memory optimization

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

@@ -79,13 +79,20 @@ namespace HandyControl.Tools
             Source = new Uri($"pack://application:,,,/HandyControl;component/Themes/Skin{skin}.xaml")
         };
 
+        private static ResourceDictionary HcTheme;
+
         /// <summary>
         ///     get HandyControl theme
         /// </summary>
         /// <returns></returns>
-        public static ResourceDictionary GetTheme() => new Lazy<ResourceDictionary>(() => new ResourceDictionary
+        public static ResourceDictionary GetTheme()
         {
-            Source = new Uri("pack://application:,,,/HandyControl;component/Themes/Theme.xaml")
-        }).Value;
+            HcTheme ??= new ResourceDictionary
+            {
+                Source = new Uri("pack://application:,,,/HandyControl;component/Themes/Theme.xaml")
+            };
+
+            return HcTheme;
+        }
     }
 }

src/Shared/HandyControl_Shared/Tools/StyleSelector/ButtonGroupItemStyleSelector.cs

@@ -1,4 +1,5 @@
-using System.Windows;
+using System.Collections.Generic;
+using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Controls.Primitives;
 using HandyControl.Controls;
@@ -8,6 +9,30 @@ namespace HandyControl.Tools
 {
     public class ButtonGroupItemStyleSelector : StyleSelector
     {
+        private static readonly Dictionary<string, Style> StyleDict = new()
+        {
+            [ResourceToken.RadioGroupItemSingle] = ResourceHelper.GetResourceInternal<Style>(ResourceToken.RadioGroupItemSingle),
+            [ResourceToken.RadioGroupItemHorizontalFirst] = ResourceHelper.GetResourceInternal<Style>(ResourceToken.RadioGroupItemHorizontalFirst),
+            [ResourceToken.RadioGroupItemHorizontalLast] = ResourceHelper.GetResourceInternal<Style>(ResourceToken.RadioGroupItemHorizontalLast),
+            [ResourceToken.RadioGroupItemVerticalFirst] = ResourceHelper.GetResourceInternal<Style>(ResourceToken.RadioGroupItemVerticalFirst),
+            [ResourceToken.RadioGroupItemVerticalLast] = ResourceHelper.GetResourceInternal<Style>(ResourceToken.RadioGroupItemVerticalLast),
+            [ResourceToken.RadioGroupItemDefault] = ResourceHelper.GetResourceInternal<Style>(ResourceToken.RadioGroupItemDefault),
+
+            [ResourceToken.ButtonGroupItemSingle] = ResourceHelper.GetResourceInternal<Style>(ResourceToken.ButtonGroupItemSingle),
+            [ResourceToken.ButtonGroupItemHorizontalFirst] = ResourceHelper.GetResourceInternal<Style>(ResourceToken.ButtonGroupItemHorizontalFirst),
+            [ResourceToken.ButtonGroupItemHorizontalLast] = ResourceHelper.GetResourceInternal<Style>(ResourceToken.ButtonGroupItemHorizontalLast),
+            [ResourceToken.ButtonGroupItemVerticalFirst] = ResourceHelper.GetResourceInternal<Style>(ResourceToken.ButtonGroupItemVerticalFirst),
+            [ResourceToken.ButtonGroupItemVerticalLast] = ResourceHelper.GetResourceInternal<Style>(ResourceToken.ButtonGroupItemVerticalLast),
+            [ResourceToken.ButtonGroupItemDefault] = ResourceHelper.GetResourceInternal<Style>(ResourceToken.ButtonGroupItemDefault),
+
+            [ResourceToken.ToggleButtonGroupItemSingle] = ResourceHelper.GetResourceInternal<Style>(ResourceToken.ToggleButtonGroupItemSingle),
+            [ResourceToken.ToggleButtonGroupItemHorizontalFirst] = ResourceHelper.GetResourceInternal<Style>(ResourceToken.ToggleButtonGroupItemHorizontalFirst),
+            [ResourceToken.ToggleButtonGroupItemHorizontalLast] = ResourceHelper.GetResourceInternal<Style>(ResourceToken.ToggleButtonGroupItemHorizontalLast),
+            [ResourceToken.ToggleButtonGroupItemVerticalFirst] = ResourceHelper.GetResourceInternal<Style>(ResourceToken.ToggleButtonGroupItemVerticalFirst),
+            [ResourceToken.ToggleButtonGroupItemVerticalLast] = ResourceHelper.GetResourceInternal<Style>(ResourceToken.ToggleButtonGroupItemVerticalLast),
+            [ResourceToken.ToggleButtonGroupItemDefault] = ResourceHelper.GetResourceInternal<Style>(ResourceToken.ToggleButtonGroupItemDefault)
+        };
+
         public override Style SelectStyle(object item, DependencyObject container)
         {
             if (container is ButtonGroup buttonGroup && item is ButtonBase buttonBase)
@@ -16,67 +41,67 @@ namespace HandyControl.Tools
 
                 switch (buttonBase)
                 {
-                    case RadioButton _:
+                    case RadioButton:
                         {
                             if (count == 1)
                             {
-                                return ResourceHelper.GetResourceInternal<Style>(ResourceToken.RadioGroupItemSingle);
+                                return StyleDict[ResourceToken.RadioGroupItemSingle];
                             }
 
