Updating printers while application is running?

[Tobias Oelgarte]

I already thought about using PrintServiceLookup. I could use it to show 
the user the currently available printers, but I can't use it to create 
a javafx.print.Printer instance without reflective access (JPMS).

At the moment I'm stuck with a an unmodifiable OberservableSet that 
never updates.

On 07.06.22 21:50, Thiago Milczarek Sayão wrote:
> Hi,
>
> I use it through the javax.print API:
>
>                 ObservableList<PrintService> printServices = 
> FXCollections.observableArrayList(
> PrintServiceLookup.lookupPrintServices(null, null));
>
> Maybe it may help for now, but to me it seems it should not be static.
>
>
> Em ter., 7 de jun. de 2022 às 15:39, Tobias Oelgarte 
> <tobias.oelgarte at gmail.com> escreveu:
>
>     Is there some way to update the ObservableSet of Printers once the
>     Application is running? Calling Printer.getAllPrinters() always
>     returns
>     the same OberservableSet and it does not change - ever. [1]
>
>     We have an JavaFx based application running under Windows 10/11
>     that is
>     used to print on wireless printers, that are not always available.
>     Having to restart the the application every time a printer goes
>     away or
>     comes available is a serious pain for the users.
>
>     Is there any kind of workaround?
>
>     I doubt it will be fixed in the near future, since this comment is
>     from
>     6 years ago [2]:
>
>          // This is static. Eventually I want it to be dynamic, but first
>          // it needs to be enhanced to only create new instances where
>          // there really has been a change, which will be rare.
>
>     [1]
>     https://stackoverflow.com/questions/38470568/javafx-doesnt-detect-changes-of-available-printers
>
>     [2]
>     https://github.com/openjdk/jfx/blob/master/modules/javafx.graphics/src/main/java/com/sun/prism/j2d/PrismPrintPipeline.java#L99
>