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QML Component implementation guide after model changes in Qt 6.5 - need guide with dynamic data binding

👀 Views: 49 đŸ’Ŧ Answers: 1 📅 Created: 2025-06-13
qt qml listview

Hey everyone, I'm running into an issue that's driving me crazy. Hey everyone, I'm running into an issue that's driving me crazy. I'm experiencing an scenario where a QML component does not visually update when the underlying model data changes. I am using Qt 6.5, and my setup involves a ListView that is bound to a ListModel. When I add new items to the model, the ListView does not refresh to display the new items, and the current items sometimes appear stale or unresponsive. Here's a simplified version of my QML code: ```qml import QtQuick 2.15 import QtQuick.Controls 2.15 ApplicationWindow { visible: true width: 640 height: 480 ListModel { id: myModel ListElement { name: "Item 1" } ListElement { name: "Item 2" } } ListView { width: parent.width height: parent.height model: myModel delegate: Item { width: parent.width height: 40 Text { text: model.name } } } Button { text: "Add Item" onClicked: { myModel.append({ name: "Item " + (myModel.count + 1) }); } } } ``` I've attempted a few things to solve the scenario: - Ensured the model is being modified properly using the `append` method. - Confirmed that there aren't any visibility issues with the ListView. - Added `onCountChanged` signals to debug the changes in the model count, but they seem to be firing as expected. Despite all this, the ListView doesn't reflect the changes made to the model. I also tried using `ListView`'s `model.setProperty()` method to update existing items, but that yielded no visible result as well. Is there a specific property or method that I need to be aware of to ensure updates propagate correctly to the ListView? Any suggestions would be greatly appreciated! For context: I'm using Qml on Windows. Is there a better approach? I've been using Qml for about a year now. What's the best practice here?