fix: completely fix timepicker racing issue.

src/Ursa/Controls/DateTimePicker/DatePicker.cs

@@ -57,22 +57,6 @@ public class DatePicker: DatePickerBase, IClearControl
         SyncSelectedDateToText(args.NewValue.Value);
     }
 
-    protected override void OnPropertyChanged(AvaloniaPropertyChangedEventArgs change)
-    {
-        base.OnPropertyChanged(change);
-        if (change.Property == IsDropdownOpenProperty)
-        {
-            if (change.GetNewValue<bool>() == false)
-            {
-                
-            }
-            else
-            {
-                
-            }
-        }
-    }
-
     protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
     {
         base.OnApplyTemplate(e);

src/Ursa/Controls/DateTimePicker/DateTimePicker.cs

@@ -15,7 +15,7 @@ namespace Ursa.Controls;
 [TemplatePart(PART_Popup, typeof(Popup))]
 [TemplatePart(PART_TextBox, typeof(TextBox))]
 [TemplatePart(PART_Calendar, typeof(CalendarView))]
-[TemplatePart(PART_TimePicker, typeof(TimePicker))]
+[TemplatePart(PART_TimePicker, typeof(TimePickerPresenter))]
 public class DateTimePicker : DatePickerBase
 {
     public const string PART_Button = "PART_Button";
@@ -85,14 +85,14 @@ public class DateTimePicker : DatePickerBase
         {
             _textBox?.SetValue(TextBox.TextProperty, null);
             _calendar?.ClearSelection();
-            _timePickerPresenter?.SetValue(TimePickerPresenter.TimeProperty, null);
+            _timePickerPresenter?.SyncTime(null);
         }
         else
         {
             _textBox?.SetValue(TextBox.TextProperty,
                 date.Value.ToString(DisplayFormat ?? CultureInfo.InvariantCulture.DateTimeFormat.FullDateTimePattern));
             _calendar?.MarkDates(date.Value.Date, date.Value.Date);
-            _timePickerPresenter?.SetValue(TimePickerPresenter.TimeProperty, date.Value.TimeOfDay);
+            _timePickerPresenter?.SyncTime(date.Value.TimeOfDay);
         }
     }
 
@@ -175,7 +175,7 @@ public class DateTimePicker : DatePickerBase
             var date = SelectedDate ?? DateTime.Now;
             _calendar.ContextDate = new CalendarContext(date.Year, date.Month);
             _calendar.UpdateDayButtons();
-            _timePickerPresenter?.SetValue(TimePickerPresenter.TimeProperty, SelectedDate?.TimeOfDay);
+            _timePickerPresenter?.SyncTime(SelectedDate?.TimeOfDay);
         }
 
         SetCurrentValue(IsDropdownOpenProperty, true);
@@ -193,7 +193,7 @@ public class DateTimePicker : DatePickerBase
         {
             SetCurrentValue(SelectedDateProperty, null);
             _calendar?.ClearSelection();
-            _timePickerPresenter?.SetValue(TimePickerPresenter.TimeProperty, null);
+            _timePickerPresenter?.SyncTime(null);
         }
         else if (DisplayFormat is null || DisplayFormat.Length == 0)
         {
@@ -201,7 +201,7 @@ public class DateTimePicker : DatePickerBase
             {
                 SetCurrentValue(SelectedDateProperty, defaultTime);
                 _calendar?.MarkDates(defaultTime.Date, defaultTime.Date);
-                _timePickerPresenter?.SetValue(TimePickerPresenter.TimeProperty, defaultTime.TimeOfDay);
+                _timePickerPresenter?.SyncTime(defaultTime.TimeOfDay);
             }
         }
         else
@@ -217,14 +217,14 @@ public class DateTimePicker : DatePickerBase
                 }
 
