[Qt-interest] Clues and Q's on missing DragDrop Indicator *between* Items

[Hostile Fork]

Hi Qt people :)

I've hit some similar problems to what others have reported with the  
drop indicator not showing up *between* items in views:

	http://www.qtcentre.org/forum/archive/index.php/t-419.html
	http://www.mail-archive.com/qt-jambi-interest@trolltech.com/msg01201.html
	http://lists.trolltech.com/pipermail/qt-jambi-interest/2008-June/000395.html

Since I couldn't find any resolution on the web, I decided to browse  
the Qt sources.  The "between" lines seem to get drawn in  
QAbstractItemView's dragMoveEvent:

	http://qt.gitorious.org/qt/qt/blobs/master/src/gui/itemviews/qabstractitemview.cpp#line1731

There's also a routine in QAbstractItemView's private implementation  
called "paintDropIndicator"...which isn't sensitive to the  
DropIndicatorPosition:

	http://qt.gitorious.org/qt/qt/blobs/master/src/gui/itemviews/qabstractitemview_p.h#line169

Whether that's a problem or not, it got me wondering if the theme or  
KDE could be painting over the line after it was drawn.  Sure enough,  
when I put this code in my main():

	QApplication::setStyle(new QWindowsStyle)

...it made it clearer what was going on.  The DropIndicator line was  
being obscured by the bitmap representing the drag object.  The reason  
it was so easy to obscure was that it was only being drawn on the edge  
of the single cell I was hovering over... not the entire row.

[My TreeView has  
setSelectionBehavior(QAbstractItemView::SelectRows)... but I didn't  
notice an analogous feature for making sure the drop indicator is  
applied to rows and not cells.]

Hope that sheds some light on this issue.  Does anyone have advice on  
a workaround?

Thanks!
Brian

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