Zoom functionality in media player element: Linking derived media transport controls and media player element

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  I want to add zoom functionality for media player element(UWP C#) . I placed MediaPlayerElement inside a scroll viewer and zoom functionality is working. But inbuilt media transport transport controls is also getting zoomed and scrolled.
  To avoid this I created a derived transport control as described in https://docs.microsoft.com/en-us/windows/uwp/design/controls-and-patterns/custom-transport-controls#create-a-derived-control
  I assume instead of using inbuilt transport controls and instead use the derived transport control(added outside the scroll viewer)  I can have a zoom feature for media player element.
  <Grid>
      <ScrollViewer HorizontalScrollBarVisibility="Hidden"
                    VerticalScrollBarVisibility="Hidden"
                    MinZoomFactor="1" 
                    ZoomMode="Enabled">
          <MediaPlayerElement Stretch="Uniform"
                              AreTransportControlsEnabled="False"
                              />
      </ScrollViewer>
      <DerivedTransportControls VerticalAlignment="Bottom"
                           HorizontalAlignment="Stretch"
                           />
  </Grid>
  
  How do I link the DerivedTransportControls with the media player element(so that if I press pause button in my derived control, it automatically pauses the media player.Similar to how the inbuilt controls work)
  I tried linked derived media transport controls with media player element as below.
  mpe.TransportControls = derivedmtc;  
  The above causes an exception: System.ArgumentException: 'Value does not fall within the expected range.' Am I missing something?
  Is it possible to link derived media transport controls with a media player element. Otherwise it seems I have to implement my own custom transport controls and all the features(like auto hide, seek bar etc)

  • Moved by Drake_WuMicrosoft contingent staff Friday, January 17, 2020 7:19 AM

  Sunday, January 5, 2020 8:58 PM