如何在UWP上适当地调整应用大小以使其可见范围？ （VisibleBoundsMode似乎不起作用）

Question

I have two UWP apps and after testing them out with Continuum I noticed the app bar of the OS (the bar with the Start button) at the bottom of the screen (it can be at each of the 4 edges of the screen, of course) was covering part of my app.

Now, I'm already using ApplicationView.GetForCurrentView().SetDesiredBoundsMode(ApplicationViewBoundsMode.UseVisible) before calling Window.Current.Activate() , but that doesn't seem to solve the issue.

1) Why is it that setting the DesiredBoundsMode property doesn't seem to work here? Shouldn't that automatically resize the window content to the visible bounds (ie. excluding system overlays like the navigation bar or the app bar)?

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The workaround I'm using for now on Windows 10 Mobile devices is to subscribe to the VisibleBoundsChanged event and then manually adjust the margins of my Window.Current.Content item to make sure it doesn't show anything behind covered areas of the screen.

Basically, I use the Window.Current.Bounds property and the ApplicationView.VisibleBounds property to calculate the occluded areas on the different edges of the app window, and increase the margins from there.

2) Is there a proper/better way to do this? I mean, I'm quite sure there's another method that should be used to avoid this issue (considering there are tons of different situations like Continuum, navigation bar etc... that I don't think are supposed to be manually handled one by one).

Thank you for your help!

Answer 1

Use the subscription to the event VisibleBoundsChanged. This is the best solution that I found.

        var curr = ApplicationView.GetForCurrentView();
        if (curr.IsFullScreenMode == true)
        {
            ApplicationView.PreferredLaunchWindowingMode = ApplicationViewWindowingMode.FullScreen;
            curr.FullScreenSystemOverlayMode = FullScreenSystemOverlayMode.Minimal;
        }
        else
        {
            ApplicationView.PreferredLaunchWindowingMode = ApplicationViewWindowingMode.Auto;
            curr.FullScreenSystemOverlayMode = FullScreenSystemOverlayMode.Standard;
        }