ConnectionStatusbar.cs :  » Business-Application » DC » DCSharp » GUI » C# / CSharp Open Source

/*
 * Copyright (C) 2006 Eskil Bylund
 *
 * This program 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 2 of the License, or
 * (at your option) any later version.
 * 
 * This program 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.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

using System;
using System.Collections;

using Gtk;
using Mono.Unix;

using DCSharp.Backend.Connections;
using DCSharp.Backend.Managers;

namespace DCSharp.GUI{
  public class ConnectionStatusbar : Statusbar
  {
    private ConnectionManager connectionManager;
    
    private long totalDown;
    private long totalUp;
    
    private Label downLabel;
    private Label upLabel;
    private Tooltips tooltips;
    private EventBox eventBox;
    
    private uint timeout;
    
    public ConnectionStatusbar(ConnectionManager connectionManager) : base()
    {
      if (connectionManager == null)
      {
        throw new ArgumentNullException("connectionManager");
      }
      this.connectionManager = connectionManager;
      
      HasResizeGrip = false;
      
      tooltips = new Tooltips();
      
      // Hide existing label
      HideAll();
      
      // Statusbar
      Frame frame = new Frame();
      frame.ShadowType = (ShadowType)StyleGetProperty("shadow-type");
      Add(frame);
      
      eventBox = new EventBox();
      eventBox.AboveChild = true;
      eventBox.VisibleWindow = false;
      frame.Add(eventBox);
      
      Box mainBox = new HBox(false, 12);
      eventBox.Add(mainBox);
      
      Box box;
      downLabel = new Label();
      upLabel = new Label();
      
      box = new HBox(false, 4);
      box.PackStart(new Image(Stock.GoDown, IconSize.Menu), false, true, 0);
      box.PackStart(downLabel, false, true, 0);
      mainBox.Add(box);
      
      box = new HBox(false, 4);
      box.PackStart(new Image(Stock.GoUp, IconSize.Menu), false, true, 0);
      box.PackStart(upLabel, false, true, 0);
      mainBox.Add(box);
      
      frame.ShowAll();
      
      Update();
      
      // Events
      connectionManager.ConnectionAdded += OnConnectionAdded;
      connectionManager.ConnectionRemoved += OnConnectionRemoved;
    }
    
    #region Methods
    
    public override void Dispose()
    {
      connectionManager.ConnectionAdded -= OnConnectionAdded;
      connectionManager.ConnectionRemoved -= OnConnectionRemoved;
      
      if (timeout != 0)
      {
        GLib.Source.Remove(timeout);
        timeout = 0;
      }
      base.Dispose();
    }
    
    private bool Update()
    {
      int downloadCount = 0;
      int uploadCount = 0;
      double down = 0;
      double up = 0;
      
      long totalDown = this.totalDown;
      long totalUp = this.totalUp;
      
      lock (connectionManager.SyncRoot)
      {
        foreach (UserConnection connection in connectionManager)
        {
          if (connection.Downloading)
          {
            down += connection.Bps;
            downloadCount++;
          }
          else if (connection.Uploading)
          {
            up += connection.Bps;
            uploadCount++;
          }
          totalDown += connection.Monitor.BytesDownloaded;
          totalUp += connection.Monitor.BytesUploaded;
        }
      }
      
      // Labels
      downLabel.Text = String.Format("{0}/s", Util.FormatFileSize((long)down));
      upLabel.Text = String.Format("{0}/s", Util.FormatFileSize((long)up));
      
      if (totalDown > 0)
      {
        downLabel.Text += " - " + String.Format(Catalog.GetString("Total: {0}"),
          Util.FormatFileSize(totalDown));
      }
      if (totalUp > 0)
      {
        upLabel.Text += " - " + String.Format(Catalog.GetString("Total: {0}"),
          Util.FormatFileSize(totalUp));
      }
      
      // Tooltip
      string tooltip = String.Format(Catalog.GetPluralString(
        "{0} active download", "{0} active downloads", downloadCount),
        downloadCount);
      
      tooltip += ", ";
      
      tooltip += String.Format(Catalog.GetPluralString(
        "{0} active upload", "{0} active uploads", uploadCount),
        uploadCount);
      
      tooltips.SetTip(eventBox, tooltip, null);
      
      return true;
    }
    
    private void OnConnectionAdded(object obj, EventArgs args)
    {
      if (timeout == 0)
      {
        timeout = GLib.Timeout.Add(1000, Update);
      }
    }
    
    private void OnConnectionRemoved(object obj, ConnectionEventArgs args)
    {
      ConnectionMonitor monitor = ((UserConnection)args.Connection).Monitor;
      
      totalDown += monitor.BytesDownloaded;
      totalUp += monitor.BytesUploaded;
      
      if (connectionManager.Count == 0)
      {
        if (timeout != 0)
        {
          GLib.Source.Remove(timeout);
          timeout = 0;
        }
        
        Application.Invoke(delegate
        {
          Update();
        });
      }
    }
    
    #endregion
  }
}