                             var index = buttonGroup.Items.IndexOf(buttonBase);
                             return buttonGroup.Orientation == Orientation.Horizontal
                                 ? index == 0
-                                    ? ResourceHelper.GetResourceInternal<Style>(ResourceToken.RadioGroupItemHorizontalFirst)
-                                    : ResourceHelper.GetResourceInternal<Style>(index == count - 1
+                                    ? StyleDict[ResourceToken.RadioGroupItemHorizontalFirst]
+                                    : StyleDict[index == count - 1
                                         ? ResourceToken.RadioGroupItemHorizontalLast
-                                        : ResourceToken.RadioGroupItemDefault)
+                                        : ResourceToken.RadioGroupItemDefault]
                                 : index == 0
-                                    ? ResourceHelper.GetResourceInternal<Style>(ResourceToken.RadioGroupItemVerticalFirst)
-                                    : ResourceHelper.GetResourceInternal<Style>(index == count - 1
+                                    ? StyleDict[ResourceToken.RadioGroupItemVerticalFirst]
+                                    : StyleDict[index == count - 1
                                         ? ResourceToken.RadioGroupItemVerticalLast
-                                        : ResourceToken.RadioGroupItemDefault);
+                                        : ResourceToken.RadioGroupItemDefault];
                         }
 
-                    case Button _:
+                    case Button:
                         {
                             if (count == 1)
                             {
-                                return ResourceHelper.GetResourceInternal<Style>(ResourceToken.ButtonGroupItemSingle);
+                                return StyleDict[ResourceToken.ButtonGroupItemSingle];
                             }
 
                             var index = buttonGroup.Items.IndexOf(buttonBase);
                             return buttonGroup.Orientation == Orientation.Horizontal
                                 ? index == 0
-                                    ? ResourceHelper.GetResourceInternal<Style>(ResourceToken.ButtonGroupItemHorizontalFirst)
-                                    : ResourceHelper.GetResourceInternal<Style>(index == count - 1
+                                    ? StyleDict[ResourceToken.ButtonGroupItemHorizontalFirst]
+                                    : StyleDict[index == count - 1
                                         ? ResourceToken.ButtonGroupItemHorizontalLast
-                                        : ResourceToken.ButtonGroupItemDefault)
+                                        : ResourceToken.ButtonGroupItemDefault]
                                 : index == 0
-                                    ? ResourceHelper.GetResourceInternal<Style>(ResourceToken.ButtonGroupItemVerticalFirst)
-                                    : ResourceHelper.GetResourceInternal<Style>(index == count - 1
+                                    ? StyleDict[ResourceToken.ButtonGroupItemVerticalFirst]
+                                    : StyleDict[index == count - 1
                                         ? ResourceToken.ButtonGroupItemVerticalLast
-                                        : ResourceToken.ButtonGroupItemDefault);
+                                        : ResourceToken.ButtonGroupItemDefault];
                         }
 
-                    case ToggleButton _:
+                    case ToggleButton:
                         {
                             if (count == 1)
                             {
-                                return ResourceHelper.GetResourceInternal<Style>(ResourceToken.ToggleButtonGroupItemSingle);
+                                return StyleDict[ResourceToken.ToggleButtonGroupItemSingle];
                             }
 
                             var index = buttonGroup.Items.IndexOf(buttonBase);
                             return buttonGroup.Orientation == Orientation.Horizontal
                                 ? index == 0
-                                    ? ResourceHelper.GetResourceInternal<Style>(ResourceToken.ToggleButtonGroupItemHorizontalFirst)
-                                    : ResourceHelper.GetResourceInternal<Style>(index == count - 1
+                                    ? StyleDict[ResourceToken.ToggleButtonGroupItemHorizontalFirst]
+                                    : StyleDict[index == count - 1
                                         ? ResourceToken.ToggleButtonGroupItemHorizontalLast
-                                        : ResourceToken.ToggleButtonGroupItemDefault)
+                                        : ResourceToken.ToggleButtonGroupItemDefault]
                                 : index == 0
-                                    ? ResourceHelper.GetResourceInternal<Style>(ResourceToken.ToggleButtonGroupItemVerticalFirst)
-                                    : ResourceHelper.GetResourceInternal<Style>(index == count - 1
+                                    ? StyleDict[ResourceToken.ToggleButtonGroupItemVerticalFirst]
+                                    : StyleDict[index == count - 1
                                         ? ResourceToken.ToggleButtonGroupItemVerticalLast
-                                        : ResourceToken.ToggleButtonGroupItemDefault);
+                                        : ResourceToken.ToggleButtonGroupItemDefault];
                         }
                 }
             }