Do you say QStringList QSqlDatabase::connectionNames ()
returns anything after QSqlDatabase::close is called?
I believe in Qt 4.6 it worked on Windows.
You may try QSqlDatabase::removeDatabase
but it may cause some resource leeks if there are open queries.
Regards,
Alex
On Thu, Ap
Hi all,
I am having problems with an app that renders images in a qglwidget (qt
4.8.4) on a windows 7 pc using the aforementioned video card.
I thought there might be a problem in my code but even the 2d example from
qt distribution shows a black tile in the right (opengl) panel.
I obviously upgrad
Wow, that works! Thank you! Was the declaration the main thing that was
missing?
As for why I want to do this, I have a plan for application with quite
complex object tree, that will be stored in JSON. Classes structure will be
quite simple, only strings and integers. And writing the parsing logic
working main.cpp is attached. I am not sure why you want to do this.
From: Aekold Helbrass [helbr...@gmail.com]
Sent: Friday, April 05, 2013 5:59 PM
To: Pritam Ghanghas
Cc: Qt-interest Interest
Subject: Re: [Interest] QVariant cannot take custom type
Complete QtCre
Complete QtCreator project in attachment. I'm running it on QtCreator 2.7.0
and Qt 5.0.1, SUSE Linux 12.3.
On Fri, Apr 5, 2013 at 2:30 PM, Pritam Ghanghas wrote:
> can you send compilable code that reproduces this problem. I will try here.
>
> From:
> interest-
On 4/5/13 1:38pm, Bo Thorsen wrote:
> Den 05-04-2013 13:09, Sensei skrev:
>> By the way, and just for a thorough exploration of my code, is
>> QTreeWidgetItem *without icons* safe to be constructed in a separate
>> thread?
>
> Looking at the source code, it might actually work. But you will be
> de
Den 05-04-2013 13:09, Sensei skrev:
> By the way, and just for a thorough exploration of my code, is
> QTreeWidgetItem *without icons* safe to be constructed in a separate thread?
Looking at the source code, it might actually work. But you will be
depending on the internal implementation of QIcon
can you send compilable code that reproduces this problem. I will try here.
From: interest-bounces+pritam_ghanghas=infosys@qt-project.org
[interest-bounces+pritam_ghanghas=infosys@qt-project.org] on behalf of
Aekold Helbrass [helbr...@gmail.com]
Sent: Frid
Ok, I've tried this one:
QVariant var(QMetaType::QObjectStar, &item);
and it *almost* works. Pointer somehow gets crippled after using
QMetaProperty.write. When Item* is created originally - address is
0x1b952fo. But into Holder it is written as 0x1b95480.
Is is even possible? Maybe I'm
By the way, and just for a thorough exploration of my code, is
QTreeWidgetItem *without icons* safe to be constructed in a separate thread?
Thanks & Cheers!
___
Interest mailing list
Interest@qt-project.org
http://lists.qt-project.org/mailman/listinf
On 4/4/13 6:45pm, Alan Ezust wrote:
> The reason, simply, is that the graphics memory and the objects that
> reside in it are not thread-safe, and to make them thread-safe would
> cause a great performance impact, so Qt doesn't try.
> You can read more about this in the documentation, but in genera
use gdb and see where exactly it segfaults. That will give better pointers than
random guesses.
You can try posting backtrace here.
From: interest-bounces+pritam_ghanghas=infosys@qt-project.org
[interest-bounces+pritam_ghanghas=infosys@qt-project.org] on b
Thanx, that one was close, but still segfault:
QSharedPointer pointer(item);
QVariant var = QVariant::fromValue(pointer);
list.append(var);
On Fri, Apr 5, 2013 at 1:33 PM, Conti Manuele wrote:
> Hi All,
> There is a problem in your code, actually I use this and work
Hi All,
There is a problem in your code, actually I use this and work perfectly:
Q_DECLARE_METATYPE(QSharedPointer)
qRegisterMetaType< QSharedPointer >();
Bye
On 04/05/2013 12:27 PM, Samuel Gaist wrote:
> He explains how to handle QObject * so a pointer to QObject instance, not a
> QObject inst
He explains how to handle QObject * so a pointer to QObject instance, not a
QObject instance.
On 5 avr. 2013, at 12:22, Aekold Helbrass wrote:
> So, it is absolutely impossible to use QObject-derived class with QVariant?
> I'm storing QList of pointers already, and I want to write that with
>
So, it is absolutely impossible to use QObject-derived class with QVariant?
I'm storing QList of pointers already, and I want to write that with
QMetaProperty. The only thing that needs copy-constructor, in my
understanding, is qRegisterMetaType invocation.
I even read an article where guy explain
Op 5-4-2013 11:39, Sven Bergner schreef:
> Hello,
> you can use a custom type with QVariant by declaring it
> using Q_DECLARE_METATYPE ( Type ).
> Hope that helps.
>
It does not. That was already in the code posted in the opening post. As
noted by others, the issue lies with trying to use a QObje
Hello,
you can use a custom type with QVariant by declaring it
using Q_DECLARE_METATYPE ( Type ).
Hope that helps.
Regrads,
Sven
2013/4/5 Pritam Ghanghas
> QObjects are not supposed to be copiable, providing a copy constructor
> violates Qt's principle that QObject is an identity type. If yo
QObjects are not supposed to be copiable, providing a copy constructor violates
Qt's principle that QObject is an identity type. If you want to store QObjects
in QVariant store pointers to be them instead.
From: interest-bounces+pritam_ghanghas=infosys@qt-proj
I've provided copy-constructor, as was suggested in that article.
On Fri, Apr 5, 2013 at 10:50 AM, Samuel Gaist wrote:
> Hi,
>
> IIRC, you can't have Item or Holder in a QVariant because there QObject so
> the copy constructor is disabled for them.
>
> This thread might be of interest
> http://s
Hi,
IIRC, you can't have Item or Holder in a QVariant because there QObject so the
copy constructor is disabled for them.
This thread might be of interest
http://stackoverflow.com/questions/7872578/how-to-properly-use-qregistermetatype-on-a-class-derived-from-qobject
Hope it helps
On 5 avr. 2
Hi All!
Short story is: I'm trying to put custom type into QVariant and it doesn't
work, on debug I see QVariant with value and trying to
read it I'm getting segfault.
Long story, I'm new to Qt/C++ so I'm trying to do everything very
carefully, but I'm almost sure it's some rookie mistake in my
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