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[Splatify]

Hi all I'm relatively new at this qt programming so please bear with me

What I have been trying to do for hours now is close a login dialog and open a Mainwindow.

On the login Dialog i have a button. What i want is for this button to close the login Dialog (logindialog) and open the main form (userwindow). here's my code so far:

main.cpp:

#include <QtGui/QApplication>
#include "logindialog.h"
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    LoginDialog w;
    w.show();
 
    return a.exec();
}

#include <QtGui/QApplication>
#include "logindialog.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    LoginDialog w;
    w.show();

    return a.exec();
}

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logindialog.h:

#ifndef LOGINDIALOG_H
#define LOGINDIALOG_H
 
#include <QDialog>
 
namespace Ui {
    class LoginDialog;
}
 
class LoginDialog : public QDialog
{
    Q_OBJECT
 
public:
    explicit LoginDialog(QWidget *parent = 0);
    ~LoginDialog();
 
private:
    Ui::LoginDialog *ui;
 
private slots:
    void on_SubmitButton_clicked();
};
 
#endif // LOGINDIALOG_H

#ifndef LOGINDIALOG_H
#define LOGINDIALOG_H

#include <QDialog>

namespace Ui {
    class LoginDialog;
}

class LoginDialog : public QDialog
{
    Q_OBJECT

public:
    explicit LoginDialog(QWidget *parent = 0);
    ~LoginDialog();

private:
    Ui::LoginDialog *ui;

private slots:
    void on_SubmitButton_clicked();
};

#endif // LOGINDIALOG_H

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userwindow.h:

#ifndef USERWINDOW_H
#define USERWINDOW_H
 
#include <QMainWindow>
 
namespace Ui {
    class UserWindow;
}
 
class UserWindow : public QMainWindow
{
    Q_OBJECT
 
public:
    explicit UserWindow(QWidget *parent = 0);
    ~UserWindow();
 
private:
    Ui::UserWindow *ui;
};
 
#endif // USERWINDOW_H

#ifndef USERWINDOW_H
#define USERWINDOW_H

#include <QMainWindow>

namespace Ui {
    class UserWindow;
}

class UserWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit UserWindow(QWidget *parent = 0);
    ~UserWindow();

private:
    Ui::UserWindow *ui;
};

#endif // USERWINDOW_H

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logindialog.cpp:

#include "logindialog.h"
#include "ui_logindialog.h"
#include <QtGui>
 
using namespace std;
 
LoginDialog::LoginDialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::LoginDialog)
{
    ui->setupUi(this);
}
 
LoginDialog::~LoginDialog()
{
    delete ui;
}
 
void LoginDialog::on_SubmitButton_clicked()
{
    /* Code is here for checking username and password 
        Want the userwindow to open and the logindialog to close */
 
 
 
}

#include "logindialog.h"
#include "ui_logindialog.h"
#include <QtGui>

using namespace std;

LoginDialog::LoginDialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::LoginDialog)
{
    ui->setupUi(this);
}

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

void LoginDialog::on_SubmitButton_clicked()
{
    /* Code is here for checking username and password 
        Want the userwindow to open and the logindialog to close */
    

    
}

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userwindow.cpp:

#include "userwindow.h"
#include "ui_userwindow.h"
 
UserWindow::UserWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::UserWindow)
{
    ui->setupUi(this);
}
 
UserWindow::~UserWindow()
{
    delete ui;
}

#include "userwindow.h"
#include "ui_userwindow.h"

UserWindow::UserWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::UserWindow)
{
    ui->setupUi(this);
}

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

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I have tried loads of different things from loads of different posts on loads of different forums. Perhaps i'm doing something fundamentally wrong :S Any code snippets would be greatly appreciated!!


Also on a side note, how come i have to use ui->label->settext() and most of the tutorials just use label->settext() ???

Thanks for your time and trouble. Much appreciated!!