Hi Fabio,

I have noticed this too.  Thanks for bringing it up.

I've done some research this morning and found that the problem seems to be brought on by Morphic-mt.1474.  It does not matter if one loads the follow-up update, Morphic-mt-1475, nor the companion update, System-mt.1051.

"
Name: Morphic-mt.1474
Author: mt
Time: 9 January 2019, 9:00:34.991737 am
UUID: 14bd0540-84ba-480a-9878-754c07a26db5
Ancestors: Morphic-tpr.1473

Clean-up and bug fixes in resize grips. See http://forum.world.st/Please-Review-Some-updates-for-resize-grips-td5092584.html <http://forum.world.st/Please-Review-Some-updates-for-resize-grips-td5092584.html>
"

Note that for testing this, a new system window needs to be created:  loading this update will not effect already-existing windows.  (Though it might be my imagination, it /seems/ as if already-existing windows change their SystemWindowButton a /bit/ slower after loading this update...?)

I wonder why it effects Mac OS but not Linux.

Best,
Tim

PS – what did you use to create that animated GIF screenshot?  That was pretty nice, and showed up clearly in an email message.



> On Apr 18, 2019, at 9:00 AM, Fabio Niephaus <lists at fniephaus.com> wrote:
> 
> Yes, I'm using macOS. Forgot to mention that. Everything seems to work fine on Linux.
> A quick binary search through old trunk bundles from [1] suggests that the problem was introduced in January. Hope I have some time to look into this in more detail soon.
> 
> Fabio
> 
> [1] http://files.squeak.org/5.3alpha <http://files.squeak.org/5.3alpha>
> 
> On Thu, Apr 18, 2019 at 2:38 PM K K Subbu <kksubbu.ml at gmail.com <mailto:kksubbu.ml at gmail.com>> wrote:
> I couldn't reproduce it in my Squeak image (Ubuntu 16.04 64b). I see a 
> fading only when hovering over the X icon of a minimized window but it 
> doesn't flicker.
> 
> Is this on OS X?
> 
> Regards .. Subbu
> 
> On 18/04/19 1:32 AM, Fabio Niephaus wrote:
> > Hi all,
> > 
> > I just downloaded the latest trunk build (Squeak5.3alpha-18491-64bit, 
> > see [1]) and noticed this weird hover animation:
> > button.gif
> > 
> > It seems that only the close buttons (in all system windows) are 
> > effected and I have no idea why and since when. Other buttons behave as 
> > usual.
> > 
> > Does anyone have an idea what this could be and how to fix it?
> > 
> > Fabio
> > 
> > 
> > [1] http://files.squeak.org/5.3alpha/Squeak5.3alpha-18491-64bit/ <http://files.squeak.org/5.3alpha/Squeak5.3alpha-18491-64bit/>
> > 
> > 
> 
> 

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