def perform_operation(expression, controller=None):
"""Perform a variable operation from the given string.
"""
# First, parse the expressions
target, expr_tree = parse_expression(expression)
# Find the actual operations & variables
controller, root_version, output_module_id = (
Variable._get_variables_root(controller))
vistraildata = VistrailManager(controller)
if vistraildata.get_variable(target) is not None:
raise InvalidOperation("Target variable %r already exists" % target)
op_tree = resolve_symbols(vistraildata, expr_tree)
# Build the new variable
variable = op_tree.execute(controller)
vistraildata.new_variable(target, variable)
def perform_operation(expression, controller=None):
"""Perform a variable operation from the given string.
"""
# First, parse the expressions
target, expr_tree = parse_expression(expression)
# Find the actual operations & variables
controller, root_version, output_module_id = (
Variable._get_variables_root(controller))
vistraildata = VistrailManager(controller)
if vistraildata.get_variable(target) is not None:
raise InvalidOperation("Target variable %r already exists" % target)
op_tree = resolve_symbols(vistraildata, expr_tree)
# Build the new variable
variable = op_tree.execute(controller)
vistraildata.new_variable(target, variable)
def test_pipeline_creation(self):
import dat.tests.pkg_test_plots.init as pkg_test_plots
controller = self.vt_controller()
vistraildata = VistrailManager(controller)
loader = Test_generation._loaders.get('StrMaker')
loader.v = 'Hello'
vistraildata.new_variable('var1', loader.load())
loader.v = 'world'
vistraildata.new_variable('var2', loader.load())
cellInfo = FakeObj(
row=0,
column=0,
tab=FakeObj(tabWidget=FakeObj(tabText=lambda w: 'Sheet 1')))
recipe = DATRecipe(
pkg_test_plots.concat_plot, {
'param1': (RecipeParameterValue(
variable=vistraildata.get_variable('var1')), ),
'param2': (RecipeParameterValue(
variable=vistraildata.get_variable('var2')), ),
'param3': (RecipeParameterValue(constant="!"), ),
})
pipelineInfo = vistrails_interface.create_pipeline(
controller, recipe, cellInfo.row, cellInfo.column,
None) # This plot has no cell module so this is fine
controller.change_selected_version(pipelineInfo.version)
result = CallRecorder()
pkg_test_plots.Recorder.callback = result
interpreter = get_default_interpreter()
interpreter.execute(controller.current_pipeline,
view=DummyView(),
locator=controller.locator,
current_version=pipelineInfo.version)
call = (['Hello, world!'], dict())
self.assertEqual(result.calls, [call])
class OperationWizard(QtGui.QDialog):
"""Base class of the operation wizards.
This class offers the basic behavior and functionalities needed by an
operation wizard. It can be subclassed in VisTrails packages to add wizards
to operations.
A wizard is a dialog that is opened by clicking on the relevant icon to the
right of an operation name. It then shows a graphical UI intended to do a
variable operation graphically. When the user accepts, the wizard returns
the new variable or operation string to DAT.
"""
VAR_HIDE = 0
VAR_SELECT = 1
VAR_DRAG = 2
def __init__(self, parent, variables=VAR_HIDE):
"""Setups the widget.
If variables is not VAR_HIDE, a list of the variables will be displayed
on the right. You can override variable_filter to choose which
variables are to be displayed.
If VAR_SELECT is used, variable_selected(variable) will be called when
the selection changes.
