Update checkbox style

src/PicView.Avalonia/PicViewTheme/Controls/CheckBox.axaml

@@ -0,0 +1,76 @@
+<ResourceDictionary xmlns="https://github.com/avaloniaui"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+                    x:ClassModifier="internal">
+  <ControlTheme x:Key="{x:Type CheckBox}"
+                TargetType="CheckBox">
+    <Setter Property="Foreground" Value="{DynamicResource MainTextColor}" />
+    <Setter Property="Background" Value="Transparent" />
+    <Setter Property="BorderBrush" Value="{DynamicResource MainBorderColor}" />
+    <Setter Property="BorderThickness" Value="1" />
+    <Setter Property="Padding" Value="4,0,0,0" />
+    <Setter Property="VerticalContentAlignment" Value="Center" />
+    <Setter Property="HorizontalContentAlignment" Value="Left" />
+    <Setter Property="Template">
+      <ControlTemplate>
+        <Grid ColumnDefinitions="Auto,*">
+          <Border Name="border"
+                  Width="18"
+                  Height="18"
+                  VerticalAlignment="Center"
+                  Background="{TemplateBinding Background}"
+                  BorderBrush="{TemplateBinding BorderBrush}"
+                  BorderThickness="{TemplateBinding BorderThickness}"
+                  CornerRadius="{TemplateBinding CornerRadius}">
+            <Panel>
+              <Path Name="checkMark"
+                    Width="11"
+                    Height="10"
+                    HorizontalAlignment="Center"
+                    VerticalAlignment="Center"
+                    Data="M 1145.607177734375,430 C1145.607177734375,430 1141.449951171875,435.0772705078125 1141.449951171875,435.0772705078125 1141.449951171875,435.0772705078125 1139.232177734375,433.0999755859375 1139.232177734375,433.0999755859375 1139.232177734375,433.0999755859375 1138,434.5538330078125 1138,434.5538330078125 1138,434.5538330078125 1141.482177734375,438 1141.482177734375,438 1141.482177734375,438 1141.96875,437.9375 1141.96875,437.9375 1141.96875,437.9375 1147,431.34619140625 1147,431.34619140625 1147,431.34619140625 1145.607177734375,430 1145.607177734375,430 z"
+                    Fill="{DynamicResource AccentColor}"
+                    FlowDirection="LeftToRight"
+                    Stretch="Uniform" />
+              <Rectangle Name="indeterminateMark"
+                         Width="10"
+                         Height="10"
+                         HorizontalAlignment="Center"
+                         VerticalAlignment="Center"
+                         Fill="{DynamicResource AccentColor}"
+                         Stretch="Uniform" />
+            </Panel>
+          </Border>
+          <ContentPresenter Name="PART_ContentPresenter"
+                            Grid.Column="1"
+                            Margin="{TemplateBinding Padding}"
+                            HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
+                            VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
+                            Content="{TemplateBinding Content}"
+                            ContentTemplate="{TemplateBinding ContentTemplate}"
+                            IsVisible="{TemplateBinding Content,
+                                                        Converter={x:Static ObjectConverters.IsNotNull}}"
+                            RecognizesAccessKey="True"
+                            TextElement.Foreground="{TemplateBinding Foreground}" />
+        </Grid>
+      </ControlTemplate>
+    </Setter>
+    <Style Selector="^:pointerover /template/ Border#border">
+      <Setter Property="BorderBrush" Value="{DynamicResource SecondaryBorderColor}" />
+    </Style>
+    <Style Selector="^ /template/ Path#checkMark">
+      <Setter Property="IsVisible" Value="False" />
+    </Style>
+    <Style Selector="^ /template/ Rectangle#indeterminateMark">
+      <Setter Property="IsVisible" Value="False" />
+    </Style>
+    <Style Selector="^:checked /template/ Path#checkMark">
+      <Setter Property="IsVisible" Value="True" />
+    </Style>
+    <Style Selector="^:indeterminate /template/ Rectangle#indeterminateMark">
+      <Setter Property="IsVisible" Value="True" />
+    </Style>
+    <Style Selector="^:disabled /template/ Border#border">
+      <Setter Property="Opacity" Value="{DynamicResource ThemeDisabledOpacity}" />
+    </Style>
+  </ControlTheme>
+</ResourceDictionary>

src/PicView.Avalonia/PicViewTheme/Index.axaml

@@ -10,6 +10,7 @@
                 <ResourceInclude Source="Controls/AutoScrollViewer.axaml" />
                 <ResourceInclude Source="Controls/Border.axaml" />
                 <ResourceInclude Source="Controls/Button.axaml" />
+                <ResourceInclude Source="Controls/CheckBox.axaml" />
                 <ResourceInclude Source="Controls/ComboBox.axaml" />
                 <ResourceInclude Source="Controls/ComboBoxItem.axaml" />
                 <ResourceInclude Source="Controls/FlyoutPresenter.axaml" />