How To Close QDialog and Show MainWindow When User username and password is correct?

Taz742

this is my dialog:

#include "user_panel.h"
#include "ui_user_panel.h"
#include "dal.h"
#include "QSql"
#include "QSqlDatabase"
#include "QDebug"
#include "mainwindow.h"
#include "user_all.h"

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

// this->setWindowFlags(Qt::CustomizeWindowHint);
}

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

void user_panel::on_login_clicked()
{
QString user ="", pass ="";

user = ui->username->text();

pass = ui->password->text();

user_all* me = new user_all();

if(me->user_searched(user,pass)){
    qDebug() << "YES";
}else{
    qDebug() << "NO";
}

}

void user_panel::on_quitt_clicked()
{
this->close();
}

this is my function, in my new user_all class:
bool user_all::user_searched(QString user, QString pass){

DAL* connect_dal = new DAL();

QSqlQuery query;

int count = 0;

if(query.exec("SELECT * FROM users WHERE USERNAME='"+user+"' AND PASSWORD='"+pass+"'")){
    while(query.next())
        count++;

    if(!count){
        return false;
    }else{
        return true;
    }
}

}

this main.cpp :

#include "mainwindow.h"
#include <QApplication>
#include "user_panel.h"
#include "user_all.h"
#include "QDebug"
#include "QPair"

int main(int argc, char *argv[])
{
QApplication a(argc, argv);

MainWindow w;

user_panel* panel = new user_panel();

panel->setModal(true);

if(panel->exec() == QDialog::Rejected){
    panel->close();
}else{
    // some code when is Dialog is Accepted
    w.show();
}

return a.exec();

}

mrjj

Hi
Seems ok
What happens and what is not working?

if(panel->exec() == QDialog::Rejected){
panel->close();
}else{
// some code when is Dialog is Accepted
w.show();
}

Should show login panel
and then mainwin

Taz742

@mrjj

I can not understand what happened to panel.exec() is accepted :/

mrjj

@Taz742

the exec() runs a local event loop and stay there as long as dialog is shown.
The exec() returns the dialog result. Accepted or rejected.
So you can use that to indicate if login was ok or not.
So inside code when you check password simply use
QDialog::accept() or QDialog::reject().

What part is unclear to you ?

Taz742

@mrjj
:( I could not understand. You can write an example? plz

mrjj

@Taz742
sample of ?
But u have the code?

its just ( in Login)
if ( PassWordOK() )
QDialog::accept();
else
QDialog::reject().

and in main

--
MainWindow w;

user_panel panel; // NO need to new it
panel.setModal(true);

if(panel.exec() == QDialog::Accepted){
panel.close(); // does it need this? Should be closed here.
w.show(); // show main
}else{
// password not ok
return 1; // leave dont start app
}

Taz742

@mrjj
its worked and SOLVED :)) , thank you man.

mrjj

@Taz742
Super :)
You can use QMessageBox if you want to inform the user that
no app is started as login was invalid.