how to start animation using MVVM?

I am converting my exising Application using WPF and MVVM pattern. I have different storyboards in my开发者_如何学Go view .

eg. 1. showing splashscreen while loading the app 2. while clicking Menu Toggle button/Radio Button to show the slide in and Slide out animation effect 3. And different mouseover effect for different elements available in the View.

How will i call the storyboard using MVVM and which is the best method?. To show the mouse over effect do we really have to use MVVM or code behind?

For question 1, I'm not sure your requirements, or the best way to do this, but one idea is you can use code similar to #3 below, but replace <EventTrigger RoutedEvent="Mouse.MouseEnter"> with <EventTrigger RoutedEvent="Window.Loaded">

To answer question 2, Here is how I begin a storyboard when a user changes a radio button. This is all in XAML:

<CheckBox Content="Radio Button Option 1" >
     <i:Interaction.Triggers>
          <i:EventTrigger EventName="Checked">
               <im:ControlStoryboardAction Storyboard="{StaticResource NameOfStoryboardToRunOnCheck}"/>
          </i:EventTrigger>
          <i:EventTrigger EventName="Unchecked">
               <im:ControlStoryboardAction Storyboard="{StaticResource NameOfStoryboardToRunOnUnCheck}"/>
          </i:EventTrigger>
     </i:Interaction.Triggers>
</CheckBox>

For Question 3, here is an example of OnMouseOver

<UserControl.Triggers>
     <EventTrigger RoutedEvent="Mouse.MouseEnter">
          <BeginStoryboard Storyboard="{StaticResource MouseOverStoryboard}" />
     </EventTrigger>
     <EventTrigger RoutedEvent="Mouse.MouseLeave">
          <BeginStoryboard Storyboard="{StaticResource MouseLeaveStoryboard}" />
     </EventTrigger>
</UserControl.Triggers>