[SOLVED] How to access a slot from a different widget: If form1 clicks a button, form2 should respond.

[Jorge]

Hi,
I'm using two widgets in a stacked layout. the first one, mainWidget, is the one with said layout and therefore is the one in charge of "movement", meaning that it should receive a signal from is stacked widgets that the currentIndex should change.
The second widget, which is a login form, verifies the user and password from a SQLite database. The verification part is already done, although I still can't figure out how to tell the mainWidget (the one that controls the stackedlayout) that it should change the index.
To be clear, a button in the login form should be able to change the stack in mainWidget, but I couldn't do this either with accessors or connect().
Is there anyway to do this?
Thanks in advance.

[Jorge]

In case anyone wonders, I found the way to connect both classes and tell mainWidget to change stack through the login widget's button.

//header of the login widget
public slots:
    void verifyUser(int iUserCorrect )
    {
        if ( iUserCorrect != iUserVerified )
        {
            iUserVerified = iUserCorrect;
            emit valueChanged( iUserVerified );
        }
    }

signals:
    void valueChanged( int iUserCorrect );

private slots:
    void on_btnLogin_clicked();

private:
    Ui::QLogin *ui;
    QSqlDatabase sqlUsuarios;
    int iUserVerified;

source file of the login widget (only where valueChanged was used, in the SQLite verification):

iUserVerified = 0;

    QSqlQuery sqlQry;
    if(sqlQry.exec("SELECT User, Password, Role FROM Usuarios WHERE User=\'" + sUsername +
            "\' AND Password =\'" + sPassword + "\'"))
    {
        if(sqlQry.next())
        {
            ui->lblStatus->setText("Nombre de usuario y contraseña válidos.");
            qDebug() << "Usuario OK";
            verifyUser(1);
        }

and finally, the connect() in the mainWidget source file. Note that I had already made an instance of a promoted login widget inside this file:

#include "mainwidget.h"
#include "ui_mainwidget.h"
#include <qlogin.h>
#include <QMessageBox>
#include <QCalendarWidget>
#include <QDebug>
#include <QPushButton>

mainWidget::mainWidget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::mainWidget)
{
    mainLayout = new QVBoxLayout();

    stackedLayout = new QStackedLayout();

    QLogin *loginWidget = new QLogin;

    stackedLayout->addWidget(loginWidget);

    stackedLayout->addWidget(new QCalendarWidget);

    mainLayout->addLayout(stackedLayout);

    setLayout(mainLayout);

    connect(loginWidget, SIGNAL(valueChanged(int)),
             this, SLOT(changeStack()));

    ui->setupUi(this);
}

The changeStack method simply changes the index of the stack:

void mainWidget::changeStack()
{
    stackedLayout->setCurrentIndex(stackedLayout->currentIndex() + 1);
    qDebug() << "changeStack()";
}

Took me some time, but I finally got it.