feat: initialize panel.

src/Ursa/Controls/Panels/UrsaTimePickerPanel.cs

@@ -0,0 +1,28 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Controls.Primitives;
+using Avalonia.Input;
+
+namespace Ursa.Controls.Panels;
+
+/// <summary>
+/// The panel to display items for time selection 
+/// </summary>
+public class UrsaTimePickerPanel: Panel
+{
+    /// <summary>
+    /// Defines whether the panel is looping.
+    /// This is ont applicable for columns like year and AM/PM designation. 
+    /// </summary>
+    public static readonly StyledProperty<bool> IsLoopingProperty = AvaloniaProperty.Register<UrsaTimePickerPanel, bool>(
+        nameof(IsLooping));
+
+    /// <summary>
+    /// Gets or sets the value of <see cref="IsLoopingProperty"/>.
+    /// </summary>
+    public bool IsLooping
+    {
+        get => GetValue(IsLoopingProperty);
+        set => SetValue(IsLoopingProperty, value);
+    }
+}

src/Ursa/Controls/TimePicker/TimePicker.cs

@@ -32,4 +32,13 @@ public class TimePicker: TemplatedControl
         get => GetValue(SelectedTimeProperty);
         set => SetValue(SelectedTimeProperty, value);
     }
+    
+    public static readonly StyledProperty<bool> NeedConfirmProperty = AvaloniaProperty.Register<TimePicker, bool>(
+        nameof(NeedConfirm));
+
+    public bool NeedConfirm
+    {
+        get => GetValue(NeedConfirmProperty);
+        set => SetValue(NeedConfirmProperty, value);
+    }
 }