Numeric UpDown editors: fixed issue with with Value being set before the newValue is coerced and then having the Value set again. Now the Value is coerced and set only once.

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/Core/Primitives/UpDownBase.cs

@@ -73,10 +73,12 @@ namespace Microsoft.Windows.Controls.Primitives
 
         protected virtual void OnValueChanged(T oldValue, T newValue)
         {
-            CoerceValue(newValue);
+            ValidateValue(newValue);
 
             SyncTextAndValueProperties(ValueProperty, string.Empty);
 
+            SetValidSpinDirection();
+
             RoutedPropertyChangedEventArgs<object> args = new RoutedPropertyChangedEventArgs<object>(oldValue, newValue);
             args.RoutedEvent = ValueChangedEvent;
             RaiseEvent(args);
@@ -109,6 +111,8 @@ namespace Microsoft.Windows.Controls.Primitives
             TextBox = GetTemplateChild(ElementTextName) as TextBox;
             Spinner = GetTemplateChild(ElementSpinnerName) as Spinner;
             Spinner.Spin += OnSpinnerSpin;
+
+            SetValidSpinDirection();
         }
 
         protected override void OnGotFocus(RoutedEventArgs e)
@@ -256,12 +260,11 @@ namespace Microsoft.Windows.Controls.Primitives
         }
 
         #region Abstract
-
+        
-
         /// <summary>
         /// Coerces the value.
         /// </summary>
-        protected abstract void CoerceValue(T value);
+        protected abstract T CoerceValue(T value);
 
         /// <summary>
         /// Converts the formatted text to a value.
@@ -284,6 +287,17 @@ namespace Microsoft.Windows.Controls.Primitives
         /// </summary>
         protected abstract void OnDecrement();
 
+        /// <summary>
+        /// Sets the valid spin directions.
+        /// </summary>
+        protected abstract void SetValidSpinDirection();
+
+        /// <summary>
+        /// Validates the value and keeps it between the Min and Max values.
+        /// </summary>
+        /// <param name="value">The value.</param>
+        protected abstract void ValidateValue(T value);
+
         #endregion //Abstract
 
         #endregion //Methods

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/DateTimeUpDown/Implementation/DateTimeUpDown.cs

@@ -128,9 +128,10 @@ namespace Microsoft.Windows.Controls
             TextBox.SelectionChanged += TextBox_SelectionChanged;
         }
 
-        protected override void CoerceValue(DateTime? value)
+        protected override DateTime? CoerceValue(DateTime? value)
         {
-            //TODO: implement Min and Max values and keep the Value between those parameters
+            //TODO: implement Minimum and Maximum
+            return value;
         }
 
         protected override void OnIncrement()
@@ -207,6 +208,11 @@ namespace Microsoft.Windows.Controls
             return dt.ToString(GetFormatString(Format), CultureInfo);
         }
 
+        protected override void SetValidSpinDirection()
+        {
+            //TODO: implement Minimum and Maximum
+        }
+
         protected override void OnValueChanged(DateTime? oldValue, DateTime? newValue)
         {
             //whenever the value changes we need to parse out the value into out DateTimeInfo segments so we can keep track of the individual pieces
@@ -217,6 +223,11 @@ namespace Microsoft.Windows.Controls
             base.OnValueChanged(oldValue, newValue);
         }
 
+        protected override void ValidateValue(DateTime? value)
+        {
+            //TODO: implement min/max
+        }
+
         #endregion //Base Class Overrides
 
         #region Event Hanlders

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/NumericUpDown/Implementation/DecimalUpDown.cs

@@ -20,12 +20,14 @@ namespace Microsoft.Windows.Controls
 
         #region Base Class Overrides
 
-        protected override void CoerceValue(decimal? value)
+        protected override decimal? CoerceValue(decimal? value)
         {
             if (value < Minimum)
-                Value = Minimum;
+                return Minimum;
             else if (value > Maximum)
-                Value = Maximum;
+                return Maximum;
+            else
+                return value;
         }
 
         protected override void OnIncrement()
@@ -54,6 +56,7 @@ namespace Microsoft.Windows.Controls
             try
             {
                 result = FormatString.Contains("P") ? ParsePercent(text, CultureInfo) : ParseDecimal(text, CultureInfo);
+                result = CoerceValue(result);
             }
             catch
             {
@@ -72,6 +75,28 @@ namespace Microsoft.Windows.Controls
             return Value.Value.ToString(FormatString, CultureInfo);
         }
 
+        protected override void SetValidSpinDirection()
+        {
+            ValidSpinDirections validDirections = ValidSpinDirections.None;
+
+            if (Value < Maximum || !Value.HasValue)
+                validDirections = validDirections | ValidSpinDirections.Increase;
+
+            if (Value > Minimum || !Value.HasValue)
+                validDirections = validDirections | ValidSpinDirections.Decrease;
+
+            if (Spinner != null)
+                Spinner.ValidSpinDirection = validDirections;
+        }
+
+        protected override void ValidateValue(decimal? value)
+        {
+            if (value < Minimum)
+                Value = Minimum;
+            else if (value > Maximum)
+                Value = Maximum;
+        }
+
         #endregion //Base Class Overrides
     }
 }

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/NumericUpDown/Implementation/DoubleUpDown.cs

