/// <summary>
/// Activates the specified item.
/// </summary>
/// <param name="item">The item to activate.</param>
public override void ActivateItem(T item)
{
if (item != null && ReferenceEquals(item, ActiveItem))
{
if (IsActive)
{
ScreenHelper.TryActivate(item);
OnActivationProcessed(item, true);
}
return;
}
ChangeActiveItem(item, false);
}
/// <summary>
/// Called when deactivating.
/// </summary>
/// <param name="close">Inidicates whether this instance will be closed.</param>
protected override void OnDeactivate(bool close)
{
if (close)
{
foreach (var x in _items.OfType <IDeactivate>())
{
x.Deactivate(true);
}
_items.Clear();
}
else
{
ScreenHelper.TryDeactivate(ActiveItem, false);
}
}
/// <summary>
/// Activates the specified item.
/// </summary>
/// <param name="item">The item to activate.</param>
public override void ActivateItem(T item)
{
if (item == null)
{
return;
}
item = EnsureItem(item);
if (IsActive)
{
ScreenHelper.TryActivate(item);
}
OnActivationProcessed(item, true);
}
private void CloseItemCore(T item)
{
if (ReferenceEquals(item, ActiveItem))
{
var index = _items.IndexOf(item);
var next = DetermineNextItemToActivate(_items, index);
ChangeActiveItem(next, true);
}
else
{
ScreenHelper.TryDeactivate(item, true);
}
_items.Remove(item);
}
/// <summary>
/// Deactivates the specified item.
/// </summary>
/// <param name="item">The item to close.</param>
/// <param name="close">Indicates whether or not to close the item after deactivating it.</param>
public override async void DeactivateItem(T item, bool close)
{
if (item == null)
{
return;
}
if (!close)
{
ScreenHelper.TryDeactivate(item, false);
}
else
{
var result = await CloseStrategy.ExecuteAsync(new[] { item });
if (result.CanClose)
{
CloseItemCore(item);
}
}
}
/// <summary>
/// Activates the specified item.
/// </summary>
/// <param name="item">The item to activate.</param>
public override async void ActivateItem(T item)
{
if (item != null && ReferenceEquals(item, ActiveItem))
{
if (IsActive)
{
ScreenHelper.TryActivate(item);
OnActivationProcessed(item, true);
}
return;
}
var result = await CloseStrategy.ExecuteAsync(new[] { ActiveItem });
if (result.Item1)
{
ChangeActiveItem(item, true);
}
else
{
OnActivationProcessed(item, false);
}
}
private void CloseItemCore(T item)
{
ScreenHelper.TryDeactivate(item, true);
_items.Remove(item);
}
/// <summary>
/// Called when deactivating.
/// </summary>
/// <param name="close">Inidicates whether this instance will be closed.</param>
protected override void OnDeactivate(bool close)
{
ScreenHelper.TryDeactivate(ActiveItem, close);
}
/// <summary>
/// Called when activating.
/// </summary>
protected override void OnActivate()
{
ScreenHelper.TryActivate(ActiveItem);
}