Thanks for the replies and apologies for the late response. I'm having a very busy period. I have in the meantime submitted a bug report: https://bugreports.qt.io/browse/QTBUG-73177

@SGaist said in Heavy flickering in QListView when appending items if VerticalScrollBarPolicy == Qt::ScrollBarAlwaysOff:

Qt 5.12.1 just got released, can you check again if you still have the same problem ?

Yes, I did check 5.12.1 and nothing has changed. I've updated my bug report accordingly.

@VRonin said in Heavy flickering in QListView when appending items if VerticalScrollBarPolicy == Qt::ScrollBarAlwaysOff:

d_cancel is a race condition, change its type to std::atomic_bool
What I suspect is happening is that this intersect check is not working correctly when you disable the scrollbars

Thanks, I just wrote that little example code quickly and indeed, d_cancel could lead to problems (though not very likely). rest assured, in the actual project where I'm seeing this problem, the equivalent bool is already a std::atomic_bool.

Thanks for the hint as to where the problem is, I will try to investigate.

I have tried to install the debug packages of qt on my machine, but the easiest way to do so, they overwrite the normal packages and make my desktop unusable (since I'm running KDE which uses qt). So I need to figure out how to install a second, separate version or try to debug on a different (virtual) machine. Either way, just getting it set up will take more time than i have had lately. To be continued.

Thanks again!

@mrjj Thakn you.

try the following:

QMargins m = scrollArea->getContentsMargins(); m.setRight( m.right() + 10 ); scrollArea->setContentsMargins( m );

See https://bugreports.qt.io/browse/QTBUG-49549

@PhTe flickableItem is your friend here. It could be done as follows:

//Inside some TableView flickableItem.onContentYChanged: { mirror.flickableItem.contentY = flickableItem.contentY //mirror = id of other table }

Thank you. It worked.

@SGaist
The QSizePolicy is set to Expanding, because I want the table should take all the space by default. Anyway I tried to set it to Minimum but nothing changes. It seems something force the minimum size of the table, but I printed out the actual minimumSize value and is set to 0, even after adding the contents.

Hi and welcome
I think you might need to set margin for inner area
The following works for me with 32x32 images for the ends

/*inner area*/ QScrollBar::vertical { border: 1px solid #a5a5a5; background: none; width: 65px; margin: 42px 0 42px 0; /* match top/lower area*/ } /*the knob*/ QScrollBar::handle:vertical { background: #d5d5d5;; border: 2px solid #000000; min-height: 60px; border-radius: 12px; } /*lower arrow area*/ QScrollBar::add-line:vertical { border: 0px solid grey; background: NONE; height: 40px; subcontrol-position: bottom; subcontrol-origin: margin; } /*top arrow area*/ QScrollBar::sub-line:vertical { border: 0px solid grey; background: none; height: 40px; subcontrol-position: top; subcontrol-origin: margin; } /*arrows*/ QScrollBar::up-arrow:vertical { image: url(:/GFX/sbar/up_arrow_scrollbar.png); } /*pressed*/ QScrollBar::up-arrow:vertical::pressed { image: url(:/GFX/sbar/up_arrow_scrollbar_pressed.png); } QScrollBar::down-arrow:vertical::pressed { image: url(:/GFX/sbar/down_arrow_scrollbar_pressed.png); } QScrollBar::down-arrow:vertical { /* border: 2px solid grey; width: 3px; height: 23px; */ image: url(:/GFX/sbar/down_arrow_scrollbar.png); } QScrollBar::add-page:vertical, QScrollBar::sub-page:vertical { background: none; }

Hi,

The focus changed when you clicked the button. What you can do is to keep track on the currently focused QLineEdit in a member variable so you can use it at deletion time. Or you could add a remove button besides your QLineEdit and use that to remove them.