storyboard HandoffBehavior? RSS

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  dmacdonald

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  storyboard HandoffBehavior?

  Jul 01, 2009 11:21 PM | LINK

  Hi, 

   I'm trying to animate the opacity of an element so that it smoothly fades in and out when the mouse enters or leaves it. This is very simple in WPF using the HandoffBehavior property. I'm it this manually for each animation in code-behind for now but its ugly. Is there a simple way in xaml?

   Thanks,

  Daniel
  

   
  

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  elmore.adam

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  Re: storyboard HandoffBehavior?

  Jul 03, 2009 07:48 PM | LINK

  Daniel, Silverlight has a superior way of handling these type of state animations through the VisualStateManager (in fact, WPF 4 will be following suite and implementing the VSM). Granted, there is a bit of initial work that will need to be done to give you the control that you desire; namely, you will need to override the control template of the particular element you wish to implement these animations on. However, it is a powerful way to accomplish this sort of thing at a control level.
  
  Examine the following ControlTemplate (targeted at a Button control), and see if this doesn't point you in the correct direction:
  
  

  <ControlTemplate

      TargetType="Button">

      <Grid

          x:Name="PART_RootElement">

          <VisualStateManager.VisualStateGroups>

              <VisualStateGroup

                  x:Name="CommonStates">

                  <VisualState

                      x:Name="Normal" />

                  <VisualState

                      x:Name="MouseOver">

                      <Storyboard>

                          <DoubleAnimation

                              Storyboard.TargetName="TargetElementName"

                              Storyboard.TargetProperty="Opacity"

                              To=".5" />

                      </Storyboard>

                  </VisualState>

              </VisualStateGroup>

          </VisualStateManager.VisualStateGroups>

  --
  Kind Regards
  
  Adam Elmore
  MCTS: WPF, WCF
  
  417.200.4261
  elmore.adam@gmail.com
  http://adamelmore.net/