[prev in list] [next in list] [prev in thread] [next in thread] 

List:       pykde
Subject:    Re: [PyQt] Issue with touch panel and QWebEngineView since upgrading PyQt5.8 -> 5.10
From:       Phil Thompson <phil () riverbankcomputing ! com>
Date:       2018-08-15 8:52:55
Message-ID: 42CC0E44-1043-41CC-B1B4-A2E475EBC5AB () riverbankcomputing ! com
[Download RAW message or body]

On 14 Aug 2018, at 11:31 pm, Brian Knudson <brian.knudson@cxcsimulations.com> wrote:
> 
> 
> 
> On Tue, Aug 14, 2018 at 2:12 PM, Phil Thompson <phil@riverbankcomputing.com> wrote:
> On 14 Aug 2018, at 7:09 pm, Brian Knudson <brian.knudson@cxcsimulations.com> wrote:
> > 
> > Ooops.  I somehow sent that last message while trying to type "PyQt".  Not quite \
> > sure how that even happened.  Let's try that again. 
> > 
> > 
> > Hello all,
> > 
> > I have an application that uses QWebEngineView to render its main UI. The html \
> > page rendered by QWebEngineView relies on a lot of Javascript and CSS, and has \
> > been working well for a year or so while using PyQt5.8.1.  I recently moved to \
> > PyQt 5.10.1 and am now having problems when using a consumer grade touch panel \
> > (Planar or Viewsonic or the like) to control the application. 
> > In the html UI, there is a '+' and a '-' on which the user can tap to change a \
> > number.  With PyQt5.8.1, the user can tap as fast as they'd like.  With 5.10.1, \
> > if they tap too fast (not impossibly fast, but just quick tapping), they loose \
> > the ability to tap. Occasionally, the number will continue to increment after the \
> > ability to tap is lost. 
> > I can get the ability to tap back if I click the '+' or '-' with the mouse.  I \
> > suspect doing so is giving the "mouse up" that seems to have gotten lost with \
> > fast tapping. 
> > Because I don't have both versions of Qt and PyQt installed on the same machine, \
> > to test this, I compiled my app with PyInstaller 3.2.1 on each machine, then \
> > copied the executables around to several other machines (running both Windows 7 \
> > and 10). On every machine, the one compiled with PyQt 5.10.1 showed the "lost \
> > ability to tap" issue, while the one compiled with PyQt 5.8.1 worked as expected. \
> >  
> > I should note that this is commercial PyQt, so it's compiled from source.  I used \
> > Visual Studio 2015 on Windows 7 to compile PyQt 5.8.1, and Visual Studio 2017 on \
> > Windows 10 to compile PyQt 5.10.1. 
> > This issue is on Windows.  This app isn't cross platform, so I haven't tested on \
> > other OSs. 
> > I wonder if anyone has seen this or has a suggestion as to where to start looking \
> > for a solution.
> 
> You haven't mentioned the version(s) of Qt involved.
> 
> working as expected:
> PyQt 5.8.1 / Qt 5.8.0 / SIP 4.19.1 on Windows 7. PyQt compiled with Visual Studio \
> 2015 
> loses tap ability after tapping too quickly:
> PyQt 5.10.1 / Qt 5.10.1 / SIP 4.19.8 on Windows 10. PyQt compiled with Visual \
> Studuio 2017

So the most likely cause is the different Qt version.

Phil
_______________________________________________
PyQt mailing list    PyQt@riverbankcomputing.com
https://www.riverbankcomputing.com/mailman/listinfo/pyqt


[prev in list] [next in list] [prev in thread] [next in thread]