init branch

src/Shared/HandyControl_Shared/Controls/Input/ImageSelector.cs

@@ -0,0 +1,38 @@
+using System;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Media;
+using HandyControl.Data;
+
+namespace HandyControl.Controls
+{
+    public class ImageSelector : Control
+    {
+        public static readonly DependencyProperty UriProperty = DependencyProperty.Register(
+            "Uri", typeof(Uri), typeof(ImageSelector), new PropertyMetadata(default(Uri)));
+
+        public Uri Uri
+        {
+            get => (Uri) GetValue(UriProperty);
+            set => SetValue(UriProperty, value);
+        }
+
+        internal static readonly DependencyProperty SourceProperty = DependencyProperty.Register(
+            "Source", typeof(ImageSource), typeof(ImageSelector), new PropertyMetadata(default(ImageSource)));
+
+        internal ImageSource Source
+        {
+            get => (ImageSource) GetValue(SourceProperty);
+            set => SetValue(SourceProperty, value);
+        }
+
+        public static readonly DependencyProperty IsPreviewEnabledProperty = DependencyProperty.Register(
+            "IsPreviewEnabled", typeof(bool), typeof(ImageSelector), new PropertyMetadata(ValueBoxes.FalseBox));
+
+        public bool IsPreviewEnabled
+        {
+            get => (bool) GetValue(IsPreviewEnabledProperty);
+            set => SetValue(IsPreviewEnabledProperty, value);
+        }
+    }
+}

src/Shared/HandyControl_Shared/Controls/Other/GotoTop.cs

@@ -73,7 +73,7 @@ namespace HandyControl.Controls
         }
 
         public static readonly DependencyProperty HidingHeightProperty = DependencyProperty.Register(
-            "HidingHeight", typeof(double), typeof(GotoTop), new PropertyMetadata(default(double)));
+            "HidingHeight", typeof(double), typeof(GotoTop), new PropertyMetadata(ValueBoxes.Double0Box));
 
         public double HidingHeight
         {

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

@@ -76,7 +76,7 @@ namespace HandyControl.Controls
         }
 
         public static readonly DependencyProperty MaxTitleWidthProperty = DependencyProperty.Register(
-            "MaxTitleWidth", typeof(double), typeof(PropertyGrid), new PropertyMetadata(default(double)));
+            "MaxTitleWidth", typeof(double), typeof(PropertyGrid), new PropertyMetadata(ValueBoxes.Double0Box));
 
         public double MaxTitleWidth
         {
@@ -85,7 +85,7 @@ namespace HandyControl.Controls
         }
 
         public static readonly DependencyProperty MinTitleWidthProperty = DependencyProperty.Register(
-            "MinTitleWidth", typeof(double), typeof(PropertyGrid), new PropertyMetadata(default(double)));
+            "MinTitleWidth", typeof(double), typeof(PropertyGrid), new PropertyMetadata(ValueBoxes.Double0Box));
 
         public double MinTitleWidth
         {

src/Shared/HandyControl_Shared/Controls/PropertyGrid/PropertyItem.cs

@@ -2,6 +2,7 @@
 using System.ComponentModel;
 using System.Windows;
 using System.Windows.Controls;
+using HandyControl.Data;
 
 namespace HandyControl.Controls
 {
@@ -62,7 +63,7 @@ namespace HandyControl.Controls
         }
 
         public static readonly DependencyProperty IsReadOnlyProperty = DependencyProperty.Register(
-            "IsReadOnly", typeof(bool), typeof(PropertyItem), new PropertyMetadata(default(bool)));
+            "IsReadOnly", typeof(bool), typeof(PropertyItem), new PropertyMetadata(ValueBoxes.FalseBox));
 
         public bool IsReadOnly
         {
@@ -107,7 +108,7 @@ namespace HandyControl.Controls
         }
 
         public static readonly DependencyProperty IsSelectedProperty = DependencyProperty.Register(
-            "IsSelected", typeof(bool), typeof(PropertyItem), new PropertyMetadata(default(bool)));
+            "IsSelected", typeof(bool), typeof(PropertyItem), new PropertyMetadata(ValueBoxes.FalseBox));
 
         public bool IsSelected
         {
@@ -116,7 +117,7 @@ namespace HandyControl.Controls
         }
 
         public static readonly DependencyProperty IsExpandedEnabledProperty = DependencyProperty.Register(
-            "IsExpandedEnabled", typeof(bool), typeof(PropertyItem), new PropertyMetadata(default(bool)));
+            "IsExpandedEnabled", typeof(bool), typeof(PropertyItem), new PropertyMetadata(ValueBoxes.FalseBox));
 
         public bool IsExpandedEnabled
         {