def dropEvent(self, event):
if event.mimeData().hasFormat("image/x-workflow-step"):
pieceData = event.mimeData().data("image/x-workflow-step")
stream = QtCore.QDataStream(pieceData, QtCore.QIODevice.ReadOnly)
hotspot = QtCore.QPoint()
nameLen = stream.readUInt32()
name = stream.readRawData(nameLen).decode(sys.stdout.encoding)
stream >> hotspot
scene = self.scene()
position = self.mapToScene(event.pos() - hotspot)
metastep = MetaStep(workflowStepFactory(name, self._location))
node = Node(metastep)
metastep._step.registerConfiguredObserver(scene.stepConfigured)
metastep._step.registerDoneExecution(scene.doneExecution)
metastep._step.registerOnExecuteEntry(scene.setCurrentWidget)
metastep._step.registerIdentifierOccursCount(scene.identifierOccursCount)
self._undoStack.beginMacro('Add node')
self._undoStack.push(CommandAdd(scene, node))
# Set the position after it has been added to the scene
self._undoStack.push(CommandMove(node, position, scene.ensureItemInScene(node, position)))
scene.clearSelection()
node.setSelected(True)
self._undoStack.endMacro()
self.setFocus()
event.accept()
else:
event.ignore()
def updateModel(self):
'''
Clears the QGraphicScene and re-populates it with what is currently
in the WorkflowScene.
'''
QtGui.QGraphicsScene.clear(self)
meta_steps = {}
connections = []
for workflowitem in self._workflow_scene.items():
if workflowitem.Type == MetaStep.Type:
node = Node(workflowitem)
workflowitem._step.registerConfiguredObserver(self.stepConfigured)
workflowitem._step.registerDoneExecution(self.doneExecution)
workflowitem._step.registerOnExecuteEntry(self.setCurrentWidget, self.setWidgetUndoRedoStack)
workflowitem._step.registerIdentifierOccursCount(self.identifierOccursCount)
# Put the node into the scene straight away so that the items scene will
# be valid when we set the position.
QtGui.QGraphicsScene.addItem(self, node)
node.setPos(workflowitem.pos())
self.blockSignals(True)
node.setSelected(workflowitem.selected())
self.blockSignals(False)
meta_steps[workflowitem] = node
elif workflowitem.Type == Connection.Type:
connections.append(workflowitem)
for connection in connections:
src_port_item = meta_steps[connection.source()]._step_port_items[connection.sourceIndex()]
destination_port_item = meta_steps[connection.destination()]._step_port_items[connection.destinationIndex()]
arc = Arc(src_port_item, destination_port_item)
# Overwrite the connection created in the Arc with the original one that is in the
# WorkflowScene
arc._connection = connection
# Again put the arc into the scene straight away so the scene will be valid
QtGui.QGraphicsScene.addItem(self, arc)
self.blockSignals(True)
arc.setSelected(connection.selected())
self.blockSignals(False)
self._previousSelection = self.selectedItems()
