def __init__(self, parent=None):
'''
Constructor
'''
QtGui.QDialog.__init__(self, parent)
self._ui = Ui_ConfigureDialog()
self._ui.setupUi(self)
# Keep track of the previous identifier so that we can track changes
# and know how many occurrences of the current identifier there should
# be.
self._previousIdentifier = ''
# Set a place holder for a callable that will get set from the step.
# We will use this method to decide whether the identifier is unique.
self.identifierOccursCount = None
self._makeConnections()
class ConfigureDialog(QtGui.QDialog):
'''
Configure dialog to present the user with the options to configure this step.
'''
def __init__(self, parent=None):
'''
Constructor
'''
QtGui.QDialog.__init__(self, parent)
self._ui = Ui_ConfigureDialog()
self._ui.setupUi(self)
# Keep track of the previous identifier so that we can track changes
# and know how many occurrences of the current identifier there should
# be.
self._previousIdentifier = ''
# Set a place holder for a callable that will get set from the step.
# We will use this method to decide whether the identifier is unique.
self.identifierOccursCount = None
self._makeConnections()
def _makeConnections(self):
self._ui.lineEdit0.textChanged.connect(self.validate)
def accept(self):
'''
Override the accept method so that we can confirm saving an
invalid configuration.
'''
result = QtGui.QMessageBox.Yes
if not self.validate():
result = QtGui.QMessageBox.warning(self, 'Invalid Configuration',
'This configuration is invalid. Unpredictable behaviour may result if you choose \'Yes\', are you sure you want to save this configuration?)',
QtGui.QMessageBox.Yes | QtGui.QMessageBox.No, QtGui.QMessageBox.No)
if result == QtGui.QMessageBox.Yes:
QtGui.QDialog.accept(self)
def validate(self):
'''
Validate the configuration dialog fields. For any field that is not valid
set the style sheet to the INVALID_STYLE_SHEET. Return the outcome of the
overall validity of the configuration.
'''
# Determine if the current identifier is unique throughout the workflow
# The identifierOccursCount method is part of the interface to the workflow framework.
value = self.identifierOccursCount(self._ui.lineEdit0.text())
valid = (value == 0) or (value == 1 and self._previousIdentifier == self._ui.lineEdit0.text())
if valid:
self._ui.lineEdit0.setStyleSheet(DEFAULT_STYLE_SHEET)
else:
self._ui.lineEdit0.setStyleSheet(INVALID_STYLE_SHEET)
return valid
def getConfig(self):
'''
Get the current value of the configuration from the dialog. Also
set the _previousIdentifier value so that we can check uniqueness of the
identifier over the whole of the workflow.
'''
self._previousIdentifier = self._ui.lineEdit0.text()
config = {}
config['identifier'] = self._ui.lineEdit0.text()
return config
def setConfig(self, config):
'''
Set the current value of the configuration for the dialog. Also
set the _previousIdentifier value so that we can check uniqueness of the
identifier over the whole of the workflow.
'''
self._previousIdentifier = config['identifier']
self._ui.lineEdit0.setText(config['identifier'])