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/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:FDL$
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** information use the contact form at https://www.qt.io/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
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****************************************************************************/
/*!
\example geoflickr
\title GeoFlickr (QML)
\ingroup qtpositioning-examples
\brief The GeoFlickr example shows how to use the user's current position to
fetch local content from a web service.
This is a small example, illustrating one of the very core parts of the
\l{Qt Positioning} API: the ability to retrieve and use the user's current
geographic position.
Key QML types shown in this example:
\list
\li \l{QtPositioning::PositionSource}{PositionSource}
\li \l{XmlListModel}{XmlListModel}
\endlist
\image qml-flickr-1.jpg
\include examples-run.qdocinc
\section1 Retrieving the Current Position
Retrieving the user's current position is achieved using the PositionSource
type. In this example, we instantiate the PositionSource as part of the
GeoTab component (the floating "window" describing current position and
status).
\snippet geoflickr/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 geoflickr/flickrmobile/GeoTab.qml locatebutton-top
\snippet geoflickr/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 geoflickr/flickrmobile/GeoTab.qml props
\section1 Using the Current Position
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 position
\snippet geoflickr/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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