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.
UtilsGeneral utility library.
QmlJSQML and JavaScript language support library.

Additional libraries

Library NameDescription
qtcreatorcdbextWindows CDB debugger extension


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.

ProjectExplorerThe project explorer plugin. Provides base classes for project handling.
DebuggerDebugging functionality.
VcsBaseBase classes for version control support.
TextEditorThis is where everything starts if you want to create a text editor. Besides the base editor itself, this plugin contains APIs for supporting functionality like snippets, highlighting, code assist, indentation and style, and others.