/// <summary>
/// Provides handling for the KeyDown event.
/// </summary>
/// <param name="e">Key event args.</param>
protected override void OnKeyDown(KeyEventArgs e)
{
base.OnKeyDown(e);
if (e.Handled || !IsEnabled || IsLocked)
{
return;
}
// Some keys (e.g. Left/Right) need to be translated in RightToLeft mode
Key invariantKey = InteractionHelper.GetLogicalKey(FlowDirection, e.Key);
bool isSelected = IsSelected;
switch (ExpandDirection)
{
case ExpandDirection.Down:
if ((isSelected && invariantKey == Key.Up) || (!isSelected && invariantKey == Key.Down))
{
IsSelected = !isSelected;
}
break;
case ExpandDirection.Up:
if ((isSelected && invariantKey == Key.Down) || (!isSelected && invariantKey == Key.Up))
{
IsSelected = !isSelected;
}
break;
case ExpandDirection.Left:
if ((isSelected && invariantKey == Key.Right) || (!isSelected && invariantKey == Key.Left))
{
IsSelected = !isSelected;
}
break;
case ExpandDirection.Right:
if ((isSelected && invariantKey == Key.Left) || (!isSelected && invariantKey == Key.Right))
{
IsSelected = !isSelected;
}
break;
}
}
/// <summary>
/// Initializes a new instance of the AccordionItem class.
/// </summary>
public AccordionItem()
{
// initialize to no action.
ScheduledAction = AccordionAction.None;
DefaultStyleKey = typeof(AccordionItem);
_interaction = new InteractionHelper(this);
}
/// <summary>
/// Initializes a new instance of the <see cref="Accordion"/> class.
/// </summary>
public Accordion()
{
DefaultStyleKey = typeof(Accordion);
ItemsControlHelper = new ItemsControlHelper(this);
ObservableCollection<object> items = new ObservableCollection<object>();
ObservableCollection<int> indices = new ObservableCollection<int>();
SelectedItems = items;
SelectedIndices = indices;
items.CollectionChanged += OnSelectedItemsCollectionChanged;
indices.CollectionChanged += OnSelectedIndicesCollectionChanged;
_scheduledActions = new List<AccordionItem>();
SizeChanged += OnAccordionSizeChanged;
Interaction = new InteractionHelper(this);
}