One popup menu added to few tool buttons

[atomic]

Hi,

In my application i have some tool buttons which have the same popup menu which include actions - open, copy, and remove.

QMenu menu;
 
QAction * open = new QAction( "Open", &menu );
open->setShortcuts( QKeySequence::Open );
 
//... other actions
 
menu.addAction( open );
menu.addAction( copy );
menu.addAction( remove );
 
ui->left->setPopupMode( QToolButton::DelayedPopup );
ui->left->setMenu( &menu );
 
ui->mid->setPopupMode( QToolButton::DelayedPopup );
ui->mid->setMenu( &menu );
 
ui->right->setPopupMode( QToolButton::DelayedPopup );
ui->right->setMenu( &menu );
 
// connects
 
connect( open, SIGNAL(triggered()), this, SLOT(open()) );

QMenu menu;

QAction * open = new QAction( "Open", &menu );
open->setShortcuts( QKeySequence::Open );

//... other actions

menu.addAction( open );
menu.addAction( copy );
menu.addAction( remove );

ui->left->setPopupMode( QToolButton::DelayedPopup );
ui->left->setMenu( &menu );

ui->mid->setPopupMode( QToolButton::DelayedPopup );
ui->mid->setMenu( &menu );

ui->right->setPopupMode( QToolButton::DelayedPopup );
ui->right->setMenu( &menu );

// connects

connect( open, SIGNAL(triggered()), this, SLOT(open()) );

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Now if user select some action in menu on some button I don't know how I can detect which of buttons relates this action.

How I can do this?
Thanks,