[Interest] Wrong position QStyleOptionProgressBar on macOS

John Weeks john at wavemetrics.com
Fri Mar 20 20:46:41 CET 2020


Roman-

Alot of QStyle code seems to think that all drawing will be done in a widget solely occupied by whatever it is that QStyle is drawing. I guess folks like you and me who try to use QStyle to get cross-platform control appearance for sub-rects of a widget aren't very common.

I finally did this for QStyleProgressBar:
 	QStyleOptionProgressBar options;
 		painter->translate(r.left, r.top);
		options.rect.moveTo(0,0);

A few QStyle things mess with the QPainter transformation matrix. In that case, the only thing I can find to work around the problems is to paint the QStyle object into a QImage or QPixmap, then draw that image wherever you need it.

I have filed bugs against some of these problems, and gotten very little attention.

-John Weeks

> On Mar 20, 2020, at 12:02 PM, Roman W├╝ger <roman.wueger at gmx.at> wrote:
> 
> Hello,
> 
> I use QStyleOptionProgressBar on macOS Catalina with Qt 5.14.1 and tried versions back to 5.11.3. 
> 
> In a Table the progressbar is always displayed in row 0 and column 0 which is wrong even the current row is 6 or something like that and column is 1 or similar.
> 
> Any hints on this issue?
> 
> Best Regards
> Roman 
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