def __init__(self, hostname, port=9998, interval=.1, alarm=None):
# run the base class constructor
super().__init__()
# initialize the connection
self.hostname = hostname
self.port = port
self.initialize()
# set some properties
self.setWindowTitle(hostname)
self.setKeepDataAspectRatio(True)
self.setColormap(normalization='log')
self.setYAxisInverted(True)
self.hasImage = False
self.alarm = alarm
self.waiting_for_frame = False
self.latest_request = time.time()
# a periodic timer triggers the update
self.timer = qt.QTimer(self)
self.timer.setInterval(interval * 1000.0)
self.timer.timeout.connect(self._update)
self.timer.start()
# Display mouseover position info
posInfo = [
('X', lambda x, y: int(x)),
('Y', lambda x, y: int(y)),
('Data', self._getActiveImageValue)]
self._positionWidget = tools.PositionInfo(plot=self, converters=posInfo)
self.statusBar().addWidget(self._positionWidget)
def testCustomConverters(self):
"""Test PositionInfo with custom converters"""
converters = [('Coords', lambda x, y: (int(x), int(y))),
('Radius', lambda x, y: numpy.sqrt(x * x + y * y)),
('Angle',
lambda x, y: numpy.degrees(numpy.arctan2(y, x)))]
positionWidget = tools.PositionInfo(plot=self.plot,
converters=converters)
self._test(positionWidget, ('Coords', 'Radius', 'Angle'))
def testFailingConverters(self):
"""Test PositionInfo with failing custom converters"""
def raiseException(x, y):
raise RuntimeError()
positionWidget = tools.PositionInfo(plot=self.plot,
converters=[('Exception',
raiseException)])
self._test(positionWidget, ['Exception'], error=2)
def testUpdate(self):
"""Test :meth:`PositionInfo.updateInfo`"""
calls = []
def update(calls, x, y): # Get number of calls
calls.append((x, y))
return len(calls)
positionWidget = tools.PositionInfo(
plot=self.plot,
converters=[('Call count', functools.partial(update, calls))])
positionWidget.updateInfo()
self.assertEqual(len(calls), 1)
def testDefaultConverters(self):
"""Test PositionInfo with default converters"""
positionWidget = tools.PositionInfo(plot=self.plot)
self._test(positionWidget, ('X', 'Y'))