- # expose the signals of the worker
- self.measured = self.worker.measured
- self.error = self.worker.error
-
- self.thread.start()
-
- def start(self):
- '''Starts sampling'''
- self._start_signal.emit()
-
- def stop(self):
- '''Stops sampling and the background thread.'''
- self.worker.stop_sampling()
- self.thread.quit()
- # the timeout is needed when the demo device is used, because it
- # produces so much outstanding data that quitting takes a long time
- self.thread.wait(500)
-
- def sr_pkg_version(self):
- '''Returns the version number of the libsigrok package.'''
- return self.worker.sr_pkg_version
-
- def sr_lib_version(self):
- '''Returns the version number fo the libsigrok library.'''
- return self.worker.sr_lib_version
-
-class SigrokMeter(QtGui.QMainWindow):
- '''The main window of the application.'''
-
- def __init__(self, thread):
- super(SigrokMeter, self).__init__()
- self.setup_ui()
-
- self.inf = float('inf')
-
- self.thread = thread
- self.thread.measured.connect(self.update, QtCore.Qt.QueuedConnection)
- self.thread.error.connect(self.error)
- self.thread.start()
-
- def setup_ui(self):
- self.setWindowTitle('sigrok-meter')
- self.setMinimumHeight(130)
- self.setMinimumWidth(260)
-
- p = os.path.abspath(os.path.dirname(__file__))
- p = os.path.join(p, 'sigrok-logo-notext.png')
- self.setWindowIcon(QtGui.QIcon(p))
-
- actionQuit = QtGui.QAction(self)
- actionQuit.setText('&Quit')
- actionQuit.setIcon(QtGui.QIcon.fromTheme('application-exit'))
- actionQuit.setShortcut('Ctrl+Q')
- actionQuit.triggered.connect(self.close)
-
- actionAbout = QtGui.QAction(self)
- actionAbout.setText('&About')
- actionAbout.setIcon(QtGui.QIcon.fromTheme('help-about'))
- actionAbout.triggered.connect(self.show_about)
-
- menubar = self.menuBar()
- menuFile = menubar.addMenu('&File')
- menuFile.addAction(actionQuit)
- menuHelp = menubar.addMenu('&Help')
- menuHelp.addAction(actionAbout)
-
- self.lblValue = QtGui.QLabel('waiting for data...')
- self.lblValue.setAlignment(QtCore.Qt.AlignCenter)
- font = self.lblValue.font()
- font.setPointSize(font.pointSize() * 1.7)
- font.setBold(True)
- self.lblValue.setFont(font)
- self.setCentralWidget(self.lblValue)
- self.centralWidget().setContentsMargins(0, 0, 0, 0)
-
- self.lblDevName = QtGui.QLabel()
- self.lblDevName.setToolTip('Name of used measurement device.')
- self.statusBar().insertWidget(0, self.lblDevName, 10)
- self.lblTime = QtGui.QLabel()
- self.lblTime.setToolTip('Time of the last measurement.')
- self.statusBar().insertWidget(1, self.lblTime)
-
- self.statusBar().setSizeGripEnabled(False)
-
- @QtCore.Slot()
- def show_about(self):
- text = textwrap.dedent('''\
- <div align="center">
- <b>sigrok-meter</b><br/>
- 0.1.0<br/>
- Using libsigrok {} (lib version {}).<br/>
- <a href='http://www.sigrok.org'>
- http://www.sigrok.org</a><br/>
- <br/>
- This program comes with ABSOLUTELY NO WARRANTY;<br/>
- for details visit
- <a href='http://www.gnu.org/licenses/gpl.html'>
- http://www.gnu.org/licenses/gpl.html</a>
- </div>
- '''.format(self.thread.sr_pkg_version(), self.thread.sr_lib_version()))
-
- QtGui.QMessageBox.about(self, 'About sigrok-meter', text)
-
- def format_unit(self, u):
- units = {
- sr.Unit.VOLT: 'V',
- sr.Unit.AMPERE: 'A',
- sr.Unit.OHM: u'\u03A9',
- sr.Unit.FARAD: 'F',
- sr.Unit.KELVIN: 'K',
- sr.Unit.CELSIUS: u'\u00B0C',
- sr.Unit.FAHRENHEIT: u'\u00B0F',
- sr.Unit.HERTZ: 'Hz',
- sr.Unit.PERCENTAGE: '%',
- # sr.Unit.BOOLEAN
- sr.Unit.SECOND: 's',
- sr.Unit.SIEMENS: 'S',
- sr.Unit.DECIBEL_MW: 'dBu',
- sr.Unit.DECIBEL_VOLT: 'dBV',
- # sr.Unit.UNITLESS
- sr.Unit.DECIBEL_SPL: 'dB',
- # sr.Unit.CONCENTRATION
- sr.Unit.REVOLUTIONS_PER_MINUTE: 'rpm',
- sr.Unit.VOLT_AMPERE: 'VA',
- sr.Unit.WATT: 'W',
- sr.Unit.WATT_HOUR: 'Wh',
- sr.Unit.METER_SECOND: 'm/s',
- sr.Unit.HECTOPASCAL: 'hPa',
- sr.Unit.HUMIDITY_293K: '%rF',
- sr.Unit.DEGREE: u'\u00B0',
- sr.Unit.HENRY: 'H'
- }
-
- return units.get(u, '')
-
- def format_mqflags(self, mqflags):
- if sr.QuantityFlag.AC in mqflags:
- s = 'AC'
- elif sr.QuantityFlag.DC in mqflags:
- s = 'DC'
- else:
- s = ''
-
- return s
-
- def format_mag(self, mag):
- if mag == self.inf:
- return u'\u221E'
- return '{:f}'.format(mag)
-
- @QtCore.Slot(object)
- def update(self, data):
- '''Updates the labels with new measurement values.'''
-
- device, mag, unit, mqflags = data
-
- unit_str = self.format_unit(unit)
- mqflags_str = self.format_mqflags(mqflags)
- mag_str = self.format_mag(mag)
- value = ' '.join([mag_str, unit_str, mqflags_str])
-
- n = datetime.datetime.now().time()
- now = '{:02}:{:02}:{:02}.{:03}'.format(
- n.hour, n.minute, n.second, n.microsecond / 1000)