Initial commit — AllMusicGuide scraper and music metadata tagger

UI/TrackQueryStatus.cs

@@ -0,0 +1,89 @@
+using System.ComponentModel;
+using MusicMetaTagger.Core.Model;
+using MusicMetaTagger.Core.Queries;
+
+namespace MusicMetaTagger.UI
+{
+	public class TrackQueryStatus : TrackQuery, INotifyPropertyChanged
+	{
+		private int _percentProgress;
+		private string _status;
+		
+		///<summary>
+		///  Occurs when a property value changes.
+		///</summary>
+		public event PropertyChangedEventHandler PropertyChanged;
+
+		/// <summary>
+		///   Gets or sets the status.
+		/// </summary>
+		/// <value>The status.</value>
+		public string Status
+		{
+			get { return _status; }
+			set
+			{
+				if (_status == null && value == null)
+				{
+					return;
+				}
+
+				if ((_status == null) || !_status.Equals(value))
+				{
+					_status = value + " <- " + _status;
+
+					SignalPropertyChanged("Status");
+				}
+			}
+		}
+
+		public void UpdateStatus(StatusEventArgs data)
+		{
+			Status = data.Status;
+		}
+
+		/// <summary>
+		///   Gets or sets the progress. 0 to 100.
+		/// </summary>
+		/// <value>The progress.</value>
+		public int PercentProgress
+		{
+			get { return _percentProgress; }
+			set { CheckPropertyChangedValueType("PercentProgress", ref _percentProgress, ref value); }
+		}
+
+		
+		/// <summary>
+		///   Checks if the property (propertyName) has been updated or changed.
+		/// </summary>
+		/// <param name = "propertyName">Name of the property.</param>
+		/// <param name = "oldValue">The old value.</param>
+		/// <param name = "newValue">The new value.</param>
+		/// <returns>True if the value was updated, false otherwise.</returns>
+		protected bool CheckPropertyChangedValueType<T>(string propertyName, ref T oldValue, ref T newValue) where T : struct
+		{
+			if (!oldValue.Equals(newValue))
+			{
+				oldValue = newValue;
+
+				SignalPropertyChanged(propertyName);
+
+				return true;
+			}
+
+			return false;
+		}
+
+		/// <summary>
+		///   Creates the event that a property has changed value
+		/// </summary>
+		/// <param name = "propertyName"></param>
+		protected void SignalPropertyChanged(string propertyName)
+		{
+			if (PropertyChanged != null)
+			{
+				PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
+			}
+		}
+	}
+}