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xamlwindows-store-appswinrt-xaml

Windows Store Apps: animate control when visibility changes?

In my app I have A grid with visibility bound to a property in the view model.

What I want to do is when the visibility property changes at the view model, the grid fades in or out according to the visibility value: Visible/Collapsed.

how can I achieve this ?

Solution

  • You need a new DependencyProperty, either by inheriting from Grid and adding one or by creating an attached property. Let's call it DeferredVisibility and let it be of type Visibility.

    When DeferredVisibility is changed to Visible, set the Visibility to Visible and animate the opacity from 0 to 1.

    When DeferredVisibility is changed to Collapsed, animate the opacity from 1 to 0 and THEN set the Visibility to Collapsed.