Re: What is the reason for the History.newItem(token) to invoke the onvaluechange(...) by default

I think its not the default behavior because its more likely that you use the history.newItem() method to actually navigate to a different place.

Actually when your whole app uses history tokens, then "clicking on the tab title" would not cause the tab panel to switch tabs itself but it would cause a history.newItem() and because of that new history token the tab will be selected later on in your ValueChangeHandler.

You could achieve this by adding a BeforeSelectionHandler to your tab panel. Inside the handler you can cancel the tab switch (event.cancel()) and create a new History item instead. Then the history mechanism you have implemented will do the tab selection everytime someone clicked a tab.

-- J.

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