aistudio-wpf-diagram/AIStudio.Wpf.Mind/Themes/MindNode.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:dd="https://gitee.com/akwkevin/aistudio.-wpf.-diagram"
                    xmlns:viewmodel="clr-namespace:AIStudio.Wpf.Mind.ViewModels">

    <dd:ColorBrushConverter x:Key="ColorBrushConverter"/>
    <dd:DoubleToCornerRadius x:Key="DoubleToCornerRadius"/>

    <DataTemplate DataType="{x:Type viewmodel:MindLevel1Node}">
        <Grid IsHitTestVisible="False">
            <Grid>
                <Border BorderThickness="1" 
                        BorderBrush="{Binding ColorViewModel.LineColor,Converter={StaticResource ColorBrushConverter}}" 
                        Background="{Binding ColorViewModel.FillColor,Converter={StaticResource ColorBrushConverter}}"
                        CornerRadius="{Binding CornerRadius,Converter={StaticResource DoubleToCornerRadius}}">

                </Border>
            </Grid>
        </Grid>
    </DataTemplate>


</ResourceDictionary>