Feature: Supported files can now be opened using drag and drop into t…

…he app window.

Issue #17

Speculator/CSharp.Utils/Commands/FileOpenCommand.cs

@@ -55,9 +55,9 @@ await TopLevel
                                              }
                                          }
                                      });
-        var selectedFile = files.FirstOrDefault();
+        var selectedFile = files.FirstOrDefault()?.ToFileInfo();
         if (selectedFile != null)
-            FileSelected?.Invoke(this, new FileInfo(selectedFile.Path.LocalPath));
+            FileSelected?.Invoke(this, selectedFile);
         else
             Cancelled?.Invoke(this, null);
     }

Speculator/CSharp.Utils/Extensions/IStorageItemExtensions.cs

@@ -0,0 +1,23 @@
+// Code authored by Dean Edis (DeanTheCoder).
+// Anyone is free to copy, modify, use, compile, or distribute this software,
+// either in source code form or as a compiled binary, for any non-commercial
+// purpose.
+//
+// If you modify the code, please retain this copyright header,
+// and consider contributing back to the repository or letting us know
+// about your modifications. Your contributions are valued!
+//
+// THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND.
+
+using Avalonia.Platform.Storage;
+
+namespace CSharp.Utils.Extensions;
+
+public static class IStorageItemExtensions
+{
+    public static FileInfo ToFileInfo(this IStorageFile storageFile) =>
+        storageFile != null ? new FileInfo(storageFile.Path.LocalPath) : null;
+
+    public static DirectoryInfo ToDirectoryInfo(this IStorageFolder storageFolder) =>
+        storageFolder != null ? new DirectoryInfo(storageFolder.Path.LocalPath) : null;
+}

Speculator/Speculator/ViewModels/MainWindowViewModel.cs

@@ -10,6 +10,7 @@
 // THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND.
 
 using System;
+using System.IO;
 using Avalonia;
 using Avalonia.Threading;
 using CSharp.Utils.Commands;
@@ -67,8 +68,7 @@ public void LoadGameRom()
         {
             try
             {
-                Speccy.LoadRom(info);
-                Mru.Add(info);
+                LoadGameRomDirect(info);
             }
             finally
             {
@@ -79,6 +79,12 @@ public void LoadGameRom()
         command.Execute(null);
     }
 
+    public void LoadGameRomDirect(FileInfo info)
+    {
+        Speccy.LoadRom(info);
+        Mru.Add(info);
+    }
+
     public void SaveGameRom()
     {
         var keyBlocker = Speccy.PortHandler.CreateKeyBlocker();

Speculator/Speculator/Views/MainWindow.axaml

@@ -15,6 +15,7 @@
         Title="ZX Speculator"
         Width="1066" Height="634"
         MinWidth="520" MinHeight="320"
+        DragDrop.AllowDrop="True"
         x:Name="Self">
     <Design.DataContext>
         <vm:MainWindowViewModel />

Speculator/Speculator/Views/MainWindow.axaml.cs

@@ -10,14 +10,16 @@
 // THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND.
 
 using System;
-using System.Threading.Tasks;
+using System.Linq;
 using Avalonia.Controls;
 using Avalonia.Input;
 using Avalonia.Interactivity;
-using Avalonia.Threading;
+using Avalonia.Platform.Storage;
+using CSharp.Utils.Extensions;
 using CSharp.Utils.UI;
 using Material.Icons.Avalonia;
 using Speculator.ViewModels;
+
 // ReSharper disable UnusedParameter.Local
 
 namespace Speculator.Views;
@@ -31,6 +33,7 @@ public MainWindow()
     {
         InitializeComponent();
 
+        AddHandler(DragDrop.DropEvent, OnDrop);
         Closing += (_, args) => AppCloseHandler.Instance.OnMainWindowClosing(args);
         Closed += (_, _) => (DataContext as IDisposable)?.Dispose();
     }
@@ -77,4 +80,10 @@ private void OnKeyboardIconLoaded(object sender, RoutedEventArgs e)
         };
         icon.PointerExited += (_, _) => Keyboard.Opacity = 0.0;
     }
+
+    private void OnDrop(object sender, DragEventArgs e)
+    {
+        if (e.Data.GetFiles()?.FirstOrDefault() is IStorageFile file)
+            ((MainWindowViewModel)DataContext)?.LoadGameRomDirect(file.ToFileInfo());
+    }
 }