On Wed, 2 Dec 2020 20:05:03 GMT, Kevin Rushforth <k...@openjdk.org> wrote:
>> This is a proposed fix for the bug where the Apple system menubar is >> initially non-responsive on macOS 10.15 and later after a JavaFX application >> has started up. The end user can workaround this by switching to some other >> application and then back to the JavaFX app, but there is no known >> workaround that the application developer can use. >> >> JavaFX is using a non-standard approach to creating the system menus, and >> seems likely that some change in macOS 10.15 means that this no longer works >> the same as in previous versions of macOS. We have had problems with >> application startup on macOS in the past that affected the system menubar: >> see [JDK-8123430](https://bugs.openjdk.java.net/browse/JDK-8123430) and >> [JDK-8093743](https://bugs.openjdk.java.net/browse/JDK-8093743). >> >> The solution is to deactivate and then reactivate the application after the >> app has initially been made active, but before any window is initialized and >> before the system menu is populated. >> >> I pushed this as two commits: one with the fix and one with some temporary >> verbose debug print statements. I will remove the print statements prior to >> the formal review, but wanted to leave them in for now in case someone >> wanted to test them, and ran into an issue (the debug print statements could >> help isolate any problems). >> >> I have tested this on macOS 10.14, 10.15, and 11 (Big Sur). It will need >> additional testing. >> >> The only drawback I see with this approach is that there can be a very brief >> flash when launching the JavaFX app from a terminal window as the FX >> application activates, deactivates, and reactivates. > > I note that this does not seem to be a problem for Swing apps. AWT uses the > Java Runtime Support (JRS) framework to initialize the application and > menubar. Note to testers: `JFXPanel` applications deadlock with this fix. I need to check whether glass is being started up for a normal Taskbar application, and not being embedded in an `FXCanvas` or `JFXPanel`. ------------- PR: https://git.openjdk.java.net/jfx/pull/361
