Bug with Qt 5.4.1 drag and drop between two QTreeWidgets
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Hi Everyone,
I think I might have encountered a bug in Qt 5.4.1, but I'd prefer someone more competent than me would confirm it.
I was a little bit worried when I converted to 5.4.1, I did skip 5.4 because I read on LXDE blog that he encountered problems with drag and drop here is a quote from his blog:
Avoid Qt 5.4.0 if possible:
We encountered several weird regression bugs of Qt 5.4 while debugging LXQt. It breaks drag and drop crossing different programs. With Qt 5.4, >you cannot drag a file from my file manager to other programs, but it’s not my fault. :-)
(The bug will be fixed in Qt 5.4.1, which is not yet released.)The problem is drag and drop between two QTreeWidgets, items created and dragged only in the same widget I think works, but once you drag the items from widget A to widget B, it looses it's children which were in widget A. And also, the items now which were dragged in widget B are glitching a lot.
Whenever, you try to drag an item into a parent, the last one in the list will disappear no matter what you do, copy, move etc.Here is an illustration of what is going on, once you moved items from widget A to widget B:
I also made a tiny example code which has the bug:
http://morf.lv/qt/dragdrop/treewidgettest.zipI've tested that the bug is present when compiling with:
Qt5.4.1 MSVC2010 OpenGL 32Bit
Qt5.4.1 MSVC2013 32Bit
Qt5.4.1 MSVC2013 64Bit
Qt5.4.1 MSVC2013 OpenGL 64BitThere is no bug, when I compiled it on Qt 5.3:
Qt5.3.0 MSVC2010 OpenGL 32Bit
Qt5.3.0 MSVC2010 OpenGL 64Bit
Qt5.3.0 MSVC2013OpenGL 32Bit
Qt5.3.0 MSVC2013 OpenGL 64BitCould anyone please confirm that this is a bug, and have any suggestions to fix it, or should I just go back to qt 5.3?
Kind Regards
Raivis (in old forum "xcoder")