def add_label_from_constructed(self):
label = QLabel(self._constructed)
label.setOpenExternalLinks(True)
label.setWordWrap(True)
label.setFont(self._font)
self._constructed = ''
self._widgets.append(label)
def __init__(self, parent: QWidget = None):
super().__init__(parent)
self.setWindowFlags(self.windowFlags()
& ~Qt.WindowContextHelpButtonHint)
self.server = QLocalServer(self)
if not self.server.listen("fortune"):
QMessageBox.critical(
self,
self.tr("Local Fortune Server"),
self.tr("Unable to start the server: %s." %
(self.server.errorString())),
)
QTimer.singleShot(0, self.close)
return
statusLabel = QLabel()
statusLabel.setWordWrap(True)
statusLabel.setText(
self.
tr("The server is running.\nRun the Local Fortune Client example now."
))
self.fortunes = (
self.tr(
"You've been leading a dog's life. Stay off the furniture."),
self.tr("You've got to think about tomorrow."),
self.tr("You will be surprised by a loud noise."),
self.tr("You will feel hungry again in another hour."),
self.tr("You might have mail."),
self.tr("You cannot kill time without injuring eternity."),
self.tr(
"Computers are not intelligent. They only think they are."),
)
quitButton = QPushButton(self.tr("Quit"))
quitButton.setAutoDefault(False)
quitButton.clicked.connect(self.close)
self.server.newConnection.connect(self.sendFortune)
buttonLayout = QHBoxLayout()
buttonLayout.addStretch(1)
buttonLayout.addWidget(quitButton)
buttonLayout.addStretch(1)
mainLayout = QVBoxLayout(self)
mainLayout.addWidget(statusLabel)
mainLayout.addLayout(buttonLayout)
self.setWindowTitle(QGuiApplication.applicationDisplayName())
class Client(QDialog):
def __init__(self, parent: QWidget = None):
super().__init__(parent)
self._in = QDataStream()
self.blockSize = 0
self.currentFortune = ""
self.hostLineEdit = QLineEdit("fortune")
self.getFortuneButton = QPushButton(self.tr("Get Fortune"))
self.statusLabel = QLabel(
self.tr(
"This examples requires that you run the Local Fortune Server example as well."
)
)
self.socket = QLocalSocket()
self.setWindowFlags(self.windowFlags() & ~Qt.WindowContextHelpButtonHint)
hostLabel = QLabel(self.tr("&Server name:"))
hostLabel.setBuddy(self.hostLineEdit)
self.statusLabel.setWordWrap(True)
self.getFortuneButton.setDefault(True)
quitButton = QPushButton(self.tr("Quit"))
buttonBox = QDialogButtonBox()
buttonBox.addButton(self.getFortuneButton, QDialogButtonBox.ActionRole)
buttonBox.addButton(quitButton, QDialogButtonBox.RejectRole)
self._in.setDevice(self.socket)
self._in.setVersion(QDataStream.Qt_5_10)
self.hostLineEdit.textChanged.connect(self.enableGetFortuneButton)
self.getFortuneButton.clicked.connect(self.requestNewFortune)
quitButton.clicked.connect(self.close)
self.socket.readyRead.connect(self.readFortune)
self.socket.errorOccurred.connect(self.displayError)
mainLayout = QGridLayout(self)
mainLayout.addWidget(hostLabel, 0, 0)
mainLayout.addWidget(self.hostLineEdit, 0, 1)
mainLayout.addWidget(self.statusLabel, 2, 0, 1, 2)
mainLayout.addWidget(buttonBox, 3, 0, 1, 2)
self.setWindowTitle(QGuiApplication.applicationDisplayName())
self.hostLineEdit.setFocus()
@Slot()
def requestNewFortune(self):
self.getFortuneButton.setEnabled(False)
self.blockSize = 0
self.socket.abort()
self.socket.connectToServer(self.hostLineEdit.text())
@Slot()
def readFortune(self):
if self.blockSize == 0:
# Relies on the fact that QDataStream serializes a quint32 into
# sizeof(quint32) bytes
if self.socket.bytesAvailable() < 4: # (int)sizeof(quint32))
return
self.blockSize = self._in.readUInt32()
if self.socket.bytesAvailable() < self.blockSize or self._in.atEnd():
return
nextFortune = ""
nextFortune = self._in.readQString()
if nextFortune == self.currentFortune:
QTimer.singleShot(0, self.requestNewFortune)
return
currentFortune = nextFortune
self.statusLabel.setText(currentFortune)
self.getFortuneButton.setEnabled(True)
@Slot(QLocalSocket.LocalSocketError)
def displayError(self, socketError):
if socketError == QLocalSocket.ServerNotFoundError:
QMessageBox.information(
self,
self.tr("Local Fortune Client"),
self.tr(
"The host was not found. Please make sure "
"that the server is running and that the "
"server name is correct."
),
)
elif socketError == QLocalSocket.ConnectionRefusedError:
QMessageBox.information(
self,
self.tr("Local Fortune Client"),
self.tr(
"The connection was refused by the peer. "
"Make sure the fortune server is running, "
"and check that the server name is correct."
),
)
elif socketError == QLocalSocket.PeerClosedError:
return
else:
QMessageBox.information(
self,
self.tr("Local Fortune Client"),
self.tr(
"The following error occurred: %s." % (self.socket.errorString())
),
)
self.getFortuneButton.setEnabled(True)
@Slot()
def enableGetFortuneButton(self):
self.getFortuneButton.setEnabled(bool(self.hostLineEdit.ext()))
