feat: setup demo.

demo/Ursa.Demo/ViewModels/DialogDemoViewModel.cs

@@ -0,0 +1,31 @@
+using System;
+using System.Windows.Input;
+using Avalonia.Controls;
+using Avalonia.Controls.Shapes;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using Ursa.Controls;
+
+namespace Ursa.Demo.ViewModels;
+
+public class DialogDemoViewModel: ObservableObject
+{
+    public ICommand ShowLocalOverlayDialogCommand { get; }
+    public ICommand ShowGlobalOverlayDialogCommand { get; }
+
+    public DialogDemoViewModel()
+    {
+        ShowLocalOverlayDialogCommand = new RelayCommand(ShowLocalOverlayDialog);
+        ShowGlobalOverlayDialogCommand = new RelayCommand(ShowGlobalOverlayDialog);
+    }
+
+    private async void ShowGlobalOverlayDialog()
+    {
+        await DialogBox.ShowOverlayAsync<Banner, DateTime>(DateTime.Now, "GlobalHost");
+    }
+
+    private async void ShowLocalOverlayDialog()
+    {
+        await DialogBox.ShowOverlayAsync<Banner, DateTime>(DateTime.Now, "LocalHost");
+    }
+}

demo/Ursa.Demo/ViewModels/MainViewViewModel.cs

@@ -28,6 +28,7 @@ public class MainViewViewModel : ViewModelBase
             MenuKeys.MenuKeyBadge => new BadgeDemoViewModel(),
             MenuKeys.MenuKeyBanner => new BannerDemoViewModel(),
             MenuKeys.MenuKeyButtonGroup => new ButtonGroupDemoViewModel(),
+            MenuKeys.MenuKeyDialog => new DialogDemoViewModel(),
             MenuKeys.MenuKeyDivider => new DividerDemoViewModel(),
             MenuKeys.MenuKeyDualBadge => new DualBadgeDemoViewModel(),
             MenuKeys.MenuKeyImageViewer => new ImageViewerDemoViewModel(),

demo/Ursa.Demo/ViewModels/MenuViewModel.cs

@@ -15,6 +15,7 @@ public class MenuViewModel: ViewModelBase
             new() { MenuHeader = "Badge", Key = MenuKeys.MenuKeyBadge },
             new() { MenuHeader = "Banner", Key = MenuKeys.MenuKeyBanner },
             new() { MenuHeader = "ButtonGroup", Key = MenuKeys.MenuKeyButtonGroup },
+            new() { MenuHeader = "Dialog", Key = MenuKeys.MenuKeyDialog },
             new() { MenuHeader = "Divider", Key = MenuKeys.MenuKeyDivider },
             new() { MenuHeader = "DualBadge", Key = MenuKeys.MenuKeyDualBadge },
             new() { MenuHeader = "IconButton", Key = MenuKeys.MenuKeyIconButton },