On Fri, Jul 20, 2012 at 7:57 PM, Konstantin Tokarev <annu...@yandex.ru>wrote:
> > 20.07.2012, 17:43, "pritam.ghang...@gmail.com" <pritam.ghang...@gmail.com > >: > > On Fri, Jul 20, 2012 at 7:00 PM, Konstantin Tokarev <annu...@yandex.ru> > wrote: > >> 20.07.2012, 17:23, "pritam.ghang...@gmail.com" < > pritam.ghang...@gmail.com>: > >>> Hi All,I was looking at qt code to understand "how focus management > code in qt works in case of keyboard/remote devices". > >>> I have some loose ends here. I am hoping someone with more exposure to > these areas can help me out. > >>> 1. I couldn't figure out how qt is able to move focus between buttons > in a widget with left/right. I didn't see any code doing that. There was > >>> code in qwidget.cpp that handles tab/backtab but no right/left. > >>> 2. When I enabled directional navigation with QT_KEYPAD_NAVIGATION, it > screwed up all default focus handling my QTableView. > >>> Any link to some write up about these areas of qt or guidelines about > focus handling in pointer less devices will be extremely helpful. > >> > >> We write keyPressEvent handlers for our widgets (or event filters) and > use QWidget::setFocus(). > > we have been doing same but this distributed handling is turning out to > be error prone. If some robust mechanism is possible, I would like to take > advantage of that. Even if its partial. Moreover we have had bugs sometimes > when we lost focus with no one having focus. Mostly easy to fix just by > looking at new code. > > But recently I had a issue where i am not able to figure out how I lost > focus. The target widget gets focus momentarily but then looses focus. > There doesn't seem to be any code in our application that may do that. I > tried intercepting all focus in and focus out events at application level > to see what is happening. No success as yet. The widget that looses focus > is a button inside my own custom dialog. I thought lets have a deeper > understanding of "how qt works in this area before deciding something" > > Connect your slot to QApplication::focusChanged() and set breakpoint in it. > I don't have debugger on the target environment but I will see what I can do with that signal. Thank you for the suggestion. > -- > Regards, > Konstantin > -- pritam
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