Add progress tracking for chart loading.

Assets/Cryville/Crtr/StateBase.cs

@@ -13,7 +13,11 @@ namespace Cryville.Crtr {
 		/// <summary>
 		/// The index of the event to be handled next.
 		/// </summary>
-		protected int EventId;
+		public int EventId { get; protected set; }
+		/// <summary>
+		/// The event count.
+		/// </summary>
+		public int EventCount { get { return Events.Count; } }
 		/// <summary>
 		/// The event list.
 		/// </summary>
@@ -66,6 +70,13 @@ namespace Cryville.Crtr {
 			ForwardToTime(double.PositiveInfinity);
 		}
 
+		/// <summary>
+		/// Forwards to the next event.
+		/// </summary>
+		public void ForwardOnce() {
+			ForwardOnceToTime(double.PositiveInfinity);
+		}
+
 		/// <summary>
 		/// Forwards the time by the specified span and walks through all the encountered events.
 		/// </summary>