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 Assessment5A
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            //On initialization of the form, the following code will execute, and create three columns
            //The below line of code adds the headers to each column respectively
            lstChart.Items.Add("F" + "\t" + "C" + "\t" + "K");
            double y;
            double z;
            //Loops code to fill in all three columns with the correct temperature calculations, rounding to one decimal place when outputted
            for (double x = 32.0; x <= 212.0; x++)
            {
             y = (x - 32) * 5 / 9;
             z = (y + 273);
            lstChart.Items.Add((x.ToString()) + "\t" + (y.ToString("n1")) + "\t" + (z.ToString("n1")));
        }
            }
        private void btnExit_Click(object sender, EventArgs e)
            //Closes the application when the Exit button is clicked by the user
        {
            this.Close();
        }

        private void btnCalc_Click(object sender, EventArgs e)
        {
            //When a value is entered, the program will calculate the Celsius and Kelvin conversions below, and display them
            double userIn;
            double celCon;
            double kelCon;
            if (double.TryParse(txtUser.Text, out userIn))
            {
                celCon = (userIn - 32) * 5 / 9;
                kelCon = celCon + 273;
                lblOutCel.Text = (celCon.ToString("n1"));
                lblOutKel.Text = (kelCon.ToString("n1"));
            }
            else
            {
                //If the user does not enter a valid number(double) value, as the code cannot parse it, will display below message and prompt a
                //different input; Data Validation
                MessageBox.Show("Please enter a valid number!");
                txtUser.Text = "";
                txtUser.Focus();
            }
        }

        private void btnReset_Click(object sender, EventArgs e)
        {
            //Resets all fields to clear
            txtUser.Text = "";
            txtUser.Focus();
            lblOutKel.Text = "";
            lblOutCel.Text = "";
        }
    }
}