ChatPage.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 System.Diagnostics;
using System.Text;

using Gtk;
using Glade;
using Mono.Unix;

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

namespace DCSharp.GUI{
  public class ChatPage : Page
  {
    [Widget]
    private ChatView chatView;
    
    [Widget]
    private Entry messageEntry;
    
    #region Constructors
    
    public ChatPage(LocalIdentity localIdentity, Identity remoteIdentity) :
      base("ChatPage.glade")
    {
      if (localIdentity == null)
      {
        throw new ArgumentNullException("localIdentity");
      }
      if (remoteIdentity == null)
      {
        throw new ArgumentNullException("remoteIdentity");
      }
      
      this.localIdentity = localIdentity;
      this.remoteIdentity = remoteIdentity;
      
      chatView.Show();
      
      messageEntry.GrabFocus();
      messageEntry.Activated += OnMessageEntryActivated;
      
      // Events
      remoteIdentity.User.OnlineChanged += OnOnlineChanged;
    }
    
    #endregion
    
    #region Properties
    
    public override string Title
    {
      get { return remoteIdentity.Nick; }
    }
    
    public override Gdk.Pixbuf Icon
    {
      get { return Util.GetUserIcon(remoteIdentity); }
    }
    
    public override string Tooltip
    {
      get { return remoteIdentity.Nick; }
    }
    
    public Identity LocalIdentity
    {
      get { return localIdentity; }
    }
    private Identity localIdentity;
    
    public Identity RemoteIdentity
    {
      get { return remoteIdentity; }
    }
    private Identity remoteIdentity;
    
    #endregion
    
    #region Methods
    
    public override void Dispose()
    {
      remoteIdentity.User.OnlineChanged -= OnOnlineChanged;
      base.Dispose();
    }
    
    public void DisplayMessage(User from, string message)
    {
      if (from == null)
      {
        throw new ArgumentNullException("from");
      }
      if (message == null)
      {
        throw new ArgumentNullException("message");
      }
      if (from != localIdentity.User && from != remoteIdentity.User)
      {
        throw new ArgumentException("from", "Unknown user.");
      }
      
      Identity identity = from == localIdentity.User ? localIdentity :
        remoteIdentity;
      
      chatView.InsertMessage(identity.Nick, message, identity == localIdentity);
      OnPageChanged();
    }
    
    private void DisplayStatus()
    {
      string status = remoteIdentity.User.IsOnline ?
        Catalog.GetString("{0} has come online") :
        Catalog.GetString("{0} went offline");
      
      status = String.Format(status, remoteIdentity.Nick);
      
      chatView.InsertStatus(status);
      Status = status;
    }
    
    private void OnMessageEntryActivated(object o, EventArgs args)
    {
      string message = messageEntry.Text.Trim();
      if (message.Length > 0)
      {
        messageEntry.Text = String.Empty;
        
        HubConnection hub = Runtime.HubManager.GetHubWithUser(remoteIdentity.User);
        if (hub != null)
        {
          hub.SendPrivateMessage(remoteIdentity, message);
        }
      }
    }
    
    private void OnOnlineChanged(object obj, EventArgs args)
    {
      Application.Invoke(delegate
      {
        DisplayStatus();
        OnPageChanged();
      });
    }
    
    #endregion
  }
}