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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:FDL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Free Documentation License
** Alternatively, this file may be used under the terms of the GNU Free
** Documentation License version 1.3 as published by the Free Software
** Foundation and appearing in the file included in the packaging of this
** file.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
/*!
\page qml-views.html
\ingroup qml-features
\contentspage QML Features
\previouspage {QML Data Models}{Structuring Data with Models}
\nextpage {Extending QML Functionalities using C++}
\title Presenting Data with Views
Views are containers for collections of items. They are feature-rich and can be
customizable to meet style or behavior requirements.
\keyword qml-view-elements
A set of standard views are provided in the basic set of Qt Quick
graphical elements:
\list
\o \l{ListView} arranges items in a horizontal or vertical list
\o \l{GridView} arranges items in a grid within the available space
\o \l{PathView} arranges items on a path
\o \l{WebView}{WebView} - available from the \l {QtWebKit QML Module}.
\endlist
Unlike other views, \l WebView is not a fully-featured view item, and needs
to be combined with a \l Flickable item to create a view that performs like
a Web browser.
These elements have properties and behaviors exclusive to each element. Visit
their respective documentation for more information.
\section1 Models
Views display \l{qml-data-models}{models} onto the screen. A model could be a simple list of \l{QML Data Models#An Integer}{integer} or a \l{qml-c++-models}{C++ model}.
To assign a model to a view, bind the view's \c model property to a model.
\snippet doc/src/snippets/declarative/listview.qml model
\snippet doc/src/snippets/declarative/listview.qml model
For more information, consult the \l {QML Data Models} article.
\keyword qml-view-delegate
\section1 View Delegates
Views need a \e delegate to visually represent an item in a list. A view will
visual each item list according to the template defined by the delegate.
Properties of the model are accessible as well as an \c index property.
\snippet doc/src/snippets/declarative/listview.qml delegate
\image listview-setup.png
\section1 Decorating Views
Views allow visual customization through \e decoration properties such as the \c header, \c footer, and \c section properties. By binding an object, usually
another visual object, to these properties, the views are decoratable. A footer
may include a \l Rectangle element showcasing borders or a header that displays
a logo on top of the list.
Suppose that a specific club wants to decorate its members list with its brand
colors. A member list is in a \c model and the \c delegate will display the
model's content.
\snippet doc/src/snippets/declarative/listview-decorations.qml model
\snippet doc/src/snippets/declarative/listview-decorations.qml delegate
The club may decorate the members list by binding visual objects to the
\c header and \c footer properties. The visual object may be defined inline, in another file, or in a
\l {Component} element.
\snippet doc/src/snippets/declarative/listview-decorations.qml decorations
\image listview-decorations.png
\section1 ListView Sections
\l {ListView} contents may be grouped into \e sections, where related list items
are labelled according to their sections. Further, the sections may be decorated
with \l{qml-view-delegate}{delegates}.
A list may contain a list indicating people's names and the team on which team
the person belongs.
\snippet doc/src/snippets/declarative/listview-sections.qml model
\snippet doc/src/snippets/declarative/listview-sections.qml delegate
The ListView element has the \c section
\l{qml-attached-properties}{attached property} that can combine adjacent
and related elements into a section. The section's \c property property is for
selecting which list element property to use as sections. The \c criteria
can dictate how the section names are displayed and the \c delegate is similar
to the views' \l {qml-view-delegate}{delegate} property.
\snippet doc/src/snippets/declarative/listview-sections.qml section
\image listview-section.png
*/
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