def _start_live_capture(self):
""" Starts the process of continuous capture from an attached camera.
"""
if self._scanner is not None:
self._stop_live_capture()
self._scanner = CameraScanner(self._new_scan_queue)
self._scanner.stream_camera(config=self._config)
def _start_live_capture(self):
""" Starts the process of continuous capture from an attached camera.
"""
if self._scanner is not None:
self._stop_live_capture()
self._scanner = CameraScanner(self._new_scan_queue)
self._scanner.stream_camera(config=self._config)
class DiamondBarcodeMainWindow(QtGui.QMainWindow):
""" Main GUI window for the Barcode Scanner App.
"""
def __init__(self, config_file):
super(DiamondBarcodeMainWindow, self).__init__()
self._config = BarcodeConfig(config_file)
self._scanner = None
# Queue that holds new results generated in continuous scanning mode
self._new_scan_queue = multiprocessing.Queue()
# Timer that controls how often new scan results are looked for
self._result_timer = QtCore.QTimer()
self._result_timer.timeout.connect(self._read_new_scan_queue)
self._result_timer.start(1000)
# UI elements
self.recordTable = None
self.barcodeTable = None
self.imageFrame = None
self._init_ui()
def _init_ui(self):
""" Create the basic elements of the user interface.
"""
self.setGeometry(100, 100, 1020, 650)
self.setWindowTitle("Diamond Puck Barcode Scanner")
self.setWindowIcon(QtGui.QIcon("web.png"))
self.init_menu_bar()
# Barcode table - lists all the barcodes in a record
self.barcodeTable = BarcodeTable(self._config)
# Image frame - displays image of the currently selected scan record
self.imageFrame = ImageFrame()
# Scan record table - lists all the records in the store
self.recordTable = ScanRecordTable(self.barcodeTable, self.imageFrame, self._config)
self._btn_begin = QPushButton("Start Scan")
self._btn_begin.setStyleSheet("font-size:20pt;")
self._btn_begin.setFixedSize(150, 60)
self._btn_begin.clicked.connect(self._start_live_capture)
self._btn_stop = QPushButton("Stop Scan")
self._btn_stop.setStyleSheet("font-size:20pt")
self._btn_stop.setFixedSize(150, 60)
self._btn_stop.clicked.connect(self._stop_live_capture)
hbox_btn = QHBoxLayout()
hbox_btn.addWidget(self._btn_begin)
hbox_btn.addWidget(self._btn_stop)
hbox_btn.addStretch()
# Create layout
hbox = QtGui.QHBoxLayout()
hbox.setSpacing(10)
hbox.addWidget(self.recordTable)
hbox.addWidget(self.barcodeTable)
hbox.addWidget(self.imageFrame)
hbox.addStretch(1)
vbox = QtGui.QVBoxLayout()
vbox.addLayout(hbox_btn)
vbox.addLayout(hbox)
main_widget = QtGui.QWidget()
main_widget.setLayout(vbox)
self.setCentralWidget(main_widget)
self.show()
def init_menu_bar(self):
"""Create and populate the menu bar.
"""
# Load from file action
load_action = QtGui.QAction(QtGui.QIcon("open.png"), "&From File...", self)
load_action.setShortcut("Ctrl+L")
load_action.setStatusTip("Load image from file to scan")
load_action.triggered.connect(self._scan_file_image)
# Continuous scanner mode
live_action = QtGui.QAction(QtGui.QIcon("open.png"), "&Camera Capture", self)
live_action.setShortcut("Ctrl+W")
live_action.setStatusTip("Capture continuously from camera")
live_action.triggered.connect(self._start_live_capture)
# Exit Application
exit_action = QtGui.QAction(QtGui.QIcon("exit.png"), "&Exit", self)
exit_action.setShortcut("Ctrl+Q")
exit_action.setStatusTip("Exit application")
exit_action.triggered.connect(QtGui.qApp.quit)
# Open options dialog
options_action = QtGui.QAction(QtGui.QIcon("exit.png"), "&Options", self)
options_action.setShortcut("Ctrl+O")
options_action.setStatusTip("Open Options Dialog")
options_action.triggered.connect(self._open_options_dialog)
# Create menu bar
menu_bar = self.menuBar()
file_menu = menu_bar.addMenu("&File")
file_menu.addAction(exit_action)
scan_menu = menu_bar.addMenu("&Scan")
scan_menu.addAction(load_action)
scan_menu.addAction(live_action)
option_menu = menu_bar.addMenu("&Option")
option_menu.addAction(options_action)
def _open_options_dialog(self):
dialog = BarcodeConfigDialog(self._config)
dialog.exec_()
def _read_new_scan_queue(self):
""" Called every second; read any new results from the scan results queue,
store them and display them.
