def trainingScreen(self):
""" Displays a training screen that displays arrows to different frequency lights
and records the data within each of these periods. Saves this data in a JSON file """
window = drawWidget(self)
# Creates a random ordering of the trials
channels = [str(i) for i in self.settings["channels"].values()
if not i == "None"]
trials = self.settings["numTrials"]
time = self.settings["trialLength"]
bciData = {}
for t in range(trials):
print (t+1), "/", trials
random.shuffle(channels)
bciData[t] = {}
for c in channels:
# Setup
param = self.settings["freqMap"][c]
q = multiQueue()
window.drawCrossTimed(0.4, 3, True)
# Starting storing packets sent through the pipe when a
# batch arriving from BCI2000 completes. This is signalled
# by the last Signal(X,Y) received.
self.sendPacket.value = True
lastStamp = bciComms.discardTill(self.pipeReceive, self.endPacketRegex, self.headerRegex)
lastStamp = int(lastStamp)
collectProc = Process(target=bciComms.collectData,
args=(self.pipeReceive, time, self.headerRegex, self.endPacketRegex, q, lastStamp))
collectProc.start()
window.drawArrowTimed(param["x"], param["y"], 200, param["theta"], time, True)
bciData[t][c] = q.get()
self.writeFile(bciData[t][c], t, c)
self.sendPacket.value = False
# Write the training data to a file, and get the formated training data
fName, _ = QtGui.QFileDialog.getSaveFileName(self, "Save the test data", "", "JSON (*.json)", "JSON (*.json)")
# User didn't pick a filename, ask them again and if repeated return
if fName == "":
self.showMessage("You didn't select a file! Try again otherwise data is lost")
fName, _ = QtGui.QFileDialog.getSaveFileName(self, "Save the test data", "", "JSON (*.json)", "JSON (*.json)")
if fName == "":
window.close()
return
formatedJson = None
# List of frequencies collected on
freqList = [int(x.split(" ")[0]) for x in channels]
freqList.sort()
with open(fName, "w") as f:
formatedJson = bciComms.processTrainData(bciData, freqList, f)
# Saves the training data to the instance field, trains the classifier and transitions to run screen
self.trainingDataFormater = FormatJson(formatedJson, loadDict=True)
if self.trainClassifier():
self.transitionToRun()
window.close()
class BciMain(QtGui.QMainWindow):
def __init__(self):
self.IP = '127.0.0.1' # socket.gethostname()
self.classifier = None
self.trainingDataFormater = None
# Default values
self.settings = {"port": 7337, "numTrials": 10, "trialLength": 10,
"channels": {},
"freqMap": {
"15 Hz": {"x": 200, "y": 900, "theta": 270},
"22 Hz": {"x": 1480, "y": 900, "theta": 270},
"17 Hz": {"x": 1560, "y": 760, "theta": 0},
"20 Hz": {"x": 120, "y": 750, "theta": 180},
"12 Hz": {"x": 820, "y": 900, "theta": 270},
"25 Hz": {"x": 1090, "y": 750, "theta": 270}
}
}
self.directory = os.path.dirname(os.path.realpath(__file__))
self.settingsFile = os.path.join(self.directory, "config.json")
super(BciMain, self).__init__()
# Read in settings file ("config.json")
self.loadSettings()
# Set up the menu bar
self.toolBar()
# Add option dialog for loading a file or
# starting a training session
self.initialPrompt()