                 _calendar?.MarkDates(date.Date, date.Date);
-                _timePickerPresenter?.SetValue(TimePickerPresenter.TimeProperty, date.TimeOfDay);
+                _timePickerPresenter?.SyncTime(date.TimeOfDay);
             }
             else
             {
                 SetCurrentValue(SelectedDateProperty, null);
                 if (!fromText) _textBox?.SetValue(TextBox.TextProperty, null);
                 _calendar?.ClearSelection();
-                _timePickerPresenter?.SetValue(TimePickerPresenter.TimeProperty, null);
+                _timePickerPresenter?.SyncTime(null);
             }
         }
     }
@@ -236,7 +236,7 @@ public class DateTimePicker : DatePickerBase
             var date = SelectedDate ?? DateTime.Today;
             _calendar.ContextDate = _calendar.ContextDate.With(date.Year, date.Month);
             _calendar.UpdateDayButtons();
-            _timePickerPresenter?.SetValue(TimePickerPresenter.TimeProperty, date.TimeOfDay);
+            _timePickerPresenter?.SyncTime(date.TimeOfDay);
         }
 
         SetCurrentValue(IsDropdownOpenProperty, true);

src/Ursa/Controls/DateTimePicker/TimePicker.cs

@@ -29,24 +29,22 @@ public class TimePicker : TimePickerBase, IClearControl
     public static readonly StyledProperty<string?> WatermarkProperty = AvaloniaProperty.Register<TimePicker, string?>(
         nameof(Watermark));
 
-    private bool _suppressTextPresenterEvent;
-
     private Button? _button;
-    private TimePickerPresenter? _presenter;
-    private TextBox? _textBox;
 
+    private bool _isFocused;
+    private Popup? _popup;
+    private TimePickerPresenter? _presenter;
+
+    private bool _suppressTextPresenterEvent;
+    private TextBox? _textBox;
 
     static TimePicker()
     {
+        FocusableProperty.OverrideDefaultValue<TimePicker>(true);
         SelectedTimeProperty.Changed.AddClassHandler<TimePicker, TimeSpan?>((picker, args) =>
             picker.OnSelectionChanged(args));
-        DisplayFormatProperty.Changed.AddClassHandler<TimePicker, string?>((picker, args) => picker.OnDisplayFormatChanged(args));
+        DisplayFormatProperty.Changed.AddClassHandler<TimePicker, string?>((picker, args) =>
-    }
+            picker.OnDisplayFormatChanged(args));
-
-    private void OnDisplayFormatChanged(AvaloniaPropertyChangedEventArgs<string?> _)
-    {
-        if (_textBox is null) return;
-        SyncTimeToText(SelectedTime);
     }
 
     public string? Watermark
@@ -64,7 +62,13 @@ public class TimePicker : TimePickerBase, IClearControl
     public void Clear()
     {
         Focus(NavigationMethod.Pointer);
-        _presenter?.SetValue(TimePickerPresenter.TimeProperty, null);
+        _presenter?.SyncTime(null);
+    }
+
+    private void OnDisplayFormatChanged(AvaloniaPropertyChangedEventArgs<string?> _)
+    {
+        if (_textBox is null) return;
+        SyncTimeToText(SelectedTime);
     }
 
     protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
@@ -73,46 +77,43 @@ public class TimePicker : TimePickerBase, IClearControl
 
         GotFocusEvent.RemoveHandler(OnTextBoxGetFocus, _textBox);
         TextBox.TextChangedEvent.RemoveHandler(OnTextChanged, _textBox);
-        PointerPressedEvent.RemoveHandler(OnTextBoxPointerPressed, _textBox);
         Button.ClickEvent.RemoveHandler(OnButtonClick, _button);
         TimePickerPresenter.SelectedTimeChangedEvent.RemoveHandler(OnPresenterTimeChanged, _presenter);
 
         _textBox = e.NameScope.Find<TextBox>(PART_TextBox);
-        e.NameScope.Find<Popup>(PartNames.PART_Popup);
+        _popup = e.NameScope.Find<Popup>(PartNames.PART_Popup);
         _presenter = e.NameScope.Find<TimePickerPresenter>(PART_Presenter);
         _button = e.NameScope.Find<Button>(PART_Button);
 
         GotFocusEvent.AddHandler(OnTextBoxGetFocus, _textBox);
         TextBox.TextChangedEvent.AddHandler(OnTextChanged, _textBox);
-        PointerPressedEvent.AddHandler(OnTextBoxPointerPressed, RoutingStrategies.Tunnel, false, _textBox);
         Button.ClickEvent.AddHandler(OnButtonClick, _button);
         TimePickerPresenter.SelectedTimeChangedEvent.AddHandler(OnPresenterTimeChanged, _presenter);
 
