That is not supported by default (at least not on Win). Since you switch to another window/process usually this should not be intercepted/prevented by an application.
But it is doable using a hook: http://stackoverflow.com/questions/1161053/capturing-keystrokes-without-focus http://stackoverflow.com/questions/1346689/how-do-i-trap-windows-key-alttab-ctrlaltdelete-in-c Bye T. > Gesendet: Montag, 13. Januar 2014 um 12:50 Uhr > Von: "[email protected]" <[email protected]> > An: Pharo-dev <[email protected]> > Betreff: Re: [Pharo-dev] Detect when Pharo loses focus > > I wasn’t able to find something like that. > > There is MorphLostFocus, bit is not triggered by World. And not triggered > when Pharo loose focus. > > Cheers, > R > > On Jan 13, 2014, at 12:00 PM, Benjamin <[email protected]> > wrote: > > > Did World trigger a keyboard focus lost announcement? > > > > Ben > > > > On 13 Jan 2014, at 06:49, [email protected] wrote: > > > >> Hi guys, > >> > >> I am trying to detect when a user switches her focus from Pharo to another > >> app. > >> > >> In short I’d like to know when the user switches (i.e., atl+tab) from the > >> Pharo application to another application, losing focus from the > >> development. > >> > >> I looked into Morphic and I was able to tell when the mouse goes outside > >> the Pharo window. > >> Unfortunately this technique does not work when the user uses alt+tab to > >> switch to another app, since the last mouse event is not outside the Pharo > >> window. > >> > >> Any suggestion where to look? > >> > >> Thanks in advance, > >> R > > > > >
