That sounds like a bug in WComboBox: the possibility to have 'no selection'
is a relatively recent feature. Can you file it as a bug?
2016-04-16 19:18 GMT+02:00 Aarón Bueno Villares <abv15...@gmail.com>:
> Sorry to ask so many things but, I think I've found a bug, or I'm doing
> something wrong.
>
> I have a model (a tablemodel), used by a WTableView, and a
> WAbstractProxyModel which "proxies" that model as a list. I don't use a
> WStringListModel because the "column" I'm using to deliver data from the
> source model depend on the context and it's not fixed (and some other
> obscure reasons that I no longer remember).
>
> In a different "page" of my admin site, I use a WComboBox which uses that
> proxy model to set the combobox data. However, if the current index of the
> combobox is -1, but the source model changes for whatever reason, the
> WComboBox is rendered as if the first element were selected. When the
> currentIndex isn't -1, the problem doesn't seem to happen.
>
> Specifically, before the source model changes, the "value" attribute of
> the <select> DOM node is "", and, after changing the source model (a reset
> or an insert row signal is thrown), is "0".
>
> Which is even weirder, is that, "re"setting the currentIndex as -1 after
> the change, doesn't work. Even, deleting the WComboBox and creating another
> new one, doesn't solve the issue either. My Wt version is 3.3.4. The only
> solution that I think could work is creating a WTimer to "change" the
> WComboBox value to -1 after the change of source model and the page
> re-rendering.
>
> Peregring-lk,
>
>
>
>
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