How to programmatically respond to Snap in Windows 8 Metro

Question

Is there a way to respond to Snap in C# in a Metro app? When one of the pages is snapped I need to show another one. My idea is to respond to snap by naviating to another page.

I found

var currentView = ApplicationLayout.GetForCurrentView();
currentView.LayoutChanged += new TypedEventHandler<ApplicationLayout, ApplicationLayoutChangedEventArgs>(currentView_LayoutChanged);

but it looks like it no longer works in Consumer Preview. Is there another way?

Answer 1

In Release Preview you need to react to a different event, again :) It's SizeChanged now, not ViewStateChanged.

Previously, your app would do something like this to handle view state changes:

using Windows.UI.ViewManagement;

// Register for the viewstatechanged event
ApplicationView.GetForCurrentView().ViewStateChanged += ViewStateChanged;    

private void ViewStateChanged(ApplicationView sender, ApplicationViewStateChangedEventArgs e)
{
     // Obtain view state from event payload
     ApplicationViewState myViewState = e.ViewState; 
}

Now apps should do this:

using Windows.UI.ViewManagement;

// Register for the window resize event
Window.Current.SizeChanged += WindowSizeChanged;     

private void WindowSizeChanged(object sender, Windows.UI.Core.WindowSizeChangedEventArgs e)
{
    // Obtain view state by explicitly querying for it
    ApplicationViewState myViewState = ApplicationView.Value;
}

More info here