/// <summary>
/// Activates the specified item.
/// </summary>
/// <param name="item">The item to activate.</param>
public override void ActivateItem(TC item)
{
if (item != null && item.Equals(ActiveItem))
{
if (IsActive)
{
ScreenExtensions.TryActivate(item);
OnActivationProcessed(item, true);
}
return;
}
CloseStrategy.Execute(new[] { ActiveItem }, (canClose, items) =>
{
if (canClose)
{
ChangeActiveItem(item, true);
}
else
{
OnActivationProcessed(item, false);
}
});
}
/// <summary>
/// Called when deactivating.
/// </summary>
/// <param name="close">Indicates whether this instance will be closed.</param>
protected override void OnDeactivate(bool close)
{
if (close)
{
items.OfType <IDeactivate>().Apply(x => x.Deactivate(true));
items.Clear();
}
else
{
ScreenExtensions.TryDeactivate(ActiveItem, false);
}
}
/// <summary>
/// Changes the active item.
/// </summary>
/// <param name="newItem">The new item to activate.</param>
/// <param name="closePrevious">Indicates whether or not to close the previous active item.</param>
protected virtual void ChangeActiveItem(TC newItem, bool closePrevious)
{
ScreenExtensions.TryDeactivate(activeItem, closePrevious);
newItem = EnsureItem(newItem);
if (IsActive)
{
ScreenExtensions.TryActivate(newItem);
}
activeItem = newItem;
NotifyOfPropertyChange("ActiveItem");
OnActivationProcessed(activeItem, true);
}
/// <summary>
/// Activates the specified item.
/// </summary>
/// <param name="item">The item to activate.</param>
public override void ActivateItem(T item)
{
if (item != null && item.Equals(ActiveItem))
{
if (IsActive)
{
ScreenExtensions.TryActivate(item);
OnActivationProcessed(item, true);
}
return;
}
ChangeActiveItem(item, false);
}
/// <summary>
/// Activates the specified item.
/// </summary>
/// <param name="item">The item to activate.</param>
public override void ActivateItem(TC item)
{
if (item == null)
{
return;
}
item = EnsureItem(item);
if (IsActive)
{
ScreenExtensions.TryActivate(item);
}
OnActivationProcessed(item, true);
}
private void CloseItemCore(T item)
{
if (item.Equals(ActiveItem))
{
var index = items.IndexOf(item);
var next = DetermineNextItemToActivate(items, index);
ChangeActiveItem(next, true);
}
else
{
ScreenExtensions.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 void DeactivateItem(TC item, bool close)
{
if (item == null)
{
return;
}
if (close)
{
CloseStrategy.Execute(new[] { item }, (canClose, closable) =>
{
if (canClose)
{
CloseItemCore(item);
}
});
}
else
{
ScreenExtensions.TryDeactivate(item, false);
}
}
private void CloseItemCore(TC item)
{
ScreenExtensions.TryDeactivate(item, true);
items.Remove(item);
}
/// <summary>
/// Called when activating.
/// </summary>
protected override void OnActivate()
{
ScreenExtensions.TryActivate(ActiveItem);
}
/// <summary>
/// Called when deactivating.
/// </summary>
/// <param name="close">Indicates whether this instance will be closed.</param>
protected override void OnDeactivate(bool close)
{
ScreenExtensions.TryDeactivate(ActiveItem, close);
}