class MultiWidget(QWidget):
valueModified = pyqtSignal()
valueChosen = pyqtSignal(object)
def __init__(self,
parent,
types,
curvalue,
client,
allow_enter=False,
valinfo=None):
QWidget.__init__(self, parent)
layout = self._layout = QGridLayout()
layout.setContentsMargins(0, 0, 0, 0)
self._widgets = []
if valinfo is not None:
for i, info in enumerate(valinfo):
layout.addWidget(QLabel(info.name), 0, i)
for i, (typ, val) in enumerate(zip(types, curvalue)):
widget = create(self,
typ,
val,
client=client,
allow_enter=allow_enter)
self._widgets.append(widget)
widget.valueModified.connect(self.valueModified)
if allow_enter:
widget.valueChosen.connect(
lambda val: self.valueChosen.emit(self.getValue()))
layout.addWidget(widget, 1, i)
self.setLayout(layout)
def getValue(self):
return tuple(w.getValue() for w in self._widgets)
class SetOfWidget(QWidget):
valueModified = pyqtSignal()
valueChosen = pyqtSignal(object)
def __init__(self, parent, values, curvalue, client):
QWidget.__init__(self, parent)
layout = self._layout = QVBoxLayout()
self.checkboxes = []
self.values = []
curvalue = curvalue or set()
for value in values:
checkbox = QCheckBox(str(value), self)
if value in curvalue:
checkbox.setCheckState(Qt.Checked)
checkbox.stateChanged.connect(self.on_checkbox_stateChanged)
layout.addWidget(checkbox)
self.checkboxes.append(checkbox)
layout.setContentsMargins(0, 0, 0, 0)
self.setLayout(layout)
def on_checkbox_stateChanged(self, state):
self.valueModified.emit()
def getValue(self):
result = set()
for value, checkbox in zip(self.values, self.checkboxes):
if checkbox.isChecked():
result.add(value)
return result
class DictWithWidget(QWidget):
valueModified = pyqtSignal()
valueChosen = pyqtSignal(object)
def __init__(self,
parent,
keys,
types,
curvalue,
client,
allow_enter=False):
QWidget.__init__(self, parent)
layout = self._layout = QFormLayout()
layout.setContentsMargins(0, 0, 0, 0)
self.keys = keys
self._widgets = []
for (key, typ, val) in zip(keys, types, curvalue.values()):
widget = create(self,
typ,
val,
client=client,
allow_enter=allow_enter)
self._widgets.append(widget)
widget.valueModified.connect(self.valueModified)
if allow_enter:
widget.valueChosen.connect(
lambda val: self.valueChosen.emit(self.getValue()))
layout.addRow(key, widget)
self.setLayout(layout)
def getValue(self):
return {k: w.getValue() for k, w in zip(self.keys, self._widgets)}
class PositionTable(QTableWidget):
"""Display all selected measurement positions.
Each value is modifiable and removable.
"""
pointRemove = pyqtSignal(int)
valueChanged = pyqtSignal(int, int, float)
def __init__(self, parent=None):
QTableWidget.__init__(self, parent)
def mousePressEvent(self, event):
if event.button() == Qt.RightButton:
item = self.itemAt(event.pos())
if item:
if QMessageBox.question(self, 'Remove data point', 'Do you '
'really want to remove this data '
'point?') == QMessageBox.Yes:
event.accept()
r = item.row()
self.removeRow(r)
self.pointRemove.emit(r)
QTableWidget.mousePressEvent(self, event)
def clearTable(self):
while self.rowCount():
self.removeRow(0)
self.pointRemove.emit(0)
def getValues(self, row):
return [float(self.item(row, i).text()) for i in range(3)]
class CheckWidget(QWidget):
valueModified = pyqtSignal()
valueChosen = pyqtSignal(object)
def __init__(self, parent, inner, curvalue, client):
QWidget.__init__(self, parent)
layout = self._layout = QHBoxLayout()
self.checkbox = QCheckBox(self)
if curvalue is not None:
self.checkbox.setCheckState(Qt.Checked)
if curvalue is None:
curvalue = inner() # generate a dummy value
self.inner_widget = create(self, inner, curvalue, client=client)
self.inner_widget.setEnabled(self.checkbox.isChecked())
self.inner_widget.valueModified.connect(self.valueModified)
layout.addWidget(self.checkbox)
