def send_ctrl_to_process(self, letter):
     char = chr("abcdefghijklmnopqrstuvwxyz".index(letter) + 1)
     byte_array = QByteArray()
     byte_array.append(char)
     self.process.write(byte_array)
     self.process.waitForBytesWritten(-1)
     self.shell.write(LOCALE_CODEC.toUnicode(byte_array), flush=True)

 def mouseMoveEvent(self, event):
     """Override Qt method"""
     if event.buttons() == Qt.MouseButtons(Qt.LeftButton) and \
        (event.pos() - self.__drag_start_pos).manhattanLength() > \
             QApplication.startDragDistance():
         drag = QDrag(self)
         mimeData = QMimeData()
         # Converting id's to long to avoid an OverflowError with PySide
         if PY2:
             ancestor_id = long(id(self.ancestor))
             parent_widget_id = long(id(self.parentWidget()))
             self_id = long(id(self))
         else:
             ancestor_id = id(self.ancestor)
             parent_widget_id = id(self.parentWidget())
             self_id = id(self)
         mimeData.setData("parent-id", QByteArray.number(ancestor_id))
         mimeData.setData("tabwidget-id",
                          QByteArray.number(parent_widget_id))
         mimeData.setData("tabbar-id", QByteArray.number(self_id))
         mimeData.setData("source-index", 
                      QByteArray.number(self.tabAt(self.__drag_start_pos)))
         drag.setMimeData(mimeData)
         drag.exec_()
     QTabBar.mouseMoveEvent(self, event)

 def read_output(self, error=False):
     if error:
         self.process.setReadChannel(QProcess.StandardError)
     else:
         self.process.setReadChannel(QProcess.StandardOutput)
     qba = QByteArray()
     while self.process.bytesAvailable():
         if error:
             qba += self.process.readAllStandardError()
         else:
             qba += self.process.readAllStandardOutput()
     text = to_text_string( locale_codec.toUnicode(qba.data()) )
     if error:
         self.error_output += text
     else:
         self.output += text

 def mouseMoveEvent(self, event):
     """Override Qt method"""
     if event.buttons() == Qt.MouseButtons(Qt.LeftButton) and \
        (event.pos() - self.__drag_start_pos).manhattanLength() > \
             QApplication.startDragDistance():
         drag = QDrag(self)
         mimeData = QMimeData()
         mimeData.setData("parent-id", QByteArray.number(id(self.ancestor)))
         mimeData.setData("tabwidget-id",
                          QByteArray.number(id(self.parentWidget())))
         mimeData.setData("tabbar-id", QByteArray.number(id(self)))
         mimeData.setData("source-index", 
                      QByteArray.number(self.tabAt(self.__drag_start_pos)))
         drag.setMimeData(mimeData)
         drag.exec_()
     QTabBar.mouseMoveEvent(self, event)