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//===========================================
// Lumina-DE source code
// Copyright (c) 2015, Ken Moore
// Available under the 3-clause BSD license
// See the LICENSE file for full details
//===========================================
#ifndef _LUMINA_DESKTOP_SCREEN_SAVER_GRAV_ANIMATION_H
#define _LUMINA_DESKTOP_SCREEN_SAVER_GRAV_ANIMATION_H
//PI is equal to 2*pi
#define PI 6.2832
#include "global-includes.h"
#include "BaseAnimGroup.h"
#include <QParallelAnimationGroup>
#include <QtMath>
class Grav: public QParallelAnimationGroup{
Q_OBJECT
private:
QWidget *planet;
QPropertyAnimation *orbit;
QSize range;
QList<QPoint> path;
double radius;
void setupLoop(QPoint start, QPoint *ref){
orbit->setStartValue(start);
//Used to find overall speed. Distance from the planet to the sun
radius = qSqrt( (qPow(start.x()-ref->x(),2) + qPow(start.y()-ref->y(),2) ));
//Number of frames in animation. Increase for smother motion
double step = 1000.0;
//Random values that give the eliptical pattern to the orbit. Between 0.4 and 2.3
double xrand = (qrand()%20+4)/10.0;
double yrand = (qrand()%20+4)/10.0;
QPoint firstP = QPoint(ref->x() + xrand*start.x()*(qCos(0/step) -qSin(0/step)), ref->y() + yrand*start.y()*(qCos(0/step) -qSin(0/step)));
QPoint lastP = QPoint(ref->x() + xrand*start.x()*(qCos(PI/step) -qSin(PI/step)), ref->y() + yrand*start.y()*(qCos(PI/step) -qSin(PI/step)));
//orbit->setKeyValueAt(0, firstP);
//orbit->setKeyValueAt(1, lastP);
path.push_back(firstP);
//Loops through all steps and creates all the points of the orbit
for(int i=1; i<step; i++) {
//Calculates the new point, including gravitational pull and eccentricity. Goes from 0 to 2PI in steps.
double newX = ref->x() + xrand*start.x()*(qCos((PI*i)/step) -qSin((PI*i)/step));
double newY = ref->y() + yrand*start.y()*(qSin((PI*i)/step) + qCos((PI*i)/step));
//Calculates the radius from the sun as the distance between the points
radius = (qSqrt( (qPow(newX-ref->x(),2) + qPow(newY-ref->y(),2) )));
//Creates a new point and creates a key as part of the animation
QPoint newLoc = QPoint(newX, newY);
//orbit->setKeyValueAt(i/step, newLoc);
path.push_back(newLoc);
}
//Sets the time for a full orbit. Increasing makes the orbit slower.
path.push_back(lastP);
}
private slots:
void LoopChanged(int loop){
//Adjust the orbit animation a bit
if(loop >= 0) {
orbit->setStartValue(orbit->endValue()); //start at the previous end point
orbit->setEndValue(path.at(loop%1000));
orbit->setDuration(10);
}
}
void stopped(){ qDebug() << "Planet stopped"; planet->hide();}
public:
Grav(QWidget *parent) : QParallelAnimationGroup(parent){
planet = new QWidget(parent);
range = parent->size();
QPoint center = parent->geometry().center();
//Creates a random planet size. Between 12 and 45 pixels
double planet_radius = 1.75* ((qrand()%20)+7);
//Creates a random color in RGB, then creates a circular gradient
QString color = "rgba(" + QString::number(qrand() % 256) + ", " + QString::number(qrand() % 256) + ", " + QString::number(qrand() % 256);
QString style = "background-color: qradialgradient(spread:pad, cx:0.5, cy:0.5, radius:0.5, fx:0.5, fy:0.5, stop:0 " + color+
", 255)" + " , stop:0.83871 " + color + ", 140)" + " , stop:0.99 rgba(0, 0, 0, 255), stop:1 transparent);";
planet->setStyleSheet(style);