layout.addWidget(self.inner_widget)
layout.setContentsMargins(0, 0, 0, 0)
self.checkbox.stateChanged.connect(self.on_checkbox_stateChanged)
self.setLayout(layout)
def on_checkbox_stateChanged(self, state):
self.inner_widget.setEnabled(state == Qt.Checked)
self.valueModified.emit()
def getValue(self):
if self.checkbox.isChecked():
return self.inner_widget.getValue()
return None
class DeviceComboWidget(QComboBox):
valueModified = pyqtSignal()
valueChosen = pyqtSignal(object)
def __init__(self,
parent,
curvalue,
client,
needs_class='nicos.core.device.Device',
allow_enter=False):
QComboBox.__init__(self, parent, editable=True)
self.setSizePolicy(
QSizePolicy(QSizePolicy.Expanding, QSizePolicy.Fixed))
if client:
devs = client.getDeviceList(needs_class)
self.addItems(devs)
try:
index = devs.index(curvalue)
self.setCurrentIndex(index)
except ValueError:
self.setEditText(curvalue)
else:
self.setEditText(curvalue)
self.editTextChanged.connect(lambda _: self.valueModified.emit())
if allow_enter:
self.lineEdit().returnPressed.connect(
lambda: self.valueChosen.emit(self.currentText()))
def getValue(self):
return self.currentText()
class OneofdictOrWidget(QWidget):
valueModified = pyqtSignal()
valueChosen = pyqtSignal(object)
def __init__(self, parent, inner, selector, buttons):
QWidget.__init__(self, parent)
self._inner = inner
self._selector = selector
layout = self._layout = QVBoxLayout()
layout.setContentsMargins(0, 0, 0, 0)
inner.valueModified.connect(self.valueModified)
inner.valueChosen.connect(self.valueChosen)
if not buttons:
selector.valueModified.connect(self.on_selector_valueModified)
inner.setVisible(selector.getValue() is Ellipsis)
else:
selector.valueChosen.connect(self.valueChosen)
layout.addWidget(selector)
layout.addWidget(inner)
self.setLayout(layout)
def on_selector_valueModified(self):
val = self._selector.getValue()
self._inner.setVisible(val is Ellipsis)
self.valueModified.emit()
def getValue(self):
val = self._selector.getValue()
if val is Ellipsis:
return self._inner.getValue()
return val
class TableWidget(QTableWidget):
valueModified = pyqtSignal()
valueChosen = pyqtSignal(object)
def __init__(self,
parent,
validator,
curvalue,
fmtstr,
client,
allow_enter=False):
self._rows, self._cols = curvalue.shape
self.validator = validator
QTableWidget.__init__(self, self._rows, self._cols, parent)
for i in range(self._rows):
for j in range(self._cols):
self.setItem(i, j, QTableWidgetItem(fmtstr % curvalue[i, j]))
self.cellChanged.connect(lambda i, j: self.valueModified.emit())
def getValue(self):
value = np.zeros((self._rows, self._cols))
for i in range(self._rows):
for j in range(self._cols):
value[i, j] = self.validator(self.item(i, j).text())
return value
class CacheSignals(QObject):
"""This must be a separate object since the metaclasses of BaseCacheClient
and CacheSignals are not compatible.
"""
connected = pyqtSignal()
disconnected = pyqtSignal()
keyUpdated = pyqtSignal(str, object)
class MissingWidget(QLabel):
valueModified = pyqtSignal()
valueChosen = pyqtSignal(object)
def __init__(self, parent, curvalue, text='editing impossible'):
QLabel.__init__(self, parent)
self.setText('(%s)' % text)
self._value = curvalue
def getValue(self):
return self._value
class ExprWidget(QLineEdit):
valueModified = pyqtSignal()
valueChosen = pyqtSignal(object)
def __init__(self, parent, curvalue, allow_enter=False):
QLineEdit.__init__(self, parent)
self.setText(cache_dump(curvalue))
self.textChanged.connect(lambda txt: self.valueModified.emit())
if allow_enter:
self.returnPressed.connect(
lambda: self.valueChosen.emit(cache_load(self.text())))
def getValue(self):
return cache_load(self.text())
class PnPSetupQuestion(QMessageBox):
"""Special QMessageBox for asking what to do a new setup was detected."""