         // SetCurrentValue(SelectedTimeProperty, DateTime.Now.TimeOfDay);
-        _presenter?.SetValue(TimePickerPresenter.TimeProperty, SelectedTime);
+        // _presenter?.SetValue(TimePickerPresenter.TimeProperty, SelectedTime);
+        _presenter?.SyncTime(SelectedTime);
         SyncTimeToText(SelectedTime);
     }
 
     private void OnPresenterTimeChanged(object? sender, TimeChangedEventArgs e)
     {
+        if (!IsInitialized) return;
         if (_suppressTextPresenterEvent) return;
         SetCurrentValue(SelectedTimeProperty, e.NewTime);
     }
 
     private void OnButtonClick(object? sender, RoutedEventArgs e)
     {
-        Focus(NavigationMethod.Pointer);
+        if(IsFocused)
-        SetCurrentValue(IsDropdownOpenProperty, !IsDropdownOpen);
+        {
-    }
+            SetCurrentValue(IsDropdownOpenProperty, !IsDropdownOpen);
-
+        }
-    private void OnTextBoxPointerPressed(object? sender, PointerPressedEventArgs e)
-    {
-        SetCurrentValue(IsDropdownOpenProperty, true);
     }
 
     private void OnTextBoxGetFocus(object? sender, GotFocusEventArgs e)
     {
-        // SetCurrentValue(IsDropdownOpenProperty, true);
+        SetCurrentValue(IsDropdownOpenProperty, true);
     }
 
     protected override void OnKeyDown(KeyEventArgs e)
@@ -145,17 +146,22 @@ public class TimePicker : TimePickerBase, IClearControl
     {
         if (string.IsNullOrEmpty(_textBox?.Text))
         {
-            TimePickerPresenter.TimeProperty.SetValue(null, _presenter);
+            _presenter?.SyncTime(null);
         }
         else if (DisplayFormat is null || DisplayFormat.Length == 0)
         {
             if (TimeSpan.TryParse(_textBox?.Text, out var defaultTime))
-                TimePickerPresenter.TimeProperty.SetValue(defaultTime, _presenter);
+            {
+                _presenter?.SyncTime(defaultTime);
+            }
         }
         else
         {
             if (DateTime.TryParseExact(_textBox?.Text, DisplayFormat, CultureInfo.CurrentUICulture, DateTimeStyles.None,
-                    out var time)) TimePickerPresenter.TimeProperty.SetValue(time.TimeOfDay, _presenter);
+                    out var time))
+            {
+                _presenter?.SyncTime(time.TimeOfDay);
+            }
         }
     }
 
@@ -163,7 +169,7 @@ public class TimePicker : TimePickerBase, IClearControl
     {
         if (_textBox is null) return;
         _suppressTextPresenterEvent = true;
-        _presenter?.SetValue(TimePickerPresenter.TimeProperty, args.NewValue.Value);
+        _presenter?.SyncTime(args.NewValue.Value);
         SyncTimeToText(args.NewValue.Value);
         _suppressTextPresenterEvent = false;
     }
@@ -176,6 +182,7 @@ public class TimePicker : TimePickerBase, IClearControl
             _textBox.Text = null;
             return;
         }
+
         var date = new DateTime(1, 1, 1, time.Value.Hours, time.Value.Minutes, time.Value.Seconds);
         var text = date.ToString(DisplayFormat);
         _textBox.Text = text;
@@ -199,4 +206,33 @@ public class TimePicker : TimePickerBase, IClearControl
         base.UpdateDataValidation(property, state, error);
         if (property == SelectedTimeProperty) DataValidationErrors.SetError(this, error);
     }
+
+    protected override void OnGotFocus(GotFocusEventArgs e)
+    {
+        base.OnGotFocus(e);
+        FocusChanged(IsKeyboardFocusWithin);
+    }
+
+    protected override void OnLostFocus(RoutedEventArgs e)
+    {
+        base.OnLostFocus(e);
+        FocusChanged(IsKeyboardFocusWithin);
+        var top = TopLevel.GetTopLevel(this);
+        var element = top?.FocusManager?.GetFocusedElement();
+        if (element is Visual v && _popup?.IsInsidePopup(v) == true) return;
+        SetCurrentValue(IsDropdownOpenProperty, false);
+    }
+
+    private void FocusChanged(bool hasFocus)
+    {
+        var wasFocused = _isFocused;
+        _isFocused = hasFocus;
+
+        if (hasFocus)
+            if (!wasFocused && _textBox != null)
+            {
+                _textBox.Focus();
+                _textBox.SelectAll();
+            }
+    }
 }

