protected override Script.IScriptCommand executeInner(ParameterDic pm, ItemsControl ic,
RoutedEventArgs evnt, IUIInput input, IList <IUIInputProcessor> inpProcs)
{
var scp = ControlUtils.GetScrollContentPresenter(ic);
if (scp != null)
{
AdornerLayer adornerLayer = ControlUtils.GetAdornerLayer(ic);
switch (AdornerMode)
{
case UIEventHub.AdornerMode.Attach:
if (adornerLayer == null)
{
return(ResultCommand.Error(new Exception("Adorner layer not found.")));
}
if (UIEventHubProperties.GetSelectedItemsAdorner(scp) == null)
{
//Create and register adorner.
SelectedItemsAdorner adorner = new SelectedItemsAdorner(scp);
pm.SetValue(SelectedItemsAdornerKey, adorner);
UIEventHubProperties.SetSelectedItemsAdorner(scp, adorner);
UIEventHubProperties.SetLastScrollContentPresenter(ic, scp); //For used when detach.
adornerLayer.Add(adorner);
}
break;
case UIEventHub.AdornerMode.Detach:
var lastScp = UIEventHubProperties.GetLastScrollContentPresenter(ic); //For used when detach.
var lastAdorner = UIEventHubProperties.GetSelectedItemsAdorner(scp);
if (lastAdorner != null)
{
adornerLayer.Remove(lastAdorner);
}
UIEventHubProperties.SetLastScrollContentPresenter(ic, null);
UIEventHubProperties.SetSelectedItemsAdorner(scp, null);
pm.SetValue <Object>(SelectedItemsAdornerKey, null);
break;
case UIEventHub.AdornerMode.Update:
var updateAdorner = pm.GetValue <SelectedItemsAdorner>(SelectedItemsAdornerKey) ??
UIEventHubProperties.GetSelectedItemsAdorner(scp);
if (updateAdorner == null)
{
return(ResultCommand.Error(new Exception("Adorner not found.")));
}
Point current = pm.GetValue <Point>(CurrentPositionAdjustedKey);
if (updateAdorner.CurrentPosition.X == -1 && updateAdorner.CurrentPosition.Y == -1)
{
//If the adorner is not initialized.
updateAdorner.SetValue(SelectedItemsAdorner.CurrentPositionProperty, current);
updateAdorner.SetValue(SelectedItemsAdorner.ItemsProperty, ic.ItemsSource);
}
else
{
updateAdorner.SetValue(SelectedItemsAdorner.CurrentPositionProperty, current);
}
break;
}
}
return(NextCommand);
}
public static void SetSelectedItemsAdorner(DependencyObject target, SelectedItemsAdorner value)
{
target.SetValue(SelectedItemsAdornerProperty, value);
}
