/// <summary>
/// Updates the Breadcrumb list and resets all the leaves (including the active one).
/// </summary>
/// <param name="group">The group to activate.</param>
public void SetGroup(IKeePassGroup group)
{
// If this is an effective no-op, do nothing.
if (group == ActiveGroup)
{
return;
}
int originalChildCount = 0;
// Remove the children changed handler from the current group.
if (ActiveGroup != null)
{
((INotifyCollectionChanged)ActiveGroup.Children).CollectionChanged -= ChildrenChangedHandler;
originalChildCount = ActiveGroup.Children.Count;
}
// Are we clearing everything?
if (group == null)
{
this.breadcrumbs.Clear();
}
else
{
// Are we navigating upwards from the current tree?
if (ActiveGroup != null && ActiveGroup.HasAncestor(group))
{
int breadcrumbLastIndex = this.breadcrumbs.Count - 1;
// Pop off breadcrumbs until we're done
while (this.breadcrumbs[breadcrumbLastIndex].Group != group)
{
this.breadcrumbs.RemoveAt(breadcrumbLastIndex--);
}
}
// Are we navigating down a level to a new child of the current Group?
else if (group.Parent != null && group.Parent.Equals(ActiveGroup))
{
this.breadcrumbs.Add(new Breadcrumb(group));
}
// Something more catastrophic is happened, so just reset the list
else
{
this.breadcrumbs.Clear();
while (group != null)
{
this.breadcrumbs.Insert(0, new Breadcrumb(group, (group.Parent == null)));
group = group.Parent;
}
}
((INotifyCollectionChanged)ActiveGroup.Children).CollectionChanged += ChildrenChangedHandler;
}
if (ActiveLeaf != null && group != ActiveLeaf.Parent)
{
// Remove the ActiveLeaf if we're changing the ActiveGroup
ActiveLeaf = null;
}
OnPropertyChanged(nameof(ActiveGroup));
if (originalChildCount != 0 || (ActiveGroup != null && ActiveGroup.Children.Count != 0))
{
RaiseLeavesChanged();
}
}