src/Ursa/Controls/DateTimePicker/TimePickerPresenter.cs

@@ -2,6 +2,7 @@
 using Avalonia.Controls;
 using Avalonia.Controls.Metadata;
 using Avalonia.Controls.Primitives;
+using Avalonia.Input;
 using Avalonia.Interactivity;
 using Irihi.Avalonia.Shared.Helpers;
 
@@ -49,14 +50,14 @@ public class TimePickerPresenter : TemplatedControl
         AvaloniaProperty.Register<TimePickerPresenter, int>(
             nameof(SecondIncrement), 1);
 
-    public static readonly StyledProperty<TimeSpan?> TimeProperty =
-        AvaloniaProperty.Register<TimePickerPresenter, TimeSpan?>(
-            nameof(Time));
-
     public static readonly StyledProperty<string> PanelFormatProperty =
         AvaloniaProperty.Register<TimePickerPresenter, string>(
             nameof(PanelFormat), "HH mm ss t");
 
+    public static readonly RoutedEvent<TimeChangedEventArgs> SelectedTimeChangedEvent =
+        RoutedEvent.Register<TimePickerPresenter, TimeChangedEventArgs>(
+            nameof(SelectedTimeChanged), RoutingStrategies.Bubble);
+
     private Control? _ampmScrollPanel;
     private DateTimePickerPanel? _ampmSelector;
     private Control? _firstSeparator;
@@ -65,26 +66,21 @@ public class TimePickerPresenter : TemplatedControl
     private DateTimePickerPanel? _hourSelector;
     private Control? _minuteScrollPanel;
     private DateTimePickerPanel? _minuteSelector;
+
     private Grid? _pickerContainer;
     private Control? _secondScrollPanel;
     private DateTimePickerPanel? _secondSelector;
     private Control? _secondSeparator;
+
+    private bool _surpressTimeEvent = true;
     private Control? _thirdSeparator;
-    internal TimeSpan TimeHolder;
-    private bool _updateFromTimeChange;
     private bool _use12Clock;
+    internal TimeSpan? TimeHolder;
 
     static TimePickerPresenter()
     {
         PanelFormatProperty.Changed.AddClassHandler<TimePickerPresenter, string>((presenter, args) =>
             presenter.OnPanelFormatChanged(args));
-        TimeProperty.Changed.AddClassHandler<TimePickerPresenter, TimeSpan?>((presenter, args) =>
-            presenter.OnTimeChanged(args));
-    }
-
-    public TimePickerPresenter()
-    {
-        // SetCurrentValue(TimeProperty, DateTime.Now.TimeOfDay);
     }
 
     public bool NeedsConfirmation
@@ -105,40 +101,18 @@ public class TimePickerPresenter : TemplatedControl
         set => SetValue(SecondIncrementProperty, value);
     }
 
-    public TimeSpan? Time
-    {
-        get => GetValue(TimeProperty);
-        set => SetValue(TimeProperty, value);
-    }
-
     public string PanelFormat
     {
         get => GetValue(PanelFormatProperty);
         set => SetValue(PanelFormatProperty, value);
     }
 
-    public static readonly RoutedEvent<TimeChangedEventArgs> SelectedTimeChangedEvent =
-        RoutedEvent.Register<TimePickerPresenter, TimeChangedEventArgs>(
-            nameof(SelectedTimeChanged), RoutingStrategies.Bubble);
-    
     public event EventHandler<TimeChangedEventArgs> SelectedTimeChanged
     {
         add => AddHandler(SelectedTimeChangedEvent, value);
         remove => RemoveHandler(SelectedTimeChangedEvent, value);
     }
 
