ListView overshoot limit

IntruderExcluder

Is there any way to restrict user from infinite overshoot when flicking? I want to implement android-like refresh for ListView, problem is that I want to set some sort of maximum for vertical overshooting, but I do not see any property for that.

Any ideas? Maybe I'm missing something?

Markkyboy

contentHeight?

as an 'inherited member' of ListView: https://doc.qt.io/qt-5/qml-qtquick-flickable.html#contentHeight-prop

IntruderExcluder

Didn't get your idea. I mean I have an ListView with default bounds behaviour. Being at top of list I can drag its contents to a bottom direction, to simulate refresh request, like it is made in Android. The problem here is that I cannot restrict bottom dagging distance. Another problem is that I don't know ho to properly reset mouse grab.

IntruderExcluder

Ok, just made it with a bit of C++ magic.

ListView {
        readonly property real maxOvershoot: 100
        property bool resetting: false

        boundsBehavior: contentY > 0 ? ListView.StopAtBounds : ListView.DragOverBounds // Overbound draggind allowed only at top of list
        model: 20

        onVerticalOvershootChanged: {
            if (Math.abs(verticalOvershoot) >= maxOvershoot && !resetting) {
                resetting = true;
                returnToBounds();
                Test.ungrab(this); // C++ grab trick
            }
        }

        onContentYChanged: {
            if (contentY === 0.0 && resetting) {
                resetting = false;
            }
        }

        delegate: Rectangle {
...
        }
    }

And C++ code is quite simple:

    Q_INVOKABLE void ungrab(QQuickItem* list) {
        if (list != nullptr) {
            list->ungrabMouse();
            list->ungrabTouchPoints();
        }
    }