MDI application memory issue

[sirQit]

Hi all

I am trying to make an MDI application, I am able to add MDI child windows to my main window, the problem is that every time I create a new MDI child some memory is allocated and this memory is not freed after I close the MDI child.

This is what I have done

Created a new app, added a new QMdiArea object to the QMainWindow through the designer, then whenever I need to create a new MDI child, I call this:

void MainWindow::on_addMdiChildAction_triggered()
{
	MdiDialog* dialog = new MdiDialog(this);
	this->ui->mdiArea->addSubWindow(dialog);
	dialog->show();
}

void MainWindow::on_addMdiChildAction_triggered()
{
	MdiDialog* dialog = new MdiDialog(this);
	this->ui->mdiArea->addSubWindow(dialog);
	dialog->show();
}

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Am I missing anything?

Thanks in advance.