closed = pyqtSignal('QMessageBox')
def __init__(self, parent, client, data):
self.client = client
client.setup.connect(self.on_client_setup)
self.data = data
add_mode = data[0] == 'added'
if add_mode:
message = (
'<b>New sample environment detected</b><br/>'
'A new sample environment <b>%s</b> has been detected:<br/>%s'
% (data[1], data[2] or ''))
else:
message = (
'<b>Sample environment removed</b><br/>'
'The sample environment <b>%s</b> has been removed:<br/>%s' %
(data[1], data[2] or ''))
QMessageBox.__init__(self, QMessageBox.Information,
'NICOS Plug & Play', message,
QMessageBox.NoButton, parent)
self.setWindowModality(Qt.NonModal)
self.b0 = self.addButton('Ignore', QMessageBox.RejectRole)
self.b0.setIcon(self.style().standardIcon(
QStyle.SP_DialogCancelButton))
if add_mode:
self.b1 = self.addButton('Load setup', QMessageBox.YesRole)
else:
self.b1 = self.addButton('Remove setup', QMessageBox.YesRole)
self.b1.setIcon(self.style().standardIcon(QStyle.SP_DialogOkButton))
self.b0.clicked.connect(self.on_ignore_clicked)
self.b1.clicked.connect(self.on_execute_clicked)
self.b0.setFocus()
def on_ignore_clicked(self):
self.closed.emit(self)
self.reject()
def on_execute_clicked(self):
if self.data[0] == 'added':
self.client.run('AddSetup(%r)' % self.data[1])
else:
self.client.run('RemoveSetup(%r)' % self.data[1])
self.closed.emit(self)
self.accept()
def closeEvent(self, event):
self.closed.emit(self)
return QMessageBox.closeEvent(self, event)
def on_client_setup(self, data):
setupnames = data[0]
if self.data[0] == 'added' and self.data[1] in setupnames:
# somebody loaded the setup!
self.on_ignore_clicked()
elif self.data[0] == 'removed' and self.data[1] not in setupnames:
# somebody unloaded the setup!
self.on_ignore_clicked()
class CustomCombo(QComboBox):
valueChanged = pyqtSignal(int)
def __init__(self, container=None, box_data=None, init_state=None):
QComboBox.__init__(self, parent=container)
self.current = init_state
for item in box_data:
self.addItem('%s' % item)
self.setCurrentIndex(self.current)
self.currentIndexChanged[int].connect(self.index_changed)
@pyqtSlot(int)
def index_changed(self, index):
# self.setDisabled(True)
self.valueChanged[int].emit(index)
def mousePressEvent(self, e):
if e.button() == Qt.RightButton:
if self.parent():
self.parent().mousePressEvent(e)
else:
QComboBox.mousePressEvent(self, e)
def setValue(self, val):
self.current = val
self.setCurrentIndex(self.findText('%s' % val))
self.setEnabled(True)
def value(self):
return self.currentText()
class SetupDepPanelMixin(QObject):
"""Mixin to handle setup-dependent visibility.
Note: You must explicity add the following class attribute in all
classes using this mixin (A PyQt resctriction, see
https://riverbankcomputing.com/pipermail/pyqt/2013-September/033199.html):
`setWidgetVisible = SetupDepPanelMixin.setWidgetVisible`
"""
setupSpec = ()
setWidgetVisible = pyqtSignal(QWidget, bool, name='setWidgetVisible')
def __init__(self, client, options): # pylint: disable=super-init-not-called
setups = options.get('setups', '')
self.setSetups(setups)
client.register(self, 'session/mastersetup')
def setSetups(self, setupSpec):
self.setupSpec = setupSpec
self.log.debug('setups are: %r', self.setupSpec)
checkSetupSpec(self.setupSpec, '', log=self.log)
def on_keyChange(self, key, value, time, expired):
if key == 'session/mastersetup' and self.setupSpec:
if hasattr(self, 'setWidgetVisible'):
enabled = checkSetupSpec(self.setupSpec, value, log=self.log)
self.setWidgetVisible.emit(self, enabled)
class CondCell(CellItem):
standard_value = 'TrueTime'
conds = ('LiveTime', 'TrueTime', 'ClockTime', 'counts')
condChanged = pyqtSignal(str)
def __init__(self, controller, parent=None, state=None):
CellItem.__init__(self, controller, parent, state)
index = int(self.conds.index(self.state))
self.cc = CustomCombo(container=self,
box_data=self.conds,
init_state=index)
self.cc.valueChanged[int].connect(self.on_cb_changed)
self.widgets.append(self.cc)
self.set_layout()
self.setMaximumWidth(100)
def setValue(self, new_data):
if new_data in CondCell.conds:
self.cc.setValue(new_data)
self.state = new_data
self.condChanged.emit(new_data)
def value(self):
return self.cc.currentText()
@pyqtSlot(int)
def on_cb_changed(self, index):
self.cellChanged.emit(self)
self.condChanged.emit(self.value())
class CustomLED(ClickableOutputLed):
"""Just views to what state the Attenuator should/will be set."""
