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

/*
 * 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.Collections.Generic;

using Gtk;

namespace DCSharp.GUI{
  public class IconManager
  {
    private static Widget widget;
    private static Dictionary<string, Gdk.Pixbuf> iconCache;
    
    static IconManager()
    {
      widget = new Invisible();
      iconCache = new Dictionary<string, Gdk.Pixbuf>();
    }
    
    #region Properties
    
    private static Gdk.Pixbuf userOnline;
    
    public static Gdk.Pixbuf UserOnline
    {
      get
      {
        return userOnline;
      }
    }
    
    private static Gdk.Pixbuf userOffline;
    
    public static Gdk.Pixbuf UserOffline
    {
      get
      {
        return userOffline;
      }
    }
    
    private static Gdk.Pixbuf userPassive;
    
    public static Gdk.Pixbuf UserPassive
    {
      get
      {
        return userPassive;
      }
    }
    
    private static Gdk.Pixbuf userOp;
    
    public static Gdk.Pixbuf UserOp
    {
      get
      {
        return userOp;
      }
    }
    
    #endregion
    
    #region Methods
    
    public static void Init()
    {
      //Window.DefaultIcon = Gdk.Pixbuf.LoadFromResource("Logo.png");
      Window.DefaultIconName = "gtk-network";
      
      // Load icons
      string[] icons = {"user-online", "user-offline", "user-passive"};
      foreach (string icon in icons)
      {
        IconTheme.AddBuiltinIcon(icon, 16,
          Gdk.Pixbuf.LoadFromResource(icon + ".png"));
      }
      
      // Update
      UpdateIcons();
      IconTheme.Default.Changed += OnIconThemeChanged;
    }
    
    public static Gdk.Pixbuf GetIcon(string iconName, int size)
    {
      // The icons are cached because a new pixbuf might be created every
      // time an icon is loaded.
      string iconId = iconName + size;
      if (iconCache.ContainsKey(iconId))
      {
        return iconCache[iconId];
      }
      else
      {
        Gdk.Pixbuf pixbuf = null;
        if (IconTheme.Default.HasIcon(iconName))
        {
           pixbuf = IconTheme.Default.LoadIcon(iconName, size,
             IconLookupFlags.UseBuiltin);
        }
        iconCache.Add(iconId, pixbuf);
        return pixbuf;
      }
    }
    
    private static void UpdateIcons()
    {
      userOnline = GetIcon("user-online", 16);
      userOffline = GetIcon("user-offline", 16);
      userPassive = GetIcon("user-passive", 16);
      userOp = widget.RenderIcon(Stock.Help, IconSize.Menu, String.Empty);
    }
    
    private static void OnIconThemeChanged(object obj, EventArgs args)
    {
      iconCache.Clear();
      UpdateIcons();
    }
    
    #endregion
  }
}