<div dir="ltr"><div><div><div>I'm experiencing this issue also, although only occasionally, on a laptop with a trackpad and Gentoo. Since a trackpad allows one to press the buttons without any movement of the mouse cursor, I have experimented a little:<br>
</div><br>When the context menu (opened with a right-click) is immediately closed after it starts to appear (sometimes leaving a sliver of the menu's window's title area), moving the mouse cursor a tiny amount, and then retrying a right-click, the menu will be opened and receive focus as normal. <br>
<br>Conversely, I have been able to make the problem occur after first successful opening the context menu, just by moving the mouse cursor a tiny amount, and performing another right-click.<br><br></div>My current thinking is that the mouse (x, y) at context menu launch is being compared to the mouse (x, y) at a slightly later time, and if the delta is too great (> 0?) then the context menu is closed. This could be exposing a threading issue; the context menu is being painted by one thread, and another thread is detecting the mouse movement and closing the window, sometimes leaving the window-sliver artifact (a remnant of the window as it started growing). I thought window painting and removal were performed serially in the same thread, but that doesn't seem to be what I'm seeing.<br>
<br>Maybe the issue is triggered with noise from the mouse-device's sensors causing the two (x,y) samples to vary. Maybe turning down the sensitivity or otherwise playing with the settings in the mouse driver would help?<br>
<br>Perhaps, the two samples are the results of two calculations performed in different orders, exposing some subtle rounding error? Maybe the mouse cursor position is being reported relative to two different points (e.g. relative to the screen in one and relative to the window in the other)? <br>
<br></div><div>I'll poke around in the code some and maybe I can help debug further.<br><br></div><div>Cheers,<br><br>Kieron.<br></div><div><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, Sep 26, 2013 at 3:32 AM, Laurent <span dir="ltr"><<a href="mailto:laurent.orseau@gmail.com" target="_blank">laurent.orseau@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div>This problem was never really gone for me actually. <br></div>It has become less of a problem, but I still sometimes need to click a few times to get the right menu.<br>
</div>Also, the 'definitions' drop-down list can disappear after clicking it and moving the mouse pointer through it.<br>
So it may be more general than just the right-click menu.<br><br></div>You may still try the latest nightly version, which has had a lot of improvements since 5.3.6:<br><a href="http://www.cs.utah.edu/plt/snapshots/" target="_blank">http://www.cs.utah.edu/plt/snapshots/</a><span class="HOEnZb"><font color="#888888"><br>
<div><br>Laurent<br></div></font></span></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, Sep 26, 2013 at 9:41 AM, bhrgunatha <span dir="ltr"><<a href="mailto:bhrgunatha@hotmail.com" target="_blank">bhrgunatha@hotmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I'm having a problem with pop-up menus disappearing immediately from the editor in DrRacket under linux. This is the same as the original problem reported in Nov 2011 [1] - is this a regression problem? Or is it triggered by something new?<br>
<br>
I remember suffering from this in the past, but it was fixed. But the exact same problem has returned for me.<br>
<br>
Arch Linux 64 bit:<br>
Linux 3.11.11-1-ARCH #1 SMP PREEMPT x86_64 GNU/Linux<br>
<br>
DrRacket 5.3.6.<br>
(I'm using the binary package from Arch, but had the same problem with a version I compiled myself)<br>
<br>
I can't see anything consistent causing the problem. It just seems like it occurs randomly.<br>
<br>
Editing in DrRacket has become very unpleasant in recent months for me :( [2]<br>
<br>
Can anyone offer any help to fix this problem?<br>
Bhrgunatha.<br>
<br>
<br>
[1] <a href="http://thread.gmane.org/gmane.comp.lang.racket.user/14710/focus=17669" target="_blank">http://thread.gmane.org/gmane.<u></u>comp.lang.racket.user/14710/<u></u>focus=17669</a><br>
<br>
[2] <a href="http://thread.gmane.org/gmane.comp.lang.racket.user/19549/focus=19555" target="_blank">http://thread.gmane.org/gmane.<u></u>comp.lang.racket.user/19549/<u></u>focus=19555</a><br>
<br>
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