[PATCH v2] systray: Hide systray for fullscreen games

[Gabriel Ivăncescu]

On 12/30/18 02:54, Hamish Claxton wrote:
> Hi Fabian,
>
> Yes, this only hides the tray when it should. The code only happens on
> the WM_DISPLAYCHANGE event, which occurs on resolution changes. I
> wouldn't write any code that would damage any existing features.
>
> While the resolutions shouldn't differ, actually the SM_CYFULLSCREEN
> reports a larger dimension by 11. What happens is beforehand, the
> systray was getting drawn no matter what on a resolution update. This
> patch checks if the current foreground game is covering the entire
> screen, hence covering the area where the systray would normally be
> drawn, which is also the entire desktop resolution, and if it is, does
> not draw the systray.
>
> I tested this patch thoroughly and it only enhances existing functionality.
>
> Thanks in Advance,
> Hamish
>

GetSystemMetrics, as its name implies, gives system metrics (constants) 
and not that of the current foreground game as you want. It will always 
apply. Furthermore, this doesn't handle situation with multiple displays.

You probably want to check if there's a full screen window somehow, or 
use MonitorFromWindow / GetMonitorInfo / GetWindowRect and compare, but 
I don't know if that's a good way to go about this.