"""
_ = translate(OperationWizard)
QtGui.QDialog.__init__(self, parent, QtCore.Qt.Dialog)
self._vistraildata = VistrailManager()
self._selected_varname = None
self._has_error = False
var_right_layout = QtGui.QHBoxLayout()
vlayout = QtGui.QVBoxLayout()
self._validator = VariableNameValidator(VistrailManager())
varname_layout = QtGui.QHBoxLayout()
varname_layout.addWidget(QtGui.QLabel(_("Variable name:")))
self._varname_edit = AdvancedLineEdit(
DEFAULT_VARIABLE_NAME,
default=DEFAULT_VARIABLE_NAME,
validate=self._validator,
flags=(AdvancedLineEdit.COLOR_VALIDITY |
AdvancedLineEdit.COLOR_DEFAULTVALUE |
AdvancedLineEdit.FOLLOW_DEFAULT_UPDATE))
varname_layout.addWidget(self._varname_edit)
vlayout.addStretch()
vlayout.addLayout(varname_layout)
# Create this wizard's specific layout
app_layout = self.create_ui()
assert app_layout is not None
vlayout.insertLayout(0, app_layout)
var_right_layout.addLayout(vlayout)
# Optionally, put a list of variables on the right
if variables != self.VAR_HIDE:
self._variable_list = DraggableListWidget(
mimetype=MIMETYPE_DAT_VARIABLE)
self._variable_list.setSizePolicy(
QtGui.QSizePolicy.Minimum,
self._variable_list.sizePolicy().horizontalPolicy())
for varname in self._vistraildata.variables:
if not self.variable_filter(
self._vistraildata.get_variable(varname)):
continue
pos = bisect(
self._variable_list.count(),
lambda i: str(self._variable_list.item(i).text()),
varname)
self._variable_list.insertItem(pos, varname)
var_right_layout.addWidget(self._variable_list)
if variables == self.VAR_SELECT:
self._variable_list.setDragEnabled(False)
self._variable_list.setSelectionMode(
QtGui.QAbstractItemView.SingleSelection)
self.connect(
self._variable_list,
QtCore.SIGNAL('itemSelectionChanged()'),
self._selection_changed)
main_layout = QtGui.QVBoxLayout()
main_layout.addLayout(var_right_layout)
self._error_label = QtGui.QLabel()
font = self._error_label.font()
font.setBold(True)
self._error_label.setFont(font)
self._error_label.setStyleSheet('color: red;')
main_layout.addWidget(self._error_label)
buttons = QtGui.QDialogButtonBox(
QtGui.QDialogButtonBox.Ok | QtGui.QDialogButtonBox.Cancel,
QtCore.Qt.Horizontal)
self.connect(buttons, QtCore.SIGNAL('accepted()'),
self._accept)
self.connect(buttons, QtCore.SIGNAL('rejected()'),
self, QtCore.SLOT('reject()'))
main_layout.addWidget(buttons)
self.setLayout(main_layout)
def _selection_changed(self):
items = self._variable_list.selectedItems()
if len(items) == 1:
item = items[0]
sel = str(item.text())
if sel != self._selected_varname:
self._selected_varname = sel
self.variable_selected(self._vistraildata.get_variable(sel))
def _accept(self):
if self._has_error:
return
if not self._varname_edit.isValid():
self._varname_edit.setFocus(QtCore.Qt.OtherFocusReason)
return
varname = str(self._varname_edit.text())
result = self.make_operation(varname)
if isinstance(result, Variable):
# Operation was performed by make_operation()
self._vistraildata.new_variable(varname, result)
self.command = None
self.accept()
elif result is False:
# Don't dismiss the dialog
pass
elif isinstance(result, basestring):
# make_operation() gave us an expression to execute
if '=' in result:
self.command = result
else:
self.command = '%s = %s' % (varname, result)
self.accept()
elif (isinstance(result, tuple) and len(result) == 2 and
isinstance(result[0], basestring) and
isinstance(result[1], dict)):
subworkflow, args = result
# TODO : Use args from dictionary + 'variable'
# self.get_variable_argument() to make the result
raise NotImplementedError("Building the operation result from a "
"subworkflow is not yet implemented")
else:
raise TypeError("make_operation returned an unexpected type")
def get_variable_argument(self):
variable_info = self._vistraildata.get_variable(self._selected_varname)
variable = Variable.from_workflow(variable_info,
record_materialized=False)
return ArgumentWrapper(variable)
def set_error(self, err):
if err is None:
self._error_label.hide()
self._has_error = False
else:
if isinstance(err, BaseException):
err = "%s: %s" % (err.__class__.__name__, err.message)
self._error_label.setText(err)
self._error_label.show()
self._has_error = True
def variable_filter(self, variable):
return True
def variable_selected(self, varname):
pass
def make_operation(self, target_var_name):
raise NotImplementedError