# Networking to BCI
self.sendPacket = Value(ctypes.c_bool, False, lock=False)
self.pipeReceive, self.pipeSend = Pipe(True)
self.proc = Process(target=bciComms.bciConnection, args=(self.IP, int(self.settings["port"]), self.sendPacket, self.pipeSend))
self.proc.start()
self.headerRegex = r"SourceTime[\s]+([0-9]+)"
self.sendPacket.value = True
self.endPacketRegex = bciComms.determineEndRegex(self.pipeReceive)
print self.endPacketRegex
self.sendPacket.value = False
# Set size and title
self.setGeometry(300, 300, 640, 480)
self.center()
self.setWindowTitle('BCI Operator')
# Bring to forefront
self.show()
self.raise_()
def closeEvent(self, event):
""" On close it closes the socket """
if self.proc.is_alive():
self.proc.terminate()
def writeFile(self, data, trial, channel):
f = open("temp/"+str(trial)+str(channel)+".txt", 'w')
for d in data:
f.write(d)
def trainingScreen(self):
""" Displays a training screen that displays arrows to different frequency lights
and records the data within each of these periods. Saves this data in a JSON file """
window = drawWidget(self)
# Creates a random ordering of the trials
channels = [str(i) for i in self.settings["channels"].values()
if not i == "None"]
trials = self.settings["numTrials"]
time = self.settings["trialLength"]
bciData = {}
for t in range(trials):
print (t+1), "/", trials
random.shuffle(channels)
bciData[t] = {}
for c in channels:
# Setup
param = self.settings["freqMap"][c]
q = multiQueue()
window.drawCrossTimed(0.4, 3, True)
# Starting storing packets sent through the pipe when a
# batch arriving from BCI2000 completes. This is signalled
# by the last Signal(X,Y) received.
self.sendPacket.value = True
lastStamp = bciComms.discardTill(self.pipeReceive, self.endPacketRegex, self.headerRegex)
lastStamp = int(lastStamp)
collectProc = Process(target=bciComms.collectData,
args=(self.pipeReceive, time, self.headerRegex, self.endPacketRegex, q, lastStamp))
collectProc.start()
window.drawArrowTimed(param["x"], param["y"], 200, param["theta"], time, True)
bciData[t][c] = q.get()
self.writeFile(bciData[t][c], t, c)
self.sendPacket.value = False
# Write the training data to a file, and get the formated training data
fName, _ = QtGui.QFileDialog.getSaveFileName(self, "Save the test data", "", "JSON (*.json)", "JSON (*.json)")
# User didn't pick a filename, ask them again and if repeated return
if fName == "":
self.showMessage("You didn't select a file! Try again otherwise data is lost")
fName, _ = QtGui.QFileDialog.getSaveFileName(self, "Save the test data", "", "JSON (*.json)", "JSON (*.json)")
if fName == "":
window.close()
return
formatedJson = None
# List of frequencies collected on
freqList = [int(x.split(" ")[0]) for x in channels]
freqList.sort()
with open(fName, "w") as f:
formatedJson = bciComms.processTrainData(bciData, freqList, f)
# Saves the training data to the instance field, trains the classifier and transitions to run screen
self.trainingDataFormater = FormatJson(formatedJson, loadDict=True)
if self.trainClassifier():
self.transitionToRun()
window.close()
def trainClassifier(self):
""" Trains the classifier. If any error occurs, it prints the exception.