valueChanged = pyqtSignal(int)
def __init__(self,
container,
state_names=('in', 'out'),
state_colors=('blue', 'yellow'),
initState=None):
ClickableOutputLed.__init__(self, parent=container)
self.stateActive = state_names[0]
self.stateInactive = state_names[1]
self._colorActive = state_colors[0]
self._colorInactive = state_colors[1]
self.current = initState
self.set_ledcolor()
def set_ledcolor(self):
self.ledColor = self._colorActive \
if self.current == self._stateActive else self._colorInactive
def setValue(self, val):
self.current = val
self.set_ledcolor()
def value(self):
return self.current
def mousePressEvent(self, event):
if event.button() == Qt.LeftButton:
self.setValue(self._stateInactive if self.current ==
self._stateActive else self._stateActive)
self.valueChanged[int].emit(self.current)
event.accept()
class MultiEntry(QWidget):
addOrRemove = pyqtSignal()
def __init__(self, parent, client, uifile):
QWidget.__init__(self, parent)
new_layout = QHBoxLayout()
self.subwidget = QWidget(self)
if uifile:
uic.loadUi(uifile, self.subwidget)
self.button = QToolButton(self)
self.setButton('+')
self.button.clicked.connect(self.on_button_click)
new_layout.addWidget(self.subwidget)
new_layout.addSpacerItem(QSpacerItem(15, 1, QSizePolicy.Fixed))
new_layout.addWidget(self.button)
new_layout.setContentsMargins(0, 0, 0, 0)
self.setLayout(new_layout)
for ch in self.subwidget.findChildren(NicosWidget):
ch.setClient(client)
def setButton(self, plusminus):
self.button.setText(plusminus)
if plusminus == '+':
self.button.setToolTip('Add another')
else:
self.button.setToolTip('Remove this')
def on_button_click(self):
self.addOrRemove.emit()
class CellItem(QWidget):
standard_value = ''
cellChanged = pyqtSignal('QWidget')
def __init__(self, controller, parent=None, state=None):
QWidget.__init__(self, parent)
# update Request for parameter gets sent to controller
self.controller = controller
# contains widgets that are currently displayed
self.widgets = []
self.state = state if state is not None else self.standard_value
self.doubleclick = None
# setting up layout:
layout = QHBoxLayout()
layout.setContentsMargins(0.1, 0.1, 0.1, 0.1)
layout.setSpacing(1)
self.setLayout(layout)
def set_enabled(self, enabled):
for widget in self.widgets:
widget.setEnabled(enabled)
# some
self.reloadstate()
def reloadstate(self):
pass
def is_enabled(self):
return max(w.isEnabled() for w in self.widgets)
def set_layout(self):
for w in self.widgets:
self.layout().addWidget(w)
def setValue(self, val):
self.label.setText('%s' % val)
def value(self):
return self.label.text()
def disable(self):
for w in self.widgets:
w.setDisabled(True)
def mouseDoubleClickEvent(self, e):
for w in self.widgets:
w.setEnabled(True)
if self.doubleclick is not None:
self.doubleclick = True
e.ignore()
class AnnotatedWidget(QWidget):
valueModified = pyqtSignal()
valueChosen = pyqtSignal(object)
def __init__(self, parent, inner, annotation):
QWidget.__init__(self, parent)
layout = self._layout = QHBoxLayout()
layout.setContentsMargins(0, 0, 0, 0)
self._inner = inner
self._inner.valueModified.connect(self.valueModified)
self._inner.valueChosen.connect(self.valueChosen)
layout.addWidget(inner)
layout.addWidget(QLabel(annotation, parent))
self.setLayout(layout)
def getValue(self):
return self._inner.getValue()
def setFocus(self):
self._inner.setFocus()
class SpinBoxWidget(QSpinBox):
valueModified = pyqtSignal()
valueChosen = pyqtSignal(object)
def __init__(self,
parent,
curvalue,
minmax,
fmtstr='%.4g',
allow_enter=False):
QSpinBox.__init__(self, parent)
self.setRange(minmax[0], minmax[1])
self.setValue(curvalue)
self.valueChanged['int'].connect(lambda val: self.valueModified.emit())
