100
                }
                progressBar1.value = prgVal1
                console.log("prgVal1 = ", prgVal1);
        }
    
    
        Timer{
            id:timProgress
            interval: 10
            running: true
            repeat: true
            onTriggered: {
                updateProgress()
            }
        }
    
    
        ProgressBar{
            id: progressBar1
            visible: true
            width: 600
            height: 60
            x: 20
            y: 50
            value: 100
            from: 0
            to: 100
        }
    
    }
    
    
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    W Offline
    Witc
    wrote on last edited by
    #8

    @dan1973 said in Progress bar is not smooth:

    import QtQuick 2.15
    import QtQuick.Controls 2.15

    It Still "jumps"... In console the prgVal is correct: 100/99,9/99,8/99,7/99,6....

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    • D Offline
      D Offline
      dan1973
      wrote on last edited by
      #9

      @Witc said in Progress bar is not smooth:

      It Still "jumps"...

      what is the System configuration of yours: RAM, Processor and OS?

      W 1 Reply Last reply
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      • D Offline
        D Offline
        dan1973
        wrote on last edited by
        #10

        I checked it is moving smoothly without breaks or jagging

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        • D dan1973

          @Witc said in Progress bar is not smooth:

          It Still "jumps"...

          what is the System configuration of yours: RAM, Processor and OS?

          W Offline
          W Offline
          Witc
          wrote on last edited by
          #11

          @dan1973 said in Progress bar is not smooth:

          @Witc said in Progress bar is not smooth:

          It Still "jumps"...

          what is the System configuration of yours: RAM, Processor and OS?

          Now I tried the same app on my friends PC (Ubuntu)- and it works great.
          On my Windows 10, Dell, intel i7, 16GB RAM it is jagging

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          • D Offline
            D Offline
            dan1973
            wrote on last edited by
            #12

            @Witc said in Progress bar is not smooth:

            On my Windows 10, Dell, intel i7, 16GB RAM it is jagging

            your config above is Good Enough. Normally Qt requires min 4GB and 16GB will be enough to run any graphics. when you say intel i7 what's the processor speed.

            You should check if any background process keeps windows busy in providing priority to your app. normally windows OS guarantees for more than 20ms.

            if its over please mark solved. or any questions you can ask?

            W 1 Reply Last reply
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            • D dan1973

              @Witc said in Progress bar is not smooth:

              On my Windows 10, Dell, intel i7, 16GB RAM it is jagging

              your config above is Good Enough. Normally Qt requires min 4GB and 16GB will be enough to run any graphics. when you say intel i7 what's the processor speed.

              You should check if any background process keeps windows busy in providing priority to your app. normally windows OS guarantees for more than 20ms.

              if its over please mark solved. or any questions you can ask?

              W Offline
              W Offline
              Witc
              wrote on last edited by
              #13

              @dan1973 said in Progress bar is not smooth:

              if its over please mark solved. or any questions you can ask?

              unfortunatelly I have no idea how to solve it on my Computer, @ndias has the same problem as me, so ther is probably some bug in some verision of Qt? Python?....

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              • D Offline
                D Offline
                dan1973
                wrote on last edited by dan1973
                #14

                @Witc said in Progress bar is not smooth:

                probably some bug in some verision of Qt?

                which Qt version r u using? and which compiler?

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                • D dan1973

                  @Witc said in Progress bar is not smooth:

                  probably some bug in some verision of Qt?

                  which Qt version r u using? and which compiler?

                  W Offline
                  W Offline
                  Witc
                  wrote on last edited by
                  #15

                  @dan1973 said in Progress bar is not smooth:

                  @Witc said in Progress bar is not smooth:

                  probably some bug in some verision of Qt?

                  which Qt version r u using? and which compiler?

                  QT 6.3.1: 512b515f-437e-4470-8a0d-0a289634780e-image.png

                  jsulmJ 1 Reply Last reply
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                  • W Witc

                    @dan1973 said in Progress bar is not smooth:

                    @Witc said in Progress bar is not smooth:

                    probably some bug in some verision of Qt?

                    which Qt version r u using? and which compiler?

                    QT 6.3.1: 512b515f-437e-4470-8a0d-0a289634780e-image.png

                    jsulmJ Offline
                    jsulmJ Offline
                    jsulm
                    Lifetime Qt Champion
                    wrote on last edited by
                    #16

                    @Witc This does not answer the question which compiler you're using as you installed Qt for ARM64, MSVC2019, WebAssembly, Android and MinGW...

                    https://forum.qt.io/topic/113070/qt-code-of-conduct

                    W 1 Reply Last reply
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                    • jsulmJ jsulm

                      @Witc This does not answer the question which compiler you're using as you installed Qt for ARM64, MSVC2019, WebAssembly, Android and MinGW...

                      W Offline
                      W Offline
                      Witc
                      wrote on last edited by Witc
                      #17

                      @jsulm said in Progress bar is not smooth:

                      @Witc This does not answer the question which compiler you're using as you installed Qt for ARM64, MSVC2019, WebAssembly, Android and MinGW...

                      I am using Qt along with python 3.10 + Pyside6. No any line of my code is written in C/C++ ...

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                      • Marko StankeM Offline
                        Marko StankeM Offline
                        Marko Stanke
                        wrote on last edited by
                        #18

                        Tried it on Qt 5.15, and it works perfectly

                        1 Reply Last reply
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