problems with layout - (stretch)

[pakine]

Hi to all, i have one problem with a QVBoxLayout.
at first a list of messages are loaded into a QScrollArea. Those panels(messages) have a button to display its parameters in other panels below the message panel.
The problem is that when i try to insert the parameters penls below the message panel, they are displayed with space between them, and i dont know hot to display them together with no space.

here is the code to load the messages.It works well.

QWidget *scrollWidget = ui.scrollTx;
	QVBoxLayout *layout = (QVBoxLayout*) scrollWidget->layout ();
 
 
		//Creo los nuevos paneles y los añado a la lista.
		for (it = m_cListaTx.begin (); it != m_cListaTx.end ();)
		{
			CArincMsgData *msg = *it;
			if (msg)
			{
				PanelTx *panel = new PanelTx (msg, *this, layout->widget());
				layout->addWidget (panel);
			}
			it++;
		}
		((QVBoxLayout *)layout)->addStretch ();

QWidget *scrollWidget = ui.scrollTx;
	QVBoxLayout *layout = (QVBoxLayout*) scrollWidget->layout ();

	
		//Creo los nuevos paneles y los añado a la lista.
		for (it = m_cListaTx.begin (); it != m_cListaTx.end ();)
		{
			CArincMsgData *msg = *it;
			if (msg)
			{
				PanelTx *panel = new PanelTx (msg, *this, layout->widget());
				layout->addWidget (panel);
			}
			it++;
		}
		((QVBoxLayout *)layout)->addStretch ();

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when i addStretch, all the panels are displayed together with no space between them..



and here is the code i have problems with

QWidget *scrollWidget = ui.scrollTx;
	QVBoxLayout *layout = (QVBoxLayout *)scrollWidget->layout ();
 
	int i;
	for (i = 0, it = m_cListaTx.begin(); it != m_cListaTx.end (); it++, i++)
	{
		//localizo el panel
		msg = *it;
		panel = m_cListaPanelsTx[msg->getLabel()];
		if( label == atoi(msg->getStrLabel().c_str ()) )
		{
                //when i locate the message i create as many parameter panel as it has
 
                        params = msg->getParametros ();
			for(int j = 0; j < params.size(); j++)
			{
				OutputDebugStringA ("voy a insertar un panel\n");
 
                                //create a panel
				PanelTxParams *panelParametro = new PanelTxParams (layout->widget(),params[j],msg->getStrLabel ());
 
				layout->insertWidget(++i,panelParametro);								
			}
           ......

QWidget *scrollWidget = ui.scrollTx;
	QVBoxLayout *layout = (QVBoxLayout *)scrollWidget->layout ();
	
	int i;
	for (i = 0, it = m_cListaTx.begin(); it != m_cListaTx.end (); it++, i++)
	{
		//localizo el panel
		msg = *it;
		panel = m_cListaPanelsTx[msg->getLabel()];
		if( label == atoi(msg->getStrLabel().c_str ()) )
		{
                //when i locate the message i create as many parameter panel as it has
			
                        params = msg->getParametros ();
			for(int j = 0; j < params.size(); j++)
			{
				OutputDebugStringA ("voy a insertar un panel\n");
				
                                //create a panel
				PanelTxParams *panelParametro = new PanelTxParams (layout->widget(),params[j],msg->getStrLabel ());

				layout->insertWidget(++i,panelParametro);								
			}
           ......

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in this part im not using addstretch() cause i have used at messages loading. But if i use it the result is not the desirable.

when i insert the parameters panels they are not displayed together, but they are displayed with some lines of space between them.

other thing is that in other function i have to insert the same message panels and it works fine, but with those new panels (parameter panels) the result is different.

how can i get this working fine?

thanks a lot