animpoint.cpp

#include "animpoint.h"

#include <math.h>

AnimPoint::AnimPoint()
{
    init();
}

void AnimPoint::operator= ( const AnimPoint & other )
{
    copy (other);
}

void AnimPoint::operator= ( const QPointF & other )
{
    init();
    setX (other.x() );
    setY (other.x() );
}

bool AnimPoint::operator== ( const QPointF& other )
{
    QPointF p( x(),y());
    return p == other;
}

bool AnimPoint::operator== ( AnimPoint  other )
{
    if (rx() != other.rx() ) return false;
    if (ry() != other.ry() ) return false;
    if (startPos != other.startPos) return false;
    if (destPos  != other.destPos) return false;
    if (animated != other.animated ) return false;

    return true;
}

void AnimPoint::init ()
{
    animated=false;
    n=0;
    startPos=QPointF(0,0);
    destPos=QPointF(0,0);
    vector=QPointF(0,0);
    animTicks=10;
}

void AnimPoint::copy (AnimPoint other)
{
    setX (other.x() );
    setY (other.x() );
    startPos=other.startPos;
    destPos=other.destPos;
    vector=other.vector;
    animated=other.animated;
    n=other.n;
    animTicks=other.animTicks;
}

void AnimPoint::setStart(const QPointF &p)
{
    startPos=p;
    initVector();
}

QPointF AnimPoint::getStart()
{
    return startPos;
}


void AnimPoint::setDest(const QPointF &p)
{
    destPos=p;
    initVector();
}

QPointF AnimPoint::getDest()
{
    return destPos;
}

void AnimPoint::setTicks (const uint &t)
{
    animTicks=t;
}

uint AnimPoint::getTicks()
{
    return (uint) animTicks;
}

void AnimPoint::setAnimated(bool b)
{
    animated=b;
    if (b) n=0;
}

bool AnimPoint::isAnimated()
{
    return animated;
}

bool AnimPoint::animate()
{
    if (!animated) return false;
    n++;
    if (n>animTicks)
    {
	vector=QPointF(0,0);
	animated=false;
	setX (destPos.x() );
	setY (destPos.y() );
	return false;
    }

    // Some math to slow down the movement in the end
    qreal f=1-n/(qreal)animTicks;
    qreal ff=1-f*f*f;
    setX (startPos.x() + vector.x()*ff );
    setY (startPos.y() + vector.y()*ff );

    return animated;
}

void AnimPoint::stop()
{
    animated=false;
    setX (destPos.x());
    setY (destPos.y());
}

void AnimPoint::initVector()
{
    vector.setX (destPos.x()-startPos.x() );
    vector.setY (destPos.y()-startPos.y() );
}