Creating and updating seasons with an editor.

EstusShots.Gtk/Dialogs/DialogBase.cs

@@ -0,0 +1,81 @@
+using System;
+using EstusShots.Shared.Models;
+using Gtk;
+using UI = Gtk.Builder.ObjectAttribute;
+
+namespace EstusShots.Gtk.Dialogs
+{
+    public class DialogClosedEventArgs<T> : EventArgs where T: class, new()
+    {
+        public bool Ok { get; }
+        public T Model { get; }
+        
+        public DialogClosedEventArgs(bool ok, T model)
+        {
+            Ok = ok;
+            Model = model;
+        }
+    }
+    public delegate void DialogClosedEventHandler<T>(object o, DialogClosedEventArgs<T> args) where T: class, new();
+    
+    // TODO remove non-generic version
+    public class DialogClosedEventArgs : EventArgs
+    {
+        public bool Ok { get; }
+        public object Model { get; }
+        
+        public DialogClosedEventArgs(bool ok, object model)
+        {
+            Ok = ok;
+            Model = model;
+        }
+    }
+    public delegate void DialogClosedEventHandler(object o, DialogClosedEventArgs args);
+    
+    public abstract class DialogBase<T> where T: class, new()
+    {
+        protected T EditObject { get; set; }
+
+        [UI] private readonly Dialog _editorDialog = null;
+        [UI] private readonly Button _saveButton = null;
+        [UI] private readonly Button _cancelButton = null;
+        
+        public event DialogClosedEventHandler<T> OnDialogClosed;
+        
+        protected DialogBase(Window parent, Builder builder)
+        {
+            builder.Autoconnect(this);
+
+            _saveButton.Clicked += OnSaveButtonClicked;
+            _cancelButton.Clicked += (sender, args) =>
+            {
+                OnDialogClosed?.Invoke(this, new DialogClosedEventArgs<T>(false, new T()));
+                _editorDialog.Dispose();
+            };
+            _editorDialog.TransientFor = parent;
+        }
+
+        public void Show()
+        {
+            LoadFromModel();
+            _editorDialog.Show();
+        }
+        
+        private void OnSaveButtonClicked(object sender, EventArgs e)
+        {
+            try
+            {
+                LoadToModel();
+                OnDialogClosed?.Invoke(this, new DialogClosedEventArgs<T>(true, EditObject));
+                _editorDialog.Dispose();
+            }
+            catch (Exception exception)
+            {
+                ErrorDialog.Show(new OperationResult(exception));
+            }
+        }
+
+        protected abstract void LoadToModel();
+        protected abstract void LoadFromModel();
+    }
+}