def __init__(self, id, *argv):
super(QSingleApplication, self).__init__(*argv)
self._id = id
self._activationWindow = None
self._activateOnMessage = False
# Is there another instance running?
self._outSocket = QLocalSocket()
self._outSocket.connectToServer(self._id)
self._isRunning = self._outSocket.waitForConnected()
if self._isRunning:
# Yes, there is.
self._outStream = QTextStream(self._outSocket)
self._outStream.setCodec('UTF-8')
else:
# No, there isn't.
self._outSocket = None
self._outStream = None
self._inSocket = None
self._inStream = None
self._server = QLocalServer()
self._server.listen(self._id)
self._server.newConnection.connect(self._onNewConnection)
def _onNewConnection(self):
if self._inSocket:
self._inSocket.readyRead.disconnect(self._onReadyRead)
self._inSocket = self._server.nextPendingConnection()
if not self._inSocket:
return
self._inStream = QTextStream(self._inSocket)
self._inStream.setCodec('UTF-8')
self._inSocket.readyRead.connect(self._onReadyRead)
if self._activateOnMessage:
self.activateWindow()
def main():
import sys
app = QCoreApplication(sys.argv) # noqa: F841
f = QFile()
f.open(sys.stdout.fileno(), QIODevice.WriteOnly)
out = QTextStream(f)
serialPortInfos = QSerialPortInfo.availablePorts()
out << "Total number of ports available: " << len(serialPortInfos) << "\n"
blankString = "N/A"
description = ""
manufacturer = ""
serialNumber = ""
for serialPortInfo in serialPortInfos:
description = serialPortInfo.description()
manufacturer = serialPortInfo.manufacturer()
serialNumber = serialPortInfo.serialNumber()
out << "\nPort: " << serialPortInfo.portName(
) << "\nLocation: " << serialPortInfo.systemLocation(
) << "\nDescription: " << ( # noqa: E501
description if description else blankString
) << "\nManufacturer: " << (
manufacturer
if manufacturer else blankString) << "\nSerial number: " << (
serialNumber if serialNumber else blankString
) << "\nVendor Identifier: " << (
QByteArray.number(serialPortInfo.vendorIdentifier(), 16)
if serialPortInfo.hasVendorIdentifier() else blankString
) << "\nProduct Identifier: " << (
QByteArray.number(serialPortInfo.productIdentifier(), 16) if
serialPortInfo.hasProductIdentifier() else blankString) << "\n"
def onFileSave(self):
if not self.m_filePath:
self.onFileSaveAs()
return
f = QFile(self.m_filePath)
if not f.open(QIODevice.WriteOnly | QIODevice.Text):
QMessageBox.warning(
self,
self.windowTitle(),
self.tr("Could not write to file %s: %s" %
(QDir.toNativeSeparators(
self.m_filePath), f.errorString())),
)
return
text = QTextStream(f)
text << self.editor.toPlainText()
self.editor.document().setModified(False)
class QSingleApplication(QApplication):
messageReceived = Signal()
def __init__(self, id, *argv):
super(QSingleApplication, self).__init__(*argv)
self._id = id
self._activationWindow = None
self._activateOnMessage = False
# Is there another instance running?
self._outSocket = QLocalSocket()
self._outSocket.connectToServer(self._id)
self._isRunning = self._outSocket.waitForConnected()
if self._isRunning:
# Yes, there is.
self._outStream = QTextStream(self._outSocket)
self._outStream.setCodec('UTF-8')
else:
# No, there isn't.
self._outSocket = None
self._outStream = None
self._inSocket = None
self._inStream = None
self._server = QLocalServer()
self._server.listen(self._id)
self._server.newConnection.connect(self._onNewConnection)
def isRunning(self):
return self._isRunning
def id(self):
return self._id
def activationWindow(self):
return self._activationWindow
def setActivationWindow(self, activationWindow, activateOnMessage=True):
self._activationWindow = activationWindow
self._activateOnMessage = activateOnMessage
def activateWindow(self):
if not self._activationWindow:
return
self._activationWindow.setWindowState((
self._activationWindow.windowState() & ~Qt.WindowMinimized)
| Qt.WindowActive)
SetWindowPos(
self._activationWindow.winId(),
win32con.
HWND_TOPMOST, # = always on top. only reliable way to bring it to the front on windows
0,
0,
0,
0,
win32con.SWP_NOMOVE | win32con.SWP_NOSIZE
| win32con.SWP_SHOWWINDOW)
SetWindowPos(
self._activationWindow.winId(),
win32con.
HWND_NOTOPMOST, # disable the always on top, but leave window at its top position
0,
0,
0,
0,
win32con.SWP_NOMOVE | win32con.SWP_NOSIZE
| win32con.SWP_SHOWWINDOW)
# self._activationWindow.raise_()
self._activationWindow.activateWindow()
def sendMessage(self, msg):
if not self._outStream:
return False
self._outStream << msg << '\n'
self._outStream.flush()
return self._outSocket.waitForBytesWritten()
def _onNewConnection(self):
if self._inSocket:
self._inSocket.readyRead.disconnect(self._onReadyRead)
self._inSocket = self._server.nextPendingConnection()
if not self._inSocket:
return
self._inStream = QTextStream(self._inSocket)
self._inStream.setCodec('UTF-8')
self._inSocket.readyRead.connect(self._onReadyRead)
if self._activateOnMessage:
self.activateWindow()
def _onReadyRead(self):
while True:
msg = self._inStream.readLine()
if not msg: break
self.messageReceived.emit(msg)