UWP AcrylicBrush HostBackdrop cause Color Changes when Window loses focus

Question

I have Grid whose Background will be altered according to the color of album art at the run time. And I change the Background using the following code:

        return new AcrylicBrush()
        {
            BackgroundSource = AcrylicBackgroundSource.HostBackdrop,
            TintOpacity = 0.75,
            TintColor = Color.FromArgb(bgra[3], bgra[2], bgra[1], bgra[0])
        };

However, the HostBackdrop is causing the trouble for me. As you can see from the images I post below, the background turns white it loses focus. It is normal when the window has focus. And when I change the HostBackdrop to Backdrop, the color no longer changes. But I do want to use HostBackdrop.

How can I achieve that? Thanks in advance!

score 1 · Accepted Answer · answered Aug 26 '19 at 07:27

1

Currently AcrylicBrush only works when the window gets focus, you can view the document with a description of this

If you need to set the color of the AcrylicBrush when the window loses focus, you can use the FallbackColor property.

Best regards.

answered Aug 26 '19 at 07:27

Richard Zhang

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Thank you! Problem solved! Could you please look at my other unanswered questions? – Aug 26 '19 at 08:25
Thank you for your mark, my companion is researching your question, reply will be soon. – Richard Zhang Aug 26 '19 at 08:58
I really appreciate your helpfulness. Could you take a look at this [one](https://stackoverflow.com/questions/57478990/uwp-visualstatemanager-pointerover-does-not-work)? – Aug 26 '19 at 12:03

UWP AcrylicBrush HostBackdrop cause Color Changes when Window loses focus

1 Answers1