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from PyQt5.QtCore import pyqtSignal |
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from PyQt5.QtWidgets import QTreeView, QDialog, QHBoxLayout, QVBoxLayout, QDialogButtonBox, QAbstractItemView, QPushButton, QLineEdit, QWidget |
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from PyQt5.QtCore import Qt |
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from opcua import Node, ua |
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from uawidgets.tree_widget import TreeWidget |
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class GetNodeTextButton(QWidget): |
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""" |
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Create a text field with a button which will query a node |
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""" |
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def __init__(self, parent, currentnode, startnode): |
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QWidget.__init__(self, parent) |
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#QWidget.__init__(self) |
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if currentnode.nodeid.is_null(): |
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text = "Null" |
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else: |
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text = currentnode.nodeid.to_string() |
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self.lineEdit = QLineEdit(parent) |
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self.lineEdit.setText(text) |
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self.button = QPushButton(parent) |
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self.button.setText("...") |
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self.button.setMinimumWidth(5) |
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self.layout = QHBoxLayout(parent) |
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self.layout.setSpacing(0) |
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self.layout.setContentsMargins(0, 0, 0, 0) |
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self.layout.addWidget(self.lineEdit) |
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self.layout.addWidget(self.button) |
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self.setLayout(self.layout) |
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self.server = currentnode.server |
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self.start_node = startnode |
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self.button.clicked.connect(self.get_new_node) |
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def get_new_node(self): |
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node = self.get_node() |
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node, ok = GetNodeDialog.getNode(self, self.start_node, currentnode=node) |
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if ok: |
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self.lineEdit.setText(node.nodeid.to_string()) |
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def get_node(self): |
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text = self.lineEdit.text() |
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if text and text not in ("None", "Null"): |
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current = ua.NodeId.from_string(text) |
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else: |
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current = ua.NodeId() |
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return Node(self.server, current) |
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class GetNodeButton(QPushButton): |
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""" |
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Create Button which will query a node |
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""" |
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value_changed = pyqtSignal(Node) |
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60
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def __init__(self, parent, currentnode, startnode): |
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text = "Null" |
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try: |
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text = currentnode.get_browse_name().to_string() |
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except ua.UaError: |
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pass |
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QPushButton.__init__(self, text, parent) |
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self._current_node = currentnode |
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self.start_node = startnode |
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self.clicked.connect(self.get_new_node) |
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def get_new_node(self): |
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node, ok = GetNodeDialog.getNode(self, self.start_node, currentnode=self._current_node) |
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if ok: |
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self._current_node = node |
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self.setText(self._current_node.get_browse_name().to_string()) |
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self.value_changed.emit(self._current_node) |
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def get_node(self): |
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return self._current_node |
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81
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class GetNodeDialog(QDialog): |
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def __init__(self, parent, startnode, currentnode=None): |
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QDialog.__init__(self, parent) |
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layout = QVBoxLayout(self) |
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self.treeview = QTreeView(self) |
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self.treeview.setEditTriggers(QAbstractItemView.NoEditTriggers) |
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self.tree = TreeWidget(self.treeview) |
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self.tree.set_root_node(startnode) |
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layout.addWidget(self.treeview) |
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self.buttons = QDialogButtonBox( |
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QDialogButtonBox.Ok | QDialogButtonBox.Cancel, |
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Qt.Horizontal, self) |
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layout.addWidget(self.buttons) |
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self.resize(800, 600) |
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self.buttons.accepted.connect(self.accept) |
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self.buttons.rejected.connect(self.reject) |
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self.treeview.activated.connect(self.accept) |
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if currentnode: |
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self.tree.expand_to_node(currentnode) |
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107
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108
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def get_node(self): |
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return self.tree.get_current_node() |
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111
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@staticmethod |
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def getNode(parent, startnode, currentnode=None): |
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dialog = GetNodeDialog(parent, startnode, currentnode) |
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result = dialog.exec_() |
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node = dialog.get_node() |
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return node, result == QDialog.Accepted |
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FreeOpcUa /
opcua-widgets
