Popup windows don't work in weston kiosk mode

[Christopher Schnick]

Over the last few days, I have been experimenting with the new Android 
Linux terminal: 
https://www.zdnet.com/article/how-to-use-the-new-linux-terminal-on-android/. 
It uses a somewhat customized weston wayland setup in kiosk mode to make 
it work on the phone screen.

JavaFX applications run fine on it, and the performance is actually 
decent. The only thing that does not work are PopupMenus. They don't 
register mouse clicks (the events sent are normal mouse events, so no 
touchscreen mode here). The system is designed for a touchscreen, so 
there are no mouse move events or anything like that sent. Only mouse 
button events are sent. When using the actual phone touch screen, it 
also only sends mouse button events.

When clicking on any popup menu, it just closes without registering the 
click. The only exception when it works is if the parent node of the 
popup window is behind the click location. I recorded a video to 
showcase the problem. The only time the click registers is at the end 
when the button that opens the menu is behind the open PopupMenu where 
it is clicked. The "Set default" menu item works one time if it is 
clicked right on top of the "..." button, but does not work if the click 
location does not hit the "..." button.

If anyone has an idea of what to do with this problem, let me know. I 
can test things, I just don't know how one would get started 
troubleshooting this issue.

Best
Christopher Schnick
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