not running the application program

[sudheer]

hello all, i had made simple dilalog form in Qt designer and in that form i put the single pushbutton , then i wanted to run a application program by clicking the pushbutton

but it is not running, and my code is like this

#include<QtGui>
#include<QtCore>
#include<QApplication>
#include"ui_MainWindow6.h"
 
 
class image6 : public QMainWindow,private Ui::MainWindow6
 
{
  Q_OBJECT
 
 public:
 
    image6::image6()
 {
    setupUi(this); 
 
    connect(pushButton1,SIGNAL( click() ),this,SLOT( startxterm() ));
 }
 
 private slots:
 
 void image6::startxterm()
 
 {
   // QProcess *proc; 
    proc = new QProcess( this ); 
   // proc->start("/usr/bin/xterm");
     proc->execute("/usr/bin/xterm");
 }
 
private:
    QProcess *proc;
 
}; 
 
 
int main( int argc, char *argv[] )
{
  QApplication app(argc,argv);
  image6 *dialog6 = new image6;
  dialog6->show();
  return app.exec();
}
 
#include "main.moc"

#include<QtGui>
#include<QtCore>
#include<QApplication>
#include"ui_MainWindow6.h"


class image6 : public QMainWindow,private Ui::MainWindow6
 
{
  Q_OBJECT
 
 public:

    image6::image6()
 {
    setupUi(this); 

    connect(pushButton1,SIGNAL( click() ),this,SLOT( startxterm() ));
 }

 private slots:

 void image6::startxterm()

 {
   // QProcess *proc; 
    proc = new QProcess( this ); 
   // proc->start("/usr/bin/xterm");
     proc->execute("/usr/bin/xterm");
 }

private:
    QProcess *proc;

}; 
  

int main( int argc, char *argv[] )
{
  QApplication app(argc,argv);
  image6 *dialog6 = new image6;
  dialog6->show();
  return app.exec();
}

#include "main.moc"

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******************************************

and while making it giving some warning as

/usr/local/Trolltech/Qt-4.3.2/bin/moc -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/local/Trolltech/Qt-4.3.2/mkspecs/linux-g++ -I. -I/usr/local/Trolltech/Qt-4.3.2/include/QtCore -I/usr/local/Trolltech/Qt-4.3.2/include/QtCore -I/usr/local/Trolltech/Qt-4.3.2/include/QtGui -I/usr/local/Trolltech/Qt-4.3.2/include/QtGui -I/usr/local/Trolltech/Qt-4.3.2/include -I. -I. -I. main.cpp -o main.moc
main.cpp:30: Warning: Function declaration image6::startxterm contains extra qualification. Ignoring as signal or slot.
g++ -c -pipe -O2 -Wall -W -D_REENTRANT -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/local/Trolltech/Qt-4.3.2/mkspecs/linux-g++ -I. -I/usr/local/Trolltech/Qt-4.3.2/include/QtCore -I/usr/local/Trolltech/Qt-4.3.2/include/QtCore -I/usr/local/Trolltech/Qt-4.3.2/include/QtGui -I/usr/local/Trolltech/Qt-4.3.2/include/QtGui -I/usr/local/Trolltech/Qt-4.3.2/include -I. -I. -I. -o main.o main.cpp
g++ -Wl,-rpath,/usr/local/Trolltech/Qt-4.3.2/lib -o filebrowser6 main.o -L/usr/local/Trolltech/Qt-4.3.2/lib -lQtGui -L/usr/local/Trolltech/Qt-4.3.2/lib -L/usr/X11R6/lib -lpng -lSM -lICE -pthread -pthread -lXi -lXrender -lXrandr -lXfixes -lXcursor -lXinerama -lfreetype -lfontconfig -lXext -lX11 -lQtCore -lz -lm -pthread -lgthread-2.0 -lglib-2.0 -lrt -ldl -lpthread

[marcel]

execute is static in QProcess, so there's no need to use it with an instance.
What does execute returns?

[Khal Drogo]

I think the problem is that click() is not a signal, its a slot.
Try changing the click() to clicked().

[sudheer]

it returns nothing

[marcel]

I think the problem is that click() is not a signal, its a slot.
Try changing the click() to clicked().

Yes, that's it.

[sudheer]

Khal Drogo --------------

yes ur right, that signal should be clicked() instead click()

but though i changed the signal name properly, application is not running

any more suggessions ........................................

[ChristianEhrlicher]

Q_OBJECT / class definition should be in a header and not in source file. Otherwise qmake/moc will not recognize Q_OBJECT macro.
Move it to a header and add it to HEADERS in your pro-File.

/edit: Also you'll see a Qt warning on executing your programm (after you clicked on your button) which points you to this problem.

[sudheer]

Q_OBJECT / class definition should be in a header and not in source file. Otherwise qmake/moc will not recognize Q_OBJECT macro.
Move it to a header and add it to HEADERS in your pro-File.

/edit: Also you'll see a Qt warning on executing your programm (after you clicked on your button) which points you to this problem.

i also tried like u said but it din't works

again giving warning as usaully

[ChristianEhrlicher]

And you should learn a little bit c++

image6::image6() in a class definition is not needed (and some compiler refuse this)

just use
image6()
and separate implementation and definition of the class!

[sudheer]

ChristianEhrlicher ------------------------

heyyy sorry friend, for my last post, actually ur right. I divide the project into 3 files (.h,.cpp,main.cpp) but wat the mistake i does is ----- in header file's class declaration
i am declare member fun' with class name

now i am able run my application very easily

thanks

[sudheer]

and one more thing I forgot that , in my above program ther is no need of putting scope operator( :: ) with class name since withing the class declaration i have define member function. so whenever the member function define outside class declaration we should use
the scope operator

ya my correct ChristianEhrlicher?????

[ChristianEhrlicher]

Yes, that's correct

foo::foo() inside a class definition is not needed / can confuse the compiler or moc from Qt