[PyQt] QSystemTrayIcon.activated weird Trigger behavior (PyQt 5.6) on Windows

[Marius Shekow]

Hi,

I have 2 issues with QSystemTrayIcon. I'm running Python 3.5.1 32-bit, 
and PyQt 5.6 (with Qt 5.6) on Windows 7 x64.

1) I tested 2 different Windows 7 x64 machines, regarding detecting 
single-click vs. double-click. On one machine, everything works as 
expected. A single click gave me QSystemTrayIcon.Trigger, a double click 
gave me QSystemTrayIcon.DoubleClick. On the other machine, however, a 
double click would always first produce a Trigger followed by the 
DoubleClick shortly after. On the machine where the behavior was as 
expected, I discovered that I've never changed the Windows mouse double 
click interval setting in my life. When I changed that setting, the 
behavior became bad, like for the other machine (irreversible). 
Regardless which value I'm setting the delay to, I can't get it back to 
working as expected.
Following other people's advice, I'm using a disambiguation-timer, but 
that is really just a hack and Qt should disambiguate this for me. Any 
ideas?

2) I noticed that my slot for the activated-signal isn't called on a 
single-click in the following situation:
Step 1: User opens the QMainWindow of my application (e.g. by 
double-clicking the icon, or by using my tray icon context menu and 
clicking on one of my QActions - both ways call 
MyMainWindow.really_show_it())
MyMainWindow.really_show_it() call super().showNormal() and then 
self.activateWindow(). Would I omit the latter, the window would not 
come in the foreground if the user was working with a different 
foreground application. Since the user explicitly asks for that window, 
I consider it appropriate to force that it's shown by using 
self.activateWindow()
Step 2 (optional): user closes the MainWindow, or minimizes it
Step 3: User performs a single-click on the tray icon. NOTHING happens. 
At all. But my slot should be called. But it isn't.
Step 4: User repeats step 3: this time the signal is emitted (with 
QSystemTrayIcon.Trigger, as expected)

Note: DoubleClick behavior is not affected, i.e. if you replace step 3 
with "User peforms double click on the tray icon", then the 
activated-signal is emitted with QSystemTrayIcon.DoubleClick, as expected.

I've read that other people had problems as well with this and they 
suggested to catch the raw events. This doesn't work either. When I 
create my own sub-class for QSystemTrayIcon and override the event() 
method, it is never called, except for when I close my program (then I 
get the delete event). I doubt that this is expected behavior.

I'm thankful for any input you can provide ;).

Cheers!
Marius