if allow_enter:
self.lineEdit().returnPressed.connect(
lambda: self.valueChosen.emit(self.value()))
def getValue(self):
return self.value()
class ButtonWidget(QWidget):
valueModified = pyqtSignal()
valueChosen = pyqtSignal(object)
def __init__(self, parent, values):
QWidget.__init__(self, parent)
layout = QHBoxLayout()
layout.setContentsMargins(0, 0, 0, 0)
self._values = {}
for value in values:
btn = QPushButton(str(value), self)
self._values[btn] = value
btn.clicked.connect(self.on_button_pressed)
layout.addWidget(btn)
self.setLayout(layout)
def on_button_pressed(self):
self.valueChosen.emit(self._values[self.sender()])
def getValue(self):
return Ellipsis
class EditWidget(QLineEdit):
valueModified = pyqtSignal()
valueChosen = pyqtSignal(object)
def __init__(self,
parent,
typ,
curvalue,
fmtstr='%.4g',
minmax=None,
allow_enter=False):
QLineEdit.__init__(self, parent)
self._typ = typ
if typ is float:
val = DoubleValidator(self)
if minmax:
# setRange doesn't work correctly in some Qt versions...
val.setBottom(minmax[0])
if minmax[1] is not None:
val.setTop(minmax[1])
self.setValidator(val)
self.setText(fmtstr % curvalue)
elif typ is int:
val = QIntValidator(self)
if minmax:
val.setRange(minmax[0], minmax[1])
self.setValidator(val)
self.setText(str(curvalue))
else:
self.setText(str(curvalue))
self.textChanged.connect(lambda txt: self.valueModified.emit())
if allow_enter:
self.returnPressed.connect(
lambda: self.valueChosen.emit(self._typ(self.text())))
def getValue(self):
return self._typ(self.text())
class LiveWidget(DefaultLiveWidget):
"""
Add a 'name' attribute to LiveWidget and emit 'clicked' signal when clicked
"""
clicked = pyqtSignal(str)
def __init__(self, name, parent=None):
DefaultLiveWidget.__init__(self, parent)
self.setMinimumSize(150, 150)
self.name = name
def mousePressEvent(self, event):
self.clicked.emit(self.name)
class DeviceParam(QWidget):
editedParam = pyqtSignal()
clickedRemoveButton = pyqtSignal(str)
def __init__(self, param, valueWidget, isUnknownValue=False, parent=None):
QWidget.__init__(self, parent)
uic.loadUi(
path.abspath(
path.join(path.dirname(__file__), 'ui', 'deviceparam.ui')),
self)
self.placeholder.setVisible(False)
self.param = param
self.valueWidget = valueWidget
self.isUnknownValue = isUnknownValue
self.pushButtonRemove.clicked.connect(
lambda: self.clickedRemoveButton.emit(self.param))
self.labelParam.setText(self.param + ':')
self.horizontalLayout.addWidget(self.valueWidget)
self.valueWidget.valueModified.connect(self.editedParam)
self.valueWidget.valueChosen.connect(lambda _: self.editedParam.emit())
def getValue(self):
return self.valueWidget.getValue()
class ComboWidget(QComboBox):
valueModified = pyqtSignal()
valueChosen = pyqtSignal(object)
def __init__(self, parent, values, curvalue, add_other=False):
QComboBox.__init__(self, parent)
self._values = sorted(values, key=str)
self._textvals = list(map(str, self._values))
self._add_other = add_other
if add_other:
self._values.append(Ellipsis)
self._textvals.append('<other value>')
self.addItems(self._textvals)
if curvalue in self._values:
self.setCurrentIndex(self._values.index(curvalue))
elif add_other:
self.setCurrentIndex(len(self._values) - 1)
self.currentIndexChanged['int'].connect(
lambda idx: self.valueModified.emit())
def getValue(self):
return self._values[self._textvals.index(self.currentText())]
class MeasElement(QObject):
"""Represents one setting for a measurement that can be manipulated."""
LABEL = ''
ORDER = 1
changed = pyqtSignal(object)
def __init__(self, eltype, client, value=None, extra=None):
"""Initialize widget contents, if necessary."""
