add Avalonia Dialogs

Pilz.UI.AvaloniaUI/Dialogs/AvaloniaDialogBase.Statics.cs

@@ -0,0 +1,47 @@
+using Avalonia.Controls;
+
+namespace Pilz.UI.AvaloniaUI.Dialogs;
+
+public partial class AvaloniaDialogBase
+{
+    public static T Show<T>(string? title, object? icon, object? tag = null) where T : AvaloniaFlyoutBase
+    {
+        return Show(CreatePanelInstance<T>(tag), title, icon);
+    }
+
+    public static Task<T> ShowDialog<T>(Window parent, string? title, object? icon, object? tag = null) where T : AvaloniaFlyoutBase
+    {
+        return ShowDialog(CreatePanelInstance<T>(tag), parent, title, icon);
+    }
+
+    public static T Show<T>(T dialogPanel, string? title, object? icon) where T : AvaloniaFlyoutBase
+    {
+        CreateForm(dialogPanel, title, icon, WindowStartupLocation.CenterScreen).Show();
+        return dialogPanel;
+    }
+
+    public static async Task<T> ShowDialog<T>(T dialogPanel, Window parent, string? title, object? icon) where T : AvaloniaFlyoutBase
+    {
+        await CreateForm(dialogPanel, title, icon, WindowStartupLocation.CenterOwner).ShowDialog(parent);
+        return dialogPanel;
+    }
+
+    private static T CreatePanelInstance<T>(object? tag) where T : AvaloniaFlyoutBase
+    {
+        var dialogPanel = Activator.CreateInstance<T>();
+        dialogPanel.Tag = tag;
+        return dialogPanel;
+    }
+
+    private static AvaloniaDialogBase CreateForm<T>(T dialogPanel, string? title, object? icon, WindowStartupLocation startPosition) where T : AvaloniaFlyoutBase
+    {
+        var dialog = new AvaloniaDialogBase
+        {
+            Title = title,
+            Icon = icon as WindowIcon,
+            WindowStartupLocation = startPosition,
+        };
+        dialog.SetContent(dialogPanel);
+        return dialog;
+    }
+}