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https://issues.apache.org/jira/browse/PIVOT-751?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13065790#comment-13065790
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Edvin Syse commented on PIVOT-751:
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Yes, I was also quite surprised that there were no default tabclosing-policy.
It's easy to deal with, but kind of strange that there is no default behavior.
Every other GUI toolkit I know of defaults to showing another tab, and others
even provide different tabclosing-policies to choose from.
> TabPaneSelectionListener#selectedIndexChanged called twice when first tab is
> inserted
> -------------------------------------------------------------------------------------
>
> Key: PIVOT-751
> URL: https://issues.apache.org/jira/browse/PIVOT-751
> Project: Pivot
> Issue Type: Bug
> Components: wtk
> Affects Versions: 2.0
> Reporter: Edvin Syse
> Priority: Minor
> Fix For: 2.0.1
>
> Attachments: PIVOT751.java, PIVOT751.txt
>
>
> If you add a tab to an _empty_ tabpane, two selectedIndexChanged events are
> called. I.e, when you add a TabPaneSelectionListener to a tabpane and call:
> tabpane.getTabs().add(component);
> .. the listener fires twice, with previousSelectedIndex set to -1 and then 0.
> The two events are fired by line 68 and 72 in TabPane.java:
> 68 tabPaneListeners.tabInserted(TabPane.this, index);
> 69
> 70 // Fire selection change event, if necessary
> 71 if (selectedIndex != previousSelectedIndex) {
> 72 tabPaneSelectionListeners.selectedIndexChanged(TabPane.this,
> selectedIndex);
> 73 }
> This could be fixed by taking into account that previousSelectedIndex might
> have been -1 when invoked, like this:
> if (selectedIndex != previousSelectedIndex && previousSelectedIndex > -1) {
> See this thread for more info:
> http://apache-pivot-users.399431.n3.nabble.com/TabPaneSelectionListener-selectedIndexChanged-called-twice-when-first-tab-is-inserted-td3022515.html
> PS: According to Chris, CardPane and Accordion behave in the same way, so any
> changes to TabPane should also be made to these for consistency.
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