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

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

[Ishaq Khan]

@mrjj Thank you very much! Problem solved.