/** \page kte_design Overview of the Core Interface Design

<p><b>
\ref index "Overview" |
Design |
\ref kte_guidelines "Coding Guidelines" |
\ref kte_port_to_5 "Porting to KDE Frameworks 5"
</b></p>

The core of the KTextEditor interfaces consists of three main interfaces:
- KTextEditor::Editor (singleton) \n
  The Editor is a singleton accessed through KTextEditor::Editor::instance().
  This singleton allows to create documents, get a document list, and a be
  informed when a new document is created.
- KTextEditor::Document \n
  The Document interface represents a single document and enables the creation of
  views, access to and manipulation of document contents, and access to document
  extension interfaces.
- KTextEditor::View \n
  The View provides a widget that displays the contents of a Document, and its
  interface allows for manipulation of text selection, position of the cursor and mouse,
  text selections, and behavior of the view.  Additionally it provides access to
  the view extension interfaces.

The hierarchy can be illustrated as follows:
\image html ktexteditorhierarchy.png "Basic KTextEditor Hierarchy"

\section kte_design_user Notes for KTextEditor Users
To use the KTextEditor framework you first have to get the KTextEditor::Editor
singleton through KTextEditor::Editor::instance(). Using this object, documents
can be created and deleted.

\section kte_design_part Using KTextEditor as KPart
If linking to KF5::TextEditor is not an option, you can also access the
KTextEditor framework as follows
\code
  KService::Ptr service = KService::serviceByDesktopPath("katepart");
  if (service) {
      m_part = service->createInstance<KParts::ReadWritePart>(0);
  }
\endcode

\section kte_design_developer Notes for KTextEditor Developers
The KTextEditor::Editor has a list of all opened documents and can create new
documents. A Document's content is visualized by a KTextEditor::View. A Document
can have any number of views (or none). When the content of the document is
changed, the change is reflected in all views.

\see KTextEditor::Editor, KTextEditor::Document, KTextEditor::View

\author Dominik Haumann \<dhaumann@kde.org\>
*/