Simple Mdi question

[slqh]

Hello.
I have a MDI area with a menu.
that i created like this.

setupUi(this);
     mdiArea = new QMdiArea;
     mdiArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAsNeeded);
     mdiArea->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
     setCentralWidget(mdiArea);
 
     setWindowTitle(tr("MDI"));
     setUnifiedTitleAndToolBarOnMac(true);

setupUi(this);
     mdiArea = new QMdiArea;
     mdiArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAsNeeded);
     mdiArea->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
     setCentralWidget(mdiArea);

     setWindowTitle(tr("MDI"));
     setUnifiedTitleAndToolBarOnMac(true);

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When one of hte options is clicked i create a window like this.

frmUserProfile *b = new frmUserProfile;
  mdiArea->addSubWindow(b);
  b->exec();

frmUserProfile *b = new frmUserProfile;
  mdiArea->addSubWindow(b);
  b->exec();

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Then from that window i want to open a second one when the user clicks on a button.
the problem is that mdiArea does not exist there and if i do

frmTest *t = new frmTest(this);
  t->exec();
  delete t;

frmTest *t = new frmTest(this);
  t->exec();
  delete t;

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The window is shown outside of the mdi area.

One workaround i found is to use a signal to make the mainwindow open frmTest, but it looks like a ugly thing to do and I'm sure other problems will arise from that method.

How can i fix the problem of Qdialogs appearing outside the MDIarea?
I realize that maybe this is more of a c++ problem than a Qt one, sorry for that.

Thanks!