-    private void OnTimeChanged(AvaloniaPropertyChangedEventArgs<TimeSpan?> args)
-    {
-        _updateFromTimeChange = true;
-        UpdatePanelsFromSelectedTime(args.NewValue.Value);
-        _updateFromTimeChange = false;
-        if (args.OldValue.Value != args.NewValue.Value)
-        {
-            RaiseEvent(new TimeChangedEventArgs(args.OldValue.Value, args.NewValue.Value)
-                { RoutedEvent = SelectedTimeChangedEvent, Source = this });
-        }
-    }
-
     private void OnPanelFormatChanged(AvaloniaPropertyChangedEventArgs<string> args)
     {
         var format = args.NewValue.Value;
@@ -212,47 +186,63 @@ public class TimePickerPresenter : TemplatedControl
     protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
     {
         base.OnApplyTemplate(e);
-        if (_hourSelector is not null) _hourSelector.SelectionChanged -= OnPanelSelectionChanged;
+
-        if (_minuteSelector is not null) _minuteSelector.SelectionChanged -= OnPanelSelectionChanged;
-        if (_secondSelector is not null) _secondSelector.SelectionChanged -= OnPanelSelectionChanged;
-        if (_ampmSelector is not null) _ampmSelector.SelectionChanged -= OnPanelSelectionChanged;
         _hourSelector = e.NameScope.Find<DateTimePickerPanel>(PART_HourSelector);
         _minuteSelector = e.NameScope.Find<DateTimePickerPanel>(PART_MinuteSelector);
         _secondSelector = e.NameScope.Find<DateTimePickerPanel>(PART_SecondSelector);
         _ampmSelector = e.NameScope.Find<DateTimePickerPanel>(PART_AmPmSelector);
-        if (_hourSelector is not null) _hourSelector.SelectionChanged += OnPanelSelectionChanged;
+
-        if (_minuteSelector is not null) _minuteSelector.SelectionChanged += OnPanelSelectionChanged;
-        if (_secondSelector is not null) _secondSelector.SelectionChanged += OnPanelSelectionChanged;
-        if (_ampmSelector is not null) _ampmSelector.SelectionChanged += OnPanelSelectionChanged;
         _pickerContainer = e.NameScope.Find<Grid>(PART_PickerContainer);
         _hourScrollPanel = e.NameScope.Find<Control>(PART_HourScrollPanel);
         _minuteScrollPanel = e.NameScope.Find<Control>(PART_MinuteScrollPanel);
         _secondScrollPanel = e.NameScope.Find<Control>(PART_SecondScrollPanel);
         _ampmScrollPanel = e.NameScope.Find<Control>(PART_AmPmScrollPanel);
+        
         _firstSeparator = e.NameScope.Find<Control>(PART_FirstSeparator);
         _secondSeparator = e.NameScope.Find<Control>(PART_SecondSeparator);
         _thirdSeparator = e.NameScope.Find<Control>(PART_ThirdSeparator);
         Initialize();
         UpdatePanelLayout(PanelFormat);
-        UpdatePanelsFromSelectedTime(Time);
+        _surpressTimeEvent = false;
+    }
+
+    protected override void OnLoaded(RoutedEventArgs e)
+    {
+        base.OnLoaded(e);
+        UpdatePanelsFromSelectedTime(TimeHolder);
+        if (_hourSelector is not null) _hourSelector.SelectionChanged += OnPanelSelectionChanged;
+        if (_minuteSelector is not null) _minuteSelector.SelectionChanged += OnPanelSelectionChanged;
+        if (_secondSelector is not null) _secondSelector.SelectionChanged += OnPanelSelectionChanged;
+        if (_ampmSelector is not null) _ampmSelector.SelectionChanged += OnPanelSelectionChanged;
+    }
+
+    protected override void OnUnloaded(RoutedEventArgs e)
+    {
+        base.OnUnloaded(e);
+        if (_hourSelector is not null) _hourSelector.SelectionChanged -= OnPanelSelectionChanged;
+        if (_minuteSelector is not null) _minuteSelector.SelectionChanged -= OnPanelSelectionChanged;
+        if (_secondSelector is not null) _secondSelector.SelectionChanged -= OnPanelSelectionChanged;
+        if (_ampmSelector is not null) _ampmSelector.SelectionChanged -= OnPanelSelectionChanged;
     }
 
