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

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C# / C Sharp
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C# / CSharp Open Source » Business Application » DC 
DC » DCSharp » GUI » MainWindow.cs
/*
 * Copyright (C) 2006-2007 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.Diagnostics;

using Gtk;
using Glade;
using Mono.Unix;

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

namespace DCSharp.GUI{
  public class MainWindow : GladeWindow
  {
    private IFavoriteHubManager favoriteHubManager;
    
    private PageManager pageManager;
    
    private Page currentPage;
    private ActionGroup pageActions;
    private uint mergeId;
    
    private UIManager uim;
    private ActionGroup actionGroup;
    private Action closeAction;
    private ToggleAction toolbarVisibleAction;
    
    private Toolbar toolbar;
    private MenuToolButton hubToolButton;
    
    private uint timeout;
    
    private static Gdk.Cursor normalCursor = new Gdk.Cursor(Gdk.CursorType.LeftPtr);
    private static Gdk.Cursor workingCursor = new Gdk.Cursor(Gdk.CursorType.Watch);
    
    [Widget]
    private VBox mainBox;
    
    [Widget]
    private Box statusBox;
    
    [Widget]
    private Statusbar statusbar;
    
    [Widget]
    private ProgressBar progressBar;
    
    #region Constructors
    
    public MainWindow(ConnectionManager connectionManager,
      IFavoriteHubManager favoriteHubManager) : base("MainWindow.glade")
    {
      if (favoriteHubManager == null)
      {
        throw new ArgumentNullException("favoriteHubManager");
      }
      
      this.favoriteHubManager = favoriteHubManager;
      
      Window.Title = DCSharp.Extras.Util.AppName;
      
      ActionEntry[] entries = new ActionEntry[] {
        new ActionEntry("HubMenu", null, Catalog.GetString("_Share"), null, null, null),
        new ActionEntry("Hubs", Stock.Network, Catalog.GetString("_Hubs"), null,
          Catalog.GetString("Edit hubs"),
          OnHubs),
        new ActionEntry("Search", Stock.Find, Catalog.GetString("_Search..."), "<control>F",
          Catalog.GetString("Search for files"),
          OnSearch),
        new ActionEntry("Preferences", Stock.Preferences, Catalog.GetString("_Preferences"), null,
          Catalog.GetString("Edit the preferences"),
          OnPreferences),
        new ActionEntry("Close", Stock.Close, Catalog.GetString("_Close"), "<control>W",
          Catalog.GetString("Close the current tab"),
          OnClose),
        new ActionEntry("Quit", Stock.Quit, Catalog.GetString("_Quit"), "<control>Q",
          Catalog.GetString("Quit the program"),
          OnQuit),
        // FIXME: Replace "Current" with "Active"/"Pending".
        new ActionEntry("ViewMenu", null, Catalog.GetString("_View"), null, null, null),
        new ActionEntry("Downloads", Stock.GoDown, Catalog.GetString("_Downloads"), "<control>D",
          Catalog.GetString("Current downloads"),
          OnDownloads),
        new ActionEntry("Uploads", Stock.GoUp, Catalog.GetString("_Uploads"), null,
          Catalog.GetString("Current uploads"),
          OnUploads),
        new ActionEntry("VisibleColumns", null, Catalog.GetString("_Visible Columns..."), null,
          Catalog.GetString("Edit visible columns"),
          null),
        
        new ActionEntry("TabMenu", null, Catalog.GetString("_Tabs"), null, null, null),
        
        new ActionEntry("HelpMenu", null, Catalog.GetString("_Help"), null, null, null),
        new ActionEntry("About", Stock.About, Catalog.GetString("_About"), null,
          Catalog.GetString("About this program"),
          OnAbout)
      };
      
      ToggleActionEntry[] toggleEntries = new ToggleActionEntry[] {
        new ToggleActionEntry("ToggleToolbar", null, Catalog.GetString("_Toolbar"), null,
          Catalog.GetString("Show or hide the toolbar"),
          OnToggleToolbar, true),
        new ToggleActionEntry("Transfers", null, Catalog.GetString("_Active Transfers"), null,
          Catalog.GetString("Show or hide the active transfers view"),
          null, false)
      };
      
      actionGroup = new ActionGroup("MainWindowActions");
      actionGroup.Add(entries);
      actionGroup.Add(toggleEntries);
      
      uim = new UIManager();
      uim.AddWidget += OnWidgetAdd;
      uim.ConnectProxy += OnProxyConnect;
      uim.InsertActionGroup(actionGroup, 0); 
      uim.AddUiFromResource("MainWindow.ui");
      
