C＃UWP MediaPlayerElement交互模式事件？

Question

Microsoft Player Framework had an event for OnIsInteractiveChanged so we could determine if the controls were being displayed. I can't seem to find a similar event for MediaPlayerElement. Is there a similar event that gets fired when the controls visible?

Answer 1

s there a similar event that gets fired when the controls visible?

Currently, there is no such event to determine if the controls were being displayed. It only provide a simple way to manage this with one new property ShowAndHideAutomatically and two new methods Show() and Hide() .

If you do want this feature you could custom MediaTransportControls and create a timer to determine the controls were being displayed.

You will found ControlPanelFadeIn storyboard to make the controls fade in. If control panel fade in, the ControlPanel_ControlPanelVisibilityStates_Border opacity will turn to 0. So you could create a timer to determine this value.

public sealed class CustomMediaTransportControls : MediaTransportControls
{
    private DispatcherTimer KeepTransportControlsVisibleTimer;
    private Border ControlPanelGrid;

    public CustomMediaTransportControls()
    {
        this.DefaultStyleKey = typeof(CustomMediaTransportControls);
        KeepTransportControlsVisibleTimer = new DispatcherTimer();
        KeepTransportControlsVisibleTimer.Interval = TimeSpan.FromMilliseconds(200);
        KeepTransportControlsVisibleTimer.Tick += KeepTransportControlsVisibleTimer_Tick;
        KeepTransportControlsVisibleTimer.Start();
    }

    private void KeepTransportControlsVisibleTimer_Tick(object sender, object e)
    {
        var opacity = ControlPanelGrid.Opacity;
        System.Diagnostics.Debug.WriteLine(opacity);
         // do some stuff
    }  

    //overriding OnApplyTemplate
    protected override void OnApplyTemplate()
    {
        ControlPanelGrid = GetTemplateChild("ControlPanel_ControlPanelVisibilityStates_Border") as Border; 
        base.OnApplyTemplate();  
    }
}

For creatting custom transport controls, please check this .