Alan & Phil:
Thanks so much. I just ran a test in JDK 18 with
“apple.awt.enableTemplateImages” set to true and it works as expected.
(I realize now part of the problem was on one of my machines I was
reading JDK 14 code, but I’m not 100% sure even if I had the correct
version in front of me that I would have pieced all of this together...)
Regards,
- Jeremy
------ Original Message ------
From "Philip Race" <[email protected]>
To "alan Snyder" <[email protected]>; "Jeremy Wood"
<[email protected]>
Cc "[email protected]" <[email protected]>
Date 8/10/2022 11:41:53 AM
Subject Re: Mac Tray Icon Question
This was implemented in JDK 17 as
https://bugs.openjdk.org/browse/JDK-8252015
You need to set that property yourself and then ALL your images for
TrayIcon had better
all be template images else it will likely look very bad ..
It was done this way to avoid "accidentally" interpretation of images
as template images
Personally I wonder if the definition of template images is simple and
stable we could
just scan the images to see if they meet the criteria and then mark
them as template
images automatically .. but very clearly the developer would need to
know the rules
for template images and supply these for mac. There's nothing I can
think of which
would allow someone writing a Java app on Windows and not a mac aware
developer
to have this magically done for them ...
-phil.
On 8/10/22 7:47 AM, Alan Snyder wrote:
It appears that CTrayIcon has an option to use template images.
apple.awt.enableTemplateImages
So, either this option is off or your image does not satisfy the rules
for template images.
On Aug 10, 2022, at 7:28 AM, Jeremy Wood <[email protected]>
wrote:
I like that theory, thanks. Is it possible to make/assign a template
image in Java?
Glancing around just now didn’t turn up any leads. Specifically:
In CTrayIcon#updateNativeImage(Image), we call:
CImage.getCreator().createFromImage(image, observer)
… and that method appears to convert ‘image’ (a java.awt.Image) into
a TYPE_INT_ARGB_PRE formatted int array. The word “template” isn’t in
the CImage class at all. So even if I had the imagePtr I don’t see
how I can toggle the template attribute.
Regards,
- Jeremy
------ Original Message ------
From "Alan Snyder" <[email protected]>
To "Jeremy Wood" <[email protected]>
Cc "[email protected]" <[email protected]>
Date 8/10/2022 8:25:11 AM
Subject Re: Mac Tray Icon Question
I suspect the images that work are template images, rather than
pairs of images.
See
https://developer.apple.com/documentation/appkit/nsimage/1520017-template
On Aug 9, 2022, at 7:12 PM, Jeremy Wood <[email protected]>
wrote:
On Macs the tray can present black or white icons, depending on the
color of the desktop underneath the menubar.
For example:
<galpmnvf.png>
<qtqoidmn.png>
Most icons switch from a black icon to a white icon as needed. A
few 3rd party app icons do not switch to a white icon against the
black background (for ex: Evernote). And interestingly: Apple’s
Airdrop icon (the concentric circles shaped like a sideways pacman)
also appears to do the wrong thing too.
Is there a way in a Java desktop app to set up a tray icon that can
toggle between white and black icons as needed?
Obviously we’d love it if this “just worked” without further
intervention by inverting our icon, but we’d also be happy if a
solution involved adding a PropertyChangeListener somewhere to
identify the menubar change and we could update the tray icons
ourselves.
For ex:
If I change the highlight/accent color (in “System Preferences ->
General”), then 8 UIManager Colors change (including
“textHighlight”, “Button.light”, etc.) as of JDK 18. As far as I
can tell: there is no similar model to identify when the menubar
changes colors.
For now we’ve made a work-around by using the Robot class to grab a
pixel from the Apple menu icon every few seconds to determine if
it’s light or dark.
Is there an existing way to resolve this we don’t know about?
Or if not: is anyone reading this with “author” status interested
in helping write this up as an openjdk bug?
Regards,
- Jeremy
