close #361

src/Shared/HandyControlDemo_Shared/App.xaml

@@ -8,24 +8,15 @@
              xmlns:data="clr-namespace:HandyControlDemo.Data"
              xmlns:hc="https://handyorg.github.io/handycontrol"
              xmlns:langs="clr-namespace:HandyControlDemo.Properties.Langs"
+             xmlns:resources="clr-namespace:HandyControlDemo.Resources"
              d1P1:Ignorable="d" 
              StartupUri="MainWindow.xaml">
     <Application.Resources>
 
         <ResourceDictionary>
             <ResourceDictionary.MergedDictionaries>
-                <ResourceDictionary>
-                    <ResourceDictionary.MergedDictionaries>
-                        <ResourceDictionary Source="pack://application:,,,/HandyControl;component/Themes/SkinDefault.xaml"/>
-                        <ResourceDictionary Source="Resources/Themes/SkinDefault.xaml"/>
-                    </ResourceDictionary.MergedDictionaries>
-                </ResourceDictionary>
-                <ResourceDictionary>
-                    <ResourceDictionary.MergedDictionaries>
-                        <ResourceDictionary Source="pack://application:,,,/HandyControl;component/Themes/Theme.xaml"/>
-                        <ResourceDictionary Source="Resources/Themes/Theme.xaml"/>
-                    </ResourceDictionary.MergedDictionaries>
-                </ResourceDictionary>
+                <hc:Theme Name="HandyTheme"/>
+                <resources:DemoTheme Name="DemoTheme"/>
             </ResourceDictionary.MergedDictionaries>
 
             <langs:LangDecorator x:Key="DemoLangs"/>

src/Shared/HandyControlDemo_Shared/App.xaml.cs

@@ -3,7 +3,9 @@ using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using System.Net;
+#if !netle40
 using System.Runtime;
+#endif
 using System.Security.Authentication; 
 using System.Threading;
 using System.Windows;
@@ -86,21 +88,9 @@ namespace HandyControlDemo
 
         internal void UpdateSkin(SkinType skin)
         {
-            var skins0 = Resources.MergedDictionaries[0];
-            skins0.MergedDictionaries.Clear();
-            skins0.MergedDictionaries.Add(ResourceHelper.GetSkin(skin));
-            skins0.MergedDictionaries.Add(ResourceHelper.GetSkin(typeof(App).Assembly, "Resources/Themes", skin));
+            ResourceHelper.GetTheme("HandyTheme", Resources).Skin = skin;
+            ResourceHelper.GetTheme("DemoTheme", Resources).Skin = skin;
 
-            var skins1 = Resources.MergedDictionaries[1];
-            skins1.MergedDictionaries.Clear();
-            skins1.MergedDictionaries.Add(new ResourceDictionary
-            {
-                Source = new Uri("pack://application:,,,/HandyControl;component/Themes/Theme.xaml")
-            });
-            skins1.MergedDictionaries.Add(new ResourceDictionary
-            {
-                Source = new Uri("pack://application:,,,/HandyControlDemo;component/Resources/Themes/Theme.xaml")
-            });
             Current.MainWindow?.OnApplyTemplate();
         }
 

src/Shared/HandyControlDemo_Shared/HandyControlDemo_Shared.projitems

@@ -29,6 +29,7 @@
       <SubType>Code</SubType>
       <DependentUpon>MainWindow.xaml</DependentUpon>
     </Compile>
+    <Compile Include="$(MSBuildThisFileDirectory)Resources\DemoTheme.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Service\Data\DataService.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\HatchBrushConverter.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\String2BrushConverter.cs" />

src/Shared/HandyControlDemo_Shared/Resources/DemoTheme.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Windows;
+using HandyControl.Data;
+using HandyControl.Themes;
+using HandyControl.Tools;
+
+namespace HandyControlDemo.Resources
+{
+    public class DemoTheme : Theme
+    {
+        public override Uri ThemeUri => new Uri("pack://application:,,,/HandyControlDemo;component/Resources/Themes/Theme.xaml");
+
+        public override ResourceDictionary GetSkin(SkinType skinType) =>
+            ResourceHelper.GetSkin(typeof(App).Assembly, "Resources/Themes", skinType);
+    }
+}

