/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
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** This file is part of the documentation of the Qt Toolkit.
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#include <QApplication>
#include <QLabel>
#include <QPropertyAnimation>
#include <QSequentialAnimationGroup>
#include "tracer.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    QWidget window;
    window.resize(720, 96);
    window.show();

    QLabel *label1 = new QLabel(&window);
    label1->setPixmap(QPixmap(":/icons/left.png"));
    label1->move(16, 16);
    label1->show();

    QLabel *label2 = new QLabel(&window);
    label2->setPixmap(QPixmap(":/icons/right.png"));
    label2->move(320, 16);
    label2->show();

    QPropertyAnimation *anim1 = new QPropertyAnimation(label1, "pos");
    anim1->setDuration(2500);
    anim1->setStartValue(QPoint(16, 16));
    anim1->setEndValue(QPoint(320, 16));

    QPropertyAnimation *anim2 = new QPropertyAnimation(label2, "pos");
    anim2->setDuration(2500);
    anim2->setStartValue(QPoint(320, 16));
    anim2->setEndValue(QPoint(640, 16));

    QSequentialAnimationGroup group;
    group.addAnimation(anim1);
    group.addAnimation(anim2);

    Tracer tracer(&window);

    QObject::connect(anim1, SIGNAL(valueChanged(QVariant)),
                     &tracer, SLOT(recordValue(QVariant)));
    QObject::connect(anim2, SIGNAL(valueChanged(QVariant)),
                     &tracer, SLOT(recordValue(QVariant)));
    QObject::connect(anim1, SIGNAL(finished()), &tracer, SLOT(checkValue()));
    QObject::connect(anim2, SIGNAL(finished()), &tracer, SLOT(checkValue()));

    group.start();
    return app.exec();
}
