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tdevelop/lib/interfaces/extensions/Mainpage.dox

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/**
@mainpage The KDevelop Extension Interfaces Library
This library contains extension interfaces used by KDevelop plugin architecture.
<b>Link with</b>: -lkdevelop
<b>Include path</b>: -I\$(kde_includes)/kdevelop/interfaces/extensions
\section whatisextension What is the KDevelop extension
Extension is a KDevelop plugin which implements one of extension interfaces.
Extension is usually not important enough to be returned by @ref KDevApi and @ref KDevPlugin
methods. Therefore extension instance can be obtained by @ref KDevPlugin::extension method.
Note: extension plugins can be either core, global and project plugins. They are loaded
in the same way other plugins are. But extensions differ from usual plugins.
Note: many plugins implementing extension interface can be created but only one of
those should be loaded at a time. This can be accomplished by:
- using a shell plugin profile (as done in current generic shell implementation) - define
different X-KDevelop-Properties for different extension implementations;
- writing project manager which looks into the project file and loads the neccesary extension.
\section creatingextension Creating and using an extension
- Define a service, use following .desktop file:
@code
[Desktop Entry]
Encoding=UTF-8
Type=ServiceType
X-KDE-ServiceType=KDevelop/MyExtension
X-KDE-Derived=KDevelop/Plugin
Name=My Extension Interface
[PropertyDef::X-KDevelop-Version]
Type=int
@endcode
- Define an abstract base class for an extension like:
@code
class KDevMyExtension: public KDevPlugin {
public:
KDevMyExtension(const KDevPluginInfo *info, QObject* parent, const char* name)
:KDevPlugin(info, parent, name) {}
virtual void doSomething() = 0;
};
@endcode
- Create an usual plugin, but instead of setting service type to "KDevelop/Plugin", set:
@code
ServiceTypes=KDevelop/MyExtension
@endcode
- Use your extension:
@code
KDevMyExtension *myext = extension<KDevMyExtension>("KDevelop/MyExtension");
if (sf) {
// do something
} else {
// fail
}
@endcode
*/