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Type: Bug
Resolution: Fixed
Priority: P1: Critical
Fix Version/s: None
Affects Version/s: 5.15.12, 6.5.0 Beta1
Component/s: Quick: Controls 2
Labels:
- Reported_by_support_standard

Platform/s:

All
Commits:
db8f3607e (dev), 4e535be5c (6.5), daca3c6d8 (tqtc/lts-6.2)

After the fix for https://bugreports.qt.io/browse/QTBUG-104983

https://codereview.qt-project.org/c/qt/qtdeclarative/+/422252

There is still a problem:

If a scrollview contentitem is assigned afterwards, as opposed as declared in,

QQuickControlPrivate::unhideOldItem will be called unconditionally, disregarding current bindings between scrollbar policy and visiblity that may be declared in the controls style.

so for instance if a scrollbar had a policy of AlwaysOff, it will be shown anyways.

The attached minimal example will show a listview with the horizontal scrollbar shown even if has an alwaysoff policy

import QtQuick
import QtQuick.Controls

ApplicationWindow {
    width: 640
    height: 480
    visible: true

    ListView {
        id: otherView
        clip: true

        model: 100
        delegate: Text {
            text: modelData
        }
    }

    Component.onCompleted: cardsView.contentItem = otherView

    ScrollView {
        id: cardsView
        width: 200
        height: 200
        background: Rectangle {
            color: "transparent"
            border.width: 1
        }

        ScrollBar.horizontal.policy: ScrollBar.AlwaysOff
    }
}