src/Shared/HandyControl_Shared/HandyControl_Shared.projitems

@@ -84,6 +84,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Media\Effects\ContrastEffect.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Media\Effects\EffectBase.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Media\Effects\GrayScaleEffect.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Themes\Theme.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\BorderCircularClipConverter.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\ColLayoutConverter.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\CornerRadiusSplitConverter.cs" />

src/Shared/HandyControl_Shared/Properties/CoreAssemblyInfo.cs

@@ -10,4 +10,5 @@
 [assembly: XmlnsDefinition("https://handyorg.github.io/handycontrol", "HandyControl.Media.Effects")]
 [assembly: XmlnsDefinition("https://handyorg.github.io/handycontrol", "HandyControl.Data")]
 [assembly: XmlnsDefinition("https://handyorg.github.io/handycontrol", "HandyControl.Properties.Langs")]
+[assembly: XmlnsDefinition("https://handyorg.github.io/handycontrol", "HandyControl.Themes")]
 [assembly: XmlnsPrefix("https://handyorg.github.io/handycontrol", "hc")]

src/Shared/HandyControl_Shared/Properties/NetAssemblyInfo.cs

@@ -23,4 +23,5 @@ using System.Runtime.InteropServices;
 [assembly: XmlnsDefinition("https://handyorg.github.io/handycontrol", "HandyControl.Media.Effects")]
 [assembly: XmlnsDefinition("https://handyorg.github.io/handycontrol", "HandyControl.Data")]
 [assembly: XmlnsDefinition("https://handyorg.github.io/handycontrol", "HandyControl.Properties.Langs")]
+[assembly: XmlnsDefinition("https://handyorg.github.io/handycontrol", "HandyControl.Themes")]
 [assembly: XmlnsPrefix("https://handyorg.github.io/handycontrol", "hc")]

src/Shared/HandyControl_Shared/Themes/Theme.cs

@@ -0,0 +1,45 @@
+using System;
+using System.Collections.ObjectModel;
+using System.Windows;
+using HandyControl.Data;
+using HandyControl.Tools;
+
+namespace HandyControl.Themes
+{
+    public class Theme : ResourceDictionary
+    {
+        public Theme() => UpdateResource();
+
+        private SkinType _skin;
+
+        public virtual SkinType Skin
+        {
+            get => _skin;
+            set
+            {
+                if (_skin == value) return;
+                _skin = value;
+
+                UpdateResource();
+            }
+        }
+
+        public string Name { get; set; }
+
+        public virtual Uri ThemeUri => new Uri("pack://application:,,,/HandyControl;component/Themes/Theme.xaml");
+
+        public virtual ResourceDictionary GetSkin(SkinType skinType) => ResourceHelper.GetSkin(skinType);
+
+        private void UpdateResource()
+        {
+            base.MergedDictionaries.Clear();
+            base.MergedDictionaries.Add(GetSkin(Skin));
+            base.MergedDictionaries.Add(new ResourceDictionary
+            {
+                Source = ThemeUri
+            });
+        }
+
+        public new Collection<ResourceDictionary> MergedDictionaries => throw new NotSupportedException();
+    }
+}

src/Shared/HandyControl_Shared/Tools/Helper/ResourceHelper.cs

@@ -4,6 +4,7 @@ using System.Linq;
 using System.Reflection;
 using System.Windows;
 using HandyControl.Data;
+using HandyControl.Themes;
 
 namespace HandyControl.Tools
 {
@@ -85,5 +86,12 @@ namespace HandyControl.Tools
                 };
             }        
         }
+
+        public static Theme GetTheme(string name, ResourceDictionary resourceDictionary)
+        {
+            if (string.IsNullOrEmpty(name) || resourceDictionary == null) return null;
+            return resourceDictionary.MergedDictionaries.OfType<Theme>()
+                .FirstOrDefault(item => Equals(item.Name, name));
+        }
     }
 }