"Cannot assign a value directly to a grouped property" what is it?

r3d9u11

Hi. I'm facing with a strange error: "Cannot assign a value directly to a grouped property" when tried to add childs to my component.
there is example of parent QML (Parent.qml):

import QtQuick 2.9
import QtQuick.Layouts 1.3
import QtQuick.Controls 2.2

GroupBox {
    property alias menuItems: itemsList
    GridLayout {
            id: itemsList
        }
}

child QML (Child.qml):

import QtQuick 2.9
import QtQuick.Layouts 1.3
import QtQuick.Controls 2.2

Parent {
    title: qsTr("Child's Title")
    menuItems {
        Label {
            text: "hello"
        }
    }
}

Main Form QML:

...
   Child {
        x: 10
        y: 10
        width: 300
        height: 300
        visible: true
    }
...

Is it possible to add childs to parent QML via alias ?
What I'm doing wrong?

But application successfully runs if I remove the following code from Child.qml:

menuItems {
    Label {
        text: "hello"
    }
}

Thanks!

r3d9u11

@r3d9u11 think I should use Loader, but I don't know how to add multiple objects via Loader (or something else)

I didn't find any other way except duplicate GroupBox with all setted properties and logic to all kinds of Child.qml and load it through Loader ;-(

IntruderExcluder

You can set default property if you want to add childs to a some non-obvious component. Lets say you have an CustomContainer:

...
Item {
    id: root
    Text { id: label; ... }
    Column {
        id: column
    }
}

And you want childs described into CustomContainer automatically be added to Column, not inside Item. For this you can use default modificator for property:

...
Item {
    id: root
    default property alias contentData: column.data
...

So, everything described at CustomContainer will be a child of your Column.

r3d9u11

@IntruderExcluder many thanks for that hint!
it is a bit confusing design, but it works perfect