Re: Tool bar buttons do not respond while redisplaying?

[Kim F. Storm]

Stefan Monnier <address@hidden> writes:

> While working on my MPC.el front end to the Music Player Daemon, I noticed
> that the tool bar buttons (which I usually don't use) aren't very
> responsive, or more specifically, ignore some of my clicks.
>
> This is on GNU/Linux with a default Xaw3d build.
>
> Here is the best way I can describe the behavior I'm seeing:
>
> MPC.el runs a timer every second which polls the MPD daemon (via
> a network-process) to know which songs is currently playing, and the time
> offset (which is the only thing that changes often enough to justify the 1s
> pool interval), and then updates the content of the
> mpc-status-buffer accordingly.
>
> If I move the mouse over one of the icons of the toolbar, I see that icon
> being "raised", as expected, but every second or so it flickers betwen
> raised and not raised.
> If I happen to click just when it flickers, the click is ignored.
>
> This doesn't render Emacs unusable, but it makes it feel very flaky :-(

I found a simpler way to provoke the same behaviour:

* emacs -Q
* (setq mouse-highlight 1)
* move cursor over a raised tool-bar icon
* wait for the tool-tip to go away
* press and release the CTRL key

This briefly changes the icon to "not-raised" and the mouse pointer
from an arrow to the "text cursor".

-- 
Kim F. Storm <address@hidden> http://www.cua.dk