// Raises the GameProperty.Changed and GameObject.PropertyChanged events.
internal void OnChanged(GameProperty <T> property, T oldValue, T newValue)
{
var handler = Changed;
var gameObject = property.Owner;
if (handler != null || gameObject.NeedToCallPropertyChanged)
{
// GameProperty.Changed or GameOwner.PropertyChanged must be called because event handlers
// are registered.
// Get args from resource pool
var args = GamePropertyEventArgs <T> .Create(property, oldValue, newValue);
// Call GameProperty.Changed event handlers.
if (handler != null)
{
handler(gameObject, args);
}
// Call the virtual OnPropertyChanged method of the GameObject.
gameObject.OnPropertyChanged(property, oldValue, newValue);
// Call GameObject to raise GameObject.PropertyChanged event.
gameObject.OnPropertyChanged(args);
gameObject.OnPropertyChanged(property.Metadata.PropertyChangedEventArgs);
args.Recycle();
}
else
{
// Call the virtual OnPropertyChanged method of the GameObject.
// (Derived classes can override this method.)
gameObject.OnPropertyChanged(property, oldValue, newValue);
}
}
/// <overloads>
/// <summary>
/// Raises the <see cref="PropertyChanged"/> event.
/// </summary>
/// </overloads>
///
/// <summary>
/// Raises the <see cref="PropertyChanged"/> event.
/// </summary>
/// <param name="eventArgs">
/// <see cref="GamePropertyEventArgs{T}"/> object that provides the arguments for the event.
/// </param>
internal void OnPropertyChanged <T>(GamePropertyEventArgs <T> eventArgs)
{
var handler = PropertyChanged;
if (handler != null)
{
handler(this, eventArgs);
}
}
// Raises the Changing event.
internal void OnChanging(GameProperty <T> property, T oldValue, ref T newValue)
{
var handler = Changing;
if (handler != null)
{
// Get args from resource pool.
var args = GamePropertyEventArgs <T> .Create(property, oldValue, newValue);
// Call event handlers.
handler(property.Owner, args);
// Changing event handlers can coerce the value. Return coerced value to caller.
newValue = args.CoercedValue;
args.Recycle();
}
}
/// <summary>
/// Updates the value of the game property.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="eventArgs">
/// The <see cref="GamePropertyEventArgs{T}"/> instance containing the event data.
/// </param>
public void Change(object sender, GamePropertyEventArgs <T> eventArgs)
{
_gameProperty.Value = eventArgs.NewValue;
}
private void OnExpandedChanged(object sender, GamePropertyEventArgs<bool> eventArgs)
{
// Toggle the visibility of all child Items.
foreach (var item in Items)
item.IsVisible = eventArgs.NewValue;
}