How to make QListView emit a custom SIGNAL and call a custom SLOT to handle it?

Question

How can I make a QListView emit a custom SIGNAL called onListViewItemSelectionChanged whenever its item selection has been changed either by clicking or by using the up and down arrow keys, so that I could assign a custom SLOT called changeLineEditText to handle the SIGNAL?

Answer 1

You can take selectionModel of the list view and connect your slot to its currentChanged signal :

connect(listView->selectionModel(),SIGNAL(​currentChanged(const QModelIndex &,const QModelIndex &)),
        this,SLOT(changeLineEditText(const QModelIndex &,const QModelIndex &)));

Here the first argument is the current selected index and the second one is the previous index.