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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 Vezba_21
{
    public partial class Form1 : Form
    {
        private Button[] buttons = new Button[26];

        public Form1()
        {
            InitializeComponent();
            CreateLetterButtons();
        }

        private void CreateLetterButtons()
        {
            int xLocation = 12;
            int yLocation = 12;

            int i = 0;

            for (char c = 'A'; c <= 'Z'; c++)
            {
                //Kreiranje button objekta
                Button button = new Button();
                //Podesavanje svojstava
                button.Location = new System.Drawing.Point(xLocation, yLocation);
                button.Name = "button" + c.ToString();
                button.Size = new Size(25, 25);
                button.Text = c.ToString();
                button.BackColor = Color.White;
                //Dodavanje hendlera
                button.Click += new System.EventHandler(button_Click);
                //Dodavanje kontrole u kolciju kontrola
                Controls.Add(button);

                buttons[i] = button;

                if (c == 'M')
                {
                    xLocation = -18;
                    yLocation = 40;
                }
                xLocation += 30;
            }

            xLocation = 12;

            for (int a = 0; a <= 9; a++)
            {
                //Kreiranje button objekta
                Button button = new Button();
                //Podesavanje svojstava
                button.Location = new System.Drawing.Point(xLocation, yLocation + 30);
                button.Name = "button" + a.ToString();
                button.Size = new Size(25, 25);
                button.Text = a.ToString();
                button.BackColor = Color.White;
                //Dodavanje hendlera
                button.Click += new System.EventHandler(button_Click);
                //Dodavanje kontrole u kolciju kontrola
                Controls.Add(button);

                buttons[i] = button;

                xLocation += 30;
            }
        }

        private void button_Click(object sender, EventArgs e)
        {
            Button button = (Button)sender;
            textBox1.Text += button.Text;
        }

        private void textBox1_KeyDown(object sender, KeyEventArgs e)
        {
            char c = (char)e.KeyValue;
            if(char.IsLetter(c))
            {
                foreach (Button button in buttons)
                {
                    if (c.ToString() == button.Text)
                    {
                        textBox1.Text += c;
                        button.BackColor = Color.BlueViolet;
                    }
                }
            }
        }



        private void textBox1_KeyUp_1(object sender, KeyEventArgs e)
        {
            char c = (char)e.KeyValue;
            if (char.IsLetter(c))
            {
                foreach (Button button in buttons)
                {
                    if (c.ToString() == button.Text)
                    {
                        textBox1.Text += c;
                        button.BackColor = Color.White;
                    }
                }
            }
        }
    }
}