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Code: Alles auswählen

#include <Qt/QtGui>
#include <Qt/qprocess.h>


int main(int argc, char *argv[]) {
    
    //needed vars
    QApplication app(argc, argv);
    QProcess *mp3gain = new QProcess();
    QString mp3gain_version;
    
    //start mp3gain and check for version
    mp3gain->execute("mp3gain -v");

    while ( mp3gain->waitForFinished() ) {
        mp3gain_version = mp3gain->readAll();
    }
    
    return app.exec();
}

Code: Alles auswählen

    //start mp3gain and check for version
    mp3gain->start("mp3gain -v");

    while ( mp3gain->waitForFinished() ) {
        mp3gain_version = mp3gain->readAllStandardError();
    }

Code: Alles auswählen

#include <Qt/QtGui>
#include "mainroster.h"
#include "quickwidget.h"
#include "process.h"

int main(int argc, char *argv[]){
    
    //needed vars
    QApplication app(argc, argv);
 
    //check mp3gain
    Process mp3gain;
    
    //all went fine so we create the widget now
    MainRoster main_widget;
    main_widget.show();

    return app.exec();
}

Code: Alles auswählen

#include "process.h"

Process::Process(){
    
    mp3gain = new QProcess;
    mp3gain->start("mp3gain -v");
    
    connect( mp3gain, SIGNAL( finished ( int, QProcess::ExitStatus )  ), this, SLOT(readOutput()) );
    
}

void Process::readOutput(){
    
    //compare string
    QString mp3gain_version;
   
    //get process output
    mp3gain_version = mp3gain->readAllStandardError();
    
    //compare the output, check the version
    int check = QString::compare(mp3gain_version, "mp3gain version 1.4.6");
    
    //chec the result, if 1 all is ok, else the were a problem with mp3gain
    if( check == 1 ){
        //create the window
    }
    else{
        QString error;
        error.setNum(check);
        QMessageBox::information(this, "Error", error);        
    }
 
}

Code: Alles auswählen

    MainRoster main_widget;
    main_widget.show();