Loading...

XML

Word

Printable

Type: Bug
Resolution: Fixed
Priority: P4: Low
Fix Version/s: 6.5.1, 6.6.0
Affects Version/s: 5.15.2, 5.15.6, 6.2.0
Component/s: Quick: Core Declarative QML
Labels:
- Reported_by_support_standard

Commits:
37c25c6e7 (dev), 8fae0aa4a (6.5)

If Listview has a delegate with height binding to ListView, it creates all the delegate instances in the start and then delete them to keep only required ones.
Please refer to the attached sample.

    ListView {
        id: listView
        anchors.fill: parent
        onHeightChanged: console.log("ListView height changed to:", height)
        model: listModel
        delegate: Rectangle {
            width: listView.width / 2
            height: listView.height
            border.width: 1
            radius: 10
            Text {
                anchors.centerIn: parent
                text: name
            }
            Component.onCompleted: console.log("onCompleted:", ListView.view, index)
            Component.onDestruction: console.log("onDestruction:", ListView.view, index)
        }
    }

If Model has 7 items, the output is

qml: onCompleted: QQuickListView(0x27e9478f000) 0
qml: onCompleted: QQuickListView(0x27e9478f000) 1
qml: onCompleted: QQuickListView(0x27e9478f000) 2
qml: onCompleted: QQuickListView(0x27e9478f000) 3
qml: onCompleted: QQuickListView(0x27e9478f000) 4
qml: onCompleted: QQuickListView(0x27e9478f000) 5
qml: onCompleted: QQuickListView(0x27e9478f000) 6
qml: ListView height changed to: 480
qml: onDestruction: QQuickListView(0x27e9478f000) 6
qml: onDestruction: QQuickListView(0x27e9478f000) 5
qml: onDestruction: QQuickListView(0x27e9478f000) 4
qml: onDestruction: QQuickListView(0x27e9478f000) 3
qml: onDestruction: QQuickListView(0x27e9478f000) 2