//setup the orbit animation
orbit = new QPropertyAnimation(planet);
orbit->setPropertyName("pos");
orbit->setTargetObject(planet);
//Creates the random position of the planet, making sure it isn't too close to the sun
QRect invalid = QRect(center+QPoint(-50,-50), center+QPoint(50,50));
QPoint tmp = center;
while(invalid.contains(center)){
int randwidth = qrand()%(range.width() - 2*planet_radius) + planet_radius;
int randheight= qrand()%(range.height()- 2*planet_radius) + planet_radius;
tmp = QPoint(randwidth, randheight);
}
//Creates all frames for the animation
setupLoop(tmp, ¢er);
this->addAnimation(orbit);
planet->show();
//Ensures the screensaver will not stop until the user wishes to login or it times out
this->setLoopCount(2000); //number of orbits
orbit->setEndValue(path.at(0));
LoopChanged(0); //load initial values
//Sets the initial size and location of the planet
planet->setGeometry(QRect(orbit->startValue().toPoint(), QSize(planet_radius, planet_radius)));
connect(this, SIGNAL(currentLoopChanged(int)), this, SLOT(LoopChanged(int)) );
connect(this, SIGNAL(finished()), this, SLOT(stopped()) );
}
~Grav(){}
};
class GravAnimation : public BaseAnimGroup{
Q_OBJECT
private:
QList<Grav*> planets;
QWidget *sun;
QPropertyAnimation *wobble;
private slots:
void checkFinished(){
int running = 0;
for(int i=0; i<this->animationCount(); i++){
if(this->animationAt(i)->state()==QAbstractAnimation::Running){ running++; }
}
if(running<=1){ wobble->stop(); emit wobble->finished();}
}
public:
GravAnimation(QWidget *parent, QSettings *set) : BaseAnimGroup(parent, set){}
~GravAnimation(){
//this->stop();
}
void LoadAnimations(){
//Creates the sun, which is a thin shell with a gradient from green to yellow
sun = new QWidget(canvas);
QPoint center = canvas->geometry().center();
QString sunstyle = QStringLiteral("background-color:qradialgradient(spread:pad, cx:0.5, cy:0.5, radius:0.5, fx:0.5, fy:0.5, ") +
QStringLiteral("stop:0 rgba(0, 0, 0, 0), stop:0.38 rgba(0, 0, 0, 0), stop:0.4 rgba(82, 121, 76, 33), stop:0.5 rgba(159, 235, 148, 64), ") +
QStringLiteral("stop:0.6 rgba(255, 238, 150, 129), stop:0.7 rgba(0, 0, 0, 0));");
sun->setStyleSheet(sunstyle);
//Creates the sun's pulsing animation
wobble = new QPropertyAnimation(sun);
wobble->setPropertyName("geometry");
wobble->setTargetObject(sun);
QRect initgeom = QRect(center-QPoint(12,12), QSize(60, 60));
wobble->setStartValue(initgeom);
wobble->setKeyValueAt(0, initgeom ); //starting point
wobble->setKeyValueAt(1, initgeom ); //starting point
wobble->setKeyValueAt(0.5, QRect(center-QPoint(18,18), QSize(90, 90))); //starting point
wobble->setDuration(2000);
wobble->setLoopCount(-1);
this->addAnimation(wobble);
sun->show();
sun->setGeometry(initgeom);
while(planets.length()>0){ planets.takeAt(0)->deleteLater(); }
//Gives the screensaver a black background
canvas->setStyleSheet("background: black;");
//Pulls number of planets from settings, with 10 as default
int number = settings->value("planets/number",10).toInt();
//Loops through all planets and sets up the animations, then adds them to the base group and vector, which
for(int i=0; i<number; i++){
Grav *tmp = new Grav(canvas);
this->addAnimation(tmp);
connect(tmp, SIGNAL(finished()), this, SLOT(checkFinished()));
planets << tmp;
}
}
};
#endif
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