Semi.Avalonia/src/Semi.Avalonia/Controls/CheckBox.axaml

<ResourceDictionary
    xmlns="https://github.com/avaloniaui"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:CompileBindings="True">
    <ControlTheme x:Key="{x:Type CheckBox}" TargetType="CheckBox">
        <Setter Property="Padding" Value="8,0,0,0" />
        <Setter Property="HorizontalAlignment" Value="Left" />
        <Setter Property="VerticalAlignment" Value="Center" />
        <Setter Property="HorizontalContentAlignment" Value="Left" />
        <Setter Property="VerticalContentAlignment" Value="Center" />
        <Setter Property="FontSize" Value="{DynamicResource CheckboxFontSize}" />
        <Setter Property="CornerRadius" Value="{DynamicResource CheckboxBoxCornerRadius}" />
        <Setter Property="MinHeight" Value="32" />
        <Setter Property="Foreground" Value="{DynamicResource CheckboxForeground}" />
        <Setter Property="Background" Value="{DynamicResource CheckboxDefaultBackground}" />
        <Setter Property="BorderBrush" Value="{DynamicResource CheckboxDefaultBorderBrush}" />
        <Setter Property="Template">
            <ControlTemplate TargetType="CheckBox">
                <Grid x:Name="RootGrid" ColumnDefinitions="Auto,*">
                    <Border
                        x:Name="PART_Border"
                        Grid.Column="0"
                        Grid.ColumnSpan="2"
                        Background="{TemplateBinding Background}"
                        BorderBrush="{TemplateBinding BorderBrush}"
                        BorderThickness="{TemplateBinding BorderThickness}"
                        CornerRadius="{TemplateBinding CornerRadius}" />

                    <Grid
                        Grid.Column="0"
                        Margin="0,0,0,0"
                        VerticalAlignment="Center">
                        <Border
                            x:Name="NormalRectangle"
                            Width="{DynamicResource CheckboxBoxWidth}"
                            Height="{DynamicResource CheckboxBoxHeight}"
                            Background="{DynamicResource CheckboxDefaultBackground}"
                            BorderBrush="{DynamicResource CheckboxDefaultBorderBrush}"
                            BorderThickness="{DynamicResource CheckboxBoxBorderThickness}"
                            CornerRadius="{TemplateBinding CornerRadius}"
                            UseLayoutRounding="False" />
                        <PathIcon
                            Name="CheckGlyph"
                            Width="{DynamicResource CheckboxBoxGlyphWidth}"
                            Height="{DynamicResource CheckboxBoxGlyphHeight}"
                            Foreground="{DynamicResource CheckboxGlyphFill}" />

                    </Grid>
                    <ContentPresenter
                        x:Name="ContentPresenter"
                        Grid.Column="1"
                        Margin="{TemplateBinding Padding}"
                        HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                        VerticalAlignment="Center"
                        Content="{TemplateBinding Content}"
                        ContentTemplate="{TemplateBinding ContentTemplate}"
                        IsVisible="{TemplateBinding Content,
                                                    Converter={x:Static ObjectConverters.IsNotNull}}"
                        RecognizesAccessKey="True"
                        TextWrapping="Wrap" />
                </Grid>
            </ControlTemplate>
        </Setter>

        <!--  Unchecked PointerOver State  -->
        <Style Selector="^:pointerover">
            <Style Selector="^ /template/ Border#NormalRectangle">
                <Setter Property="BorderBrush" Value="{DynamicResource CheckboxPointOverBorderBrush}" />
                <Setter Property="Background" Value="{DynamicResource CheckboxPointOverBackground}" />
            </Style>
        </Style>

        <!--  Unchecked Pressed State  -->
        <Style Selector="^:pressed">
            <Style Selector="^ /template/ Border#NormalRectangle">
                <Setter Property="BorderBrush" Value="{DynamicResource CheckboxPressedBorderBrush}" />
                <Setter Property="Background" Value="{DynamicResource CheckboxPressedBackground}" />
            </Style>
        </Style>

        <!--  Unchecked Disabled state  -->
        <Style Selector="^:disabled">
            <Style Selector="^ /template/ ContentPresenter#ContentPresenter">
                <Setter Property="Foreground" Value="{DynamicResource CheckboxDisabledForeground}" />
            </Style>
            <Style Selector="^ /template/ Border#NormalRectangle">
                <Setter Property="BorderBrush" Value="{DynamicResource CheckboxDefaultDisabledBorderBrush}" />
                <Setter Property="Background" Value="{DynamicResource CheckboxDefaultDisabledBackground}" />
            </Style>
        </Style>

