@mzimmers True that the second one does not work. Sorry! I tested it and saw it worked. I must have done something differently. I will check it out later.

I got an answer that fixes the problem on Stackoverflow https://stackoverflow.com/a/75522782/5134351

Don't you have access to the source code ?
And if not, ask the authors ?

@suslucoder

If your files all have the same structure (separator, data etc.), yes, you should actually.

Calling the base class implementation did the trick. Thank you again!
I didn't try the resizeToContents as some cells shouldn't be sized to their content in some context.

@Quawetim I don't know which is better. For my comprehension, it is easier to use implicitHeight/implicitWidth of the item to be scrolled.

For example, when the item is a ListView, implicitHeight is automatically updated when an element from the ListView is changed/added/removed.
Your View item only have to set implicitHeight/implicitWidth and dynamically the ListView will adapt the scollbars limits/positions

@lansing
I'm not sure what you are trying to achieve.
Normally, I would calculate the correct bounding rect (and ideally cache the result as long as nothing changes, so calls to boundingRect() stay fast)

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.

Worth linking this topic to the answer documented on StackOverflow: https://stackoverflow.com/questions/46886443/scrollable-qml-charts

try the following:

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

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

I found it very helpful

@N-Sumi @gabor53 Hey, Sorry I get that this is quite old post. But asking incase if you have a solution. I understood how to add this in code and get it. But is there a way to set this property in QtDesigner? So that every time I modify my design, I need not type explicitly in the generated code. I cannot find this property. Could you please let me know if we can do this in Qt designer

@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; }