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  1. JDK
  2. JDK-8187778

"IllegalStateException: Cannot start drag and drop outside of DRAG_DETECTED event handler" on drag and drop

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Details

    • Bug
    • Resolution: Cannot Reproduce
    • P3
    • tbd
    • 8, 9, 10
    • javafx
    • None
    • generic
    • windows

    Description

      Problem Description:
      On doing multiple drag and drop it ends up with Exception:
      Exception in thread "JavaFX Application Thread" java.lang.IllegalStateException: Cannot start drag and drop outside of DRAG_DETECTED event handler

      If we do some action after the initial exception more exception are coming.
      Exception in thread "AWT-EventQueue-0" java.awt.dnd.InvalidDnDOperationException: Drag and drop in progress

      Exception in thread "JavaFX Application Thread" drag recognized...java.lang.IllegalArgumentException: Key already associated with a running event loop: javafx.embed.swing.FXDnD@e4f5588

      Steps to reproduce:
      Run the attached test case SwingFXDnDTest.java
      Do multiple drag and drop as shown in the attached video:drag_and_drop.mp4

      Issue is reproducible in JDK8, JDK9 build 181 , JDK10 build 24.

      There are small difference in the exception stack trace in JDK8 and 9(9 and 10 is same). So attached the stack trace for JDK 8 and 9.

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              psadhukhan Prasanta Sadhukhan
              akolarkunnu Abdul Kolarkunnu
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                Created:
                Updated:
                Resolved: