source: trunk/eraser6/Eraser/ProgressForm.cs @ 1360

/* 
 * $Id$
 * Copyright 2008-2009 The Eraser Project
 * Original Author: Joel Low <lowjoel@users.sourceforge.net>
 * Modified By:
 * 
 * This file is part of Eraser.
 * 
 * Eraser is free software: you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 * 
 * Eraser is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 * 
 * A copy of the GNU General Public License can be found at
 * <http://www.gnu.org/licenses/>.
 */

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;
using System.Globalization;

namespace Eraser
{
    public partial class ProgressForm : Form
    {
        private Task task;
        private DateTime lastUpdate;

        public ProgressForm(Task task)
        {
            InitializeComponent();
            UXThemeApi.UpdateControlTheme(this);
            this.task = task;
            this.lastUpdate = DateTime.Now;
            this.ActiveControl = hide;

            //Register the event handlers
            jobTitle.Text = task.UIText;
            task.ProgressChanged += task_ProgressChanged;
            task.TaskFinished += task_TaskFinished;
        }

        private void ProgressForm_FormClosed(object sender, FormClosedEventArgs e)
        {
            task.ProgressChanged -= task_ProgressChanged;
            task.TaskFinished -= task_TaskFinished;
        }

        private void task_ProgressChanged(object sender, TaskProgressEventArgs e)
        {
            if (InvokeRequired)
            {
                //Don't update too often - we can slow down the code.
                if (DateTime.Now - lastUpdate < new TimeSpan(0, 0, 0, 0, 300))
                    return;

                lastUpdate = DateTime.Now;
                Invoke(new EventHandler<TaskProgressEventArgs>(task_ProgressChanged), sender, e);
                return;
            }

            status.Text = e.CurrentTargetStatus;
            item.Text = WrapItemName(e.CurrentItemName);
            pass.Text = e.CurrentTargetTotalPasses != 0 ?
                S._("{0} out of {1}", e.CurrentItemPass, e.CurrentTargetTotalPasses) :
                e.CurrentItemPass.ToString(CultureInfo.CurrentCulture);

            if (e.TimeLeft >= TimeSpan.Zero)
                timeLeft.Text = S._("About {0:T} left", e.TimeLeft);
            else
                timeLeft.Text = S._("Unknown");

            if (e.CurrentItemProgress >= 0.0f)
            {
                itemProgress.Style = ProgressBarStyle.Continuous;
                itemProgress.Value = (int)(e.CurrentItemProgress * 1000);
                itemProgressLbl.Text = e.CurrentItemProgress.ToString("#0%",
                    CultureInfo.CurrentCulture);
            }
            else
            {
                itemProgress.Style = ProgressBarStyle.Marquee;
                itemProgressLbl.Text = string.Empty;
            }

            overallProgress.Value = (int)(e.OverallProgress * 1000);
            overallProgressLbl.Text = S._("Total: {0,2:#0.00%}", e.OverallProgress);
        }

        private void task_TaskFinished(object sender, TaskEventArgs e)
        {
            if (InvokeRequired)
            {
                Invoke(new EventHandler<TaskEventArgs>(task_TaskFinished), sender, e);
                return;
            }

            //Update the UI. Set everything to 100%
            timeLeft.Text = item.Text = pass.Text = string.Empty;
            overallProgressLbl.Text = S._("Total: {0,2:#0.00%}", 1.0);
            overallProgress.Value = overallProgress.Maximum;
            itemProgressLbl.Text = "100%";
            itemProgress.Style = ProgressBarStyle.Continuous;
            itemProgress.Value = itemProgress.Maximum;

            //Inform the user on the status of the task.
            LogLevel highestLevel = LogLevel.Information;
            LogEntryCollection entries = e.Task.Log.LastSessionEntries;
            foreach (LogEntry log in entries)
                if (log.Level > highestLevel)
                    highestLevel = log.Level;

            switch (highestLevel)
            {
                case LogLevel.Warning:
                    status.Text = S._("Completed with warnings");
                    break;
                case LogLevel.Error:
                    status.Text = S._("Completed with errors");
                    break;
                case LogLevel.Fatal:
                    status.Text = S._("Not completed");
                    break;
                default:
                    status.Text = S._("Completed");
                    break;
            }

            //Change the Stop button to be a Close button and the Hide button
            //to be disabled
            hide.Enabled = false;
            stop.Text = S._("Close");
        }

        private void hide_Click(object sender, EventArgs e)
        {
            Close();
        }

        private void stop_Click(object sender, EventArgs e)
        {
            if (task.Executing)
                task.Cancel();
            Close();
        }

        private string WrapItemName(string itemName)
        {
            StringBuilder result = new StringBuilder(itemName.Length);

            try
            {
                using (Graphics g = item.CreateGraphics())
                {
                    //Split the long file name into lines which fit into the width of the label
                    while (itemName.Length > 0)
                    {
                        int chars = 0;
                        int lines = 0;
                        g.MeasureString(itemName, item.Font, new SizeF(item.Width - 2, 15),
                            StringFormat.GenericDefault, out chars, out lines);

                        result.AppendLine(itemName.Substring(0, chars));
                        itemName = itemName.Remove(0, chars);
                    }
                }
            }
            catch (ObjectDisposedException)
            {
                //Called when the user closes the form and the delegate call to Invoke was queued.
            }

            return result.ToString();
        }
    }
}