[Bug 1864814] [NEW] Improve UX for macOS when launching from a fullscreen app

[Peter Vegh]

Public bug reported:

System/setup:
* MacBook Pro, macOS (any version from the last 2 years), external monitor.
* IDE on the laptop, emulator is used on the external monitor.

Currently, when starting the emulator from e.g. Android Studio or
IntelliJ IDEA, which is set to fullscreen mode on the laptop, which is
like it's own virtual desktop (Space) in macOS, what happens is this:

1. The virtual desktop (Space) on the laptop screen is switched because of #2. 
The reason is that only one window can be shown in Fullscreen this way.
2. The qemu splashscreen is shown for a few seconds, then it disappears. This 
is the reason for the virtual desktop switch. This splashscreen seems actually 
unnecessary to me, it has no value and it causes problems.
3. The actual emulator is shown, in my case on the external monitor 
(correctly). I guess if the splashscreen would not be shown, the virtual 
desktop switch would not happen, because the emulator would happen on the 
correct screen directly.

So maybe the splashscreen and the emulator window should be the same window, so 
that the OS can remember it's position being the same as the emulator?
Or maybe the splash could be disabled (by default? otherwise an update to IDEs 
would be necessary for the improved behavior?)

** Affects: qemu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1864814

Title:
  Improve UX for macOS when launching from a fullscreen app

Status in QEMU:
  New

Bug description:
  System/setup:
  * MacBook Pro, macOS (any version from the last 2 years), external monitor.
  * IDE on the laptop, emulator is used on the external monitor.

  Currently, when starting the emulator from e.g. Android Studio or
  IntelliJ IDEA, which is set to fullscreen mode on the laptop, which is
  like it's own virtual desktop (Space) in macOS, what happens is this:

  1. The virtual desktop (Space) on the laptop screen is switched because of 
#2. The reason is that only one window can be shown in Fullscreen this way.
  2. The qemu splashscreen is shown for a few seconds, then it disappears. This 
is the reason for the virtual desktop switch. This splashscreen seems actually 
unnecessary to me, it has no value and it causes problems.
  3. The actual emulator is shown, in my case on the external monitor 
(correctly). I guess if the splashscreen would not be shown, the virtual 
desktop switch would not happen, because the emulator would happen on the 
correct screen directly.

  So maybe the splashscreen and the emulator window should be the same window, 
so that the OS can remember it's position being the same as the emulator?
  Or maybe the splash could be disabled (by default? otherwise an update to 
IDEs would be necessary for the improved behavior?)

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