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Martin Drechsler
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from pyqtgraph import dockarea
from pyqtgraph.Qt import QtGui, QtCore
from PyQt5.QtWidgets import QPushButton, QProgressBar, QLabel
import pyqtgraph as pg
import resources.scanFunctions as scanFunctions
from resources.messages import show_warning
Martin Drechsler
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class CustomSpinBox(pg.SpinBox):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
if self.opts['suffix'] == 'V': # fixing a context menu with some scales
self.setContextMenuPolicy(QtCore.Qt.CustomContextMenu)
self.customContextMenuRequested.connect(self._on_context_menu)
self.popMenu = QtGui.QMenu(self)
self.act_2_step = QtGui.QAction('2 mV step', self)
self.act_5_step = QtGui.QAction('5 mV step', self)
self.act_10_step = QtGui.QAction('10 mV step', self)
self.act_100_step = QtGui.QAction('100 mV step', self)
self.popMenu.addAction(self.act_2_step)
self.popMenu.addAction(self.act_5_step)
self.popMenu.addAction(self.act_10_step)
self.popMenu.addAction(self.act_100_step)
self.act_2_step.triggered.connect(lambda: self.setSingleStep(0.002))
self.act_5_step.triggered.connect(lambda: self.setSingleStep(0.005))
self.act_10_step.triggered.connect(lambda: self.setSingleStep(0.01))
self.act_100_step.triggered.connect(lambda: self.setSingleStep(0.1))
def _on_context_menu(self, point):
# show context menu
self.popMenu.exec_(self.mapToGlobal(point))
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class LaserControlLayout(pg.LayoutWidget):
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"""
A class for creating a layout with spinboxes and checkboxes to control a laser.
"""
_registry = []
blinkSignal = QtCore.pyqtSignal(bool, float)
def __init__(self, name, spinboxes = ['sbA', 'sbB'], checkboxes = ['cbA', 'cbB'], custom_geometry = False, blinkCheckbox = []):
super().__init__()
self._registry.append(self)
self.name = name
if custom_geometry != True:
self.layout.addWidget(QtGui.QLabel(self.name), 0, 0)
self.spinboxes = {}
self.checkboxes = {}
for i, sb_name in enumerate(spinboxes, start = 1):
self.spinboxes[sb_name] = CustomSpinBox(siPrefix=True, suffix='V')
if custom_geometry != True:
self.addWidget(QtGui.QLabel(sb_name), i, 0)
self.addWidget(self.spinboxes[sb_name], i, 1)
for i, cb_name in enumerate(checkboxes, start = 0):
self.checkboxes[cb_name] = QtGui.QCheckBox()
if custom_geometry != True:
row = len(spinboxes) + 1
self.addWidget(QtGui.QLabel(cb_name), row, 2*i)
self.addWidget(self.checkboxes[cb_name], row, 2*i + 1)
self.blinkCheckboxes = {}
self.blinkSpinboxes = {}
self.blinkTimers = {}
for i, cb_name in enumerate(blinkCheckbox, start=0):
self.blinkCheckboxes[cb_name] = QtGui.QCheckBox()
self.blinkCheckboxes[cb_name].stateChanged.connect(lambda: self.blink(cb_name))
self.blinkSpinboxes[cb_name] = CustomSpinBox(siPrefix=True, suffix='s', value = 1)
self.blinkSpinboxes[cb_name].setMinimum(0.01)
self.blinkTimers[cb_name] = QtCore.QTimer()
self.blinkTimers[cb_name].timeout.connect(self.checkboxes[cb_name].toggle)
if custom_geometry != True:
row = 2 + len(self.spinboxes)
self.addWidget(QtGui.QLabel('blink '+cb_name), row, 0)
self.addWidget(self.blinkCheckboxes[cb_name], row, 1)
self.addWidget(self.blinkSpinboxes[cb_name], row, 2)
def freeze(self):
for sb in self.spinboxes:
self.spinboxes[sb].setEnabled(False)
for cb in self.checkboxes:
self.checkboxes[cb].setEnabled(False)
def unfreeze(self):
for sb in self.spinboxes:
self.spinboxes[sb].setEnabled(True)
for cb in self.checkboxes:
self.checkboxes[cb].setEnabled(True)
def blink(self, cb_name):
T = self.blinkSpinboxes[cb_name].value()
if self.blinkCheckboxes[cb_name].isChecked():
print(' '.join((cb_name, 'blinking with period: ')), T)
self._initial_state = self.checkboxes[cb_name].isChecked()
self.blinkTimers[cb_name].start(T*1e3)
else:
print(' '.join((cb_name, 'blinking stopped')))
self.blinkTimers[cb_name].stop()
self.checkboxes[cb_name].setChecked(self._initial_state)
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class LaserScanLayout(pg.LayoutWidget):
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"""
A class for creating a layout for scanning a laser piezo.
