Drag and Drop working differently in Java 11 vs Java 8

by

While Drag and Drop in JavaFX has a common API for all the platforms (as the rest of the API, of course), its internal implementation is platform dependent, and it is quite different on Windows, Mac or Linux.

But this shouldn’t be an issue when migrating from JavaFX 8 to JavaFX 11, though.

The sample posted by the OP works the same on Windows and Mac with both JavaFX 8 and 11, and if it is not the case on Linux, it might have to do with the changes done in the latest release of JavaFX for Linux.

According to the releases note, under the Important Changes section we can see:

Switch default GTK version to 3

JavaFX will now use GTK 3 by default on Linux platforms where the gtk3 library is present. Prior to JavaFX 11, the GTK 2 library was the default. This matches the default for AWT in JDK 11. See JDK-8198654 for more information.

While this change was basically a two lines diff in the JavaFX code, and nothing changed from the implementation details for DND, the GTK 3 implementation might have changed from GTK 2, and those changes haven’t been taken into account.

Similar issues related to GTK have been reported for dialogs, windows or Wayland crashes.

Workaround

So far the only known workaround for all of those issues is to run the app with GTK 2, that can be set with the system property: jdk.gtk.version.

So this option can be added on command line:

java -Djdk.gtk.version=2 ...

to run the application.

As posted in the comments, this seems to solve the drag and drop issue.

Report the issue

Definitely, that confirms that this is an issue, and as such it should be filed at the OpenJFX issue tracker, providing the sample code to reproduce it, system details (OS version, Java version, JavaFX version…).

More Related Contents:

  1. Java 8 U40 TextFormatter (JavaFX) to restrict user input only for decimal number
  2. How to write a KeyListener for JavaFX
  3. Adding a custom component to SceneBuilder 2.0
  4. JavaFX-11 with VSCode
  5. How to get stage from controller during initialization?
  6. JavaFX 8 – Zooming Relative to Mouse Pointer
  7. JavaFX deployment library not found in active JDK
  8. TableView: adjust number of visible rows
  9. Copiable Label/TextField/LabeledText in JavaFX
  10. Colouring table row in JavaFX
  11. Update JavaFX Live nodes outside Application Thread
  12. How to use JDK without JRE in Java 11 [duplicate]
  13. How to right align a button in Java FX toolbar
  14. JavaFX module javafx.graphics
  15. JavaFX8 fxml naming of nested controllers
  16. JavaFX : Pass parameters while instantiating controller class
  17. Line Chart Live update
  18. Styling default JavaFX Dialogs
  19. Error invoking method, failed to launch jvm
  20. Passing Parameters JavaFX FXML
  21. Javafx – Can application class be the controller class
  22. JavaFX 2.1 TableView refresh items
  23. How to understand and use “ , in JavaFX?
  24. Value Change Listener for JavaFX’s TextField
  25. JavaFX 2 TableView : different cell factory depending on the data inside the cell
  26. JavaFX table- how to add components?
  27. Adding borders to GridPane JavaFX
  28. JDK 8 – “The type java.util.Map$Entry cannot be resolved” [duplicate]
  29. How do you use a JavaFX TableView with java records?
  30. JavaFX: Why does stage.setResizable(false) cause additional margins?

Leave a Comment