Allow files to be dropped on the Qt console widget.

The filename will be wrapped in single quotation marks and inserted in
the location of the text cursor before the drag was initiated.  (This
behavior is somewhat different than the drag and drop of text).

Multiple files will have their names joined with a space.

IPython/frontend/qt/console/console_widget.py

@@ -351,14 +351,21 b' class ConsoleWidget(LoggingConfigurable, QtGui.QWidget):'
     #---------------------------------------------------------------------------
 
     def dragEnterEvent(self, e):
-        if e.mimeData().hasText():
+        if e.mimeData().hasUrls():
+            # The link action should indicate to that the drop will insert
+            # the file anme.
+            e.setDropAction(QtCore.Qt.LinkAction)
+            e.accept()
+        elif e.mimeData().hasText():
             # By changing the action to copy we don't need to worry about
             # the user accidentally moving text around in the widget.
             e.setDropAction(QtCore.Qt.CopyAction)
             e.accept()
 
     def dragMoveEvent(self, e):
-        if e.mimeData().hasText():
+        if e.mimeData().hasUrls():
+            pass
+        elif e.mimeData().hasText():
             cursor = self._control.cursorForPosition(e.pos())
             if self._in_buffer(cursor.position()):
                 e.setDropAction(QtCore.Qt.CopyAction)
@@ -368,7 +375,14 b' class ConsoleWidget(LoggingConfigurable, QtGui.QWidget):'
             e.accept()
 
     def dropEvent(self, e):
-        if e.mimeData().hasText():
+        if e.mimeData().hasUrls():
+            self._keep_cursor_in_buffer()
+            cursor = self._control.textCursor()
+            filenames = [url.toLocalFile() for url in e.mimeData().urls()]
+            text = ', '.join("'" + f.replace("'", "'\"'\"'") + "'"
+                             for f in filenames)
+            self._insert_plain_text_into_buffer(cursor, text)
+        elif e.mimeData().hasText():
             cursor = self._control.cursorForPosition(e.pos())
             if self._in_buffer(cursor.position()):
                 text = e.mimeData().text()