QObject.__init__(self)
self.eltype = eltype
self.value = value
self.extra = extra
self._widget = None
self.clientUpdate(client)
def getLabel(self):
"""Return label for the element."""
if self.LABEL:
return self.LABEL
return self.eltype.capitalize()
def clientUpdate(self, client):
"""Update internal info from daemon."""
def createWidget(self, parent, client):
"""Create and return a Qt widget for editing this element."""
def destroyWidget(self):
"""Destroy the currently created widget."""
if self._widget:
self._widget.deleteLater()
self._widget = None
def getValue(self):
"""Return currently selected value."""
return self.value
def getDispValue(self):
"""Return a form of the value to be displayed."""
return str(self.getValue())
def otherChanged(self, eltype, value):
"""Hook to be called when a sibling element changed."""
class DetachedWindow(QMainWindow):
closed = pyqtSignal(object)
def __init__(self, title, parent):
self.tabIdx = -1
QMainWindow.__init__(self, parent)
self.setWindowTitle(title)
self.setWindowModality(Qt.NonModal)
self.sgroup = SettingGroup(title)
with self.sgroup as settings:
loadBasicWindowSettings(self, settings)
@pyqtSlot(QWidget, bool)
def setWidgetVisibleSlot(self, widget, visible):
self.setVisible(visible)
def setWidget(self, widget):
self.setCentralWidget(widget)
widget.show()
def closeEvent(self, event):
with self.sgroup as settings:
settings.setValue('detached', False)
self.closed.emit(self)
self.deleteLater()
def moveEvent(self, event):
QMainWindow.moveEvent(self, event)
self.saveSettings()
def resizeEvent(self, event):
QMainWindow.resizeEvent(self, event)
self.saveSettings()
def saveSettings(self, detached=True):
with self.sgroup as settings:
settings.setValue('detached', detached)
settings.setValue('geometry', self.saveGeometry())
settings.setValue('windowstate', self.saveState())
class StandaloneHistoryWindow(DlgUtils, BaseHistoryWindow, QMainWindow):
newValue = pyqtSignal(object)
def __init__(self, app):
QMainWindow.__init__(self, None)
self.app = app
self.client = app # used by the NewViewDialog
# this is done in Panel.__init__ for the panel version
self.settings = CompatSettings()
self.loadSettings(self.settings)
BaseHistoryWindow.__init__(self)
self.splitter.setSizes([20, 80])
DlgUtils.__init__(self, 'History viewer')
self.actionAttachElog.setVisible(False)
self.splitter.restoreState(self.splitterstate)
self.setCentralWidget(self.splitter)
self.newValue.connect(self.newvalue_callback)
for toolbar in self.getToolbars():
self.addToolBar(toolbar)
for menu in self.getMenus():
self.menuBar().addMenu(menu)
self.actionFitLinear.trigger()
self.statusBar = QStatusBar(self)
self.setStatusBar(self.statusBar)
def gethistory_callback(self, key, fromtime, totime):
return self.app.history(None, key, fromtime, totime)
def closeEvent(self, event):
self.saveSettings(self.settings)
return QMainWindow.closeEvent(self, event)
class TimelineWidget(QGraphicsView):
"""General widget to display timeline with a list of ordered timepoints.
A timepoint is selectable via click and the timepointSelected signal
can be used to react to it."""
timepointSelected = pyqtSignal(object) # datetime.datetime object
# general layout and design parameters
TIMEPOINT_DIAMETER = 30
SELECTION_DIAMETER = 40
TIMEPOINT_SPACING = 50
TIMELINE_WIDTH = 5
LABEL_SPACING = 20
MARGIN_HORIZONTAL = 5
STRFTIME_FMT = '%H:%M:%S\n%Y-%m-%d'
def __init__(self, parent=None):
QGraphicsView.__init__(self, QGraphicsScene(), parent)
self.setAlignment(Qt.AlignLeft | Qt.AlignVCenter)
self.setRenderHints(QPainter.Antialiasing
| QPainter.SmoothPixmapTransform)
# margins set to 0 to simplify calculations
self.setContentsMargins(0, 0, 0, 0)
self.setViewportMargins(0, 0, 0, 0)
# full viewport updates required to avoid optical double selections
# caused by scrolling
self.setViewportUpdateMode(QGraphicsView.FullViewportUpdate)
self._time_points = []
self._time_point_items = {}
self._selection_item = None
# start with at least one time point (current time) to be able
# to reuse size calculation methods for the inital size
self.setTimePoints([datetime.now()])
@property
def time_points(self):
"""Sorted list of all timepoints (sorted new to old)"""
return self._time_points
@property
def selected_time_point(self):
"""Get the selected timeout as datetime object. None if there is no
selection."""