      Window.AddAccelGroup(uim.AccelGroup);
      
      closeAction = actionGroup["Close"];
      toolbarVisibleAction = (ToggleAction)actionGroup["ToggleToolbar"];
      
      actionGroup["Transfers"].Sensitive = false;
      actionGroup["VisibleColumns"].Sensitive = false;
      closeAction.Sensitive = false;
      
      // Hub Toolbutton
      hubToolButton = new MenuToolButton(Stock.Ok);
      actionGroup["Hubs"].ConnectProxy(hubToolButton);
      
      hubToolButton.Menu = favoriteHubManager.HubCount != 0 ? new Menu() : null;
      hubToolButton.ShowMenu += delegate
      {
        UpdateFavoriteHubMenu(hubToolButton);
      };
      
      toolbar = (Toolbar)uim.GetWidget("/ToolBar");
      toolbar.Insert(hubToolButton, 0);
      
      // Page Manager
      pageManager = PageManager.Create();
      pageManager.CurrentPageChanged += OnCurrentPageChanged;
      pageManager.PageAdded += OnPageAdded;
      pageManager.PageRemoved += OnPageRemoved;
      
      pageManager.Show();
      mainBox.PackEnd(pageManager, true, true, 0);
      
      // Statusbar
      Box connectionStatus = new ConnectionStatusbar(connectionManager);
      connectionStatus.Show();
      statusBox.PackStart(connectionStatus, false, true, 0);
      
      // Events
      favoriteHubManager.HubAdded += OnFavoriteHubCountChanged;
      favoriteHubManager.HubRemoved += OnFavoriteHubCountChanged;
    }
    
    #endregion
    
    #region Properties
    
    public PageManager PageManager
    {
      get { return pageManager; }
    }
    
    public bool ToolbarVisible
    {
      get { return toolbarVisibleAction.Active; }
      set { toolbarVisibleAction.Active = value; }
    }
    
    protected bool IsWorking
    {
      get { return isWorking; }
      set
      {
        if (value != isWorking)
        {
          if (value)
          {
            Window.GdkWindow.Cursor = workingCursor;
            if (timeout == 0)
            {
              progressBar.Visible = true;
              timeout = GLib.Timeout.Add(10, OnProgressTimeout);
            }
          }
          else
          {
            Window.GdkWindow.Cursor = normalCursor;
            if (timeout != 0)
            {
              progressBar.Visible = false;
              GLib.Source.Remove(timeout);
              timeout = 0;
            }
          }
          isWorking = value;
        }
      }
    }
    private bool isWorking;
    
    #endregion
    
    #region Methods
    
    public override void Destroy()
    {
      favoriteHubManager.HubAdded -= OnFavoriteHubCountChanged;
      favoriteHubManager.HubRemoved -= OnFavoriteHubCountChanged;
      
      pageManager.Clear();
      base.Destroy();
    }
    
    private void UpdateFavoriteHubMenu(MenuToolButton button)
    {
      button.Menu = new Menu();
      
      foreach (FavoriteHubInfo hubInfo in favoriteHubManager.Hubs)
      {
        if (hubInfo.Name == null || hubInfo.Name.Length == 0)
        {
          continue;
        }
        
        FavoriteHubInfo hub = hubInfo;
        ImageMenuItem item = new ImageMenuItem(hub.Name);
        
        item.Image = new Image(Stock.Network, IconSize.Menu);
        
        if (hub.Hostname == null || hub.Hostname.Length == 0)
        {
          item.Sensitive = false;
        }
        
        item.Activated += delegate
        {
          HubConnection h = Runtime.ConnectToHub(hub);
          GUI.ShowHub(h, true);
        };
        
        item.Selected += delegate
        {
          string text = hub.Description;
          if(text != null && text.Length > 0 && hub.Hostname != null)
          {
            text += " - ";
          }
          text += hub.Hostname;
          
          statusbar.Push (1, text);
        };
        
        item.Deselected += delegate
        {
          statusbar.Pop (1);
        };
        
