Adjust program to use one instance for loading files (can be disabled in config)

Switch_Toolbox_Library/Config.cs

@@ -244,6 +244,9 @@ namespace Toolbox.Library
                     case "CustomPicureBoxBGColor":
                         TryParseHexColor(node, ref Runtime.CustomPicureBoxBGColor);
                         break;
+                    case "UseSingleInstance":
+                        bool.TryParse(node.InnerText, out Runtime.UseSingleInstance);
+                        break;
                 }
             }
 
@@ -368,6 +371,8 @@ namespace Toolbox.Library
             XmlNode mainSettingsNode = doc.CreateElement("MAINFORM");
             parentNode.AppendChild(mainSettingsNode);
 
+            
+            mainSettingsNode.AppendChild(createNode(doc, "UseSingleInstance", Runtime.UseSingleInstance.ToString()));
             mainSettingsNode.AppendChild(createNode(doc, "UseDirectXTexDecoder", Runtime.UseDirectXTexDecoder.ToString()));
             mainSettingsNode.AppendChild(createNode(doc, "AlwaysCompressOnSave", Runtime.AlwaysCompressOnSave.ToString()));
             mainSettingsNode.AppendChild(createNode(doc, "DisplayViewport", Runtime.DisplayViewport.ToString()));

Switch_Toolbox_Library/Forms/Editors/Object Editor/ObjectEditor.cs

@@ -106,6 +106,7 @@ namespace Toolbox.Library.Forms
         }
 
         public void SelectFirstNode() { if (ObjectTree != null) ObjectTree.SelectFirstNode(); }
+        public void SelectNode(TreeNode node) { if (ObjectTree != null) ObjectTree.SelectNode(node); }
 
         public void SortTreeAscending() { if (ObjectTree != null) ObjectTree.SortTreeAscending(); }
 

Switch_Toolbox_Library/Forms/Editors/Object Editor/ObjectEditorTree.cs

@@ -58,6 +58,8 @@ namespace Toolbox.Library.Forms
                     FileRoot.Nodes.Add(n);
             }
 
+            SelectNode(FileRoot);
+
             for (int i = 0; i < FileRoot.FileNodes.Count; i++)
             {
                 if (FileRoot.FileNodes[i].Item1.OpenFileFormatOnLoad)
@@ -563,6 +565,11 @@ namespace Toolbox.Library.Forms
             treeViewCustom1.Sort();
         }
 
+        public void SelectNode(TreeNode node)
+        {
+            treeViewCustom1.SelectedNode = node;
+        }
+
         private void splitter1_Resize(object sender, EventArgs e)
         {
         }

Switch_Toolbox_Library/Runtime.cs

@@ -15,10 +15,9 @@ namespace Toolbox.Library
 
     public class Runtime
     {
+        public static bool UseSingleInstance = true;
         public static bool UseDirectXTexDecoder = true;
-
         public static bool DEVELOPER_DEBUG_MODE = false;
-
         public static bool AlwaysCompressOnSave = false;
 
         public static class ResourceTables

Toolbox/MainForm.cs

@@ -51,8 +51,6 @@ namespace Toolbox
             FormThemes.ActivePreset = FormThemes.Preset.Dark;
 
             InitializeComponent();
-
-            LoadConfig();
         }
 
         public void UpdateForm()
@@ -65,7 +63,7 @@ namespace Toolbox
         }
 
         //Use for files opened with program
-        public List<string> openedFiles = new List<string>();
+        public List<string> OpenedFiles = new List<string>();
 
         private void Form1_Load(object sender, EventArgs e)
         {
@@ -122,13 +120,13 @@ namespace Toolbox
             ReloadFiles();
             LoadPluginFileContextMenus();
 
-            foreach (string file in openedFiles)
+            foreach (string file in OpenedFiles)
             {
                 if (File.Exists(file))
                     OpenFile(file);
             }
 
-            openedFiles.Clear();
+            OpenedFiles.Clear();
 
             if (Runtime.UseDebugDomainExceptionHandler)
             {
@@ -137,6 +135,17 @@ namespace Toolbox
             }
         }
 
+        public void OpenFiles()
+        {
+            foreach (string file in OpenedFiles)
+            {
+                if (File.Exists(file))
+                    OpenFile(file);
+            }
+
+            OpenedFiles.Clear();
+        }
+
         private void ReloadFiles()
         {
             SupportedFormats = FileManager.GetFileFormats();
@@ -324,8 +333,6 @@ namespace Toolbox
             }
 
             SetFormatSettings(GetActiveIFileFormat());
-
-            ((ObjectEditor)editor).SelectFirstNode();
         }
 
         private void AddObjectEditorFile(TreeNode file, ObjectEditor editor, bool ClearFiles)
@@ -333,6 +340,7 @@ namespace Toolbox
             TabDupeIndex = 0;
             editor.MdiParent = this;
             editor.AddNode(file, ClearFiles);
+            editor.SelectNode(file);
 
             if (file is TreeNodeFile)
             {
@@ -558,7 +566,7 @@ namespace Toolbox
 
         #region Form Settings and plugin menus
 
-        private void LoadConfig()
+        public static void LoadConfig()
         {
             try
             {

Toolbox/Program.cs

@@ -6,6 +6,7 @@ using System.Windows.Forms;
 using System.IO;
 using System.Runtime.InteropServices;
 using System.Reflection;
+using Microsoft.VisualBasic.ApplicationServices;
 
 namespace Toolbox
 {
@@ -35,10 +36,6 @@ namespace Toolbox
             var domain = AppDomain.CurrentDomain;
             domain.AssemblyResolve += LoadAssembly;
 
-            MainForm form = new MainForm();
-            form.openedFiles = Files;
-
-
             bool LoadedDX = TryLoadDirectXTex();
             if (!LoadedDX && !Toolbox.Library.Runtime.UseDirectXTexDecoder)
             {
@@ -49,10 +46,53 @@ namespace Toolbox
                     System.Diagnostics.Process.Start("https://www.microsoft.com/en-us/download/details.aspx?id=35");
                 }
             }
-            Toolbox.Library.Runtime.UseDirectXTexDecoder= LoadedDX;
 
+            MainForm.LoadConfig();
+
+            if (Toolbox.Library.Runtime.UseSingleInstance)
+            {
+                SingleInstanceController controller = new SingleInstanceController();
+                controller.Run(args);
+            }
+            else
+            {
+                MainForm form = new MainForm();
+                form.OpenedFiles = Files;
                 Application.Run(form);
             }
+        }
+
+        public class SingleInstanceController : WindowsFormsApplicationBase
+        {
+            public SingleInstanceController()
+            {
+                IsSingleInstance = true;
+                Startup += OnStart;
+                StartupNextInstance += Program_StartupNextInstance;
+            }
+
+            private void OnStart(object sender, StartupEventArgs e)
+            {
+                List<string> args = new List<string>();
+                foreach (string arg in e.CommandLine)
+                    args.Add(arg);
+
+                Toolbox.MainForm.Instance.OpenedFiles = args;
+            }
+
+            void Program_StartupNextInstance(object sender, StartupNextInstanceEventArgs e)
+            {
+                e.BringToForeground = true;
+                MainForm form = MainForm as MainForm;
+                form.OpenedFiles = e.CommandLine.ToList();
+                form.OpenFiles();
+            }
+
+            protected override void OnCreateMainForm()
+            {
+                MainForm = new MainForm();
+            }
+        }
 
         private static bool TryLoadZSTD()
         {