Browsing through nested items in XmlListModel: XPath Query question

mpvader2

Hi All,

I am trying to make a little program that iterates through an xmlfile with childs that are actually submenus. I am almost there, the last thing missing is a way to tell the ListView delegate what query it should pass back to the XmlListModel when the item is clicked. And also a query to determine if certain children exists. I find it a bit hard to explain, please have a look at below example. What I really want is to get rid of the 'subMenuQuery' element in the xml file. Can that be done?

So line 14 in the qml file needs to be some more elaborate XPath query. Or perhaps in line 24 I can find out which index this listviewitem has, so I can use it to create a string containing the new query for the XmlListModel?

For your reference, the codes. First the XML File
@
<?xml version="1.0" encoding="utf-8"?>
<items>
<item>
<title>Battery voltage</title>
<value>13.4V</value>
</item>
<item>
<title>Battery current</title>
<value>+0.3A</value>
</item>
<item>
<title>Submenu</title>
<value>-90Ah</value>
<subMenuQuery>/items/item[3]/items/item</subMenuQuery>
<items>
<item>
<title>Submenitem1</title>
<value>1</value
</item>
<item>
<title>Submenitem2</title>
<value>2</value
</item>
</items>
</item>
</items>
@

The qml file:
@
import QtQuick 1.0

Rectangle {
width: 480
height: 272

XmlListModel {
    id: xmlModel
    source: "lynxshunt.xml"
    query: "/items/item"

    XmlRole { name: "title"; query: "title/string()" }
    XmlRole { name: "value"; query: "value/string()" }
    XmlRole { name: "subMenuQuery"; query: "subMenuQuery/string()" }
}

ListView {
    id: listView;
    anchors.fill: parent;
    model: xmlModel;
    delegate: MyListItemDelegate {
        deviceName: title
        deviceValue: listView.currentIndex.toString()
        submenuQuery: subMenuQuery
        lv: xmlModel

    }
}

}

@

The delegate:
@
import QtQuick 1.0

Rectangle {
id: rectangle1
width: 480
height: 54

property string deviceName: "";
property string deviceValue: "";
property string submenuQuery: "";
property XmlListModel lv;

MouseArea {
    anchors.fill: parent
    onClicked: {
        if (submenuQuery != "") { lv.query = submenuQuery }
    }
}

Text {
    id: deviceNameText
    anchors.left:  parent.left; anchors.leftMargin: 20
    anchors.top:  parent.top; anchors.topMargin: 5
    text: rectangle1.deviceName
}

Text {
    id: deviceSummaryText
    anchors.left:  parent.left; anchors.leftMargin: 20
    anchors.bottom:  parent.bottom; anchors.bottomMargin: 8
    text: rectangle1.deviceValue
}

}
@

Merinas

What I've understood of your problem, is you need a support for nested xml in qml ?
If that so , there is no support yet but you could follow the "bug report":http://bugreports.qt.nokia.com/browse/QTBUG-13688?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel#issue-tabs .