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import logging |
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from copy import copy |
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from PyQt5.QtCore import pyqtSignal, QObject, QSettings, Qt |
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from PyQt5.QtGui import QStandardItemModel, QStandardItem |
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from PyQt5.QtWidgets import QMenu, QAction, QStyledItemDelegate, QAbstractItemView |
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from opcua import ua, Node |
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from uawidgets.utils import trycatchslot |
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from uawidgets.get_node_dialog import GetNodeTextButton |
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logger = logging.getLogger(__name__) |
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class RefsWidget(QObject): |
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error = pyqtSignal(Exception) |
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reference_changed = pyqtSignal(Node) |
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def __init__(self, view): |
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self.view = view |
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QObject.__init__(self, view) |
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self.model = QStandardItemModel() |
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delegate = MyDelegate(self.view, self) |
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delegate.error.connect(self.error.emit) |
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delegate.reference_changed.connect(self.reference_changed.emit) |
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self.view.setEditTriggers(QAbstractItemView.DoubleClicked) |
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self.view.setModel(self.model) |
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self.view.setItemDelegate(delegate) |
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self.settings = QSettings() |
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self.model.setHorizontalHeaderLabels(['ReferenceType', 'NodeId', "BrowseName", "TypeDefinition"]) |
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state = self.settings.value("WindowState/refs_widget_state", None) |
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if state is not None: |
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self.view.horizontalHeader().restoreState(state) |
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self.view.horizontalHeader().setSectionResizeMode(0) |
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self.view.horizontalHeader().setStretchLastSection(True) |
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self.node = None |
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self.reloadAction = QAction("Reload", self.model) |
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self.reloadAction.triggered.connect(self.reload) |
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self.addRefAction = QAction("Add Reference", self.model) |
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self.addRefAction.triggered.connect(self.add_ref) |
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self.removeRefAction = QAction("Remove Reference", self.model) |
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self.removeRefAction.triggered.connect(self.remove_ref) |
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self.view.setContextMenuPolicy(Qt.CustomContextMenu) |
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self.view.customContextMenuRequested.connect(self.showContextMenu) |
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self._contextMenu = QMenu() |
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self._contextMenu.addAction(self.reloadAction) |
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self._contextMenu.addSeparator() |
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self._contextMenu.addAction(self.addRefAction) |
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self._contextMenu.addAction(self.removeRefAction) |
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def showContextMenu(self, position): |
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if not self.node: |
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return |
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self.removeRefAction.setEnabled(False) |
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idx = self.view.currentIndex() |
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if idx.isValid(): |
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self.removeRefAction.setEnabled(True) |
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self._contextMenu.exec_(self.view.viewport().mapToGlobal(position)) |
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def clear(self): |
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# remove all rows but not header!! |
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self.model.removeRows(0, self.model.rowCount()) |
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self.node = None |
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def _make_default_ref(self): |
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#FIXME: remeber last choosen values or use values that make sense |
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ref = ua.ReferenceDescription() |
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return ref |
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@trycatchslot |
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def add_ref(self): |
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ref = self._make_default_ref() |
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logger.info("Adding ref: %s", ref) |
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self._add_ref_row(ref) |
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idx = self.model.index(self.model.rowCount() - 1, 0) |
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self.view.setCurrentIndex(idx) |
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#self.view.edit(idx) |
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@trycatchslot |
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def reload(self): |
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node = self.node |
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self.clear() |
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self.show_refs(node) |
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@trycatchslot |
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def remove_ref(self): |
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idx = self.view.currentIndex() |
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if not idx.isValid(): |
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logger.warning("No valid reference selected to remove") |
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idx = idx.sibling(idx.row(), 0) |
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item = self.model.itemFromIndex(idx) |
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ref = item.data(Qt.UserRole) |
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self.do_remove_ref(ref) |
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self.reload() |
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def do_remove_ref(self, ref, check=True): |
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logger.info("Removing: %s", ref) |
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it = ua.DeleteReferencesItem() |
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it.SourceNodeId = self.node.nodeid |
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it.ReferenceTypeId = ref.ReferenceTypeId |
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it.IsForward = ref.IsForward |
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it.TargetNodeId = ref.NodeId |
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it.DeleteBidirectional = False |
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#param = ua.DeleteReferencesParameters() |
