|ZYCWPF| 用户自定义控件，如何给我原来RichTextBox添加事件?
我定义了
public partial class ZRichTextBox : RichTextBox
这个用户控件

    <Style TargetType="{x:Type control:ZRichTextBox}">

        <Setter Property="Template">

            <Setter.Value>

                <ControlTemplate TargetType="{x:Type control:ZRichTextBox}">

                    <DockPanel LastChildFill="True">

                        <Border DockPanel.Dock="Top" SnapsToDevicePixels="True"

                            BorderBrush="{TemplateBinding ToolbarBorderBrush}"

                            BorderThickness ="{TemplateBinding ToolbarBorderThickness}">

                            <StackPanel Height="24" Orientation="Horizontal"

                                Background="{TemplateBinding ToolbarBackground}">

                            .....这里为我的工具栏按钮

                            </StackPanel>

                        </Border>

                        <ScrollViewer x:Name="PART_ContentHost" VerticalScrollBarVisibility="Auto"  HorizontalScrollBarVisibility="Auto">

                        </ScrollViewer>

                    </DockPanel>

                </ControlTemplate>

            </Setter.Value>

        </Setter>

    </Style>

那我现在要给我的RichTextBox添加MouseLeftButtonUpEvent
我在代码中的话可以用:
        public ZRichTextBox()
        {
this.AddHandler(RichTextBox.MouseLeftButtonUpEvent, new RoutedEventHandler(RichTextMouseClick), true);
        }

但我现在是用MVVM方式写的，要如何进行绑定
        public