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

namespace OmaTextBox
{
    public partial class OmaTextBox : TextBox
    {
        private int pAlaraja = 0;

        [Category("Tekstilootat"),
        Description("Tarkistaa, että syötetty luku on määrättyä alarajaa korkeampi"),
        DefaultValue(0),
        Browsable(true)]
        public int Alaraja
        {
            get { return pAlaraja; }
            set { pAlaraja = value; }
        }
        public delegate void NegativeNumberHandler();
        public event NegativeNumberHandler NegativeNumber; 

        public OmaTextBox()
        {
            InitializeComponent();
        }

        protected override void OnTextChanged(
           EventArgs e)
        {
            double luku = 0;
            if (  Double.TryParse(Text, out luku) ) {
                if (luku < pAlaraja) { if ( NegativeNumber != null ) NegativeNumber(); }
            }
            base.OnTextChanged(e);
        }

    }
}