he is know give an error from the line I add, he wrote:
/main.cpp:10: error: expected constructor, destructor, or type conversion
before '*' token
../main.cpp:11: error: 'QString' does not name a type
../main.cpp:12: error: expected constructor, destructor, or type conversion
before '*' token
../main.cpp:13: error: expected constructor, destructor, or type conversion
before '*' token
for this prgoram:
/****************************************************************
**
** Qt tutorial 1
**
****************************************************************/
QApplication *qApp;
QString QString::null="";
QStringData *QString::shared_null=0;
QWidget *QApplication::main_widget = 0;
#include <qapplication.h>
#include <qpushbutton.h>
int main( int argc, char **argv )
{
QApplication a( argc, argv );
qApp = &a;
QPushButton hello( "Hello world!", 0 );
hello.resize( 100, 30 );
a.setMainWidget( &hello );
hello.show();
return a.exec();
}
I think I dont understand you, what I do wrong?
thanks
NB
On 11/16/06, Dieter Pfeffer <[EMAIL PROTECTED]> wrote:
I had the same problems a time ago - try:
QApplication *qApp;
QString QString::null="";
QStringData *QString::shared_null=0;
QWidget *QApplication::main_widget = 0;
int main( int argc, char **argv )
{
QApplication a( argc, argv );
qApp = &a;
....
Dieter
Unclassified Mail
-------------------------
-----Original Message-----
*From:* [EMAIL PROTECTED] [mailto:
[EMAIL PROTECTED] Behalf Of *benny porat
*Sent:* Thursday, 16 November, 2006 15:49
*To:* osg users
*Subject:* Re: [osg-users] GUI
I found this toturial
http://doc.trolltech.com/3.3/tutorial1-01.html
I try to compile it (I work with eclipse)
and I get error that I dont understand what to do
I gat error for every kine in the main:
undefind reference to 'QString::shared_null....
.
.
undefind reference to 'QApplication::QApplication(int&,char **)'
...
and so on...
I think that it something with the configure of the build?
do you know what I need to do?
thanks
NB
On 11/16/06, Robert Osfield <[EMAIL PROTECTED]> wrote:
>
> Hi Garret,
>
> On 11/16/06, Garrett Potts <[EMAIL PROTECTED]> wrote:
> > I am not sure of other peoples experiences. The visualization system
> I am
> > running based on OSG is very smooth on the Qt 4.1.4 version but when I
> > upgraded to 4.2 and without changing a line of code and just do a
> re-compile
> > the scene became very Jerky. Playing with Qt's timer interval it
> became
> > better but never looked into it further.
> >
> > Not sure if this information is useful but I am also curious if others
> have
> > experienced similar problems.
>
> I haven't seen this, but it sounds like the timer has been given a
> lower priority or simply implemented differently.
>
> Using GUI timers to drive redraws isn't ideal, for solid framerates
> you really need to run a separate graphics thread. For any serious
> vis-sim work this is essential. For interactive apps GUI timers will
> often suffice, but as you've found out you are at the mercy of the
> Windowing toolkits implementation of its timers.
>
> Robert.
> _______________________________________________
> osg-users mailing list
> [email protected]
> http://openscenegraph.net/mailman/listinfo/osg-users
> http://www.openscenegraph.org/
>
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