@implements IDisposable

@* One tab of a DTabs: renders nothing itself; DTabs renders its Header as the tab button and its ChildContent as
   the panel while it is active. *@

@code {
	[CascadingParameter] DTabs Parent { get; set; }
	[Parameter] public RenderFragment Header { get; set; }
	[Parameter] public RenderFragment ChildContent { get; set; }
	[Parameter] public bool Disabled { get; set; }
	[Parameter] public string Class { get; set; }

	protected override void OnInitialized()
	{
		if (Parent is null)
			throw new InvalidOperationException($"{nameof(DTab)} must be inside a {nameof(DTabs)}.");
		Parent.Add(this);
	}

	public void Dispose() => Parent?.Remove(this);
}