statusbar problem

hi,
i have QGLwidget inside the mainwindow. for mouseMoveEvent( )in GLwidget i would like to dispaly my object coordinates in statusbar of Mainwindow().
but inside mouseMoveEvent() of QGLwidget() we can't access statusbar() of mainwindow. so inside mouseMoveEvent() i call one function which is declared in class which is derived from mainwindow.this function is successfully receving values correctly. but it not showing .
could anyone help me what is the reason. here i am sending snap shot

Code:

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GLWidget:public QGLidget;
window:public QMainwindow()

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Code:

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void GLWidget::mouseMoveEvent(QMouseEvent *event)
{
      ------------
       ------------
	longitude=wx;
	latitude=wy;
		window->Display(longitude,latitude);
 
 
}

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Code:

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bool Window::Display(double a,double b)
{
	double longitude=a;
	double latitude=b;
	QString str1 = QString("Lon: %1  , ").arg(longitude, 0, 'E', 3);
 
 
	QString str2 = QString(" Lat: %1").arg(latitude, 0, 'E', 3);
	QString str=str1+str2;
	statusBar()->setLayoutDirection(Qt::RightToLeft);
	statusBar()->showMessage(str);
 
	//QMessageBox::information(this, "Test",str);      
 
	return true;
 
}

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I think you should use signals and slots instead of such a construct. Simply emit a signal with coordinates to show in mousePressEvent and connect to that signal with a slot in your main window where you have access to the status bar.

hi,
even though i used signal and slot mechanism,its't not working.
i put breakpoint at emit dispaly(longitude,latitude). but it is not connecting to the slot