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SeabreezeGui.py
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SeabreezeGui.py
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import sys
import numpy as np
from PyQt5 import QtWidgets
from PyQt5.QtCore import pyqtSlot, pyqtSignal, QRunnable, QThreadPool, QObject
from ui_files.ui_SeabreezeGui import Ui_MainWindow
from seabreeze.spectrometers import Spectrometer, SeaBreezeError
import time
import os
from datetime import datetime
import pyqtgraph as pg
import qdarkstyle
from pyqtgraph.Qt import QtGui
os.environ['PYQTGRAPH_QT_LIB'] = 'PyQt5'
# Switch to using white background and black foreground
pg.setConfigOption('background', pg.mkColor(25, 35, 45))
class WorkerSignals(QObject):
finished = pyqtSignal()
error = pyqtSignal(tuple)
result = pyqtSignal(object)
class Worker(QRunnable):
def __init__(self, parent, spectrometer):
super(Worker, self).__init__()
self.signals = WorkerSignals()
self.continue_acquisition = True
self.parent = parent
self.spectrometer = spectrometer
@pyqtSlot()
def run(self):
while self.continue_acquisition:
res = self.spectrometer.intensities()
self.signals.result.emit(res)
self.continue_acquisition = self.parent.get_acquisition_state('spec')
self.signals.finished.emit()
class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
self.setupUi(self)
# self.plot_camera_layout.addWidget(self.plot_camera.toolbar)
self.thread_pool = QThreadPool()
print("Multi-threading with maximum %d threads" % self.thread_pool.maxThreadCount())
# Testing variables
self.t_start = time.time()
self.plotted_images = 0
self.averaged_images = 0
self.busy = False
# Spectrometer setup
# self.spec_serial_nbr = 'FLMS15932'
self.spec_serial_nbr = 'FLMS12200'
self.plot_item = self.spectrum_plot.addPlot()
self.plot_item.enableAutoRange('xy', False)
self.plot_item.setYRange(0, 2**16)
self.plot_item.setXRange(400, 1000)
self.plot_item.setLabel('left', "Counts",)
self.plot_item.setLabel('bottom', "Wavelength")
self.plot_item.showGrid(x=True, y=True)
# self.plot_spec.axes.set_xlim([340, 1020])
# self.plot_spec.axes.set_ylim([0, 65000])
self.integration_time = 10
self.spec_acquisition_state = False
self.spectrometer = None
self._plot_ref = None
self.wavelengths = np.zeros((2048,))
self.intensities = np.zeros((2048,))
self.connect_spec()
self.spectrum_pending = False
self.connect_signals()
def connect_signals(self):
self.bt_spec_set_int_time.clicked.connect(self.set_integration_time)
self.bt_spec_acquire.clicked.connect(self.acquire_spectrum)
self.rb_spec_contin_acquisition.clicked.connect(self.change_spec_acquisition_state)
self.action_connect_spec.triggered.connect(self.connect_spec)
self.action_disconnect_spec.triggered.connect(self.disconnect_spec)
self.action_save.triggered.connect(self.save_current)
def get_acquisition_state(self, device):
if device == 'camera':
return self.camera_acquisition_state
elif device == 'spec':
return self.spec_acquisition_state
@pyqtSlot()
def connect_spec(self):
try:
self.spectrometer = Spectrometer.from_serial_number(self.spec_serial_nbr)
except SeaBreezeError:
print('Could not connect to spectrometer.') # TODO: Write message to user
else:
self.lbl_spec_status.setText('Connected to ' + self.spec_serial_nbr)
self.action_connect_spec.setEnabled(False)
self.action_disconnect_spec.setEnabled(True)
self.gb_spec.setEnabled(True)
# Acquire first spectrum and plot it to get _plot_ref:
self.set_integration_time()
self.wavelengths = self.spectrometer.wavelengths()
self.intensities = self.spectrometer.intensities()
self._plot_ref = self.plot_item.plot(self.wavelengths, self.intensities)
@pyqtSlot()
def disconnect_spec(self):
self.spectrometer.close()
self.lbl_spec_status.setText('No spectrometer connected')
self.action_connect_spec.setEnabled(True)
self.action_disconnect_spec.setEnabled(False)
self.gb_spec.setEnabled(False)
@pyqtSlot()
def set_integration_time(self):
self.integration_time = self.sb_spec_int_time.value()
self.spectrometer.integration_time_micros(self.integration_time * 1000)
@pyqtSlot()
def acquire_spectrum(self):
print('Acquiring...')
worker = Worker(self, self.spectrometer)
worker.signals.result.connect(self.update_plot)
worker.signals.finished.connect(self.worker_finished)
self.spec_acquisition_state = False
self.thread_pool.start(worker)
@pyqtSlot(bool)
def change_spec_acquisition_state(self, value):
self.bt_spec_acquire.setEnabled(not value)
if value:
self.spec_acquisition_state = True
print('Acquiring...')
worker = Worker(self, self.spectrometer)
worker.signals.result.connect(self.update_plot)
worker.signals.finished.connect(self.worker_finished)
# self.signals.stop_acquisition.connect(worker.stop_acquisition)
self.thread_pool.start(worker)
else:
print('Stopping acquisition...')
self.spec_acquisition_state = False
def is_busy(self):
return self.busy
@pyqtSlot(object)
def update_plot(self, value):
self.busy = True
# t_start = time.time()
self.intensities = value
# # Matplotlib
# self._plot_ref.set_ydata(self.intensities)
# self.plot_spec.draw()
# Pyqtgraph
self._plot_ref.setData(self.wavelengths, self.intensities)
# self.t_plot = time.time()
self.spectrum_pending = False
# print('Plotted spectrum in %.2f ms' % ((time.time() - t_start) * 1e3))
self.busy = False
@pyqtSlot()
def worker_finished(self):
print('Worker finished')
print('Handled %d images. Averaged %d and plotted %d' % (self.averaged_images + self.plotted_images,
self.averaged_images, self.plotted_images))
@pyqtSlot()
def save_current(self):
save_dir = QtWidgets.QFileDialog.getExistingDirectory(self,
'Select a folder to save in',
'D:\\', # TODO: Change to OS independent
QtWidgets.QFileDialog.ShowDirsOnly)
if save_dir:
now = datetime.now()
np.savetxt(os.path.join(save_dir, now.strftime("%Y%m%d-%H%M%S") + '_spectrum.dat'),
np.array([self.wavelengths, self.intensities]).T)
def closeEvent(self, event):
if self.spectrometer:
self.spectrometer.close()
event.accept()
@staticmethod
def print_output(s):
print(s)
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
app.setStyle("Fusion")
app.setStyleSheet(qdarkstyle.load_stylesheet(qt_api=os.environ['PYQTGRAPH_QT_LIB']))
window = MainWindow()
window.show()
app.exec_()