Crypto-Notepad/EncryptPad/SettingsForm.cs

using Microsoft.Win32;
using System;
using System.Drawing;
using System.IO;
using System.Reflection;
using System.Windows.Forms;

namespace EncryptPad
{
    public partial class SettingsForm : Form
    {

        Properties.Settings ps = Properties.Settings.Default;
        MainWindow ma = new MainWindow();

        public SettingsForm()
        {
            InitializeComponent();
        }

        private void SettingsForm_Load(object sender, EventArgs e)
        {
            foreach (FontFamily fonts in FontFamily.Families)
            {
                comboBox1.Items.Add(fonts.Name);
            }

            comboBox1.Text = ps.RichTextFont;
            comboBox2.Text = ps.RichTextSize.ToString();
            comboBox4.Text = ps.HashAlgorithm;
            comboBox3.Text = ps.KeySize.ToString();
            textBox1.Text = ps.TheSalt;
            textBox2.Text = ps.PasswordIterations.ToString();
            checkBox1.Checked = ps.AssociateCheck;

            panel1.BackColor = ps.RichForeColor;
            panel2.BackColor = ps.RichBackColor;
            panel3.BackColor = ps.HighlightsColor;
        }

        private void saveSettingsButton_Click(object sender, EventArgs e)
        {
            if (checkBox1.Checked == true)
            {
                AssociateExtension(Assembly.GetEntryAssembly().Location, "enp");
            }

            if (checkBox1.Checked == false)
            {
                DissociateExtension(Assembly.GetEntryAssembly().Location, "enp");
            }

            ps.RichForeColor = panel1.BackColor;
            ps.RichBackColor = panel2.BackColor;
            ps.HighlightsColor = panel3.BackColor;
            ps.RichTextFont = comboBox1.Text;
            ps.RichTextSize =  Convert.ToInt32(comboBox2.Text.ToString());
            ps.AssociateCheck = checkBox1.Checked;
            ps.HashAlgorithm = comboBox4.Text;
            ps.KeySize = Convert.ToInt32(comboBox3.Text.ToString());
            ps.TheSalt = textBox1.Text;
            ps.PasswordIterations = Convert.ToInt32(textBox2.Text.ToString());

            ps.Save();

            this.Hide();
        }

        public static void AssociateExtension(string applicationExecutablePath, string extension)
        {          
            RegistryKey key = Registry.CurrentUser.OpenSubKey("Software\\Classes", true);
            key.CreateSubKey("." + extension).SetValue(string.Empty, extension + "_auto_file");
            key = key.CreateSubKey(extension + "_auto_file");
            key.CreateSubKey("DefaultIcon").SetValue(string.Empty, Path.GetDirectoryName(Application.ExecutablePath) + "\\EncryptPad.exe" + ",0");
            key = key.CreateSubKey("Shell");
            key.SetValue(string.Empty, "Open");
            key = key.CreateSubKey("Open");
            key.CreateSubKey("Command").SetValue(string.Empty, "\"" + applicationExecutablePath + "\" \"%1\"");
            key.CreateSubKey("ddeexec\\Topic").SetValue(string.Empty, "System");
        }

        public static void DissociateExtension(string applicationExecutablePath, string extension)
        {
            RegistryKey key = Registry.CurrentUser.OpenSubKey("Software\\Classes", true);
            key.DeleteSubKeyTree(extension + "_auto_file");
            key.DeleteSubKeyTree("." + extension);
        }

        private void panel1_Click_1(object sender, EventArgs e)
        {
            colorDialog1.Color = panel1.BackColor;
            MessageBoxCenter.PrepToCenterMessageBoxOnForm(this);
            colorDialog1.ShowDialog();
            panel1.BackColor = colorDialog1.Color;
        }

        private void panel2_Click(object sender, EventArgs e)
        {
            colorDialog1.Color = panel2.BackColor;
            MessageBoxCenter.PrepToCenterMessageBoxOnForm(this);
            colorDialog1.ShowDialog();
            panel2.BackColor = colorDialog1.Color;
        }

        private void panel3_Click(object sender, EventArgs e)
        {
            colorDialog1.Color = panel3.BackColor;
            MessageBoxCenter.PrepToCenterMessageBoxOnForm(this);
            colorDialog1.ShowDialog();
            panel3.BackColor = colorDialog1.Color;
        }
    }
}