如何在C＃中，我们可以写在Linux中实现PanelAppletGnome桌面

public override string IID {

	get { 

		return "OAFIID:appletWeather";

	    }

	}



public override string FactoryIID {

			get { 

				return "OAFIID:appletWeather_Factory"; 

			}

		}

 

protected override bool OnButtonPressEvent (EventButton evnt)

{

//see http://www.go-mono.com/docs/index.aspx?link=P%3AGdk.EventButton.Time

			//1 - left

			//2 - middle

			//3 - right

	if(evnt.Button == 1)

	{

		if(w!=null)

		

w.Destroy();

		w = new MyWindow();

	}

			

	return base.OnButtonPressEvent (evnt);

}

	

PanelAppletFactory.Register(typeof (PanelAppletClass));

<currentweather>

  <location>Minsk, Belarus (UMMS) 53-56N 027-38E 231M</location>

  <time>Mar 04, 2010 - 08:00 AM EST / 2010.03.04 1300 UTC</time>

  <wind> from the SW (230 degrees) at 9 MPH (8 KT) gusting to 16 MPH (14 KT) (direction variable):0</wind>

  <visibility> greater than 7 mile(s):0</visibility>

  <skyconditions> mostly cloudy</skyconditions>

  <temperature> 30 F (-1 C)</temperature>

  <wind>Windchill: 21 F (-6 C):1</wind>

  <dewpoint> 17 F (-8 C)</dewpoint>

  <relativehumidity> 58%</relativehumidity>

  <pressure> 29.80 in. Hg (1009 hPa)</pressure>

  <status>Success</status>

</currentweather>

public static CurrentWeather Create(string xml)

		{

			 if (String.IsNullOrEmpty(xml))

                return new CurrentWeather();

                        

            try

            {

                XmlSerializer sr = new XmlSerializer(typeof(CurrentWeather));

                MemoryStream memoryStream = new MemoryStream(Encoding.UTF8.GetBytes(xml));

                               

                return (CurrentWeather)sr.Deserialize(memoryStream);

            }

            catch

            {

                return new CurrentWeather();

            }

		}

public static CurrentWeather GetWeather(string country, string city)

		{

			string xml = service.GetWeather(city, country);

			XElement root = XElement.Parse(xml);

			

			return CurrentWeather.Create(root.ToString());

		}

private  static GlobalWeather service = new GlobalWeather();

		private static Dictionary<string, IEnumerable<string>> 

			citiesOfcountry = new Dictionary<string, IEnumerable<string>>();

			

		public static IEnumerable<string> GetCitiesByCountry(string country)

		{

			if(!citiesOfcountry.ContainsKey(country))

			{

				string xml = service.GetCitiesByCountry(country);

				

				XElement root = XElement.Parse(xml);

				

				IList<string> cities = new List<string>();

				

				citiesOfcountry.Add(country, 

					    (from city in root.Elements()

				         orderby city.Element("City").Value

						 select city.Element("City").Value));

			}

			

			return citiesOfcountry[country];

		}

public class MyWindow:Window

	{

		private Label lblLocation = new Label();

		private Label lblTime = new Label();

		private Label lblWind = new Label();

		private Label lblVisibility = new Label();

		private Label lblSkyConditions = new Label();

		private Label lblTemperature = new Label();

		private Label lblDewPoint = new Label();

		private Label lblRelativeHumidity = new Label();

		private Label lblPressure = new Label();		

		public MyWindow():base("Center")

		{

			CreateControls();

        			ShowAll();

		}

		...

}

		private void CreateControls()

		{

			SetDefaultSize(400, 200);

			

			Fixed fix = new Fixed();

			

			fix.Put(new Label("Location"), 10, 10 );

			fix.Put(lblLocation, 180, 10 );	

			fix.Put(new Label("Pressure"), 10, 170 );

			fix.Put(lblPressure, 180, 170 );

			...

			this.Add(fix);

		}

ScrolledWindow sw = new Gtk.ScrolledWindow ();

Gtk.TreeView tree = new Gtk.TreeView ();

filterEntry = new Gtk.Label ();

Gtk.VBox box = new Gtk.VBox ();

box.PackStart(filterBox, false, false, 5);

sw.Add (tree);

box.PackStart(sw, true, true, 5);

	

Gtk.TreeViewColumn countriesColumn = new Gtk.TreeViewColumn ();

countriesColumn.Title = "Countries";

Gtk.CellRendererText countriesNameCell = new Gtk.CellRendererText ();

countriesColumn.PackStart (countriesNameCell, true);

tree.AppendColumn (countriesColumn);

countriesColumn.AddAttribute(countriesNameCell, "text", 0);

tree.Selection.Changed += OnSelectionChanged; 	

tree.Model = BuildTree();

private TreeStore BuildTree()

		{

			Gtk.TreeStore countryListStore = new Gtk.TreeStore(typeof (string));

			

			Gtk.TreeIter europe = countryListStore.AppendValues ("Europe");

		

			SetCountryCities("Belarus", europe, ref countryListStore);

			SetCountryCities("Russia", europe, ref countryListStore);

						

			return countryListStore;

		}

private void SetCountryCities(string country,TreeIter region, ref TreeStore store)

		{

			TreeIter countryIter = store.AppendNode(region);

			store.SetValue(countryIter,0, country);

		

			foreach(var city in WeatherService.GetCitiesByCountry(country))

				store.AppendValues (countryIter, city);

			

		}

void OnSelectionChanged (object o, EventArgs args)

        {

                TreeIter iter;

                TreeModel model;

 

                if (((TreeSelection)o).GetSelected (out model, out iter))

                {

					if(model.IterHasChild(iter)) return;

						

						TreeIter parent;

						model.IterParent(out parent, iter);

					

						string state = (string) model.GetValue (parent, 0);

                        string city = (string) model.GetValue (iter, 0);

						filterEntry.Text = String.Format("{0}-{1} was selected", state, city);

						

						SettingsStore.Set("state", state);

						SettingsStore.Set("city", city);

                }

        }

using GConf;



public static class SettingsStore

	{

		//path in gconf-editor

		private const string APPLICATION_KEY = "/apps/appletweather/";

		//gconf object

		private static Client client = new Client();



		//set value

		public static void Set(string key, object val)

		{

			client.Set(APPLICATION_KEY+key, val);

		}

		

		//get value

		public static object Get(string key)

		{

			return client.Get(APPLICATION_KEY+key);

		}

	}