Qt Creator API Reference

The core of Qt Creator is basically only a plugin loader. All functionality is implemented in plugins. The basis of Qt Creator is implemented in the Core plugin. The plugin manager provides simple means for plugin cooperation that allow plugins to provide hooks for other plugin's extensions.


Core Libraries

There are a few core libraries used by many parts of Qt Creator.

Library NameDescription
AggregationAdds functionality for glueing QObjects of different types together, so you can cast between them.
ExtensionSystemImplements the plugin loader framework. Provides a base class for plugins and basic mechanisms for plugin interaction like an object pool.


As already mentioned, Qt Creator is basically only a plugin loader framework which gets its IDE functionality through plugins. The most important plugin is the Core plugin which provides all the basic functionality needed later to integrate e.g. editors or mode windows.

Plugin NameDescription
CoreThe core plugin. Provides the main window and managers for editors, actions, mode windows and files, just to mention the most important ones.

This plugin also contains classes necessary to hook into the Locator as well as support for searching text in arbitrary widgets.


© 2022 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.