if self._selection_item is None:
return None
return self._time_point_items[self._selection_item]
@property
def previous_time_point(self):
"""Get the timepoint before (older than) the currently selected one as
datetime object. None if there is no selection"""
try:
index = self._time_points.index(self.selected_time_point)
return self._time_points[index + 1]
except (ValueError, IndexError):
return None
def resizeEvent(self, event):
"""Clear and readd all items on resize. Avoids complex scaling."""
self.scene().clear()
self.setTimePoints(self._time_points)
def setTimePoints(self, time_points):
"""Sets and list of datetime objects as timepoints, sets up all
necessary graphics items and adjusts sizes."""
self.scene().clear()
self._selection_item = None
# store the timepoints sorted from new to old
self._time_points = list(reversed(sorted(time_points)))
self._time_point_items = {}
# draw the timeline
self._timeline = self._add_timeline()
# draw the time points
self._add_time_points()
# update the scene size and a slightly larger widget size to avoid
# superfluous scrolling (and displaying of scroll bars)
size = self.scene().itemsBoundingRect().size()
self.setSceneRect(0, 0, size.width(), size.height() - 5)
if time_points:
self.setMinimumWidth(size.width() * 1.2)
self.setMaximumWidth(size.width() * 1.2)
def mousePressEvent(self, event):
"""Handle mouse press events to support item selection."""
item = self.itemAt(event.pos())
if item in self._time_point_items:
self._select_item(item)
return QGraphicsView.mousePressEvent(self, event)
def _select_item(self, item):
"""Select the given item by drawing a colored circle beneath the
selected item (so it looks like a ring around it.
Also emits the timepointSelected signal."""
# The selection_item used to signal the selection of a timepoint
# is always the same and is only moved.
if self._selection_item is None:
self._selection_item = QGraphicsEllipseItem(
0, 0, self.SELECTION_DIAMETER, self.SELECTION_DIAMETER)
# The used color is a cubical to the time point color
self._selection_item.setBrush(QBrush(QColor(0x70, 0xbb, 0x00)))
self._selection_item.setPen(QPen(0))
self.scene().addItem(self._selection_item)
# center position of the timepoint circle
center_x = item.pos().x() + self.TIMEPOINT_DIAMETER / 2
center_y = item.pos().y() + self.TIMEPOINT_DIAMETER / 2
# move selection item
self._selection_item.setPos(center_x - self.SELECTION_DIAMETER / 2,
center_y - self.SELECTION_DIAMETER / 2)
# store the selection_item like a timepoint item (using the timepoint
# of the selected item)
self._time_point_items[self._selection_item] = \
self._time_point_items[item]
# emit signal at the end to ensure a valid internal state before
# anything can react to it
self.timepointSelected.emit(self._time_point_items[item])
def _add_timeline(self):
"""Draw the timeline."""
# height is either the necessary space to display all items or the
# maximal available display size, so it's looks nicely in larger
# windows and enables scrolling in smaller ones.
height = self.TIMEPOINT_DIAMETER * len(self._time_points)
height += self.TIMEPOINT_SPACING * len(self._time_points)
height = max(height, self.viewport().height())
# draw the timeline left aligned with enough space to draw the items
# and the selection ring.
x = self.MARGIN_HORIZONTAL + (self.SELECTION_DIAMETER / 2)
# position the line on the left side of the item
item = QGraphicsLineItem(0, 0, 0, height)
# The used color for the timeline is the lightest one of the FRM II
# colors
item.setPen(QPen(QBrush(QColor(0xa3, 0xc1, 0xe7)),
self.TIMELINE_WIDTH))
self.scene().addItem(item)
# move the whole item to the desired timeline position
item.setPos(x, 0)
return item
def _add_time_points(self):
"""Add all time point items."""
if not self._time_points:
return
timeline_pos = self._timeline.pos()
timeline_size = self._timeline.boundingRect().size()
height = timeline_size.height()
# time points are always equally distributed on the timeline
spacing = height / float(len(self._time_points))
center_x = timeline_pos.x()
# add half of the items spacing on the top and bottom of the timeline
start = timeline_pos.y() - spacing / 2
for i, entry in enumerate(self._time_points):
self._add_time_point(center_x, start + spacing * (i + 1), entry)
def _add_time_point(self, center_x, center_y, time_point):
"""Add a single time point item."""
