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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the QtLocation module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
***************************************************************************/
#include <qnumeric.h>
#include "qdeclarativegeoboundingcircle_p.h"
QT_BEGIN_NAMESPACE
/*!
\qmlclass BoundingCircle QDeclarativeGeoBoundingCircle
\inqmlmodule QtLocation 5
\ingroup qml-QtLocation5-positioning
\since Qt Location 5.0
\brief The BoundingCircle element represents a circular geographic area.
The circle is defined in terms of a \l{QDeclarativeCoordinate}{Coordinate}
which specifies the center of the circle and a qreal which specifies the
radius of the circle in meters.
The circle is considered invalid if the center coordinate is invalid
or if the radius is less than zero.
\section2 Example Usage
The following code snippet shows the declaration of a BoundingCircle element.
\code
BoundingCircle {
radius: 25.0
center: Coordinate {
latitude: 23.34
longitude: 44.4
}
}
\endcode
This could then be used, for example, as a region to scan for landmarks,
or refining searches.
\sa QGeoBoundingCircle
*/
QDeclarativeGeoBoundingCircle::QDeclarativeGeoBoundingCircle(QObject *parent)
: QDeclarativeGeoBoundingArea(parent), m_center(0), m_radius(-1.0)
{
}
QDeclarativeGeoBoundingCircle::QDeclarativeGeoBoundingCircle(const QGeoBoundingCircle &circle,
QObject *parent)
: QDeclarativeGeoBoundingArea(parent), m_center(0), m_circle(circle), m_radius(qQNaN())
{
synchronizeDeclarative(circle, false);
}
/*!
\qmlproperty QGeoBoundingCircle BoundingCircle::circle
For details on how to use this property to interface between C++ and QML see
"\l {location-cpp-qml.html#boundingcircle} {Interfaces between C++ and QML Code}".
*/
void QDeclarativeGeoBoundingCircle::setCircle(const QGeoBoundingCircle &circle)
{
QGeoBoundingCircle oldCircle = m_circle;
m_circle = circle;
synchronizeDeclarative(oldCircle, false);
}
QGeoBoundingCircle QDeclarativeGeoBoundingCircle::circle() const
{
return m_circle;
}
/*!
\internal
*/
QGeoBoundingArea QDeclarativeGeoBoundingCircle::area() const
{
return circle();
}
/*!
\qmlmethod bool QDeclarativeGeoBoundingCircle::contains(Coordinate coordinate)
Returns the true if \a coordinate is within the bounding circle; otherwise returns false.
*/
bool QDeclarativeGeoBoundingCircle::contains(QDeclarativeCoordinate *coordinate)
{
if (!coordinate)
return false;
return m_circle.contains(coordinate->coordinate());
}
/*!
\qmlproperty Coordinate BoundingCircle::center
This property holds the coordinate of the center of the bounding circle.
Note: this property's changed() signal is currently emitted only if the
whole element changes, not if only the contents of the element change.
*/
QDeclarativeCoordinate *QDeclarativeGeoBoundingCircle::center()
{
if (!m_center) {
m_center = new QDeclarativeCoordinate(m_circle.center(), this);
connect(m_center, SIGNAL(coordinateChanged(QGeoCoordinate)),
this, SLOT(coordinateChanged()));
}
return m_center;
}
void QDeclarativeGeoBoundingCircle::setCenter(QDeclarativeCoordinate *coordinate)
{
if (m_center == coordinate)
return;
if (m_center) {
disconnect(m_center, SIGNAL(coordinateChanged(QGeoCoordinate)),
this, SLOT(coordinateChanged()));
if (m_center->parent() == this)
delete m_center;
}
m_center = coordinate;
if (m_center) {
connect(m_center, SIGNAL(coordinateChanged(QGeoCoordinate)),
this, SLOT(coordinateChanged()));
}
QGeoBoundingCircle oldCircle = m_circle;
m_circle.setCenter(coordinate ? coordinate->coordinate() : QGeoCoordinate());
synchronizeDeclarative(oldCircle, true);
emit centerChanged();
}
/*!
\qmlproperty qreal BoundingCircle::radius
This property holds the radius of the bounding circle in meters.
The default value for the radius is -1 indicating an invalid bounding circle area.
*/
qreal QDeclarativeGeoBoundingCircle::radius() const
{
return m_radius;
}
void QDeclarativeGeoBoundingCircle::setRadius(qreal radius)
{
QGeoBoundingCircle oldCircle = m_circle;
m_circle.setRadius(radius);
synchronizeDeclarative(oldCircle, false);
}
/*!
\internal
*/
void QDeclarativeGeoBoundingCircle::coordinateChanged()
{
QDeclarativeCoordinate *c = qobject_cast<QDeclarativeCoordinate *>(sender());
if (!c)
return;
QGeoBoundingCircle oldCircle = m_circle;
if (c == m_center) {
m_circle.setCenter(c->coordinate());
synchronizeDeclarative(oldCircle, true);
}
}
/*!
\internal
*/
void QDeclarativeGeoBoundingCircle::synchronizeDeclarative(const QGeoBoundingCircle &old, bool skipCenter)
{
if (!skipCenter && m_center && old.center() != m_circle.center())
m_center->setCoordinate(m_circle.center());
// Check not to compare two Not a Numbers, which by definition is 'false'.
if ((!qIsNaN(old.radius()) || !qIsNaN(m_circle.radius())) && old.radius() != m_circle.radius()) {
m_radius = m_circle.radius();
emit radiusChanged();
}
}
#include "moc_qdeclarativegeoboundingcircle_p.cpp"
QT_END_NAMESPACE
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