QScrollArea static background-image and QLabels

SHRED4RED

I use style sheet such a:

QWidget
{
background-attachment: fixed;
background-repeat: none;
background-image: url(:/unary_function.PNG);
}

result on the screen:

I know that i can use for example QScrollArea > QWidget > QWidget but then style sheet will be apply for widgetScrollAreaContents and "background-attachment: fixed" execute wrong. All are ok. But not need apply background-image for labels on QScrollArea!!! ...

Help me pls

mrjj

Hi
QLabels are also QWidgets.
You must specify better whom you want affected.
Using QWidget as selector will take all.

If you only have one scrollarea , maybe you can use use names ?

You could also try
QLabel{} in end of stylesheet.

SHRED4RED

@mrjj You are right. But I try used QWidget#scrollArea or QScrollArea#scrollArea - but nothing. there is no image at all.
Note: I write style sheet in Design

mrjj

@SHRED4RED

You set stylesheet on ScrollArea or on mainwindow?

try QLabel{} in end of stylesheet for fast test. might just work.

SHRED4RED

@mrjj I already tried.
QWidget {...} Qlabel {empty or background-image: none}

But widgetScrollAreaContents is parent for QLabels. And QLabel copy properties.

set stelysheet on ScrollArea

mrjj

@SHRED4RED
Yep, stylesheets are always cascading. and when selector is QWidget, all children
are affected.

If you set a background color QLabel last in sheet. does it show ?

SHRED4RED

@mrjj doesn't show it.

Okey, mb you can explain me: when I use

QWidget
{
...
}
style sheet set for all widgets.

but why when I use QScrollArea {...} picture doesn't show at all. Why?
Which widget does set style sheet and show picture? I try QAbstractScrollArea - none, QAbstractScrollArea > QWidget - none, QAbstractScrollArea > QWidget > QWidget = widgetScrollAreaContents - is wrong for me, QAbstractScrollArea > QWidget > QWidget > QWidget = my labels . Okey, but where QWidget which show picture, when i use QWidget{...} because it execute good for me (static picture in area, but bad than Qlabel use properties too :( how i can find this a right QWidget? )

mrjj

Hi
QScrollArea might not draw background at all.
its scrollAreaWidgetContents you can see.
#scrollAreaWidgetContents {
background-color: rgb(255, 255, 0);
}
does set color.

mrjj

Ok it does seem to clear background.
alt text

had to change QscrollArea to transparent to see through.
But scrollAreaWidgetContents covers all area so its that you see.

SHRED4RED

@mrjj sorry for my stupidity... Thank you so much

mrjj

@SHRED4RED
Its not stupid. :)
StyleSheets is a bit tricky and sometimes its not apparent whom draw what where.
Like Views have a viewport object and QScrollArea also have an internal helper widget.
and i really wish we could write
QWidget, !QLabel {
}
There is some negative/reverse selectors but did not work for me.

SHRED4RED

@mrjj You helped me a lot. Just scrollAreaWidgetContents didn't are transparent... But I didn't understand it . Thank you very much for your time and advice!!!

mrjj

@SHRED4RED
Np. that's why i hang out here.
Remember to mark it solved :)
(ps i bumped your reputation so you dont have to wait x mins to answer)