initialprompt.cpp

#include "initalprompt.h"
#include "ui_initalprompt.h"
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QLineEdit>
#include <QCloseEvent>
#include <QMessageBox>

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

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

void InitalPrompt::keyPressEvent(QKeyEvent *qke)
{
    if (qke->key() == Qt::Key_Return) {
        emit (passInputReturnPressed());
    }
}


void InitalPrompt::on_passInput_returnPressed()
{
    pass = ui->passInput->text();
    this->hide();

    //ui->passInput->setText("it actually does work property messed it up");
}

void InitalPrompt::reject()
{

    QMessageBox::StandardButton resBtn = QMessageBox::Yes;
    bool changes = false;
    if (changes) {
        resBtn = QMessageBox::question( this, "APP_NAME",
                                        tr("Are you sure?\n"),
                                        QMessageBox::Cancel | QMessageBox::No | QMessageBox::Yes,
                                        QMessageBox::Yes);
    }
    if (resBtn == QMessageBox::Yes) {
        QDialog::reject();

    }
    // the only issue is with the statment below don't know why
    copy->close();
}
 void InitalPrompt::catcher(MainWindow *ui)
{
    copy = ui;
}

initialprompt.h

#ifndef INITALPROMPT_H
#define INITALPROMPT_H
#include "mainwindow.h"
#include <QDialog>
#include <QKeyEvent>

namespace Ui {
class InitalPrompt;
class MainWindow;
}

class InitalPrompt : public QDialog
{
    Q_OBJECT

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

    void catcher(MainWindow *ui);
    QString pass;

    void keyPressEvent(QKeyEvent *qke);

private slots:

public slots:
    virtual void reject();
    void on_passInput_returnPressed();
signals:
    void clickme();
    void passInputReturnPressed();
private:
    Ui::InitalPrompt *ui;
    MainWindow *copy;
};

#endif // INITALPROMPT_H

main.cpp

#include "mainwindow.h"
#include "initalprompt.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    InitalPrompt i;

    //w.show();
    i.catcher(&w);
    i.setModal(true);
    //QObject::connect(&i, i.reject(), &w, w.close());
    QObject::connect(&i, SIGNAL(clickme()), &i, SLOT(reject()));
    QObject::connect(&i, SIGNAL(passInputReturnPressed()), &i, SLOT(on_passInput_returnPressed()));
    QObject::connect(&i, SIGNAL(passInputReturnPressed()), &w, SLOT(initalizer()));
    i.exec();
    // get the statement above to work and you should be golden
    //QObject::connect(&i, SIGNAL(clicked()), &w, SLOT(close()));
    return a.exec();
}

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();
    //static int num;
private slots:
    void initalizer();
    void on_Defrag_clicked();

    void on_clean_reg_clicked();

    void on_junk_files_clicked();

public:
    Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H