[solved] How to extract global data for xml width XmlListModel

[Merinas]

Hi,

Before I have been using ListModel, now I used an XmlListModel, I want to know how to extract a global data from an xml file like is done in an example from QML Data Model :

@ Rectangle {
width: 200; height: 200

 ListModel {
     id: fruitModel
     property string language: "en"
     ListElement {
         name: "Apple"
         cost: 2.45
     }
     ListElement {
         name: "Orange"
         cost: 3.25
     }
     ListElement {
         name: "Banana"
         cost: 1.95
     }
 }

 Component {
     id: fruitDelegate
     Row {
             Text { text: " Fruit: " + name; color: ListView.view.fruit_color }
             Text { text: " Cost: $" + cost }
             Text { text: " Language: " + ListView.view.model.language }
     }
 }

 ListView {
     property color fruit_color: "green"
     model: fruitModel
     delegate: fruitDelegate
     anchors.fill: parent
 }

}@

In this example the global var is defined at line 6. Can someone explain me how to do such thing with XmlListModel.
Thanks

[mbrasser]

Hi,

Unfortunately, there isn't yet a real elegant solution to querying XML files for non-list data (see http://bugreports.qt.nokia.com/browse/QTBUG-12953 for one possible way of handling this in the future). One thing you could try is to treat the whole file like a "list of one object", use XmlListModel to query for that object, and use model.get(0).language to obtain the value.

Regards,
Michael

[Merinas]

Thanks for your answer.

That what I thought. Is there any performance issue if we create many XmlListModel of the same xml file? Is the file be "re-parse" for each XmlListModel which use it ?

[mbrasser]

Yes, unfortunately it will be re-parsed by each model.

Michael

[Merinas]

Ok, thanks. I hope you will find a elegant way for nested xml tree.