"""
if not self._new_scan_queue.empty():
# Get the result
plate, cv_image = self._new_scan_queue.get(False)
# Store scan results and display in GUI
self.recordTable.add_record_frame(plate, cv_image)
if plate.is_full_valid():
# Notify user of new scan
print("Scan Recorded")
winsound.Beep(4000, 500) # frequency, duration
def _scan_file_image(self):
"""Load and process (scan for barcodes) an image from file
"""
filepath = str(QtGui.QFileDialog.getOpenFileName(self, "Open file"))
if filepath:
cv_image = Image.from_file(filepath)
gray_image = cv_image.to_grayscale()
# Scan the image for barcodes
plate_type = self._config.plate_type.value()
barcode_size = self._config.barcode_size.value()
SlotScanner.DEBUG = self._config.slot_images.value()
SlotScanner.DEBUG_DIR = self._config.slot_image_directory.value()
if plate_type == "None":
scanner = OpenScanner(barcode_size)
else:
scanner = GeometryScanner(plate_type, barcode_size)
scan_result = scanner.scan_next_frame(gray_image, is_single_image=True)
plate = scan_result.plate()
# If the scan was successful, store the results
if plate is not None:
self.recordTable.add_record(plate, cv_image)
else:
error = "There was a problem scanning the image:\n{}".format(scan_result.error())
QtGui.QMessageBox.warning(self, "Scanning Error", error)
def _start_live_capture(self):
""" Starts the process of continuous capture from an attached camera.
"""
if self._scanner is not None:
self._stop_live_capture()
self._scanner = CameraScanner(self._new_scan_queue)
self._scanner.stream_camera(config=self._config)
def _stop_live_capture(self):
if self._scanner is not None:
self._scanner.kill()
self._scanner = None
class DiamondBarcodeMainWindow(QtGui.QMainWindow):
""" Main GUI window for the Barcode Scanner App.
"""
def __init__(self, config_file):
super(DiamondBarcodeMainWindow, self).__init__()
self._config = BarcodeConfig(config_file)
self._scanner = None
# Queue that holds new results generated in continuous scanning mode
self._new_scan_queue = multiprocessing.Queue()
# Timer that controls how often new scan results are looked for
self._result_timer = QtCore.QTimer()
self._result_timer.timeout.connect(self._read_new_scan_queue)
self._result_timer.start(1000)
# UI elements
self.recordTable = None
self.barcodeTable = None
self.imageFrame = None
self._init_ui()
def _init_ui(self):
""" Create the basic elements of the user interface.
"""
self.setGeometry(100, 100, 1020, 650)
self.setWindowTitle('Diamond Puck Barcode Scanner')
self.setWindowIcon(QtGui.QIcon('web.png'))
self.init_menu_bar()
# Barcode table - lists all the barcodes in a record
self.barcodeTable = BarcodeTable(self._config)
# Image frame - displays image of the currently selected scan record
self.imageFrame = ImageFrame()
# Scan record table - lists all the records in the store
self.recordTable = ScanRecordTable(self.barcodeTable, self.imageFrame, self._config)
self._btn_begin = QPushButton("Start Scan")
self._btn_begin.setStyleSheet("font-size:20pt;")
self._btn_begin.setFixedSize(150, 60)
self._btn_begin.clicked.connect(self._start_live_capture)
self._btn_stop = QPushButton("Stop Scan")
self._btn_stop.setStyleSheet("font-size:20pt")
self._btn_stop.setFixedSize(150, 60)
self._btn_stop.clicked.connect(self._stop_live_capture)
hbox_btn = QHBoxLayout()
hbox_btn.addWidget(self._btn_begin)
hbox_btn.addWidget(self._btn_stop)
hbox_btn.addStretch()
# Create layout
hbox = QtGui.QHBoxLayout()
hbox.setSpacing(10)
hbox.addWidget(self.recordTable)
hbox.addWidget(self.barcodeTable)
hbox.addWidget(self.imageFrame)
hbox.addStretch(1)
vbox = QtGui.QVBoxLayout()
vbox.addLayout(hbox_btn)
vbox.addLayout(hbox)
main_widget = QtGui.QWidget()
main_widget.setLayout(vbox)
self.setCentralWidget(main_widget)
self.show()
def init_menu_bar(self):
"""Create and populate the menu bar.
