src_qdbus_qdbusargument.cpp

Go to the documentation of this file.

// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
#include <QString>
#include <QDBusArgument>
#include <QDBusMetaType>
#include <QDBusMessage>
#include <QDBusContext>
 
typedef QDBusVariant MyElement;
typedef QList<MyElement> MyArray;
typedef QHash<int, MyElement> MyDictionary;
typedef QDBusVariant MyType;
typedef QDBusVariant MyValue;
typedef QDBusVariant Type;
QDBusArgument argument;
 
class MyObject: public QObject
{
    Q_OBJECT
 
    Q_CLASSINFO("D-Bus Interface", "org.qtproject.QtDBus.MyObject")
    Q_CLASSINFO("D-Bus Introspection", ""
"  <interface name=\"org.qtproject.QtDBus.MyObject\" >\n"
"    <property access=\"readwrite\" type=\"i\" name=\"prop1\" />\n"
"    <property name=\"complexProp\" type=\"ai\" access=\"readwrite\">\n"
"      <annotation name=\"org.qtproject.QtDBus.QtTypeName\" value=\"QList&lt;int&gt;\"/>\n"
"    </property>\n"
"    <signal name=\"somethingHappened\" >\n"
"      <arg direction=\"out\" type=\"s\" />\n"
"    </signal>\n"
"    <method name=\"ping\" >\n"
"      <arg direction=\"in\" type=\"v\" name=\"ping\" />\n"
"      <arg direction=\"out\" type=\"v\" name=\"ping\" />\n"
"    </method>\n"
"    <method name=\"ping_invokable\" >\n"
"      <arg direction=\"in\" type=\"v\" name=\"ping_invokable\" />\n"
"      <arg direction=\"out\" type=\"v\" name=\"ping_invokable\" />\n"
"    </method>\n"
"    <method name=\"ping\" >\n"
"      <arg direction=\"in\" type=\"v\" name=\"ping1\" />\n"
"      <arg direction=\"in\" type=\"v\" name=\"ping2\" />\n"
"      <arg direction=\"out\" type=\"v\" name=\"pong1\" />\n"
"      <arg direction=\"out\" type=\"v\" name=\"pong2\" />\n"
"    </method>\n"
"    <method name=\"ping_invokable\" >\n"
"      <arg direction=\"in\" type=\"v\" name=\"ping1_invokable\" />\n"
"      <arg direction=\"in\" type=\"v\" name=\"ping2_invokable\" />\n"
"      <arg direction=\"out\" type=\"v\" name=\"pong1_invokable\" />\n"
"      <arg direction=\"out\" type=\"v\" name=\"pong2_invokable\" />\n"
"    </method>\n"
"    <method name=\"ping\" >\n"
"      <arg direction=\"in\" type=\"ai\" name=\"ping\" />\n"
"      <arg direction=\"out\" type=\"ai\" name=\"ping\" />\n"
"      <annotation name=\"org.qtproject.QtDBus.QtTypeName.In0\" value=\"QList&lt;int&gt;\"/>\n"
"      <annotation name=\"org.qtproject.QtDBus.QtTypeName.Out0\" value=\"QList&lt;int&gt;\"/>\n"
"    </method>\n"
"    <method name=\"ping_invokable\" >\n"
"      <arg direction=\"in\" type=\"ai\" name=\"ping_invokable\" />\n"
"      <arg direction=\"out\" type=\"ai\" name=\"ping_invokable\" />\n"
"      <annotation name=\"org.qtproject.QtDBus.QtTypeName.In0\" value=\"QList&lt;int&gt;\"/>\n"
"      <annotation name=\"org.qtproject.QtDBus.QtTypeName.Out0\" value=\"QList&lt;int&gt;\"/>\n"
"    </method>\n"
"  </interface>\n"
        "")
    Q_PROPERTY(int prop1 READ prop1 WRITE setProp1)
    Q_PROPERTY(QList<int> complexProp READ complexProp WRITE setComplexProp)
 
public:
    static int callCount;
    static QVariantList callArgs;
    MyObject()
    {
        QObject *subObject = new QObject(this);
        subObject->setObjectName("subObject");
    }
};
 
struct MyMember
{
    int subMember1;
    int subMember2;
};
 
struct MyStructure
{
    int count;
    QString name;
    MyMember member1;
    MyMember member2;
    MyMember member3;
    MyMember member4;
    // ...
};
Q_DECLARE_METATYPE(MyStructure)
 
