Disable Close button (X) of a QDialog

[shad]

It was suggested that we can inherit a QDialog box and disable it there...would anyone else know of any other suggestions?

try upgrading to qt 4.5

[lni]

Try this

#include <qapplication.h>
#include <qevent.h>
#include <qpushbutton.h>
#include <qdialog.h>
#include <qmessagebox.h>
#include <iostream>
 
class MyDialog : public QDialog
{
public:
 
  MyDialog( QWidget* parent=0 ) : QDialog( parent ) {
  }
 
protected:
 
  void closeEvent ( QCloseEvent * event ) {
    event->ignore();
    QMessageBox::information( this, "Close?", "Close? No way!" );
  }
};
 
int main( int argc, char** argv )
{
  QApplication app( argc, argv );
 
  MyDialog dlg;
  QPushButton* button = new QPushButton( "Exit", &dlg );
  QObject::connect( button, SIGNAL( clicked() ),
                    &app, SLOT( quit() ) );
  dlg.resize( 300, 300 );
  dlg.show();
 
  return app.exec();
 
}

#include <qapplication.h>
#include <qevent.h>
#include <qpushbutton.h>
#include <qdialog.h>
#include <qmessagebox.h>
#include <iostream>

class MyDialog : public QDialog
{
public:

  MyDialog( QWidget* parent=0 ) : QDialog( parent ) {
  }

protected:

  void closeEvent ( QCloseEvent * event ) {
    event->ignore();
    QMessageBox::information( this, "Close?", "Close? No way!" );
  }
};

int main( int argc, char** argv )
{
  QApplication app( argc, argv );

  MyDialog dlg;
  QPushButton* button = new QPushButton( "Exit", &dlg );
  QObject::connect( button, SIGNAL( clicked() ),
                    &app, SLOT( quit() ) );
  dlg.resize( 300, 300 );
  dlg.show();

  return app.exec();

}

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[kyue]

Try this

#include <qapplication.h>
#include <qevent.h>
#include <qpushbutton.h>
#include <qdialog.h>
#include <qmessagebox.h>
#include <iostream>
 
class MyDialog : public QDialog
{
public:
 
  MyDialog( QWidget* parent=0 ) : QDialog( parent ) {
  }
 
protected:
 
  void closeEvent ( QCloseEvent * event ) {
    event->ignore();
    QMessageBox::information( this, "Close?", "Close? No way!" );
  }
};
 
int main( int argc, char** argv )
{
  QApplication app( argc, argv );
 
  MyDialog dlg;
  QPushButton* button = new QPushButton( "Exit", &dlg );
  QObject::connect( button, SIGNAL( clicked() ),
                    &app, SLOT( quit() ) );
  dlg.resize( 300, 300 );
  dlg.show();
 
  return app.exec();
 
}

#include <qapplication.h>
#include <qevent.h>
#include <qpushbutton.h>
#include <qdialog.h>
#include <qmessagebox.h>
#include <iostream>

class MyDialog : public QDialog
{
public:

  MyDialog( QWidget* parent=0 ) : QDialog( parent ) {
  }

protected:

  void closeEvent ( QCloseEvent * event ) {
    event->ignore();
    QMessageBox::information( this, "Close?", "Close? No way!" );
  }
};

int main( int argc, char** argv )
{
  QApplication app( argc, argv );

  MyDialog dlg;
  QPushButton* button = new QPushButton( "Exit", &dlg );
  QObject::connect( button, SIGNAL( clicked() ),
                    &app, SLOT( quit() ) );
  dlg.resize( 300, 300 );
  dlg.show();

  return app.exec();

}

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Thank you for your reply. Yes, this was a solution that was considered. I'm wondering if there is another solution where we don't have to inherit and ignore the closeEvent...

[kyue]

If this helps anyone, you can remove the three buttons on the top left (close, minimize, maximize) on a Mac and leaving the title there using:

setWindowModality(Qt::WindowModal);

setWindowModality(Qt::WindowModal);

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[rajesh]

try Window flags
see the example: http://doc.trolltech.com/4.3/widgets-windowflags.html

[totem]

hi

this did the job for me (on a QDialog based class) :

Qt::WindowFlags flags = windowFlags() ;
flags |= Qt::CustomizeWindowHint ;
flags &= ~Qt::WindowCloseButtonHint ;
setWindowFlags( flags ) ;

Qt::WindowFlags flags = windowFlags() ;
flags |= Qt::CustomizeWindowHint ;
flags &= ~Qt::WindowCloseButtonHint ;
setWindowFlags( flags ) ;

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[kyue]

try upgrading to qt 4.5

Sorry, I didn't see these replies until now. It's not an option for us right now.