Instantiator Active Bug

fcarney

If active is false, and I modify the ListModel dynamically, then the Instantiator will create "some" objects. I have found if there were ListElements defined first, then each insert into the ListModel would cause the Instantiator to create those first. Either way, it shouldn't be creating anything.

I was trying to reproduce the code where the bug started. That is why there is a StackView and Page. Probably not related to the issue.

import QtQuick 2.12
import QtQuick.Window 2.12
import QtQuick.Controls 2.15
import QtQml.Models 2.15

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Instantiator Active Bug")

    ListModel {
        id: listmodel

        dynamicRoles: true

        /*
        ListElement{name:"not one"}
        ListElement{name:"not two"}
        ListElement{name:"not three"}
        */
    }

    Component.onCompleted: {
        if(1){
            listmodel.insert(listmodel.count, {name: "one"})
            listmodel.insert(listmodel.count, {name: "two"})
            listmodel.insert(listmodel.count, {name: "three"})
        }
    }

    StackView {
        anchors.fill: parent

        initialItem: page1
    }

    Component {
        id: page1

        Page {
            Instantiator {
                id: instantiator

                // https://doc.qt.io/qt-5/qml-qtqml-models-instantiator.html#active-prop
                active: false

                model: listmodel

                delegate: Text {
                    width: 100
                    height: 20

                    text: name

                    Component.onCompleted: console.log(instantiator.active, name)
                }

                onObjectAdded: column.data.push(object)

                onActiveChanged: console.log(active)
            }

            Column {
                id: column
            }
        }
    }
}

I think I have to figure out how to use just one Instantiator in my code. I will submit a bug report, but people might be interested in this so I am posting here. I tried multiple versions of import QtQml.Models and it didn't have an effect.

fcarney

Bug Report