#include <QObject>
#include <QtSQL/qsql.h>
#include <qstring.h>
#include "mainwindow.h"

class sservice : public QObject
{
    Q_OBJECT
public:
    explicit sservice(QObject *parent = 0);
signals:
    void Error(QString text);   // Сообщение об ошибке

public slots:
    void SamSetSrv(QString NewSrv);
    
private:
    QString CurrSRV;    // Текущий сервер
    int CurrPort;       // Текущий порт
    QString CurrDB;     // Текущая БД
    QString CurrUSR;    // Текущий юзор
    QString CurrPWD;    // Текущий пароль
    int m_value;
};

#endif // SSERVICE_H

#include "sservice.h"

sservice::sservice(QObject *parent) :
    QObject(parent)
{
}

void sservice::SamSetSrv(QString NewSrv) {  
    CurrSRV=NewSrv;
    emit Error(CurrSRV);

}

QObject::connect(ui->lineEdit, SIGNAL(textChanged(QString)), &sserv, SLOT(SamSetSrv(QString)));
QObject::connect(&sserv, SIGNAL(Error(QString)), ui->lineEdit_2, SLOT(hide()));

QObject::connect(ui->lineEdit, SIGNAL(textChanged(QString)), &sserv, SLOT(SamSetSrv(QString)));
QObject::connect(&sserv, SIGNAL(Error(QString)), ui->statusBar, SLOT(showMessage(QString)));

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "sservice.h"
#include <QDialog>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    sservice sserv;
    
    ui->setupUi(this);

    QObject::connect(ui->lineEdit, SIGNAL(textChanged(QString)), &sserv, SLOT(SamSetSrv(QString)));
    QObject::connect(&sserv, SIGNAL(Success(QString)), ui->statusBar, SLOT(showMessage(QString)));
}

MainWindow::~MainWindow()
{
    delete ui;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT
    
public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();
    
private slots:


private:
    Ui::MainWindow *ui;
    sservice sserv;

};

class sservice : public QObject
{
    Q_OBJECT
public:
    explicit sservice(int engine = EN_MYSQL, uchar mask = 0x00);

//=======разные другие объявления===========
    int CurrEngine;     // Текущий движок БД
    uchar Mask;         // Если всё верно, то маска будет 00011111 = 0x1F
}

sservice::sservice(int engine, uchar mask) 
    
{   
    sservice::CurrEngine=engine;
    sservice::Mask=mask;
}

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    
    ui->setupUi(this);
    sservice *samServ = new sservice(EN_MYSQL);

    QObject::connect(ui->samSrv, SIGNAL(textChanged(QString)), samServ, SLOT(setSrv(QString)));
}

private:
  sservice *samServ;

void MainWindow::on_clrDublAttach_clicked()
{
    QSqlQuery result;
    result = samServ->query("SELECT * FROM Client WHERE Client.`id`=4104");
    if (result.lastError().number()==-1) {
        qDebug() << result.value(0).toString();
    }
}

sservice *samServ = new sservice(EN_MYSQL);

QSqlQuery sservice::query(QString Query){
        
    QSqlQuery res(db);
    if (db.isOpen()) {
         if (!Query.isEmpty()) {
             res.exec(Query);
             if (res.lastError().number()==-1) {
                    res.next();
             } else {
                 emit error(res.lastError().text());
             }
         } else {
             emit error("Empty query!");
         }
     } else {
         emit error("DB is not opened!");
         emit connected(false);
     }
   return res;

}

class sservice : public QObject
{
    Q_OBJECT
public:
    explicit sservice(int engine = EN_MYSQL, uchar mask = 0x00);
    //QObject *parent = 0,
    ~sservice();
    QSqlQuery query(QString Query);

блаблабла

}

                                                                                            -lboost_thread-mgw44-mt-d-1_55 \
                            -lsetupapi \