<AWT Dev> RFR: 8252015: [macos11] java.awt.TrayIcon requires updates for template images

[Sergey Bylokhov]

On Fri, 2 Oct 2020 11:08:23 GMT, Peter Zhelezniakov <peterz at openjdk.org> wrote:

> [JDK-8252015: [macos11] java.awt.TrayIcon requires updates for template
> images](https://bugs.openjdk.java.net/browse/JDK-8252015)
> ### Problem
> According to Apple's human interface guidelines, developers should use template images for tray icons. This way icons
> look good when desktop theme or wallpaper change. On the API level, this means setting the `NSImage::isTemplate` flag.
> Currently there's no way in Java to set this flag. Even if one uses a template (black and transparent pixels only)
> image, MacOS will treat it as regular image. As a result, the image will not be visible when using dark theme.  ###
> Solution:
> * If `sun.awt.enableTemplateImages` property is set, all tray icon images are treated as templates. It's the developers'
>   responsibility to ensure their images are indeed templates. This property allows us to avoid new API and accidental
>   behavior changes
> * Value of this property is passed from Java into `NSImage::setTemplate`
> * We need the tray icon image rendered by MacOS, so we use a button (rather than a view) to host the image

Hi, Peter. You are welcome!
Just an initial question about the template images, can you please provide some steps to reproduce this bug and so it
will be possible to check that the fix solves it.

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PR: https://git.openjdk.java.net/jdk/pull/481