        ((Menu)button.Menu).Append(item);
      }
      
      button.Menu.ShowAll();
    }
    
    private void UpdateStatus()
    {
      if (currentPage == null)
      {
        IsWorking = false;
        statusbar.Pop(0);
        return;
      }
      
      statusbar.Pop(0);
      statusbar.Push(0, currentPage.Status != null ?
        currentPage.Status : String.Empty);
      
      IsWorking = currentPage.IsWorking;
    }
    
    private void OnWidgetAdd (object obj, AddWidgetArgs args)
    {
      args.Widget.Show();
      mainBox.PackStart(args.Widget, false, true, 0);
    }
    
    private void OnProxyConnect (object obj, ConnectProxyArgs args)
    {
      MenuItem item = args.Proxy as MenuItem;
      
      if (item != null)
      {
        Action action = args.Action;
        
        item.Selected += delegate
        {
          if (action.Tooltip != null)
          {
            statusbar.Push (1, action.Tooltip);
          }
        };
        
        item.Deselected += delegate
        {
          statusbar.Pop (1);
        };
      }
    }
    
    #region Page manager events
    
    private void OnCurrentPageChanged(object obj, PageEventArgs args)
    {
      if (currentPage != null)
      {
        currentPage.StatusChanged -= OnStatusChanged;
      }
      
      // Remove the UI from the previous page
      if (mergeId != 0)
      {
        uim.RemoveUi(mergeId);
        uim.EnsureUpdate();
        mergeId = 0;
      }
      if (pageActions != null)
      {
        uim.RemoveActionGroup(pageActions);
        pageActions = null;
      }
      
      Page page = args.Page;
      if (page != null)
      {
        page.StatusChanged += OnStatusChanged;
        
        // Add the UI for current page
        if (page.UI != null)
        {
          mergeId = uim.AddUiFromString(page.UI);
        }
        if (page.Actions != null)
        {
          pageActions = page.Actions;
          uim.InsertActionGroup(pageActions, 0);
        }
      }
      currentPage = page;
      UpdateStatus();
    }
    
    private void OnStatusChanged(object obj, EventArgs args)
    {
      UpdateStatus();
    }
    
    private void OnPageAdded(object obj, PageEventArgs args)
    {
      closeAction.Sensitive = pageManager.Count > 0;
    }
    
    private void OnPageRemoved(object obj, PageEventArgs args)
    {
      closeAction.Sensitive = pageManager.Count > 0;
    }
    
    #endregion
    
    private bool OnProgressTimeout()
    {
      progressBar.Pulse();
      return true;
    }
    
    #region Action handlers
    
    private void OnHubs(object obj, EventArgs args)
    {
      GUI.EditHubs();
    }
    
    private void OnSearch(object obj, EventArgs args)
    {
      GUI.ShowSearch(true);
    }
    
    private void OnPreferences(object obj, EventArgs args)
    {
      GUI.EditPreferences();
    }
    
    private void OnClose(object obj, EventArgs args)
    {
      if (pageManager.Current != null)
      {
        pageManager.Remove(pageManager.Current);
      }
    }
    
    private void OnQuit(object obj, EventArgs args)
    {
      Destroy();
    }
    
    private void OnDownloads(object obj, EventArgs args)
    {
      GUI.ShowDownloads(true);
    }
    
    private void OnUploads(object obj, EventArgs args)
    {
      GUI.ShowUploads(true);
    }
    
    private void OnToggleToolbar(object obj, EventArgs args)
    {
      ToggleAction toggleToolbar = (ToggleAction)obj;
      toolbar.Visible = toggleToolbar.Active;
    }
    
    private void OnAbout(object obj, EventArgs args)
    {
      AboutDialog about = new AboutDialog();
      
      about.TransientFor = Window;
      about.Run();
      about.Destroy();
    }
    
    #endregion
    
    private void OnFavoriteHubCountChanged(object obj,
      FavoriteHubEventArgs args)
    {
      Application.Invoke(delegate
      {
        hubToolButton.Menu = favoriteHubManager.HubCount != 0 ? new Menu() : null;
      });
    }
    
    #endregion
  }
}
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