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  1. Qt
  2. QTBUG-41207

ListView cacheBuffer: overshooting flickable bounds not working when using asynchornous Loader delegates which change height

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    • Icon: Bug Bug
    • Resolution: Unresolved
    • Icon: P4: Low P4: Low
    • None
    • 5.3.0
    • Quick: Core Declarative QML
    • None
    • Ubuntu 14.10

      When using Flickable.DragAndOvershootBounds boundsBehavior with a cacheBuffer and changing a delegates height after it's been created, if you flick past the end of the listview, it adjusts back before the end rather than at the end.

      using boundsBehaviour: Flickable.StopAtBounds doesn't show the same problem.

      import QtQuick 2.1

ListView {
    model: 50

    width: 200
    height: 300

    // Only cache some of the delegates
    cacheBuffer: height * 2
    interactive: true

    delegate: Loader {
        id: loader
        asynchronous: true
        width: ListView.view.width

        sourceComponent: Component {
            Rectangle {
                Text {
                    text: "menuItem" + index
                    anchors.fill: parent
                }

                anchors { left: parent.left; right: parent.right }
                height: 40
                color: Qt.rgba(Math.random(), Math.random(), Math.random(), 0.4)

                Component.onCompleted: height = 60
            }
        }
    }
}

        1. ListView.ogv
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            qt.team.quick.subscriptions Qt Quick and Widgets Team
            dednick Nick Dedekind
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              Created:
              Updated:

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