Scrollbar background does not go solid (?) when using stylesheets

[Stukfruit]

As shown in the image attached, the following code gives me a scrollbar with a dotted background. I would like to make that background solid, but I can't seem to make Qt do that using the stylesheet mechanism.

I was wondering if someone knows if this is either a bug, if it's supposed to work like this or if there's a work-around.

I'm using Windows Vista, if that matters (I've noticed some other different behaviors as well, using Vista and Qt styles, that's why I mention it).

QScrollBar:horizontal {
	background-color: blue;
	border: 1px solid black;
	margin: 0px 16px 0px 16px;
}
 
QScrollBar::handle:horizontal {
	background: red;
	border: 1px solid yellow;
}
 
QScrollBar::add-line:horizontal {
	border: 1px solid black;
	background: purple;
	width: 16px;
	subcontrol-position: right;
	subcontrol-origin: margin;
}
 
QScrollBar::sub-line:horizontal {
	border: 1px solid black;
	background: purple;
	width: 16px;
	subcontrol-position: left;
	subcontrol-origin: margin;
}

QScrollBar:horizontal {
	background-color: blue;
	border: 1px solid black;
	margin: 0px 16px 0px 16px;
}

QScrollBar::handle:horizontal {
	background: red;
	border: 1px solid yellow;
}

QScrollBar::add-line:horizontal {
	border: 1px solid black;
	background: purple;
	width: 16px;
	subcontrol-position: right;
	subcontrol-origin: margin;
}

QScrollBar::sub-line:horizontal {
	border: 1px solid black;
	background: purple;
	width: 16px;
	subcontrol-position: left;
	subcontrol-origin: margin;
}

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[jpn]

What if you preview it in a different style, like plastique?

[Stukfruit]

Interesting! I didn't test all styles because I assumed they would all give the same results after I tried a few, but it appears that both the Motif and CDE styles are the only styles with correct and solid colored backgrounds for the scrollbar. The rest don't (Windows, Windows XP, Windows Vista, Cleanlooks, Plastique, ..)

I guess we're looking at a bug here?
(I'm using the snapshot from March 19th, by the way)

[jpn]

I guess we're looking at a bug here?
(I'm using the snapshot from March 19th, by the way)

I guess so, I suggest you send your findings at Qt4-preview-feedback Mailing List.