ItemsSource is empty in constructor of Custom Bound Horizontal ScrollView

ItemsSource is empty in constructor of Custom Bound Horizontal ScrollView

I'm having trouble updating Cheesebarons horizontal list view to the new
v3 MvvmCross. Everything seems to be working correctly except in the
constructor of my "BindableHorizontalListView" control the ItemsSource of
the adapter is null. Which is weird because the context shows that the
view-model property I am attempting to bind to shows very clearly there
are 3 items and the binding seems very straightforward. What am I missing?
I hope I've included enough of the code. I've also tried binding it via
fluent bindings on the "OnViewModelSet" event with the same result.
AXML
<BindableHorizontalListView
android:id="@+id/listView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
local:MvxBind="ItemsSource DevicesList; ItemClick ItemSelected"
local:MvxItemTemplate="@layout/devices_horizontal_list_item" />
BindableHorizontalListView control
using System.Collections;
using System.Windows.Input;
using Android.Content;
using Android.Util;
using Cirrious.MvvmCross.Binding.Attributes;
using Cirrious.MvvmCross.Binding.Droid.Views;
namespace Project.Droid.Controls
{
public class BindableHorizontalListView
: HorizontalListView //Which inherits from AdapterView<BaseAdapter>
{
public BindableHorizontalListView(Context context, IAttributeSet
attrs)
: this(context, attrs, new MvxAdapter(context))
{
}
public BindableHorizontalListView(Context context, IAttributeSet
attrs, MvxAdapter adapter)
: base(context, attrs)
{
var itemTemplateId =
MvxAttributeHelpers.ReadListItemTemplateId (context, attrs);
adapter.ItemTemplateId = itemTemplateId;
Adapter = adapter;
SetupItemClickListener();
InitView ();
}
public new MvxAdapter Adapter
{
get { return base.Adapter as MvxAdapter; }
set
{
var existing = Adapter;
if (existing == value)
return;
if (existing != null && value != null)
{
value.ItemsSource = existing.ItemsSource;
value.ItemTemplateId = existing.ItemTemplateId;
}
base.Adapter = value;
}
}
[MvxSetToNullAfterBinding]
public IEnumerable ItemsSource
{
get { return Adapter.ItemsSource; }
set { Adapter.ItemsSource = value; this.Reset (); }
}
public int ItemTemplateId
{
get { return Adapter.ItemTemplateId; }
set { Adapter.ItemTemplateId = value; }
}
public new ICommand ItemClick { get; set; }
private void SetupItemClickListener()
{
base.ItemClick += (sender, args) =>
{
if (null == ItemClick)
return;
var item = Adapter.GetItem(args.Position) as
Java.Lang.Object;
if (item == null)
return;
if (item == null)
return;
if (!ItemClick.CanExecute(item))
return;
ItemClick.Execute(item);
};
}
}
}
ViewModel
[Activity (Label = "Device", ScreenOrientation = ScreenOrientation.Portrait)]
public class DeviceView : MvxActivity
{
protected override void OnCreate (Bundle bundle)
{
base.OnCreate (bundle);
SetContentView(Resource.Layout.device);
}
}
If only there was PCL support in XAM STUDIO I would just step in and see
how the other controls are doing it!!!!