Signal & Slot

[LordQt]

Hello friends,

i´am nearly ready with my treeview. To expand the child i must double click on the parent.
But i want expand it by one click so i implement this

privat slots:
void expand(const QModelIndex & index);

privat slots:
void expand(const QModelIndex & index);

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in my mainwindow i add this code:

connect(qtv, SIGNAL(clicked(  const QModelIndex & index )), 
    		this, SLOT(expand(const QModelIndex & index)));

connect(qtv, SIGNAL(clicked(  const QModelIndex & index )), 
    		this, SLOT(expand(const QModelIndex & index)));

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and after all the implementation:

void MainWindow::expand(const QModelIndex & index)
{
	if ( index.isValid())
	{
	qtv->expand(index);
	}
 
}

void MainWindow::expand(const QModelIndex & index)
{
	if ( index.isValid())
	{
	qtv->expand(index);
	}

}

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But nothing happens. I must always doubleclick the parent item to expand the child.

Have anybody an idea what i make wrong??