[Qt-qml] Dynamically created items and properties

[Jan Ekholm]

I tried to change the Unit item to really, really bind to the C++ properties 
using this change:

> Item {
> 
>     function createUnits (component) {
>         if ( component.status == Component.Ready ) {
>             // get all units, this is a C++ list of Unit*
>             var unit_list = scenario.units.units;
> 
>             for ( var index = 0; index < unit_list.length; index++ ) {
>                 // the c++ unit, a Unit*
>                 var unit = unit_list[index]
> 
>                 // create a new item with the root Item as parent, see
>                 // the "id" property
>                 var item = component.createObject( units );
> 
>                 if (item == null) {
>                     console.log( "Units.createUnits: failed to create unit"
> ); }
>                 else {
                  
                      item.setup( index )

>                 }
>             }
>         }
> 
>         else if (component.status == Component.Error) {
>             // ugh
>         }
>     }
> 
>     function loadComponent () {
>         // load the component
>         var component = Qt.createComponent("Unit.qml");
> 
>         // create the real items
>         createUnits( component );
>     }
> 
>     Component.onCompleted: loadComponent();
>     id: units
> }

And the Unit.qml file would have this function to perform the binding:

Image {

    function setup (index) {
            x       = scenario.units.units[index].x
            y       = scenario.units.units[index].y
            source  = scenario.units.units[index].icon
            unit_id = scenario.units.units[index].id
    }

    property int unit_id
    ...
}

The "scenario.units.units[index]" maps to a real C++ Unit* and that code has 
worked fine in several other contexts. Still, no go. The item just does not 
react to property changes.


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    starvation too, o'course.
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