        <Style Selector="^:checked">
            <Style Selector="^ /template/ Border#NormalRectangle">
                <Setter Property="BorderBrush" Value="{DynamicResource CheckboxCheckedDefaultBorderBrush}" />
                <Setter Property="Background" Value="{DynamicResource CheckboxCheckedDefaultBackground}" />
            </Style>

            <Style Selector="^ /template/ PathIcon#CheckGlyph">
                <Setter Property="Data" Value="{DynamicResource CheckBoxCheckGlyph}" />
                <Setter Property="Opacity" Value="1" />
            </Style>

            <!--  Checked PointerOver State  -->
            <Style Selector="^:pointerover">
                <Style Selector="^ /template/ Border#NormalRectangle">
                    <Setter Property="BorderBrush" Value="{DynamicResource CheckboxCheckedPointOverBorderBrush}" />
                    <Setter Property="Background" Value="{DynamicResource CheckboxCheckedPointOverBackground}" />
                </Style>
            </Style>

            <!--  Checked Pressed State  -->
            <Style Selector="^:pressed">
                <Style Selector="^ /template/ Border#NormalRectangle">
                    <Setter Property="BorderBrush" Value="{DynamicResource CheckboxCheckedPressedBorderBrush}" />
                    <Setter Property="Background" Value="{DynamicResource CheckboxCheckedPressedBackground}" />
                </Style>
            </Style>

            <!--  Checked Disabled State  -->
            <Style Selector="^:disabled">
                <Style Selector="^ /template/ ContentPresenter#ContentPresenter">
                    <Setter Property="Foreground" Value="{DynamicResource CheckboxDisabledForeground}" />
                </Style>
                <Style Selector="^ /template/ Border#NormalRectangle">
                    <Setter Property="BorderBrush" Value="{DynamicResource CheckboxCheckedDisabledBorderBrush}" />
                    <Setter Property="Background" Value="{DynamicResource CheckboxCheckedDisabledBackground}" />
                </Style>

                <Style Selector="^ /template/ Path#CheckGlyph">
                    <Setter Property="Fill" Value="{DynamicResource CheckboxGlyphDisabledFill}" />
                </Style>
            </Style>
        </Style>

        <Style Selector="^:indeterminate">
            <Style Selector="^ /template/ Border#NormalRectangle">
                <Setter Property="BorderBrush" Value="{DynamicResource CheckboxCheckedDefaultBorderBrush}" />
                <Setter Property="Background" Value="{DynamicResource CheckboxCheckedDefaultBackground}" />
            </Style>

            <Style Selector="^ /template/ PathIcon#CheckGlyph">
                <Setter Property="Data" Value="{DynamicResource CheckBoxIndeterminateGlyph}" />
                <Setter Property="Opacity" Value="1" />
            </Style>

            <!--  Checked PointerOver State  -->
            <Style Selector="^:pointerover">
                <Style Selector="^ /template/ Border#NormalRectangle">
                    <Setter Property="BorderBrush" Value="{DynamicResource CheckboxCheckedPointOverBorderBrush}" />
                    <Setter Property="Background" Value="{DynamicResource CheckboxCheckedPointOverBackground}" />
                </Style>
            </Style>

            <!--  Checked Pressed State  -->
            <Style Selector="^:pressed">
                <Style Selector="^ /template/ Border#NormalRectangle">
                    <Setter Property="BorderBrush" Value="{DynamicResource CheckboxCheckedPressedBorderBrush}" />
                    <Setter Property="Background" Value="{DynamicResource CheckboxCheckedPressedBackground}" />
                </Style>
            </Style>

            <!--  Checked Disabled State  -->
            <Style Selector="^:disabled">
                <Style Selector="^ /template/ ContentPresenter#ContentPresenter">
                    <Setter Property="Foreground" Value="{DynamicResource CheckboxDisabledForeground}" />
                </Style>
                <Style Selector="^ /template/ Border#NormalRectangle">
                    <Setter Property="BorderBrush" Value="{DynamicResource CheckboxCheckedDisabledBorderBrush}" />
                    <Setter Property="Background" Value="{DynamicResource CheckboxCheckedDisabledBackground}" />
                </Style>

                <Style Selector="^ /template/ Path#CheckGlyph">
                    <Setter Property="Fill" Value="{DynamicResource CheckboxGlyphDisabledFill}" />
                </Style>
            </Style>
        </Style>
    </ControlTheme>
</ResourceDictionary>