refactor<*>: rewrite all with AvaloniaUI

src/ViewModels/Reset.cs

@@ -0,0 +1,66 @@
+using Avalonia.Media;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace SourceGit.ViewModels {
+    public class ResetMode {
+        public string Name { get; set; }
+        public string Desc { get; set; }
+        public string Arg { get; set; }
+        public IBrush Color { get; set; }
+
+        public ResetMode(string n, string d, string a, IBrush b) {
+            Name = n;
+            Desc = d;
+            Arg = a;
+            Color = b;
+        }
+    }
+
+    public class Reset : Popup {
+        public Models.Branch Current {
+            get;
+            private set;
+        }
+
+        public Models.Commit To {
+            get;
+            private set;
+        }
+
+        public List<ResetMode> Modes {
+            get;
+            private set;
+        }
+
+        public ResetMode SelectedMode {
+            get;
+            set;
+        }
+
+        public Reset(Repository repo, Models.Branch current, Models.Commit to) {
+            _repo = repo;
+            Current = current;
+            To = to;
+            Modes = new List<ResetMode>() {
+                new ResetMode("Soft", "Keep all changes. Stage differences", "--soft", Brushes.Green),
+                new ResetMode("Mixed", "Keep all changes. Unstage differences", "--mixed", Brushes.Orange),
+                new ResetMode("Hard", "Discard all changes", "--hard", Brushes.Red),
+            };
+            SelectedMode = Modes[0];
+            View = new Views.Reset() { DataContext = this };
+        }
+
+        public override Task<bool> Sure() {
+            _repo.SetWatcherEnabled(false);
+            return Task.Run(() => {
+                SetProgressDescription($"Reset current branch to {To.SHA} ...");
+                var succ = new Commands.Reset(_repo.FullPath, To.SHA, SelectedMode.Arg).Exec();
+                CallUIThread(() => _repo.SetWatcherEnabled(true));
+                return succ;
+            });
+        }
+
+        private Repository _repo = null;
+    }
+}