QPainter logs in stdout

[Jaime Torres]

On Miércoles 04 Noviembre 2009 07:06:47 Mark Kretschmann escribió:
> On Sat, Oct 17, 2009 at 8:34 AM, Jaime Torres <jtamate at gmail.com> wrote:
> > Hi,
> > 
> >  Has someone else seen these logs?
> > 
> > QPainter::begin: Widget painting can only begin as a result of a
> > paintEvent QPainter::translate: Painter not active
> > QPainter::setClipRect: Painter not active
> > QPainter::hasClipping: Painter not active
> > QPainter::hasClipping: Painter not active
> > QPainter::setPen: Painter not active
> > QPainter::setBrush: Painter not active
> > QPainter::drawRects: Painter not active
> > QPainter::hasClipping: Painter not active
> > QPainter::setPen: Painter not active
> > QPainter::setBrush: Painter not active
> > QPainter::drawRects: Painter not active
> > 
> >  Has someone any idea where the problem could be?
> >  Is there any way to know the stack in that QPainter logs to know where
> > to search for the problem?
> 
> In fact this _could_ also have a completely different reason, that is
> a bug in QGraphicsView. Alexis Menard recently fixed it for us (which
> we are very thankful for, as it made Amarok crash). The patch should
> arrive in the 4.6 Git repository from Nokia soon.
> 
> That said, it's perfectly possible that what happens here is simply
> misuse of QPainter, as others said. But this Qt bug exposes the same
> symptoms.
> 
> https://bugs.kde.org/show_bug.cgi?id=207382

I have more information about this little problem (On branch 4.6-stable-patched).
When I have a khtml instance running (konqueror, akregator or kmail),
When I select something in any window (even in an xterm),
I see (in this case konqueror):

konqueror(28182)/khtml (caret) DOM::Selection::validate: Selection[ Position( 0x0 "null" : 0 ) Position( 0x0 "null" : 0 ) Position( 0x0 "null" : 0 ) Position( 0x0 
"null" : 0 ) 1 ] 0
konqueror(28182)/khtml (caret) DOM::Selection::validate: [character:baseIsStart] true Position( 0x0 "null" : 0 ) Position( 0x0 "null" : 0 )

And then, after any window focus change:
QPainter::begin: Paint device returned engine == 0, type: 2
QPainter::setPen: Painter not active
QPainter::setFont: Painter not active
QPainter::end: Painter not active, aborted

I hope this helps.

Best Regards and Happy year 2010.
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