[Interest] Need some help tracking down an issue

Scott Bloom scott at towel42.com
Fri Apr 14 20:42:38 CEST 2023

This is PART of the problem… I was able to fix it.

Basically, as a duplicate is found, the UI creates a QStandardItem for the model.  The first column if its an image file, will show an icon.

The creating of the QIcon itself was causing a gui lock up ☹  Because Qt uses the global threadpool to convert the files data into a qimage.

I was able to fix that by pushing the icon loading to later, but Ill likely use a different threadpool for my side.

But, while its loading and computing, the UI is getting updated, however its not responding to any clicks at all.

From: Mårten Nordheim <marten.nordheim at qt.io>
Sent: Friday, April 14, 2023 11:02 AM
To: Scott Bloom <scott at towel42.com>; interest at qt-project.org
Subject: RE: Need some help tracking down an issue


It’s likely similar to the issue seen here:

Qt itself may use the global thread pool for certain parallelization, so if the
global thread-pool is fully occupied without letting any new tasks run
then you may experience some hanging.


From: Interest <interest-bounces at qt-project.org<mailto:interest-bounces at qt-project.org>> On Behalf Of Scott Bloom
Sent: fredag 14. april 2023 19:39
To: interest at qt-project.org<mailto:interest at qt-project.org>
Subject: [Interest] Need some help tracking down an issue

I have an opensource project that is Qt based, to find duplicate files.  It started as a learning experience for working with thread pools.

Its pretty much 100% functional, however, I have issues where the GUI is non-responsive to user activity.

If anyone has the time, and willingness to do a code review with me, please let me know.  You can see the project at http://github.com/towel42-com/FindDupe

Thanks in advance,

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