private void InternalSetActiveContent(LayoutContent currentValue, LayoutContent newActiveContent)
{
RaisePropertyChanging("ActiveContent");
if (currentValue != null)
{
currentValue.IsActive = false;
}
_activeContent = new WeakReference(newActiveContent);
currentValue = ActiveContent;
if (currentValue != null)
{
currentValue.IsActive = true;
}
RaisePropertyChanged("ActiveContent");
_activeContentSet = currentValue != null;
if (currentValue != null)
{
if (currentValue.Parent is LayoutDocumentPane || currentValue is LayoutDocument)
{
LastFocusedDocument = currentValue;
}
}
else
{
LastFocusedDocument = null;
}
}
public int IndexOf(LayoutContent content)
{
var anchorableChild = content as LayoutAnchorable;
if (anchorableChild == null)
{
return(-1);
}
return(Children.IndexOf(anchorableChild));
}
internal void OnLayoutElementRemoved(LayoutElement element)
{
if (element.Descendents().OfType <LayoutContent>().Any(c => Equals(c, LastFocusedDocument)))
{
LastFocusedDocument = null;
}
if (element.Descendents().OfType <LayoutContent>().Any(c => Equals(c, ActiveContent)))
{
ActiveContent = null;
}
ElementRemoved?.Invoke(this, new LayoutElementEventArgs(element));
}