aistudio-wpf-diagram/AIStudio.Wpf.Flowchart/Controls/ToolBoxControl.xaml

<UserControl x:Class="AIStudio.Wpf.Flowchart.Controls.ToolBoxControl"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:dd="https://gitee.com/akwkevin/aistudio.-wpf.-diagram"
             mc:Ignorable="d" 
             d:DesignHeight="300" d:DesignWidth="300">
    <UserControl.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="pack://application:,,,/AIStudio.Wpf.Flowchart;component/Themes/FlowNode.xaml"/>
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </UserControl.Resources>
    <Border BorderBrush="LightGray" BorderThickness="1">
        <ItemsControl ItemsSource="{Binding ToolBoxItems}">
            <ItemsControl.Template>
                <ControlTemplate TargetType="{x:Type ItemsControl}">
                    <Border BorderThickness="{TemplateBinding Border.BorderThickness}"
                                                Padding="{TemplateBinding Control.Padding}"
                                                BorderBrush="{TemplateBinding Border.BorderBrush}"
                                                Background="{TemplateBinding Panel.Background}"
                                                SnapsToDevicePixels="True">
                        <ScrollViewer VerticalScrollBarVisibility="Auto">
                            <ItemsPresenter SnapsToDevicePixels="{TemplateBinding UIElement.SnapsToDevicePixels}" />
                        </ScrollViewer>
                    </Border>
                </ControlTemplate>
            </ItemsControl.Template>
            <ItemsControl.ItemsPanel>
                <ItemsPanelTemplate>
                    <StackPanel/>
                </ItemsPanelTemplate>
            </ItemsControl.ItemsPanel>
            <ItemsControl.ItemContainerStyle>
                <Style TargetType="{x:Type ContentPresenter}">
                    <Setter Property="Control.Padding"
                                Value="10" />
                    <Setter Property="ContentControl.HorizontalContentAlignment"
                                Value="Stretch" />
                    <Setter Property="ContentControl.VerticalContentAlignment"
                                Value="Stretch" />
                    <Setter Property="ToolTip"
                                Value="{Binding ToolTip}" />
                    <Setter Property="dd:DragAndDropProps.EnabledForDrag"
                                Value="True" />
                </Style>
            </ItemsControl.ItemContainerStyle>
            <ItemsControl.ItemTemplate>
                <DataTemplate>
                    <Grid Margin="5" Width="{Binding Width}" Height="{Binding Height}">
                        <Rectangle Name="Border"
                                    StrokeThickness="1"
                                    StrokeDashArray="2"
                                    Fill="Transparent"
                                    SnapsToDevicePixels="true"/>
                        <Grid IsHitTestVisible="False">
                            <ContentControl Style="{StaticResource CustomFlowNodeStyle}" Margin="2"/>
                            <TextBlock Text="{Binding Text}" VerticalAlignment="Center" HorizontalAlignment="Center" Foreground="{Binding ColorViewModel.LineColor,Converter={StaticResource ColorBrushConverter}}" />
                        </Grid>
                    </Grid>
                    <DataTemplate.Triggers>
                        <Trigger Property="IsMouseOver" Value="true">
                            <Setter TargetName="Border" Property="Stroke" Value="Gray"/>
                        </Trigger>
                    </DataTemplate.Triggers>
                </DataTemplate>
            </ItemsControl.ItemTemplate>
        </ItemsControl>
    </Border>
</UserControl>