Method onEnter

tests/cpp-tests/Source/ParticleTest/ParticleTest.cpp:41–52

------------------------------------------------------------------ DemoFirework ------------------------------------------------------------------

//
//------------------------------------------------------------------
void DemoFirework::onEnter()
{
    ParticleDemo::onEnter();

    _emitter = ParticleFireworks::create();
    _emitter->retain();
    _background->addChild(_emitter, 10);

    _emitter->setTexture(Director::getInstance()->getTextureCache()->addImage(s_stars1));

    setEmitterPosition();
}

std::string DemoFirework::subtitle() const
{