[9] Review request for 8157002: Toggle gtk version if SWT used via FXCanvas

Tom Schindl tom.schindl at bestsolution.at
Wed Nov 23 09:38:48 UTC 2016

>From looking at the code I doubt your fix will work reliably in a
OSGi-Environment who is the Main deployment scenario for SWT and hence

For sure you won't find the SWT-Library on the SystemClassloader and
whether you find it on the Thread-ContextClassloader is just gambling!

The only area you for sure can detect the swt-library are the
swt-fx.jar-Classes because those are guaranteed to be loaded with a
classloader who can look up SWT-Libary classes like

BTW: Is the statement below really correct?

.... in JFX embeded into SWT scenarios JFX loads GTK primarily ...

If you create an instance of FXCanvas SWT must have been loaded already
(You need to pass a parent Composite) so the native gtk-libs are there
already loaded.


On 22.11.16 14:51, Semyon Sadetsky wrote:
> Hello Kevin & David,
> Please review the fix for jfx9:
> bug: https://bugs.openjdk.java.net/browse/JDK-8157002
> webrev: http://cr.openjdk.java.net/~ssadetsky/8157002/webrev.00/
> In JFX embeded into SWT scenarios JFX loads GTK primarily. So SWT GTK
> version cannot be detected using the check for the loaded native library
> version.
> The fix proposes a way to detect if GTK version of swt.jar library is
> available on the classpath and tries to get the GTK version from SWT lib
> internal java classes.
> --Semyon

Thomas Schindl, CTO
BestSolution.at EDV Systemhaus GmbH
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