problem in widget inheritance

[wagmare]

i created one object "main" with stackedwidget where there is four pages and in four pages i create three "panel" classes

MainWindow ::MainWindow(QDialog *parent)
{
          Panel *panel = new Panel();
}

MainWindow ::MainWindow(QDialog *parent)
{
          Panel *panel = new Panel();
}

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now in panel.cpp a Qpushbutton "control" ... if i click the pushbutton of panel class can i change the page of the main class stackedWidget
i am having less C++ knowledge
please help