feat: implement drag.

demo/Ursa.Demo/Pages/NumericUpDownDemo.axaml

@@ -9,7 +9,13 @@
     d:DesignWidth="800"
     mc:Ignorable="d">
     <StackPanel>
-        <u:IntUpDown Name="input" Step="1" Value="2" EmptyInputValue="0" />
+        <u:IntUpDown Name="input" Step="1" Value="2" Watermark="Input Value" />
         <TextBlock Text="{Binding #input.Value}" ></TextBlock>
+        <u:DoubleUpDown Name="inputDouble" Step="0.5" Value="3.1" EmptyInputValue="1"></u:DoubleUpDown>
+        <TextBlock Text="{Binding #inputDouble.Value}"></TextBlock>
+        <u:ByteUpDown Name="inputByte" Step="1" Value="3" EmptyInputValue="1"></u:ByteUpDown>
+        <TextBlock Text="{Binding #inputByte.Value}"></TextBlock>
+        <TextBlock Text="Drag"></TextBlock>
+        <u:IntUpDown  Step="1" Value="2" Watermark="Input Value" TextEditable="False" />
     </StackPanel>
 </UserControl>

src/Ursa.Themes.Semi/Controls/NumericUpDown.axaml

@@ -1,7 +1,8 @@
-<ResourceDictionary xmlns="https://github.com/avaloniaui"
+<ResourceDictionary
-                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns="https://github.com/avaloniaui"
-                    xmlns:u="https://irihi.tech/ursa">
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-    <!-- Add Resources Here -->
+    xmlns:u="https://irihi.tech/ursa">
+    <!--  Add Resources Here  -->
     <ControlTheme x:Key="{x:Type u:NumericUpDown}" TargetType="{x:Type u:NumericUpDown}">
         <Setter Property="NumericUpDown.VerticalContentAlignment" Value="Center" />
         <Setter Property="NumericUpDown.CornerRadius" Value="{DynamicResource NumericUpDownCornerRadius}" />
@@ -16,21 +17,30 @@
                         AllowSpin="{TemplateBinding AllowSpin}"
                         Background="{TemplateBinding Background}"
                         BorderBrush="{TemplateBinding BorderBrush}"
-                        BorderThickness="{TemplateBinding BorderThickness}"
+                        BorderThickness="{TemplateBinding BorderThickness}">
-                        >
+                        <Panel>
-                        <TextBox
+                            <TextBox
-                            Name="PART_TextBox"
+                                Name="PART_TextBox"
-                            Height="{TemplateBinding Height}"
+                                Height="{TemplateBinding Height}"
-                            MinHeight="{DynamicResource NumericUpDownWrapperDefaultHeight}"
+                                MinHeight="{DynamicResource NumericUpDownWrapperDefaultHeight}"
-                            AcceptsReturn="False"
+                                AcceptsReturn="False"
-                            CornerRadius="{TemplateBinding CornerRadius}"
+                                CornerRadius="{TemplateBinding CornerRadius}"
-                            DataValidationErrors.Errors="{ReflectionBinding $parent[NumericUpDown].(DataValidationErrors.Errors)}"
+                                DataValidationErrors.Errors="{ReflectionBinding $parent[NumericUpDown].(DataValidationErrors.Errors)}"
-                            FontSize="{TemplateBinding FontSize}"
+                                FontSize="{TemplateBinding FontSize}"
-                            Foreground="{TemplateBinding Foreground}"
+                                Foreground="{TemplateBinding Foreground}"
-                            IsReadOnly="{TemplateBinding IsReadOnly}"
+                                IsReadOnly="{TemplateBinding IsReadOnly}"
-                            TextWrapping="NoWrap"
+                                TextWrapping="NoWrap"
-                            Theme="{DynamicResource NonErrorTextBox}"
+                                Theme="{DynamicResource NonErrorTextBox}"
-                            Watermark="{TemplateBinding Watermark}" />
+                                Watermark="{TemplateBinding Watermark}" />
+                            <Panel
+                                Name="PART_DragPanel"
+                                HorizontalAlignment="Stretch"
+                                VerticalAlignment="Stretch"
+                                Background="Transparent"
+                                Cursor="SizeAll"
+                                IsVisible="{TemplateBinding TextEditable,
+                                                            Converter={x:Static BoolConverters.Not}}" />
+                        </Panel>
                     </ButtonSpinner>
                 </DataValidationErrors>
             </ControlTemplate>

