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/****************************************************************************
**
** Copyright (C) 2019 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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**
** GNU Free Documentation License Usage
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** 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
in the 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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