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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:FDL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Free Documentation License Usage
** 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. Please review the following information to ensure
** the GNU Free Documentation License version 1.3 requirements
** will be met: http://www.gnu.org/copyleft/fdl.html.
** $QT_END_LICENSE$
**
****************************************************************************/
/*!
\example declarative/flickr
\title Flickr (QML)
\ingroup qtlocation-examples
\brief The Flickr example shows how to use the user's current location to
fetch local content from a web service.
This is a small example, illustrating one of the very core parts of the
Qt Location API: the ability to retrieve and use the user's current
geographic location.
Key QML types shown in this example:
\list
\li \l{QtLocation5::PositionSource}{PositionSource}
\li \l{XmlListModel}{XmlListModel}
\endlist
\image qml-flickr-1.jpg
\section2 Retrieving the Current Location
Retrieving the user's current location is achieved using the PositionSource
type. In this example, we instantiate the PositionSource as part of the
GeoTab component (the floating "window" describing current location and
status).
\snippet examples/declarative/flickr/flickrmobile/GeoTab.qml possrc
When the "Locate and update" button is pressed, we first interrogate the
PositionSource to check if it has an available backend for positioning
data. If it does not, we fall back to using a pre-recorded NMEA log
for demonstration. We then instruct the PositionSource to update.
\snippet examples/declarative/flickr/flickrmobile/GeoTab.qml locatebutton-top
\snippet examples/declarative/flickr/flickrmobile/GeoTab.qml locatebutton-clicked
To share the new position data with the rest of the application, we use
properties that we have created on the GeoTab component:
\snippet examples/declarative/flickr/flickrmobile/GeoTab.qml props
The longitude and latitude values retrieved here are eventually set on
in properties on the RestModel component. The RestModel is an XmlListModel,
which retrieves XML data from a URL and creates a data model by performing
XPath queries on it.
In this case, it retrieves data from the Flickr REST API online, based on
our current location
\snippet examples/declarative/flickr/flickrcommon/RestModel.qml restmodel
This model data is then shown in a variety of Qt Quick views to produce
the example application.
*/
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