title: drag a file into QtGui.QLineEdit() to set url text
body: <p>I've made a <code>QtGui.LineEdit()</code> widget in a python script using pySide Qt bindings and I'd like to be able to drag a file from the desktop into the QLineEdit to set the text in the QLineEdit to the path of the file. I've done <code>QLineEdit.setDragEnabled(True)</code> to enable drag and drop operations but I'm a bot lost about how to procede from here. Does anyone know how to achieve this?</p>