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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtPositioning module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qquickgeocoordinateanimation_p.h"
#include "qquickgeocoordinateanimation_p_p.h"
#include <QtQuick/private/qquickanimation_p_p.h>
#include <QtPositioning/private/qdoublevector2d_p.h>
#include <QtPositioning/private/qgeoprojection_p.h>
#include <QtPositioning/private/qgeocoordinate_p.h>
QT_BEGIN_NAMESPACE
/*!
\qmltype CoordinateAnimation
\instantiates QQuickGeoCoordinateAnimation
\inherits PropertyAnimation
\inqmlmodule QtPositioning
\since 5.3
\brief A PropertyAnimation for geo coordinate properties.
A specialized \l{PropertyAnimation} that defines an animation
between two \l{coordinate}{coordinates}.
By default, a \l{latitude} of the \l{coordinate} is animated in the direction of shortest
(geodesic) distance between those coordinates. Since CoordinateAnimation uses Mercator
map projection, the \l{latitude} animation is always between -90 and 90 degrees.
The \l{longitude} animation path is not limited and can go over 180 degrees
in both west and east directions.
The \l{direction} property can be set to specify the direction in which the \l{longitude}
animation should occur.
\sa {Animation and Transitions in Qt Quick}
*/
QVariant q_coordinateInterpolator(const QGeoCoordinate &from, const QGeoCoordinate &to, qreal progress)
{
if (from == to) {
if (progress < 0.5) {
return QVariant::fromValue(from);
} else {
return QVariant::fromValue(to);
}
}
QGeoCoordinate result = QGeoProjection::coordinateInterpolation(from, to, progress);
return QVariant::fromValue(result);
}
QVariant q_coordinateShortestInterpolator(const QGeoCoordinate &from, const QGeoCoordinate &to, qreal progress)
{
const QGeoMercatorCoordinatePrivate* fromMercator =
static_cast<const QGeoMercatorCoordinatePrivate*>(QGeoCoordinatePrivate::get(&from));
const QGeoMercatorCoordinatePrivate* toMercator =
static_cast<const QGeoMercatorCoordinatePrivate*>(QGeoCoordinatePrivate::get(&to));
double toX = toMercator->m_mercatorX;
double toY = toMercator->m_mercatorY;
double fromX = fromMercator->m_mercatorX;
double fromY = fromMercator->m_mercatorY;
double x;
if (0.5 < qAbs(toX - fromX)) {
// handle dateline crossing
double ex = toX;
double sx = fromX;
if (ex < sx)
sx -= 1.0;
else if (sx < ex)
ex -= 1.0;
x = fromX + (toX - fromX) * progress;
if (x < 0.0)
x += 1.0;
} else {
x = fromX + (toX - fromX) * progress;
}
double y = fromY + (toY - fromY) * progress;
QGeoCoordinate result = QGeoProjection::mercatorToCoord(QDoubleVector2D(x, y));
result.setAltitude(from.altitude() + (to.altitude() - from.altitude()) * progress);
return QVariant::fromValue(result);
}
QVariant q_coordinateWestInterpolator(const QGeoCoordinate &from, const QGeoCoordinate &to, qreal progress)
{
const QGeoMercatorCoordinatePrivate* fromMercator =
static_cast<const QGeoMercatorCoordinatePrivate*>(QGeoCoordinatePrivate::get(&from));
const QGeoMercatorCoordinatePrivate* toMercator =
static_cast<const QGeoMercatorCoordinatePrivate*>(QGeoCoordinatePrivate::get(&to));
double toX = toMercator->m_mercatorX;
double toY = toMercator->m_mercatorY;
double fromX = fromMercator->m_mercatorX;
double fromY = fromMercator->m_mercatorY;
double diff = toX - fromX;
while (diff < 0.0) {
toX += 1.0;
diff += 1.0;
}
double x = fromX + (toX - fromX) * progress;
double y = fromY + (toY - fromY) * progress;
while (x > 1.0)
x -= 1.0;
QGeoCoordinate result = QGeoProjection::mercatorToCoord(QDoubleVector2D(x, y));
result.setAltitude(from.altitude() + (to.altitude() - from.altitude()) * progress);
return QVariant::fromValue(result);
}
QVariant q_coordinateEastInterpolator(const QGeoCoordinate &from, const QGeoCoordinate &to, qreal progress)
{
const QGeoMercatorCoordinatePrivate* fromMercator =
static_cast<const QGeoMercatorCoordinatePrivate*>(QGeoCoordinatePrivate::get(&from));
const QGeoMercatorCoordinatePrivate* toMercator =
static_cast<const QGeoMercatorCoordinatePrivate*>(QGeoCoordinatePrivate::get(&to));
double toX = toMercator->m_mercatorX;
double toY = toMercator->m_mercatorY;
double fromX = fromMercator->m_mercatorX;
double fromY = fromMercator->m_mercatorY;
double diff = toX - fromX;
while (diff > 0.0) {
toX -= 1.0;
diff -= 1.0;
}
double x = fromX + (toX - fromX) * progress;
double y = fromY + (toY - fromY) * progress;
while (x < 0.0)
x += 1.0;
QGeoCoordinate result = QGeoProjection::mercatorToCoord(QDoubleVector2D(x, y));
result.setAltitude(from.altitude() + (to.altitude() - from.altitude()) * progress);
return QVariant::fromValue(result);
}
QQuickGeoCoordinateAnimation::QQuickGeoCoordinateAnimation(QObject *parent)
: QQuickPropertyAnimation(*(new QQuickGeoCoordinateAnimationPrivate), parent)
{
Q_D(QQuickGeoCoordinateAnimation);
d->interpolatorType = qMetaTypeId<QGeoCoordinate>();
d->defaultToInterpolatorType = true;
d->interpolator = QVariantAnimationPrivate::getInterpolator(d->interpolatorType);
}
QQuickGeoCoordinateAnimation::~QQuickGeoCoordinateAnimation()
{
}
/*!
