Added theme switching support for ControlCatalog

samples/ControlCatalog/MainView.xaml

@@ -1,32 +1,41 @@
 <UserControl xmlns="https://github.com/avaloniaui"
         xmlns:pages="clr-namespace:ControlCatalog.Pages"
-        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
-  <TabControl Classes="sidebar" Name="Sidebar">
-    <TabItem Header="AutoCompleteBox"><pages:AutoCompleteBoxPage/></TabItem>
-    <TabItem Header="Border"><pages:BorderPage/></TabItem>
-    <TabItem Header="Button"><pages:ButtonPage/></TabItem>
-    <TabItem Header="ButtonSpinner"><pages:ButtonSpinnerPage/></TabItem>
-    <TabItem Header="Calendar"><pages:CalendarPage/></TabItem>
-    <TabItem Header="Canvas"><pages:CanvasPage/></TabItem>
-    <TabItem Header="Carousel"><pages:CarouselPage/></TabItem>
-    <TabItem Header="CheckBox"><pages:CheckBoxPage/></TabItem>
-    <TabItem Header="ContextMenu"><pages:ContextMenuPage/></TabItem>
-    <TabItem Header="DatePicker"><pages:DatePickerPage/></TabItem>
-    <TabItem Header="Drag+Drop"><pages:DragAndDropPage/></TabItem>
-    <TabItem Header="DropDown"><pages:DropDownPage/></TabItem>
-    <TabItem Header="Expander"><pages:ExpanderPage/></TabItem>
-    <TabItem Header="Image"><pages:ImagePage/></TabItem>
-    <TabItem Header="LayoutTransformControl"><pages:LayoutTransformControlPage/></TabItem>
-    <TabItem Header="ListBox"><pages:ListBoxPage/></TabItem>
-    <TabItem Header="Menu"><pages:MenuPage/></TabItem>
-	<TabItem Header="NumericUpDown"><pages:NumericUpDownPage/></TabItem>
-    <TabItem Header="ProgressBar"><pages:ProgressBarPage/></TabItem>
-    <TabItem Header="RadioButton"><pages:RadioButtonPage/></TabItem>
-    <TabItem Header="Slider"><pages:SliderPage/></TabItem>
-    <TabItem Header="TextBox"><pages:TextBoxPage/></TabItem>
-    <TabItem Header="ToolTip"><pages:ToolTipPage/></TabItem>
-    <TabItem Header="TreeView"><pages:TreeViewPage/></TabItem>
-    <TabItem Header="TabControl"><pages:TabControlPage/></TabItem>
-    <TabItem Header="Viewbox"><pages:ViewboxPage/></TabItem>
-  </TabControl>
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        Background="{DynamicResource ThemeBackgroundBrush}"
+        Foreground="{DynamicResource ThemeForegroundBrush}"
+        FontSize="{DynamicResource FontSizeNormal}">
+  <Grid>
+    <DropDown x:Name="Themes" SelectedIndex="0" Width="100" Margin="8" HorizontalAlignment="Right" VerticalAlignment="Bottom">
+      <DropDownItem>Light</DropDownItem>
+      <DropDownItem>Dark</DropDownItem>
+    </DropDown>
+    <TabControl Classes="sidebar" Name="Sidebar">
+      <TabItem Header="AutoCompleteBox"><pages:AutoCompleteBoxPage/></TabItem>
+      <TabItem Header="Border"><pages:BorderPage/></TabItem>
+      <TabItem Header="Button"><pages:ButtonPage/></TabItem>
+      <TabItem Header="ButtonSpinner"><pages:ButtonSpinnerPage/></TabItem>
+      <TabItem Header="Calendar"><pages:CalendarPage/></TabItem>
+      <TabItem Header="Canvas"><pages:CanvasPage/></TabItem>
+      <TabItem Header="Carousel"><pages:CarouselPage/></TabItem>
+      <TabItem Header="CheckBox"><pages:CheckBoxPage/></TabItem>
+      <TabItem Header="ContextMenu"><pages:ContextMenuPage/></TabItem>
+      <TabItem Header="DatePicker"><pages:DatePickerPage/></TabItem>
+      <TabItem Header="Drag+Drop"><pages:DragAndDropPage/></TabItem>
+      <TabItem Header="DropDown"><pages:DropDownPage/></TabItem>
+      <TabItem Header="Expander"><pages:ExpanderPage/></TabItem>
+      <TabItem Header="Image"><pages:ImagePage/></TabItem>
+      <TabItem Header="LayoutTransformControl"><pages:LayoutTransformControlPage/></TabItem>
+      <TabItem Header="ListBox"><pages:ListBoxPage/></TabItem>
+      <TabItem Header="Menu"><pages:MenuPage/></TabItem>
+	  <TabItem Header="NumericUpDown"><pages:NumericUpDownPage/></TabItem>
+      <TabItem Header="ProgressBar"><pages:ProgressBarPage/></TabItem>
+      <TabItem Header="RadioButton"><pages:RadioButtonPage/></TabItem>
+      <TabItem Header="Slider"><pages:SliderPage/></TabItem>
+      <TabItem Header="TextBox"><pages:TextBoxPage/></TabItem>
+      <TabItem Header="ToolTip"><pages:ToolTipPage/></TabItem>
+      <TabItem Header="TreeView"><pages:TreeViewPage/></TabItem>
+      <TabItem Header="TabControl"><pages:TabControlPage/></TabItem>
+      <TabItem Header="Viewbox"><pages:ViewboxPage/></TabItem>
+    </TabControl>
+  </Grid>
 </UserControl>

samples/ControlCatalog/MainView.xaml.cs

@@ -2,6 +2,7 @@ using System.Collections;
 using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Markup.Xaml;
+using Avalonia.Markup.Xaml.Styling;
 using Avalonia.Platform;
 using ControlCatalog.Pages;
 
@@ -27,6 +28,22 @@ namespace ControlCatalog
                 });
 
             }
+            var light = AvaloniaXamlLoader.Parse<StyleInclude>(@"<StyleInclude xmlns='https://github.com/avaloniaui' Source='resm:Avalonia.Themes.Default.Accents.BaseLight.xaml?assembly=Avalonia.Themes.Default'/>");
+            var dark = AvaloniaXamlLoader.Parse<StyleInclude>(@"<StyleInclude xmlns='https://github.com/avaloniaui' Source='resm:Avalonia.Themes.Default.Accents.BaseDark.xaml?assembly=Avalonia.Themes.Default'/>");
+            var themes = this.Find<DropDown>("Themes");
+            themes.SelectionChanged += (sender, e) =>
+            {
+                switch (themes.SelectedIndex)
+                {
+                    case 0:
+                        Styles[0] = light;
+                        break;
+                    case 1:
+                        Styles[0] = dark;
+                        break;
+                }
+            };
+            Styles.Add(light);
         }
 
         private void InitializeComponent()