added two editors

src/Shared/HandyControl_Shared/Controls/PropertyGrid/Editors/HorizontalAlignmentPropertyEditor.cs

@@ -0,0 +1,70 @@
+using System;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Controls.Primitives;
+using System.Windows.Data;
+using System.Windows.Media;
+using System.Windows.Shapes;
+using HandyControl.Tools;
+
+namespace HandyControl.Controls
+{
+    public class HorizontalAlignmentPropertyEditor : PropertyEditorBase
+    {
+        public override FrameworkElement CreateElement(PropertyItem propertyItem) => new System.Windows.Controls.ComboBox
+        {
+            Style = ResourceHelper.GetResource<Style>("ComboBoxCapsule"),
+            ItemsSource = Enum.GetValues(propertyItem.PropertyType),
+            ItemTemplateSelector = ResourceHelper.GetResource<DataTemplateSelector>("HorizontalAlignmentPathTemplateSelector"),
+            HorizontalAlignment = HorizontalAlignment.Left
+        };
+
+        public override DependencyProperty GetDependencyProperty() => Selector.SelectedValueProperty;
+    }
+
+    public class HorizontalAlignmentPathTemplateSelector : DataTemplateSelector
+    {
+        public override DataTemplate SelectTemplate(object item, DependencyObject container)
+        {
+            if (item is HorizontalAlignment horizontalAlignment)
+            {
+                var dataTemplate = new DataTemplate
+                {
+                    DataType = typeof(System.Windows.Controls.ComboBox)
+                };
+
+                var factory = new FrameworkElementFactory(typeof(Path));
+                factory.SetValue(FrameworkElement.WidthProperty, 12.0);
+                factory.SetValue(FrameworkElement.HeightProperty, 10.0);
+                factory.SetBinding(Shape.FillProperty, new Binding(Control.ForegroundProperty.Name)
+                {
+                    RelativeSource = new RelativeSource
+                    {
+                        AncestorType = typeof(ComboBoxItem)
+                    }
+                });
+
+                switch (horizontalAlignment)
+                {
+                    case HorizontalAlignment.Left:
+                        factory.SetValue(Path.DataProperty, ResourceHelper.GetResource<Geometry>("AlignLeftGeometry"));
+                        break;
+                    case HorizontalAlignment.Center:
+                        factory.SetValue(Path.DataProperty, ResourceHelper.GetResource<Geometry>("AlignHCenterGeometry"));
+                        break;
+                    case HorizontalAlignment.Right:
+                        factory.SetValue(Path.DataProperty, ResourceHelper.GetResource<Geometry>("AlignRightGeometry"));
+                        break;
+                    case HorizontalAlignment.Stretch:
+                        factory.SetValue(Path.DataProperty, ResourceHelper.GetResource<Geometry>("AlignHStretchGeometry"));
+                        break;
+                }
+
+                dataTemplate.VisualTree = factory;
+                return dataTemplate;
+            }
+
+            return null;
+        }
+    }
+}

src/Shared/HandyControl_Shared/Controls/PropertyGrid/Editors/PropertyEditorBase.cs

@@ -3,11 +3,11 @@ using System.Windows.Data;
 
 namespace HandyControl.Controls
 {
-    public abstract class PropertyEditorBase : FrameworkElement
+    public abstract class PropertyEditorBase : DependencyObject
     {
         public abstract FrameworkElement CreateElement(PropertyItem propertyItem);
 
-        public virtual void CreateBinding(PropertyItem propertyItem, FrameworkElement element) =>
+        public virtual void CreateBinding(PropertyItem propertyItem, DependencyObject element) =>
             BindingOperations.SetBinding(element, GetDependencyProperty(),
                 new Binding($"({propertyItem.PropertyName})")
                 {

src/Shared/HandyControl_Shared/Controls/PropertyGrid/Editors/VerticalAlignmentPropertyEditor.cs

@@ -0,0 +1,70 @@
+using System;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Controls.Primitives;
+using System.Windows.Data;
+using System.Windows.Media;
+using System.Windows.Shapes;
+using HandyControl.Tools;
+
+namespace HandyControl.Controls
+{
+    public class VerticalAlignmentPropertyEditor : PropertyEditorBase
+    {
+        public override FrameworkElement CreateElement(PropertyItem propertyItem) => new System.Windows.Controls.ComboBox
+        {
+            Style = ResourceHelper.GetResource<Style>("ComboBoxCapsule"),
+            ItemsSource = Enum.GetValues(propertyItem.PropertyType),
+            ItemTemplateSelector = ResourceHelper.GetResource<DataTemplateSelector>("VerticalAlignmentPathTemplateSelector"),
+            HorizontalAlignment = HorizontalAlignment.Left
+        };
+
+        public override DependencyProperty GetDependencyProperty() => Selector.SelectedValueProperty;
+    }
+
+    public class VerticalAlignmentPathTemplateSelector : DataTemplateSelector
+    {
+        public override DataTemplate SelectTemplate(object item, DependencyObject container)
+        {
+            if (item is VerticalAlignment verticalAlignment)
+            {
+                var dataTemplate = new DataTemplate
+                {
+                    DataType = typeof(System.Windows.Controls.ComboBox)
+                };
+
+                var factory = new FrameworkElementFactory(typeof(Path));
+                factory.SetValue(FrameworkElement.WidthProperty, 10.0);
+                factory.SetValue(FrameworkElement.HeightProperty, 12.0);
+                factory.SetBinding(Shape.FillProperty, new Binding(Control.ForegroundProperty.Name)
+                {
+                    RelativeSource = new RelativeSource
+                    {
+                        AncestorType = typeof(ComboBoxItem)
+                    }
+                });
+
+                switch (verticalAlignment)
+                {
+                    case VerticalAlignment.Top:
+                        factory.SetValue(Path.DataProperty, ResourceHelper.GetResource<Geometry>("AlignTopGeometry"));
+                        break;
+                    case VerticalAlignment.Center:
+                        factory.SetValue(Path.DataProperty, ResourceHelper.GetResource<Geometry>("AlignVCenterGeometry"));
+                        break;
+                    case VerticalAlignment.Bottom:
+                        factory.SetValue(Path.DataProperty, ResourceHelper.GetResource<Geometry>("AlignBottomGeometry"));
+                        break;
+                    case VerticalAlignment.Stretch:
+                        factory.SetValue(Path.DataProperty, ResourceHelper.GetResource<Geometry>("AlignVStretchGeometry"));
+                        break;
+                }
+
+                dataTemplate.VisualTree = factory;
+                return dataTemplate;
+            }
+
+            return null;
+        }
+    }
+}