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import logging |
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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 QMenu, QAction, QStyledItemDelegate |
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from opcua import ua |
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from uawidgets.utils import trycatchslot |
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logger = logging.getLogger(__name__) |
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class NamespaceWidget(QObject): |
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error = pyqtSignal(Exception) |
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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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delegate = MyDelegate(self.view, self) |
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delegate.error.connect(self.error.emit) |
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self.view.setItemDelegate(delegate) |
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self.node = None |
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self.view.header().setSectionResizeMode(1) |
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self.addNamespaceAction = QAction("Add Namespace", self.model) |
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self.addNamespaceAction.triggered.connect(self.add_namespace) |
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self.removeNamespaceAction = QAction("Remove Namespace", self.model) |
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self.removeNamespaceAction.triggered.connect(self.remove_namespace) |
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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.addNamespaceAction) |
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self._contextMenu.addAction(self.removeNamespaceAction) |
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@trycatchslot |
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def add_namespace(self): |
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uries = self.node.get_value() |
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newidx = len(uries) |
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it = self.model.item(0, 0) |
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uri_it = QStandardItem("") |
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it.appendRow([QStandardItem(), QStandardItem(str(newidx)), uri_it]) |
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idx = self.model.indexFromItem(uri_it) |
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self.view.edit(idx) |
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@trycatchslot |
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def remove_namespace(self): |
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idx = self.view.currentIndex() |
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if not idx.isValid() or idx == self.model.item(0, 0): |
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logger.warning("No valid item selected to remove") |
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idx = idx.sibling(idx.row(), 2) |
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item = self.model.itemFromIndex(idx) |
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uri = item.text() |
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uries = self.node.get_value() |
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uries.remove(uri) |
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logger.info("Writting namespace array: %s", uries) |
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self.node.set_value(uries) |
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self.reload() |
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def set_node(self, node): |
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self.model.clear() |
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self.node = node |
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self.show_array() |
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def reload(self): |
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self.set_node(self.node) |
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def show_array(self): |
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self.model.setHorizontalHeaderLabels(['Browse Name', 'Index', 'Value']) |
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name_item = QStandardItem(self.node.get_browse_name().Name) |
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self.model.appendRow([name_item, QStandardItem(""), QStandardItem()]) |
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it = self.model.item(0, 0) |
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val = self.node.get_value() |
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for idx, url in enumerate(val): |
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it.appendRow([QStandardItem(), QStandardItem(str(idx)), QStandardItem(url)]) |
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self.view.expandAll() |
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def clear(self): |
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self.model.clear() |
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def showContextMenu(self, position): |
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self.removeNamespaceAction.setEnabled(False) |
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idx = self.view.currentIndex() |
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if not idx.isValid(): |
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return |
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if idx.parent().isValid() and idx.row() >= 1: |
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self.removeNamespaceAction.setEnabled(True) |
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self._contextMenu.exec_(self.view.viewport().mapToGlobal(position)) |
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class MyDelegate(QStyledItemDelegate): |
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error = pyqtSignal(Exception) |
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attr_written = pyqtSignal(ua.AttributeIds, ua.DataValue) |
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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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""" |
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Called when editing starts, here can we override default editor, |
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disable editing for some values, etc... |
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""" |
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if idx.column() != 2 or idx.row() == 0: |
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return None |
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return QStyledItemDelegate.createEditor(self, parent, option, idx) |
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@trycatchslot |
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def setModelData(self, editor, model, idx): |
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""" |
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Called when editor has finished editing data |
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Here we call the default implementation and save our values |
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""" |
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QStyledItemDelegate.setModelData(self, editor, model, idx) |
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root = model.item(0, 0) |
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uries = [] |
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count = 0 |
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while True: |
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child = root.child(count, 2) |
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count += 1 |
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if not child: |
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break |
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uries.append(child.text()) |
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logger.info("Writting namespace array: %s", uries) |
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self.widget.node.set_value(uries) |
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FreeOpcUa /
opcua-modeler
