[qazwsx]

hi all,

i couldnt understand the attached properties in qml. can anyone help me with it?

 Component {
     id: myDelegate
     Text {
         text: "Hello"
         color: ListView.isCurrentItem ? "red" : "blue"
     }
 } 



ListView {
     delegate: myDelegate
 }

how do delegates work?
what exactly is attached property and how do attached properties work here?

[nicolai]

The component "myDelegate" will be created/instantiated by
the ListView for every visible item in the model.

Sometimes you need some information for your delegate component
which is not accessible in you qml source. isCurrentItem for example
is a property of your ListView-items, which indicates if this item is
the currently selected one. But the only one who is aware about
the isCurrentItem property is your ListView, when it actually created
the ListView-items. So the listview attaches this propery on your delegate
component when it creates this component for its ListView-item.