public void ActivateControl()
{
var controlToFocus = this.ViewModel.ParametersPage.IdocItemsView.CurrentItem == null
? (Control)this.IdocItemsComboBox
: this.ParameterTreeView;
if (controlToFocus == null)
{
return;
}
var isVisibleChanged = new ValueHolder <DependencyPropertyChangedEventHandler>();
isVisibleChanged.Value =
(sender, e) =>
{
if (!controlToFocus.IsVisible)
{
return;
}
var f = controlToFocus.Focus();
Trace.WriteLine(f);
controlToFocus.IsVisibleChanged -= isVisibleChanged.Value.EnsureNotNull();
};
if (controlToFocus.IsVisible)
{
isVisibleChanged.Value(controlToFocus, new DependencyPropertyChangedEventArgs());
}
else
{
controlToFocus.IsVisibleChanged += isVisibleChanged.Value.EnsureNotNull();
}
}
