Running External c++ program when user hit ok button

[Ashwani]

process.h header file

#ifndef MYQTAPP_H
#define MYQTAPP_H
 
#include "ui_promo.h"
 
 
class myQtApp : public QWidget, private Ui::myQtAppDLG
{
    Q_OBJECT
 
public:
    myQtApp(QWidget *parent = 0);
 
 
public slots:
    void getPath();
    void run();
    void about();
 
};
 
 
#endif

#ifndef MYQTAPP_H
#define MYQTAPP_H
 
#include "ui_promo.h"
 
 
class myQtApp : public QWidget, private Ui::myQtAppDLG
{
    Q_OBJECT
 
public:
    myQtApp(QWidget *parent = 0);
 
 
public slots:
    void getPath();
    void run();
    void about();

};
 
 
#endif

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[Ashwani]

proocess.cpp main cpp file

#include <QtGui> 
#include "promo.h"
 
 
 
myQtApp::myQtApp(QWidget *parent)
{
    setupUi(this); // this sets up GUI
 
    // signals/slots mechanism in action
    connect( pushButton_browse, SIGNAL( clicked() ), this, SLOT( getPath() ) ); 
    connect( pushButton_run, SIGNAL( clicked() ), this, SLOT( run() ) );
    connect( pushButton_about, SIGNAL( clicked() ), this, SLOT( about() ) ); 
}
 
  QString path;
void myQtApp::getPath()           //browse button
{
 
 
    path = QFileDialog::getOpenFileName(
        this,
        "Choose a file to open",
        QString::null,
        QString::null);
    lineEdit->setText( path );
}
 
void myQtApp::run() //to run process
{
 
    int value1;
            QString str;
    QString combo;
 
 
 QProcess promo;
 promo.start("a.exe");            //my c++ compiled executable
promo.waitForStarted();
 
 
if(radioButton->isChecked())       //writing radio button values
    promo.write("1\n");
if(radioButton_2->isChecked())
    promo.write("2\n");
if(radioButton_3->isChecked())
    promo.write("3\n");
if(radioButton_4->isChecked())
    promo.write("4\n");
 
QString num = QVariant(spinBox1->value()).toString()+"\n";       //spin box value to string called num
       promo.write(num.toAscii().data());       //writing to QBytearrya ie convert from string to array
 promo.write(path.toAscii().data());
 
 
promo.closeWriteChannel();      //closing write channel
promo.waitForFinished();
 
}
 
 
 
 
void myQtApp::about()   //about button
{
    QMessageBox::about(this,"About Promotif",
                       "is running\n"
                );
}

#include <QtGui> 
#include "promo.h"
 

 
myQtApp::myQtApp(QWidget *parent)
{
    setupUi(this); // this sets up GUI
 
    // signals/slots mechanism in action
    connect( pushButton_browse, SIGNAL( clicked() ), this, SLOT( getPath() ) ); 
    connect( pushButton_run, SIGNAL( clicked() ), this, SLOT( run() ) );
    connect( pushButton_about, SIGNAL( clicked() ), this, SLOT( about() ) ); 
}
 
  QString path;
void myQtApp::getPath()           //browse button
{


    path = QFileDialog::getOpenFileName(
        this,
        "Choose a file to open",
        QString::null,
        QString::null);
    lineEdit->setText( path );
}

void myQtApp::run() //to run process
{

    int value1;
            QString str;
    QString combo;


 QProcess promo;
 promo.start("a.exe");            //my c++ compiled executable
promo.waitForStarted();


if(radioButton->isChecked())       //writing radio button values
    promo.write("1\n");
if(radioButton_2->isChecked())
    promo.write("2\n");
if(radioButton_3->isChecked())
    promo.write("3\n");
if(radioButton_4->isChecked())
    promo.write("4\n");

QString num = QVariant(spinBox1->value()).toString()+"\n";       //spin box value to string called num
       promo.write(num.toAscii().data());       //writing to QBytearrya ie convert from string to array
 promo.write(path.toAscii().data());


promo.closeWriteChannel();      //closing write channel
promo.waitForFinished();

}
 

 

void myQtApp::about()   //about button
{
    QMessageBox::about(this,"About Promotif",
                       "is running\n"
                );
}

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Thanks to http://sector.ynet.sk/qt4-tutorial/ and Talei thanks