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Better Way to "Wait"? RRS feed

  • Question

  • I have 2 media elements on top of one another to run a slide show. One fades the picture in, the other fades the picture out making a kind of fade transition between the two. I was running into a problem where there was a blink in the in the transition because it was taking a moment for the new picture to load so the two fades were out of sync, so to speak.

    I created this:

        Async Function WaitPic() As Task
            Await Task.Delay(2000)
        End Function
    

    And called it right after loading the new picture:

            PicIn.Source = New Uri(Me.LstSlideShow1.SelectedItem)
            Await WaitPic() 'a delay to wait for the picture to load, otherwise there's a blink in the fading of the two
    

    This is working on a couple of different computers but I'm guessing I could potentially have the same problem if there is any kind of delay in loading the picture, so I'm looking for a better way.

    Is there a way to wait for the loading of the picture or for the completion of a DoubleAnimation?

    Thank you,
    Ken

    Monday, December 24, 2018 4:59 AM

All replies

  • Maybe you should set the Source properties, than start the transition when both of the media elements received the MediaOpened event. The controls can be initially invisible.

    • Edited by Viorel_MVP Monday, December 24, 2018 5:55 AM
    Monday, December 24, 2018 5:52 AM
  • Hi,

    Is it a WPF project  or a Winform project?

    Best Regards,

    Alex


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    Monday, December 24, 2018 9:53 AM
  • Sorry, Alex, WPF.

    Hmmm, hadn't noticed the media opened event. Maybe I could use that to set a flag and simply loop watching for the flag to set after setting the source? Might just work!

    I'll check it out.

    Thanks very much!

    Monday, December 24, 2018 1:36 PM