Zhelovanov_Dmitrii_COP/KOP_Labs/TextBoxComponent.cs

using DocumentFormat.OpenXml.Drawing.Diagrams;
using KOP_Labs.Exceptions;
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;
using static System.Windows.Forms.VisualStyles.VisualStyleElement.Button;

namespace KOP_Labs
{
	public partial class TextBoxComponent : UserControl
	{

		public TextBoxComponent()
		{
			InitializeComponent();
			Error = string.Empty;
		}
		
		public string Error { get; private set; }

		public float? Value
		{
			get
			{
				if (checkBox1.Checked)
				{
					return null;
				}
				if (CheckValue())
				{
					return float.Parse(textBox.Text);
				}

				return null;
				
				
			}
			set
			{
				
			
				if (value == null)
				{
					checkBox1.Checked = true;
				}
				textBox.Text = value.ToString();
				

			}
		}
		private EventHandler checkChanged;
		public event EventHandler CheckChanged
		{
			add
			{
				checkChanged += value;
			}
			remove
			{
				checkChanged -= value;
			}
		}

		private void CheckBox_CheckedChanged(object sender, EventArgs e)
		{
			   Error = string.Empty;
			    if (checkBox1.Checked)
				{
					textBox.Enabled = false;
					textBox.Text = string.Empty;
				}
				else
				{
					textBox.Enabled = true;

				}
		        checkChanged?.Invoke(sender, e);
		}

		private EventHandler valueChanged;
		public event EventHandler ValueChanged
		{
			add
			{
				valueChanged += value;
			}
			remove
			{
				valueChanged -= value;
			}
		}
		
		public bool CheckValue()

		{
			Error = string.Empty;
			if (!checkBox1.Checked && (string.IsNullOrEmpty(textBox.Text)))
			{

				Error = "Пусто!";		
				return false;
				
			}
			if (!checkBox1.Checked && !float.TryParse(textBox.Text, out float floatValue))
			{

				Error = "Не тот тип!";
				
				return false;
			}
			
			return true;
			
		}
		private void TextBox_TextChanged(object sender, EventArgs e)
		{

			valueChanged?.Invoke(sender, e);
		}

		
	}
}