source: branches/eraser6/Eraser/TaskDataSelectionForm.cs @ 231

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

using Eraser.Manager;
using Eraser.Util;

namespace Eraser
{
    public partial class TaskDataSelectionForm : Form
    {
        private class DriveItem
        {
            public override string ToString()
            {
                return Label;
            }

            public string Drive;
            public string Label;
            public Icon Icon;
        }

        public TaskDataSelectionForm()
        {
            //Create the UI
            InitializeComponent();
            file.Checked = true;

            //Populate the drives list
            string[] drives = Environment.GetLogicalDrives();
            foreach (string drive in drives)
            {
                DriveTypes driveType = Drives.GetDriveType(drive);
                if (driveType != DriveTypes.DRIVE_UNKNOWN &&
                    driveType != DriveTypes.DRIVE_NO_ROOT_DIR &&
                    driveType != DriveTypes.DRIVE_CDROM &&
                    driveType != DriveTypes.DRIVE_REMOTE)
                {
                    DriveItem item = new DriveItem();
                    item.Drive = drive.Substring(0, drive.Length - 1);
                    item.Label = File.GetFileDescription(item.Drive);
                    item.Icon = File.GetFileIcon(item.Drive);
                    unusedDisk.Items.Add(item);
                }
            }

            if (unusedDisk.Items.Count != 0)
                unusedDisk.SelectedIndex = 0;

            //And the methods list
            Dictionary<Guid, ErasureMethod> methods = ErasureMethodManager.GetAll();
            this.method.Items.Add(ErasureMethodManager.Default);
            foreach (ErasureMethod method in methods.Values)
                this.method.Items.Add(method);
            if (this.method.Items.Count != 0)
                this.method.SelectedIndex = 0;
        }

        /// <summary>
        /// Retrieves the settings on the property page as the Eraser Manager API equivalent.
        /// </summary>
        /// <returns>An Eraser.Manager.Task.Data or Eraser.Manager.Task.UnusedSpace object
        /// or any of its inherited classes, depending on the task selected</returns>
        public Task.ErasureTarget Target
        {
            get
            {
                Task.ErasureTarget result = null;
                if (file.Checked)
                {
                    Manager.Task.File fileTask = new Task.File();
                    result = fileTask;

                    fileTask.Path = filePath.Text;
                }
                else if (folder.Checked)
                {
                    Manager.Task.Folder folderTask = new Task.Folder();
                    result = folderTask;

                    folderTask.Path = folderPath.Text;
                    folderTask.IncludeMask = folderInclude.Text;
                    folderTask.ExcludeMask = folderExclude.Text;
                    folderTask.DeleteIfEmpty = folderDelete.Checked;
                }
                else
                {
                    Task.UnusedSpace unusedSpaceTask = new Task.UnusedSpace();
                    result = unusedSpaceTask;

                    unusedSpaceTask.Drive = ((DriveItem)unusedDisk.SelectedItem).Drive;
                }

                result.Method = (ErasureMethod)this.method.SelectedItem;
                return result;
            }
            set
            {
                //Set the erasure method.
                foreach (object item in method.Items)
                    if (item == value.Method)
                        method.SelectedItem = item;

                //Then the data to be erased.
                if (value is Task.File)
                {
                    filePath.Text = ((Task.File)value).Path;
                }
                else if (value is Task.Folder)
                {
                    Manager.Task.Folder folderTask = (Task.Folder)value;

                    folderPath.Text = folderTask.Path;
                    folderInclude.Text = folderTask.IncludeMask;
                    folderExclude.Text = folderTask.ExcludeMask;
                    folderDelete.Checked = folderTask.DeleteIfEmpty;
                }
                else if (value is Task.UnusedSpace)
                {
                    Task.UnusedSpace unusedSpaceTask = new Task.UnusedSpace();
                    foreach (object item in unusedDisk.Items)
                        if (((DriveItem)item).Drive == ((Task.UnusedSpace)value).Drive)
                            unusedDisk.SelectedItem = item;
                }
                else
                    throw new NotImplementedException("Unknown erasure target.");
            }
        }

        private void data_CheckedChanged(object sender, EventArgs e)
        {
            filePath.Enabled = fileBrowse.Enabled = file.Checked;
            folderPath.Enabled = folderBrowse.Enabled = folderIncludeLbl.Enabled =
                folderInclude.Enabled = folderExcludeLbl.Enabled = folderExclude.Enabled =
                folderDelete.Enabled = folder.Checked;
            unusedDisk.Enabled = unused.Checked;
            errorProvider.Clear();
        }

        private void fileBrowse_Click(object sender, EventArgs e)
        {
            fileDialog.FileName = filePath.Text;
            if (fileDialog.ShowDialog() == DialogResult.OK)
                filePath.Text = fileDialog.FileName;
        }

        private void folderBrowse_Click(object sender, EventArgs e)
        {
            folderDialog.SelectedPath = folderPath.Text;
            if (folderDialog.ShowDialog() == DialogResult.OK)
                folderPath.Text = folderDialog.SelectedPath;
        }

        private void unusedDisk_DrawItem(object sender, DrawItemEventArgs e)
        {
            if (e.Index == -1)
                return;

            Graphics g = e.Graphics;
            DriveItem item = (DriveItem)unusedDisk.Items[e.Index];
            Color textColour = e.ForeColor;
            PointF textPos = e.Bounds.Location;
            textPos.X += item.Icon.Width + 4;
            textPos.Y += 2;

            //Set the text colour and background colour if the control is disabled
            if ((e.State & DrawItemState.Disabled) == 0)
                e.DrawBackground();
            else
            {
                g.FillRectangle(new SolidBrush(SystemColors.ButtonFace), e.Bounds);
                textColour = SystemColors.GrayText;
            }

            g.DrawIcon(item.Icon, e.Bounds.X + 2, e.Bounds.Y);
            g.DrawString(item.Label, e.Font, new SolidBrush(textColour), textPos);
            if ((e.State & DrawItemState.Focus) != 0)
                e.DrawFocusRectangle();
        }

        private void ok_Click(object sender, EventArgs e)
        {
            if (file.Checked && filePath.Text.Length == 0)
                errorProvider.SetError(filePath, "Invalid file path");
            else if (folder.Checked && folderPath.Text.Length == 0)
                errorProvider.SetError(folderPath, "Invalid folder path");
            else
            {
                errorProvider.Clear();
                DialogResult = DialogResult.OK;
                Close();
            }
        }
    }
}