qdbus 複雜類型

openSUSE imagewriter is a GPL licensed project which contains an example of how to do this. (Relevant files: udisks2_interface.*)

a{sv} is a dict of string:variant pairs. QVariantMap would fit this signature.

a{sa{sv}} is a dict of string:a{sv} pairs. QMap<QString, QVariantMap> would fit this signature.

a{oa{sa{sv}}} is a dict of objectpath:a{sa{sv}} pairs. QMap<QDBusObjectPath, QMap<QString, QVariantMap>> would fit this signature.

We should hide those angle-brackets behind some typedefs in a header file:

typedef QMap<QString, QVariantMap> InterfaceList; typedef QMap<QDBusObjectPath, InterfaceList> ManagedObjectList; Then declare their QMetaTypes in the same header file:

Q_DECLARE_METATYPE(InterfaceList) Q_DECLARE_METATYPE(ManagedObjectList) Then register them with the Qt metatype system at runtime:

qDBusRegisterMetaType<InterfaceList>(); qDBusRegisterMetaType<ManagedObjectList>(); Then we can annotate the XML:

<method name="GetManagedObjects"> <arg type="a{oa{sa{sv}}}" name="objects" direction="out"> <annotation name="org.qtproject.QtDBus.QtTypeName.Out0" value="ManagedObjectList"/> </arg> </method> <signal name="InterfacesAdded"> <arg type="o" name="object"/> <arg type="a{sa{sv}}" name="interfaces"> <annotation name="org.qtproject.QtDBus.QtTypeName.In1" value="InterfaceList"/> </arg> </signal>