title: Qt/C++: Signal for when a QListWidgetItem is checked?
body: <p>In my form I have a <code>QListWidget</code> which contains checkable <code>QListWidgetItems</code>. I'm looking for a way to capture the event of a <code>QListWidgetItem</code> being checked/unchecked. I don't see any such signal existing for this but maybe I'm wrong. What I'm currently doing is using the <code>QListWidget::itemClicked()</code> signal and checking the <code>checkState</code> of the <code>QListWidgetItem</code>, but this isn't what I want because this event happens any time the item is clicked, not just went the checkmark is toggled. Can anyone give some assistance? Thanks!</p>