def __init__(self):
# Init parent class for resizing etc...
QMainWindow.__init__(self)
# History Client
self.client = HistoryClient()
#self.requests = {}
self.readResponseSubscriptions = []
self.setWindowTitle('History Client')
# Create Tab widget and fill with
# pages
self._build_tab_widget()
page = self._build_requests_page()
self.tabWidget.addTab(page, 'Requests')
page = self._build_read_requests_page()
self.tabWidget.addTab(page, 'Read')
page = self._build_read_requests_page()
self.tabWidget.addTab(page, 'DataBases')
self.fetchRequests()
def main():
client = HistoryClient()
print '-- Car history simulator --'
# Make a history request for data we're gonna insert
sparql = """
SELECT ?person ?car ?km ?tire ?tireTread WHERE {
?person <http://rdf.tesladocet.com/ns/person-car.owl#HasCar> ?car .
?car <http://rdf.tesladocet.com/ns/person-car.owl#HasKm> ?km .
?car <http://rdf.tesladocet.com/ns/person-car.owl#HasTire> ?tire .
?tire <http://rdf.tesladocet.com/ns/person-car.owl#HasTireTread> ?tireTread
}"""
req_id = client.addHistoryRequest(sparql)
print req_id
# Start the simulator
tachometer = Tachometer()
tachometer.start()
# Keep it running untill Ctrl-c
global carEngineOn
try:
while True:
time.sleep(10)
except KeyboardInterrupt:
print 'Shutting off the engine...'
carEngineOn = False
# Retrieve back historical data
client.readHistoryRequestData(req_id, ReadResponseHandler())
# Close all the subscriptions of the client, otherwise it hangs
client.quit()
sys.exit()
class MainWindow(QMainWindow):
def __init__(self):
# Init parent class for resizing etc...
QMainWindow.__init__(self)
# History Client
self.client = HistoryClient()
#self.requests = {}
self.readResponseSubscriptions = []
self.setWindowTitle('History Client')
# Create Tab widget and fill with
# pages
self._build_tab_widget()
page = self._build_requests_page()
self.tabWidget.addTab(page, 'Requests')
page = self._build_read_requests_page()
self.tabWidget.addTab(page, 'Read')
page = self._build_read_requests_page()
self.tabWidget.addTab(page, 'DataBases')
self.fetchRequests()
def _build_tab_widget(self):
self.tabWidget = QTabWidget()
self.setCentralWidget(self.tabWidget)
def _build_requests_page(self):
addRequestBox = QHBoxLayout()
self.lineEdit = QLineEdit("")
addRequestBox.addWidget(self.lineEdit)
self.addbutton = QPushButton("Add Request")
self.addbutton.clicked.connect(self.addRequest)
addRequestBox.addWidget(self.addbutton)
requestsBox = QHBoxLayout()
requestActionsBox = QVBoxLayout()
self.listWidget = QListWidget()
self.listWidget.itemClicked.connect(self._enableDeleteButton)
self.listWidget.itemClicked.connect(self._enableReadButton)
self.listWidget.doubleClicked.connect(self._showInfoDialog)
requestsBox.addWidget(self.listWidget)
self.readButton = QPushButton("Read Request")
self.readButton.setEnabled(False)
self.readButton.clicked.connect(self.readRequest)
requestActionsBox.addWidget(self.readButton)
self.deleteButton = QPushButton("Delete Request")
self.deleteButton.setEnabled(False)
self.deleteButton.clicked.connect(self.deleteRequest)
requestActionsBox.addWidget(self.deleteButton)
requestsBox.addLayout(requestActionsBox)
layout = QVBoxLayout()
layout.addLayout(addRequestBox)
layout.addLayout(requestsBox)
page = QWidget()
page.setLayout(layout)
return page
def _build_read_requests_page(self):
layout = QVBoxLayout()
page = QWidget()
page.setLayout(layout)
return page
def _build_dbs_page(self):
layout = QVBoxLayout()
page = QWidget()
page.setLayout(layout)
return page
def _enableDeleteButton(self):
self.deleteButton.setEnabled(True)
def _enableReadButton(self):
self.readButton.setEnabled(True)
def _showInfoDialog(self):
text = QLabel('ciao')
vbox = QVBoxLayout()
vbox.addWidget(text)
dialog = QDialog(self)
dialog.setLayout(vbox)
dialog.show()
def fetchRequests(self):
requests = self.client.showHistoryRequests()
for r in requests:
lvi = QListWidgetItem(r['sparql'], self.listWidget)
lvi.setData(Qt.UserRole, QVariant(r['uri']))
def addRequest(self):
sparql = self.lineEdit.text()
request_uri = self.client.addHistoryRequest(sparql)
lvi = QListWidgetItem(sparql, self.listWidget)
lvi.setData(Qt.UserRole, QVariant(request_uri))
print request_uri
def readRequest(self):
# Issue a history read on the currently selected item
item = self.listWidget.item(self.listWidget.currentRow())
request_uri = item.data(Qt.UserRole).toPyObject()
# History read. Automatically fetch sparql from the request
self.client.readHistoryRequestData(request_uri, HistoryReadResponseHandler())
# Disable others requests untill dont receive a response!
self.readButton.setEnabled(False)
def deleteRequest(self):
# Remove the currently selected item from the listview.
item = self.listWidget.takeItem(self.listWidget.currentRow())
request_uri = item.data(Qt.UserRole).toPyObject()
self.client.deleteHistoryRequest(request_uri)
# Check if the list is empty - if yes, disable the deletebutton.
if self.listWidget.count() == 0:
self.deleteButton.setEnabled(False)
def closeEvent(self, *args, **kwargs):
self.client.quit()