     private void OnPanelSelectionChanged(object? sender, System.EventArgs e)
     {
-        if (_updateFromTimeChange) return;
+        if (_surpressTimeEvent) return;
         if (!_use12Clock && Equals(sender, _ampmSelector)) return;
-        var time = NeedsConfirmation ? TimeHolder : Time ?? DateTime.Now.TimeOfDay;
+        var time = TimeHolder ?? DateTime.Now.TimeOfDay;
         var hour = _hourSelector?.SelectedValue ?? time.Hours;
         var minute = _minuteSelector?.SelectedValue ?? time.Minutes;
         var second = _secondSelector?.SelectedValue ?? time.Seconds;
         var ampm = _ampmSelector?.SelectedValue ?? (time.Hours >= 12 ? 1 : 0);
         if (_use12Clock)
+        {
             hour = ampm switch
             {
                 0 when hour == 12 => 0,
                 1 when hour < 12 => hour + 12,
                 _ => hour
             };
+        }
         else
         {
             ampm = hour switch
@@ -262,11 +252,23 @@ public class TimePickerPresenter : TemplatedControl
             };
             SetIfChanged(_ampmSelector, ampm);
         }
+
         var newTime = new TimeSpan(hour, minute, second);
         if (NeedsConfirmation)
+        {
             TimeHolder = newTime;
+        }
         else
-            SetCurrentValue(TimeProperty, newTime);
+        {
+            if (_surpressTimeEvent) return;
+            RaiseEvent(new TimeChangedEventArgs(null, newTime) { RoutedEvent = SelectedTimeChangedEvent });
+        }
+    }
+
+    protected override void OnPointerPressed(PointerPressedEventArgs e)
+    {
+        base.OnPointerPressed(e);
+        OnPanelSelectionChanged(null, System.EventArgs.Empty);
     }
 
     private void UpdatePanelsFromSelectedTime(TimeSpan? time)
@@ -276,21 +278,19 @@ public class TimePickerPresenter : TemplatedControl
         {
             var index = _use12Clock ? time.Value.Hours % 12 : time.Value.Hours;
             if (_use12Clock && index == 0) index = 12;
-            SetIfChanged(_hourSelector, index);
+            SetIfChanged(_hourSelector, index, true);
         }
-        SetIfChanged(_minuteSelector, time.Value.Minutes);
+
-        SetIfChanged(_secondSelector, time.Value.Seconds);
+        SetIfChanged(_minuteSelector, time.Value.Minutes, true);
+        SetIfChanged(_secondSelector, time.Value.Seconds, true);
         var ampm = time.Value.Hours switch
         {
             >= 12 => 1,
             _ => 0
         };
 
-        SetIfChanged(_ampmSelector, ampm);
+        SetIfChanged(_ampmSelector, ampm, true);
-        if (_ampmSelector is not null)
+        if (_ampmSelector is not null) _ampmSelector.IsEnabled = _use12Clock;
-        {
-            _ampmSelector.IsEnabled = _use12Clock;
-        }
     }
 
     private void Initialize()
@@ -327,12 +327,23 @@ public class TimePickerPresenter : TemplatedControl
 
     public void Confirm()
     {
-        if (NeedsConfirmation) SetCurrentValue(TimeProperty, TimeHolder);
+        if (NeedsConfirmation)
+            RaiseEvent(new TimeChangedEventArgs(null, TimeHolder) { RoutedEvent = SelectedTimeChangedEvent });
     }
 
