Crystal Image Toolkit: thumbnail image control and picture viewing.

using System;
using System.ComponentModel;
using System.IO;
using System.Windows.Forms;
using Attilan.Crystal.Controls;
using Attilan.Crystal.Tools;

namespace ComicShowControllerDemo
{
    public partial class PSPExportForm : Form
    {
        public string LastPSPTargetFolder = Environment.GetFolderPath(Environment.SpecialFolder.MyPictures);

        public CrystalComicShowController ComicController;

        private PSPUnpackWorker _unpackWorker = new PSPUnpackWorker();

        public PSPExportForm()
        {
            InitializeComponent();
        }

        private void btnSelect_Click(object sender, EventArgs e)
        {
            folderBrowserDialog1.SelectedPath = LastPSPTargetFolder;
            if (folderBrowserDialog1.ShowDialog(this) == DialogResult.OK)
            {
                tbExportFolder.Text = folderBrowserDialog1.SelectedPath;
                LastPSPTargetFolder = folderBrowserDialog1.SelectedPath;
            }
        }

        private void btnOK_Click(object sender, EventArgs e)
        {
            try
            {
                if (!string.IsNullOrEmpty(tbExportFolder.Text))
                {
                    if (!Directory.Exists(tbExportFolder.Text))
                    {
                        Directory.CreateDirectory(tbExportFolder.Text);
                    }
                }                
            }
            catch (Exception ex)
            {
                CrystalLogger.LogException("Export button in PSP form", ex);
                MessageBox.Show(this, ex.Message, "Director error");
                return;
            }

            LastPSPTargetFolder = tbExportFolder.Text;

            btnSelect.Enabled = false;
            btnOK.Enabled = false;
            tbExportFolder.Enabled = false;

            _unpackWorker.UnpackLocation = tbExportFolder.Text;
            _unpackWorker.Collector = ComicController.Collector;
            _unpackWorker.ProgressChanged += new ProgressChangedEventHandler(unpackWorker_ProgressChanged);
            _unpackWorker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(unpackWorker_RunWorkerCompleted);
            _unpackWorker.RunWorkerAsync();
        }

        void unpackWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            progressBar1.Value = progressBar1.Maximum;
            DialogResult = DialogResult.OK;
        }

        void unpackWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {
            try
            {
                progressBar1.Value = e.ProgressPercentage;
            }
            catch(Exception ex)
            {
                CrystalLogger.LogException("unpackWorker_ProgressChanged", ex);
            }
        }

        private void btnCancel_Click(object sender, EventArgs e)
        {
            if (_unpackWorker.IsBusy)
            {
                _unpackWorker.CancelAsync();
            }

            DialogResult = DialogResult.Cancel;
        }

        private void PSPExportForm_Load(object sender, EventArgs e)
        {
            tbExportFolder.Text = LastPSPTargetFolder;
        }
    }
}