Text of styled font is clipped

django.Reinhard

Hi,

I'm playing with styling a QTabWidget according this blog

and when I use font: bold; for selected texts, the text will be cut on both sides. Looks like tab does not use fontMetrics of styled font.
I tried different settings for padding and margin, but was not able to get clean text display.

I looked at docs of QTabBar - there's no special functions for font settings - just setFont from QWidget.

Is there a way to set font of selected tab directly without using stylesheet?

Christian Ehrlicher

Known problem: https://bugreports.qt.io/issues/?jql=text ~ "QTabBar text"

django.Reinhard

Whow! Know issue for about 5 years.
Guess this issue will never be fixed.

So I started to research for extending QTabWidget, but then I thought of something much simpler, almost ingenious. I wanted bigger padding around tab-text anyway, so I changed the function, that adds pages to the notebook to wrap the tab text with spaces.

Now I have clean visual impression :)

Dariusz

@django-Reinhard can you post fix? I'm hitting it too...

AhmedAlshawi

I have come across a similar issue but affecting the text on the bottom (see the p's and g's), and I can't seem to solve. Anyone have any idea?

I resolved the problem of text being clipped at the sides by adding spaces in at either end of the tab names. Not ideal but does the job.
e.g. " Clipping " instead of "Clipping"

raven-worx

the cleaner solution would be to intercept the size of the tab via a proxy style (but wont probably not work with a stylesheet style) or subclassing QTabBar and reimplement initStyleOption() (virtual since Qt6 only)
https://code.qt.io/cgit/qt/qtbase.git/tree/src/widgets/widgets/qtabbar.cpp?h=5.15.2#n245

django.Reinhard

@AhmedAlshawi said in Text of styled font is clipped:

I have come across a similar issue but affecting the text on the bottom (see the p's and g's), and I can't seem to solve. Anyone have any idea?

Don't change fontsize by stylesheet.
Instead use QWidget::setFont() like this:

  tw = new QTabWidget();
  tw->setFont(QFont(tw->font().family(), 16));

looks like:

You see - no vertical clipping :)
I don't use stylesheets for font-changes at all.
QTabBar was the first widget, I had to :(

@raven-worx said in Text of styled font is clipped:

he cleaner solution would be to intercept the size of the tab via a proxy style (but wont probably not work with a stylesheet style) or subclassing QTabBar and reimplement initStyleOption() (virtual since Qt6 only)

Well, that may be true.
When I digged into the sources, I thought I'd start to extend QSize QTabBar::tabSizeHint(int index) const
...

... but I decided not to spend too much time into patching Qt.
Especially as the workaround costs nothing and works like charming :)