Bug in Qt 5.12 drag n'drop ?
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Ok, I'm using Qt 5.12.0 Linux x86_64 downloaded directly from qt.io.
Apparently, this bug (behavior ?) doesn't seem to be listed in the bugs db.
I patched both QWidget::dragEnterEvent() and QWidget::dropEnterEvent() for a specific widget. It has been working for at least 10 years, but with 5.12.0 dragEnterEvent() is executed, and not dropEnterEvent().In my code, I used event->acceptProposedAction() instead of event->setAccepted(true), but it worked fine.
wrote on 14 Dec 2018, 21:19 last edited byI also tried the dnd robot example which uses event->setAccepted(true) in its dragEnterEvent(). It works but when I do the same in my code, zip...
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Can you spot any difference between the example and what you do in your application ?
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"not that different" can be a big can of worm ;)
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wrote on 14 Dec 2018, 22:42 last edited by skylendar
Ah, "robot" is based on a QGraphicsObject, which receives QGraphicsSceneDragDropEvent , whereas my app is based on a mere QWidget, which receives a QDragEnterEvent
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Ah, "robot" is based on a QGraphicsObject, which receives QGraphicsSceneDragDropEvent , whereas my app is based on a mere QWidget, which receives a QDragEnterEvent
wrote on 14 Dec 2018, 22:44 last edited byAnd remember, my code works fine with qt5.11.x, and not with qt5.12.0
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Please provide a example - otherwise I don't see how we can spot the problem...
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Please provide a example - otherwise I don't see how we can spot the problem...
wrote on 15 Dec 2018, 16:06 last edited byOk, in that case, get my open source app:
https://sourceforge.net/projects/skylendar/
and compile it with qt5.12.0
When compiled and running, drag the "Now" Dataset (on the left column) onto the window named "Standard wheel".Then, the pointer becomes a barred red circle, instead of a black hand for dropping, i.e. dropping is impossible.
When compiled with 5.11 apparently nothing happens because the standard wheel already uses "Now", but it works...
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I tried to run your app but I won't let something run as root on my system. Please provide a minimal, compilable example to reproduce the issue.
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I tried to run your app but I won't let something run as root on my system. Please provide a minimal, compilable example to reproduce the issue.
I tried to run your app but I won't let something run as root on my system.
probably the elevated rights are part of the problem?
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I tried to run your app but I won't let something run as root on my system.
probably the elevated rights are part of the problem?
@aha_1980 said in Bug in Qt 5.12 drag n'drop ?:
probably the elevated rights are part of the problem?
Don't think so - it's using a database and the app which creates the schema etc. wants admin rights. After this it looks like the normal application can run without admin rights but did not came that far.
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I tried to run your app but I won't let something run as root on my system.
probably the elevated rights are part of the problem?
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I tried to run your app but I won't let something run as root on my system.
probably the elevated rights are part of the problem?
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If you really are scared to run skydmin as root, I can tell you how to install the db as the postgres non-root user.
@skylendar Thanks, but I don't think I'll debug your program ;)
I have too much of my own problems
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@skylendar Thanks, but I don't think I'll debug your program ;)
I have too much of my own problems
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@skylendar Thanks, but I don't think I'll debug your program ;)
I have too much of my own problems
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@skylendar thats why we need a simple program, trimmed down to the actual problem.
Otherwise its hard to track down where the bug is. Until now it is not even proven that Qt is guilty.
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@skylendar thats why we need a simple program, trimmed down to the actual problem.
Otherwise its hard to track down where the bug is. Until now it is not even proven that Qt is guilty.
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@skylendar thats why we need a simple program, trimmed down to the actual problem.
Otherwise its hard to track down where the bug is. Until now it is not even proven that Qt is guilty.
wrote on 15 Dec 2018, 18:02 last edited byAnd you forget something: Qt is actually a commercial program, and most of you, if not all, are paid for debugging it. Why should I work for you for free ?
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