Trouble with MapPolyLine and ListModel

Mikkie

I have a ListModel with some coordinates. When I assign this model to the "path" property of the MapPolyLine, no line displays. I can use the addCoordinate to add points manually and that does draw the line. The code below is inside my Map{}.

Pointers would be welcome, perhaps also pointer to good book on QML that would explain/stop problems like this.

    ListModel
    {
        id: assetsPolylineList
        ListElement
        {
            latitude: -28.9
            longitude: 25.1
        }
        ListElement
        {
            latitude: -28.2
            longitude: 25.3
        }
        ListElement
        {
            latitude: -28.4
            longitude: 25.5
        }
        ListElement
        {
            latitude: -28.6
            longitude: 25.7
        }
    }
    
    MapPolyline
    {
        id: assetsPolyline
        line.color: "red"
        line.width: 5
        visible : true
        path : assetsPolylineList
    }

Pablo J. Rogina

@Mikkie I guess you need to use a QML list not a ListModel
In addition, why you cannot specify the list directly for the path property as shown here?

Pablo J. Rogina

@Mikkie UPDATE: I was able to play with some code in order to get a simple QML list from the ListModel. Here's a snippet of my working code:

    Map {
        id: map
        anchors.fill: parent
        plugin: mapPlugin
        center: QtPositioning.coordinate(-28.2, 25.3)
        zoomLevel: 8
        function assetsPolylineListAsList() {
            var list = []
            for(var i = 0; i < assetsPolylineList.count; ++i) {
                list.push(
                    {
                        latitude: assetsPolylineList.get(i).latitude,
                        longitude: assetsPolylineList.get(i).longitude
                    }
                );
            }
            return list
        }
        MapPolyline
        {
            id: assetsPolyline
            line.color: "blue"
            line.width: 3
            visible : true
            path : map.assetsPolylineListAsList()
        }