-    private void SetIfChanged(DateTimePickerPanel? panel, int index)
+    private void SetIfChanged(DateTimePickerPanel? panel, int index, bool surpress = false)
     {
         if (panel is null) return;
+        panel.SelectionChanged -= OnPanelSelectionChanged;
         if (panel.SelectedValue != index) panel.SelectedValue = index;
+        panel.SelectionChanged += OnPanelSelectionChanged;
+    }
+
+    internal void SyncTime(TimeSpan? time)
+    {
+        _surpressTimeEvent = true;
+        TimeHolder = time;
+        UpdatePanelsFromSelectedTime(time);
+        _surpressTimeEvent = false;
     }
 }

src/Ursa/Controls/DateTimePicker/TimeRangePicker.cs

@@ -100,15 +100,16 @@ public class TimeRangePicker : TimePickerBase, IClearControl
     public void Clear()
     {
         Focus(NavigationMethod.Pointer);
-        _startPresenter?.SetValue(TimePickerPresenter.TimeProperty, null);
+        _startPresenter?.SyncTime(null);
-        _endPresenter?.SetValue(TimePickerPresenter.TimeProperty, null);
+        _endPresenter?.SyncTime(null);
     }
 
     private void OnSelectionChanged(AvaloniaPropertyChangedEventArgs<TimeSpan?> args, bool start = true)
     {
         SyncTimeToText(args.NewValue.Value, start);
         _suppressTextPresenterEvent = true;
-        TimePickerPresenter.TimeProperty.SetValue(args.NewValue.Value, start ? _startPresenter : _endPresenter);
+        var presenter = start ? _startPresenter : _endPresenter;
+        presenter?.SyncTime(args.NewValue.Value);
         _suppressTextPresenterEvent = false;
     }
 
@@ -150,8 +151,8 @@ public class TimeRangePicker : TimePickerBase, IClearControl
         Button.ClickEvent.AddHandler(OnButtonClick, _button);
         TimePickerPresenter.SelectedTimeChangedEvent.AddHandler(OnPresenterTimeChanged, _startPresenter, _endPresenter);
         
-        _startPresenter?.SetValue(TimePickerPresenter.TimeProperty, StartTime);
+        _startPresenter?.SyncTime(StartTime);
-        _endPresenter?.SetValue(TimePickerPresenter.TimeProperty, EndTime);
+        _endPresenter?.SyncTime(EndTime);
         SyncTimeToText(StartTime);
         SyncTimeToText(EndTime, false);
     }

tests/HeadlessTest.Ursa/Controls/DateTimePicker/TimePickerPresenterTests.cs

@@ -17,7 +17,7 @@ public class TimePickerPresenterTests
         Assert.False(presenter.NeedsConfirmation);
         Assert.Equal(1, presenter.MinuteIncrement);
         Assert.Equal(1, presenter.SecondIncrement);
-        Assert.Null(presenter.Time);
+        Assert.Null(presenter.TimeHolder);
         Assert.Equal("HH mm ss t", presenter.PanelFormat);
     }
 
@@ -27,9 +27,9 @@ public class TimePickerPresenterTests
         var presenter = new TimePickerPresenter();
         var time = new TimeSpan(10, 30, 45);
 
-        presenter.Time = time;
+        presenter.TimeHolder = time;
 
-        Assert.Equal(time, presenter.Time);
+        Assert.Equal(time, presenter.TimeHolder);
     }
 
     [AvaloniaTheory]
@@ -77,37 +77,44 @@ public class TimePickerPresenterTests
     
     
 
-    [Fact]
+    [AvaloniaFact]
     public void TimePickerPresenter_Confirm_ShouldSetTimeProperty()
     {
         var presenter = new TimePickerPresenter { NeedsConfirmation = true };
         var time = new TimeSpan(10, 30, 45);
+        var eventRaised = 0;
+        TimeSpan? eventResult = null;
+        presenter.SelectedTimeChanged += (o, e) =>
+        {
+            eventRaised++;
+            eventResult = e.NewTime;
+        };
         presenter.TimeHolder = time;
-        Assert.NotEqual(time, presenter.Time);
+        Assert.Null(eventResult);
+        Assert.Equal(0, eventRaised);
 
         presenter.Confirm();
 
-        Assert.Equal(time, presenter.Time);
+        Assert.Equal(time, presenter.TimeHolder);
+        Assert.Equal(time, eventResult);
+        Assert.Equal(1, eventRaised);
     }
 
