def init_ui(self):
vbox = QtGui.QVBoxLayout()
vbox.setContentsMargins(0, 0, 0, 0)
self.setLayout(vbox)
self.plot_widget = pg.PlotWidget()
self.plot_widget.hideAxis('bottom')
self.plot_widget.setLabel('left', units='Hz')
self.plot_curve = self.plot_widget.plot(pen='w')
self.plot_curve.setData(x=range(self.buffer_length))
vbox.addWidget(self.plot_widget)
log_group_box = QtGui.QGroupBox()
log_group_box.setTitle('Logging')
gbgrid = QtGui.QGridLayout()
gbgrid.setAlignment(QtCore.Qt.AlignVCenter)
log_group_box.setLayout(gbgrid)
self.log_file_select_widget = SaveFileSelectWidget(description='Save to:', parent=self.parent())
self.log_file_select_widget.changed.connect(self.update_logging_file_path)
gbgrid.addWidget(self.log_file_select_widget, 1, 1, 1, 1)
self.log_check_box = QtGui.QCheckBox('Enable Logging')
self.log_check_box.stateChanged.connect(self.toggle_logging)
gbgrid.addWidget(self.log_check_box, 1, 0, 2, 1)
help_label = QtGui.QLabel('Values are appended to log file, format: #unix timestamp#,#value# (CSV)')
help_label.setAlignment(QtCore.Qt.AlignCenter)
help_label.setDisabled(True)
help_label.setWordWrap(True)
gbgrid.addWidget(help_label, 2, 1, 1, 1)
gbgrid.setColumnStretch(1, 2)
gbgrid.setHorizontalSpacing(30)
vbox.addWidget(log_group_box)
class WLGraph(QtGui.QWidget):
def __init__(self, buffer_length=100, parent=None):
super(WLGraph, self).__init__(parent)
self.buffer_length = buffer_length
self.rbuffer = deque(maxlen=buffer_length)
self.init_ui()
# turn off logging by default
self.is_logging = False
self.toggle_logging(0)
self.worker_thread = QtCore.QThread(self)
self.worker = WLGraphLoggingWorker()
self.worker.moveToThread(self.worker_thread)
self.worker_thread.start()
#def __del__(self):
#self.worker_thread.quit()
#self.worker_thread.wait()
def init_ui(self):
vbox = QtGui.QVBoxLayout()
vbox.setContentsMargins(0, 0, 0, 0)
self.setLayout(vbox)
self.plot_widget = pg.PlotWidget()
self.plot_widget.hideAxis('bottom')
self.plot_widget.setLabel('left', units='Hz')
self.plot_curve = self.plot_widget.plot(pen='w')
self.plot_curve.setData(x=range(self.buffer_length))
vbox.addWidget(self.plot_widget)
log_group_box = QtGui.QGroupBox()
log_group_box.setTitle('Logging')
gbgrid = QtGui.QGridLayout()
gbgrid.setAlignment(QtCore.Qt.AlignVCenter)
log_group_box.setLayout(gbgrid)
self.log_file_select_widget = SaveFileSelectWidget(description='Save to:', parent=self.parent())
self.log_file_select_widget.changed.connect(self.update_logging_file_path)
gbgrid.addWidget(self.log_file_select_widget, 1, 1, 1, 1)
self.log_check_box = QtGui.QCheckBox('Enable Logging')
self.log_check_box.stateChanged.connect(self.toggle_logging)
gbgrid.addWidget(self.log_check_box, 1, 0, 2, 1)
help_label = QtGui.QLabel('Values are appended to log file, format: #unix timestamp#,#value# (CSV)')
help_label.setAlignment(QtCore.Qt.AlignCenter)
help_label.setDisabled(True)
help_label.setWordWrap(True)
gbgrid.addWidget(help_label, 2, 1, 1, 1)
gbgrid.setColumnStretch(1, 2)
gbgrid.setHorizontalSpacing(30)
vbox.addWidget(log_group_box)
@pyqtSlot(str)
def update_logging_file_path(self, file_path):
self.worker.logging_file_path = str(file_path)
print 'logging to: %s' % file_path
@pyqtSlot(int)
def toggle_logging(self, state):
if (state == 2):
self.is_logging = True
self.log_file_select_widget.enable()
else:
self.is_logging = False
self.log_file_select_widget.disable()
@pyqtSlot(float)
def push_value(self, value):
if (self.is_logging):
line = '%f,%f' % (time.time(), value)
self.worker.logging_line_added.emit(line)
self.rbuffer.append(value)
self.plot_curve.setData(y=list(self.rbuffer))