// Marshall the MyStructure data into a D-Bus argument
QDBusArgument &operator<<(QDBusArgument &argument, const MyStructure &myStruct)
{
    argument.beginStructure();
    argument << myStruct.count << myStruct.name;
    argument.endStructure();
    return argument;
}
 
// Retrieve the MyStructure data from the D-Bus argument
const QDBusArgument &operator>>(const QDBusArgument &argument, MyStructure &myStruct)
{
    argument.beginStructure();
    argument >> myStruct.count >> myStruct.name;
    argument.endStructure();
    return argument;
}
 
const QDBusArgument &operator<<(const QDBusArgument &argument, const MyMember &/*member*/)
{
    return argument;
}
 
const QDBusArgument &operator>>(const QDBusArgument &argument, const MyMember &/*member*/)
{
    return argument;
}
 
void registerMyStructure()
{
qDBusRegisterMetaType<MyStructure>();
}
 
void castType()
{
QVariant argument = MyObject::callArgs.at(0);
QDBusVariant dv = qdbus_cast<QDBusVariant>(argument);
MyType item = qdbus_cast<Type>(argument);
}
 
void argumentItem()
{
MyType item;
argument >> item;
}
namespace QDBusSnippets
{
QDBusArgument &operator<<(QDBusArgument &argument, const MyStructure &myStruct)
{
    argument.beginStructure();
    argument << myStruct.member1 << myStruct.member2;
    argument.endStructure();
    return argument;
}
 
namespace Alt {
QDBusArgument &operator<<(QDBusArgument &argument, const MyStructure &myStruct)
{
    argument.beginStructure();
    argument << myStruct.member1 << myStruct.member2;
 
    argument.beginStructure();
    argument << myStruct.member3.subMember1 << myStruct.member3.subMember2;
    argument.endStructure();
 
    argument << myStruct.member4;
    argument.endStructure();
    return argument;
}
} // namespace
 
// Append an array of MyElement types
QDBusArgument &operator<<(QDBusArgument &argument, const MyArray &myArray)
{
    argument.beginArray(qMetaTypeId<MyElement>());
    for (const auto &element : myArray)
        argument << element;
    argument.endArray();
    return argument;
}
 
// Append a dictionary that associates ints to MyValue types
QDBusArgument &operator<<(QDBusArgument &argument, const MyDictionary &myDict)
{
    argument.beginMap(QMetaType::fromType<int>(), QMetaType::fromType<MyValue>());
    MyDictionary::const_iterator i;
    for (i = myDict.cbegin(); i != myDict.cend(); ++i) {
        argument.beginMapEntry();
        argument << i.key() << i.value();
        argument.endMapEntry();
    }
    argument.endMap();
    return argument;
}
 
const QDBusArgument &operator>>(const QDBusArgument &argument, MyStructure &myStruct)
{
    argument.beginStructure();
    argument >> myStruct.member1 >> myStruct.member2 >> myStruct.member3;
    argument.endStructure();
    return argument;
}
 
// Extract a MyArray array of MyElement elements
const QDBusArgument &operator>>(const QDBusArgument &argument, MyArray &myArray)
{
    argument.beginArray();
    myArray.clear();
 
    while (!argument.atEnd()) {
        MyElement element;
        argument >> element;
        myArray.append(element);
    }
 
    argument.endArray();
    return argument;
}
 
// Extract a MyDictionary map that associates integers to MyElement items
const QDBusArgument &operator>>(const QDBusArgument &argument, MyDictionary &myDict)
{
    argument.beginMap();
    myDict.clear();
 
    while (!argument.atEnd()) {
        int key;
        MyElement value;
        argument.beginMapEntry();
        argument >> key >> value;
        argument.endMapEntry();
        myDict.insert(key, value);
    }
 
    argument.endMap();
    return argument;
}
}