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#param.ReferencesToDelete.append(it) |
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results = self.node.server.delete_references([it]) |
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logger.info("Remove result: %s", results[0]) |
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if check: |
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results[0].check() |
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def save_state(self): |
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self.settings.setValue("WindowState/refs_widget_state", self.view.horizontalHeader().saveState()) |
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def show_refs(self, node): |
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self.clear() |
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self.node = node |
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self._show_refs(node) |
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def _show_refs(self, node): |
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try: |
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refs = node.get_children_descriptions(refs=ua.ObjectIds.References) |
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except Exception as ex: |
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self.error.emit(ex) |
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raise |
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for ref in refs: |
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self._add_ref_row(ref) |
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def _add_ref_row(self, ref): |
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if ref.ReferenceTypeId.Identifier in ua.ObjectIdNames: |
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typename = ua.ObjectIdNames[ref.ReferenceTypeId.Identifier] |
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else: |
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typename = str(ref.ReferenceTypeId) |
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if ref.NodeId.NamespaceIndex == 0 and ref.NodeId.Identifier in ua.ObjectIdNames: |
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nodeid = ua.ObjectIdNames[ref.NodeId.Identifier] |
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else: |
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nodeid = ref.NodeId.to_string() |
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if ref.TypeDefinition.Identifier in ua.ObjectIdNames: |
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typedef = ua.ObjectIdNames[ref.TypeDefinition.Identifier] |
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else: |
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typedef = ref.TypeDefinition.to_string() |
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titem = QStandardItem(typename) |
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titem.setData(ref, Qt.UserRole) |
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self.model.appendRow([ |
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titem, |
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QStandardItem(nodeid), |
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QStandardItem(ref.BrowseName.to_string()), |
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QStandardItem(typedef) |
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]) |
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class MyDelegate(QStyledItemDelegate): |
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error = pyqtSignal(Exception) |
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reference_changed = pyqtSignal(Node) |
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def __init__(self, parent, widget): |
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QStyledItemDelegate.__init__(self, parent) |
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self._widget = widget |
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@trycatchslot |
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def createEditor(self, parent, option, idx): |
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if idx.column() > 1: |
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return None |
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data_idx = idx.sibling(idx.row(), 0) |
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item = self._widget.model.itemFromIndex(data_idx) |
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ref = item.data(Qt.UserRole) |
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if idx.column() == 1: |
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node = Node(self._widget.node.server, ref.NodeId) |
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startnode = Node(self._widget.node.server, ua.ObjectIds.RootFolder) |
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button = GetNodeTextButton(parent, node, startnode) |
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return button |
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elif idx.column() == 0: |
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node = Node(self._widget.node.server, ref.ReferenceTypeId) |
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startnode = Node(self._widget.node.server, ua.ObjectIds.ReferenceTypesFolder) |
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button = GetNodeTextButton(parent, node, startnode) |
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return button |
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@trycatchslot |
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def setModelData(self, editor, model, idx): |
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data_idx = idx.sibling(idx.row(), 0) |
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ref = model.data(data_idx, Qt.UserRole) |
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self._widget.do_remove_ref(ref, check=False) |
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if idx.column() == 0: |
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ref.ReferenceTypeId = editor.get_node().nodeid |
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model.setData(idx, ref.ReferenceTypeId.to_string(), Qt.DisplayRole) |
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elif idx.column() == 1: |
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ref.NodeId = editor.get_node().nodeid |
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ref.NodeClass = editor.get_node().get_node_class() |
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model.setData(idx, ref.NodeId.to_string(), Qt.DisplayRole) |
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model.setData(data_idx, ref, Qt.UserRole) |
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if ref.NodeId.is_null() or ref.ReferenceTypeId.is_null(): |
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logger.info("Do not save yet. Need NodeId and ReferenceTypeId to be set") |
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return |
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self._write_ref(ref) |
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def _write_ref(self, ref): |
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logger.info("Writing ref %s", ref) |
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it = ua.AddReferencesItem() |
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it.SourceNodeId = self._widget.node.nodeid |
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it.ReferenceTypeId = ref.ReferenceTypeId |
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it.IsForward = ref.IsForward |
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it.TargetNodeId = ref.NodeId |
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it.TargetNodeClass = ref.NodeClass |
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results = self._widget.node.server.add_references([it]) |
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results[0].check() |
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self.reference_changed.emit(self._widget.node) |
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self._widget.reload() |
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FreeOpcUa /
opcua-widgets
