Reimplement Qt method

def mousePressEvent(self, event):
        """Reimplement Qt method"""
        if sys.platform.startswith('linux') and event.button() == Qt.MidButton:
            self.calltip_widget.hide()
            self.setFocus()
            event = QMouseEvent(QEvent.MouseButtonPress, event.pos(),
                                Qt.LeftButton, Qt.LeftButton, Qt.NoModifier)
            QPlainTextEdit.mousePressEvent(self, event)
            QPlainTextEdit.mouseReleaseEvent(self, event)
            # Send selection text to clipboard to be able to use
            # the paste method and avoid the strange Issue 1445
            # NOTE: This issue seems a focusing problem but it
            # seems really hard to track
            mode_clip = QClipboard.Clipboard
            mode_sel = QClipboard.Selection
            text_clip = QApplication.clipboard().text(mode=mode_clip)
            text_sel = QApplication.clipboard().text(mode=mode_sel)
            QApplication.clipboard().setText(text_sel, mode=mode_clip)
            self.paste()
            QApplication.clipboard().setText(text_clip, mode=mode_clip)
        else:
            self.calltip_widget.hide()
            QPlainTextEdit.mousePressEvent(self, event)