[feat:] first project version

MessageBox.axaml.cs

@@ -0,0 +1,76 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+using System.Threading.Tasks;
+
+namespace PLG_Exam;
+
+public partial class MessageBox : Window
+{
+    public MessageBox()
+    {
+        AvaloniaXamlLoader.Load(this);
+    }
+
+    public static Task<MessageBoxResult> Show(Window? parent, string text, string title, MessageBoxButton buttons = MessageBoxButton.Ok)
+    {
+        var msgbox = new MessageBox()
+        {
+            Title = title
+        };
+        var tb = msgbox.FindControl<TextBlock>("Text");
+        if(tb != null) tb.Text = text;
+        var buttonPanel = msgbox.FindControl<StackPanel>("Buttons");
+
+        var res = MessageBoxResult.Ok;
+
+        void AddButton(string caption, MessageBoxResult r, bool def = false)
+        {
+            var btn = new Button { Content = caption };
+            btn.Click += (_, __) =>
+            {
+                res = r;
+                msgbox.Close();
+            };
+            if(buttonPanel == null) return;
+            buttonPanel.Children.Add(btn);
+            if (def)
+                res = r;
+        }
+
+        if (buttons == MessageBoxButton.Ok || buttons == MessageBoxButton.OkCancel)
+            AddButton("Ok", MessageBoxResult.Ok, true);
+        if (buttons == MessageBoxButton.YesNo || buttons == MessageBoxButton.YesNoCancel)
+        {
+            AddButton("Yes", MessageBoxResult.Yes);
+            AddButton("No", MessageBoxResult.No, true);
+        }
+
+        if (buttons == MessageBoxButton.OkCancel || buttons == MessageBoxButton.YesNoCancel)
+            AddButton("Cancel", MessageBoxResult.Cancel, true);
+
+
+
+        var tcs = new TaskCompletionSource<MessageBoxResult>();
+        msgbox.Closed += delegate { tcs.TrySetResult(res); };
+        if (parent != null)
+            msgbox.ShowDialog(parent);
+        else msgbox.Show();
+        return tcs.Task;
+    }
+}
+public enum MessageBoxButton
+{
+    Ok,
+    OkCancel,
+    YesNo,
+    YesNoCancel
+}
+
+public enum MessageBoxResult
+{
+    Ok,
+    Cancel,
+    Yes,
+    No
+}