private static bool NoVisibleSiblingExists(List <DependencyObject> children)
{
foreach (DependencyObject Child in children)
{
if (AutoSeparator.IsVisible(Child))
{
return(false);
}
}
return(true);
}
private static bool SeparatorAlreadyThere(List <DependencyObject> children)
{
foreach (DependencyObject Child in children)
{
if (Child is Separator && AutoSeparator.IsVisible(Child))
{
return(true);
}
else
{
return(false);
}
}
return(false);
}
private void UpdateVisibility()
{
if (this.parent != null)
{
List <DependencyObject> PreviousChildren = new List <DependencyObject>();
List <DependencyObject> FollowingChildren = new List <DependencyObject>();
bool FoundMyself = false;
for (int Index = 0; Index < VisualTreeHelper.GetChildrenCount(this.parent); Index++)
{
DependencyObject Child = VisualTreeHelper.GetChild(this.parent, Index);
// ReSharper disable once PossibleUnintendedReferenceComparison
if (Child == this)
{
FoundMyself = true;
}
else
{
if (FoundMyself)
{
FollowingChildren.Add(Child);
}
else
{
PreviousChildren.Add(Child);
}
}
}
PreviousChildren.Reverse();
if (AutoSeparator.NoVisibleSiblingExists(PreviousChildren) || AutoSeparator.NoVisibleSiblingExists(FollowingChildren) || AutoSeparator.SeparatorAlreadyThere(FollowingChildren))
{
this.Visibility = Visibility.Collapsed;
}
else
{
this.Visibility = Visibility.Visible;
}
}
}