     [AvaloniaFact]
-    public void TimePickerPresenter_OnTimeChanged_ShouldRaiseEvent()
+    public void TimePickerPresenter_SyncTime_Should_Not_RaiseEvent()
     {
         var presenter = new TimePickerPresenter();
         var oldTime = new TimeSpan(10, 30, 45);
         var newTime = new TimeSpan(11, 45, 30);
-        presenter.Time = oldTime;
+        presenter.SyncTime(oldTime);
         var eventRaised = false;
         presenter.SelectedTimeChanged += (sender, args) =>
         {
             eventRaised = true;
-            Assert.Equal(oldTime, args.OldTime);
-            Assert.Equal(newTime, args.NewTime);
         };
 
-        presenter.Time = newTime;
+        presenter.SyncTime(newTime);
-
+        Assert.False(eventRaised);
-        Assert.True(eventRaised);
     }
 
     [AvaloniaTheory]
@@ -120,6 +127,11 @@ public class TimePickerPresenterTests
         window.Show();
         Dispatcher.UIThread.RunJobs();
         presenter.PanelFormat = format;
+        TimeSpan? eventResult = null;
+        presenter.SelectedTimeChanged += (o, e) =>
+        {
+            eventResult = e.NewTime;
+        };
         Dispatcher.UIThread.RunJobs();
         
         var hourPanel = presenter.GetTemplateChildren().OfType<DateTimePickerPanel>().FirstOrDefault(a => a.Name == TimePickerPresenter.PART_HourSelector);
@@ -137,7 +149,7 @@ public class TimePickerPresenterTests
         secondPanel.SelectedValue = secondSelection;
         amPanel.SelectedValue = amSelection;
         
-        Assert.Equal(expectedTime, presenter.Time);        
+        Assert.Equal(expectedTime, eventResult);        
     }
     
     [AvaloniaTheory]

tests/HeadlessTest.Ursa/Controls/DateTimePicker/TimePickerTests.cs

@@ -0,0 +1,62 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Headless;
+using Avalonia.Headless.XUnit;
+using Avalonia.Input;
+using Avalonia.Layout;
+using Avalonia.Threading;
+using HeadlessTest.Ursa.TestHelpers;
+using TimePicker = Ursa.Controls.TimePicker;
+
+namespace HeadlessTest.Ursa.Controls.DateTimePicker;
+
+public class TimePickerTests
+{
+    [AvaloniaFact]
+    public void Click_Opens_Popup()
+    {
+        var window = new Window();
+        var timePicker = new TimePicker()
+        {
+            Width = 300,
+            HorizontalAlignment = HorizontalAlignment.Left,
+            VerticalAlignment = VerticalAlignment.Top,
+        };
+        window.Content = timePicker;
+        window.Show();
+        Dispatcher.UIThread.RunJobs();
+        Assert.False(timePicker.IsDropdownOpen);
+        window.MouseDown(new Point(10, 10), MouseButton.Left);
+        Assert.True(timePicker.IsDropdownOpen);
+    }
+    
+    [AvaloniaFact]
+    public void Click_Button_Toggles_Popup()
+    {
+        var window = new Window();
+        var picker = new TimePicker()
+        {
+            Width = 300,
+            HorizontalAlignment = HorizontalAlignment.Left,
+            VerticalAlignment = VerticalAlignment.Top
+        };
+        window.Content = picker;
+        window.Show();
+
+        var button = picker.GetTemplateChildOfType<Button>(TimePicker.PART_Button);
+        var position = button?.TranslatePoint(new Point(5, 5), window);
+        Assert.NotNull(position);
+        
+        Assert.False(picker.IsDropdownOpen);
+        Dispatcher.UIThread.RunJobs();
+        window.MouseDown(position.Value, MouseButton.Left);
+        window.MouseUp(position.Value, MouseButton.Left);
+        Dispatcher.UIThread.RunJobs();
+        Assert.True(picker.IsDropdownOpen);
+        
+        window.MouseDown(position.Value, MouseButton.Left);
+        window.MouseUp(position.Value, MouseButton.Left);
+        Dispatcher.UIThread.RunJobs();
+        Assert.False(picker.IsDropdownOpen);
+    }
+}