👀 Views: 227 💬 Answers: 1 📅 Created: 2025-06-14

Qt QML ProgressBar Animation qml

I've been working on this all day and I need some guidance on I'm currently working on a custom QML ProgressBar that should animate smoothly between different values. However, I've run into an issue where the displayed value does not reflect the actual progress correctly when I use animations. I am trying to update the progress based on a timer, but it seems that the value is not being set properly during the animation phase. Here’s the relevant part of my code: ```qml import QtQuick 2.15 import QtQuick.Controls 2.15 Rectangle { width: 300 height: 50 property real progress: 0.0 ProgressBar { id: progressBar anchors.fill: parent value: progress onValueChanged: { console.log('Progress value changed to: ', value); } } Timer { interval: 1000 running: true repeat: true onTimeout: { if (progress < 100) { progress += 10; progressBar.implicitWidth = progressBar.width * (progress / 100); } } } } ``` When I run this, the ProgressBar visually does not reflect the actual progress value until the animation is complete. If I set the animation duration to 200ms (in the ProgressBar settings), it seems to lag behind and sometimes skips values, leading to unexpected jumps in the visual representation. I’ve tried using `Component.onCompleted` to initialize the progress value explicitly, but it hasn’t resolved the issue. Additionally, the console logs show that the value is changing, but the visual feedback feels sluggish and inaccurate. Could this be an issue with the way the QML engine handles property updates during animations, or is there something I am missing in terms of signal connections or property bindings? Any insights or suggestions would be greatly appreciated! My team is using Qml for this application. Thanks for taking the time to read this! Thanks, I really appreciate it!