WPF Trigger animation when Visibility is changed?

Question

Well i have a custom control and when Visibility is changed to Visible i have a trigger with a enter/exit action but the problem is that when the exit action fires the Visibility is no longer Visible so the animation can't be seen how would i fix this?

here is my trigger:

            <ControlTemplate.Triggers>
                <Trigger Property="Visibility" Value="Visible">
                    <Trigger.ExitActions>
                        <BeginStoryboard Storyboard="{StaticResource Hide}"/>
                    </Trigger.ExitActions>
                    <Trigger.EnterActions>
                        <BeginStoryboard Storyboard="{StaticResource Show}"/>
                    </Trigger.EnterActions>
                </Trigger>
            </ControlTemplate.Triggers>

Answer 1

Hi Petoj :)

That's right. Tricky stuff. I'd solve this problem with attached properties + value coercion. Take a look here: WPF Fade Animation.

Hope this helps.

Cheers, Anvaka.

Answer 2

I tried this too and failed. I think it is not possible to accomplish this in a simple ControlTemplate with a Trigger on the Visibility property. What you can do is add an Opacity animation From 1 To 0 to a Trigger for a different property, for instance a Dependency property that you add in the code behind yourself.