How to open MainWindow from Dialog

Echo773

#include "options.h"
#include "ui_options.h"
#include "mainwindow.h"




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

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

void Options::on_pushButton_2_clicked()
{
    this->close();
    MainWindow w;
    w.show();
}

This executes without errors but does nothing, im trying to reopen the main window from a dialog window

sierdzio

MainWindow w;
This constructs an entirely new MainWindow, puts it on the stack. Then 2 lines later the scope ends } and your main window is destroyed.

You should rather pass a pointer to your actual MainWindow instance when creating the dialog, and then show it when pushButton2 is clicked.