send signal from 1 gui to another gui

[tho97]

Hi,

I try to send a signal from my main gui window (when it closes) to another gui ( which start that main window gui). How I can do it?
I got a segment fault when I try this code
main window header:

#include "ui_dirviewdialog.h"
class MainWindow : public QMainWindow, public Ui::MainWindow
{
    Q_OBJECT
 
public:
    MainWindow(QMainWindow *parent = 0);
 
signals:
    void close();
 
protected:
     void closeEvent(QCloseEvent *event);

#include "ui_dirviewdialog.h"
class MainWindow : public QMainWindow, public Ui::MainWindow
{
    Q_OBJECT

public:
    MainWindow(QMainWindow *parent = 0);
    
signals:
    void close();

protected:
     void closeEvent(QCloseEvent *event);

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my main cpp code:

MainWindow::MainWindow(QMainWindow *parent)
    : QMainWindow(parent)
{
    setupUi(this);
}
void MainWindow::closeEvent(QCloseEvent *event ){
emit close();
event->accept();
}

MainWindow::MainWindow(QMainWindow *parent)
    : QMainWindow(parent)
{
    setupUi(this);
}
void MainWindow::closeEvent(QCloseEvent *event ){
emit close();
event->accept();
}

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gui that start that main window:

#include "ui_serverdialog.h"
class MainWindow;
 
class ServerDialog : public QDialog, public Ui::ServerDialog
{
    Q_OBJECT
 
public:
    ServerDialog(QWidget *parent = 0);
 
private slots:
    void gui();
    void stopgui();
 
private:
    MainWindow *mainWindow;
};

#include "ui_serverdialog.h"
class MainWindow;

class ServerDialog : public QDialog, public Ui::ServerDialog
{
    Q_OBJECT

public:
    ServerDialog(QWidget *parent = 0);

private slots:
    void gui();
    void stopgui();
    
private:
    MainWindow *mainWindow;
};

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cpp file:

#include "serverdialog.h"
#include "dirviewdialog.h"
 
 
ServerDialog::ServerDialog(QWidget *parent)
    : QDialog(parent, Qt::WindowMinimizeButtonHint)
{
    QWidget::setWindowFlags(Qt::WindowMinimizeButtonHint);
    setupUi(this);
	stopButton->setEnabled(false);
    stopguiButton->setEnabled(false);
 
    connect(runButton, SIGNAL(clicked()), this, SLOT(gui()));
    connect (mainWindow, SIGNAL(close()), this, SLOT(stopgui()));
}
void ServerDialog::gui()
{
 
    mainWindow = new MainWindow;
    mainWindow->showMaximized();
    mainWindow->activateWindow();
    runButton->setEnabled(false);
    stopguiButton->setEnabled(true);
}
 
void ServerDialog::stopgui()
{
    if(mainWindow != 0){
        delete mainWindow;
    }
    runButton->setEnabled(true);
    stopguiButton->setEnabled(false);
}

#include "serverdialog.h"
#include "dirviewdialog.h"


ServerDialog::ServerDialog(QWidget *parent)
    : QDialog(parent, Qt::WindowMinimizeButtonHint)
{
    QWidget::setWindowFlags(Qt::WindowMinimizeButtonHint);
    setupUi(this);
	stopButton->setEnabled(false);
    stopguiButton->setEnabled(false);

    connect(runButton, SIGNAL(clicked()), this, SLOT(gui()));
    connect (mainWindow, SIGNAL(close()), this, SLOT(stopgui()));
}
void ServerDialog::gui()
{

    mainWindow = new MainWindow;
    mainWindow->showMaximized();
    mainWindow->activateWindow();
    runButton->setEnabled(false);
    stopguiButton->setEnabled(true);
}

void ServerDialog::stopgui()
{
    if(mainWindow != 0){
        delete mainWindow;
    }
    runButton->setEnabled(true);
    stopguiButton->setEnabled(false);
}

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