It is important that the name parameter coincides with the name of the spinbox to scan.
"""
_registry = []
scanActionSignal = QtCore.pyqtSignal(object)
def __init__(self, name, signal_to_scan_layout):
super().__init__()
self._registry.append(self)
self.name = name
self.signal_to_scan_layout = signal_to_scan_layout
self.addWidget(QtGui.QLabel(self.name), 0, 0)
self.spinboxes = {}
self.spinboxes['start'] = CustomSpinBox(siPrefix=True, suffix='V')
self.spinboxes['stop'] = CustomSpinBox(siPrefix=True, suffix='V')
self.spinboxes['period'] = CustomSpinBox(siPrefix=True, suffix='s', step=1)
self.spinboxes['period'].setMinimum(0)
self.scan_button = QPushButton('Start scan')
self.scanpBar = QProgressBar(self)
self.scanLabelValue = QLabel(self)
self.addWidget(QtGui.QLabel('start'), 1, 0),
self.addWidget(self.spinboxes['start'], 1, 1)
self.addWidget(QtGui.QLabel('stop'), 2, 0)
self.addWidget(self.spinboxes['stop'], 2, 1)
self.addWidget(QtGui.QLabel('period'), 3, 0),
self.addWidget(self.spinboxes['period'], 3, 1)
self.addWidget(QtGui.QLabel('Scanning'), 4, 0)
self.addWidget(self.scan_button, 4, 1)
self.addWidget(self.scanLabelValue, 5, 0)
self.addWidget(self.scanpBar, 5, 1)
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self.scan_button.clicked.connect(self._scan_button_clicked)
def name(self):
return self.name
@QtCore.pyqtSlot()
def _scan_button_clicked(self):
start = self.spinboxes['start'].value()
stop = self.spinboxes['stop'].value()
period = self.spinboxes['period'].value()
dt = 5.0e-3
first_value = float(self.signal_to_scan_layout.spinboxes[self.name].value())
scan_array = scanFunctions.create_scan_array(start, stop, period, first_value, dt)
scan_array_gen = scanFunctions.yield_scan_array(scan_array)
if first_value > float(stop) or first_value < float(start):
details = 'Remember remember the fifth of November.' + '\n' + 'Also remember that scan starts from the value of the corresponding spin box'
show_warning('Scan can not start outside scan range and scan start should be lower than scan stop', details_text= details)
elif len(scan_array) < 5:
show_warning('%i steps are too few, you need at least 5 steps' % (len(scan_array)) )
elif stop==start:
show_warning('Oh dear, you might be trying to scan from 0 to 0. Plase never do that again.')
else:
self.scanActionSignal.emit(scan_array_gen)
self.scan_button.setText('Stop scan')
self.signal_to_scan_layout.spinboxes[self.name].setEnabled(False)
self.spinboxes['start'].setEnabled(False)
self.spinboxes['stop'].setEnabled(False)
self.spinboxes['period'].setEnabled(False)
self.scan_button.setStyleSheet("background-color: green")
self.scan_button.setText('Scanning')
@QtCore.pyqtSlot(float)
def scan_step(self, val):
self.pBarEvent(val)
@QtCore.pyqtSlot(float)
def scan_end(self, val):
self.signal_to_scan_layout.spinboxes[self.name].setValue(val)
self.scan_button.setText('Start scan')
self.scan_button.setStyleSheet('background-color: None')
self.signal_to_scan_layout.spinboxes[self.name].setEnabled(True)
self.spinboxes['start'].setEnabled(True)
self.spinboxes['stop'].setEnabled(True)
self.spinboxes['period'].setEnabled(True)
def pBarEvent(self, current_step):
start = self.spinboxes['start'].value()
stop = self.spinboxes['stop'].value()
self.scanpBar.setValue( 100 * float(current_step-float(start))/float(stop-start) )
self.scanLabelValue.setText("%.2f" % current_step + ' V')
def freeze(self):
self.scan_button.setEnabled(False)
def unfreeze(self):
self.scan_button.setEnabled(True)
Martin Drechsler
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if __name__ == '__main__':
import sys
from PyQt5.QtWidgets import QMainWindow
sys.path.append("/home/martindrech/Documents/total_control_app")
app = QtGui.QApplication([])
frame = QtGui.QFrame()
area = dockarea.DockArea()
grid = QtGui.QGridLayout()
frame.setLayout(grid)
myDock = dockarea.Dock('397', (100, 100))
area.addDock(myDock)
grid.addWidget(area, 0, 0)
l = LaserControlLayout('397', checkboxes = ['cb1', 'cb2', 'cb3'])
l_scan = LaserScanLayout('397 scan')
myDock.addWidget(l)
myDock.addWidget(l_scan)
frame.show()
sys.exit(app.exec_())