Delay WarframeProcessFinder timer start until after initialization is…

… done, add standardized way to register a post-initialization callback on Main (#330)

WFInfo/Main.cs

@@ -48,6 +48,9 @@ class Main
         public static PlusOne plusOne = new PlusOne();
         public static System.Threading.Timer timer;
         public static System.Drawing.Point lastClick;
+
+        public static bool Initialized;
+        private static event EventHandler onInitialized;
         private const int minutesTillAfk = 7;
 
         private static bool UserAway { get; set; }
@@ -529,10 +532,35 @@ public void LoggedIn()
             }, null, startTimeSpan, periodTimeSpan);
         }
 
+        /// <summary>
+        /// Register a callback to be ran once initialization (including data load) is complete. 
+        /// If initialization is already done, callback gets invoked immediately
+        /// The callback is always ran on the GUI thread
+        /// </summary>
+        /// <param name="onLoading">The callback</param>
+        public static void RegisterOnFinishedLoading(EventHandler onLoading)
+        {
+            System.Windows.Application.Current.Dispatcher.InvokeAsync(() =>
+            {
+                if (Initialized)
+                {
+                    onLoading(null, EventArgs.Empty);
+                }
+                else
+                {
+                    onInitialized += onLoading;
+                }
+            });
+        }
+
 
         public static void FinishedLoading()
         {
-            MainWindow.INSTANCE.Dispatcher.Invoke(() => { MainWindow.INSTANCE.FinishedLoading(); });
+            System.Windows.Application.Current.Dispatcher.Invoke(() => 
+            { 
+                Initialized = true;
+                onInitialized?.Invoke(null, EventArgs.Empty);
+            });
         }
         public static void UpdateMarketStatus(string msg)
         {

WFInfo/MainWindow.xaml.cs

@@ -71,6 +71,7 @@ public MainWindow()
             }
 
             Application.Current.MainWindow = this;
+            Main.RegisterOnFinishedLoading(FinishedLoading);
         }
 
 
@@ -354,7 +355,7 @@ internal void LoggOut(object sender, CancelEventArgs e)
             Task.Factory.StartNew(() => { Main.dataBase.Disconnect(); });
         }
 
-        internal void FinishedLoading()
+        internal void FinishedLoading(object sender, EventArgs e)
         {
             Login.IsEnabled = true;
         }

WFInfo/Services/WarframeProcess/WarframeProcessFinder.cs

@@ -3,7 +3,7 @@
 using System.Runtime.InteropServices;
 using System.Threading.Tasks;
 using WFInfo.Settings;
-using System.Windows.Threading;
+using System.Threading;
 
 namespace WFInfo.Services.WarframeProcess
 {
@@ -67,12 +67,21 @@ private set
         private Process _warframe;
 
         private readonly IReadOnlyApplicationSettings _settings;
-        private System.Threading.Timer find_process_timer;
+        private Timer find_process_timer;
+        private const int FindProcessTimerDuration = 40000; // ms
 
         public WarframeProcessFinder(IReadOnlyApplicationSettings settings)
         {
             _settings = settings;
-            find_process_timer = new System.Threading.Timer(FindProcess, null, 0, 40000);
+            // create timer, but don't start yet. Some static fields may not be ready yet
+            find_process_timer = new Timer(FindProcess, null, Timeout.Infinite, FindProcessTimerDuration);
+            Main.RegisterOnFinishedLoading(Main_OnInitialized);
+        }
+
+        private void Main_OnInitialized(object sender, EventArgs e)
+        {
+            // main is Initialized, start timer
+            find_process_timer.Change(0, FindProcessTimerDuration); 
         }
 
         private void FindProcess(Object stateInfo)