Access a property of delegate in listview

[beemaneni]

Hi,
This is pretty simple but i lost somewhere when i am working on this .Here i post my example.
I need to read a property which is declared inside a delegate from its parent.How do i do ?

ListView{
        id: listView 
        property bool indeeee: listView.contentItem.childrenRect.check
        state: listView.indeeee ? "moved" : "" 
        delegate: delegateItem
    }
    Component{
        id: delegateItem
        Row{
            id: rowww
            spacing: 20
            property bool [COLOR="#FF0000"]check[/COLOR]:index===2 ? true : false
         } 
    }

ListView{
        id: listView 
        property bool indeeee: listView.contentItem.childrenRect.check
        state: listView.indeeee ? "moved" : "" 
        delegate: delegateItem
    }
    Component{
        id: delegateItem
        Row{
            id: rowww
            spacing: 20
            property bool [COLOR="#FF0000"]check[/COLOR]:index===2 ? true : false
         } 
    }

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I tried to read with listView.contentItem.childrenRect.check which says unable to assign undefined to bool

Regards
Bala B

[wysota]

You have to remember the delegate is a component so you don't have one delegate per view but rather one delegate per visible item. To access an item from a view you have ListView.currentItem, ListView.highlightItem or ListView.itemAt.

So for example to know whether the current item is checked, you'd do:

property bool indeeee: currentItem.check

property bool indeeee: currentItem.check

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However often you want to provide a relation in the other direction:

ListView {
  property int checkedIndex: -1
 
  delegate: MouseArea {
    // ...
    onClicked: ListView.view.checkedIndex = index // upon clicking I become the checked index in the view
  }
}

ListView {
  property int checkedIndex: -1

  delegate: MouseArea {
    // ...
    onClicked: ListView.view.checkedIndex = index // upon clicking I become the checked index in the view
  }
}

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Just remember that only the delegate root (and not its children) has the "ListView" attached property and the "index" property available.