def keyPressEvent(self, event):
        if event.key() == Qt.Key_Escape:
            self.reset_view()

        if event.key() == Qt.Key_F1:
            self.set_alias_visibility(not self.aliases_visible)

        if event.key() == Qt.Key_F2:
            self.set_port_visibility(not self.ports_visible)

        if event.key() == Qt.Key_F3:
            self.set_subport_visibility(not self.subports_visible)


        if event.key() == Qt.Key_Question:
            help_str = """
            Mouse control:
              Mousewheel: Zoom in and out
              Right-click & drag: Zoom to rectangle
              Middle-click & drag: Pan

            Keyboard shortcuts:
              Esc: Reset view
              F1: Show/hide alias names
              F2: Show/hide ports
              F3: Show/hide subports (ports in underlying references)
            """
            QMessageBox.about(self, 'PHIDL Help', help_str) 

def keyPressEvent(self, event):
        if event.key() == Qt.Key_F3:
            if not self._findItems:
                QMessageBox.warning(self, '警告', '没有找到要查找的内容!')
                return

            self._curFindItemPos += 1
            self._curFindItemPos = self._curFindItemPos%len(self._findItems)

            self.scrollToItem(self._findItems[self._curFindItemPos])
            self.setCurrentItem(self._findItems[self._curFindItemPos]) 

def keyPressEvent(self, event):
        if event.key() == Qt.Key_F3:
            if not self._findItems:
                QMessageBox.warning(self, '警告', '没有找到要查找的内容!')
                return

            self._curFindItemPos += 1
            self._curFindItemPos = self._curFindItemPos%len(self._findItems)

            self.scrollToItem(self._findItems[self._curFindItemPos])
            self.setCurrentItem(self._findItems[self._curFindItemPos]) 

def keyPressEvent(self, e):
        if e.modifiers() == Qt.ControlModifier and e.key() == Qt.Key_F:
            text, okPressed = QInputDialog.getText(self, "Find", "Find what: ")

            self.setSelectionBackgroundColor(QColor("#6be585"))

            if okPressed:
                if text == "":
                    text = " "
                    self.dialog.noMatch(text)

                self.searchtext = text

                """
                This is the way to implement a search function using QScintilla 
                http://pyqt.sourceforge.net/Docs/QScintilla2/classQsciScintilla.html#a37ac2bea94eafcfa639173557a821200
                """

                if self.findFirst(
                    self.searchtext, False, True, False, True, True, -1, -1, True, False
                ):
                    pass
                else:
                    self.dialog.noMatch(self.searchtext)

        if e.key() == Qt.Key_F3:
            self.findNext()
            self.setSelectionBackgroundColor(QColor("#6be585"))

        if e.modifiers() == Qt.ControlModifier and e.key() == Qt.Key_L:
            self.setCursorPosition(self.line, self.column + 1)
            return
        if e.modifiers() == Qt.ControlModifier and e.key() == 77:

            self.setCursorPosition(self.line + 1, self.column)
            return
        if e.modifiers() == Qt.ControlModifier and e.key() == Qt.Key_J:
            self.setCursorPosition(self.line, self.column - 1)

        if e.modifiers() == Qt.ControlModifier and e.key() == Qt.Key_I:
            self.setCursorPosition(self.line - 1, self.column)

        if e.modifiers() == Qt.ControlModifier and e.key() == Qt.Key_T:
            self.parent.parent.realterminal()
            return

        super().keyPressEvent(e)