ListBoxItem Style preserve MouseOver and Selected Style

I have a ListBox where I want to display the current State with a colored Rectangle sliding out.

When The Item is Selected or MouseOver the Recangle should extend otherwise it should shrink.

<ControlTemplate.Resources>
    <Storyboard x:Key="MoveOutStoryboard">
        <DoubleAnimation To="175"
                    Storyboard.TargetProperty="Width"
                    Storyboard.TargetName="AnimatingGrid">
            <DoubleAnimation.EasingFunction>
                <QuinticEase EasingMode="EaseOut" />
            </DoubleAnimation.EasingFunction>
        </DoubleAnimation>
        <ColorAnimation Storyboard.TargetName="ContentPresenter"
                Storyboard.TargetProperty="(TextElement.Foreground).(SolidColorBrush.Color)"
                To="White" />
    </Storyboard>

    <Storyboard x:Key="MoveInStoryboard">
        <DoubleAnimation To="16"
                    Storyboard.TargetProperty="Width"
                    Storyboard.TargetName="AnimatingGrid">
            <DoubleAnimation.EasingFunction>
                <QuinticEase EasingMode="EaseOut" />
            </DoubleAnimation.EasingFunction>
        </DoubleAnimation>
        <ColorAnimation Storyboard.TargetName="ContentPresenter"
                Storyboard.TargetProperty="(TextElement.Foreground).(SolidColorBrush.Color)"
                To="Black" />
    </Storyboard>
</ControlTemplate.Resources>

As there is no 'or' Multitrigger I figured out the following Trigger:

<ControlTemplate.Triggers>
    <Trigger Property="IsMouseOver" Value="True">
        <Trigger.EnterActions>
            <BeginStoryboard Storyboard="{StaticResource MoveOutStoryboard}" />
        </Trigger.EnterActions>
    </Trigger>

    <Trigger Property="IsSelected" Value="True">
        <Trigger.EnterActions>
            <BeginStoryboard Storyboard="{StaticResource MoveOutStoryboard}" />
        </Trigger.EnterActions>
    </Trigger>

    <MultiTrigger>
        <MultiTrigger.Conditions>
            <Condition Property="IsMouseOver" Value="False" />
            <Condition Property="IsSelected" Value="False" />
        </MultiTrigger.Conditions>

        <MultiTrigger.EnterActions>
            <BeginStoryboard Storyboard="{StaticResource MoveInStoryboard}" />
        </MultiTrigger.EnterActions>
    </MultiTrigger>
</ControlTemplate.Triggers>

But Somehow the MoveOutStoryboard is never called when I have the last MultiTrigger set, but I cannot figure out why.

Thanks for yor help.

since another animation can not take control over a property unless started by the same trigger, so give this a try

            <Trigger Property="IsMouseOver"
                     Value="True">
                <Trigger.EnterActions>
                    <BeginStoryboard Storyboard="{StaticResource MoveOutStoryboard}" />
                </Trigger.EnterActions>
                <Trigger.ExitActions>
                    <BeginStoryboard Storyboard="{StaticResource MoveInStoryboard}" />
                </Trigger.ExitActions>
            </Trigger>
            <Trigger Property="IsSelected"
                     Value="True">
                <Trigger.EnterActions>
                    <BeginStoryboard Storyboard="{StaticResource MoveOutStoryboard}" />
                </Trigger.EnterActions>
                <Trigger.ExitActions>
                    <BeginStoryboard Storyboard="{StaticResource MoveInStoryboard}" />
                </Trigger.ExitActions>
            </Trigger>

