show setup dialog on new startup location

Changelog.md

@@ -6,6 +6,7 @@
   in order to support AviSynth portable mode.
 - New option global-media-keys (next, previous, play/pause, stop).
 - Improved setup dialog.
+- Whenever there is a new startup location, the setup dialog is shown.
 - libmpv updated to shinshiro 2020-11-22.
 
 

mpv.net/Misc/App.cs

@@ -192,5 +192,25 @@ namespace mpvnet
                     return false;
             }
         }
+
+        public static void ShowSetup()
+        {
+            string path = RegistryHelp.GetString(RegistryHelp.ApplicationKey, "SetupDialog");
+
+            if (path != Folder.Startup)
+            {
+                if (Msg.ShowQuestion("Would you like to setup mpv.net for the current startup location?",
+                    "Current startup location:\n\n" + Folder.Startup + "\n\n" +
+                    "The setup allows to create a start menu shortcut, file associations and " +
+                    "add mpv.net to the Path environment variable.\n\n" +
+                    "Show setup dialog?") == MsgResult.OK)
+
+                    Commands.Execute("show-setup-dialog");
+                else
+                    Msg.Show("The setup dialog can be found in the context menu at:\n\nTools > Setup");
+
+                RegistryHelp.SetValue(RegistryHelp.ApplicationKey, "SetupDialog", Folder.Startup);
+            }
+        }
     }
 }

mpv.net/Misc/Commands.cs

@@ -17,7 +17,7 @@ namespace mpvnet
 {
     public class Commands
     {
-        public static void Execute(string id, string[] args)
+        public static void Execute(string id, string[] args = null)
         {
             switch (id)
             {

mpv.net/WinForms/MainForm.cs

@@ -814,6 +814,7 @@ namespace mpvnet
             core.LoadScripts();
             Task.Run(() => App.Extension = new Extension());
             ShownTickCount = Environment.TickCount;
+            App.ShowSetup();
         }
 
         protected override void OnActivated(EventArgs e)