Segmentation fault in QListViewItem

[ederbs]

Hi friends,

I am using the QListView to list given of the data base. The clic problem is when I in the white part of the screen where an item does not exist, of the error:

"Segmentation fault (core dumped)"

and the closed application and.

QSqlQuery queryViatura( QUERY_LISTVIATURES ); /* Query Sql */

lstViewViaturaDisponivel->clear();
while(queryViatura.next())
{
lstViewViaturaDisponivel->setColumnWidthMode( 0, QListView::Maximum );
lstViewViaturaDisponivel->adjustColumn( 0 );
lstViewViaturaDisponivel->setColumnWidth( 0, 140 );
lstViewViaturaDisponivel->setColumnWidth( 1, 300 );
lstViewViaturaDisponivel->setColumnWidth( 2, 200 );
lstViewViaturaDisponivel->insertItem( new QListViewItem( lstViewViaturaDisponivel,
queryViatura.value( 0 ).toString(),
queryViatura.value( 1 ).toString(),
queryViatura.value( 2 ).toString()
));
}

QObject::connect(lstViewViaturaDisponivel, SIGNAL( clicked( QListViewItem * ) ), this, SLOT( selectViewItemViaturasEmpenha( QListViewItem *) ) );

void ViaturaDisponivelForm::selectViewItemViaturasEmpen ha( QListViewItem *item )
{
globalVtrEmpenha = item->text(0);

cout << "E-193 ==> ListViewViaturaEmpenha item selecionado " << globalVtrEmpenha << endl;

}

[jacek]

void QListView::clicked ( QListViewItem * item ) [signal]
This signal is emitted whenever the user clicks (mouse pressed and mouse released) in the list view. item is the clicked list view item, or 0 if the user didn't click on an item.
Check whther item isn't null before you use it.

[ederbs]

Yes, now it is working,

void ViaturaDisponivelForm::selectViewItemViaturasEmpen ha( QListViewItem *item )
{

if(!item)
{
globalVtrEmpenha = QString::null;
} else {

globalVtrEmpenha = item->text(0);

} }