Eclipse Community Forums: Nebula » TableCombo sends a selection event on each opening of drop down box

Home » Eclipse Projects » Nebula » TableCombo sends a selection event on each opening of drop down box (The TableCombo sends a selection event whenever the drop down box gets opened)

TableCombo sends a selection event on each opening of drop down box [message #1755835]

Wed, 08 March 2017 09:18

Eclipse User

Hi,

When using the Nebula TableCombo, we recognized that a selection listener added to the TableComboViewer always receives a selection event for the first row of the table whenever the drop down box gets opened (e.g. the user clicks on the arrow button next to the combo box) .

Is this an intended behavior or a bug?
It is reproducible by simply running one of the examples of the official sample snippets in
https://www.eclipse.org/nebula/snippets.php#TableCombo and setting a breakpoint into the "selectionChanged()" method of the SelectionListener.

This behavior of the TableCombo produces undesired side effects when the table viewer is bound to an external model that reacts to selections in the table (as it is in our RCP application) as one gets selection change events although the user did not select anything.

Re: TableCombo sends a selection event on each opening of drop down box [message #1755850 is a reply to message #1755835]

Wed, 08 March 2017 10:26

Eclipse User

Hi Matthias,

Yes this sounds like a bug to me. Initially the first element is not selected so it should not fire a selection event on that element. If you file a bug and supply a patch through Gerrit I will make sure that it gets in.

https://wiki.eclipse.org/Nebula/New_Contributions

Best regards,

Wim

Re: TableCombo sends a selection event on each opening of drop down box [message #1756063 is a reply to message #1755850]

Fri, 10 March 2017 08:26

Eclipse User

Hi Wim,

When I click on the link you posted (https://wiki.eclipse.org/Nebula/New_Contributions), my Firefox Browser on CentOS displays the following error page:

"MediaWiki 1.26 internal error
Installing some external dependencies (e.g. via composer) is required. "

[Updated on: Fri, 10 March 2017 08:30] by Moderator

Re: TableCombo sends a selection event on each opening of drop down box [message #1756073 is a reply to message #1756063]

Fri, 10 March 2017 10:32

Eclipse User

A temporary hiccup, i'm sure.

Regards,

Wim

Re: TableCombo sends a selection event on each opening of drop down box [message #1758940 is a reply to message #1756073]

Tue, 04 April 2017 13:29

Eclipse User

Hi,

I've posted a referring bug report to the Eclipse Bugzilla: https://bugs.eclipse.org/bugs/show_bug.cgi?id=514731

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