[Interest] Screen capture in fullscreen under Windows

[Jérôme Godbout]

Another interesting fact, printscreen too doesn't work while application is
in fullscreen.

On Wed, Jul 8, 2015 at 11:07 AM, Jérôme Godbout <jerome at bodycad.com> wrote:

> Hi,
> I'm trying to capture some video for demo and training purpose, but I
> cannot get the screen capture for any third party apps to work while my
> application is in fullscreen (under Windows 7). We use a QMainWindow with
> QQuickView inside it.
>
> I end up with the first frame captured and if like nothing ever get
> repaint into the capture (on screen it's ok).
>
> Since I couldn't get it to work, I tried to put the Window
> with Qt::FramelessWindowHint to see. Look like it hide the window, I try to
> show() and Qt::WindowMaximized.
>
> I always end up with bad positioning and not maximized window of my window
> no matter how many or in any order I request them.
>
> I also try to combined the Qt::FramelessWindowHint | Qt::Tool to get it to
> work with not much success.
>
> The only way I could get a frameless window take all available space, was
> to put it frameless, go full screen and exit fullscreen. It work, the mouse
> click work but I loose keyboard focus forever and cannot use the keyboard
> anymore inside the application (even alt-tab and ctrl-tab on OS level stop
> working!), have to invoke the TaskManager to get out it.
>
> Anybody have a good way to capture an application in full screen?
>
> Side note:
> Qt::FramelessWindowHint make the window use primary screen resolution no
> matter on which screen it is (I have my 1st as landscape screen and a 2nd
> as portrait one, if I do frameless on 2nd screen the render is done with
> 1st screen resolution, fullscreen work ok under this situation).
>
> Jerome
>
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