src/Ursa/Controls/NumericUpDown/IntUpDown.cs

@@ -30,3 +30,58 @@ public class IntUpDown : NumericUpDownBase<int>
 
     protected override int? Minus(int? a, int? b) => a - b;
 }
+
+public class DoubleUpDown : NumericUpDownBase<double>
+{
+    protected override Type StyleKeyOverride { get; } = typeof(NumericUpDown);
+
+    static DoubleUpDown()
+    {
+        MaximumProperty.OverrideDefaultValue<DoubleUpDown>(double.MaxValue);
+        MinimumProperty.OverrideDefaultValue<DoubleUpDown>(double.MinValue);
+        StepProperty.OverrideDefaultValue<DoubleUpDown>(1);
+    }
+
+    protected override bool ParseText(string? text, out double? number)
+    {
+        // Weird bug
+        var result = double.TryParse(text, out var value);
+        number = value;
+        return result;
+    }
+
+    protected override string? ValueToString(double? value) => value?.ToString(FormatString, NumberFormat);
+
+    protected override double Zero => 0;
+
+    protected override double? Add(double? a, double? b) => a + b;
+
+    protected override double? Minus(double? a, double? b) => a - b;
+}
+
+public class ByteUpDown : NumericUpDownBase<byte>
+{
+    protected override Type StyleKeyOverride { get; } = typeof(NumericUpDown);
+
+    static ByteUpDown()
+    {
+        MaximumProperty.OverrideDefaultValue<ByteUpDown>(byte.MaxValue);
+        MinimumProperty.OverrideDefaultValue<ByteUpDown>(byte.MinValue);
+        StepProperty.OverrideDefaultValue<ByteUpDown>(1);
+    }
+
+    protected override bool ParseText(string? text, out byte? number)
+    {
+        var result = byte.TryParse(text, ParsingNumberStyle, NumberFormat, out var value);
+        number = value;
+        return result;
+    }
+
+    protected override string? ValueToString(byte? value) => value?.ToString(FormatString, NumberFormat);
+
+    protected override byte Zero => 0;
+
+    protected override byte? Add(byte? a, byte? b) => (byte?) (a + b);
+
+    protected override byte? Minus(byte? a, byte? b) => (byte?) (a - b);
+}

src/Ursa/Controls/NumericUpDown/NumericUpDownBase.cs

@@ -1,4 +1,5 @@
-using System.Globalization;
+using System.Diagnostics;
+using System.Globalization;
 using System.Net.Mime;
 using Avalonia;
 using Avalonia.Controls;
@@ -156,12 +157,6 @@ public abstract class NumericUpDown : TemplatedControl
         {
             _spinner.Spin -= OnSpin;
         }
-        if(_textBox is not null)
-        {
-            _textBox.TextChanged -= OnTextChange;
-            
-        }
-
         if (_dragPanel is not null)
         {
             _dragPanel.PointerPressed -= OnDragPanelPointerPressed;
@@ -170,16 +165,11 @@ public abstract class NumericUpDown : TemplatedControl
         }
         _spinner = e.NameScope.Find<ButtonSpinner>(PART_Spinner);
         _textBox = e.NameScope.Find<TextBox>(PART_TextBox);
+        _dragPanel = e.NameScope.Find<Panel>(PART_DragPanel);
         if (_spinner is not null)
         {
             _spinner.Spin += OnSpin;
         }
-
-        if (_textBox is not null)
-        {
-            _textBox.TextChanged += OnTextChange;
-        }
-
         if (_dragPanel is not null)
         {
             _dragPanel.PointerPressed+= OnDragPanelPointerPressed;
@@ -199,7 +189,7 @@ public abstract class NumericUpDown : TemplatedControl
     {
         if (e.Key == Key.Enter)
         {
-            var commitSuccess = CommitInput();
+            var commitSuccess = CommitInput(true);
             e.Handled = !commitSuccess;
         }
     }
@@ -216,20 +206,36 @@ public abstract class NumericUpDown : TemplatedControl
     
     private void OnDragPanelPointerMoved(object sender, PointerEventArgs e)
     {
+        if (TextEditable) return;
+        if(!e.GetCurrentPoint(this).Properties.IsLeftButtonPressed) return;
         var point = e.GetPosition(this);
         var delta = point - _point;
         if (delta is null)
         {
             return;
         }
+        int d = GetDelta(delta.Value);
+        if(d > 0)
+        {
+            Increase();
+        }
+        else if (d < 0)
+        {
+            Decrease();
+        }
+        _point = point;
     }
 
-    [Obsolete]
+    private int GetDelta(Point point)
-    private void OnTextChange(object sender, TextChangedEventArgs e)
     {
-        _updateFromTextInput = true;
+        bool horizontal = Math.Abs(point.X) > Math.Abs(point.Y);
-        SyncTextAndValue();
+        var value = horizontal ? point.X : point.Y;
-        _updateFromTextInput = false;
+        return value switch
+        {
+            > 0 => 1,
+            < 0 => -1,
+            _ => 0
+        };
     }
     
     private void OnSpin(object sender, SpinEventArgs e)
@@ -495,6 +501,7 @@ public abstract class NumericUpDownBase<T>: NumericUpDown where T: struct, IComp
                     if (_textBox!= null && !Equals(_textBox.Text, newText))
                     {
                         _textBox.Text = newText;
+                        _textBox.CaretIndex = newText?.Length??0;
                     }
                 }
             }