//ContentPresenter _presenter;
// https://stackoverflow.com/questions/1517743/in-wpf-how-can-i-determine-whether-a-control-is-visible-to-the-user
protected override void OnApplyTemplate()
{
if (_initialized)
{
throw new System.Exception("only call once");
}
base.OnApplyTemplate();
ScrutinizeItemTemplate();
_HeaderScrollViewer = (ScrollViewer)GetTemplateChild("HeaderScrollViewer");
_HyperGridHeader = (HyperGridHeader)GetTemplateChild("HeaderControl");
_HyperGridHeader.ItemsSource = this.Header;
_MainGrid = (Grid)GetTemplateChild("MainGrid");
//_MainGrid.SizeChanged += MainGrid_SizeChanged;
_ListView = (ListView)GetTemplateChild("ListView");
// Force the ListView to load it's template, so we can get a reference to the scrollviewer.
_ListView.ApplyTemplate();
_scrollviewer = VenturaVisualTreeHelper.FindDescendant <ScrollViewer>(_ListView);;
_scrollviewer.ViewChanged += ScrollViewer_ViewChanged;
_ListView.SelectionChanged += ListView_SelectionChanged;
//_ListView.PointerPressed += ListView_PointerPressed;
_ListView.DoubleTapped += ListView_DoubleTapped;
_ListView.SelectedIndex = this.SelectedIndex;
_ListView.RegisterPropertyChangedCallback(ListView.SelectedItemProperty, new DependencyPropertyChangedCallback(ListView_SelectedItem_PropertyChanged));
//// Bind HyperGrid.SelectedIndex to _ListView.SelectedIndex etc...
//Binding b1 = new Binding { Source = this, Path = new PropertyPath("SelectedIndex"), Mode = BindingMode.TwoWay };
//Binding b2 = new Binding { Source = this, Path = new PropertyPath("SelectedItem"), Mode = BindingMode.TwoWay };
//_ListView.SetBinding(ListView.SelectedIndexProperty, b1);
//_ListView.SetBinding(ListView.SelectedItemProperty, b2);
_initialized = true;
}