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from PyQt5.QtCore import pyqtSignal, Qt, QObject |
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from PyQt5.QtGui import QStandardItemModel, QStandardItem |
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from PyQt5.QtWidgets import QApplication, QMenu, QAction |
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from opcua import ua |
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from opcua.common.ua_utils import string_to_variant, variant_to_string, val_to_string |
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class AttrsWidget(QObject): |
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error = pyqtSignal(str) |
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def __init__(self, view): |
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QObject.__init__(self, view) |
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self.view = view |
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self.model = QStandardItemModel() |
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self.view.setModel(self.model) |
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self.current_node = None |
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self.view.doubleClicked.connect(self.edit_attr) |
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self.model.itemChanged.connect(self.edit_attr_finished) |
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self.view.header().setSectionResizeMode(1) |
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# Context menu |
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self.view.setContextMenuPolicy(Qt.CustomContextMenu) |
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self.view.customContextMenuRequested.connect(self.showContextMenu) |
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copyaction = QAction("&Copy Value", self.model) |
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copyaction.triggered.connect(self._copy_value) |
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self._contextMenu = QMenu() |
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self._contextMenu.addAction(copyaction) |
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def _check_edit(self, item): |
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""" |
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filter only element we want to edit. |
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take either idx eller item as argument |
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""" |
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if item.column() != 1: |
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return False |
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name_item = self.model.item(item.row(), 0) |
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if name_item.text() != "Value": |
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return False |
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return True |
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def edit_attr(self, idx): |
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if not self._check_edit(idx): |
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return |
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attritem = self.model.item(idx.row(), 0) |
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if attritem.text() == "Value": |
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self.view.edit(idx) |
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def edit_attr_finished(self, item): |
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if not self._check_edit(item): |
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return |
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try: |
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var = item.data() |
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val = item.text() |
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var = string_to_variant(val, var.VariantType) |
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self.current_node.set_value(var) |
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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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finally: |
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dv = self.current_node.get_data_value() |
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item.setText(variant_to_string(dv.Value)) |
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name_item = self.model.item(item.row(), 0) |
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name_item.child(0, 1).setText(val_to_string(dv.ServerTimestamp)) |
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name_item.child(1, 1).setText(val_to_string(dv.SourceTimestamp)) |
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def showContextMenu(self, position): |
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item = self.get_current_item() |
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if item: |
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self._contextMenu.exec_(self.view.mapToGlobal(position)) |
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def get_current_item(self, col_idx=0): |
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idx = self.view.currentIndex() |
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return self.model.item(idx.row(), col_idx) |
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def _copy_value(self, position): |
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it = self.get_current_item(1) |
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if it: |
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QApplication.clipboard().setText(it.text()) |
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def clear(self): |
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self.model.clear() |
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def show_attrs(self, node): |
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self.current_node = node |
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self.model.clear() |
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if self.current_node: |
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self._show_attrs() |
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self.view.expandAll() |
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def _show_attrs(self): |
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attrs = self.get_all_attrs() |
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self.model.setHorizontalHeaderLabels(['Attribute', 'Value', 'DataType']) |
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for name, dv in attrs: |
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if name == "DataType": |
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if isinstance(dv.Value.Value.Identifier, int) and dv.Value.Value.Identifier < 63: |
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string = ua.DataType_to_VariantType(dv.Value.Value).name |
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elif dv.Value.Value.Identifier in ua.ObjectIdNames: |
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string = ua.ObjectIdNames[dv.Value.Value.Identifier] |
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else: |
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string = dv.Value.Value.to_string() |
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elif name in ("AccessLevel", "UserAccessLevel"): |
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string = ",".join([e.name for e in ua.int_to_AccessLevel(dv.Value.Value)]) |
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elif name in ("WriteMask", "UserWriteMask"): |
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string = ",".join([e.name for e in ua.int_to_WriteMask(dv.Value.Value)]) |
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elif name in ("EventNotifier"): |
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string = ",".join([e.name for e in ua.int_to_EventNotifier(dv.Value.Value)]) |
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else: |
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string = variant_to_string(dv.Value) |
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name_item = QStandardItem(name) |
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vitem = QStandardItem(string) |
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vitem.setData(dv.Value) |
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self.model.appendRow([name_item, vitem, QStandardItem(dv.Value.VariantType.name)]) |
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if name == "Value": |
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string = val_to_string(dv.ServerTimestamp) |
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name_item.appendRow([QStandardItem("Server Timestamp"), QStandardItem(string), QStandardItem(ua.VariantType.DateTime.name)]) |
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string = val_to_string(dv.SourceTimestamp) |
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name_item.appendRow([QStandardItem("Source Timestamp"), QStandardItem(string), QStandardItem(ua.VariantType.DateTime.name)]) |
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def get_all_attrs(self): |
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names = [] |
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vals = [] |
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for name, val in ua.AttributeIds.__dict__.items(): |
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if not name.startswith("_"): |
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names.append(name) |
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vals.append(val) |
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try: |
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attrs = self.current_node.get_attributes(vals) |
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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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res = [] |
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for idx, name in enumerate(names): |
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if attrs[idx].StatusCode.is_good(): |
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res.append((name, attrs[idx])) |
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res.sort() |
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return res |
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FreeOpcUa /
opcua-client-gui
