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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: openBossa - INdT (renato.chencarek@openbossa.org)
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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 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.
**
** If you have questions regarding the use of this file, please contact
** the openBossa stream from INdT (renato.chencarek@openbossa.org).
** $QT_END_LICENSE$
**
****************************************************************************/
#include "forecaststars.h"
#include "settings.h"
#include "pixmaploader.h"
#include <QTime>
#include <QPropertyAnimation>
typedef struct
{
const char * const prefix;
const qreal radius;
QString name() const { return prefix; }
QPixmap pic() const { return PixmapLoader::getPic(name()); }
private:
} StarObjectData;
static const int StarTypesCount = 3;
static StarObjectData StarObjectsData[StarTypesCount] = {
{"star_01", 0.30000},
{"star_02", 0.22428},
{"star_03", 0.16666}
};
// ForecastStars
ForecastStars::Star::Star(int type, QGraphicsItem *parent)
: QGraphicsPixmapItem(StarObjectsData[type].pic(), parent)
, starType(type)
{
setOpacity(0.0);
hide();
}
ForecastStars::ForecastStars(int count, QGraphicsItem *parent)
: QGraphicsItem(parent)
, m_progress(1.0)
{
setFlag(QGraphicsItem::ItemHasNoContents, true);
qsrand(QTime(0, 0).secsTo(QTime::currentTime()) * qrand());
for (int i = 0; i < count; ++i)
m_starts.append(new Star(qrand() % 3, this));
}
int ForecastStars::loadImages()
{
for (int i = 0; i < StarTypesCount;++i)
PixmapLoader::load(StarObjectsData[i].name());
return StarTypesCount;
}
QAbstractAnimation *ForecastStars::getAnimation()
{
QPropertyAnimation *result = new QPropertyAnimation(this, "progress");
result->setStartValue(0.0);
result->setEndValue(1.0);
result->setEasingCurve(QEasingCurve::OutBack);
result->setDuration(m_starts.count() * 100);
connect(result, SIGNAL(stateChanged(QAbstractAnimation::State,QAbstractAnimation::State)),
this, SLOT(animationStateChanged(QAbstractAnimation::State,QAbstractAnimation::State)));
return result;
}
void ForecastStars::animationStateChanged(QAbstractAnimation::State oldState,
QAbstractAnimation::State newState)
{
if (oldState == QAbstractAnimation::Stopped && newState == QAbstractAnimation::Running) {
foreach (Star *star, m_starts) {
star->setOpacity(0.0);
star->show();
}
}
}
void ForecastStars::setRect(QRectF rect)
{
setPos(rect.topLeft());
m_boundingRect = rect;
m_boundingRect.moveTo(0.0, 0.0);
updateStarsPositions();
}
QRectF ForecastStars::boundingRect () const
{
return m_boundingRect;
}
QRectF ForecastStars::rect() const
{
QRectF result(m_boundingRect);
result.moveTo(pos());
return result;
}
void ForecastStars::paint(QPainter *painter, const QStyleOptionGraphicsItem *opt, QWidget *widget)
{
Q_UNUSED(painter);
Q_UNUSED(opt);
Q_UNUSED(widget);
}
void ForecastStars::setProgress(qreal progress)
{
m_progress = progress;
const qreal delta = 1.0 / qreal(m_starts.count());
for (int i = 0; i < m_starts.count(); ++i) {
qreal val = progress - i * delta;
m_starts[i]->setOpacity(val < 0.0 ? 0.0 : val > delta ? 1.0 : val / delta);
}
}
bool ForecastStars::checkColision(const QRectF &rect1, qreal radius1,
const QRectF &rect2, qreal radius2)
{
QPointF p1(rect1.left() + rect1.width() / 2.0, rect1.top() + rect1.height() / 2.0);
QPointF p2(rect2.left() + rect2.width() / 2.0, rect2.top() + rect2.height() / 2.0);
qreal min = radius1 + radius2;
return qAbs(p1.x() - p2.x()) > min && qAbs(p1.y() - p2.y()) > min;
}
bool ForecastStars::checkColision(Star *item1, Star *item2)
{
QRectF r1 = item1->boundingRect();
r1.moveTo(item1->pos());
qreal radius1 = item1->boundingRect().width() * StarObjectsData[item1->starType].radius;
QRectF r2 = item2->boundingRect();
r2.moveTo(item2->pos());
qreal radius2 = item2->boundingRect().width() * StarObjectsData[item2->starType].radius;
return checkColision(r1, radius1, r2, radius2);
}
bool ForecastStars::checkColision(Star *star, const QList<Star*> &items)
{
foreach(Star *item, items) {
if (!checkColision(star, item))
return false;
}
return true;
}
QPointF ForecastStars::getRandomPos(const QRectF &border)
{
return QPointF(qreal(qrand()) / qreal(RAND_MAX) * border.width() + border.left(),
qreal(qrand()) / qreal(RAND_MAX) * border.height() + border.top());
}
void ForecastStars::updateStarsPositions()
{
QList<Star*> items;
qsrand(QTime(0, 0).secsTo(QTime::currentTime()) * qrand());
foreach(Star *star, m_starts) {
const QRectF rect(boundingRect());
const QRectF starRect(star->boundingRect());
const QPointF topLeft(rect.left() - starRect.left(), rect.top() - starRect.top());
const QPointF bottomRight(rect.right() - starRect.right(),
rect.bottom() - starRect.bottom());
const QRectF border(topLeft, bottomRight);
int tries = 10;
do
star->setPos(getRandomPos(border));
while (tries-- && !checkColision(star, items));
items.append(star);
}
}
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