[Qt-interest] Focus on a hidden widget.

[Pritam Ghanghas]

On Thu, 2011-03-10 at 21:22 +0530, Atlant Schmidt wrote:
> Expanding on what Bo said...
> 
> Remember, the widget really has to be visible so its
> parent widgets all the way up the chain of parentage
> must also be showing when you attempt to set focus
> to that widget. Even though you called show() on
> that widget, it might still not be visible if a parent
> (grandparent, etc.) is still hidden.
> 
> Logically, this makes sense: you wouldn't want to have
> a bunch of widgets hanging around with "pending focus
> should they become visible"; it would create a lot of
> ambiguity about which widget would *REALLY GET* the focus
> if a bunch of them suddenly became visible. Instead, the
> rule is simple: you can only assign focus to a widget
> that is currently really truly being shown.
> 
>                        Atlant
> 
> 
I think the documentation here means that "the widget wont gain focus
untill it is shown". But if you have called setFocus() on a widget and
it become visible after that, it will get focus. Unless setFocus() has
been called on some other widget in the mean time.
But this doesn't work if focusProxy is set on hidden widget.
I didnt look at qt code though?

> -----Original Message-----
> From: qt-interest-bounces+aschmidt=dekaresearch.com at qt.nokia.com [mailto:qt-interest-bounces+aschmidt=dekaresearch.com at qt.nokia.com] On Behalf Of Bo Thorsen
> Sent: Thursday, March 10, 2011 01:17
> To: qt-interest at qt.nokia.com
> Subject: Re: [Qt-interest] Focus on a hidden widget.
> 
> Den 09-03-2011 16:57, Kahola.g skrev:
> > Hi
> >
> > I am facing a very peculiar problem. My widget is not getting focus.
> > When i create the widget i call following two functions on it
> > show()
> > setFocus()
> >
> > this kind of code used to work. But all of a sudden i am in a situation
> > where it doesnt seem to work. As I understand " if set focus is called
> > on a widget that is not shown yet, it will get focus as soon as it
> > becomes visible". Am i wrong here?
> 
> Did you forget to call setFocusPolicy on the widget, perhaps?
> 
> Another possibility is that you are calling setFocus too early. From the
> docs: "Be aware that if the widget is hidden, it will not accept focus
> until it is shown." You might have to wait for the widget to be shown
> before you can call setFocus.
> 
> Bo Thorsen,
> Fionia Software.
> 
> --
> 
> Expert Qt and C++ developer for hire
> Contact me if you need expert Qt help
> http://www.fioniasoftware.dk
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