x = center_x - (self.TIMEPOINT_DIAMETER / 2)
y = center_y - (self.TIMEPOINT_DIAMETER / 2)
# Create the acutal time point item
time_point_item = QGraphicsEllipseItem(0, 0, self.TIMEPOINT_DIAMETER,
self.TIMEPOINT_DIAMETER)
# The used color is the strongest one of the FRM II colors.
time_point_item.setBrush(QBrush(QColor(0x00, 0x71, 0xbb)))
time_point_item.setPen(QPen(0))
self.scene().addItem(time_point_item)
time_point_item.setPos(x, y)
# place the time point item above the timeline and the selection item
time_point_item.setZValue(2)
# Create the label of the time point showing the time in the
# defined strftime format on the right side of the time point item.
label = QGraphicsTextItem(time_point.strftime(self.STRFTIME_FMT))
label.setFont(QFont('Monospace'))
label_height = label.boundingRect().height()
# minor height adjustment
label_y = y - label_height / 6
self.scene().addItem(label)
label.setPos(x + self.SELECTION_DIAMETER + self.LABEL_SPACING, label_y)
# store references to the item and the timepoint in the same dict
# to be able to use it for forward and reverse lookup
self._time_point_items[time_point] = time_point_item
self._time_point_items[time_point_item] = time_point
class Cmdlet(QWidget):
name = ''
category = ''
cmdletUp = pyqtSignal()
cmdletDown = pyqtSignal()
cmdletRemove = pyqtSignal()
valueModified = pyqtSignal()
def __init__(self, parent, client, uifile):
self.client = client
QWidget.__init__(self, parent)
loadUi(self, uifile)
loadUi(self.buttons, 'cmdlets/buttons.ui')
self.buttons.upBtn.clicked.connect(self.cmdletUp)
self.buttons.downBtn.clicked.connect(self.cmdletDown)
self.buttons.delBtn.clicked.connect(self.cmdletRemove)
def removeSelf(self):
self.parent().layout().removeWidget(self)
self.hide()
def changed(self, *args):
"""Should be called whenever any value in the cmdlet changes."""
self.valueModified.emit()
def getValues(self):
"""Return a dict with the values of the cmdlet.
Values should have a name that is the same for the same logical
value in multiple cmdlets, e.g. "dev" for the device in a command.
"""
return {}
def _getDeviceList(self, special_clause=''):
"""Helper for getting a list of devices for manipulation."""
exp = getattr(self.parent(), 'expertmode', False)
if exp:
clause = special_clause
else:
clause = ('(dn in session.explicit_devices or '
'("nicos.core.mixins.AutoDevice" in d.classes and '
'dn.split(".")[0] in session.explicit_devices))')
if special_clause:
clause += ' and ' + special_clause
# special construction to get AutoDevices like slit.centerx which is
# useful to make scans over
return self.client.getDeviceList('nicos.core.device.Moveable',
only_explicit=False,
special_clause=clause)
def _getDeviceRepr(self, devname):
"""Return bare ``dev`` if the device is in the NICOS user namespace,
else ``'dev'`` in quotes.
"""
if self.client.eval(devname, None) is None:
return srepr(devname)
return devname
def _setDevice(self, values):
"""Helper for setValues for setting a device combo box."""
if 'dev' in values:
idx = self.device.findText(values['dev'])
if idx > -1:
self.device.setCurrentIndex(idx)
def setValues(self, values):
"""Set values of the cmdlet with values from the argument.
Unknown values must be ignored.
"""
def markValid(self, ctl, condition):
"""Return boolean condition, and also mark the offending widget.
For use in isValid().
"""
if condition:
setBackgroundColor(ctl, Qt.white)
else:
setBackgroundColor(ctl, invalid)
if isinstance(ctl, QAbstractSpinBox):
# also mark the inner line-edit
return self.markValid(ctl.lineEdit(), condition)
return condition
def isValid(self):
"""Check if all entered data is valid.
This method can change widget styles to indicate invalid data with
the markValid() method if wanted.
"""
return True
def generate(self, mode):
"""Generate code for the commandlet.
*mode* is 'python' or 'simple'.
Should generate a string of lines, complete with newlines.
"""
return ''
