Menubar not responding correctly to mouse inputs

[rp181135198]

Description
When I click on any menubar item, It shows me the dropdown menu till I relase the mouse button. Once I relase the mouse button, the dropdown menu disappears.

Steps to reproduce

1. Create new 'Class Diagram' diagram
2. Click on 'File' (or any menubar item) and keep mouse button pressed
3. Relase the mouse button
4. See error

Screenshots

1. Click on 'File' (or any menubar item) and keep mouse button pressed
   

2. Relase the mouse button
   

Configuration

• JetUML Release: jetuml 3.3 from aur package
• OS: Manjaro Linux x86_64
• Kernel: 5.10.68-1-MANJARO
• DE: KDE Plasma 5.22.5
• Java: jdk-openjdk 16.0.2.u7-1

Additional information
I can't select any option from dropdown menu but keybord shortcuts are working fine.

[prmr]

Hi, thanks for reporting this bug. Could you please confirm that after clicking on the menu item, you do not drag the mouse below the menu item. Because it's standard JavaFX behavior to clear the menu if you click-then-drag. To pin the menu, you have to just click.

[rp181135198]

Hi @prmr,
Actually I have tried both with dragging and without dragging my mouse but I got the same result.

Below is some results that you may find helpful..

• Right click on File (and without dragging) released the mouse button
  => Drop-down menu disappear

• Right click on File, drag mouse arrow to any drop-down menu option and release the mouse button
  => Drop-down menu disappear and No command executed

• Right click on File, drag mouse arrow to any drop-down menu option and Left click
  => Drop-down menu disappear and No command executed

• Right click on File and without releasing mouse button, used up and down arrow key to select any option from drop-down menu and hit Enter key
  => Drop-down menu disappear and Selected command executed ✔️

• Used Alt+F and then without releasing any key, used up and down key to select any option from drop-down menu and hit Enter key
  => Drop-down menu disappear and Selected command executed ✔️

[prmr]

Thanks. These issues seem to be Linux-specific. We currently don't have a contributor on Linux, but I'll leave the issue open so we can look into it in the future.

[prmr]

Have you tried with Java 17?

[prmr]

Can't reproduce the issue on Linux Mint 21.1. Was probably due to an incompatible JDK.