WPF Diagram Designer - Part 2

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:s="clr-namespace:DiagramDesigner">

    <Style TargetType="{x:Type s:ToolboxItem}">
        <Setter Property="Control.Padding"
                Value="5" />
        <Setter Property="ContentControl.HorizontalContentAlignment"
                Value="Stretch" />
        <Setter Property="ContentControl.VerticalContentAlignment"
                Value="Stretch" />
        <Setter Property="ToolTip"
                Value="{Binding ToolTip}" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type s:ToolboxItem}">
                    <Grid>
                        <Rectangle Name="Border"
                                   StrokeThickness="1"
                                   StrokeDashArray="2"
                                   Fill="Transparent"
                                   SnapsToDevicePixels="true" />
                        <ContentPresenter Content="{TemplateBinding ContentControl.Content}"
                                          Margin="{TemplateBinding Padding}"
                                          SnapsToDevicePixels="{TemplateBinding UIElement.SnapsToDevicePixels}" />
                    </Grid>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsMouseOver"
                                 Value="true">
                            <Setter TargetName="Border"
                                    Property="Stroke"
                                    Value="Gray" />
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <Style TargetType="{x:Type s:Toolbox}">
        <Setter Property="SnapsToDevicePixels"
                Value="true" />
        <Setter Property="Focusable"
                Value="False" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate>
                    <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>
            </Setter.Value>
        </Setter>
        <Setter Property="ItemsPanel">
            <Setter.Value>
                <ItemsPanelTemplate>
                    <WrapPanel Margin="0,5,0,5"
                               ItemHeight="{Binding Path=DefaultItemSize.Height, RelativeSource={RelativeSource AncestorType=s:Toolbox}}"
                               ItemWidth="{Binding Path=DefaultItemSize.Width, RelativeSource={RelativeSource AncestorType=s:Toolbox}}" />
                </ItemsPanelTemplate>
            </Setter.Value>
        </Setter>
    </Style>

</ResourceDictionary>