nanogui: Support for on-screen keyboard
Subject:
Re: Support for on-screen keyboard
From:
Warner Losh ####@####.####
Date:
15 May 1999 18:20:28 -0000
Message-Id: <199905151815.MAA61253@harmony.village.org>
In message ####@####.#### Vidar Hokstad writes:
: With Alex' suggestion, it would be something like:
:
: windowid = GetLastFocusedWindow()
: SendKeyEvent(...)
:
: I think Alex' suggestion is cleaner than mine, as it would work with any
: widget set without modification.
There is a race condition here. If the keyboard focus changes between
the GetLastFocusedWindow and SendKeyEvent, then you can have
problems.
Why not just SendKeyEvent(...)? Maybe with a WindowID of 0 to mean
current focus. That way there can be no race condition.
I've had to fight many problems like this in other toolkits (or to
keep other toolkits from having them). It happens more often than
you'd otherwise think. I know I was surprised to find them when I was
working on OI.
Warner