"""
# Load from file action
load_action = QtGui.QAction(QtGui.QIcon('open.png'), '&From File...', self)
load_action.setShortcut('Ctrl+L')
load_action.setStatusTip('Load image from file to scan')
load_action.triggered.connect(self._scan_file_image)
# Continuous scanner mode
live_action = QtGui.QAction(QtGui.QIcon('open.png'), '&Camera Capture', self)
live_action.setShortcut('Ctrl+W')
live_action.setStatusTip('Capture continuously from camera')
live_action.triggered.connect(self._start_live_capture)
# Exit Application
exit_action = QtGui.QAction(QtGui.QIcon('exit.png'), '&Exit', self)
exit_action.setShortcut('Ctrl+Q')
exit_action.setStatusTip('Exit application')
exit_action.triggered.connect(QtGui.qApp.quit)
# Open options dialog
options_action = QtGui.QAction(QtGui.QIcon('exit.png'), '&Options', self)
options_action.setShortcut('Ctrl+O')
options_action.setStatusTip('Open Options Dialog')
options_action.triggered.connect(self._open_options_dialog)
# Create menu bar
menu_bar = self.menuBar()
file_menu = menu_bar.addMenu('&File')
file_menu.addAction(exit_action)
scan_menu = menu_bar.addMenu('&Scan')
scan_menu.addAction(load_action)
scan_menu.addAction(live_action)
option_menu = menu_bar.addMenu('&Option')
option_menu.addAction(options_action)
def _open_options_dialog(self):
dialog = BarcodeConfigDialog(self._config)
dialog.exec_()
def _read_new_scan_queue(self):
""" Called every second; read any new results from the scan results queue,
store them and display them.
"""
if not self._new_scan_queue.empty():
# Get the result
plate, cv_image = self._new_scan_queue.get(False)
# Store scan results and display in GUI
self.recordTable.add_record_frame(plate, cv_image)
if plate.is_full_valid():
# Notify user of new scan
print("Scan Recorded")
winsound.Beep(4000, 500) # frequency, duration
def _scan_file_image(self):
"""Load and process (scan for barcodes) an image from file
"""
filepath = str(QtGui.QFileDialog.getOpenFileName(self, 'Open file'))
if filepath:
cv_image = Image.from_file(filepath)
gray_image = cv_image.to_grayscale()
# Scan the image for barcodes
plate_type = self._config.plate_type.value()
barcode_size = self._config.barcode_size.value()
SlotScanner.DEBUG = self._config.slot_images.value()
SlotScanner.DEBUG_DIR = self._config.slot_image_directory.value()
if plate_type == "None":
scanner = OpenScanner(barcode_size)
else:
scanner = GeometryScanner(plate_type, barcode_size)
scan_result = scanner.scan_next_frame(gray_image, is_single_image=True)
plate = scan_result.plate()
# If the scan was successful, store the results
if plate is not None:
self.recordTable.add_record(plate, cv_image)
else:
error = "There was a problem scanning the image:\n{}".format(scan_result.error())
QtGui.QMessageBox.warning(self, "Scanning Error", error)
def _start_live_capture(self):
""" Starts the process of continuous capture from an attached camera.
"""
if self._scanner is not None:
self._stop_live_capture()
self._scanner = CameraScanner(self._new_scan_queue)
self._scanner.stream_camera(config=self._config)
def _stop_live_capture(self):
if self._scanner is not None:
self._scanner.kill()
self._scanner = None