feat: enable drag-n-drop

src/Lumper.UI/App.axaml.cs

@@ -1,5 +1,6 @@
 using Avalonia;
 using Avalonia.Controls.ApplicationLifetimes;
+using Avalonia.Input;
 using Avalonia.Markup.Xaml;
 using Lumper.UI.ViewModels;
 using Lumper.UI.Views;
@@ -17,11 +18,22 @@ public override void OnFrameworkInitializationCompleted()
  {
  if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime
  desktop)
+ {
+ var vm = new MainWindowViewModel();
  desktop.MainWindow = new MainWindow
  {
- DataContext = new MainWindowViewModel()
+ DataContext = vm,
  };
 
+ desktop.MainWindow.AddHandler(DragDrop.DragOverEvent, MainWindowViewModel.DragOver);
+ desktop.MainWindow.AddHandler(DragDrop.DropEvent, vm.Drop);
+
+ if (desktop.Args?.Length > 0)
+ {
+ vm.LoadBsp(desktop.Args[0]);
+ }
+ }
+
  base.OnFrameworkInitializationCompleted();
  }
 }

src/Lumper.UI/ViewModels/MainWindowViewModel.IO.cs

@@ -148,13 +148,13 @@ private async void Save(string path)
  _bspModel.FilePath = path;
  }
 
- private void LoadBsp(string path)
+ public void LoadBsp(string path)
  {
  var bspFile = new BspFile(path);
  BspModel = new BspViewModel(this, bspFile);
  }
 
- private async Task LoadBsp(IStorageFile file)
+ public async Task LoadBsp(IStorageFile file)
  {
  if (!file.CanOpenRead)
  return;
@@ -163,7 +163,7 @@ private async Task LoadBsp(IStorageFile file)
  if(!file.TryGetUri(out var path))
  {
  throw new Exception("Failed to get file path");
- 
+
  }
  LoadBsp(path.AbsolutePath);
  }

src/Lumper.UI/ViewModels/MainWindowViewModel.cs

@@ -1,6 +1,10 @@
 using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
 using Avalonia;
 using Avalonia.Controls.ApplicationLifetimes;
+using Avalonia.Input;
 using Lumper.UI.ViewModels.Bsp;
 using ReactiveUI;
 
@@ -45,4 +49,48 @@ public BspNodeBase? SelectedNode
  get => _selectedNode;
  set => this.RaiseAndSetIfChanged(ref _selectedNode, value);
  }
+
+ internal static void DragOver(object? sender, DragEventArgs e)
+ {
+ e.DragEffects = DragDropEffects.Link;
+
+ var names = e.Data.GetFileNames() ?? new List<string>();
+
+ if (!e.Data.Contains(DataFormats.FileNames) || !names.FirstOrDefault("").ToLower().EndsWith(".bsp"))
+ e.DragEffects = DragDropEffects.None;
+ }
+
+ internal void Drop(object? sender, DragEventArgs e)
+ {
+ if (!e.Data.Contains(DataFormats.FileNames))
+ return;
+
+ var names = e.Data.GetFileNames() ?? new List<string>();
+ foreach (string target in names)
+ {
+ if (!target.ToLower().EndsWith(".bsp"))
+ continue;
+
+ if (BspModel == null)
+ {
+ // if nothing is open, open it.
+ LoadBsp(target);
+ }
+ else
+ {
+ // Otherwise, open a brand new Lumper instance with it.
+ string? executableFileName = Process.GetCurrentProcess().MainModule?.FileName;
+ if (executableFileName == null)
+ return;
+
+ ProcessStartInfo startInfo = new()
+ {
+ ArgumentList = { $"{target}" },
+ FileName = executableFileName,
+ };
+
+ Process.Start(startInfo);
+ }
+ }
+ }
 }

src/Lumper.UI/Views/MainWindow.axaml

@@ -14,6 +14,7 @@
  TransparencyLevelHint="AcrylicBlur"
  ExtendClientAreaToDecorationsHint="True"
  WindowStartupLocation="CenterScreen"
+ DragDrop.AllowDrop="True"
  Background="Transparent">
 
  <Design.DataContext>