Why my scrollbar track color is transparent?

raven-worx

@Ishaq-Khan
https://doc.qt.io/qt-5/stylesheet-examples.html#customizing-qscrollbar

Ishaq Khan

Don't you know stylesheets are inherited by child widgets in Qt? If I add:

t.verticalScrollBar().setStyleSheet('background: black')

It will still have no effect.

I think my question is not well understood, I am updating my question.

Thanks for your helping.

raven-worx

@Ishaq-Khan said in Why my scrollbar track color is transparent?:

Don't you know stylesheets are inherited by child widgets in Qt?

sure i know.
But not every part of a widget drawn is also a child widget, but a subcontrol inside the style painting the widget.
So go ahead and read my link again and adapt your stylesheet.

Ishaq Khan

@raven-worx
But at least stylesheets are inherited by sub-controls too. That was the point.

And again thanks for providing that link. I have already visited it before posting my question. I can't get any help from it.

Well I have updated my question. Please view the image provided or at least run my code to see the problem. Thanks.

raven-worx

@Ishaq-Khan said in Why my scrollbar track color is transparent?:

But at least stylesheets are inherited by sub-controls too. That was the point.

if the stylesheet contains subcontrol rules, if you want so.

Then try this stylesheet as a starting point and adapt it to your needs:

QWidget {
     background: black; 
     color: white; 
     font-size: 12pt
}

QScrollBar:horizontal {
    border: 2px solid grey;
    background: black;
    height: 15px;
    margin: 0px 20px 0 20px;
}
QScrollBar::handle:horizontal {
    background: white;
    min-width: 20px;
}
QScrollBar::add-line:horizontal {
    border: 2px solid grey;
    background: black;
    width: 20px;
    subcontrol-position: right;
    subcontrol-origin: margin;
}

QScrollBar::sub-line:horizontal {
    border: 2px solid grey;
    background: black;
    width: 20px;
    subcontrol-position: left;
    subcontrol-origin: margin;
}

Ishaq Khan

@raven-worx
But scrollbar track (or where scrollbar handle moves) is still not solid color. Its showing some pattern/texture. You can see it in image I provided.

raven-worx

@Ishaq-Khan
what platform?
what OS?
did you set any other stylesheet somewhere else?

Ishaq Khan

@raven-worx
My Python version is 3.7.
My computer OS is Windows 10 (x64).
No, I have not set any more CSS somewhere else in the script too; The code I provided is a complete code.

I have used stylesheets a lot and have much experience with it. But this problem appears to be not related to stylesheets. But still can't say its a bug. Maybe I (or we) have insufficient knowledge to understand and solve this.

Please help me, this is one of few problems holding my project from to be completed.

mrjj

Hi
It seems you mean like this
alt text
Please see here.
https://stackoverflow.com/questions/17935691/stylesheet-on-qscrollbar-leaves-background-of-scrollbar-with-checkerboard-patter
(its actually covered by mr @raven-worx but just in case)

Tested on windows 10
alt text

Ishaq Khan

@mrjj Thank you very much! Problem solved.