\qmlproperty coordinate CoordinateAnimation::from
This property holds the coordinate where the animation should begin.
*/
QGeoCoordinate QQuickGeoCoordinateAnimation::from() const
{
Q_D(const QQuickGeoCoordinateAnimation);
return d->from.value<QGeoCoordinate>();
}
void QQuickGeoCoordinateAnimation::setFrom(const QGeoCoordinate &f)
{
QGeoMercatorCoordinatePrivate *mercator = new QGeoMercatorCoordinatePrivate();
QDoubleVector2D fromVector = QGeoProjection::coordToMercator(f);
mercator->lat = f.latitude();
mercator->lng = f.longitude();
mercator->alt = f.altitude();
mercator->m_mercatorX = fromVector.x();
mercator->m_mercatorY = fromVector.y();
QGeoCoordinate from(*mercator);
QQuickPropertyAnimation::setFrom(QVariant::fromValue(from));
}
/*!
\qmlproperty coordinate CoordinateAnimation::to
This property holds the coordinate where the animation should end.
*/
QGeoCoordinate QQuickGeoCoordinateAnimation::to() const
{
Q_D(const QQuickGeoCoordinateAnimation);
return d->to.value<QGeoCoordinate>();
}
void QQuickGeoCoordinateAnimation::setTo(const QGeoCoordinate &t)
{
QGeoMercatorCoordinatePrivate *mercator = new QGeoMercatorCoordinatePrivate();
QDoubleVector2D toVector = QGeoProjection::coordToMercator(t);
mercator->lat = t.latitude();
mercator->lng = t.longitude();
mercator->alt = t.altitude();
mercator->m_mercatorX = toVector.x();
mercator->m_mercatorY = toVector.y();
QGeoCoordinate to(*mercator);
QQuickPropertyAnimation::setTo(QVariant::fromValue(to));
}
/*!
\qmlproperty enumeration CoordinateAnimation::direction
This property holds the direction of the \l{longitude} animation of the \l{coordinate}.
Possible values are:
\list
\li CoordinateAnimation.Shortest (default) - the longitude animation goes in the direction
that produces the shortest animation path.
\li CoordinateAnimation.West - the longitude animation always goes into western direction
and may cross the date line.
\li CoordinateAnimation.East - the longitude animation always goes into eastern direction
and may cross the date line.
\endlist
\since 5.5
*/
QQuickGeoCoordinateAnimation::Direction QQuickGeoCoordinateAnimation::direction() const
{
Q_D(const QQuickGeoCoordinateAnimation);
return d->m_direction;
}
void QQuickGeoCoordinateAnimation::setDirection(QQuickGeoCoordinateAnimation::Direction direction)
{
Q_D( QQuickGeoCoordinateAnimation);
if (d->m_direction == direction)
return;
d->m_direction = direction;
switch (direction) {
case West:
d->interpolator = reinterpret_cast<QVariantAnimation::Interpolator>(&q_coordinateWestInterpolator);
break;
case East:
d->interpolator = reinterpret_cast<QVariantAnimation::Interpolator>(&q_coordinateEastInterpolator);
break;
case Shortest:
default:
d->interpolator = reinterpret_cast<QVariantAnimation::Interpolator>(&q_coordinateShortestInterpolator);
break;
}
emit directionChanged();
}
QQuickGeoCoordinateAnimationPrivate::QQuickGeoCoordinateAnimationPrivate():
m_direction(QQuickGeoCoordinateAnimation::Shortest)
{
}
QT_END_NAMESPACE
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