feat: WIP

src/Ursa/Controls/NumericUpDown/IntUpDown.cs

@@ -1,4 +1,6 @@
-namespace Ursa.Controls;
+using Avalonia.Utilities;
+
+namespace Ursa.Controls;
 
 public class IntUpDown: NumericUpDownBase<int>
 {
@@ -6,17 +8,41 @@ public class IntUpDown: NumericUpDownBase<int>
 
     static IntUpDown()
     {
-        MaximumProperty.OverrideDefaultValue<IntUpDown>(100);
+        MaximumProperty.OverrideDefaultValue<IntUpDown>(int.MaxValue);
+        StepProperty.OverrideDefaultValue<IntUpDown>(1);
     }
     
     protected override void Increase()
     {
-        //throw new NotImplementedException();
-        Value += Maximum;
+        Value += Step;
     }
 
     protected override void Decrease()
     {
-        Value -= Maximum;
+        Value -= Step;
+    }
+    
+    protected override void UpdateTextToValue(string x)
+    {
+        if (int.TryParse(x, out var value))
+        {
+            Value = value;
+        }
+    }
+
+    protected override bool CommitInput()
+    {
+        // throw new NotImplementedException();
+        return true;
+    }
+
+    protected override void SyncTextAndValue()
+    {
+        // throw new NotImplementedException();
+    }
+
+    protected override int Clamp()
+    {
+        return MathUtilities.Clamp(Value, Maximum, Minimum);
     }
 }

src/Ursa/Controls/NumericUpDown/NumericUpDownBase.cs

@@ -2,19 +2,26 @@
 using Avalonia.Controls;
 using Avalonia.Controls.Metadata;
 using Avalonia.Controls.Primitives;
+using Avalonia.Input;
+using Avalonia.Interactivity;
 
 namespace Ursa.Controls;
 
 [TemplatePart(PART_Spinner, typeof(ButtonSpinner))]
 [TemplatePart(PART_TextBox, typeof(TextBox))]
+[TemplatePart(PART_DragPanel, typeof(Panel))]
 public abstract class NumericUpDown : TemplatedControl
 {
     public const string PART_Spinner = "PART_Spinner";
     public const string PART_TextBox = "PART_TextBox";
+    public const string PART_DragPanel = "PART_DragPanel";
     
-    private Avalonia.Controls.NumericUpDown? _numericUpDown;
-    private ButtonSpinner? _spinner;
-    private TextBox? _textBox;
+    protected internal ButtonSpinner? _spinner;
+    protected internal TextBox? _textBox;
+    protected internal Panel? _dragPanel;
+
+    private Point? _point;
+    private bool _updateFromTextInput;
     
     public static readonly StyledProperty<bool> TextEditableProperty = AvaloniaProperty.Register<NumericUpDown, bool>(
         nameof(TextEditable), defaultValue: true);
@@ -64,6 +71,13 @@ public abstract class NumericUpDown : TemplatedControl
         {
             _textBox.TextChanged -= OnTextChange;
         }
+
+        if (_dragPanel is not null)
+        {
+            _dragPanel.PointerPressed -= OnDragPanelPointerPressed;
+            _dragPanel.PointerMoved -= OnDragPanelPointerMoved;
+            _dragPanel.PointerReleased -= OnDragPanelPointerReleased;
+        }
         _spinner = e.NameScope.Find<ButtonSpinner>(PART_Spinner);
         _textBox = e.NameScope.Find<TextBox>(PART_TextBox);
         if (_spinner is not null)
@@ -75,13 +89,56 @@ public abstract class NumericUpDown : TemplatedControl
         {
             _textBox.TextChanged += OnTextChange;
         }
+
+        if (_dragPanel is not null)
+        {
+            _dragPanel.PointerPressed+= OnDragPanelPointerPressed;
+            _dragPanel.PointerMoved += OnDragPanelPointerMoved;
+            _dragPanel.PointerReleased += OnDragPanelPointerReleased;
+        }
         
     }
 
+    protected override void OnLostFocus(RoutedEventArgs e)
+    {
+        CommitInput();
+        base.OnLostFocus(e);
+    }
+
+    protected override void OnKeyDown(KeyEventArgs e)
+    {
+        if (e.Key == Key.Enter)
+        {
+            var commitSuccess = CommitInput();
+            e.Handled = !commitSuccess;
+        }
+    }
+
+    private void OnDragPanelPointerPressed(object sender, PointerPressedEventArgs e)
+    {
+        _point = e.GetPosition(this);
+    }
+    
+    private void OnDragPanelPointerReleased(object sender, PointerReleasedEventArgs e)
+    {
+        _point = null;
+    }
+    
+    private void OnDragPanelPointerMoved(object sender, PointerEventArgs e)
+    {
+        var point = e.GetPosition(this);
+        var delta = point - _point;
+        if (delta is null)
+        {
+            return;
+        }
+    }
+
     private void OnTextChange(object sender, TextChangedEventArgs e)
     {
-        
-        
+        _updateFromTextInput = true;
+        UpdateTextToValue(_textBox?.Text ?? string.Empty);
+        _updateFromTextInput = false;
     }
 
     private void OnSpin(object sender, SpinEventArgs e)
@@ -98,6 +155,9 @@ public abstract class NumericUpDown : TemplatedControl
 
     protected abstract void Increase();
     protected abstract void Decrease();
+    protected abstract void UpdateTextToValue(string x);
+    protected abstract bool CommitInput();
+    protected abstract void SyncTextAndValue();
 }
 
 public abstract class NumericUpDownBase<T>: NumericUpDown where T: struct, IComparable<T>
@@ -128,6 +188,15 @@ public abstract class NumericUpDownBase<T>: NumericUpDown where T: struct, IComp
         get => GetValue(MinimumProperty);
         set => SetValue(MinimumProperty, value);
     }
-    
-    
+
+    public static readonly StyledProperty<T> StepProperty = AvaloniaProperty.Register<NumericUpDownBase<T>, T>(
+        nameof(Step));
+
+    public T Step
+    {
+        get => GetValue(StepProperty);
+        set => SetValue(StepProperty, value);
+    }
+
+    protected abstract T Clamp();
 }