1// Copyright (C) 2018 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#ifndef QOPCUA_OPCUACONNECTION_P_H
5#define QOPCUA_OPCUACONNECTION_P_H
6
7#include <private/opcuareaditem_p.h>
8#include <private/opcuaserverdiscovery_p.h>
9
10#include <QJSValue>
11#include <QObject>
12#include <QOpcUaClient>
13#include <QOpcUaAuthenticationInformation>
14
15#include <QtQml/qqml.h>
16
17//
18// W A R N I N G
19// -------------
20//
21// This file is not part of the Qt API. It exists purely as an
22// implementation detail. This header file may change from version to
23// version without notice, or even be removed.
24//
25// We mean it.
26//
27
28QT_BEGIN_NAMESPACE
29
30class QOpcUaReadResult;
31class OpcUaEndpointDiscovery;
32
33class OpcUaConnection : public QObject
34{
35 Q_OBJECT
36 Q_DISABLE_COPY(OpcUaConnection)
37 Q_PROPERTY(QStringList availableBackends READ availableBackends NOTIFY availableBackendsChanged)
38 Q_PROPERTY(bool connected READ connected NOTIFY connectedChanged)
39 Q_PROPERTY(QString backend READ backend WRITE setBackend NOTIFY backendChanged)
40 Q_PROPERTY(bool defaultConnection READ defaultConnection WRITE setDefaultConnection NOTIFY defaultConnectionChanged)
41 Q_PROPERTY(QStringList namespaces READ namespaces NOTIFY namespacesChanged)
42 Q_PROPERTY(QOpcUaAuthenticationInformation authenticationInformation READ authenticationInformation WRITE setAuthenticationInformation)
43 Q_PROPERTY(QStringList supportedSecurityPolicies READ supportedSecurityPolicies CONSTANT)
44 Q_PROPERTY(QJSValue supportedUserTokenTypes READ supportedUserTokenTypes CONSTANT)
45 Q_PROPERTY(QOpcUaEndpointDescription currentEndpoint READ currentEndpoint)
46 Q_PROPERTY(QOpcUaClient* connection READ connection WRITE setConnection NOTIFY connectionChanged)
47 QML_NAMED_ELEMENT(Connection)
48 QML_ADDED_IN_VERSION(5, 12)
49
50public:
51 OpcUaConnection(QObject *parent = nullptr);
52 ~OpcUaConnection();
53 QStringList availableBackends() const;
54 bool connected() const;
55 void setBackend(const QString &name);
56 QString backend() const;
57 static OpcUaConnection *defaultConnection();
58 bool isDefaultConnection() const;
59 QStringList namespaces() const;
60
61 QOpcUaEndpointDescription currentEndpoint() const;
62
63 QOpcUaAuthenticationInformation authenticationInformation() const;
64 Q_INVOKABLE bool readNodeAttributes(const QJSValue &value);
65 Q_INVOKABLE bool writeNodeAttributes(const QJSValue &value);
66
67 QStringList supportedSecurityPolicies() const;
68 QJSValue supportedUserTokenTypes() const;
69
70 QOpcUaClient *connection() const;
71
72public slots:
73 void connectToEndpoint(const QOpcUaEndpointDescription &endpointDescription);
74 void disconnectFromEndpoint();
75 void setDefaultConnection(bool defaultConnection = true);
76 void setAuthenticationInformation(const QOpcUaAuthenticationInformation &authenticationInformation);
77 void setConnection(QOpcUaClient *client);
78
79signals:
80 void availableBackendsChanged();
81 void connectedChanged();
82 void backendChanged();
83 void defaultConnectionChanged();
84 void namespacesChanged();
85 void readNodeAttributesFinished(const QVariant &value);
86 void writeNodeAttributesFinished(const QVariant &value);
87 void connectionChanged();
88
89private slots:
90 void clientStateHandler(QOpcUaClient::ClientState state);
91 void handleReadNodeAttributesFinished(const QList<QOpcUaReadResult> &results);
92 void handleWriteNodeAttributesFinished(const QList<QOpcUaWriteResult> &results);
93
94private:
95 void removeConnection();
96 void setupConnection();
97
98 QOpcUaClient *m_client = nullptr;
99 bool m_connected = false;
100 static OpcUaConnection* m_defaultConnection;
101
102friend class OpcUaNode;
103friend class OpcUaValueNode;
104friend class OpcUaMethodNode;
105friend class OpcUaEndpointDiscovery;
106friend class OpcUaServerDiscovery;
107};
108
109QT_END_NAMESPACE
110
111#endif // QOPCUA_OPCUACONNECTION_P_H
112

source code of qtopcua/src/declarative_opcua/opcuaconnection_p.h