@@ -20,12 +20,14 @@ namespace Microsoft.Windows.Controls
 
         #region Base Class Overrides
 
-        protected override void CoerceValue(double? value)
+        protected override double? CoerceValue(double? value)
         {
             if (value < Minimum)
-                Value = Minimum;
+                return Minimum;
             else if (value > Maximum)
-                Value = Maximum;
+                return Maximum;
+            else
+                return value;
         }
 
         protected override void OnIncrement()
@@ -54,6 +56,7 @@ namespace Microsoft.Windows.Controls
             try
             {
                 result = FormatString.Contains("P") ? Decimal.ToDouble(ParsePercent(text, CultureInfo)) : ParseDouble(text, CultureInfo);
+                result = CoerceValue(result);
             }
             catch
             {
@@ -72,6 +75,28 @@ namespace Microsoft.Windows.Controls
             return Value.Value.ToString(FormatString, CultureInfo);
         }
 
+        protected override void SetValidSpinDirection()
+        {
+            ValidSpinDirections validDirections = ValidSpinDirections.None;
+
+            if (Value < Maximum || !Value.HasValue)
+                validDirections = validDirections | ValidSpinDirections.Increase;
+
+            if (Value > Minimum || !Value.HasValue)
+                validDirections = validDirections | ValidSpinDirections.Decrease;
+
+            if (Spinner != null)
+                Spinner.ValidSpinDirection = validDirections;
+        }
+
+        protected override void ValidateValue(double? value)
+        {
+            if (value < Minimum)
+                Value = Minimum;
+            else if (value > Maximum)
+                Value = Maximum;
+        }
+
         #endregion //Base Class Overrides
     }
 }

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/NumericUpDown/Implementation/IntegerUpDown.cs

@@ -20,12 +20,14 @@ namespace Microsoft.Windows.Controls
 
         #region Base Class Overrides
 
-        protected override void CoerceValue(int? value)
+        protected override int? CoerceValue(int? value)
         {
             if (value < Minimum)
-                Value = Minimum;
+                return Minimum;
             else if (value > Maximum)
-                Value = Maximum;
+                return Maximum;
+            else
+                return value;
         }
 
         protected override void OnIncrement()
@@ -55,6 +57,7 @@ namespace Microsoft.Windows.Controls
             {
                 //don't know why someone would format an integer as %, but just in case they do.
                 result = FormatString.Contains("P") ? Decimal.ToInt32(ParsePercent(text, CultureInfo)) : ParseInt(text, CultureInfo);
+                result = CoerceValue(result);
             }
             catch
             {
@@ -73,6 +76,28 @@ namespace Microsoft.Windows.Controls
             return Value.Value.ToString(FormatString, CultureInfo);
         }
 
+        protected override void SetValidSpinDirection()
+        {
+            ValidSpinDirections validDirections = ValidSpinDirections.None;
+
+            if (Value < Maximum || !Value.HasValue)
+                validDirections = validDirections | ValidSpinDirections.Increase;
+
+            if (Value > Minimum || !Value.HasValue)
+                validDirections = validDirections | ValidSpinDirections.Decrease;
+
+            if (Spinner != null)
+                Spinner.ValidSpinDirection = validDirections;
+        }
+
+        protected override void ValidateValue(int? value)
+        {
+            if (value < Minimum)
+                Value = Minimum;
+            else if (value > Maximum)
+                Value = Maximum;
+        }
+
         #endregion //Base Class Overrides
     }
 }

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/NumericUpDown/Implementation/NumericUpDown.cs

@@ -73,7 +73,7 @@ namespace Microsoft.Windows.Controls
 
         protected virtual void OnMaximumChanged(T oldValue, T newValue)
         {
-            //SetValidSpinDirection();
+            SetValidSpinDirection();
         }
 
         #endregion //Maximum
@@ -96,7 +96,7 @@ namespace Microsoft.Windows.Controls
 
         protected virtual void OnMinimumChanged(T oldValue, T newValue)
         {
-            //SetValidSpinDirection();
+            SetValidSpinDirection();
         }
 
         #endregion //Minimum
@@ -126,8 +126,6 @@ namespace Microsoft.Windows.Controls
                 TextBox.GotKeyboardFocus += OnTextBoxGotKeyBoardFocus;
                 TextBox.PreviewMouseLeftButtonDown += OnTextBoxPreviewMouseLeftButtonDown;
             }
-
-            //SetValidSpinDirection();
         }
 
         #endregion //Base Class Overrides
@@ -152,24 +150,6 @@ namespace Microsoft.Windows.Controls
 
         #region Methods
 
-        /// <summary>
-        /// Sets the valid spin direction based on current value, minimum and maximum.
-        /// </summary>
-        //private void SetValidSpinDirection()
-        //{
-        //    ValidSpinDirections validDirections = ValidSpinDirections.None;
-
-        //    if (Value < Maximum)
-        //        validDirections = validDirections | ValidSpinDirections.Increase;
-
-        //    if (Value > Minimum)
-        //        validDirections = validDirections | ValidSpinDirections.Decrease;
-
-        //    if (Spinner != null)
-        //        Spinner.ValidSpinDirection = validDirections;
-        //}
-
-
         protected static decimal ParseDecimal(string text, IFormatProvider cultureInfo)
         {
             return Decimal.Parse(text, NumberStyles.Any, cultureInfo);