Returns true if training was successful and false otherwise """
try:
self.classifier = NaiveBayes(self.trainingDataFormater.data())
return True
except Exception as e:
BciMain.showMessage("Could not train classifier. Error:\n" + str(e))
return False
def transitionToRun(self):
""" Sets the main bci app to display a run button to start a run. This
should only happen after the classifier was properly trained """
# Layout manager
hbox = QtGui.QHBoxLayout()
widget = QtGui.QWidget()
# Buttons
btn1 = QtGui.QPushButton("Start Run", widget)
btn1.clicked.connect(self.runScreen)
hbox.addWidget(btn1)
widget.setLayout(hbox)
self.setCentralWidget(widget)
def runScreen(self):
from BCIFront.gui.questions import questionsRunScreen
self.run = questionsRunScreen(self, self.classifier)
# Reads in file and updates dictionary. If it doesn't exist
# it is created with default values
def loadSettings(self):
""" Loads settings from the config.json file in the directory containing
this file. If the file doesn't exist, as would be the case on the first
run, the file is made with default settings
"""
# Try to open file
try:
jFile = open(self.settingsFile, "r")
except IOError:
# Doesn't exist so we create it
jFile = open(self.settingsFile, "w")
json.dump(self.settings, jFile)
return
# Try to parse json file
try:
self.settings = json.load(jFile)
#print self.settings
#print "File: " + json.load(jFile)
except ValueError:
self.showMessage("""Could not load settings file.\n
To reset, delete the config.json file""")
def center(self):
""" Centers the application in the middle of the screen """
qr = self.frameGeometry()
cp = QtGui.QDesktopWidget().availableGeometry().center()
qr.moveCenter(cp)
self.move(qr.topLeft())
def initialPrompt(self):
""" Returns a widget that contains the buttons to either load a
training or start a new one """
# Layout manager
hbox = QtGui.QHBoxLayout()
widget = QtGui.QWidget()
# Buttons
btn1 = QtGui.QPushButton("Start Training", widget)
btn1.clicked.connect(self.trainingScreen)
btn2 = QtGui.QPushButton("Load Train File", widget)
btn2.clicked.connect(self.loadFile)
hbox.addWidget(btn1)
hbox.addWidget(btn2)
widget.setLayout(hbox)
self.setCentralWidget(widget)
def toolBar(self):
""" Creates a tool bar for the main application """
ipAction= QtGui.QAction('&IP', self)
ipAction.triggered.connect(self.showIP)
settingAction = QtGui.QAction('&Settings', self)
settingAction.setStatusTip('Settings Page')
settingAction.triggered.connect(self.settingsPage)
trainScreenAction = QtGui.QAction('&Train Screen', self)
trainScreenAction.setStatusTip('Training Screen')
trainScreenAction.triggered.connect(self.initialPrompt)
exitAction = QtGui.QAction('&Exit', self)
exitAction.setStatusTip('Exit application')
exitAction.triggered.connect(self.close)
self.toolbar = self.addToolBar("Bar")
self.toolbar.addAction(ipAction)
self.toolbar.addAction(settingAction)
self.toolbar.addAction(trainScreenAction)
self.toolbar.addAction(exitAction)
def showIP(self):
""" Displays a dialog showing the computers IP. This is usefully
when setting the BCI2000 output parameter
"""
# Get IP
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
try:
s.connect(("gmail.com",80))
ip = s.getsockname()[0]
self.showMessage("IP: " + ip + "\nHostname: " + socket.gethostname())
except socket.error as e:
self.showMessage("""Could not find IP. Possibly not connected to
internet. Error code: \n\n""" + str(e))
finally:
s.close()
@classmethod
def showMessage(cls, string):
""" Shows a popup screen with the given message """
msgBox = QtGui.QMessageBox()
msgBox.setText(string)
msgBox.show()
msgBox.raise_()
msgBox.exec_()
def settingsPage(self):
""" Pops up a setting page and then on exit, updates the settings
and saves them to a file
"""
s = SettingsPage(self.settings)
if s.exec_() == QtGui.QDialog.Accepted:
self.settings["port"] = int(s.portEdit.text())
self.settings["numTrials"] = int(s.trialNumbEdit.text())
self.settings["trialLength"] = int(float(s.trialLengthEdit.text()))
self.settings["channels"] = {}
# Create a dictionary of the channels to their set index
for i, combo in enumerate(s.channelValues):
self.settings["channels"][str(i)] = combo.currentText()
jFile = open(self.settingsFile, "w")
json.dump(self.settings, jFile)
# Prompts for a file and then formats it and saves the list
# of [("label", [data])] to an instance variable
def loadFile(self):
""" Prompts the user for a training file and if it is appropriately formated,
trains the classifier. Supports both old matlab format and the json format
generated by this program
"""
fname, _ = QtGui.QFileDialog.getOpenFileName(self, 'Open file')
if fname == "":
self.showMessage("No file was trained with!")
return
try:
formater = FormatJson(fname)
self.trainingDataFormater = formater
if self.trainClassifier():
self.transitionToRun()
except Exception as e:
self.showMessage("Couldn't open file: \n" + str(e))