using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace CustomComponents
{
	public partial class DropDownList : UserControl
	{
		public DropDownList()
		{
			InitializeComponent();
		}
		public void AddToList(string value)// 1 zadanie
		{
			if (value == null)
			{
				return;
			}
			ComboBox.Items.Add(value);
		}
		public void ClearList()
		{
			ComboBox.Items.Clear();
		}

		private void ComboBox_SelectedIndexChanged(object sender, EventArgs e)
		{
			_changeEvent?.Invoke(sender, e);

		}

		public string? Selected
		{
			get
			{
				if (ComboBox.Items.Count == 0 || ComboBox.SelectedItem == null)
				{
					return "";
				}
				return ComboBox.SelectedItem.ToString()!;
			}
			set
			{
				if (ComboBox.Items.Contains(value))
				{
					ComboBox.SelectedItem = value;
				}
			}
		}
		private EventHandler _changeEvent;
		public event EventHandler ChangeEvent
		{
			add
			{
				_changeEvent += value;
			}
			remove
			{
				_changeEvent -= value;
			}

		}
	}
}