[Qt-interest] No RTTI information for QTreeWidgetItem
Scott Aron Bloom
Scott.Bloom at sabgroup.com
Tue Jun 2 18:28:04 CEST 2009
Its really no different.. is it any different doing 5-10 (depending on
how many QTreeWidgetItem derived classes) if ( item->type() ) vs 5-10
castes?
Scott
From: qt-interest-bounces at trolltech.com
[mailto:qt-interest-bounces at trolltech.com] On Behalf Of Eric Clark
Sent: Tuesday, June 02, 2009 6:47 AM
To: qt-interest at trolltech.com
Subject: Re: [Qt-interest] No RTTI information for QTreeWidgetItem
I had a feeling that was the only solution. Thank you very much!
From: qt-interest-bounces at trolltech.com
[mailto:qt-interest-bounces at trolltech.com] On Behalf Of Scott Aron Bloom
Sent: Monday, June 01, 2009 5:27 PM
To: qt-interest at trolltech.com
Subject: Re: [Qt-interest] No RTTI information for QTreeWidgetItem
No it wont.. I missed that...
Instead do the following, make sure you set your Type during the
construction, and call QTreeWidgetItem::type() to figure out what type
of type it is
Scott
From: qt-interest-bounces at trolltech.com
[mailto:qt-interest-bounces at trolltech.com] On Behalf Of Eric Clark
Sent: Monday, June 01, 2009 2:08 PM
To: qt-interest at trolltech.com
Subject: Re: [Qt-interest] No RTTI information for QTreeWidgetItem
Scott,
Thank you for the response, but I would not have a problem using
qobject_cast, except that QTreeWidgetItem does not inherit QObject. Will
qobject_cast work on non-QObjects?
Eric
From: Scott Aron Bloom [mailto:Scott.Bloom at sabgroup.com]
Sent: Monday, June 01, 2009 4:04 PM
To: Eric Clark; qt-interest at trolltech.com
Subject: RE: [Qt-interest] No RTTI information for QTreeWidgetItem
Don't use RTTI on QT based objects... (in fact its rather unsafe when
crossing any DLL boundry on windows...) use qobject_cast
Scott
From: qt-interest-bounces at trolltech.com
[mailto:qt-interest-bounces at trolltech.com] On Behalf Of Eric Clark
Sent: Monday, June 01, 2009 1:05 PM
To: qt-interest at trolltech.com
Subject: [Qt-interest] No RTTI information for QTreeWidgetItem
Hello All,
I have a class that inherits QTreeWidgetItem. When I attempt to do a
dynamic_cast on a QTreeWidgetItem that was created using my subclass
BaseTreeWidgetItem I get an exception thrown by Microsoft C++ that says
the object is a __non_rtti_object. Has anyone seen this problem? If I
just cast the object instead of using a dynamic_cast everything works
just fine.
Thanks in advance!
Eric
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