/// <summary>
/// Fades a <see cref="Canvas"/> asynchronously.
/// </summary>
/// <param name="from">The start value of the <see cref="Canvas"/>'s alpha.</param>
/// <param name="to">The end value of the <see cref="Canvas"/>'s alpha.</param>
/// <param name="duration">The duration of the fade, in seconds.</param>
/// <returns>The awaitable task.</returns>
private async UniTask FadeAsync(float from, float to, float duration)
{
await UniTaskExtensions.ProgressAsync(SetAlpha, from, to, duration, _cancellationTokenSource.Token);
void SetAlpha(float alpha) => _canvasGroup.alpha = alpha;
}
/// <summary>
/// Fades the announcement board in asynchronously.
/// </summary>
/// <param name="duration">The duration of the fade, in seconds.</param>
/// <param name="token">The token for operation cancellation.</param>
/// <returns>The awaitable task.</returns>
private async UniTask FadeInAsync(float duration, CancellationToken token)
{
await UniTaskExtensions.ProgressAsync(SetAlpha, 0f, 1f, duration, token);
}