if you face the issue with mouse over and IsSelected then use this

            <Trigger Property="IsMouseOver"
                     Value="True">
                <Trigger.EnterActions>
                    <RemoveStoryboard BeginStoryboardName="moveIn2" />
                    <RemoveStoryboard BeginStoryboardName="moveOut2" />
                    <BeginStoryboard x:Name="moveOut1"
                                     Storyboard="{StaticResource MoveOutStoryboard}" />
                </Trigger.EnterActions>
                <Trigger.ExitActions>
                    <RemoveStoryboard BeginStoryboardName="moveIn2" />
                    <RemoveStoryboard BeginStoryboardName="moveOut2" />
                    <BeginStoryboard x:Name="moveIn1"
                                     Storyboard="{StaticResource MoveInStoryboard}" />
                </Trigger.ExitActions>
            </Trigger>
            <Trigger Property="IsSelected"
                     Value="True">
                <Trigger.EnterActions>
                    <RemoveStoryboard BeginStoryboardName="moveIn1" />
                    <RemoveStoryboard BeginStoryboardName="moveOut1" />
                    <BeginStoryboard x:Name="moveOut2"
                                     Storyboard="{StaticResource MoveOutStoryboard}" />
                </Trigger.EnterActions>
                <Trigger.ExitActions>
                    <RemoveStoryboard BeginStoryboardName="moveIn1" />
                    <RemoveStoryboard BeginStoryboardName="moveOut1" />
                    <BeginStoryboard x:Name="moveIn2"
                                     Storyboard="{StaticResource MoveInStoryboard}" />
                </Trigger.ExitActions>
            </Trigger>

also remove the multitrigger, that may not be necessary, or you can combine the remove storyboard approach in with your approach, that should work too.

---

EDIT

here is your approach with the RemoveStoryboard, this is working, I tested too

    <ControlTemplate.Triggers>
        <Trigger Property="IsMouseOver"
                    Value="True">
            <Trigger.EnterActions>
                <RemoveStoryboard BeginStoryboardName="multi" />
                <RemoveStoryboard BeginStoryboardName="sel" />
                <BeginStoryboard x:Name="over"
                                    Storyboard="{StaticResource MoveOutStoryboard}" />
            </Trigger.EnterActions>
        </Trigger>

        <Trigger Property="IsSelected"
                    Value="True">
            <Trigger.EnterActions>
                <RemoveStoryboard BeginStoryboardName="multi" />
                <RemoveStoryboard BeginStoryboardName="over" />
                <BeginStoryboard x:Name="sel"
                                    Storyboard="{StaticResource MoveOutStoryboard}" />
            </Trigger.EnterActions>
        </Trigger>

        <MultiTrigger>
            <MultiTrigger.Conditions>
                <Condition Property="IsMouseOver"
                            Value="False" />
                <Condition Property="IsSelected"
                            Value="False" />
            </MultiTrigger.Conditions>

            <MultiTrigger.EnterActions>
                <RemoveStoryboard BeginStoryboardName="sel" />
                <RemoveStoryboard BeginStoryboardName="over" />
                <BeginStoryboard x:Name="multi"
                                    Storyboard="{StaticResource MoveInStoryboard}" />
            </MultiTrigger.EnterActions>
        </MultiTrigger>
    </ControlTemplate.Triggers>   

or this, but this may be buggy and you can see some snaps in animation

    <ControlTemplate.Triggers>
        <Trigger Property="IsMouseOver"
                    Value="True">
            <Trigger.EnterActions>
                <BeginStoryboard x:Name="over"
                                    Storyboard="{StaticResource MoveOutStoryboard}" />
            </Trigger.EnterActions>
            <Trigger.ExitActions>
                <RemoveStoryboard BeginStoryboardName="over" />
            </Trigger.ExitActions>
        </Trigger>

        <Trigger Property="IsSelected"
                    Value="True">
            <Trigger.EnterActions>
                <BeginStoryboard x:Name="sel"
                                    Storyboard="{StaticResource MoveOutStoryboard}" />
            </Trigger.EnterActions>
            <Trigger.ExitActions>
                <RemoveStoryboard BeginStoryboardName="sel" />
            </Trigger.ExitActions>
        </Trigger>

        <MultiTrigger>
            <MultiTrigger.Conditions>
                <Condition Property="IsMouseOver"
                            Value="False" />
                <Condition Property="IsSelected"
                            Value="False" />
            </MultiTrigger.Conditions>

            <MultiTrigger.EnterActions>
                <BeginStoryboard x:Name="multi"
                                    Storyboard="{StaticResource MoveInStoryboard}" />
            </MultiTrigger.EnterActions>
            <MultiTrigger.ExitActions>
                <RemoveStoryboard BeginStoryboardName="multi" />
            </MultiTrigger.ExitActions>
        </MultiTrigger>
    </ControlTemplate.Triggers>