[python-win32] Win32 service with tray icon

[Thomas Heller]

Larry Bates schrieb:
> Mark Hammond wrote:
>>> I'm writing a win32 service in Python.  I'd like to add a
>>> tray icon displayed
>>> whenever the service is running.  I have played around with
>>> SysTrayIcon.py
>>> [1], but if a user logs off and logs back on, the tray icon
>>> disappears even
>>> though the service is still running.  I think the answer is
>>> probably getting
>>> my service to recreate the icon whenever a logon event
>>> happens.  I don't
>>> really know much about win32 programming, though.  Can
>>> someone point me in
>>> the right direction to solve this problem?
>> 
>> Services have trouble interacting with the desktop.  The general approach is
>> to have a dedicated taskbar application that communicates with the dedicated
>> service using some kind of IPC.
>> 
>> Mark
> 
> Mark,
> 
> Please accept my apology for hijacking this thread, but it is exactly
> what I want to implement.  I have a COM object that is doing an upload.
> I want a system tray icon that:
> 
> 1) Shows a heartbeat (upload progress indicator)
> 2) Provides the user with a way to cancel the upload
> 
> I found systrayicon.py and it almost does what I want.  I thought
> about using socket server/client to have the two apps communicate
> but I'm at a complete loss as to how to implement socket client
> in the systrayicon.py program since it uses PumpMessages.  I just
> don't see how to connect to my com server (which would also be
> a socket server) inside some loop mechanism.

You set the sockets to non-blocking, and use WSAAsyncSelect to get
messages posted to the messageloop when something interesting happens
to the socket.  I do not know if pywin32 exposes WSAAsyncSelect, otherwise
you can use ctypes to call it.

Thomas