CODEWITHSUNDEEP
silverlightwindows-phone-7
Naximus
Naximus

Reputation: 609

WP7 - Are transition animations allowed while navigating back (user press back button) from a page?

As per the certification requirements:

Pressing the Back button must return the application to the previous page.

But to go back to the previous page i will have to cancel the navigation first to do the transition animation. Can such an app pass certification? Because i fear that if the app is statically checked then it might fail if it finds e.Cancel = true in OnBackKeyPress.

Upvotes: 1

Views: 627

Answers (2)

Amr H. Abd Elmajeed
Amr H. Abd Elmajeed

Reputation: 1521

Yes it will pass the certification.

My app passed the certification, and i handle the back button to make custom animations between pages.

I use e.cancel in the back button handler, start my transition, and call goback() in the transition finished event.

The new silverlight toolkit release has some nice animations you can add using xaml only, without handling the back button, but i haven't tried it out yet.

Upvotes: 1

Lukasz Madon
Lukasz Madon

Reputation: 14994

Yes apps are statically checked and yes it will pass the cert with this line of code. I have it in my code.

For example a game can show some popup (options, pause etc.) and it should be closed by the back button.

    //navigate to the start page
    protected override void OnBackKeyPress(System.ComponentModel.CancelEventArgs e)
    {
        if (m_stateOfGame == GameState.end)
        {
            base.OnBackKeyPress(e);
            return;
        }

        e.Cancel = true;

        if (m_popUpOpen)
        {
            this.ClosePopup();
            this.GameStateUpdate();
            m_stateOfGame = GameState.resume;
            m_popUpOpen = false;
        }
        else
        {
            m_stateOfGame = GameState.pause;
            this.GameStateUpdate();
            ShowPopup();
            m_popUpOpen = true;
        }
    }

A rule of thumb says that the transition animation should take ~400ms and the maxium is 1000ms.

Upvotes: 0

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