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2.1 RC1 motif build. org.eclipse.help.ui.internal.ContextHelpDialog registers TraverseListener with Shell. The listener is called when "Tab" key or "Shift-Tab" key combination is pressed. It shoud not be invoked for these keys.
This is not actually a bug. The detail indicates that the key might be used as mnemonic which would be strange for Tab, but no illegal.
This behavior occurs on F1 help infopop that does not have any mneumonics set as far as I know. Why is the listener called on motif, while it is not called on Windows?
Where is the keyboard focus? There are differences between platforms when SWT.ON_TOP is used when creating a shell. Can you append a snippet that shows the problem to this PR? Thanks.
Created attachment 3836 [details] simplified ContextHelpDialog.java This bug together with bug 33776 cause a problem for help, where pressing Tab on the F1 infopop causes focus to traverse all focusable widget and then gets lost (pressing Tab more times does not bring it back). On the other hand Shift-Tab works O.K. If you run the attached snippet on Windows you will notice that TraverseListener is not called when Tab is pressed, and everything works fine. If you run it on Motif, Tab will bring move focus to the second button, and next gets lost. The TraverseListner is being called with doit set to false. If you comment out registering of a listener, everything magically works again. I have temporarily fixed a problem for help by adding a workaround that sets doit to true inside the listener, but according to my consultation with Felipe, the handler should not be called at all.
The "commenting out of the listener" bug has been fixed by Felipe. The fact that you are getting a traverse for a Tab character on Linux is also fixed.
