[gui] Weird Behaviour on hover

[realyukii]

Issue details

when I browse the decompiled project, an unexpected popup keeps appearing:

Jadx version

1.4.7

Java version

20.0.2

OS

• Windows
• Linux
• macOS

[realyukii]

Restarting the jadx-gui solved this issue, but I'm still wondering what's actually happened.

[realyukii]

It's a little bit annoying when I need to restart frequently when this bug appears :(
@skylot any suggestion?

[jpstotz]

The first question is if this is a system specific bug (e.g. Java 20 bug) or if this is triggered by some unusual code in the app you have decompiled. In both screenshots you have loaded the same APK, have you encountered this problem also with other APKs?

If it is Java related you could try latest Jadx version with integrated Java (which is Java 19). Or you can test latest Jadx unstable version.

[skylot]

@Reyuki-san it looks like tooltip rendering issue. There are several similar reports (#1401, #1867), but I still not sure what causing it and how to fix this. Also, I can't reproduce it 😭

I can suggest trying to check latest unstable build (both with bundled jre and without).
Maybe issue was in FlatLaf lib and was fixed already, also might worth trying switching to default theme.

As a last resort, I can add an option to disable tooltips in code area to check if it was a cause.

[realyukii]

Thanks for the response, I will try your advice if the bug shows up again and give the feedback
unfortunately now the bug occurs infrequently, so at this time I did not change the jadx version or try to decompile another apk.

[kotori2]

I think it's a Java issue rather than Jadx. I can reproduce this glitch on many Java desktop applications (BurpSuite etc.). This issue can be triggered if you are using a high-end monitor (4K resolution with 200% scaling).
I found this solution from BurpSuite community, and it does solve the issue for Jadx:
Simply append "-Dsun.java2d.noddraw=true" "-Dsun.java2d.d3d=false" "-Dswing.useflipBufferStrategy=True" "-Dsun.java2d.ddforcevram=true" "-Dsun.java2d.ddblit=false" to the end of set DEFAULT_JVM_OPTS= in jadx-gui.bat.