B4J Question Java command difference in graphics in the region project attributes area definition

[rspitzer]

I am trying to understand a difference in commands. In one of your posts about running Java on the raspberry PI, you posted the following command #VirtualMachineArgs: -Djavafx.platform=monocle to be placed in the project attribute area. I tried this out, and found (not a bad thing, but rather a good thing here) in the program I am writing, which has a qwerty key board layout for user input started in two different ways, depending on whether I remarked out the #VirtualMachineArgs: -Djavafx.platform=monocle line.

This image is has the#VirtualMachineArgs: -Djavafx.platform=monocle remarked out.

This image is has the #VirtualMachineArgs: -Djavafx.platform=monocle not remarked out.

I love the result, it gives a better cursor placement holder automatically on the screen, remind me of the old margin adjusts on old typewriter.
My question is why does this happen, what does the added line do?

 

[Erel]

There are several rendering engines in JavaFX, depending on the platform and JavaFX package.

This line sets a specific engine instead of the default one.

These pictures are from RPi 4?

 

[rspitzer]

No these images are from the RPi 3. Is there a list of different rendering engines? Curious.

 

[Erel]

There is no such list. It depends on the JavaFX package that you are using. In most cases it is best to use the default one.

 

[rspitzer]

Asked and answered.