Multiple calls which create multiple instances of QSignalMapper

The Open() function will be initiate a number of times based on user's preference.
I learned that QSignalMapper will be clear by it's parent upon the destruction of application.
But what would happened in this case?

Below are the code snippet:

Code:

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void class1::Open()
{
	// opened a folder & and extract a list of directories ...
 
	QSignalMapper *signalMapper = new QSignalMapper(this);
	for(int i = 0; i < directoryList.size(); i++)
	{
		std::cout << directoryList[i].toStdString() << std::endl;
 
		DirWidget *dirWidgetPtr = new DirWidget(directoryList[i]);
		signalMapper->setMapping(dirWidgetPtr->_buttonPtr, directoryList[i]);
		connect(dirWidgetPtr->_buttonPtr, SIGNAL(clicked()), signalMapper, SLOT(map()));
		_flowLayoutPtr->addWidget(dirWidgetPtr);
 
	}
    connect(signalMapper, SIGNAL(mapped(QString)), this, SLOT(GetDir(QString)));
}

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Quote:

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But what would happened in this case?

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What would happen to what? The QSignalMapper(s) you create will be destroyed when their parent instance of class1 is destroyed. The DirWidgets will be destroyed when their _flowLayout is destroyed (assuming it is a well behaved QLayout derivative).

Thanks for the reply ChrisW67.

To be specific:
So is that means class1 keeps all the created QSignalMapper instances until it destroyed?
Or it destroy the previous one right after I initiate a new QSignalMapper?