> On Sept. 7, 2017, 7:29 p.m., Albert Astals Cid wrote:
> > Ok, if you find that this works for you, at least i can't find any 
> > regression on the "old" code, so it should be good to ship.

Don't you mind that it is still unclear why the extra code at 
presentationwidget.cpp:730 is needed at all?  I could not look at this because 
some Qt quirk broke the whole patch for me a few month ago (no more proximity 
events at all).  Updating to Qt 5.9 brought the patch back to life just last 
week, and I was planning to have another look.


- Oliver


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On Oct. 5, 2016, 4:20 p.m., Oliver Sander wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/128858/
> -----------------------------------------------------------
> 
> (Updated Oct. 5, 2016, 4:20 p.m.)
> 
> 
> Review request for Okular.
> 
> 
> Repository: okular
> 
> 
> Description
> -------
> 
> I am trying to fix the following papercut:  I regularly write on pdf files in 
> presentation mode, using the pen that comes with my Lenovo ThinkPad Yoga.  
> When I approach the screen with the pen, the cursor appears, and it follows 
> the pen tip during writing.  When I lift off the pen, the cursor stays on, 
> and auto-hides only a few seconds later (because of 
> Okular::Settings::EnumSlidesCursor::HiddenDelay).  As a consequence, the 
> cursor frequently hides the last bits of what I have just written.  This is a 
> nuisance, because I do this in front of an audience, and a lot of it is math 
> (where every detail matters).
> 
> Ideally, the cursor would auto-hide when I lift the pen off the screen.  
> Luckily, Qt has an event for this: QEvent::TabletLeaveProximity.  Unluckily, 
> the documentation says (http://doc.qt.io/qt-5/qtabletevent.html):
> 
> "TabletEnterProximity and TabletLeaveProximity events [...] are only sent to 
> QApplication"
> 
> Therefore, this patch introduces a new class TabletApplication, which 
> inherits from QApplication, and is used in main.cpp instead of QApplication.  
> The proximity events are really caught, and each time a short note is printed 
> on the console.
> 
> Unfortunately, at this point I am stuck and need some help.  Apparently, I 
> cannot control the cursor from a QApplication.  How do I get the information 
> that a TabletProximity has been caught to the presentation widget? Maybe the 
> answer is trivial, but I have very little Qt programming experience.  Thanks 
> for your help!
> 
> 
> Diffs
> -----
> 
>   ui/presentationwidget.h 69574d2 
>   ui/presentationwidget.cpp c16d616 
> 
> Diff: https://git.reviewboard.kde.org/r/128858/diff/
> 
> 
> Testing
> -------
> 
> 
> Thanks,
> 
> Oliver Sander
> 
>

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